Blue film feeding device and film coating equipment

Abstract

The utility model relates to a blue film feeding device and film coating equipment, and belongs to the technical field of battery packaging, the blue film feeding device comprises an equipment side plate, the equipment side plate is provided with an air expansion shaft used for discharging and a sliding way located on one side of the air expansion shaft, the air expansion shaft is sleeved with a winding drum, and the surface of the winding drum is wound with a blue film; the detection assembly comprises a mounting seat and a color code sensor, the mounting seat is slidably connected with the slide way, the color code sensor is mounted on the mounting seat and used for distinguishing the blue film and the winding drum, and the mounting seat can slide along the slide way to be close to or away from the inflatable shaft. According to the device, the white exposure area on the periphery of the winding drum can be recognized through the color code sensor, then a signal is transmitted to the controller on the device, the device is shut down in time, film collapse caused by insufficient incoming blue film length is avoided, and the blue film is fully utilized. And the mounting seat can slide along the slide way to be far away from the inflatable shaft, so that the operation space is reserved, and the problem that the color code sensor and the mounting seat obstruct the operation when the blue film is produced and replaced is solved.

Description

Technical Field

[0001] The present application relates to the technical field of battery packaging, and in particular to a blue film feeding device and a film coating device. Background Art

[0002] The blue film of the square hard shell battery pack refers to a layer of blue protective film on the outer surface of the battery. The blue film is usually wrapped on the surface of the battery before the battery is shipped. It can ensure good insulation of the outer surface of the battery, so it is an indispensable part of the battery production process. The blue film on the battery pack can protect the battery - protect the battery surface from scratches and electrolyte corrosion - and also make the appearance of the battery more beautiful.

[0003] In the related technology, the number of batteries that can be wrapped by a single roll of blue film on the wrapping equipment is calculated by product engineers. The total length of the single roll of blue film is divided by the length of blue film required for wrapping a single battery, and the number of batteries that can be wrapped by a roll of blue film is calculated. After this data is given to the site, it is set on the wrapping count of the wrapping machine.

[0004] However, if the counting method is completely dependent on the coating machine, if the size of a single roll of blue film from the supplier is insufficient, it will cause film breakage. It will take 12 to 18 minutes to re-thread the blue film, resulting in a waste of production capacity. If there is film breakage on site and the machine is not stopped in time, the count of a single roll of blue film will be relatively reduced, resulting in a waste of blue film. Summary of the invention

[0005] The embodiments of the present application provide a blue film feeding device and a film coating device to solve the problem of film collapse caused by insufficient blue film length and the problem of waste caused by excess blue film in the related art.

[0006] In a first aspect, an embodiment of the present application provides a blue film feeding device, comprising:

[0007] The side plate of the equipment is provided with an air shaft for discharging materials and a slideway located on one side of the air shaft, and the air shaft is provided with a reel with a blue film wound on the surface;

[0008] The detection component comprises a mounting seat slidably connected to the slideway, and a color mark sensor mounted on the mounting seat and used to distinguish between blue film and roll. The mounting seat can slide along the slideway to approach or move away from the inflatable shaft.

[0009] On the first aspect, in some embodiments, the slide extends in a vertical direction, and a first limiting member for supporting the mounting seat is installed on the side panel of the equipment. When the first limiting member supports the mounting seat, the color mark sensor faces the outer peripheral surface of the roll.

[0010] In the first aspect, in some embodiments, a second limiting member is installed on the side panel of the device, and the second limiting member includes an L-shaped block rotatably connected to the side panel of the device, and a tension spring arranged on the side panel of the device for pulling the L-shaped block so that the L-shaped block can support the mounting seat.

[0011] In the first aspect, in some embodiments, the mounting seat includes a slide seat slidably connected to the slideway, and a horizontal plate connected to the slide seat and for mounting the color mark sensor, and an angle code is connected between the horizontal plate and the slide seat.

[0012] In a first aspect, in some embodiments, the horizontal plate is provided with an adjustment component for adjusting the pitch angle and the horizontal angle of the color mark sensor.

