Film feeding speed feedback adjusting device

Abstract

The utility model provides a film feeding speed feedback adjusting device which comprises a rack assembly, and a soft film roller is arranged on the rack assembly. The feeding assembly is rotatably connected with the rack assembly; the discharging assembly is rotatably connected with the rack assembly; the adjusting assembly is located between the feeding assembly and the discharging assembly, the adjusting assembly comprises a guide rail structure, a moving structure and a pressing roller structure, the moving structure is movably connected with the guide rail structure, and the pressing roller structure is connected with the moving structure. According to the technical scheme, the problem that in the soft film feeding process in the prior art, due to improper control over the rotating speed of the soft film roller, a film body is broken is effectively solved.

Description

Technical Field

[0001] The present application relates to the technical field of soft film conveying, and in particular to a film conveying speed feedback regulating device. Background Art

[0002] In order to protect the surfaces of various workpieces and improve surface performance, products need to be coated in many production processes, such as EVA film for photovoltaic modules and protective film for glass surfaces.

[0003] Soft film is usually wound on a roll for storage. Generally, during the film feeding process, the soft film on the roll is unrolled and transported to other processes. In order to ensure that the film does not break during the transportation process, it is particularly important to monitor the film feeding speed. Usually, a speed detection structure is set at the discharge end of the film feeding equipment, and a speed detection structure is set at the soft film roll. The speed of the soft film roll is changed according to the discharge speed to avoid film breakage.

[0004] In the prior art, since the soft film on the roll is multi-layered, the outer diameter of the soft film roll is an uncertain value. Therefore, there is an error in changing the rotation speed of the soft film roll according to the discharge speed, which is difficult to control, such as CN117342348A. Utility Model Content

[0005] A technical problem to be solved by the present application is that during the soft film feeding process, there is a problem of film breakage caused by improper control of the rotation speed of the soft film roller.

[0006] In order to solve the above technical problems, the present application provides a film feeding speed feedback adjustment device.

[0007] A film feeding speed feedback adjustment device provided according to the present application includes: a frame assembly, a soft film roller is arranged on the frame assembly; a feed assembly, the feed assembly is rotatably connected to the frame assembly; a discharge assembly, the discharge assembly is rotatably connected to the frame assembly; an adjustment assembly, the adjustment assembly is located between the feed assembly and the discharge assembly, the adjustment assembly includes a guide rail structure, a moving structure and a pressure roller structure, the moving structure is movably connected to the guide rail structure, and the pressure roller structure is connected to the moving structure.

[0008] In some embodiments, the adjustment component also includes a synchronous belt structure, which includes a synchronous belt and a pulley. The synchronous belt is sleeved on the pulley, the moving structure is connected to the synchronous belt, and an angular displacement detector is provided on the pulley.

[0009] In some embodiments, the movable structure includes a slider, a first connecting part and a second connecting part, the slider is movably connected to the guide rail structure, the first connecting part is connected to the slider, the second connecting part is connected to the first connecting part, the synchronous belt part is located between the first connecting part and the second connecting part, and the pressure roller structure is connected to the second connecting part.

[0010] In some embodiments, the guide rail structure includes a first mounting seat and a guide rail, the first mounting seat is connected to the frame assembly, the guide rail is connected to the first mounting seat, and the slider is connected to the guide rail.

[0011] In some embodiments, the pulley is connected to the first mounting seat, and the synchronous belt is arranged parallel to the guide rail.

[0012] In some embodiments, the first mounting base is rotatably connected to the frame assembly.

[0013] In some embodiments, the frame assembly includes a frame structure and a material placing rack structure, the frame structure is connected to the material placing rack structure, the material placing rack structure includes a second mounting seat, a fixing portion and a driving motor, the fixing portion is rotatably connected to the second mounting seat, and the output shaft of the driving motor is connected to the fixing portion.

