Diaphragm limiting type film pasting device and film pasting suite

Abstract

The utility model provides a film limiting type film pasting device and a film pasting suite, the film limiting type film pasting device comprises a shell, a containing inner cavity is formed in the shell, a supporting limiting part is arranged in the containing inner cavity, a limiting area is defined by the supporting limiting part, the limiting area is used for containing a mobile terminal to be pasted with a film, and a first limiting part and a second limiting part are arranged at the two ends of the shell in the length direction correspondingly; the first limiting part and the second limiting part are respectively used for connecting two ends of a positioning release layer of the protective film, so that the protective film is positioned on the bottom surface of the accommodating inner cavity, and the protective film and the limiting area are arranged at an interval; a pull-out opening is formed in one side of the shell in the length direction and communicates with the containing inner cavity so that the tearing release layer of the protective film can penetrate out. The shell is further provided with a third limiting part which is used for penetrating through the positioning release layer and abutting against the side, facing the pull-out opening, of the film pasting layer of the protective film. The problem that in the film pasting process in the prior art, the film pasting position is not accurate due to the fact that the position of the film pasting layer is prone to deviation in the process of pulling and tearing the release layer is solved.

Description

Technical Field

[0001] This application relates to the field of film application tools, and more specifically, to a film limiting type film applicator and film application kit. Background Technology

[0002] To protect the screens of mobile phones, tablets, and other terminal devices, users typically apply a protective film, such as a tempered glass film or a soft film, to the flat surface of the device to prevent scratches. During the application process, in order to achieve smooth lines and avoid air bubbles, thus maintaining the aesthetic appearance of the terminal device, a screen protector applicator is usually used to assist users in precise positioning and application, thereby improving the application effect.

[0003] Existing screen protector applicators typically only connect the two ends of the positioning release layer of the protective film via a first and second limiting part located at both ends along its length, thus limiting the position of the protective film. However, during use, it is usually necessary to first peel off the release layer of the protective film to expose the film layer before adhering it to the mobile terminal. But during the process of peeling off the release layer, the entire protective film may be pulled, causing the film layer to shift and resulting in inaccurate application.

[0004] Therefore, existing technologies still need to be improved and developed. Utility Model Content

[0005] The purpose of this application is to provide a film-limiting film applicator and film applicator kit, which solves the problem that the position of the film layer is easily shifted during the pulling and tearing of the release layer in the existing film applicator process, resulting in inaccurate film applicator position.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0007] On one hand, this application provides a film-limiting type film applicator, including a housing, an inner cavity provided inside the housing, a supporting and limiting part provided in the inner cavity, the supporting and limiting part forming a limiting area, the limiting area being used to accommodate a mobile terminal to be applied film, a first limiting part and a second limiting part respectively provided at both ends of the length direction of the housing, the first limiting part and the second limiting part being used to connect the two ends of the positioning release layer of the protective film, so that the protective film is located on the bottom surface of the inner cavity and is spaced apart from the limiting area;

[0008] A pull-out opening is provided on one side of the shell along its length. The pull-out opening is connected to the accommodating cavity to allow the protective film's release layer to pass through.

[0009] The housing is also provided with a third limiting part, which is used to penetrate the positioning release layer and abut against the protective film layer on the side facing the pull-out opening.

[0010] Optionally, the third limiting part includes at least two stops, which are spaced apart in the width direction.

[0011] Alternatively, the two stops can be the same size.

[0012] Optionally, the stop is a square stop, and the directional stop has a limiting stop edge on the side opposite to the pull-out opening and a stop side perpendicular to the limiting stop edge, the side length of the stop side being less than the side length of the limiting stop edge.

[0013] Optionally, the height of the stop is less than the height of the first limiting part, and the height of the stop is less than the height of the second limiting part.

[0014] Optionally, the housing includes a base plate and a side edge disposed at the outer edge of the base plate, the side edge forming an accommodating cavity;

[0015] The side has a first opening and a second opening at both ends in the length direction. The first opening and the second opening are respectively connected to the inner cavity. The first opening and the second opening are respectively used to accommodate the two ends of the positioning release layer of the protective film.

