Diaphragm unwinding and splicing device

Abstract

The utility model relates to the technical field of unwinding and tape connecting devices, and discloses a diaphragm unwinding and tape connecting device which comprises an unwinding mechanism, a tape connecting mechanism, a tension control mechanism and a cutter mechanism. Wherein the unwinding mechanism, the belt connecting mechanism and the tension control mechanism are arranged in sequence and form a diaphragm belt path. Through the design of the positions and structures of the unwinding structure, the tape splicing mechanism and the tension control mechanism, the effects of unwinding and automatic tape splicing are achieved. Particularly, the space utilization rate of the diaphragm unwinding and tape connecting device is improved, the device structure is simplified, the tape walking speed and yield are improved, the possibility that the diaphragm deviates from the point position is reduced, and the precision is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of unwinding and splicing devices, specifically relates to a diaphragm unwinding and splicing device Background Art

[0002] With the widespread application of lithium batteries, a complete and mature process flow has been established from manufacturing to production. Among them, the stable, continuous, and uniform conveyance of the diaphragm, a key component of lithium batteries, is crucial to lithium battery production. This is because diaphragm unwinding not only affects lithium battery production efficiency but also the performance and quality of the batteries produced. Furthermore, the lithium battery production process faces the issue of diaphragm rewinding. When a diaphragm roll is used up and a new diaphragm roll is connected, the diaphragm replacement and splicing efficiency have a direct impact on lithium battery production efficiency.

[0003] Traditionally, the method for changing and splicing membrane rolls involves manual splicing. This process requires pausing the equipment, manually cutting the membrane, removing the used membrane roll, loading the new membrane roll, and docking it with the new membrane roll. This method is not only inefficient but also prone to human error. Furthermore, the existing membrane splicing and rewinding devices have complex structures, resulting in a large overall size for the membrane unwinding and splicing equipment, as well as multiple rollers, which in turn affects the smoothness of the membrane unwinding process.

[0004] Therefore, how to provide a diaphragm unwinding and splicing device with high space utilization and high speed and accuracy is an urgent problem to be solved by relevant technical personnel. Utility Model Content

[0005] In order to solve the deficiencies of the prior art, the utility model provides a diaphragm unwinding and splicing device, which achieves high space utilization and high-speed and precise tape running by limiting the position and structure of the unwinding mechanism and the splicing mechanism.

[0006] The technical effects to be achieved by the present invention are achieved through the following technical aspects:

[0007] In a first aspect, the utility model provides a diaphragm unwinding and splicing device, comprising

[0008] The unwinding mechanism is used to drive the unwinding of the diaphragm and includes two unwinding assemblies arranged in the vertical direction. The splicing mechanism is used to splice and change the tapes between different diaphragms and includes a vertical screw module and a splicing assembly. The splicing assembly moves between different unwinding assemblies under the action of the vertical screw module.

[0009] a tension control mechanism for controlling the tension of the diaphragm, comprising a tension swing arm assembly and a tension detection roller assembly; and

[0010] A cutter mechanism, used for cutting the spliced ​​diaphragm, is provided on one side of the splicing mechanism;

[0011] The unwinding mechanism, the belt connecting mechanism and the tension control mechanism are arranged in sequence to form a diaphragm belt path.

[0012] In some embodiments, the splicing assembly includes a DD motor and a diaphragm roller portion, the diaphragm roller portion includes two parallel rollers, the diaphragm passes around different rollers, and the diaphragm roller portion rotates under the drive of the DD motor.

[0013] In some embodiments, a roller gap is provided between different rollers;

[0014] In the unwinding state, the unwinding component is divided into a working unwinding component and a standby unwinding component;

[0015] Assume that the rollers arranged along the extension direction of the diaphragm belt path are the first roller and the second roller in sequence;

[0016] The diaphragm discharge end of the working unwinding assembly is sequentially passed through the side of the first roller away from the working unwinding assembly, the roller gap and the side of the second roller close to the working unwinding assembly.

[0017] In some embodiments, in the unwinding state, the tape splicing mechanism is located in the middle between the working unwinding assembly and the standby unwinding assembly;

[0018] In the splicing state, the splicing mechanism is close to the standby unwinding assembly, and the first roller abuts against the standby unwinding assembly to achieve splicing of the diaphragm between the working unwinding assembly and the standby unwinding assembly.

