Protective film, protective film components and lamination jigs

Abstract

The present application relates to a protective film, a protective film assembly, and a laminating jig. The protective film includes a central portion and a peripheral portion, wherein the peripheral portion is connected to the central portion and is arranged around the central portion. The peripheral portion is provided with a plurality of slits arranged at intervals along the circumferential direction of the peripheral portion, and the plurality of slits divide the peripheral portion into a plurality of sub-peripheral portions. Two adjacent sub-peripheral portions can be staggered along the circumferential direction of the peripheral portion by means of corresponding slits, so that the two adjacent sub-peripheral portions are at least partially overlapped. This can reduce the probability of wrinkles on the edge of the protective film, and is also beneficial for maintaining the cleanliness of the product to be laminated, thereby improving the protective effect of the protective film.

Description

Technical Field

[0001] The present application relates to the technical field of display panels, and in particular to a protective film, a protective film assembly, and a laminating jig. Background Art

[0002] Display panels include products with curved surfaces, such as curved glass. During the production of display panels, a protective film is usually required to be attached to the curved surface of the product to protect the curved surface of the product so that clean products can be transported from the previous production point to the next production point. However, traditional protective films can easily cause local stains and scratches on the curved surface of the product during use. Summary of the Invention

[0003] Based on this, it is necessary to provide a protective film, a protective film assembly and a bonding jig to address the problem that traditional protective films are prone to staining and scratching the curved surface of the product during use.

[0004] According to a first aspect of the present application, a protective film is provided, comprising:

[0005] central part; and

[0006] a peripheral portion connected to the central portion and arranged around the central portion;

[0007] In which, the peripheral portion is provided with a plurality of slit portions arranged at intervals along the circumferential direction of the peripheral portion, and the plurality of slit portions divide the peripheral portion into a plurality of sub-peripheral portions. Two adjacent sub-peripheral portions can be staggered along the circumferential direction of the peripheral portion with the help of the corresponding slit portions so that the two adjacent sub-peripheral portions are at least partially overlapped.

[0008] In one embodiment, the central portion is a circular structure, and the slit portion is extended radially along the central portion.

[0009] In one embodiment, the plurality of slits include a first slit and a second slit arranged at intervals along a circumferential direction of the peripheral portion;

[0010] The length of the first slit portion is greater than or less than the length of the second slit portion;

[0011] The length of the slit portion is the dimension of the slit portion along the longitudinal extension direction of the slit portion.

[0012] In one embodiment, the central portion has a circular structure;

[0013] The plurality of slits include two third slits, and the two third slits are symmetrically arranged around the central portion.

[0014] Among the plurality of slits, the third slit is the longest;

[0015] The length of the slit portion is the dimension of the slit portion along the longitudinal extension direction of the slit portion.

[0016] In one embodiment, the distance between the ends of the two third slits close to the central portion is less than or equal to a preset value.

[0017] In one embodiment, the preset value is 1mm-2mm.

[0018] In one embodiment, the protective film further includes an operating portion, and the sub-peripheral portion adjacent to the third slit portion is connected to the operating portion.

[0019] In one embodiment, the protective film further includes two operating parts;

[0020] Along the circumferential direction of the peripheral portion, two sub-peripheral portions located on opposite sides of one of the third slit portions are respectively connected to the two operating portions in a one-to-one correspondence.

[0021] According to a second aspect of the present application, a protective film assembly is provided, comprising:

[0022] The protective film according to any of the above embodiments, wherein the protective film has a protective surface for being attached to a curved surface of a product to be attached; and

[0023] A release film is provided on the protective surface of the protective film in a releasable manner.

[0024] According to a third aspect of the present application, a laminating jig is provided, which is applied to the above-mentioned protective film assembly, and includes:

[0025] A support member, for adaptively supporting the product to be bonded; and

[0026] a pressure head, arranged opposite to the support member along a first direction;

[0027] Wherein, the pressure head is further provided with an adsorption hole for adsorbing and fixing the protective film, and the adsorption hole is arranged toward the support member;

[0028] The peeling film is provided with at least three positioning holes on the portion located on the periphery of the protective film;

[0029] The pressure head is provided with at least three alignment holes corresponding to the positioning holes one by one. The peeling film is positioned on the pressure head with the help of the positioning holes and the corresponding alignment holes, and the protective film of the protective film assembly positioned and fixed on the pressure head can be aligned with the product to be bonded on the support member.

