CN111252320A

CN111252320A - Film tearing structure

Info

Publication number: CN111252320A
Application number: CN202010249219.0A
Authority: CN
Inventors: 邓春华; 邓发友; 李小会; 周海涛; 高罡星
Original assignee: World Precision Manufacturing Dongguan Co Ltd
Current assignee: World Precision Manufacturing Dongguan Co Ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-06-09

Abstract

The invention discloses a film tearing structure, which comprises a positioning device and a film tearing device, wherein the positioning device and the film tearing device are arranged on a rack; the film tearing device comprises a clamping mechanism for clamping a workpiece protective film, a rotating mechanism for driving the clamping mechanism to rotate to tear the film and a moving mechanism for driving the clamping mechanism to move, the clamping mechanism is connected to the rotating mechanism, and the clamping mechanism and the rotating mechanism are both arranged on the moving mechanism. The film tearing device is simple in structure, the protective film can be quickly clamped through the clamping mechanism, the film tearing is realized through the rotation of the rotating mechanism, the structure is simple, and the production efficiency is greatly improved.

Description

Film tearing structure

Technical Field

The invention relates to the technical field of automation equipment, in particular to a film tearing structure.

Background

The FPC has the characteristics of high wiring density, light weight, thin thickness and the like, and is suitable for various electronic equipment such as mobile phones, notebook computers and the like. The manufacturing process of the FPC is various, the FPC workpiece is generally connected with other parts through the back adhesive, before mounting, in order to avoid the influence of the back adhesive on other processes, the protective film can be pasted on the back adhesive, and the protective film is torn off before the pasting is needed. In the prior art, the protective film is generally torn manually, so that the efficiency is low, secondary defects are easily caused to the FPC, and the yield is influenced.

Therefore, a film tearing structure capable of realizing automatic film tearing of the FPC is needed.

Disclosure of Invention

The invention aims to provide a film tearing structure capable of realizing automatic film tearing of an FPC workpiece.

In order to achieve the purpose, the invention provides a film tearing structure, which comprises a positioning device and a film tearing device, wherein the positioning device and the film tearing device are arranged on a rack; the film tearing device comprises a clamping mechanism for clamping a workpiece protective film, a rotating mechanism for driving the clamping mechanism to rotate to tear the film and a moving mechanism for driving the clamping mechanism to move, the clamping mechanism is connected to the rotating mechanism, and the clamping mechanism and the rotating mechanism are both arranged on the moving mechanism.

Compared with the prior art, the film tearing structure comprises a positioning device and a film tearing device, wherein the film tearing device comprises a clamping mechanism, a rotating mechanism and a moving mechanism, the clamping mechanism is connected with the rotating mechanism, and the clamping mechanism and the moving mechanism are both arranged on the moving mechanism. Through the action of the moving mechanism, the clamping mechanism can clamp the protective film on the workpiece at a proper position, and the clamping mechanism is driven by the rotating mechanism to rotate after clamping the protective film, so that the protective film is torn off from the workpiece. The film tearing device is simple in structure, the protective film can be quickly clamped through the clamping mechanism, the film tearing is realized through the rotation of the rotating mechanism, the structure is simple, and the production efficiency is greatly improved.

Preferably, the clamping mechanism comprises a clamping assembly for clamping the protective film and a clamping cylinder for controlling the clamping assembly to open and close, and the clamping cylinder is connected to the clamping assembly. The opening and closing of the clamping assembly is controlled through the cylinder, so that the clamping assembly clamps the protective film on the workpiece.

Preferably, the clamping assembly comprises a first clamping part and a second clamping part which are arranged oppositely, the first clamping part and the second clamping part are both provided with clamping surfaces with grains, and the clamping cylinder acts to enable the first clamping part and the second clamping part to approach each other and clamp the protective film. The clamping surfaces of the first clamping piece and the second clamping piece which are oppositely arranged are provided with grains so as to clamp the protective film more stably.

Preferably, the rotating mechanism includes a rotating motor connected to the clamping mechanism, and the rotating motor acts to drive the clamping mechanism to rotate according to a predetermined angle. The clamping mechanism is connected to the output end of the rotating motor, and the rotating motor acts to drive the clamping mechanism to rotate according to a certain angle so as to rotatably tear off the protective film on the workpiece.

