A thin film corona device with uniform corona gap

Abstract

The invention provides a thin-film corona device with uniform corona gap, and relates to the technical field of corona devices. The device comprises a sliding rod fixedly connected to a telescopic end of an electric telescopic rod, wherein an outer wall of the sliding rod is fixedly connected to a first limiting rod, a connecting ring is slidably connected to the outer wall of the sliding rod, a scissor-type connecting rod is fixedly connected to the bottom of the connecting ring, a second limiting rod is slidably connected to the outer wall of the sliding rod, a first connecting plate is fixedly connected to the bottom of the scissor-type connecting rod, and a second connecting plate is fixedly connected to the bottom of the scissor-type connecting rod; through the coordinated use of the sliding rod, the first limiting rod, the connecting ring, the scissor-type connecting rod, the extension rod, the connecting rod, the fixed clamping block, the extrusion spring, the clamping ring, and the second limiting rod, the distance between the first connecting plate, the second connecting plate, the connecting groove, and the electric shock rod can be adjusted conveniently; since the distance between the intersections of the scissor-type connecting rod is the same during the extension process, the distance between the electric shock rods can be guaranteed to be the same during use, thereby making the corona gap uniform.

Description

Technical Field

[0001] The invention relates to the technical field of corona equipment, in particular to a thin-film corona equipment with uniform corona gap. Background Art

[0002] Corona equipment, also known as corona machine or corona treatment machine, is a device that uses the corona discharge phenomenon to pre-treat or modify the surface of materials. It is mainly used for surface treatment of silicone rubber, plastic, metal, textiles, paper, rubber and other materials to improve their surface properties, such as increasing surface tension, improving adhesion, increasing wettability and removing impurities.

[0003] However, when operators adjust the corona electrodes, errors may occur in human operation, which may lead to inaccurate adjustment and uneven corona gaps. Uneven corona gaps may lead to different corona treatment intensities on the film surface, resulting in inconsistent treatment effects. Some areas may be over-treated, while others may be under-treated. Over-treated areas may experience corona breakdown, resulting in reduced sealing and barrier properties of the film, or even small holes, affecting the performance of the film. Under-treated areas may not achieve the expected modification effect, such as an insignificant increase in adhesion. Due to inconsistent treatment effects, product quality may fluctuate greatly, increasing scrap rates and reducing production efficiency. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings existing in the prior art and to provide a thin film corona device with uniform corona gap to solve the problem of uneven corona gap in the above technical solution.

[0005] In order to achieve the above object, the present invention adopts the following technical solution: a thin film corona device with uniform corona gap, comprising a protective cover, the outer side wall of the protective cover is fixedly connected with an electric telescopic rod;

[0006] An adjustment structure is provided inside the protective cover;

[0007] A fixing structure is arranged outside the adjustment structure;

[0008] A supporting structure is provided at the bottom of the protective cover;

[0009] The adjustment structure includes a sliding rod fixedly connected to the telescopic end of the electric telescopic rod, the outer side wall of the sliding rod is fixedly connected to the first limit rod, the outer side wall of the sliding rod is slidably connected to a connecting ring, the bottom of the connecting ring is fixedly connected to a scissor-type connecting rod, the outer side wall of the sliding rod is slidably connected to the second limit rod, the bottom of the scissor-type connecting rod is fixedly connected to the first connecting plate, the bottom of the scissor-type connecting rod is fixedly connected to the second connecting plate, the top of the second connecting plate is provided with a connecting groove, the bottom of the second connecting plate is fixedly connected to the electric shock stick, the bottom of the scissor-type connecting rod is fixedly connected to an extension rod, the bottom of the extension rod is slidably connected to a connecting rod, one end of the connecting rod is provided with a fixed clamping block, the inner side wall of the fixed clamping block is fixedly connected to an extrusion spring, and the end of the extrusion spring away from the inner side wall of the fixed clamping block is fixedly connected to a clamping ring, one end of the scissor-type connecting rod is slidably connected to the first limit rod, and the end of the scissor-type connecting rod away from the first limit rod is slidably connected to the second limit rod.

[0010] As a preferred embodiment, a movable groove is provided on the bottom outer wall of the connecting rod, the top of the fixed block is fixedly connected to a cylinder, the outer wall of the cylinder is fixedly connected to a limiting block, the top of the cylinder is fixedly connected to a connecting spring, and the end of the connecting spring away from the cylinder is fixedly connected to the bottom of the connecting rod.