[0014] In some embodiments, the unloading rack structure further includes an adjusting portion and a first conveying roller, the adjusting portion is rotatably connected to the second mounting seat, and the first conveying roller is rotatably connected to the adjusting portion.

[0015] In some embodiments, the feeding assembly includes a plurality of second conveying rollers, the plurality of second conveying rollers are rotatably connected to the frame assembly, and the soft film to be conveyed is partially disposed on the plurality of second conveying rollers.

[0016] In some embodiments, the discharging assembly includes a plurality of third conveying rollers, which are rotatably connected to the frame assembly, and the soft film to be conveyed is partially disposed on the plurality of third conveying rollers.

[0017] Through the above technical scheme, the film feeding speed feedback adjustment device provided by the present application, the soft film is pulled out from the roller, passes through the top of the feed component, the bottom of the adjustment component and the top of the discharge component in turn and extends into other equipment, and the pressure roller structure is arranged above the soft film to apply downward pressure to the soft film. When the discharge speed is greater than the feed speed, the soft film is tightened, and the pressure roller structure is subjected to the upward force from the soft film, and the pressure roller structure rises; when the discharge speed is less than the feed speed, the length of the soft film between the feed component and the discharge component increases, and the pressure roller structure descends under the action of gravity, providing downward pressure for the soft film to tighten the soft film. The relationship between the feed speed and the discharge speed can be judged by the height of the pressure roller structure in the vertical direction, and then the rotation speed of the soft film roller can be controlled to avoid film breakage. The technical scheme of the present application effectively solves the problem of film breakage caused by improper control of the rotation speed of the soft film roller in the film feeding process in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 The left side structural schematic diagram of the film feeding speed feedback regulating device disclosed in the first embodiment of the present application is shown;

[0020] Figure 2 Shows Figure 1 A schematic diagram of the motion path of the pressure roller structure of the film feeding speed feedback regulating device;

[0021] Figure 3 The structure diagram of the film feeding speed feedback regulating device disclosed in the second embodiment of the present application is shown;

[0022] Figure 4 Shows Figure 3 A schematic diagram of the partial enlarged structure of the film feeding speed feedback regulating device at position A;

[0023] Figure 5 Shows Figure 3 A schematic diagram of the partially enlarged structure of location B of the film feeding speed feedback adjustment device.

[0024] Description of reference numerals:

[0025] 10. Frame assembly; 11. Frame structure; 12. Unloading rack structure; 121. Second mounting seat; 122. Fixing part; 123. Driving motor; 124. Adjusting part; 125. First conveying roller; 20. Feeding assembly; 21. Second conveying roller; 30. Discharging assembly; 31. Third conveying roller; 40. Adjusting assembly; 41. Guide rail structure; 411. First mounting seat; 412. Guide rail; 42. Moving structure; 421. Sliding block; 422. First connecting part; 423. Second connecting part; 43. Pressing roller structure; 44. Synchronous belt structure; 441. Synchronous belt; 442. Pulley. DETAILED DESCRIPTION

[0026] The following is a further detailed description of the implementation methods of the present application in conjunction with the accompanying drawings and examples. The detailed descriptions of the following examples and the accompanying drawings are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application. The present application can be implemented in many different forms and is not limited to the specific embodiments of the present application, but includes all technical solutions within the scope of the claims.

[0027] The present application provides these embodiments to make the present application thorough and complete, and to fully express the scope of the present application to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0028] It should be noted that, in the description of this application, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0029] In addition, the words "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0030] It should also be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0031] All terms used in this application have the same meaning as those understood by those of ordinary skill in the art to which this application belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0032] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0033] like Figure 1 and Figure 2 As shown, the film feeding speed feedback adjustment device disclosed in the first embodiment of the present application includes: a frame assembly 10, a feed assembly 20, a discharge assembly 30 and an adjustment assembly 40, the soft film roller is arranged on the frame assembly 10, the feed assembly 20 is rotatably connected to the frame assembly 10, the discharge assembly 30 is rotatably connected to the frame assembly 10, the adjustment assembly 40 is located between the feed assembly 20 and the discharge assembly 30, the adjustment assembly 40 includes a guide rail structure 41, a movable structure 42 and a pressure roller structure 43, the movable structure 42 is movably connected to the guide rail structure 41, and the pressure roller structure 43 is connected to the movable structure 42.

