Film tearing mechanism and film tearing device

Abstract

The present application relates to a kind of film tearing mechanism and film tearing device.The film tearing mechanism includes: mechanical arm, can be moved to the direction close to or away from curved substrate;Roller, roller is rotatably connected to mechanical arm, the wheel surface of roller is configured to match the surface of curved substrate for attaching film layer, and the wheel surface of roller is provided with adhesive layer;Roller clamp jaw, movably connected to mechanical arm, and can be cooperated with the wheel surface of roller to clamp film layer;Mechanical arm is used to move roller and roller clamp jaw to the direction away from curved substrate when film layer is clamped, to tear off film layer.The film tearing mechanism and film tearing device of the present application can reliably tear film even for curved substrate with curved surface, have wide applicability, and have high reliability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic product production, and in particular to a film tearing mechanism and a film tearing device. BACKGROUND

[0002] In the production and manufacturing process of electronic products, many intermediate products are attached with protective films on the surface, and the protective films need to be removed in subsequent processing. In recent years, people have developed various automatic film tearing devices, for example, a film tearing adhesive roller with adhesion is contacted with the intermediate product and relative movement is generated to tear the protective film on the surface of the intermediate product. However, this type of film tearing mechanism generally has the disadvantage of poor film tearing reliability when used for some intermediate products with curved surfaces. SUMMARY

[0003] Therefore, it is necessary to provide a film tearing mechanism and a film tearing device to solve the problem of poor film tearing reliability for curved substrates in the prior art.

[0004] The first aspect of the embodiment of the present application provides a film tearing mechanism for tearing a film layer attached to a curved substrate, and the film tearing mechanism comprises:

[0005] A mechanical arm capable of moving towards or away from the curved substrate;

[0006] A roller rotatably connected to the mechanical arm, wherein the surface of the roller is configured to match the surface of the curved substrate for attaching the film layer, and the surface of the roller is provided with a glue layer;

[0007] A roller clamp movably connected to the mechanical arm and capable of clamping the film layer in cooperation with the surface of the roller;

[0008] The mechanical arm is used to drive the roller and the roller clamp to move away from the curved substrate when the film layer is clamped, so as to tear the film layer.

[0009] In one of the embodiments, the diameter of the part of the surface of the roller at the axial center position of the roller is greater than the diameter of the part of the surface of the roller at the axial end position of the roller.

[0010] In one of the embodiments, the diameter of the surface of the roller is configured to gradually decrease in the direction from the axial center position of the roller to the axial end position of the roller.

[0011] In one of the embodiments, the included angle between the tangent line at the axial center position of the roller and the tangent line at the end position of the roller is 2.16°.

[0012] In one of the embodiments, the length of the roller along the axial direction is 8mm, and the diameter of the roller is 18mm.

[0013] In one of the embodiments, the mechanical arm comprises a mounting plate, and two support rods arranged on the mounting plate and oppositely and spacedly arranged, and each of the two opposite axial ends of the roller is provided with a support shaft;

[0014] Each of the support shafts is rotatably supported on one of the support rods to rotatably support the roller between the two support rods.

[0015] In one of the embodiments, each of the support rods is provided with a mounting hole, and each of the support shafts is rotatably supported in the mounting hole of the corresponding support rod by a bearing;

[0016] Each of the support rods is provided with an avoiding gap at the end thereof away from the mounting plate, and the avoiding gap is in communication with the mounting hole, and part of the bearing installed in the mounting hole is exposed from the mounting hole through the avoiding gap.

[0017] In one of the embodiments, the mechanical arm further comprises a driving unit arranged on the mounting plate, a driving end of the driving unit is connected with the roller jaw, and the driving unit is used to drive the roller jaw to move towards the wheel surface of the roller to clamp the film layer between the roller jaw and the wheel surface of the roller.

[0018] In one of the embodiments, the surface of the roller jaw facing the roller is configured as a concave surface matched with the wheel surface of the roller.

[0019] In one of the embodiments, the mechanical arm further comprises a detection sensor arranged on the mounting plate, a detection end of the detection sensor faces the wheel surface of the roller, and the detection sensor is used to detect whether the film layer is clamped between the roller jaw and the roller.