[0011] The beneficial effect of adopting the above further solution is: by providing the movable groove, the cylinder, the limit block and the connecting spring, it is convenient for the operator to adjust the distance between the fixed block and the connecting rod during installation, thereby improving the installation efficiency.

[0012] As a preferred embodiment, a rolling groove is provided on the top of the fixed block, an extension column is fixedly connected to the bottom of the clamping ring, a roller is rotatably connected to the bottom of the extension column, and the outer wall of the roller is fitted with the bottom of the rolling groove.

[0013] The beneficial effect of adopting the above further solution is: by providing the rolling groove, the extension column and the roller, the stability of the clamping ring is improved, and the friction between the clamping ring, the extension column and the fixed clamping block is reduced.

[0014] As a preferred embodiment, a limiting groove is formed through the top of the first limiting rod, a sliding column is fixedly connected to the top of one end of the scissor-type connecting rod close to the first limiting rod, the outer wall of the sliding column fits with the inner wall of the limiting groove, a sliding groove is formed on the top of the connecting rod, and the outer wall of the extension rod fits with the inner wall of the sliding groove.

[0015] The beneficial effect of adopting the above further solution is: by providing a sliding column and a limit groove, it is convenient to limit the horizontal angle of the scissor-type connecting rod, thereby avoiding the horizontal angle of the scissor-type connecting rod from being offset during use, thereby avoiding uneven corona effect.

[0016] As a preferred embodiment, a cavity is provided inside the extension rod, a buffer spring is fixedly connected to the inner bottom of the extension rod, and one end of the buffer spring away from the bottom of the extension rod is fixedly connected to the telescopic end of the extension rod.

[0017] The beneficial effect of adopting the above further solution is that by providing the cavity and the buffer spring, the extension and retraction of the extension rod can be buffered.

[0018] As a preferred embodiment, the fixing structure includes a slot extending through the outer wall of the connecting rod, the interior of the connecting rod is fixedly connected to a limiting column, the connecting rod is slidably connected to an extrusion plate through the limiting column, a connecting hole is provided on the top of the extrusion plate, and the inner wall of the connecting hole is adapted to the outer wall of the limiting column.

[0019] The beneficial effect of adopting the above further solution is that by providing the limiting columns and the connecting holes, the film can be pressed easily to avoid wrinkles in the film during the corona process.

[0020] As a preferred embodiment, a pressure spring is fixedly connected to the top of the extrusion plate, and one end of the pressure spring away from the extrusion plate is fixedly connected to the inner wall of the connecting rod. The pressure spring is located outside the limiting column, and the outer wall of the extrusion plate is fixedly connected to a pulling plate.

[0021] The beneficial effect of adopting the above further scheme is: by setting a pressure spring and a pulling plate, the pressure spring can easily apply pressure to the connecting hole, thereby preventing the connecting hole from being unable to press the film during use, and the pulling plate can facilitate the operator to adjust the height of the connecting hole.

[0022] As a preferred embodiment, the support structure includes a support frame fixedly connected to the bottom of the protective cover, the inner wall of the support frame is provided with a conveyor belt, the top of the support frame is provided with a caliper, the support frame is rotatably connected to a film roller through the caliper, and the outer wall of the support frame is fixedly connected to a motor.

[0023] The beneficial effect of adopting the above further solution is that by providing a support frame, a conveyor belt and a caliper, the conveyor belt facilitates the transmission of the film.

[0024] Compared with the prior art, the advantages and positive effects of the present invention are:

[0025] By using the sliding rod, the first limiting rod, the connecting ring, the scissor-type connecting rod, the extension rod, the connecting rod, the fixed block, the extrusion spring, the clamping ring, and the second limiting rod in coordination, it is convenient to adjust the distance between the first connecting plate, the second connecting plate, the connecting groove, and the electric shock rod. Since the distance between the intersections of the scissor-type connecting rod is the same during the extension process, the distance between the electric shock rods can be ensured to be the same during use, thereby making the corona gap uniform.

[0026] By using the movable groove, cylinder, limit block, connecting spring, rolling groove, extension column and roller in coordination, it is convenient to adjust the distance between the fixed block and the connecting rod, so that the clamping ring can clamp film rollers of different sizes, thereby improving the practicability of the equipment.

