Winding device for producing polyphenylene sulfide sulfone film

By designing a multifunctional film winding device, the problem of the film winding device being deflected and unable to continuously wind during the winding process is solved, and efficient and stable film winding is achieved, which improves production efficiency and equipment applicability.

CN223239278UActive Publication Date: 2025-08-19DEYANG KEJI HIGH TECH MATERIALS CO LTD
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Patent Information

Application Number
CN202421839053.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-08-01
Publication Date
2025-08-19
Estimated Expiration
2034-08-01

AI Technical Summary

Technical Problem

The existing film winding device is prone to deflection during the winding process, resulting in indentation on the surface of the film and the continuous winding cannot be achieved, affecting production efficiency and consuming a large amount of power.

Method used

A film winding device including a vertical plate, a motor, a support plate, a reel, a length adjustment mechanism, a stability auxiliary mechanism and an automatic tensioning mechanism are designed. Through the motor control of the reel position switching and the motor drive gear meshing, continuous winding is achieved, and the winding quality and efficiency are improved through the stable auxiliary and tensioning mechanism.

Benefits of technology

The continuous winding of the film is realized, the winding quality and the practicality of the equipment are improved, the frequency of shutdown and replacement of rollers is reduced, and the power consumption is saved.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a winding device for producing polyphenylene sulfide sulfone films, and particularly relates to the field of polyphenylene sulfide sulfone film winding, which comprises a vertical plate, one side of the vertical plate is fixedly connected with a first motor, one end of the first motor penetrates through the top of the vertical plate and is fixedly connected with a support plate, winding shafts are symmetrically inserted into two ends of the support plate, and the winding shafts are fixedly connected with the support plate. A length adjusting mechanism is arranged in the middle of the winding shaft, and one end of the winding shaft is connected with the supporting plate in a rotating and limiting mode. Firstly, the first motor is started to control the supporting plate to drive the positions of the winding shafts at the two ends of the supporting plate to be exchanged, continuous winding operation can be facilitated, the second motor is started to control the driving gear to drive the connecting gear to rotate, and the winding shafts can be controlled to rotate for winding; and through an arranged stabilizing auxiliary mechanism, the first stabilizing plate can be controlled to move to the upper side and the lower side of the supporting plate after the position of the supporting plate is determined, the meshing stability of the connecting gear and the driving gear is improved, and the winding effect is improved.
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Description

Technical Field

[0001] The utility model belongs to the technical field of polyphenylene sulfide sulfone film winding, in particular to a polyphenylene sulfide sulfone film winding device. Background Art

[0002] Film is widely used in various fields due to its good transparency, moisture barrier and heat resistance. It is a relatively common packaging material. After calendering, the film will be rolled up and neatly wound on the reel. When the film is rolled up on the reel layer by layer, the overlap between the layers must be maintained. Polyphenylene sulfide sulfone is an amorphous resin, and a film winding device is required during the production of polyphenylene sulfide sulfone film.

[0003] Existing film winding devices sometimes deflect during the winding process, causing indentations on the film surface due to twisting, which in turn affects the film quality. In addition, when winding the film, the film often fails to maintain appropriate tension or is too loose, which affects the neatness of the winding.

[0004] The utility model of Chinese patent application number CN202321698334.1 discloses a film winding device, including a reel for winding film, the reel being mounted on a driving shaft, bearing seats being rotatably mounted at both ends of the driving shaft, the bearing seats being connected to a fixed base via bearing seat supports, one end of the driving shaft being transmission-connected to a drive motor that provides power for the rotation of the driving shaft, a winding guide assembly being provided on one side of the reel, the winding guide assembly including a guide roller, the guide roller being rotatably mounted on a guide roller shaft, the film being wound onto the reel after passing through the guide roller, limit baffles being provided on both sides of the guide roller, a mounting inner hole being provided on the mounting inner hole, a sliding sleeve for being sleeved on the guide roller being mounted, the sliding sleeve being made of rubber material, and a first fixed sleeve being provided on the outer edge of the limit baffle. The utility model can complete the film winding work and at the same time guide the film during the winding process to prevent the film from deflecting;