[0013] In the first aspect, in some embodiments, a first arc hole is provided through the horizontal plate, the adjustment assembly includes a mounting plate rotatably connected to the horizontal plate and for mounting the color mark sensor, and the first arc hole is fixedly connected to the mounting plate by fasteners.

[0014] In the first aspect, in some embodiments, two second circular arc holes are coaxially arranged and symmetrically distributed on the mounting plate, and the two second circular arc holes are fixedly connected to the color mark sensor by fasteners.

[0015] On the first aspect, in some embodiments, a monitoring component for detecting the rotation state of the inflatable shaft is installed on the side panel of the device, and the monitoring component includes a plurality of connecting plates that are arranged around the end of the inflatable shaft and can rotate circumferentially with the inflatable shaft, and slot-type photoelectric sensors extending to both sides of the connecting plates.

[0016] In the first aspect, in some embodiments, a limit assembly for limiting the axial insertion position of the reel is installed on the side panel of the device, and the limit assembly includes a limit plate and a driving member for driving the limit plate to move axially along the inflatable shaft.

[0017] In a second aspect, an embodiment of the present application provides a film coating device, comprising:

[0018] The blue film feeding device described in any of the above items.

[0019] The beneficial effects of the technical solution provided by this application include:

[0020] The embodiment of the present application provides a blue film feeding device and a coating device, wherein a side panel of the equipment is provided with an inflatable shaft for discharging materials and a slideway located on one side of the inflatable shaft, and a reel with a blue film wrapped on the surface is mounted on the inflatable shaft; a detection component includes a mounting seat slidably connected to the slideway, and a color mark sensor mounted on the mounting seat and used to distinguish between the blue film and the reel, and the mounting seat can slide along the slideway to approach or move away from the inflatable shaft.

[0021] Therefore, the color mark sensor can identify the exposed white area on the outer periphery of the roll. When the blue film on the roll is almost used up, a signal is transmitted to the controller on the equipment to stop the equipment in time, thereby avoiding the problem of film collapse caused by insufficient blue film length. At the same time, the blue film can be fully utilized to avoid waste caused by excessive blue film surplus on the roll. In addition, the mounting seat can be slid along the slide to keep the mounting seat away from the air shaft, thereby making room for operation, solving the problem that the color mark sensor and mounting seat will hinder the operation when replacing the blue film in production. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments 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 creative work.

[0023] Figure 1 A schematic diagram of the structure of a blue film feeding device provided in an embodiment of the present application;

[0024] Figure 2 A schematic diagram of the structure of a second position-limiting member provided in an embodiment of the present application;

[0025] Figure 3 A schematic diagram of the structure of the mounting base provided in the embodiment of the present application;

[0026] Figure 4 A schematic diagram of the structure of the monitoring component provided in an embodiment of the present application.

[0027] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0028] 1. Equipment side panel; 2. Inflatable shaft; 3. Slide; 4. Blue film; 5. Reel; 6. Mounting seat; 61. Slide; 62. Horizontal plate; 621. First arc hole; 63. Angle code; 7. Color mark sensor; 8. First limiter; 9. Second limiter; 91. L-shaped block; 92. Tension spring; 10. Mounting plate; 11. Second arc hole; 12. Connecting piece; 13. Slot-type photoelectric sensor; 14. Limiter plate; 15. Driving member. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0030] The embodiments of the present application provide a blue film feeding device and a film coating device to solve the problem of film collapse caused by insufficient blue film length and the problem of waste caused by excess blue film in the related art.

[0031] See also Figures 1 to 4 As shown, the first aspect of the embodiment of the present application provides a blue film feeding device, comprising:

[0032] The side plate 1 of the equipment is provided with an inflatable shaft 2 for discharging materials and a slideway 3 located on one side of the inflatable shaft 2. The inflatable shaft 2 is provided with a reel 5 with a blue film 4 wound on its surface;

[0033] The detection component includes a mounting seat 6 slidably connected to the slide 3, and a color mark sensor 7 mounted on the mounting seat 6 and used to distinguish the blue film 4 and the roll 5. The mounting seat 6 can slide along the slide 3 to approach or move away from the inflatable shaft 2.