[0030] In one embodiment, the release film comprises:

[0031] A first portion is releasably provided on the protective surface of the protective film;

[0032] a second part, arranged around the first part;

[0033] Wherein, the at least three positioning holes are provided on the second part.

[0034] In one embodiment, the at least three positioning holes include a first positioning hole extending longitudinally along the second direction, and a second positioning hole extending longitudinally along the third direction;

[0035] The first direction, the second direction, and the third direction intersect with each other.

[0036] In the technical solution of the present application, when the protective film is attached to the curved surface of the product to be bonded, the two adjacent sub-peripheral portions can be staggered along the circumferential direction of the peripheral portion, so that along the circumferential direction of the peripheral portion, the two adjacent sub-peripheral portions are at least partially overlapped, and then, among the two adjacent sub-peripheral portions, a part of the first sub-peripheral portion and the second sub-peripheral portion respectively cover the two connected parts on the curved surface of the product to be bonded, and the other part of the second sub-peripheral portion covers the first sub-peripheral portion. In this way, the overlapping parts of the two adjacent sub-peripheral portions form double protection for the curved surface of the product to be bonded, which can reduce the probability of wrinkles on the edge of the protective film, and is also beneficial to maintaining the cleanliness of the product to be bonded and improving the protective effect of the protective film. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic structural diagram of a protective film in an embodiment of the present application is shown.

[0038] Figure 2 A schematic diagram of the process of attaching a protective film to a product to be attached in one embodiment of the present application is shown.

[0039] Figure 3 Shown Figure 2 B is an enlarged schematic diagram of the protective film after it is attached to the product to be bonded.

[0040] Figure 4 A schematic structural diagram of a protective film assembly in an embodiment of the present application is shown.

[0041] Figure 5 A schematic structural diagram of a protective film assembly in another embodiment of the present application is shown.

[0042] Figure 6 A schematic structural diagram of a laminating jig in one embodiment of the present application is shown.

[0043] Figure numerals: 10, protective film assembly; 100, protective film; 110, central part; 120, peripheral part; 121, sub-peripheral part; A, slit part; A1, first slit part; A2, second slit part; A3, third slit part; 130, operating part; 101, protective surface; 200, peeling film; 210, positioning hole; 211, first positioning hole; 212, second positioning hole; 220, first part; 230, second part; 300, product to be bonded; 301, curved surface; 20, support member; 30, pressure head; 31, adsorption hole; 32, alignment hole; 33, holding surface; 40, pin. DETAILED DESCRIPTION

[0044] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0045] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0046] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0047] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0048] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0049] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0050] After research, it was found that when traditional protective films are attached to the curved surface of the product, wrinkles are likely to appear on the edges of the protective film, resulting in the edges of the curved surface of the product not being protected, which in turn causes local stains and scratches on the curved surface of the product. As time goes by, the unprotected part of the edge of the curved surface expands, and the scope of stains and scratches further expands.

[0051] In order to solve the problem that traditional protective films easily cause local stains and scratches on the curved surface of the product during use, the present application designs a protective film with multiple slits arranged on the protective film, which can reduce the probability of wrinkles on the edge of the protective film, improve the protective effect of the protective film, and help maintain the cleanliness of the product to be bonded.

[0052] Figure 1 FIG. 1 shows a schematic structural diagram of a protective film 100 in an embodiment of the present application.

[0053] See also Figure 1 , and refer to Figure 2 and Figure 3 A protective film 100 provided in one embodiment of the present application includes a central portion 110 and a peripheral portion 120 . The peripheral portion 120 is connected to the central portion 110 and is disposed around the central portion 110 .