[0034] The technical solution of the first embodiment is applied, and the soft film is pulled out from the roller, passes through the top of the feed assembly 20, the bottom of the adjustment assembly 40 and the top of the discharge assembly 30 in turn, and extends into other equipment. The pressure roller structure 43 is arranged above the soft film to apply downward pressure to the soft film. When the discharge speed is greater than the feed speed, the soft film is tightened, and the pressure roller structure 43 is subjected to the upward force from the soft film, and the pressure roller structure 43 rises; when the discharge speed is less than the feed speed, the length of the soft film between the feed assembly 20 and the discharge assembly 30 increases, and the pressure roller structure 43 descends under the action of gravity, providing downward pressure for the soft film to tighten the soft film. The height of the pressure roller structure 43 in the vertical direction can be used to determine the relationship between the feed speed and the discharge speed, and then control the rotation speed of the soft film roller to avoid film breakage. The technical solution of the first embodiment effectively solves the problem of film breakage caused by improper control of the rotation speed of the soft film roller during the soft film feeding process in the prior art.

[0035] like Figure 1 and Figure 2As shown, in the technical solution of the first embodiment, the frame assembly 10 includes a frame structure 11 and a material discharging rack structure 12, the frame structure 11 is connected to the material discharging rack structure 12, the material discharging rack structure 12 includes a second mounting seat 121, a fixing portion 122 and a driving motor 123, the fixing portion 122 is rotatably connected to the second mounting seat 121, and the output shaft of the driving motor 123 is connected to the fixing portion 122. The soft film roller is sleeved on the fixing portion 122, the driving motor 123 drives the fixing portion 122 to rotate, and the rotation of the fixing portion 122 drives the soft film on the roller to unfold and realize material discharging. The staff adjusts the rotation speed of the driving motor 123 by observing the height of the pressure roller structure 43 in the vertical direction, and then changes the feeding speed to avoid the problem that the discharging speed is greater than the feeding speed and causes the soft film to break. The fixing portion 122 uses an air expansion shaft, which includes a rotating shaft and an airbag. The rotating shaft is hollow inside and the side wall is a hollow structure, and the airbag is arranged inside the rotating shaft. When the airbag is not inflated, the outer surface of the airbag is inside the rotating shaft, and the staff can install or remove the soft film roller; after the soft film roller is sleeved on the rotating shaft, the airbag is inflated, the airbag expands, and the outer surface of the airbag partially extends out of the hollow structure and abuts against the inner wall of the soft film roller to fix the soft film roller. This fixing method ensures that the soft film roller rotates synchronously with the rotating shaft, avoiding the problem of slippage between the fixing part 122 and the soft film roller, which causes errors in the film release speed.

[0036] like Figure 1 and Figure 2 As shown, in the technical solution of the first embodiment, the unloading rack structure 12 also includes an adjusting portion 124 and a first conveying roller 125. The adjusting portion 124 is rotatably connected to the second mounting seat 121, and the first conveying roller 125 is rotatably connected to the adjusting portion 124. The soft film is firstly wound from the top of the first conveying roller 125 to the feeding assembly 20. The setting of the first conveying roller 125 can change the feeding angle at the feeding assembly 20 and the discharging angle of the soft film roller, so as to avoid the feeding angle or the discharging angle being too small, resulting in large local stress of the soft film and easy fracture. By rotating the second adjusting portion 124, the position of the first conveying roller 125 is changed to be suitable for the discharging of soft film rollers of different specifications.