[0016] Optionally, upper side panels are formed on both sides of the second opening, and a pull-out opening is formed between the upper side panels and the bottom plate, the width of the pull-out opening being greater than the width of the second opening.

[0017] Optionally, the support limiting part includes: a first support boss, which is disposed on the bottom surface of the accommodating cavity;

[0018] The second support boss is disposed on the first support boss and forms a limiting step between the second support boss and the first support boss.

[0019] Multiple limiting steps form a limiting zone;

[0020] The inner wall of the second support boss has an inlet ramp at the end opposite to the inner cavity.

[0021] Optionally, the bottom of the accommodating cavity is recessed to form a groove, and a marking part is provided in the groove.

[0022] On the other hand, this application also proposes a film application kit, which includes the film limiting type film applicator as described above and a protective film;

[0023] The protective film includes: an adhesive layer, a positioning release layer, and a peel-off release layer. The positioning release layer is connected to the first and second limiting parts of the film limiting adhesive applicator, and the third limiting part penetrates the positioning release layer and abuts against the adhesive layer.

[0024] The beneficial effects of the film-limiting applicator and applicator kit provided in this application are at least as follows: by providing a supporting and limiting part on the housing, the supporting and limiting part surrounds a limiting area, and an applicator placement area is formed below the limiting area. When applying the film, the two ends of the positioning release layer of the protective film are respectively connected to the first limiting part and the second limiting part at both ends of the length direction of the housing, so that the protective film is located in the applicator placement area. The tear-off release layer of the protective film has a pull-out opening on one side of the length direction, which facilitates the separation of the tear-off release layer from the protective film during application. The positioning release layer of the protective film is sleeved on the third limiting part, and the third limiting part abuts against the side of the protective film's applicator layer facing the pull-out opening. During the process of separating the release layer from the protective film, the protective film tends to move towards the pull-out opening due to the applied tension. However, the third limiting part abuts against the film layer of the protective film, thereby blocking the movement of the film layer and keeping it in the predetermined position. This prevents the film layer from shifting during the application process and makes the position of the film layer on the screen of the mobile terminal more accurate. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of a diaphragm limiting type applicator provided in an embodiment of this application;

[0027] Figure 2 An exploded view of a diaphragm-limiting applicator provided in this application embodiment during use;

[0028] Figure 3 This is a schematic diagram of the structure of a diaphragm limiting type applicator in use, provided in an embodiment of this application.

[0029] Figure 4 This is a schematic diagram of the structure of a film application kit provided in an embodiment of this application.

[0030] The following are the labeling elements in the figure:

[0031] 10. Mobile phone; 20. Protective film; 21. Positioning release layer; 22. Pull hole; 23. Limiting hole; 24. Penetrating hole; 25. Film layer; 26. Peelable release layer; 100. Housing; 110. Accommodating cavity; 120. Supporting and limiting part; 121. First supporting boss; 122. Second supporting boss; 123. Limiting step; 124. Guide slope; 130. Pull-out opening; 140 150. Base plate; 151. Side edge; 152. First opening; 153. Second opening; 160. Upper retaining edge; 170. Groove; 171. Marking part; 180. Pressing hole; 200. First limiting part; 210. First hook; 300. Second limiting part; 310. Second hook; 400. Third limiting part; 410. Stand; 411. Limiting retaining edge; 412. Stop side. Detailed Implementation

[0032] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0033] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it may be directly or indirectly located on that other component. When a component is referred to as "connected to" another component, it may be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate orientations or positions based on the accompanying drawings, and are for ease of description only, and should not be construed as limiting the technical solution. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. "A plurality" means two or more, unless otherwise explicitly defined.