[0054] Among them, the peripheral portion 120 is provided with a plurality of slit portions A arranged at intervals along the circumferential direction of the peripheral portion 120. The plurality of slit portions A divide the peripheral portion 120 into a plurality of sub-peripheral portions 121. Two adjacent sub-peripheral portions 121 can be staggered along the circumferential direction of the peripheral portion 120 with the help of the corresponding slit portions A so that the two adjacent sub-peripheral portions 121 are at least partially overlapped.

[0055] The surrounding direction of the outer portion 120 is set along the circumference of the central portion 110. For example, if the central portion 110 is defined as a circular structure, the surrounding direction of the outer portion 120 is the direction set around the central axis of the central portion 110.

[0056] A plurality of slit portions A can be formed on the peripheral portion 120 by cutting; a plurality of slit portions A can also be formed on the peripheral portion 120 by shearing; of course, other methods can also be used to form a plurality of slit portions A on the peripheral portion 120, as long as two adjacent sub-peripheral portions 121 can be staggered along the circumferential direction of the peripheral portion 120.

[0057] Since the plurality of slits A divide the outer portion 120 into a plurality of sub-outer portions 121 , a slit A is provided between each pair of adjacent sub-outer portions 121 , and the plurality of sub-outer portions 121 are respectively connected to the central portion 110 , which is beneficial to maintaining the integrity of the protective film 100 .

[0058] When the protective film 100 is attached to the curved surface 301 of the product 300 to be bonded, the two adjacent sub-peripheral portions 121 can be staggered along the circumferential direction of the peripheral portion 120, so that along the circumferential direction of the peripheral portion 120, the two adjacent sub-peripheral portions 121 are at least partially overlapped, and thus, in the two adjacent sub-peripheral portions 121, a portion of the first sub-peripheral portion 121 and a portion of the second sub-peripheral portion 121 respectively cover two connected portions on the curved surface 301 of the product 300 to be bonded, and another portion of the second sub-peripheral portion 121 covers the first sub-peripheral portion 121. In this way, the overlapping portions of the two adjacent sub-peripheral portions 121 form a double protection for the curved surface 301 of the product 300 to be bonded (such as Figure 3 As shown), the probability of wrinkles appearing on the edge of the protective film 100 can be reduced, and it is also beneficial to maintain the cleanliness of the product 300 to be bonded, thereby improving the protective effect of the protective film 100.

[0059] It should be noted that the curved surface is a 3D curved surface, and the curved surface may be a spherical surface or an aspherical 3D curved surface.

[0060] In some embodiments, the central portion 110 has a circular structure, and the slit portion A extends radially along the central portion 110 .

[0061] The central portion 110 can be aligned with the curved surface 301 of the product 300 to be bonded, that is, the central axis of the central portion 110 can coincide with the central axis of the curved surface 301 of the product 300 to be bonded, so that the multiple slit portions A can be well arranged around the central axis of the curved surface 301 of the product 300 to be bonded, and it is convenient to stagger the two adjacent sub-peripheral portions 121 along the circumferential direction of the peripheral portion 120 according to the bonding needs, that is, the two adjacent sub-peripheral portions 121 are staggered along the circumferential direction of the central portion 110. By utilizing the slit portions A extending radially along the central portion 110, the probability of wrinkles on the edge of the protective film 100 can be well reduced, and the protective effect of the protective film 100 can be improved.

[0062] In some embodiments, the plurality of slits A include a first slit A1 and a second slit A2 spaced apart along the circumferential direction of the outer portion 120, wherein the length of the first slit A1 is greater than or less than the length of the second slit A2. The length of a slit A is the length of the slit A along its longitudinal extension.

[0063] It can be understood that the length of the first slit portion A1 is the dimension of the first slit portion A1 along the longitudinal extension direction of the first slit portion A1, and the length of the second slit portion A2 is the dimension of the second slit portion A2 along the longitudinal extension direction of the second slit portion A2.