[0005] However, in actual use, there is only one winding roller and its position is fixed. After winding is completed, the machine needs to be stopped to cut the film horizontally and then remove the winding roller after winding is completed. Finally, a new winding roller is replaced and the machine is restarted for a new winding operation. The continuous winding operation of the film cannot be achieved, which not only affects production efficiency, but also the repeated start and stop operations consume a lot of electricity. Utility Model Content

[0006] The technical solution of the utility model aims to solve the technical problem that the existing technical solution is too simple and provides a solution that is significantly different from the existing technology. The utility model provides a winding device for producing polyphenylene sulfide sulfone film, which is intended to solve the above-mentioned existing problems.

[0007] The utility model is implemented as follows: the utility model provides the following technical solutions: a winding device for producing polyphenylene sulfide sulfone film, comprising a vertical plate, one side of the vertical plate is fixedly connected to a first motor, one end of the first motor passes through the top of the vertical plate and is fixedly connected to a support plate, two ends of the support plate are symmetrically inserted with a winding shaft, the middle part of the winding shaft is provided with a length adjustment mechanism, and one end of the winding shaft is connected to the support plate for rotation and limiting;

[0008] The first limit plate is fixedly connected to one end of the winding shaft close to the support plate, one end of the winding shaft passes through the support plate and is fixedly connected to a connecting gear, a stabilization auxiliary mechanism is provided in the middle of the vertical plate, a driving gear is provided on one side of the inner cavity of the annular groove, and one side of the driving gear is fixedly connected to the second motor through a fixing rod;

[0009] A second limiting plate is provided at the end of the winding shaft away from the first limiting plate, a connecting screw is inserted in the middle of the second limiting plate, an annular groove is provided on the side of the vertical plate close to the support plate at a position corresponding to the connecting gear, a placement groove is provided on the side of the vertical plate close to the annular groove, and an automatic tightening mechanism is provided in the middle of one side of the vertical plate.

[0010] In a preferred embodiment, the connecting gear is arranged in the middle of the annular groove, the connecting gear is adapted to the driving gear, the driving gear is meshed with one of the connecting gears, and a guide roller is provided on one side of the vertical plate.

[0011] In a preferred embodiment, the automatic tightening mechanism includes a limiting sliding hole opened in the middle of the vertical plate, a second stabilizing rod is fixedly connected to the middle of the limiting sliding hole, a limiting sliding block is sleeved on the middle of the second stabilizing rod, one side of the limiting sliding block is fixedly connected to the second stabilizing plate, one side of the second stabilizing plate is fixedly connected to a tightening roller, and the top end of the second stabilizing rod is sleeved with a spring.

[0012] In a preferred embodiment, the stabilization auxiliary mechanism includes a placement slot opened on one side of the vertical plate, the placement slot is located on the upper and lower sides of the support plate, a first stabilization plate is provided in the middle of the placement slot, and an electric push rod is provided on the rear side of the vertical plate. The output end of the electric push rod is fixedly connected to the wall of the first stabilization plate, and the rear side of the first stabilization plate is fixedly connected to a first stabilization rod, which passes through the vertical plate and is fixedly connected to the limiting plate.

[0013] In a preferred embodiment, the length adjustment mechanism includes an adjusting rod inserted between the two winding shafts, the two ends of the adjusting rod are respectively inserted between the two winding shafts, and limiting slide grooves are symmetrically opened on both sides of the adjusting rod. A rotating rod is inserted at the top of the winding shaft, and a fixed slider is fixedly connected to the bottom of one end of the inner cavity of the winding shaft.

[0014] In a preferred embodiment, the fixed slider is adapted to the limiting slide groove, the fixed slider is arranged inside a limiting slide groove, the cross-sectional shape of the rotating rod is set to a "T"-shaped structure, and the top of the rotating rod is fixedly connected with a screw head.