Preferably, the positioning device comprises a jig positioning mechanism for placing the workpiece and a pressing mechanism for pressing the workpiece, the pressing mechanism is telescopically arranged on the rack, and the pressing mechanism acts to position the workpiece on the jig positioning mechanism. The workpiece is placed on a jig positioning mechanism of the positioning device, and is pressed through the pressing mechanism so that the clamping mechanism can clamp the protective film stably.

Preferably, the pressing mechanism is provided with a plurality of pressing components, each pressing component is provided with a detection piece, and whether the film tearing of the workpiece is finished or not is detected by the detection pieces. Whether the film tearing of the workpiece is completed or not is detected by arranging the detection piece so as to avoid influencing the production of the next process, and the film tearing detection device is simple in structure and reasonable in design.

Preferably, the jig positioning mechanism is provided with a concave portion for the clamping assembly to clamp the protective film, the workpiece is placed on the jig positioning mechanism, and the protective film protrudes out of the concave portion. The jig positioning mechanism is provided with a concave part which is a gap for the clamping mechanism to clamp the protective film, and the clamping mechanism can clamp the protective film through the concave part without touching the jig positioning mechanism.

Preferably, the film tearing structure further comprises a vacuum device, a material sucking part for sucking the protective film is arranged on the vacuum device, the vacuum device is connected to the material sucking part, and the vacuum device is started to enable the material sucking part to suck the protective film on the clamping assembly. Set up vacuum apparatus to collect the protection film, because the protection film is pasted before the dyestripping on the gum of work piece, have certain viscidity, set up the better collection protection film of vacuum apparatus ability, in order to avoid the protection film to paste and press from both sides and get the subassembly on and influence the dyestripping next time.

Preferably, the moving mechanism includes a first moving assembly and a second moving assembly, the first moving assembly is used for driving the clamping mechanism to move in the first direction, the second moving assembly is used for driving the clamping mechanism to move in the second direction, the first moving assembly is mounted on the frame, the second moving assembly is disposed on the first moving assembly, and the clamping mechanism and the rotating mechanism are disposed on the second moving assembly. The moving mechanism comprises a first moving assembly moving in a first direction and a second moving assembly moving in a second direction, and the first moving assembly and the second moving assembly are arranged so that the clamping mechanism can be close to each workpiece on the positioning device to prepare for film tearing.

Preferably, the moving mechanism further comprises a first limiting component and a second limiting component, the first limiting component is used for limiting the movement of the first moving component in the first direction, and the second limiting component is used for limiting the movement of the second moving component in the second direction. The arrangement of the first limiting assembly and the second limiting assembly can play a role in protecting and limiting so as to prevent the first moving assembly or the second moving assembly from colliding to damage parts.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a tear-off structure according to an embodiment of the present invention.

Fig. 2 is a schematic view of another state of the tear-off structure of fig. 1.

Figure 3 is a schematic view of another angle of the tear-off structure of figure 1.

Fig. 4 is an enlarged view of the structure of fig. 3A.

Fig. 5 is a partial structural schematic view of the moving mechanism in fig. 1.

Fig. 6 is a schematic structural view of the gripping mechanism and the rotating mechanism in fig. 1.

Fig. 7 is a schematic view of a further angle of the tear-off structure of fig. 1.

Fig. 8 is a schematic structural diagram of the jig positioning mechanism in fig. 1.

Fig. 9 is a schematic structural view of a bending member in the jig positioning mechanism in fig. 1.

Fig. 10 is a schematic structural view of the press assembly of fig. 1.

Description of reference numerals:

100. a tear film structure; 101. a frame;

10. a positioning device; 11. a material pressing cylinder; 12. a material pressing component; 121. pressing blocks; 122. a detection member; 123. a fixing member; 124. an elastic member; 13. a jig positioning mechanism; 131. mounting a plate; 132. a jig; 133. a first positioning assembly; 134. a second positioning assembly; 135. a recess; 14. bending a piece; 141. bending the body; 142. a cam portion; 143. an avoidance part; 144. bending the block; 145. an installation part;

20. a film tearing device; 21. a gripping mechanism; 211. a first clamping member; 212. a second clamping member; 213. a clamping cylinder; 22. a rotation mechanism; 221. a rotating electric machine; 23. a moving mechanism; 231. a first moving assembly; 2311. a first slider; 2312. a first cylinder; 232. a second moving assembly; 2321. a second slider; 2322. a second cylinder; 233. a first limit component; 234. a second limiting component;

30. a vacuum device; 31. a vacuum pump; 32. and a material sucking part.