[0027] The coordinated use of the limit column, the pressure spring, the connection hole, the extrusion plate and the pulling plate facilitates the fastening of the film, thereby avoiding the film from wrinkling and position shifting during use, which in turn affects the corona effect of the film. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the overall structure and related parts of a thin-film corona device with uniform corona gap according to the present invention;

[0029] Figure 2 It is a schematic diagram of a scissor-type connecting rod structure and related parts of a thin-film corona device with uniform corona gap according to the present invention;

[0030] Figure 3 It is a schematic diagram of the first limiting rod structure and related parts of a thin film corona device with uniform corona gap according to the present invention;

[0031] Figure 4 It is a schematic diagram of a fixed card block structure and related parts of a thin film corona device with uniform corona gap according to the present invention;

[0032] Figure 5 It is a schematic diagram of an extended column structure and related parts of a thin film corona device with uniform corona gap according to the present invention;

[0033] Figure 6 It is a schematic diagram of a buffer spring structure and related parts of a thin film corona device with uniform corona gap according to the present invention;

[0034] Figure 7 It is a schematic diagram of an extruded plate structure and related parts of a thin film corona device with uniform corona gap according to the present invention;

[0035] Figure 8 The present invention is a schematic diagram of a transmission belt structure and related parts of a thin film corona device with uniform corona gap.

[0036] Legend:

[0037] 1. Protective cover;

[0038] 2. Electric telescopic rod;

[0039] 3. Adjustment structure; 301. Sliding rod; 302. First limiting rod; 303. Connecting ring; 304. Scissor-type connecting rod; 305. First connecting plate; 306. Second connecting plate; 307. Connecting groove; 308. Electric shock stick; 309. Extension rod; 310. Connecting rod; 311. Fixed block; 312. Extrusion spring; 313. Snap ring; 314. Film roller; 315. Sliding column; 316. Limiting groove; 317. Sliding groove; 318. Moving groove; 319. Cylinder; 320. Limiting block; 321. Connecting spring; 322. Rolling groove; 323. Extension column; 324. Roller; 325. Cavity; 326. Buffer spring; 327. Second limiting rod;

[0040] 4. Fixed structure; 401. Slot; 402. Limiting column; 403. Pressure spring; 404. Connecting hole; 405. Extrusion plate; 406. Pulling plate;

[0041] 5. Support structure; 501. Support frame; 502. Conveyor belt; 503. Caliper; 504. Motor. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Example

[0044] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the present invention provides a technical solution: a thin-film corona device with uniform corona gap, comprising a protective cover 1, an outer side wall of the protective cover 1 is fixedly connected with an electric telescopic rod 2;

[0045] An adjustment structure 3 is provided inside the protective cover 1;

[0046] A fixing structure 4 is arranged outside the adjustment structure 3;

[0047] A support structure 5 is provided at the bottom of the protective cover 1;

[0048] The adjustment structure 3 includes a sliding rod 301 fixedly connected to the telescopic end of the electric telescopic rod 2, the outer wall of the sliding rod 301 is fixedly connected to the first limit rod 302, the outer wall of the sliding rod 301 is slidably connected to a connecting ring 303, four connecting rings 303 are provided, and the bottom of the four connecting rings 303 is fixedly connected to a scissor-type connecting rod 304, the outer wall of the sliding rod 301 is slidably connected to a second limit rod 327, the second limit rod 327 is the same as the first limit rod 302, and the bottom of the scissor-type connecting rod 304 is fixedly connected to the first connecting plate 305, the first connecting plate 305 is at the intersection of the scissor-type connecting rod 304, the bottom of the scissor-type connecting rod 304 is fixedly connected with the second connecting plate 306, the second connecting plate 306 is located at the connection point of the scissor-type connecting rod 304, and the top of the second connecting plate 306 is provided with a connecting groove 307, and the connection point of the scissor-type connecting rod 304 is provided with a connecting rod 310, the connecting rod 310 is located inside the connecting groove 307, and the outer side wall of the connecting rod 310 is adapted to the inner side wall of the connecting groove 307, and the connecting rod 310 is located inside the connecting groove 307. The bottom of the second connecting plate 306 is fixedly connected with an electric shock rod 308, which is electrically connected to the power supply, and the electric shock rod 308 is evenly distributed at the bottom of the first connecting plate 305 and the second connecting plate 306. The bottom of the scissor-type connecting rod 304 is fixedly connected with an extension rod 309, and four extension rods 309 are provided. The four extension rods 309 are respectively located at the four corners of the scissor-type connecting rod 304. The bottom of the four extension rods 309 is slidably connected to two connecting rods 310, and the two connecting rods 310 are symmetrically distributed with respect to the central axis plane of the protective cover 1. , one end of each of the two connecting rods 310 is provided with a fixed block 311, and the inner side walls of the two fixed blocks 311 are fixedly connected with four extrusion springs 312, and the eight extrusion springs 312 are divided into four groups, and one end of each group of extrusion springs 312 away from the inner side wall of the fixed block 311 is fixedly connected with a clamping ring 313, and the outer side walls of the four clamping rings 313 are provided with an arc, one end of the scissor-type connecting rod 304 is slidably connected to the first limiting rod 302, and the end of the scissor-type connecting rod 304 away from the first limiting rod 302 is slidably connected to the second limiting rod 327;