[0015] In a preferred embodiment, an insertion rod is inserted into the bottom of the rotating rod, the top of the insertion rod extends to the interior of the rotating rod and is fixedly connected to a threaded block, the threaded block is threadedly connected to the inner cavity wall of the rotating rod, and the bottom of the insertion rod is fixedly connected to a limiting block, and the limiting block is arranged inside the limiting slide groove and is adapted to the limiting slide groove.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. The utility model first starts the first motor to control the support plate to drive the reeling shafts at both ends of the support plate to exchange positions, which can facilitate continuous reeling operations, and starts the second motor to control the driving gear to drive the connecting gear to rotate, which can control the reeling shaft to rotate and reel. After the position of the support plate is determined, the stabilizing auxiliary mechanism can be used to control the first stabilizing plate to move to the upper and lower sides of the support plate, thereby improving the meshing stability of the connecting gear and the driving gear and improving the reeling effect.

[0018] 2. The utility model can tighten the wound film through the automatic tightening mechanism, thereby improving the winding quality. The length adjustment mechanism can be used to adjust the distance between the second limit plate and the first limit plate by rotating the rotating rod in combination with the adjustment rod and pulling the winding shaft, thereby facilitating the winding of films of different widths. The wound film is limited by the cooperation of the second limit plate and the first limit plate, thereby improving the winding quality.

[0019] In summary, through the mutual influence of the above-mentioned multiple effects, the reel can be easily replaced, the continuous reeling operation is convenient and the reeling quality is improved, the length of the reel is conveniently adjusted, and the practicality of the equipment is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0021] Figure 2 This is a structural schematic diagram of the utility model from another angle.

[0022] Figure 3 It is a structural schematic diagram of the vertical plate of the utility model.

[0023] Figure 4 This is a schematic diagram of the connection structure between the first motor and the winding shaft of the utility model.

[0024] Figure 5 This is a schematic diagram of the connection structure between the electric push rod and the first stabilizing plate of the utility model.

[0025] Figure 6 This is a schematic diagram of the cross-sectional structure of the reel of the utility model.

[0026] Figure 7 This is a schematic diagram of the connection structure between the second stabilizing plate and the second stabilizing rod of the present invention.

[0027] Figure 8 It is a schematic diagram of the partial cross-sectional structure of the connection between the reel and the adjusting rod of the utility model.

[0028] In the figure: 1. Vertical plate; 2. First limit plate; 3. First motor; 4. Support plate; 5. Reeling shaft; 6. Connecting gear; 7. Annular groove; 8. Driving gear; 9. Second motor; 10. Placement groove; 11. First stabilizing plate; 12. Electric push rod; 13. First stabilizing bar; 14. Connecting screw; 15. Second limit plate; 16. Guide roller; 17. Second stabilizing plate; 18. Take-up roller; 19. Limiting slide hole; 20. Second stabilizing bar; 21. Limiting slider; 22. Spring; 23. Adjusting rod; 24. Limiting slide groove; 25. Fixed slider; 26. Rotating rod; 27. Insert rod; 28. Threaded block; 29. Limiting block. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] In the description of the present invention, it should be understood that the terms "length," "width," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," and the like, indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, in the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

[0031] As attached Figure 1-8The device for producing polyphenylene sulfide sulfone film shown in the figure comprises a vertical plate 1, one side of the vertical plate 1 is fixedly connected to a first motor 3, one end of the first motor 3 passes through the top of the vertical plate 1 and is fixedly connected to a support plate 4, and two ends of the support plate 4 are symmetrically inserted with a winding shaft 5. When the first motor 3 is started to control the support plate 4 to drive the winding shaft 5 to rotate, the position of the winding shaft 5 that has been wound up and the unused winding shaft 5 can be easily replaced, which is convenient for continuous winding. A length adjustment mechanism is provided in the middle of the winding shaft 5, and one end of the winding shaft 5 is rotatably limitedly connected to the support plate 4. The length of the winding shaft 5 can be adjusted by the length adjustment mechanism to adapt to the winding of films of different widths.