[0064] Since the length of the first slit portion A1 is greater than or less than the length of the second slit portion A2, that is, the length of the first slit portion A1 and the length of the second slit portion A2 are not equal to each other, it is convenient to adjust according to the need of attaching the protective film 100 to the curved surface 301 of the product 300 to be bonded. Taking the example that the length of the first slit portion A1 is greater than the length of the second slit portion A2, the first slit portion A1 can be set at a position on the protective film 100 where long wrinkles are likely to appear, and the second slit portion A2 can be set at a position on the protective film 100 where short wrinkles are likely to appear. In this way, the longer first slit portion A1 can be used to better reduce the probability of wrinkles appearing at positions on the protective film 100 where wrinkles are likely to appear, thereby better improving the protective effect of the protective film 100.

[0065] For example, along the circumferential direction of the outer portion 120 , the plurality of slits A are alternately arranged in a long and short manner.

[0066] In some embodiments, the central portion 110 has a circular structure, and the multiple slit portions A include two third slit portions A3, which are symmetrically arranged around the central portion 110. Among the multiple slit portions A, the third slit portion A3 has the longest length, and the length of the slit portion A is the dimension of the slit portion A along the longitudinal extension direction of the slit portion A3.

[0067] The length of the third slit A3 is the dimension of the third slit A3 along the longitudinal extension direction of the third slit A3.

[0068] The two third slits A3 are symmetrically arranged with respect to the central portion 110 . It can be understood that the line connecting the two third slits A3 coincides with the center of the central portion 110 .

[0069] Among the multiple slits A, the third slit A3 has the longest length, which can be understood as follows: the length of the third slit A3 is greater than the lengths of the remaining slits A among the multiple slits A except the third slit A3.

[0070] In this way, when the protective film 100 on the product 300 to be bonded needs to be peeled off, the protective film 100 can be peeled off from the product 300 to be bonded better along the third slit portion A3.

[0071] In some embodiments, the distance between the ends of the two third slits A3 close to the central portion 110 is less than or equal to a preset value.

[0072] When it is necessary to remove the protective film 100 on the product 300 to be bonded, one hand (one robot) can remove the protective film 100 along the extension direction of one third slit portion A3, and the other hand (another robot) can remove the protective film 100 along the extension direction of the other third slit portion A3. The distance between the ends of the two third slit portions A3 close to the center portion 110 is controlled within a suitable range, which can easily remove the protective film 100 from the product 300 to be bonded, and is conducive to maintaining the overall structure of the protective film 100 before removing the protective film 100.

[0073] In some embodiments, the preset value is L, and L is 1 mm-2 mm.

[0074] If the preset value is too small, the structural strength of the overall structure of the protective film 100 will be poor before the protective film 100 is removed; if the preset value is too large, it will increase the difficulty of removing the protective film 100 from the product 300 to be bonded; for this reason, the preset value needs to be within an appropriate range, such as 1mm-2mm, which can not only improve the structural strength of the overall structure of the protective film 100 before it is removed, but also make it easy to remove the protective film 100 from the product 300 to be bonded when it is needed.

[0075] In some embodiments, the protective film 100 further includes an operating portion 130 , and the sub-peripheral portion 121 adjacent to the third slit portion A3 is connected to the operating portion 130 .

[0076] When the protective film 100 on the product 300 to be bonded needs to be removed, the operating portion 130 can be clamped by a robot or held by hand to tear the protective film 100 along the extending direction of the third slit A3, thereby removing the protective film 100.

[0077] The protective film 100 further includes two operating portions 130 . Along the circumferential direction of the peripheral portion 120 , two sub-peripheral portions 121 located on opposite sides of one of the third slits A3 are connected to the two operating portions 130 in a one-to-one correspondence.

[0078] When the protective film 100 needs to be removed from the product 300 to be bonded, one hand can pull one of the operating parts 130 (or a robot can hold one of the operating parts 130) and the other hand can pull the other operating part 130 (or another robot can hold the other operating part 130) to tear the central part 110 of the protective film 100 between the two third slits A3 into two parts, thereby peeling the protective film 100 from the product 300 to be bonded.

[0079] See also Figure 4 and Figure 5 A protective film assembly 10 provided in one embodiment of the present application includes the protective film 100 of any of the above embodiments, and a peeling film 200.