[0037] like Figure 1 and Figure 2 As shown, in the technical solution of the first embodiment, the feed assembly 20 includes a plurality of second conveying rollers 21, which are rotatably connected to the frame assembly 10, and the soft film to be conveyed is partially arranged on the plurality of second conveying rollers 21. The second conveying rollers 21 are arranged to support the soft film, so that the friction force received by the soft film during the movement is a smaller roller friction, which reduces the running resistance and prevents the surface of the soft film from being scratched by the friction force, and further prevents the soft film from breaking. The arrangement of the plurality of second conveying rollers 21 makes the support force received by the soft film more uniform, and avoids the breakage caused by excessive local stress.

[0038] like Figure 1 and Figure 2 As shown, in the technical solution of the first embodiment, the discharging assembly 30 includes a plurality of third conveying rollers 31, which are rotatably connected to the frame assembly 10, and the soft film to be conveyed is partially arranged on the plurality of third conveying rollers 31. The third conveying rollers 31 are arranged to support the soft film, so that the friction force received by the soft film during the movement is a smaller roller friction, which reduces the running resistance and prevents the surface of the soft film from being scratched by the friction force, and further prevents the soft film from breaking. The arrangement of the plurality of third conveying rollers 31 makes the support force received by the soft film more uniform, and avoids the breakage caused by excessive local stress.

[0039] like Figures 3 to 5 As shown, the difference between the technical solution of the second embodiment and the technical solution of the first embodiment is that the adjustment component 40 also includes a synchronous belt structure 44, the synchronous belt structure 44 includes a synchronous belt 441 and a pulley 442, the synchronous belt 441 is sleeved on the pulley 442, the moving structure 42 is connected to the synchronous belt 441, and the pulley 442 is provided with an angular displacement detector. When the pressure roller structure 43 moves, it drives the moving structure 42 to move, the synchronous belt 441 moves with the movement of the moving structure 42, and drives the pulley 442 to rotate at the same time, and the angular displacement detector is used to monitor the angle and direction of rotation of the pulley 442. The film feeding speed feedback adjustment device also includes a control component, the angular displacement detector transmits the angular displacement signal to the control component, the control component determines the magnitude relationship between the feeding speed and the discharging speed according to the angle and direction of rotation of the pulley, when the discharging speed is greater than the feeding speed, the control component transmits the signal of increasing the speed to the driving motor 123, and when the discharging speed is less than the feeding speed, the control component transmits the signal of decreasing the speed to the driving motor 123. The angular displacement detector can be an encoder. The arrangement of the angular displacement detector and the control assembly can realize the automatic operation of the entire device, saving manpower and being more reliable.

[0040] like Figure 3 and Figure 4As shown, in the technical solution of the second embodiment, the movable structure 42 includes a slider 421, a first connection part 422 and a second connection part 423. The slider 421 is movably connected to the guide rail structure 41. The first connection part 422 is connected to the slider 421. The second connection part 423 is connected to the first connection part 422. The synchronous belt 441 is partially located between the first connection part 422 and the second connection part 423. The roller structure 43 is connected to the second connection part 423. The first connection part 422 and the second connection part 423 are both L-shaped plates, which clamp the synchronous belt 441 together. The synchronous belt 441 moves together with the first connection part 422 and the second connection part 423. The second connection part 423 has an opening and a fixing hole, and the opening is connected to the fixing hole. The roller structure 43 is inserted into the fixing hole. The setting of the opening facilitates the fixing and disassembly of the roller structure 43.

[0041] like Figure 3 and Figure 4 As shown, in the technical solution of the second embodiment, the guide rail structure 41 includes a first mounting seat 411 and a guide rail 412. The first mounting seat 411 is connected to the frame assembly 10, the guide rail 412 is connected to the first mounting seat 411, and the slider 421 is connected to the guide rail 412. The guide rail 412 guides the movement of the slider 421. The guide rail 412 has a slide groove, and the width of the slide groove decreases continuously in the direction from approaching to away from the first mounting seat 411. The slider 421 is consistent with the shape of the slide groove. The setting of this structure prevents the slider from moving out of the slide groove.