[0034] Example 1

[0035] like Figure 1 , Figure 2 As shown, this embodiment proposes a film-limiting screen protector for applying a screen protector to a mobile terminal. The mobile terminal in this embodiment can be a mobile phone 10, or it can be an electronic device such as a tablet computer, e-reader, or smartwatch. For ease of structural description in this embodiment, the long side of the mobile phone 10 is taken as the length direction, the short side as the width direction, and the thickness direction as the vertical direction. Figure 2 , Figure 3As shown, this film-limiting type screen protector applicator is used to adhere a protective film 20 to the screen of a mobile phone 10. The protective film 20 mainly includes: an adhesive layer 25, a positioning release layer 21, and a peel-off release layer 26. The adhesive layer 25 is used to adhere to the surface of the mobile phone 10, thereby protecting the screen of the mobile phone 10. The positioning release layer 21 is detachably disposed on one side of the adhesive layer 25 and is used to connect to this film-limiting type screen protector applicator. The peel-off release layer 26 is disposed on the side of the adhesive layer 25 opposite to the positioning release layer 21 and facing the mobile phone 10. In use, both the positioning release layer 21 and the peel-off release layer 26 are pulled away from the adhesive layer 25, leaving only the adhesive layer 25 adhered to the screen surface of the mobile phone 10.

[0036] like Figure 1 , Figure 2 , Figure 3As shown, this embodiment proposes a film-limiting type screen protector, mainly comprising: a housing 100, with an accommodating cavity 110 inside the housing 100. The housing 100 is a longitudinal structure matching the shape of a mobile phone 10, thus having length, width, and thickness directions. The opening of the accommodating cavity 110 faces upward, and a supporting and limiting part 120 is provided in the accommodating cavity 110. The supporting and limiting part 120 is integrally formed with the housing 100, and the supporting and limiting parts 120 are distributed around the accommodating cavity 110 to form a limiting area. The mobile phone 10 to be covered is placed on the supporting and limiting part 120 with its screen facing downward, thereby limiting the mobile phone 10. The limiting area formed by the supporting and limiting parts 120 can be of different sizes to adapt to different mobile phones 10. A first limiting part 200 and a second limiting part 300 are respectively provided at both ends of the length direction of the housing 100. The first limiting part 200 and the second limiting part 300 are respectively used to connect the two ends of the positioning release layer 21 of the protective film 20 so that the protective film 20 is located on the bottom surface of the accommodating cavity 110 and is spaced apart from the limiting area. Therefore, when the positioning release layer 21 is connected to the housing 100, the entire protective film 20 is located below the screen of the mobile phone 10 to be covered. A pull-out opening 130 is provided on one side of the housing 100 along its length. The pull-out opening 130 communicates with the accommodating cavity 110 to allow the release layer 26 of the protective film 20 to pass through. Thus, the release layer 26 is located on the upper part of the protective film 20. After the protective film 20 and the mobile phone 10 to be covered are placed on the screen protector, the release layer 26 of the protective film 20 is first peeled off, exposing the film layer 25 of the protective film 20 and facing the screen of the mobile phone 10. Then, the film layer 25 is adhered to the mobile terminal. Because there is a gap between the screen of the mobile phone 10 and the protective film 20, the release layer 26 can easily contact the screen of the mobile phone 10 through this gap during the peeling process, achieving the screen dust removal function. The housing 100 is also provided with a third limiting part 400, which is used to penetrate the positioning release layer 21 and abut against the side of the protective film 20's adhesive layer 25 facing the pull-out opening 130. The third limiting part 400 has two functions: First, during the penetration of the positioning release layer 21, the third limiting part 400 can cooperate with the positioning release layer 21 to limit the positioning release layer 21, making the positioning release layer 21 more accurate and thus making the entire protective film 20 more accurately positioned. Second, by abutting against the adhesive layer 25 of the protective film 20, the third limiting part 400 blocks the movement of the adhesive layer 25, thus keeping the adhesive layer 25 in the predetermined position during the pulling and tearing of the release layer 26.