[0049] During use, the staff can adjust the distance between the two connecting rods 310 according to the width of the film. As one of the connecting rods 310 moves, the two extension rods 309 will drive the second limiting rod 327 to gradually move away from the first limiting rod 302, and the second limiting rod 327 will drive the scissor-type connecting rod 304 to be evenly dispersed in the process of gradually moving away from the first limiting rod 302. At this time, the gaps between the first connecting plate 305 and the second connecting plate 306 set at the bottom of the scissor-type connecting rod 304 are evenly distributed, so that the gaps between the electric shock rods 308 set at the bottom of the first connecting plate 305 and the second connecting plate 306 are evenly distributed. Furthermore, the operator engages the fixed block 311 with the roller body on both sides of the film, so that the outer wall of the retaining ring 313 is in contact with the outer wall of the roller body, thereby limiting the distance between the second limiting rod 327 and the first limiting rod 302, and thereby ensuring that the gaps between the electric shock rods 308 are always evenly distributed.

[0050] Reference Figure 5 A movable groove 318 is provided on the bottom outer wall of the connecting rod 310, a cylinder 319 is fixedly connected to the top of the fixed block 311, the outer wall of the cylinder 319 is matched with the cavity 325 provided at the bottom of the connecting rod 310, the outer wall of the cylinder 319 is fixedly connected to the limit block 320, the limit block 320 is located inside the movable groove 318, and the outer wall of the limit block 320 is matched with the inner wall of the movable groove 318, the top of the cylinder 319 is fixedly connected with a connecting spring 321, and the end of the connecting spring 321 away from the cylinder 319 is fixedly connected to the bottom of the connecting rod 310;

[0051] During use, the operator can pull the fixed block 311 toward the bottom of the connecting rod 310. Under the action of external force, the cylinder 319 pulls the connecting spring 321, thereby extending the connecting spring 321, and then adjusting the distance between the fixed block 311 and the connecting rod 310 to adapt to rollers of different sizes.

[0052] Reference Figure 5 A rolling groove 322 is provided at the top of the fixed block 311, and an extension column 323 is fixedly connected to the bottom of one of the retaining rings 313, and a roller 324 is rotatably connected to the bottom of the extension column 323. The outer wall of the roller 324 fits with the bottom of the rolling groove 322. The extension column 323 can support the retaining ring 313 to prevent the position of the retaining ring 313 from changing during use, and the roller 324 can reduce the friction between the extension column 323 and the fixed block 311 to reduce loss.

[0053] Reference Figure 3The top of the first limit rod 302 is provided with a limit groove 316, and the top of the scissor-type link 304 near the first limit rod 302 is fixedly connected with a sliding column 315, and two sliding columns 315 are respectively located at the two ends of the limit groove 316, and the outer side walls of the two sliding columns 315 are matched with the inner side walls of the limit groove 316. When the scissor-type link 304 is extended and contracted, the two sliding columns 315 can slide inside the first limit rod 302, thereby limiting the horizontal angle of the scissor-type link 304 and avoiding the extension of the scissor-type link 304. A sliding groove 317 is provided on the top of the connecting rod 310, and the outer side wall of the extension rod 309 is adapted to the inner side wall of the sliding groove 317.