[0019] In some embodiments, the cutter mechanism is arranged on a side of the belt connecting mechanism that extends away from the diaphragm belt path.

[0020] In some embodiments, the belt connecting mechanism further includes a belt connecting drive motor and a connecting plate, the belt connecting assembly is movably connected to the vertical screw module through the connecting plate, and the belt connecting drive motor drives the connecting plate and the belt connecting mechanism to move in the vertical direction.

[0021] In some embodiments, a diaphragm buffer mechanism is further included, and the diaphragm buffer mechanism is arranged after the tension control mechanism.

[0022] In some embodiments, a magnetic rod assembly is further provided between the tension rocker assembly and the tension detection roller assembly for removing magnetic substances on the diaphragm.

[0023] In some embodiments, along the diaphragm belt path, the diaphragm buffer mechanism is also connected to a plasma wind component for removing static electricity from the diaphragm.

[0024] In some embodiments, the belt connecting mechanism is further connected to a deviation-correcting electric cylinder mechanism.

[0025] In summary, the present invention has at least the following advantages:

[0026] 1. The utility model provides a diaphragm unwinding and splicing device, which has the characteristics of high space utilization, high-speed and precise tape running. Among them, the unwinding mechanism, the splicing mechanism and the tension control mechanism cooperate to achieve the effects of unwinding and automatic splicing. In particular, the unwinding mechanism adopts a vertically arranged unwinding component, and the splicing mechanism adopts a splicing component that moves in the vertical direction, which is beneficial to reducing the number of rollers and the influence of the weight of the diaphragm roll on the diaphragm unwinding. At the same time, the vertically arranged unwinding mechanism and the splicing mechanism are beneficial to further improve the space utilization, while taking into account the unwinding and splicing functions, the tape running speed and yield of the diaphragm unwinding and splicing device are improved, the possibility of the diaphragm deviating from the point is reduced, and the accuracy is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural schematic diagram of the diaphragm unwinding and splicing device of Example 1 of the present utility model.

[0028] Figure 2 This is a structural schematic diagram of the belt splicing mechanism of Example 1 of the present utility model.

[0029] Figure 3 This is a structural diagram of the unwinding state in the initial state of Example 1 of the present utility model.

[0030] Figure 4 This is a structural diagram of the tape-joined state of Example 1 of the present utility model.

[0031] Figure 5 This is a schematic diagram of the structure of Example 1 of the present invention after cutting.

[0032] Figure 6 This is a structural schematic diagram of the next unwinding state after the tape is spliced ​​in Example 1 of the present invention.

[0033] Figure 7 This is a structural schematic diagram of the diaphragm unwinding and splicing device of Example 2 of the present utility model.

[0034] Figure 8 This is a structural schematic diagram of the diaphragm unwinding and splicing device of Example 3 of the present utility model.

[0035] Markings in the figure:

[0036] 1. Frame; 10. Diaphragm; 100. Diaphragm unwinding and splicing device;

[0037] 2. Unwinding mechanism; 210. Unwinding assembly; 211. Unwinding shaft; 21. Working unwinding assembly; 22. Spare unwinding assembly;

[0038] 3. Belt splicing mechanism; 310. Vertical screw module; 311. Belt splicing drive motor; 312. Connecting plate; 320. Belt splicing assembly; 31. DD motor; 32. Diaphragm roller unit; 33. Rollers; 331. First roller; 332. Second roller;

[0039] 4. Tension control mechanism; 41. Tension swing arm assembly; 42. Tension detection roller assembly;

[0040] 5. Cutter mechanism;

[0041] 6. Diaphragm buffer mechanism;

[0042] 7. Magnetic rod assembly;

[0043] 8. Plasma wind component;

[0044] 9. Correction electric cylinder mechanism. DETAILED DESCRIPTION

[0045] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings and specific embodiments. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present invention.

[0046] It should be noted that when an element is referred to as being “fixed to” another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or there may be an intermediate element.

[0047] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0049] Example 1:

[0050] Please see the attached Figure 1-6 This embodiment provides a diaphragm unwinding and splicing device 100, which has the characteristics of high space utilization, high tape running speed and precise tape running.