Detailed Description

In order to explain technical contents and structural features of the present invention in detail, the following description is made with reference to the embodiments and the accompanying drawings.

Referring to fig. 1 to fig. 3, the present invention provides a film tearing structure 100, which includes a positioning device 10 and a film tearing device 20 disposed on a frame 101. The positioning device 10 is used for placing and positioning a workpiece, and the film tearing device 20 is slidably arranged on the rack 101 and used for tearing a protective film on the workpiece so as to be bent and mounted in the next process. Specifically, the film tearing device 20 comprises a clamping mechanism 21 for clamping the workpiece protective film, a rotating mechanism 22 for driving the clamping mechanism 21 to rotate to tear the film, and a moving mechanism 23 for driving the clamping mechanism 21 to move; the gripping mechanism 21 is connected to the rotating mechanism 22, and both the gripping mechanism 21 and the rotating mechanism 22 are provided on the moving mechanism 23.

After the technical scheme is adopted, the film tearing structure 100 of the present invention includes the positioning device 10 and the film tearing device 20, and the film tearing device 20 includes the clamping mechanism 21, the rotating mechanism 22 and the moving mechanism 23, the clamping mechanism 21 is connected to the rotating mechanism 22, and both the clamping mechanism 21 and the moving mechanism 23 are disposed on the moving mechanism 23. By the action of the moving mechanism 23, the gripping mechanism 21 and the rotating mechanism 22 are moved together, and the workpiece is positioned by the positioning device 10, close to the positioning device 10 where the workpiece is placed, and the gripping mechanism 21 grips the protective film on the workpiece at a suitable position. After the protective film is gripped by the gripping mechanism 21, the gripping mechanism 21 is driven to rotate by the rotating mechanism 22, so that the protective film is torn off from the workpiece. The film tearing device is simple in structure, the protective film can be quickly clamped through the clamping mechanism 21, the film tearing is realized through the rotation of the rotating mechanism 22, the structure is simple, and the production efficiency is greatly improved.

Referring to fig. 4 to 6, in some alternative embodiments, the clamping mechanism 21 includes a clamping assembly for clamping the protective film and a clamping cylinder 213 for controlling the opening and closing of the clamping assembly, and the clamping cylinder 213 is connected to the clamping assembly. Specifically, the opening and closing of the gripping assembly is controlled by the gripping cylinder 213, so that the gripping assembly grips the protective film on the workpiece. The clamping assembly comprises a first clamping part 211 and a second clamping part 212 which are arranged oppositely, the first clamping part 211 and the second clamping part 212 are both provided with clamping surfaces with grains, and the first clamping part 211 and the second clamping part 212 are close to each other and clamp the protective film by the action of a clamping cylinder 213. The clamping surfaces of the first clamping piece 211 and the second clamping piece 212 which are arranged oppositely are provided with grains so as to clamp the protective film more stably.

Referring to fig. 5 and 6, in some alternative embodiments, the rotating mechanism 22 includes a rotating motor 221 connected to the clamping mechanism 21, and the rotating motor 221 is operated to rotate the clamping mechanism 21 by a predetermined angle, so as to tear the clamped protective film from the workpiece. It can be understood that the clamping mechanism 21 is connected to the output end of the rotating motor 221, and the rotating motor 221 acts to drive the clamping mechanism 21 to rotate at a certain angle to rotate and tear off the protective film on the workpiece. In the present embodiment, the predetermined angle is a rotation angle of the rotating motor 221 driving the clamping mechanism 21 to rotate to tear off the protective film on the workpiece. For example, the preset angle may be 90 °, 85 °, 105 °, etc., as long as the rotation angle can drive the clamping mechanism 21 to rotate to tear off the protective film on the workpiece, which is not limited in the present invention.

Referring to fig. 1 to 3 and 8 to 10, in some alternative embodiments, the positioning device 10 includes a jig positioning mechanism 13 for placing a workpiece and a pressing mechanism for pressing. The pressing mechanism is telescopically arranged on the frame 101, a pressing cylinder 11 and a plurality of pressing assemblies 12 are arranged on the pressing mechanism, and the pressing cylinder 11 acts to enable the plurality of pressing assemblies 12 to position the workpiece on the jig positioning mechanism 13. The workpiece is placed on the jig positioning mechanism 13 of the positioning device 10, and is pressed by the pressing mechanism, so that the clamping mechanism 21 can clamp the protective film stably.