[0020] The second aspect of the embodiments of the present application provides a film tearing device comprising the film tearing mechanism.

[0021] In one of the embodiments, the film tearing device further comprises a rack and a waste film recycling mechanism, and the waste film recycling mechanism and the film tearing mechanism are arranged on the rack; the waste film recycling mechanism comprises a waste film jaw capable of conveying the film layer torn off by the film tearing mechanism to a preset position.

[0022] The film tearing mechanism and the film tearing device have the following beneficial effects:

[0023] In the above scheme, since the wheel surface of the roller is provided with a rubber layer, and the wheel surface of the roller is configured to match the surface of the curved substrate for attaching the film layer, when the wheel surface of the roller is in contact with the film layer, a larger contact area can be obtained, and part of the structure of the film layer can be firmly bonded on the wheel surface of the roller. Since the roller clamp jaw can cooperate with the wheel surface of the roller to clamp the film layer, at this time, the mechanical arm can drive the roller and the roller clamp jaw clamping the film layer to move away from the curved substrate, so as to tear off the film layer on the surface of the curved substrate. The film tearing mechanism of the embodiment can reliably tear the film even for the curved substrate with a curved surface, has wide applicability and high reliability. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 A structure schematic view of the film tearing mechanism provided by the embodiment of the application is provided.

[0025] Figure 2 A structure schematic view of the film tearing mechanism provided by the embodiment of the application is provided.

[0026] Figure 3 A structure schematic view of the film tearing mechanism provided by the embodiment of the application is provided.

[0027] Figure 4 A structure schematic view of the film tearing mechanism provided by the embodiment of the application is provided. Figure 3 A partial enlarged view of A of FIG. 1.

[0028] Figure 5 A structure schematic view of the film tearing mechanism provided by the embodiment of the application is provided.

[0029] Figure 6 A partial enlarged view of B of FIG. 1. Figure 5 A partial enlarged view of B of FIG. 1.

[0030] Figure 7 A structure schematic view of the film tearing device provided by the embodiment of the application is provided.

[0031] BRIEF DESCRIPTION OF DRAWINGS

[0032] 100, film tearing mechanism; 10, mechanical arm; 11, mounting plate; 12, support rod; 121, mounting hole; 122, bearing; 123, avoiding notch; 13, driving unit; 131, body; 132, driving end; 14, detection sensor;

[0033] 20, roller; 21, wheel surface; 22, support shaft; 30, roller clamp jaw;

[0034] 40, film layer;

[0035] 200, film tearing device; 210, workbench; 211, vacuum adsorption hole; 220, waste film recycling mechanism; 221, waste film clamp jaw. DETAILED DESCRIPTION

[0036] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced without using some or all of these specific details, and that the present application is not limited to the specific embodiments disclosed below.

[0037] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are used only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0038] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0039] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing", and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature is "over", "above" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is horizontally higher than the second feature. The first feature is "under", "below" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is horizontally lower than the second feature.

[0041] It should be noted that when an element is referred to as being "fixed to" or "set to" another element, it can be directly on the other element or there can be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be an intermediate element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation.

[0042] The film tearing mechanism and the film tearing device of the embodiments of the present application will be described below with reference to the accompanying drawings.

[0043] Figure 1 A structural schematic diagram of the film tearing mechanism provided by the embodiments of the present application is shown in Figure 2 A structural schematic diagram of the separation of the roller clamping jaw and the roller in the film tearing mechanism provided by the embodiments of the present application is shown in Figure 3 A structural schematic diagram of the cooperation of the roller and the film layer in the film tearing mechanism provided by the embodiments of the present application is shown in Figure 4 A structural schematic diagram of the cooperation of the roller and the film layer in the film tearing mechanism provided by the embodiments of the present application is shown in Figure 3 A partial enlarged view of A in FIG. 8.

[0044] Referring to Figure 1 , Figure 2 , the embodiments of the present application provide a film tearing mechanism 100 for tearing off the film layer 40 attached to the surface of a curved substrate. The film tearing mechanism 100 can include a mechanical arm 10, a roller 20 and a roller clamping jaw 30.