[0051] Specifically, the membrane unwinding and splicing device 100 includes a frame 1, on which are arranged, in sequence, an unwinding mechanism 2, a splicing mechanism 3, and a tension control mechanism 4 along the membrane path. A cutter mechanism 5 is also provided on the frame 1 near the splicing mechanism 3 to cut off any remaining membrane 10 after the membrane 10 is spliced.

[0052] The unwinding mechanism 2 comprises two vertically aligned unwinding assemblies 210. These assemblies include an unwinding shaft 211 for placing the membrane roll and an unwinding drive mechanism (not shown). The unwinding drive mechanism rotates the unwinding shaft 211, unwinding the membrane 10 from the membrane roll and delivering it to subsequent mechanisms. During operation, the two unwinding assemblies 210 function as the working unwinding assembly 21 and the backup unwinding assembly 22, respectively, facilitating timely replacement and replenishment of the membrane 10, reducing the time required to renew the membrane roll.

[0053] The splicing mechanism 3 is located on one side of the unwinding mechanism 2 and includes a vertical screw module 310 and a splicing assembly 320 for splicing the new and old membrane rolls. The vertical screw module 310 is parallel to the arrangement of the unwinding assemblies 210. The splicing assembly 320 is connected to the vertical screw module 310 and, under the action of the vertical screw module 310, moves between different unwinding assemblies 210 to facilitate the splicing assembly 320 to splice the new and old membranes 10. This also facilitates adjusting the membrane tape path to accommodate the working unwinding assemblies 21 in different positions.

[0054] The tension control mechanism 4 is located on one side of the splicing mechanism 3. The discharge end of the diaphragm roll on the working unwinding assembly 21 passes through the splicing mechanism 3 and the tension control mechanism 4 in sequence, forming an unwinding belt path for the diaphragm 10. In this embodiment, the tension control mechanism 4 includes a tension swing arm assembly 41 and a tension detection roller assembly 42. The tension detection roller assembly 42 is located above the tension swing arm assembly 41. The diaphragm 10 passing through the splicing mechanism 3 is sequentially wound around the tension detection roller assembly 42 and the tension swing arm assembly 41 to respectively achieve tension measurement and tension control during the unwinding process of the diaphragm 10, so as to ensure that the diaphragm 10 remains flat and wrinkle-free during transportation, thereby improving the performance and quality consistency of the prepared battery.

[0055] The splicing mechanism 3 and the tension control mechanism 4 are both located on one side of the unwinding mechanism 2. In this embodiment, because the unwinding mechanism 2 utilizes a vertically distributed unwinding assembly 210, and the splicing mechanism 3 utilizes a vertically movable splicing assembly 320, and the splicing assembly 320 is movable between different unwinding assemblies 210, the distance between the unwinding mechanism 2 and the splicing mechanism 3 in the diaphragm unwinding and splicing device 100 is reduced. At the same time, the vertically placed unwinding assembly 210 facilitates the horizontal unfolding of the diaphragm 10. At the same time, the horizontally unfolded diaphragm 10 cooperates with the horizontally arranged unwinding mechanism 2, splicing mechanism 3, and tension control mechanism 4 to achieve an overall consistent running direction of the diaphragm 10, reducing the need to change the running direction of the diaphragm 10 and thereby facilitating a reduction in the number of rollers 33. Compared to conventional devices employing horizontally distributed unwinding assemblies 210, the diaphragm unwinding and splicing device 100 of this embodiment further improves space utilization.

[0056] In addition, the vertically distributed unwinding assembly 210 and the overall vertically extending tape splicing mechanism 3 are also beneficial to reducing the impact of the weight of the diaphragm material roll on the unwinding of the diaphragm 10, increasing the tape travel speed of the diaphragm unwinding and tape splicing device 100, while taking into account the unwinding and splicing functions, improving the yield of the diaphragm 10, reducing the possibility of the diaphragm 10 deviating from the point, and improving accuracy.

[0057] It should be noted that the cutter mechanism 5 is provided between different unwinding assemblies 210 and is located on one side of the splicing mechanism 3 , and is used to cut the old diaphragm 10 remaining after the splicing is completed.