[0034] The blue film feeding device of the embodiment of the present application uses a color mark sensor 7 to determine whether the blue film 4 on the roll 5 is used up. Since the blue film 4 and the roll 5 have different colors, the color mark sensor 7 distinguishes the blue film 4 from the roll 5 by detecting the color in the sensing area.

[0035] For example, the roll 5 in this embodiment is white, and the blue film 4 is blue. The color mark sensor 7 is fixedly mounted on the mounting seat 6, and the mounting seat 6 is slidably connected to the slideway 3 on the side plate 1 of the device. By moving the mounting seat 6 to a suitable position, the color mark sensor 7 is directed toward the outer peripheral surface of the roll 5.

[0036] When the blue film 4 is released to expose the outer circumference of the roll 5 and has not completely detached from the roll 5, the color mark sensor 7 detects the white color of the roll 5 and transmits a signal to the controller on the equipment to stop the equipment in time, thereby avoiding the film collapse problem caused by insufficient length of the blue film 4. At the same time, the blue film 4 can be fully utilized to avoid waste caused by excessive excess blue film 4 on the roll 5.

[0037] It should be noted that in this embodiment, an inflatable shaft 2 is used to fix the reel 5, so as to facilitate the replacement of the film roll. Since the radial thickness of the blue film 4 on the new film roll is much larger than the reel 5, a certain amount of space is required for personnel to operate the replacement. The mounting seat 6 can be slid along the slide 3 to keep the mounting seat 6 away from the inflatable shaft 2, thereby solving the problem that the color mark sensor 7 and the mounting seat 6 will hinder the operation when replacing the blue film 4 during production.

[0038] Exemplarily, the slide 3 in this embodiment can be arranged horizontally, vertically or diagonally if space on the equipment permits, and a damping plate in contact with the slide 3 can be fixed on the mounting seat 6, so that the mounting seat 6 can stay at any position on the slide 3 under the action of friction.

[0039] In some optional embodiments, see Figures 1 to 4 As shown, an embodiment of the present application provides a blue film feeding device, in which the slide 3 extends in the vertical direction, and a first limit member 8 for supporting the mounting seat 6 is installed on the side panel 1 of the equipment. When the first limit member 8 supports the mounting seat 6, the color mark sensor 7 faces the outer peripheral surface of the roll 5.

[0040] A slide 3 is fixedly installed on the equipment side panel 1 of the embodiment of the present application, and the slide 3 extends in the vertical direction. A first limit member 8 is installed on the equipment side panel 1. The first limit member 8 can support the mounting seat 6 so that the mounting seat 6 is kept in position so that the color mark sensor 7 faces the outer peripheral surface of the reel 5.

[0041] Exemplarily, the first limit member 8 is a fixed block, and a plurality of mounting holes are provided on the equipment side panel 1 at intervals in the vertical direction. The fixed block is connected to the mounting holes by fasteners so that the fixed block is fixed on the equipment side panel 1. The fasteners can change the height position of the fixed block by adapting to the mounting holes in different positions, so that the mounting seat 6 can be supported at a suitable height position.

[0042] In some optional embodiments, see Figures 1 to 4 As shown, an embodiment of the present application provides a blue film feeding device, on which a second limit member 9 is installed on the equipment side panel 1. The second limit member 9 includes an L-shaped block 91 rotatably connected to the equipment side panel 1, and a tension spring 92 arranged on the equipment side panel 1 for pulling the L-shaped block 91 so that the L-shaped block 91 can support the mounting seat 6.