[0045] The mechanical arm 10 is capable of moving towards or away from the curved substrate. The roller 20 is rotationally connected to the mechanical arm 10. The wheel surface 21 of the roller 20 is configured to match the surface of the curved substrate for attaching the film layer 40, and the wheel surface 21 of the roller 20 is provided with a glue layer. The roller clamping jaw 30 is movably connected to the mechanical arm 10 and is capable of cooperating with the wheel surface 21 of the roller 20 to clamp the film layer 40. The mechanical arm 10 is used to drive the roller 20 and the roller clamping jaw 30 to move away from the curved substrate when the film layer 40 is clamped, so as to tear off the film layer 40.

[0046] In the above scheme, since the wheel surface 21 of the roller 20 is provided with a rubber layer, and the wheel surface 21 of the roller 20 is configured to match the surface of the curved substrate for attaching the film layer 40, when the wheel surface 21 of the roller 20 contacts the film layer 40, it has a larger contact area, and can firmly bond part of the structure of the film layer 40 on the wheel surface 21 of the roller 20. Since the roller clamp jaw 30 can cooperate with the wheel surface 21 of the roller 20 to clamp the film layer 40, at this time the mechanical arm 10 can drive the roller 20 and the roller clamp jaw 30 to move away from the curved substrate with the film layer 40 clamped, so as to tear off the film layer 40 on the surface of the curved substrate. The film tearing mechanism 100 of the embodiment can perform film tearing operation on the curved substrate with a curved surface, and has wide applicability.

[0047] The curved substrate can be an optical film layer such as a polarizing sheet, for example, an optical film layer applied to the surface of a VR glasses, etc. The surface of the curved substrate is generally attached with a protective film (hereinafter also referred to as film layer 40). The film tearing mechanism 100 of the embodiment is used to tear off the film layer 40.

[0048] In the embodiment, the curved substrate is in a curved shape when placed on the workbench 210. For example, the curved substrate is in a planar shape when not placed on the workbench 210, and is attached with the surface of the workbench 210 configured as a curved surface when placed on the workbench 210 configured as a curved surface, forming a curved shape. Of course, the present application is not limited to this, and the curved substrate can also be in a curved shape in a natural state. The embodiment takes the example of the curved substrate being placed on the workbench 210 to form a curved shape.

[0049] The curved substrate can be adhered to a carrier film (not shown) by a back adhesive or the like. After the carrier film is placed on the workbench 210, it is fixed on the workbench 210 by structures such as vacuum suction holes 211 provided on the workbench 210.

[0050] In the embodiment, the mechanical arm 10 can be arranged on the rack of the film tearing device 200 and can be driven by the driving device arranged on the rack to approach or move away from the surface of the curved substrate.

[0051] The roller clamp jaw 30 can cooperate with the wheel surface 21 of the roller 20 to clamp the film layer 40, which means that the roller clamp jaw 30 can press the film layer 40 against the wheel surface 21 of the roller 20. In this way, the mechanical arm 10 can drive the roller 20 and the roller clamp jaw 30, as well as the film layer 40, to move away from the curved substrate when the film layer 40 is clamped between the roller clamp jaw 30 and the wheel surface 21 of the roller 20, so as to perform film tearing operation.

[0052] The roller surface 21 is configured to match the surface of the curved substrate on which the film layer 40 is attached. Specifically, when the roller surface 21 is pressed onto the curved substrate on which the film layer 40 is attached, regardless of the curvature of the surface of the curved substrate (hereinafter referred to as the surface of the curved substrate), at least a portion of the surface of the curved substrate can completely match the roller surface 21. Furthermore, since the film layer 40 is generally a thin film with a relatively uniform thickness, configuring the roller surface 21 to match the surface of the curved substrate on which the film layer 40 is attached is essentially equivalent to configuring the roller surface 21 to match the surface of the curved substrate on which the film layer 40 is attached. This ensures that when the roller surface 21 is pressed onto the film layer 40, the roller surface 21 can completely adhere to the film layer 40.