[0058] In order to further improve the accuracy of unwinding and splicing, and to improve the automation effect, this embodiment further optimizes the splicing assembly 320. In this embodiment, the splicing assembly 320 includes a DD motor 31 and a diaphragm roller portion 32 connected to the DD motor 31. The diaphragm roller portion 32 includes two parallel rollers 33, and the discharge end of the diaphragm 10 passes through different rollers 33 and then passes through the tension control mechanism 4. The diaphragm roller portion 32 rotates under the drive of the DD motor 31 to adjust the relative positions of the two rollers 33, and further adjusts the belt path of the diaphragm 10 to meet the required belt path when different unwinding assemblies 210 are used as working unwinding assemblies 21. The DD motor 31 has the characteristics of high precision, which makes the adjustment of the belt path more precise.

[0059] The belt splicing mechanism 3 may further include a belt splicing drive motor 311 and a connecting plate 312. The belt splicing assembly 320 is movably connected to the vertical screw module 310 via the connecting plate 312. The belt splicing drive motor 311 drives the connecting plate 312 and the belt splicing assembly 320 to move in the vertical direction via the vertical screw module 310. In this embodiment, the belt splicing mechanism 3 is located on the left side of the unwinding mechanism 2. The connecting plate 312 extends to the right from the vertical screw module 310. The diaphragm roller portion 32 is located at the right end of the connecting plate 312. This positions the diaphragm roller portion 32 between different unwinding assemblies 210, facilitating subsequent belt splicing operations and reducing the length of the diaphragm belt path.

[0060] Figures 3 to 6 Schematic diagrams of the partial membrane belt path structure of the membrane unwinding and splicing device 100 in different states are provided. The following describes the operation of the membrane unwinding and splicing device 100, assuming that the unwinding assembly 210 located at the top is the standby unwinding assembly 22 and the unwinding assembly 210 located at the bottom is the working unwinding assembly 21.

[0061] In the initial unwinding state, the working unwinding assembly 21 below continuously outputs the diaphragm 10, and the diaphragm 10 is moved from the unwinding assembly 210 to the tape splicing mechanism 3. Figure 3 As shown, the rollers 33 extending along the membrane belt path are sequentially a first roller 331 and a second roller 332, with a gap between the first roller 331 and the second roller 332. The discharge end of the membrane 10 then passes sequentially around the side of the first roller 331 facing away from the working unwinding assembly 21, the gap, and the side of the second roller 332 near the working unwinding assembly 21.

[0062] It should be noted that a first position and a second position are provided between the working unwinding assembly 21 and the standby unwinding assembly 22. The first position is located in the middle between the working unwinding assembly 21 and the standby unwinding assembly 22, and the second position is close to the unwinding assembly 210. In the initial unwinding state, the splicing assembly 320 and the connecting plate 312 are located in the first position.

[0063] refer to Figure 4 , when the remaining length of the diaphragm 10 of the working unwinding component 21 reaches the index required for splicing, the diaphragm unwinding splicing device 100 enters the splicing state. At this time, adhesive tape can be pasted on the corresponding positions of the diaphragms of the working unwinding component 21 and the spare unwinding component 22 manually or by machine, and then the connecting plate 312 and the splicing component 320 drive the diaphragm 10 along the vertical screw module 310 toward the spare unwinding component 22 and are located in the second position. At this time, the first roller 331 abuts against the spare unwinding component 22, so that the diaphragm 10 of the working unwinding component 21 is pressed against the diaphragm 10 on the spare unwinding component 22, and the adhesion of different diaphragms 10 is achieved under the action of the adhesive tape. Subsequently, the first roller 331 and the spare unwinding component 22 rotate in the direction of the second roller 332, further bringing out the diaphragm 10, which is conducive to observing whether the splicing is successful.

[0064] refer to Figure 5 After the splicing is completed, the connecting plate 312 and the diaphragm roller portion 32 move downward back to the first position, and the cutter mechanism 5 cuts off the excess diaphragm 10 on the completed spliced ​​diaphragm 10, which is beneficial for the original spare unwinding component 22 to provide the diaphragm unwinding and splicing device 100 with the subsequent required diaphragm 10.