[0080] The protective film 100 has a protective surface 101 for being attached to a curved surface 301 of a product 300 to be attached. The release film 200 is releasably disposed on the protective surface 101 of the protective film 100 .

[0081] Before the protective film 100 is attached to the curved surface 301 of the product 300 , the peeling film 200 can be used to protect the protective surface 101 of the protective film 100 , thereby improving the cleanliness of the protective surface 101 of the protective film 100 .

[0082] See also Figure 6 An embodiment of the present application provides a bonding jig, which is applied to the above-mentioned protective film assembly 10. The bonding jig includes a support member 20 and a pressing head 30, wherein the support member 20 is used to adaptively support the product 300 to be bonded, and the pressing head 30 is arranged opposite to the support member 20 along the first direction F1.

[0083] The pressing head 30 is also provided with an adsorption hole 31 for adsorbing and fixing the protective film 100. The adsorption hole 31 is arranged toward the support member 20. The peeling film 200 is provided with at least three positioning holes 210 on the part of the outer periphery of the protective film 100. The pressing head 30 is provided with at least three alignment holes 32 corresponding to the positioning holes 210 one by one. The peeling film 200 is positioned on the pressing head 30 with the aid of the positioning holes 210 and the corresponding alignment holes 32, and the protective film 100 of the protective film assembly 10 positioned and fixed on the pressing head 30 can be aligned with the product 300 to be bonded on the support member 20.

[0084] The first direction F1 is parallel to the gravity direction of the support member 20. Figure 6 In the illustrated embodiment, the first direction F1 is parallel to the up-down direction.

[0085] The number of the positioning holes 210 can be three, four, or more, and is not specifically limited here.

[0086] The product 300 to be bonded can be placed on the support 20, and the curved surface 301 of the product 300 to be bonded is set upward, so that the protective film 100 of the protective film assembly 10 is attached to the side of the pressure head 30 facing the support 20. At this time, the peeling film 200 of the protective film assembly 10 is located on the side of the protective film 100 away from the pressure head 30. Combined with the relationship of three-point fixed surface, at least three positioning holes 210 and corresponding alignment holes 32 can be used to preliminarily position the protective film assembly 10 on the pressure head 30, and then the adsorption holes 31 on the pressure head 30 are used to adsorb and fix the protective film 100 on the side of the pressure head 30 facing the support 20, and then the peeling film 200 and the pressure head 30 are removed. The connection between the pressure heads 30 is performed, and the peeling film 200 is peeled off from the protective film 100, so that the protective surface 101 of the protective film 100 is set toward the curved surface 301 of the product 300 to be bonded. At this time, the protective surface 101 of the protective film 100 can be aligned with the curved surface 301 of the product 300 to be bonded, and then the pressure head 30 is driven to move along the first direction F1 toward the support member 20. In this way, the protective surface 101 of the protective film 100 can be aligned and bonded to the curved surface 301 of the product 300 to be bonded, so as to utilize the protective film 100 to protect the curved surface 301 of the product 300 to be bonded, thereby improving the cleanliness of the curved surface 301 of the product 300 to be bonded.

[0087] Optionally, the laminating jig further includes at least three pins 40 corresponding to the positioning holes 210 one by one, and the pins 40 penetrate the positioning holes 210 and the corresponding alignment holes 32 in sequence to preliminarily position the protective film assembly 10 on the pressure head 30.

[0088] Optionally, the pressing head 30 has a pressing surface 33 arranged toward the support member 20 , and the pressing surface 33 has a curvature corresponding to the curved surface 301 , so as to better align the protective surface 101 of the protective film 100 with the curved surface 301 of the product 300 to be bonded.

[0089] In this embodiment, the bonding jig also includes a driving mechanism, which is connected to the pressing head 30 to drive the pressing head 30 to move toward or away from the support member 20 along the first direction F1, so as to facilitate the alignment of the protective surface 101 of the protective film 100 with the curved surface 301 of the product 300 to be bonded, so as to protect the curved surface 301 of the product 300 to be bonded.