Referring to fig. 8 to 10, in some alternative embodiments, the pressing assembly 12 includes a pressing block 121, a detecting member 122, a fixing member 123 and an elastic member 124. The pressing block 121 and the detecting member 122 are both disposed on the fixing member 123, and are connected to the pressing cylinder 11 through the fixing member 123, and the fixing member 123 is mounted on a set of guide rail sliders, so that the pressing assembly 12 is slidably disposed on the rack 101 and connected to the pressing cylinder 11. Specifically, an elastic member 124 is further disposed at an end of the fixing member 123 away from the material pressing block 121, and the material pressing block 121 can play a role in buffering when pressing the workpiece through the elastic member 124 so as to prevent the workpiece from being damaged by pressing. The detection piece 122 is arranged on each group of pressing assemblies 12, the detection piece 122 is located above the film tearing position, whether film tearing of the workpiece is completed or not is detected through the detection piece 122, if the film tearing is completed, the workpiece enters the next procedure along with the jig positioning mechanism 13 to be bent and mounted, and if the film tearing is not completed, the film is torn again or an alarm is given to wait for processing. Whether the film tearing of the workpiece is completed or not is detected by arranging the detection piece 122 so as to avoid influencing the next process production, and the film tearing detection device is simple in structure and reasonable in design. In the present embodiment, the pressing portion of the pressing block 121 has a flexible structure, so as to prevent the pressing block 121 from damaging the workpiece when contacting the workpiece. In addition, the pressing block 121 is provided with a groove for avoiding digging on the surface close to the clamping component, so that the pressing block 121 for positioning is prevented from interfering with the clamping component to take the material, and the structure is simple and the design is reasonable.

Referring to fig. 8 to 10, in some alternative embodiments, the jig positioning mechanism 13 includes a mounting plate 131, a jig 132 located on the mounting plate 131, a first positioning assembly 133 located on one side of the jig 132 and a second positioning assembly 134 located on the other side of the jig 132, where the first positioning assembly 133 and the second positioning assembly 134 are both movably and telescopically disposed on the mounting plate 131 to position a workpiece on the jig 132, so that the workpiece can be torn at an accurate position. Specifically, springs for buffering are arranged on the first positioning component 133 and the second positioning component 134, so that the workpieces are prevented from being damaged by the impact during positioning.

Referring to fig. 8 and 9, in some alternative embodiments, the jig positioning mechanism 13 is further provided with a bending member 14, and the bending member 14 includes a bending body 141, a cam portion 142 located at one end of the bending body 141, a bending block 144 located at the other end of the bending body 141, an avoiding portion 143 provided on the bending body 141, and an installation portion 145 located at one side of the cam portion 142. The cam portion 142 is rotatably mounted on the positioning device 10, the bending body 141 is further provided with a mounting portion 145 at one end of the cam portion 142, the bending body 141 is rotatably mounted on the mounting plate 131 through the mounting portion 145, and a reset piece for enabling the bending piece 14 to always have a reset tendency is further provided in the mounting portion 145. The return member is a torsion spring around which the bending member 14 rotates, and when the force of the drive assembly is removed, the torsion spring pulls the member back to the initial position. Specifically, the bending piece 14 is used for bending and mounting a workpiece after the film of the workpiece is torn, the cam portion 142 is pressed by arranging an arc surface matched with the cam portion 142, so that the cam portion 142 rotates around the mounting portion 145, a limiting block is arranged below the bending block 144 to limit the movement of the bending block 144 in the vertical direction, the edge of the bending block 144, which is in contact with the workpiece, is not in contact with the gum on the workpiece, the workpiece is bent, the cam portion 142 is continuously pressed after the bending, and the bending block 144 continuously moves in the horizontal direction, so that the workpiece is mounted on a part to be mounted.

In this embodiment, an avoiding portion 143 is provided on the bending body 141, the bending member 14 is located below the fixture 132 for placing the workpiece, when the clamping member moves to be close to the workpiece, the fixture 132 is provided with a concave portion 135 for the clamping member to clamp the protective film, so as to avoid the bending member 14 from hindering the work of clamping the clamping member when clamping the protective film, the avoiding portion 143 is provided on the bending body 141, and the avoiding portion 143 can make the clamping more smooth, the structure is simple, and the design is reasonable.