[0053] It is understandable that the roller 20 has a rubber layer on its surface 21. This rubber layer is a relatively thin layer of material. In other words, the presence of a rubber layer on the surface 21 of the roller 20 does not affect the surface shape of the surface 21. That is, the surface 21 of the roller 20 with the rubber layer matches the surface of the curved substrate.

[0054] In this embodiment of the application, by providing an adhesive layer on the wheel surface 21 of the roller 20 instead of wrapping tape around the roller, the amount of consumables can be reduced.

[0055] Figure 3 This is a schematic diagram of the structure of the film-tearing mechanism provided in the embodiments of this application, showing the cooperation between the roller and the film layer. Figure 4 for Figure 3 A magnified view of a portion at point A.

[0056] Reference Figure 3 , Figure 4 In this embodiment of the application, the diameter of the portion of the roller 20 at its axial center O is larger than the diameter of the portions at its axial ends. Here, the axial center O of the roller 20 can specifically be a circle. Figure 3 (As shown by the single-dot dashed line), the center of the circle is located on the axis of the roller 20, and the entire circle is located on the surface of the wheel 21 and at the exact center of the axial direction of the roller 20.

[0057] Furthermore, the diameter of the wheel surface 21 of the roller 20 is configured to gradually decrease in the direction from the axial center position O of the roller 20 to the axial ends of the roller 20.

[0058] Combination Figure 2 , Figure 3 , Figure 4 The surface of the curved substrate for attaching the film layer 40 is formed as an axisymmetric shape, with the axis of symmetry perpendicular to the plane. Figure 3The axis P of the curved surface substrate, the surface of the curved surface substrate is configured to gradually increase in thickness from the axis P to the end position of the curved surface substrate, in order to match it, the wheel diameter of the wheel surface 21 of the roller 20 can be configured to gradually decrease in the direction from the axial center position of the roller 20 to the axial end position of the roller 20, so that the wheel surface 21 of the roller 20 can be completely matched with the surface of the curved surface substrate.

[0059] In the embodiment of the present application, the axis P of the curved surface substrate is defined as the Y direction, the thickness direction of the curved surface substrate is defined as the Z direction, and the direction perpendicular to the Y direction and the Z direction is defined as the X direction.

[0060] In the embodiment of the present application, continuing to refer to Figure 4 , the included angle α between the tangent line at the axial center position O of the roller 20 and the tangent line at the end position of the roller 20 is 2.16°. In this way, the roller 20 can better separate the film layer 40 from the curved surface substrate.

[0061] In the embodiment of the present application, the length dimension h1 of the roller 20 in the axial direction can be 8mm, and the diameter of the roller 20 can be 18mm. In this way, the film tearing effect can be optimized.

[0062] Specifically, if the length dimension of the roller 20 in the axial direction is greater than 8mm, the adhesive layer provided on the wheel surface 21 of the roller 20 can be left on the bearing film for temporarily fixing the curved surface substrate; if the length dimension of the roller 20 in the axial direction is less than 8mm, the area of the adhesive layer on the wheel surface 21 of the roller 20 acting on the curved surface substrate is too small, and due to the stress of the film layer 40 itself, film tearing can fail.

[0063] If the diameter of the roller 20 is less than 18mm, the axial two ends of the roller 20 can interfere with the workbench 210, and if the diameter of the roller 20 is greater than 18mm, the wheel surface 21 of the roller 20 can be too large to cause the entire curved surface substrate to be rolled up during the film tearing process, resulting in film tearing failure.

[0064] In the embodiment of the present application, Figure 5 another angle structural schematic view of the film tearing mechanism provided in the embodiment of the present application, Figure 6 is provided. Figure 5 a local enlarged view of B.

[0065] Referring to 5, Figure 6 The mechanical arm 10 can include a mounting plate 11 and two support rods 12 provided on the mounting plate 11, the two support rods 12 are oppositely and spacedly arranged, and the two opposite axial ends of the roller 20 are each provided with a support shaft 22; each support shaft 22 is rotationally supported on one support rod 12 to rotationally support the roller 20 between the two support rods 12.

[0066] In a specific implementation, each support shaft 22 can be rotatably supported on the end of a support rod 12 away from the mounting plate 11, so as to avoid the interference between the two support rods 12 and the workbench 210 when the wheel surface 21 of the roller 20 contacts the curved base material.