[0037] like Figure 2 , Figure 3 , Figure 4As shown, in this embodiment, a film-limiting type applicator is provided with a support limiting part 120 on the housing 100, so that the support limiting part 120 surrounds a limiting area, and a film placement area is formed below the limiting area. When applying the film, the two ends of the positioning release layer 21 of the protective film 20 are respectively connected to the first limiting part 200 and the second limiting part 300 at both ends of the length direction of the housing 100, so that the protective film 20 is located in the film placement area. The tear-off release layer 26 of the protective film 20 is provided with a pull-out opening 130 from one side of the length direction, so that the tear-off release layer 26 can be separated from the protective film 20 during the application of the film. The positioning release layer 21 of the protective film 20 is sleeved on the third limiting part 400, and the third limiting part 400 abuts against the side of the film layer 25 of the protective film 20 facing the pull-out opening 130. During the process of separating the release layer 26 from the protective film 20, the protective film 20 tends to move toward the pull-out opening 130 due to the tension applied toward the pull-out opening 130. However, the third limiting part 400 abuts against the film layer 25 of the protective film 20, thereby blocking the movement of the film layer 25 and keeping the film layer 25 in the predetermined position. This prevents the film layer 25 from shifting during the application process and makes the position of the film layer 25 adhered to the screen of the mobile phone 10 more accurate.

[0038] like Figure 1 , Figure 2 , Figure 3 As shown, further, the first limiting part 200 of this embodiment specifically includes two first hooks 210 spaced apart along the width direction, which are used to connect one end of the protective film 20 in the length direction. The second limiting part 300 specifically includes two second hooks 310 spaced apart along the width direction, which are used to connect and limit the other end of the protective film 20 in the length direction. In the specific structure, a pull hole 22 is provided on one end of the positioning release layer 21 in the length direction, and a limiting hole 23 is provided on the other end. The first hooks 210 are hooked in the pull hole 22, and the second hooks 310 are hooked in the limiting hole 23. In this way, the stability of the connection of the protective film 20 is ensured by the two first hooks 210 and the two second hooks 310. In this embodiment, the first hook 210 and the second hook 310 can be in the form of hooks or columns, which can connect the two ends of the positioning release layer 21 of the protective film 20 and limit the position of the protective film 20 in the width direction.

[0039] like Figure 1 , Figure 2 , Figure 3As shown, the third limiting part 400 in this embodiment further includes at least two baffles 410, which are spaced apart in the width direction. Specifically, two through holes 24 are also provided at the end of the positioning release layer 21 near the limiting hole 23 in the length direction. The two through holes 24 are spaced apart in the width direction, and their shapes match the outer contour of the third limiting part 400. Therefore, by providing two baffles 410, firstly, the obstruction of the film layer 25 in the width direction is more stable; secondly, as the baffles 410 pass through the two through holes 24, they further limit the film layer 25 in the width direction, making the position of the protective film 20 on the housing 100 more stable and further ensuring the accuracy of the film application.

[0040] like Figure 1 , Figure 2 As shown, in this embodiment, the two baffles 410 are of the same size. When the two baffles 410 of the same size abut against the two ends of the film layer 25 of the protective film 20 in the width direction, the film layer 25 is subjected to more uniform force during the pulling process, and the film layer 25 is prevented from being damaged due to uneven force on one side when the baffles 410 are squeezed.

[0041] like Figure 1 , Figure 2 As shown, in this embodiment, the baffle 410 is a square baffle 410. The baffle 410 has a limiting edge 411 on the side opposite to the pull-out opening 130 and a blocking side 412 perpendicular to the limiting edge 411. The side length of the blocking side 412 is less than the side length of the limiting edge 411. Because the side length of the limiting edge 411 is longer, the contact distance with the edge of the film layer 25 is longer during the process of abutting against the film layer 25. This ensures that the compressive force between the film layer 25 and the limiting edge 411 is relatively stable after being stretched, and the dispersion distance is relatively long, thereby enabling the baffle 410 to more stably abut and limit the film layer 25.

[0042] like Figure 1 , Figure 2 As shown, in this embodiment, the height of the baffle 410 is less than the height of the first limiting part 200, and the height of the baffle 410 is less than the height of the second limiting part 300. The baffle 410 is smaller in height, and it only limits the baffle to the height of the film layer 25, thus preventing the protective film 20 from being pushed up by the release liner 26, which facilitates the tearing and detachment of the release liner 26.