[0032] One end of the winding shaft 5 close to the support plate 4 is fixedly connected to the first limiting plate 2, one end of the winding shaft 5 passes through the support plate 4 and is fixedly connected to the connecting gear 6, a stabilizing auxiliary mechanism is provided in the middle of the vertical plate 1, and a driving gear 8 is provided on one side of the inner cavity of the annular groove 7. One side of the driving gear 8 is fixedly connected to the second motor 9 through a fixing rod. When the second motor 9 is started to control the driving gear 8 to rotate, the meshing connecting gear 6 can be controlled to drive the winding shaft 5 to rotate, which is convenient for winding and can be limited by the first limiting plate 2. The stabilizing auxiliary mechanism can improve the stabilizing effect of the support plate 4 position and the stability of the connection between the connecting gear 6 and the driving gear 8.

[0033] A second limiting plate 15 is provided at the end of the winding shaft 5 away from the first limiting plate 2, and a connecting screw 14 is inserted in the middle of the second limiting plate 15. An annular groove 7 is provided on the side of the vertical plate 1 close to the support plate 4 at a position corresponding to the connecting gear 6, and a placement groove 10 is provided on the side of the vertical plate 1 close to the annular groove 7. An automatic tightening mechanism is provided in the middle of one side of the vertical plate 1. The other end of the winding shaft 5 can be limited by the second limiting plate 15 and the connecting screw 14, thereby limiting the wound film, and facilitating the disassembly of the second limiting plate 15 to unload the wound film, and the wound film is tightened by the automatic tightening mechanism to improve the winding quality.

[0034] As attached Figure 1 、 3 As shown in Figure 4, the connecting gear 6 is arranged in the middle of the annular groove 7, the connecting gear 6 is adapted to the driving gear 8, and the driving gear 8 is engaged with one of the connecting gears 6. A guide roller 16 is provided on one side of the vertical plate 1. The annular groove 7 facilitates the rotation of the connecting gear 6 and facilitates the engagement with the driving gear 8, and the guide roller 16 is used for limiting.

[0035] As attached Figure 1 、 2As shown in , 3, and 7, the automatic tensioning mechanism includes a limiting slide hole 19 opened in the middle of the vertical plate 1, a second stabilizing rod 20 is fixedly connected to the middle of the limiting slide hole 19, a limiting slider 21 is sleeved on the middle of the second stabilizing rod 20, a second stabilizing plate 17 is fixedly connected to one side of the limiting slider 21, a tensioning roller 18 is fixedly connected to one side of the second stabilizing plate 17, a spring 22 is sleeved on the top end of the second stabilizing rod 20, and the spring 22 pushes the limiting slider 21, so that the second stabilizing plate 17 can drive the tensioning roller 18 to generate a downward force, so that the tensioning roller 18 pulls the film passing through the bottom of the tensioning roller 18, thereby improving the quality of film winding.

[0036] As attached Figure 1 、 2 As shown in , 3, and 5, the stabilization auxiliary mechanism includes a placement slot 10 opened on one side of the vertical plate 1, and the placement slot 10 is located at the upper and lower sides of the support plate 4. A first stabilizing plate 11 is arranged in the middle of the placement slot 10, and an electric push rod 12 is arranged on the rear side of the vertical plate 1. The output end of the electric push rod 12 is fixedly connected to the wall of the first stabilizing plate 11, and the rear side of the first stabilizing plate 11 is fixedly connected to a first stabilizing bar 13, which passes through the vertical plate 1 and is fixedly connected to the limiting plate. By starting the electric push rod 12 to control the first stabilizing plate 11 to move to the upper and lower sides of the support plate 4, the horizontal position of the support plate 4 can be limited, thereby improving the stability of the support plate 4, and the first stabilizing bar 13 can improve the stability of the movement of the first stabilizing plate 11, and the first stabilizing plate 11 can be limited and placed by the provided placement slot 10, which facilitates the movement of the first stabilizing plate 11 to the inside of the placement slot 10 without affecting the rotation of the support plate 4.