Referring to fig. 4, in some alternative embodiments, the jig positioning mechanism 13 is provided with a recess 135 for the clamping assembly to clamp the protective film, the workpiece is placed on the jig positioning mechanism 13, and the protective film protrudes out of the recess 135. The jig positioning mechanism 13 is provided with a concave part 135 which is a gap for the clamping mechanism 21 to clamp the protective film, and the clamping mechanism 21 can clamp the protective film through the concave part 135 without touching the jig positioning mechanism 13 or other parts, so that the structure is simple and the design is reasonable.

Referring to fig. 7, in some alternative embodiments, the film tearing structure 100 further includes a vacuum device 30, the vacuum device 30 includes a vacuum pump 31 for sucking vacuum and a material sucking member 32 for sucking the protective film, the vacuum pump 31 is connected to the material sucking member 32, and the vacuum pump 31 is activated to make the material sucking member 32 suck the protective film on the clamping assembly. Specifically, inhale material piece 32 and be the gradual change structure of outer wide interior narrow for the oral area broad of absorbing the protection film, with more convenient absorption protection film, make the protection film fall into more easily and inhale material piece 32 in. Set up vacuum apparatus 30, can be more convenient collect the protection film, because the protection film is pasted before tearing the membrane on the gum of work piece, has certain viscidity, generally needs the manual work to get the protection film from pressing from both sides the subassembly and take off and collect, so not only inefficiency, have certain potential safety hazard moreover. By arranging the vacuum device 30 below the clamping assembly, after the clamping assembly tears the protective film, the clamping cylinder 213 acts to release the first clamping member 211 and the second clamping member 212 which clamp the protective film, and the protective film still stays on the first clamping member 211 or the second clamping member 212 because the protective film has certain viscosity. The vacuum pump 31 is started to suck the protective film stopped on the first clamping piece 211 or the second clamping piece 212 into the vacuum device 30 through the material sucking piece 32, and then the protective film is recycled uniformly. Set up the collection protection film that vacuum apparatus 30 can be better to the protection film is pasted and is got on pressing from both sides the subassembly and influence the dyestripping next time, simple structure, reasonable in design.

Referring to fig. 1 to fig. 3 and fig. 5, in some alternative embodiments, the moving mechanism 23 includes a first moving assembly 231 and a second moving assembly 232, the first moving assembly 231 is configured to drive the gripping mechanism 21 to move in a first direction, the second moving assembly 232 is configured to drive the gripping mechanism 21 to move in a second direction, the first moving assembly 231 is mounted on the frame 101, the second moving assembly 232 is disposed on the first moving assembly 231, and the gripping mechanism 21 and the rotating mechanism 22 are disposed on the second moving assembly 232. The first moving assembly 231 and the second moving assembly 232 are provided so that the gripping mechanism 21 can approach each workpiece on the positioning device 10 in preparation for film tearing. Specifically, the first moving assembly 231 includes a first cylinder 2312 and a first sliding member 2311, the second moving assembly 232 is disposed on the first sliding member 2311, and the first cylinder 2312 operates to drive the second moving assembly 232 and the component disposed on the second moving assembly 232 to be disposed on the first sliding member 2311 in a sliding manner. The second moving assembly 232 includes a second cylinder 2322 and a second sliding member 2321, the rotating mechanism 22 and the gripping mechanism 21 are disposed on the second sliding member 2321, and the second cylinder 2322 acts to slide the rotating mechanism 22 and the gripping mechanism 21 on the second sliding member 2321. The first slider 2311 and the second slider 2321 each include a rail and a slider. It will be appreciated that the first direction is a direction moving left and right on the frame 101 and the second direction is a direction moving back and forth on the frame 101.

Referring to fig. 1 to 3 and 5, in some alternative embodiments, the moving mechanism 23 further includes a first limiting component 233 and a second limiting component 234, the first limiting component 233 is used for limiting the movement of the first moving component 231 in the first direction, and the second limiting component 234 is used for limiting the movement of the second moving component 232 in the second direction. The first limiting component 233 and the second limiting component 234 are arranged to play a role of protecting and limiting so as to prevent the first moving component 231 or the second moving component 232 from colliding and damaging parts. The first limiting component 233 and the second limiting component 234 each include a limiting component mounted on the frame 101 and a limiting component movably disposed on the moving mechanism 23, and the limiting component and/or the limiting component are/is made of a soft material.