[0067] The mounting plate 11 can be connected with the aforementioned driving device to move close to or away from the workbench 210 under the driving of the driving device.

[0068] Continuing to refer to Figure 6 Each support rod 12 is provided with a mounting hole 121, and each support shaft 22 is rotatably supported in the mounting hole 121 of the corresponding support rod 12 through a bearing 122, so that the end of each support shaft 22 can be rotatably supported on the corresponding support rod 12.

[0069] Further, in order to minimize the possibility of interference between the support rod 12 and the workbench 210, the end of each support rod 12 away from the mounting plate 11 is provided with an avoiding gap 123 communicating with the mounting hole 121, and part of the bearing 122 installed in the mounting hole 121 is exposed from the mounting hole 121 through the avoiding gap 123. In other words, there is only the bearing 122 structure between the support shaft 22 and the workbench 210.

[0070] In the embodiment of the present application, continuing to refer to Figure 2 The mechanical arm 10 further comprises a driving unit 13 provided on the mounting plate 11, a driving end 132 of the driving unit 13 is connected with the roller clamp jaw 30, and the driving unit 13 is used to drive the roller clamp jaw 30 to move towards the wheel surface 21 of the roller 20, so as to clamp the film layer 40 between the roller clamp jaw 30 and the wheel surface 21 of the roller 20.

[0071] In a specific implementation, the driving unit 13 can be a linear driving mechanism, such as a pneumatic cylinder, etc. The driving unit 13 can further comprise a body 131, and the driving end 132 can move linearly along the Y direction relative to the body 131. Specifically, the roller clamp jaw 30 can be connected to the driving end 132, and when the driving end 132 moves along the Y direction relative to the body 131, the roller clamp jaw 30 is driven to move along the Y direction towards or away from the workbench 210.

[0072] Illustratively, the surface of the roller clamp jaw 30 facing the roller 20 is configured as a concave surface matching the wheel surface 21 of the roller 20. This facilitates better cooperation between the roller clamp jaw 30 and the wheel surface 21 of the roller 20.

[0073] In the embodiment of the present application, the mechanical arm 10 further comprises a detection sensor 14 provided on the mounting plate 11, a detection end of the detection sensor 14 faces the wheel surface 21 of the roller 20, and the detection sensor 14 is used to detect whether the film layer 40 is clamped between the roller clamp jaw 30 and the roller 20. The detection sensor 14 can be a proximity sensor, etc.

[0074] Figure 7 This is a schematic diagram of the structure of the film-tearing device provided in the embodiments of this application.

[0075] Reference Figure 7 In a second aspect, this application also provides a film-tearing device 200, including the film-tearing mechanism 100 of the aforementioned embodiments. Furthermore, the structure, function, and working principle of the film-tearing mechanism 100 have been described in detail and will not be repeated here.

[0076] In this embodiment of the application, the film tearing device 200 further includes a frame (not shown) and a waste film recycling mechanism 220. Both the waste film recycling mechanism 220 and the film tearing mechanism 100 are mounted on the frame. The waste film recycling mechanism 220 includes a waste film gripper 221 that can transport the film layer torn off by the film tearing mechanism 100 to a preset position.

[0077] In practice, there are two waste membrane grippers 221, which can be opened or closed relative to each other. When the two waste membrane grippers 221 are closed relative to each other, they can hold the torn membrane layer 40. Figure 7 The state shown corresponds to the state where the waste membrane gripper 221 is open.

[0078] The following is combined Figure 7 Explain the working process of the film-tearing device 200.

[0079] The robotic arm 10 moves the roller 20 to the edge of the film layer 40, so that the wheel surface 21 of the roller 20 contacts the film layer 40, and the edge of the film layer 40 adheres to the wheel surface 21 of the roller 20. The robotic arm 10 moves the edge of the film layer 40 along... Figure 7 As shown, the movement in the Y direction, i.e., towards the waste film recycling mechanism 220, is accompanied by the rotation of the roller 20, which lifts the edge of the film layer 40, completing the film removal operation. At this time, the drive unit 13 drives the roller gripper 30 to press against the roller surface 21 of the roller 20 with the film layer 40 adhered to it. When the robotic arm 10 moves further towards the waste film recycling mechanism 220, it causes the film layer 40 to separate from the curved substrate, completing the film tearing process.