[0037] As attached Figure 1 、 2 As shown in , 4, 6, and 8, the length adjustment mechanism includes an adjusting rod 23 inserted between the two winding shafts 5, and the two ends of the adjusting rod 23 are respectively inserted between the two winding shafts 5. Limiting slots 24 are symmetrically provided on both sides of the adjusting rod 23, and a rotating rod 26 is inserted on the top of the winding shaft 5. A fixed slider 25 is fixedly connected to the bottom of one end of the inner cavity of the winding shaft 5. Through the cooperation of the limiting slot 24 and the rotating rod 26, the winding shaft 5 can drive the adjusting rod 23 to rotate the other winding shaft 5, which is convenient for winding up the film, and the limiting slot 24 and the fixed slider 25 can be used to pull the winding shaft 5 to make the fixed slider 25 slide inside the limiting slot 24 to adjust the length of the winding shaft 5.

[0038] As attached Figure 1 、 2As shown in , 4, 6, and 8, the fixed slider 25 is adapted to the limiting slide 24, the fixed slider 25 is arranged inside a limiting slide 24, the cross-sectional shape of the rotating rod 26 is set to a "T"-shaped structure, and a screw head is fixedly connected to the top of the rotating rod 26. The rotation of the rotating rod 26 is controlled by rotating the screw head to start the rotation, and the cooperation of the fixed slider 25 and the limiting slide 24 facilitates the limiting of the adjusting rod 23.

[0039] As attached Figure 1 、 2 As shown in , 4, 6, and 8, an insertion rod 27 is inserted into the bottom of the rotating rod 26, and the top of the insertion rod 27 extends to the inside of the rotating rod 26 and is fixedly connected with a threaded block 28. The threaded block 28 is threadedly connected to the inner wall of the rotating rod 26, and the bottom of the insertion rod 27 is fixedly connected to a limiting block 29. The limiting block 29 is arranged inside the limiting slide 24 and is adapted to the limiting slide 24. The rotation of the rotating rod 26 can control the threaded block 28 to move up and down inside the rotating rod 26, thereby controlling the limiting block 29 to move up and down through the insertion rod 27. The limiting block 29 squeezes the wall at the bottom of the inner cavity of the limiting slide 24 to fix the protruding length of the adjusting rod 23, thereby adjusting the overall length of the winding shaft 5.

[0040] The working principle of the utility model is as follows: when in use, first disassemble the second limiting plate 15 through the connecting screw 14 and sleeve the winding paper roll on the middle part of the winding shaft 5, and then penetrate the second limiting plate 15 and fix it with one end of the winding shaft 5 through the connecting screw 14;

[0041] The film then passes through the middle of the guide roller 16 and the bottom of the tension roller 18 and is wound around the surface of the winding shaft 5 near the side of the tension roller 18. The second motor 9 is started to control the drive gear 8 to drive the connecting gear 6 to rotate, which can control the winding shaft 5 to wind the film. When the spring 22 pushes the limit slider 21, the tension roller 18 pushes the film, so that the wound film is tightened, thereby improving the winding quality.

[0042] When the winding roller needs to be replaced, the electric push rod 12 is started to control the first stabilizing plate 11 to move to the inside of the placement groove 10, and the first motor 3 is started to control the winding shaft 5 on both sides to change the position, and then the electric push rod 12 is started to control the first stabilizing plate 11 to move to the upper and lower sides of the support plate 4 to stably support the support plate 4, and the replacement is completed;