[0043] The second position-limiting member 9 of the embodiment of the present application includes an L-shaped block 91 and a tension spring 92, and the tension spring 92 can pull the L-shaped block 91 so that the end of the L-shaped block 91 supports the mounting seat 6. Exemplarily, in this embodiment, the L-shaped block 91 is located above the first position-limiting member 8, and the corner of the L-shaped block 91 is rotatably connected to the device side plate 1 through a rotating shaft. The device side plate 1 is installed with a tension spring 92, and the top end of the tension spring 92 is hooked on the device side plate 1, and the bottom end is hooked on the L-shaped block 91. A handle perpendicular to the device side plate 1 is also fixed on the L-shaped block 91.

[0044] The L-shaped block 91 can be pulled by the tension spring 92 so that the end of the L-shaped block 91 can support the mounting seat 6, thereby keeping the mounting seat 6 above the first limit piece 8, thereby facilitating the replacement of the roll film on the inflatable shaft 2. When the mounting seat 6 needs to be reset to the first limit piece 8, the L-shaped block 91 is driven to rotate by the handle so that the end of the L-shaped block 91 is downwardly separated from the mounting seat 6, so that the mounting seat 6 can slide down and reset.

[0045] In some optional embodiments, see Figures 1 to 4 As shown, an embodiment of the present application provides a blue film feeding device, wherein the mounting seat 6 of the blue film feeding device includes a slide seat 61 slidably connected to the slideway 3, and a horizontal plate 62 connected to the slide seat 61 and for mounting the color mark sensor 7, and an angle code 63 is connected between the horizontal plate 62 and the slide seat 61.

[0046] The mounting seat 6 of the embodiment of the present application includes a slide 61 and a horizontal plate 62. The slide 61 and the horizontal plate 62 are fixedly connected by an angle code 63 to ensure a stable connection. The extension direction of the horizontal plate 62 and the air inflation shaft is the same, which makes it convenient to install the color mark sensor 7 on the horizontal plate 62 to face the outer peripheral surface of the reel 5.

[0047] In some optional embodiments, see Figures 1 to 4 As shown, the embodiment of the present application provides a blue film feeding device, on which a horizontal plate 62 is provided with an adjustment component for adjusting the pitch angle and horizontal angle of the color mark sensor 7 .

[0048] The adjustment component of the embodiment of the present application can adjust the pitch angle and horizontal angle of the color mark sensor 7 to adjust the color mark sensor 7 to a suitable orientation, so that when the color mark sensor 7 detects the white color of the roll 5, the blue film 4 has not completely separated from the roll 5 to cause film collapse.

[0049] Exemplarily, the adjustment assembly can be two interconnected rotary cylinders, one rotary cylinder serves as a rotary base to adjust the horizontal orientation of the color mark sensor 7 , and the rotating surface of the other rotary cylinder is arranged perpendicular to the horizontal plane to adjust the pitch orientation of the color mark sensor 7 .

[0050] In some optional embodiments, see Figures 1 to 4As shown, an embodiment of the present application provides a blue film feeding device, a horizontal plate 62 of the blue film feeding device is penetrated with a first arc hole 621, an adjustment component includes a mounting plate 10 rotatably connected to the horizontal plate 62 and for mounting a color mark sensor 7, and the first arc hole 621 is fixedly connected to the mounting plate 10 by passing fasteners.

[0051] The horizontal plate 62 of the embodiment of the present application is provided with a first arc hole 621, and a rotating shaft is installed at the center of the first arc hole 621. The mounting plate 10 is rotatably connected to the horizontal plate 62 through the rotating shaft. The mounting plate 10 is perpendicular to the horizontal plate 62, and is fixedly connected to the horizontal plate 62 by fasteners passed through the first arc hole 621. By loosening the fasteners, the mounting plate 10 can be rotated along the extension direction of the first arc hole 621, and the position of the mounting plate 10 can be swung and adjusted on the horizontal plate 62. When the color mark sensor 7 on the mounting plate 10 is facing in a suitable direction, the position of the mounting plate 10 can be fixed by tightening the fasteners.