[0065] To prepare for the next tape splice, the DD motor 31 drives the membrane roller unit 32 to rotate. Before rotation, the discharge end of the membrane 10 on the original standby unwinding assembly 22 passes through the roller gap and the side of the second roller 332 close to the working unwinding assembly 21, without being wrapped around the first roller 331. After rotation, the discharge end of the membrane 10 on the original standby unwinding assembly 22 sequentially passes through the side of the original second roller 332 facing away from the standby unwinding assembly 22, the roller gap, and the side of the original first roller 331 close to the standby unwinding assembly 22. In this embodiment, the membrane 10 roller 33 module is rotated 180° to the right, thereby exchanging the positions of the original first roller 331 and the second roller 332, which facilitates adjustment of the membrane belt to an appropriate position.

[0066] At this time, the original standby unwinding assembly 22 becomes the working unwinding assembly for the next unwinding cycle, the original first roller 331 becomes the second roller for the next unwinding cycle, and the original second roller 332 becomes the first roller for the next unwinding cycle. The discharge end of the diaphragm 10 of the working unwinding assembly 21 continues to pass through the first roller 331 facing away from the working unwinding assembly 21, the roller gap, and the second roller 332 facing the working unwinding assembly 21. In this way, the relative positions of the diaphragm 10, the working unwinding assembly 21, the first roller 331, and the second roller 332 remain unchanged along the path of the diaphragm 10.

[0067] Repeating the above process and correspondingly changing the movement or rotation direction of the tape splicing mechanism 3 can realize the next automatic tape splicing process.

[0068] Specifically, in this embodiment, the cutter mechanism 5 is positioned on the side of the splicing mechanism 3 that is away from the membrane strip path. Furthermore, the cutter mechanism 5 is positioned on the same horizontal plane as the first position, minimizing excess membrane 10. In some embodiments, the cutter mechanism 5 may further include a cutter and a cutter rotating assembly. The cutter rotating assembly rotates the cutter to adjust its cutting position, ensuring effective cutting and improving the quality of the membrane 10 splicing.

[0069] In summary, this embodiment provides a diaphragm unwinding and splicing device 100 that can automatically splice and rewind the diaphragm 10 without affecting the unwinding process, thereby improving the efficiency of rewinding and unwinding the diaphragm 10. Furthermore, by designing the position and specific structure of the unwinding mechanism 2, splicing mechanism 3, and tension control mechanism 4, the diaphragm unwinding and splicing device 100 ultimately achieves high space utilization and high-speed and precise tape travel.

[0070] It should be noted that Figure 1 The diagram also shows the membrane tape running diagram when different unwinding components 210 are working. Figure 1 This is only an example of the structure of the diaphragm unwinding and splicing device 100. For the specific situation of the diaphragm roller conveying, please refer to the content of the embodiment and the actual method.

[0071] Example 2:

[0072] The difference between this embodiment and embodiment 1 is that this embodiment further supplements the structure of the diaphragm unwinding and splicing device 100.

[0073] Please refer to Figure 7 The diaphragm unwinding and splicing device 100 may further include a diaphragm buffer mechanism 6 , a magnetic rod assembly 7 and a plasma wind assembly 8 .

[0074] The membrane buffer mechanism 6 is positioned after the tension control mechanism 4. In this embodiment, the membrane 10 passes from the unwinding mechanism 2 through the belt splicing mechanism 3, the tension control mechanism 4, and the membrane buffer mechanism 6, forming a membrane belt path. The membrane buffer mechanism 6 ensures that the membrane 10 maintains a stable tension during transport, preventing problems such as wrinkling or breakage of the membrane 10 due to tension fluctuations.

[0075] Furthermore, a magnetic rod assembly 7 may be provided between the tension rocker assembly 41 and the tension detection roller assembly to remove iron impurities and other magnetic substances in the diaphragm 10 .

[0076] Furthermore, a plasma wind assembly 8 may be provided along the membrane path and behind the membrane buffer mechanism 6. The plasma wind assembly 8 is used to remove static electricity from the membrane 10, thereby preventing the membrane 10 from curling or wrinkling due to static electricity generated during the cutting process. The static electricity removal assembly may include a static electricity removal rod and static electricity removal brackets for fixing both ends of the static electricity removal rod.