[0043] When the overall winding length of the winding shaft 5 needs to be adjusted, the rotating rod 26 is rotated to control the limit block 29 to release the squeeze on the adjusting rod 23, and the winding shaft 5 is pulled to move the adjusting rod 23 from the inside of the winding shaft 5 until the distance between the second limit plate 15 and the first limit plate 2 reaches the required length, and the rotating rod 26 is rotated to squeeze and fix the adjusting rod 23 in turn, and the process is completed.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A winding device for producing polyphenylene sulfide sulfone film, comprising a vertical plate (1), characterized in that: A first motor (3) is fixedly connected to one side of the vertical plate (1), one end of the first motor (3) passes through the top of the vertical plate (1) and is fixedly connected to a support plate (4), a reeling shaft (5) is symmetrically inserted at both ends of the support plate (4), a length adjustment mechanism is provided in the middle of the reeling shaft (5), and one end of the reeling shaft (5) is connected to the support plate (4) in a rotationally limited manner; One end of the reeling shaft (5) close to the support plate (4) is fixedly connected to the first limit plate (2), one end of the reeling shaft (5) passes through the support plate (4) and is fixedly connected to the connecting gear (6), a stabilization auxiliary mechanism is provided in the middle of the vertical plate (1), a driving gear (8) is provided on one side of the inner cavity of the annular groove (7), and one side of the driving gear (8) is fixedly connected to the second motor (9) via a fixing rod; A second limiting plate (15) is provided at one end of the winding shaft (5) away from the first limiting plate (2), a connecting screw (14) is inserted in the middle of the second limiting plate (15), an annular groove (7) is provided on the side of the vertical plate (1) close to the support plate (4) at a position corresponding to the connecting gear (6), a placement groove (10) is provided on the side of the vertical plate (1) close to the annular groove (7), and an automatic tightening mechanism is provided in the middle of one side of the vertical plate (1).

2. The polyphenylene sulfide sulfone film winding device according to claim 1, characterized in that: The connecting gear (6) is arranged in the middle of the annular groove (7), the connecting gear (6) is adapted to the driving gear (8), the driving gear (8) is meshed with one of the connecting gears (6), and a guide roller (16) is provided on one side of the vertical plate (1).

3. The polyphenylene sulfide sulfone film winding device according to claim 1, characterized in that: The automatic tightening mechanism comprises a limiting sliding hole (19) provided in the middle of the vertical plate (1), a second stabilizing rod (20) is fixedly connected to the middle of the limiting sliding hole (19), a limiting sliding block (21) is sleeved on the middle of the second stabilizing rod (20), one side of the limiting sliding block (21) is fixedly connected to the second stabilizing plate (17), one side of the second stabilizing plate (17) is fixedly connected to the tightening roller (18), and a spring (22) is sleeved on the top end of the second stabilizing rod (20).

4. The polyphenylene sulfide sulfone film winding device according to claim 1, characterized in that: The stabilization auxiliary mechanism comprises a placement groove (10) provided on one side of the vertical plate (1), the placement groove (10) being located on the upper and lower sides of the support plate (4), a first stabilization plate (11) being provided in the middle of the placement groove (10), an electric push rod (12) being provided on the rear side of the vertical plate (1), an output end of the electric push rod (12) being fixedly connected to the wall of the first stabilization plate (11), a first stabilization rod (13) being fixedly connected to the rear side of the first stabilization plate (11), the first stabilization rod (13) passing through the vertical plate (1) and being fixedly connected to the limiting plate.

5. The polyphenylene sulfide sulfone film winding device according to claim 1, characterized in that: The length adjustment mechanism comprises an adjustment rod (23) inserted between the two winding shafts (5), the two ends of the adjustment rod (23) are respectively inserted between the two winding shafts (5), and limiting sliding grooves (24) are symmetrically provided on both sides of the adjustment rod (23). A rotating rod (26) is inserted at the top of the winding shaft (5), and a fixed slider (25) is fixedly connected to the bottom of one end of the inner cavity of the winding shaft (5).

6. The polyphenylene sulfide sulfone film winding device according to claim 5, characterized in that: The fixed slider (25) is adapted to the limiting slide groove (24), and the fixed slider (25) is arranged inside a limiting slide groove (24). The cross-sectional shape of the rotating rod (26) is set to a "T"-shaped structure, and the top of the rotating rod (26) is fixedly connected with a screw head.

7. The polyphenylene sulfide sulfone film winding device according to claim 5, characterized in that: The bottom of the rotating rod (26) is provided with an insert rod (27), the top of the insert rod (27) extends to the inside of the rotating rod (26) and is fixedly connected with a threaded block (28), the threaded block (28) is threadedly connected to the inner cavity wall of the rotating rod (26), the bottom of the insert rod (27) is fixedly connected with a limiting block (29), and the limiting block (29) is arranged inside the limiting slide groove (24) and is adapted to the limiting slide groove (24).

Citation Information

Patent Citations

  • Film winding device

    CN219949977U