[0042] like Figure 3 and Figure 4 As shown, in the technical solution of the second embodiment, the pulley 442 is connected to the first mounting seat 411, and the synchronous belt 441 is arranged parallel to the guide rail 412. The synchronous belt structure 44 includes two pulleys 442, and the two pulleys 442 are respectively arranged at both ends of the guide rail 412. The synchronous belt 441 is arranged parallel to the guide rail 412 to ensure that the slider 421 and the synchronous belt 441 move in the same direction to avoid locking.

[0043] The difference between the technical solution of the third embodiment and the technical solution of the first embodiment is that the first mounting seat 411 is rotatably connected to the frame assembly 10. The guide rail 412 connected to the first mounting seat 411 rotates with the rotation of the first mounting seat 411, and the guide rail 412 can be set vertically or tilted, and the relationship between the feeding speed and the discharging speed can be determined according to the height change of the pressure roller structure 43.

[0044] From the above, it can be known that the film feeding speed feedback adjustment device provided in the present application includes: roller one (third conveying roller 31), roller two (third conveying roller 31) and roller three (pressure roller structure 43) are mounted on the mounting base plate (frame structure 11), roller two is fixed on the guide rail mounting plate (first mounting seat 411) by a mounting pad installed at its end, roller six (first conveying roller 125) is installed on the inclined plate (adjusting part 124), the inclined plate is fixed to the side of the fixed bracket (second mounting seat 121), the film material is wound on roller seven, and roller seven is mounted on the fixed bracket. The guide rail 412 is fixed on the guide rail mounting plate, the slider 421 is nested on the guide rail 412, the mounting plate 1 is connected to the slider 421, the mounting plate 2 is connected to the mounting plate 1 (together forming the first connecting part 422), the synchronous belt 441 is fixed to the mounting plate 2 through the synchronous belt pressure plate, the roller 3 is mounted on the mounting plate 1, the synchronous belt 441 is covered on the synchronous pulley (pulley 442), the synchronous pulley is fixed on the rotating shaft, the rotating shaft is connected to the encoder (angular displacement detector) through a coupling, the bottom of the encoder is installed on the encoder mounting plate, and the encoder mounting plate is fixed on the base. The specific operation process of the film feeding speed feedback adjustment device is as follows: the film material is wound on roller seven, and is wound around roller six, roller five (second conveying roller 21), roller four (second conveying roller 21), roller three (pressure roller structure 43), roller two (third conveying roller 31) and roller one (third conveying roller 31) in sequence during the conveying process; roller three can move up and down along the guide rail 412 through the slider 421. During the conveying process of the film material, when the speed of the end of the film material is too fast, the film material tension drives roller three to rise, and at the same time, the synchronous belt 441 drives the synchronous pulley to rotate, and the synchronous pulley then drives the encoder to rotate through the rotating shaft and the coupling. When the rotation angle of the encoder exceeds the set limit When the speed of roller seven increases, the tension of the film material decreases, and roller three falls; similarly, when the speed of the end of the film material is too slow, the film material relaxes and drives roller three to fall, and at the same time, the synchronous belt 441 drives the synchronous pulley to rotate in the opposite direction, and the synchronous pulley then drives the encoder to rotate in the opposite direction through the rotating shaft and the coupling. When the reverse rotation angle of the encoder exceeds the set limit, the speed of roller seven decreases, the film material is tensioned, and roller three rises; through the angle change of the encoder, the speed of roller seven changes in real time, so that the rotation angle of the encoder is always kept within the set upper and lower limit range, ensuring that roller three is always kept within the upper and lower limit heights, and finally ensuring that the tension on the film material is moderate and not broken. This application adopts a linear slide rail and synchronous belt structure to convert the linear motion of the roller into the rotational motion of the encoder, which can accurately control the film feeding speed; a multi-roller combination is used to feed the film to ensure stable film material transportation.