[0054] Reference Figure 1 and Figure 6 A cavity 325 is provided inside the extension rod 309, and a buffer spring 326 is fixedly connected to the inner bottom of the extension rod 309. One end of the buffer spring 326 away from the bottom of the extension rod 309 is fixedly connected to the telescopic end of the extension rod 309, and the limiting groove 316 can provide telescopic buffer for the extension rod 309.

[0055] Reference Figure 1 and Figure 7 The fixing structure 4 includes a slot 401 that passes through the outer wall of the connecting rod 310, and the connecting rod 310 is fixedly connected to a limiting column 402 inside. The limiting column 402 is located inside the slot 401. The connecting rod 310 is slidably connected to an extrusion plate 405 through the limiting column 402. A connecting hole 404 is opened on the top of the extrusion plate 405. The inner wall of the connecting hole 404 is adapted to the outer wall of the limiting column 402. When in use, the operator can press the connecting hole 404 above the film, thereby avoiding wrinkles, position displacement and other problems in the film during processing.

[0056] Reference Figure 1 and Figure 8 A pressure spring 403 is fixedly connected to the top of the extrusion plate 405, and the pressure spring 403 is located inside the slot 401. The end of the pressure spring 403 away from the extrusion plate 405 is fixedly connected to the inner wall of the connecting rod 310, and the pressure spring 403 is located outside the limiting column 402. A pulling plate 406 is fixedly connected to the outer wall of the extrusion plate 405, and the pulling plate 406 is located on the side of the connecting rod 310 away from the extrusion plate 405. When in use, the operator can use the pulling plate 406 to adjust the height of the extrusion plate 405. When the operator releases the pulling plate 406, the extrusion plate 405 is pushed toward the direction of the film under the action of the elastic force of the pressure spring 403 itself, thereby limiting the film.

[0057] Reference Figure 1The support structure 5 includes a support frame 501 fixedly connected to the bottom of the protective cover 1, a conveyor belt 502 is arranged on the inner wall of the support frame 501, a caliper 503 is arranged on the top of the support frame 501, and the support frame 501 is rotatably connected to the film roller 314 through the caliper 503. The outer walls at both ends of the film roller 314 are in contact with the outer wall of the clamping ring 313, thereby limiting the distance between the two fixed blocks 311. The outer wall of the support frame 501 is fixedly connected to the motor 504, and the motor 504 is connected to an external power supply.

[0058] Working principle:

[0059] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the film corona device with uniform corona gap, when in use, firstly uses the caliper 503 to limit the film roller 314. Further, the staff can adjust the distance between the two connecting rods 310 according to the width of the film. As one of the connecting rods 310 moves, the two extension rods 309 will drive the second limiting rod 327 to gradually move away from the first limiting rod 302, and the second limiting rod 327 will drive the scissor-type connecting rod 304 to disperse evenly in the process of gradually moving away from the first limiting rod 302. At this time, the scissor-type connecting rod The gaps between the first connecting plate 305 and the second connecting plate 306 provided at the bottom of 304 are evenly distributed, so that the gaps between the electric shock bars 308 provided at the bottom of the first connecting plate 305 and the second connecting plate 306 are evenly distributed. Furthermore, the operator engages the fixed block 311 with the roller bodies on both sides of the film, so that the outer wall of the clamping ring 313 fits with the outer wall of the roller body, thereby limiting the distance between the second limiting rod 327 and the first limiting rod 302, and further making the gaps between the electric shock bars 308 always evenly distributed;

[0060] Furthermore, the operator can use the pulling plate 406 to adjust the height of the extrusion plate 405. When the pulling plate 406 is pulled toward the top of the connecting rod 310, the extrusion plate 405 compresses the pressure spring 403. When the operator releases the pulling plate 406, the pressure spring 403 itself acts to push the extrusion plate 405 toward the direction of the film, thereby limiting the film. Finally, the motor 504 is started, and the motor 504 drives the conveyor belt 502 to rotate, thereby transmitting and processing the film.