[0077] It should be noted that Figure 7 The diagram also shows the membrane tape running diagram when different unwinding components 210 are working. Figure 7 This is only an example of the structure of the diaphragm unwinding and splicing device 100. For the specific situation of the diaphragm roller conveying, please refer to the content of the embodiment and the actual method.

[0078] Example 3:

[0079] The difference between this embodiment and embodiment 1 or embodiment 2 is that this embodiment further supplements the structure of the diaphragm unwinding and splicing device 100.

[0080] Combined with reference Figure 8 The membrane unwinding and splicing device 100 also includes a deflection-correcting electric cylinder mechanism 9. In this embodiment, this mechanism is located on the other side of the frame 1, opposite the unwinding mechanism 2, the splicing mechanism 3, and the tension control mechanism 4. This mechanism is used to precisely control the position of the membrane 10.

[0081] The above content is merely an example and illustration of the structure of the present invention. Although the description is relatively specific and detailed, it should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the concept of the present invention, and these obvious alternative forms are all within the scope of protection of the present invention.

Claims

1. A diaphragm unwinding and splicing device, characterized in that: include An unwinding mechanism, used for driving the diaphragm to unwind, comprises two unwinding assemblies arranged in a vertical direction; The belt splicing mechanism is used for splicing and changing belts between different diaphragms, and includes a vertical screw module and a belt splicing assembly. The belt splicing assembly moves between different unwinding assemblies under the action of the vertical screw module; A tension control mechanism, used to control the tension of the diaphragm, including a tension swing rod assembly and a tension detection roller assembly; and A cutter mechanism, used for cutting the spliced ​​diaphragm, is provided on one side of the splicing mechanism; The unwinding mechanism, the belt connecting mechanism and the tension control mechanism are arranged in sequence to form a diaphragm belt path.

2. The diaphragm unwinding and splicing device according to claim 1, characterized in that: The splicing assembly includes a DD motor and a diaphragm roller portion. The diaphragm roller portion includes two parallel rollers. The diaphragm passes around different rollers. The diaphragm roller portion rotates under the drive of the DD motor.

3. The diaphragm unwinding and splicing device according to claim 2, characterized in that: A roller gap is provided between different rollers; In the unwinding state, the unwinding component is divided into a working unwinding component and a standby unwinding component; Assume that the rollers arranged along the extension direction of the diaphragm belt path are the first roller and the second roller in sequence; The diaphragm discharge end of the working unwinding assembly is sequentially passed around the side of the first roller away from the working unwinding assembly, the roller gap and the side of the second roller close to the working unwinding assembly.

4. The diaphragm unwinding and splicing device according to claim 3, characterized in that: In the unwinding state, the belt splicing mechanism is located in the middle between the working unwinding assembly and the standby unwinding assembly; In the splicing state, the splicing mechanism is close to the standby unwinding assembly, and the first roller abuts against the standby unwinding assembly to achieve splicing of the diaphragm between the working unwinding assembly and the standby unwinding assembly.

5. The diaphragm unwinding and splicing device according to claim 1, characterized in that: The cutter mechanism is arranged on a side of the belt connecting mechanism that extends away from the diaphragm belt path.

6. The diaphragm unwinding and splicing device according to claim 2, characterized in that: The belt connecting mechanism also includes a belt connecting drive motor and a connecting plate. The belt connecting assembly is movably connected to the vertical screw module through the connecting plate. The belt connecting drive motor drives the connecting plate and the belt connecting assembly to move in the vertical direction through the vertical screw module.

7. The diaphragm unwinding and splicing device according to any one of claims 1 to 6, characterized in that: It also includes a diaphragm buffer mechanism, which is arranged after the tension control mechanism.

8. The diaphragm unwinding and splicing device according to any one of claims 1 to 6, characterized in that: A magnetic rod assembly is further provided between the tension swing arm assembly and the tension detection roller assembly for removing magnetic substances on the diaphragm.

9. The diaphragm unwinding and splicing device according to claim 7, characterized in that: Along the diaphragm belt path, the diaphragm buffer mechanism is also connected to a plasma wind component for removing static electricity from the diaphragm.

10. The diaphragm unwinding and splicing device according to any one of claims 1 to 6, characterized in that: The belt connecting mechanism is also connected to a deviation-correcting electric cylinder mechanism.

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