[0080] The detection sensor 14 is used to detect whether the film layer 40 is held between the roller 20 and the roller gripper 30, that is, to detect whether the current film tearing operation is successfully completed.

[0081] After the film-tearing process is completed, the robotic arm 10 moves the torn film layer 40 to the vicinity of the waste film gripper 221. The waste film gripper 221 closes and clamps the torn film layer 40, while the roller gripper 30 moves away from the roller 20. The waste film gripper 221 holds the waste film and stores it in the preset storage location.

[0082] Any combination of the technical features in the above-described embodiments can be made, and for the sake of brevity, not all possible combinations are described, however, as long as the combination of the technical features does not exist in contradiction, it shall be considered within the scope of the present disclosure.

[0083] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it shall not be understood as a limitation on the patent scope of the present application. It shall be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these shall be within the protection scope of the present application. Therefore, the protection scope of the present application patent shall be subject to the appended claims.

Claims

1. A film-removing mechanism for removing a film layer attached to the surface of a curved substrate, characterized in that, The film tearing mechanism comprises: a mechanical arm capable of moving towards or away from the curved substrate; a roller rotatably connected to the mechanical arm, wherein the roller diameter of the part at the axial center of the roller is greater than the roller diameter of the part at the axial ends of the roller, so that the roller surface matches the surface of the curved substrate for attaching the film layer, and the roller surface is provided with a rubber layer; a roller clamp jaw movably connected to the mechanical arm and capable of clamping the film layer with the roller surface; the mechanical arm is used to drive the roller and the roller clamp jaw to move away from the curved substrate when the film layer is clamped, so as to tear off the film layer.

2. The film tearing mechanism of claim 1, wherein, The roller diameter of the roller surface is configured to gradually decrease from the axial center of the roller to the axial ends of the roller.

3. The film tearing mechanism of claim 1, wherein, The included angle between the tangent at the axial center of the roller and the tangent at the end of the roller is 2.16°.

4. The film tearing mechanism of claim 1, wherein, The length of the roller in the axial direction is 8 mm, and the diameter of the roller is 18 mm.

5. The film tearing mechanism according to any one of claims 1 to 4, characterized in that The mechanical arm comprises a mounting plate and two support rods provided on the mounting plate, the two support rods are oppositely and spacedly arranged, and the two opposite axial ends of the roller are provided with support shafts; Each support shaft is rotatably supported on one support rod, so as to rotatably support the roller between the two support rods.

6. The film tearing mechanism of claim 5, wherein, Each support shaft is rotatably supported in the mounting hole of the corresponding support rod through a bearing; The end of each support rod away from the mounting plate is provided with an avoidance notch in communication with the mounting hole, and part of the bearing installed in the mounting hole is exposed from the mounting hole through the avoidance notch.

7. The film tearing mechanism of claim 5, wherein, The mechanical arm further comprises a driving unit provided on the mounting plate, a driving end of the driving unit is connected with the roller clamp jaw, and the driving unit is used to drive the roller clamp jaw to move towards the roller surface, so as to clamp the film layer between the roller clamp jaw and the roller surface.

8. The film tearing mechanism of claim 7, wherein, The surface of the roller clamp jaw facing the roller is configured as a concave surface matching the roller surface.

9. The film tearing mechanism of claim 5, wherein, The mechanical arm further comprises a detection sensor provided on the mounting plate, a detection end of the detection sensor faces the roller surface, and the detection sensor is used to detect whether the film layer is clamped between the roller clamp jaw and the roller.

10. A film tearing device characterized by, The film tearing mechanism comprises:

11. The film tearing device of claim 10, wherein, The film tearing device further comprises a rack and a waste film recycling mechanism, the waste film recycling mechanism and the film tearing mechanism are provided on the rack; The waste film recycling mechanism comprises a waste film clamp jaw capable of conveying the film layer torn off by the film tearing mechanism to a preset position.

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