[0061] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A thin film corona device with uniform corona gap, comprising a protective cover (1), characterized in that: An electric telescopic rod (2) is fixedly connected to the outer side wall of the protective cover (1); An adjustment structure (3) is provided inside the protective cover (1); A fixing structure (4) is arranged outside the adjustment structure (3); A supporting structure (5) is provided at the bottom of the protective cover (1); The adjustment structure (3) comprises a sliding rod (301) fixedly connected to the telescopic end of the electric telescopic rod (2); the outer side wall of the sliding rod (301) is fixedly connected to a first limiting rod (302); the outer side wall of the sliding rod (301) is slidably connected to a connecting ring (303); the bottom of the connecting ring (303) is fixedly connected to a scissor-type connecting rod (304); the outer side wall of the sliding rod (301) is slidably connected to a second limiting rod (327); the bottom of the scissor-type connecting rod (304) is fixedly connected to a first connecting plate (305); the bottom of the scissor-type connecting rod (304) is fixedly connected to a second connecting plate (306); the top of the second connecting plate (306) is provided with a connecting groove (307); ... The bottom of the plate (306) is fixedly connected to an electric shock rod (308), the bottom of the scissor-type connecting rod (304) is fixedly connected to an extension rod (309), the bottom of the extension rod (309) is slidably connected to a connecting rod (310), one end of the connecting rod (310) is provided with a fixed clamping block (311), the inner side wall of the fixed clamping block (311) is fixedly connected to an extrusion spring (312), one end of the extrusion spring (312) away from the inner side wall of the fixed clamping block (311) is fixedly connected to a clamping ring (313), one end of the scissor-type connecting rod (304) is slidably connected to the first limiting rod (302), and the end of the scissor-type connecting rod (304) away from the first limiting rod (302) is slidably connected to the second limiting rod (327); The fixing structure (4) comprises a slot (401) penetrating through the outer wall of the connecting rod (310); the interior of the connecting rod (310) is fixedly connected to a limiting column (402); the connecting rod (310) is slidably connected to an extrusion plate (405) via the limiting column (402); a connecting hole (404) is formed on the top of the extrusion plate (405); the inner wall of the connecting hole (404) is adapted to the outer wall of the limiting column (402); A pressure spring (403) is fixedly connected to the top of the extrusion plate (405), one end of the pressure spring (403) away from the extrusion plate (405) is fixedly connected to the inner wall of the connecting rod (310), the pressure spring (403) is located outside the limiting column (402), and the outer wall of the extrusion plate (405) is fixedly connected to a pulling plate (406).

2. The thin film corona device with uniform corona gap according to claim 1, characterized in that: The bottom outer wall of the connecting rod (310) is provided with a movable groove (318); the top of the fixed block (311) is fixedly connected to a cylinder (319); the outer wall of the cylinder (319) is fixedly connected to a limit block (320); the top of the cylinder (319) is fixedly connected to a connecting spring (321); and one end of the connecting spring (321) away from the cylinder (319) is fixedly connected to the bottom of the connecting rod (310).

3. The thin film corona device with uniform corona gap according to claim 2, characterized in that: A rolling groove (322) is formed on the top of the fixed clamping block (311); an extension column (323) is fixedly connected to the bottom of the clamping ring (313); a roller (324) is rotatably connected to the bottom of the extension column (323); and an outer wall of the roller (324) is in contact with the bottom of the rolling groove (322).

4. The thin film corona device with uniform corona gap according to claim 1, characterized in that: A limiting groove (316) is formed through the top of the first limiting rod (302); a sliding column (315) is fixedly connected to the top of one end of the scissor-type connecting rod (304) close to the first limiting rod (302); an outer wall of the sliding column (315) matches an inner wall of the limiting groove (316); a sliding groove (317) is formed on the top of the connecting rod (310); and an outer wall of the extension rod (309) matches an inner wall of the sliding groove (317).

5. The thin film corona device with uniform corona gap according to claim 1, characterized in that: A cavity (325) is provided inside the extension rod (309), a buffer spring (326) is fixedly connected to the inner bottom of the extension rod (309), and one end of the buffer spring (326) away from the bottom of the extension rod (309) is fixedly connected to the telescopic end of the extension rod (309).

6. The thin-film corona device with uniform corona gap according to claim 1, characterized in that: The support structure (5) comprises a support frame (501) fixedly connected to the bottom of the protective cover (1); a conveyor belt (502) is arranged on the inner wall of the support frame (501); a caliper (503) is arranged on the top of the support frame (501); the support frame (501) is rotatably connected to a film roller (314) via the caliper (503); and a motor (504) is fixedly connected to the outer wall of the support frame (501).

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