[0052] In some optional embodiments, see Figures 1 to 4 As shown, an embodiment of the present application provides a blue film feeding device, on which a mounting plate 10 is coaxially provided with two symmetrically distributed second arc holes 11, and the two second arc holes 11 are fixedly connected to the color mark sensor 7 by fasteners.

[0053] The mounting plate 10 of the embodiment of the present application is coaxially provided with two symmetrically distributed second arc holes 11. The color mark sensor 7 is fixedly connected by respectively piercing fasteners in the two second arc holes 11. By loosening the fasteners at the two positions, the mounting plate 10 can be rotated along the extension direction of the second arc holes 11 to adjust the direction of the color mark sensor 7 in pitch. When the color mark sensor 7 is in a suitable direction, the position of the color mark sensor 7 can be fixed by tightening the two fasteners.

[0054] In some optional embodiments, see Figures 1 to 4 As shown, an embodiment of the present application provides a blue film feeding device, on which a monitoring component for detecting the rotation state of the inflatable shaft 2 is installed. The monitoring component includes a plurality of connecting pieces 12 which are arranged around the end of the inflatable shaft 2 and can rotate circumferentially with the inflatable shaft 2, and a slot-shaped photoelectric sensor 13 extending to both sides of the connecting piece 12.

[0055] The monitoring component of the embodiment of the present application is used to detect the rotation state of the inflatable shaft 2 and determine whether the inflatable shaft 2 is passively rotating during material discharge. If the inflatable shaft 2 stops rotating during the working period, it indicates that film collapse may occur and the machine needs to be stopped for inspection.

[0056] Exemplarily, the monitoring component of this embodiment includes a connecting piece 12 and a slot-type photoelectric sensor 13. The connecting piece 12 is fixedly connected to the circumferential side of the end of the inflatable shaft 2 and is distributed in a ring-shaped and equidistant pattern. The connecting piece 12 can rotate circumferentially with the inflatable shaft 2. The slot-type photoelectric sensor 13 is installed on the side panel 1 of the equipment. When the connecting piece 12 rotates circumferentially, it passes through the detection slot of the slot-type photoelectric sensor 13 in sequence.

[0057] When the inflatable shaft 2 rotates, a number of connecting pieces 12 pass through the detection slots of the slot-type photoelectric sensor 13 in sequence, and the slot-type photoelectric sensor 13 continuously and regularly outputs signals; when the inflatable shaft 2 stops rotating, if the connecting piece 12 is located in the detection slot of the slot-type photoelectric sensor 13, the slot-type photoelectric sensor 13 remains in a state of continuously outputting signals; otherwise, the slot-type photoelectric sensor 13 remains in a state of disconnection and no signal output; therefore, whether the inflatable shaft 2 rotates can be judged by the signal state fed back by the slot-type photoelectric sensor 13.

[0058] In some optional embodiments, see Figures 1 to 4 As shown, an embodiment of the present application provides a blue film feeding device, on which a limit assembly for limiting the axial fitting position of the reel 5 is installed, and the limit assembly includes a limit plate 14 and a driving member 15 for driving the limit plate 14 to move axially along the inflatable shaft 2.

[0059] A limiting assembly is installed on the side plate 1 of the device in the embodiment of the present application. The limiting assembly includes a limiting plate 14 and a driving member 15. The driving member 15 can drive the limiting plate 14 to move axially along the inflatable shaft 2, thereby limiting the axial mounting position of the rolled film on the inflatable shaft 2.

[0060] Exemplarily, the driving member 15 is a cylinder, which is fixed to the side plate 1 of the equipment through a horizontal connecting plate. The telescopic end of the cylinder is fixedly connected to a limit plate 14 parallel to the side plate 1 of the equipment. When the film is rolled onto the inflatable shaft 2, after the roll 5 of the film is pushed into place, the blue film 4 on the roll 5 abuts against the surface of the limit plate 14, and the roll 5 is tightened and fixed by the inflatable shaft 2, thereby facilitating the film rolling. At the same time, after the film is rolled into place, the cylinder can drive the limit plate 14 away from the film to avoid the limit plate 14 interfering with the unwinding.