[0043] like Figure 1 , Figure 2As shown, the housing 100 of this embodiment further includes a base plate 140 and a side 150 disposed on the outer edge of the base plate 140, the side 150 forming an accommodating cavity 110. The base plate 140 has a rectangular structure with rounded corners around its perimeter, and the side 150 has a first opening 151 and a second opening 152 respectively at both ends in the length direction. The first opening 151 and the second opening 152 are respectively connected to the accommodating cavity 110. A first limiting part 200 is disposed in the first opening 151 and a second limiting part 300 is disposed in the second opening 152, so that the first opening 151 and the second opening 152 are respectively used to accommodate the two ends of the positioning release layer 21 of the protective film 20.

[0044] like Figure 1 , Figure 2 As shown, further, in this embodiment, upper baffles 160 are formed on both sides of the second opening 152. A pull-out opening 130 is formed between the upper baffles 160 and the base plate 140, and the width of the pull-out opening 130 is greater than the width of the second opening 152. The upper baffles 160 on both sides limit one end of the mobile phone 10 in the length direction, so that the mobile phone 10 can be stably limited in the accommodating cavity 110. In a specific structure, a support protrusion can be provided on the side of the upper baffles 160 facing the accommodating cavity 110. The support protrusion at this position abuts against the side wall of the accommodating cavity 110, thereby limiting the mobile phone 10. The width of the pull-out opening 130 is set to be relatively large, which makes it convenient to pull the release layer 26 out of the pull-out opening 130 and separate it from the protective film 20 when applying the film.

[0045] like Figure 1 , Figure 2 As shown, the support limiting part 120 in this embodiment further includes a first support boss 121 and a second support boss 122. The first support boss 121 is disposed on the bottom surface of the accommodating cavity 110, and the second support boss 122 is disposed on the first support boss 121, forming a limiting step 123 between the second support boss 121 and the first support boss 121. Multiple limiting steps 123 surround a limiting area. The support limiting part 120 is disposed on the two side walls in the width direction of the accommodating cavity 110, and on the inner wall of the accommodating cavity 110 away from the pull-out opening 130. At least two support limiting parts 120 are disposed on each inner wall, thereby achieving a more stable limiting and fixing of the mobile phone 10.

[0046] like Figure 1 , Figure 2 As shown, an inlet ramp 124 is provided on the inner wall of the second support boss 122 at the end away from the accommodating cavity 110. The inlet ramp 124 gradually moves away from the side 150 in the direction from top to bottom, thereby making the opening of the limiting area larger, so that the mobile phone 10 can be placed in the limiting area and limited by the support limiting part 120.

[0047] like Figure 1 , Figure 2 , Figure 4 As shown, further, the bottom of the accommodating cavity 110 in this embodiment is recessed to form a groove 170, and a marking portion 171 is provided in the groove 170. The marking portion 171 can clearly identify the mobile phone model 10 to which this film-limiting film applicator is applicable, and by placing the marking portion 171 in the bottom groove 170 in the accommodating cavity 110, the marking portion 171 does not protrude from the bottom surface of the accommodating cavity 110, thus avoiding contact and wear between the protective film 20 and the marking portion 171 during the film application process.

[0048] Example 2

[0049] like Figure 4 As shown, this embodiment provides a film application kit, which includes the film-limiting film applicator described above and a protective film 20. Figure 2 , Figure 4 As shown, the protective film 20 in this embodiment specifically includes: an adhesive layer 25, a positioning release layer 21, and a peel-off release layer 26. The adhesive layer 25 is used to adhere to the surface of the mobile phone 10, thereby protecting the screen of the mobile phone 10; the positioning release layer 21 is detachably disposed on one side of the adhesive layer 25, and is used to connect to the cover of the film limiting type film applicator. One end of the positioning release layer 21 in the length direction is provided with a pull hole 22, and the other end is provided with a limiting hole 23. A penetrating hole 24 is provided near the limiting hole 23; the pull hole 22 can be sleeved on the first limiting part 200; the limiting hole 23 is used to be sleeved on the second limiting part 300 for limiting; and the penetrating hole 24 is sleeved on the third limiting part 400. The positioning release layer 21 is connected to the first limiting part 200 and the second limiting part 300 of the film limiting type applicator, and the third limiting part 400 penetrates the positioning release layer 21 and abuts against the film layer 25.