Compared with the prior art, the film tearing structure 100 comprises a positioning device 10 and a film tearing device 20, a workpiece is placed on the positioning device 10, the workpiece is positioned through a jig positioning mechanism 13, and then a pressing component 12 on the positioning device 10 presses the workpiece on the jig positioning mechanism 13 for film tearing. The film tearing device 20 comprises a clamping mechanism 21, a rotating mechanism 22 and a moving mechanism 23, wherein the clamping mechanism 21 is connected to the rotating mechanism 22, and both the clamping mechanism 21 and the moving mechanism 23 are arranged on the moving mechanism 23. By the action of the moving mechanism 23, the gripping mechanism 21 and the rotating mechanism 22 are moved together to be close to the positioning device 10 where the workpiece is placed, the workpiece is positioned by the positioning device 10, and the gripping mechanism 21 grips the protective film on the workpiece at an appropriate position. After the protective film is gripped by the gripping mechanism 21, the gripping mechanism 21 is driven to rotate by the rotating mechanism 22, so that the protective film is torn off from the workpiece. After the film is torn, the protective film is collected by a vacuum device 30. The film tearing device is simple in structure, the protective film can be quickly clamped through the clamping mechanism 21, the film tearing is realized through the rotation of the rotating mechanism 22, the structure is simple, and the production efficiency is greatly improved.

The above disclosure is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the invention, so that the appended claims are intended to cover all such modifications and changes as fall within the true spirit of the invention.

Claims

1. A film tearing structure is characterized by comprising a positioning device and a film tearing device, wherein the positioning device and the film tearing device are arranged on a rack; the film tearing device comprises a clamping mechanism for clamping a workpiece protective film, a rotating mechanism for driving the clamping mechanism to rotate to tear the film and a moving mechanism for driving the clamping mechanism to move, the clamping mechanism is connected with the rotating mechanism, and the clamping mechanism and the rotating mechanism are both arranged on the moving mechanism.

2. The film tearing structure according to claim 1, wherein the clamping mechanism comprises a clamping assembly for clamping the protective film and a clamping cylinder for controlling the clamping assembly to open and close, and the clamping cylinder is connected to the clamping assembly.

3. The film tearing structure according to claim 2, wherein the clamping assembly comprises a first clamping member and a second clamping member which are arranged oppositely, the first clamping member and the second clamping member are respectively provided with a clamping surface with grains, and the clamping cylinder acts to enable the first clamping member and the second clamping member to approach each other and clamp the protective film.

4. The film tearing structure of claim 1, wherein the rotating mechanism comprises a rotating motor connected to the gripping mechanism, and the rotating motor acts to rotate the gripping mechanism by a predetermined angle.

5. The film tearing structure according to claim 1, wherein the positioning device comprises a jig positioning mechanism for placing the workpiece and a pressing mechanism for pressing the workpiece, the pressing mechanism is telescopically arranged on the frame, and the pressing mechanism acts to position the workpiece on the jig positioning mechanism.

6. The film tearing structure according to claim 5, wherein the pressing mechanism is provided with a plurality of pressing components, each pressing component is provided with a detection piece, and the detection piece is used for detecting whether the film tearing of the workpiece is finished.

7. The film tearing structure according to claim 5, wherein the fixture positioning mechanism is provided with a concave portion for the clamping assembly to clamp the protective film, the workpiece is placed on the fixture positioning mechanism, and the protective film protrudes out of the concave portion.

8. The film tearing structure according to claim 1, further comprising a vacuum device, wherein a material sucking part for sucking the protective film is arranged on the vacuum device, the vacuum device is connected to the material sucking part, and the vacuum device is started to enable the material sucking part to suck the protective film on the clamping assembly.

9. The film tearing structure according to claim 1, wherein the moving mechanism comprises a first moving assembly and a second moving assembly, the first moving assembly is used for driving the clamping mechanism to move in a first direction, the second moving assembly is used for driving the clamping mechanism to move in a second direction, the first moving assembly is mounted on the frame, the second moving assembly is arranged on the first moving assembly, and the clamping mechanism and the rotating mechanism are arranged on the second moving assembly.

10. The tear film structure of claim 9, wherein the moving mechanism further comprises a first stop assembly for limiting movement of the first moving assembly in a first direction and a second stop assembly for limiting movement of the second moving assembly in a second direction.