[0061] See also Figures 1 to 4 As shown, the second aspect of the embodiment of the present application provides a coating device, including:

[0062] The blue film feeding device of any one of the above embodiments.

[0063] The coating equipment of the embodiment of the present application uses the blue film feeding device of any of the above-mentioned embodiments, and can distinguish between the blue film 4 and the roll 5. When the blue film 4 on the roll 5 is almost used up, a signal is transmitted to the controller on the equipment to stop the equipment in time, thereby avoiding the film collapse problem caused by insufficient length of the blue film 4. At the same time, the blue film 4 can be fully utilized to avoid waste caused by excessive excess blue film 4 on the roll 5.

[0064] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate positions or positions based on the positions or positions shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present 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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0065] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0066] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A blue film feeding device, characterized in that: include: The side plate (1) of the equipment is provided with an inflatable shaft (2) for discharging materials and a slideway (3) located on one side of the inflatable shaft (2); the inflatable shaft (2) is provided with a reel (5) with a blue film (4) wound on its surface; The detection component comprises a mounting seat (6) slidably connected to the slideway (3), and a color mark sensor (7) mounted on the mounting seat (6) and used to distinguish between the blue film (4) and the roll (5); the mounting seat (6) can slide along the slideway (3) to approach or move away from the inflatable shaft (2).

2. The blue film feeding device according to claim 1, characterized in that: The slideway (3) extends in a vertical direction, and a first stopper (8) for supporting the mounting seat (6) is installed on the side plate (1) of the device. When the first stopper (8) supports the mounting seat (6), the color mark sensor (7) faces the outer peripheral surface of the reel (5).

3. The blue film feeding device according to claim 1, characterized in that: A second limiting member (9) is installed on the equipment side plate (1), and the second limiting member (9) comprises an L-shaped block (91) rotatably connected to the equipment side plate (1), and a tension spring (92) provided on the equipment side plate (1) and used for pulling the L-shaped block (91) so that the L-shaped block (91) can support the mounting seat (6).

4. The blue film feeding device according to claim 1, characterized in that: The mounting seat (6) comprises a slide seat (61) slidably connected to the slideway (3), and a horizontal plate (62) connected to the slide seat (61) and for mounting the color mark sensor (7), wherein an angle code (63) is connected between the horizontal plate (62) and the slide seat (61).

5. The blue film feeding device according to claim 4, characterized in that: The horizontal plate (62) is provided with an adjustment component for adjusting the pitch angle and horizontal angle of the color mark sensor (7).

6. The blue film feeding device according to claim 5, characterized in that: The horizontal plate (62) is provided with a first arc hole (621) extending therethrough, the adjustment assembly comprises a mounting plate (10) rotatably connected to the horizontal plate (62) and for mounting the color mark sensor (7), and the first arc hole (621) is fixedly connected to the mounting plate (10) by passing a fastener therethrough.

7. The blue film feeding device according to claim 6, characterized in that: Two second circular arc holes (11) are coaxially arranged on the mounting plate (10) and are symmetrically distributed. The two second circular arc holes (11) are fixedly connected to the color mark sensor (7) by passing fasteners therethrough.

8. The blue film feeding device according to claim 1, characterized in that: A monitoring component for detecting the rotational state of the inflatable shaft (2) is installed on the side plate (1) of the device, and the monitoring component comprises a plurality of connecting pieces (12) arranged around the end of the inflatable shaft (2) and capable of rotating circumferentially with the inflatable shaft (2), and slot-shaped photoelectric sensors (13) extending to both sides of the connecting pieces (12).

9. The blue film feeding device according to claim 1, characterized in that: A limiting assembly for limiting the axial insertion position of the reel (5) is installed on the side plate (1) of the device, and the limiting assembly comprises a limiting plate (14) and a driving member (15) for driving the limiting plate (14) to move axially along the inflatable shaft (2).

10. A film coating device, characterized in that: include: The blue film feeding device according to any one of claims 1 to 9.

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