[0050] like Figure 1 , Figure 2 , Figure 3 As shown, in use, the protective film 20 is placed at the bottom of the accommodating cavity 110, with one end of the positioning release layer 21 connected to the first limiting part 200 through the pull hole 22 and the other end connected to the second limiting part 300 through the limiting hole 23, and the penetrating hole 24 fitted onto the third limiting part 400 and abutting against the film layer 25; the peel-off release layer 26 is located on the side of the film layer 25 away from the positioning release layer 21 and extends through the pull-out opening 130 at one end of the housing 100. The mobile phone 10 to be coated is then placed in the housing 100 with the screen facing down, and the peel-off release layer 26 is pulled out from the pull-out opening 130, exposing the film layer 25 and making it face upwards; then the positioning release layer 21 of the protective film 20 is pressed through the pressing hole 180 at the bottom of the housing 100, causing the film layer 25 to adhere to the screen. Finally, the mobile phone 10 is removed and the positioning release layer 21 is peeled off.

[0051] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A diaphragm-limiting film applicator, characterized in that, The device includes a housing with an inner cavity. A supporting and limiting part is provided in the inner cavity, and the supporting and limiting part forms a limiting area. The limiting area is used to accommodate a mobile terminal to which the film is to be applied. A first limiting part and a second limiting part are respectively provided at both ends of the length direction of the housing. The first limiting part and the second limiting part are respectively used to connect the two ends of the positioning release layer of the protective film, so that the protective film is located on the bottom surface of the inner cavity and is spaced apart from the limiting area. A pull-out opening is provided on one side of the shell along its length, and the pull-out opening is connected to the accommodating cavity to allow the protective film's release layer to pass through. The housing is also provided with a third limiting part, which is used to penetrate the positioning release layer and abut against the side of the protective film layer facing the pull-out opening.

2. The diaphragm-limiting applicator as described in claim 1, characterized in that, The third limiting part includes at least two stops, and the at least two stops are spaced apart in the width direction.

3. The diaphragm-limiting applicator as described in claim 2, characterized in that, The two barriers are of the same size.

4. The diaphragm limiting applicator as described in claim 3, characterized in that, The baffle is a square baffle, and the baffle has a limiting baffle side facing away from the pull-out opening and a baffle side perpendicular to the limiting baffle side. The side length of the baffle side is less than the side length of the limiting baffle side.

5. The diaphragm-limiting applicator as described in claim 2, characterized in that, The height of the baffle is less than the height of the first limiting part, and the height of the baffle is less than the height of the second limiting part.

6. The diaphragm-limiting applicator as described in claim 1, characterized in that, The housing includes a base plate and a side edge disposed on the outer edge of the base plate, the side edge forming the accommodating cavity; The side has a first opening and a second opening at both ends in the length direction. The first opening and the second opening are respectively connected to the accommodating cavity. The first opening and the second opening are respectively used to accommodate the two ends of the positioning release layer of the protective film.

7. The diaphragm-limiting applicator as described in claim 6, characterized in that, Upper retaining platforms are formed on both sides of the second opening, and the pull-out opening is formed between the upper retaining platforms and the bottom plate at a distance. The width of the pull-out opening is greater than the width of the second opening.

8. The diaphragm-limiting applicator as described in claim 1, characterized in that, The supporting and limiting part includes: a first supporting boss, which is disposed on the bottom surface of the accommodating cavity; The second support boss is disposed on the first support boss and forms a limiting step between the second support boss and the first support boss; The multiple limiting steps enclose the limiting area; The inner wall of the second support boss has an inlet ramp at the end opposite to the accommodating cavity.

9. The diaphragm-limiting applicator as described in claim 1, characterized in that, The bottom of the accommodating cavity is recessed to form a groove, and a marking part is provided in the groove.

10. A screen protector kit, characterized in that, Includes the film-limiting applicator as described in any one of claims 1-9 and the protective film; The protective film includes: an adhesive layer, a positioning release layer, and a peel-off release layer. The positioning release layer is connected to the first and second limiting parts of the film limiting adhesive applicator, and the third limiting part penetrates the positioning release layer and abuts against the adhesive layer.

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