[0045] So far, the embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution of the present application.

[0046] Although some specific embodiments of the present application have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A film feeding speed feedback regulating device, characterized in that: include: A frame assembly (10), the soft film drum being arranged on the frame assembly (10); A feed assembly (20), the feed assembly (20) being rotatably connected to the frame assembly (10); A discharging assembly (30), the discharging assembly (30) being rotatably connected to the frame assembly (10); An adjusting component (40), wherein the adjusting component (40) is located between the feeding component (20) and the discharging component (30), and the adjusting component (40) comprises a guide rail structure (41), a moving structure (42) and a pressure roller structure (43), wherein the moving structure (42) is movably connected to the guide rail structure (41), and the pressure roller structure (43) is connected to the moving structure (42).

2. The film feeding speed feedback regulating device according to claim 1, characterized in that: The adjustment component (40) further comprises a synchronous belt structure (44), wherein the synchronous belt structure (44) comprises a synchronous belt (441) and a pulley (442), wherein the synchronous belt (441) is sleeved on the pulley (442), the movable structure (42) is connected to the synchronous belt (441), and an angular displacement detector is arranged on the pulley (442).

3. The film feeding speed feedback regulating device according to claim 2, characterized in that: The movable structure (42) comprises a slider (421), a first connecting part (422) and a second connecting part (423); the slider (421) is movably connected to the guide rail structure (41); the first connecting part (422) is connected to the slider (421); the second connecting part (423) is connected to the first connecting part (422); the synchronous belt (441) is partially located between the first connecting part (422) and the second connecting part (423); and the pressure roller structure (43) is connected to the second connecting part (423).

4. The film feeding speed feedback regulating device according to claim 3, characterized in that: The guide rail structure (41) comprises a first mounting seat (411) and a guide rail (412); the first mounting seat (411) is connected to the frame assembly (10); the guide rail (412) is connected to the first mounting seat (411); and the slider (421) is connected to the guide rail (412).

5. The film feeding speed feedback regulating device according to claim 4, characterized in that: The pulley (442) is connected to the first mounting seat (411), and the synchronous belt (441) is arranged parallel to the guide rail (412).

6. The film feeding speed feedback regulating device according to claim 4, characterized in that: The first mounting seat (411) is rotatably connected to the frame assembly (10).

7. The film feeding speed feedback regulating device according to claim 1, characterized in that: The frame assembly (10) comprises a frame structure (11) and a material discharging frame structure (12), wherein the frame structure (11) is connected to the material discharging frame structure (12), and the material discharging frame structure (12) comprises a second mounting seat (121), a fixing portion (122) and a driving motor (123), wherein the fixing portion (122) is rotatably connected to the second mounting seat (121), and an output shaft of the driving motor (123) is connected to the fixing portion (122).

8. The film feeding speed feedback regulating device according to claim 7, characterized in that: The material placing rack structure (12) further comprises an adjusting portion (124) and a first conveying roller (125), wherein the adjusting portion (124) is rotatably connected to the second mounting seat (121), and the first conveying roller (125) is rotatably connected to the adjusting portion (124).

9. The film feeding speed feedback regulating device according to any one of claims 1 to 8, characterized in that: The feeding assembly (20) comprises a plurality of second conveying rollers (21), the plurality of second conveying rollers (21) are rotatably connected to the frame assembly (10), and the soft film to be conveyed is partially arranged on the plurality of second conveying rollers (21).

10. The film feeding speed feedback regulating device according to claim 9, characterized in that: The discharging assembly (30) comprises a plurality of third conveying rollers (31), the plurality of third conveying rollers (31) are rotatably connected to the frame assembly (10), and the soft film to be conveyed is partially arranged on the plurality of third conveying rollers (31).

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