[0090] In some embodiments, the peeling film 200 includes a first part 220 and a second part 230 , wherein the first part 220 is peelably arranged on the protective surface 101 of the protective film 100 , and the second part 230 is arranged around the first part 220 , wherein at least three positioning holes 210 are arranged on the second part 230 .

[0091] In this way, the peeling film 200 can be well positioned and fixed on the pressure head 30, so that the protective film 100 can be well aligned with the product 300 to be bonded, and then the adsorption hole 31 is used to adsorb and fix the protective film 100. While the peeling film 200 is used to protect the protective film 100, the positioning convenience of the protective film 100 can also be improved.

[0092] In some embodiments, the at least three positioning holes 210 include a first positioning hole 211 extending longitudinally along the second direction F2 and a second positioning hole 212 extending longitudinally along the third direction F3. The first direction F1, the second direction F2 and the third direction F3 intersect each other.

[0093] One of the second direction F2 and the third direction F3 is parallel to the length direction of the release film 200 , the other of the second direction F2 and the third direction F3 is parallel to the width direction of the release film 200 , and the first direction F1 is parallel to the thickness direction of the release film 200 .

[0094] The first positioning hole 211 can be used to improve the alignment convenience between the first positioning hole 211 and the corresponding alignment hole 32, and the second positioning hole 212 can be used to improve the alignment convenience between the second positioning hole 212 and the corresponding alignment hole 32. In this way, when the peeling film 200 is positioned and fixed on the pressure head 30, the position of the peeling film 200 can be adjusted along the second direction F2 and / or the third direction F3, thereby better aligning the protective surface 101 of the protective film 100 with the curved surface 301 of the product 300 to be bonded, which is also beneficial for using the protective film 100 to better protect the curved surface 301 of the product 300 to be bonded.

[0095] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0096] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A protective film, characterized in that: The protective film comprises: The central part, which is a circular structure; and a peripheral portion connected to the central portion and arranged around the central portion; The peripheral portion is provided with a plurality of slits arranged at intervals along the circumferential direction of the peripheral portion, the slits extending radially along the central portion, and the plurality of slits divide the peripheral portion into a plurality of sub-peripheral portions. Two adjacent sub-peripheral portions can be staggered along the circumferential direction of the peripheral portion by means of corresponding slits, so that the two adjacent sub-peripheral portions at least partially overlap. The plurality of slits include a first slit and a second slit arranged in a circumferential direction of the peripheral portion, and two third slits symmetrically arranged around the central portion; the length of the first slit is greater than or less than the length of the second slit; the length of the third slit is the longest among the plurality of slits; the length of the slit is the dimension of the slit along the longitudinal extension direction of the slit; The third slit portion is configured to tear the protective film along an extending direction of the third slit portion.

2. The protective film according to claim 1, wherein Along the circumferential direction of the outer periphery, the plurality of slits are alternately arranged in a long and short manner.

3. The protective film according to claim 1 or 2, characterized in that: The distance between the ends of the two third slits close to the central portion is less than or equal to a preset value.

4. The protective film according to claim 3, characterized in that The preset value is 1mm-2mm.

5. The protective film according to claim 1 or 2, characterized in that: The protective film further includes an operating portion, and the sub-peripheral portion adjacent to the third slit portion is connected to the operating portion.

6. The protective film according to claim 5, characterized in that The protective film further includes two operating parts; Along the circumferential direction of the peripheral portion, two sub-peripheral portions located on opposite sides of one of the third slit portions are respectively connected to the two operating portions in a one-to-one correspondence.

7. A protective film assembly, characterized in that: include: The protective film according to any one of claims 1 to 6, wherein the protective film has a protective surface for being attached to a curved surface of a product to be attached; as well as A release film is provided on the protective surface of the protective film in a releasable manner.

8. A laminating jig, characterized in that: The laminating jig is applied to the protective film assembly according to claim 7, and the laminating jig comprises: A support member, for adaptively supporting the product to be bonded; and a pressing head, arranged opposite to the supporting member along a first direction; Wherein, the pressure head is further provided with an adsorption hole for adsorbing and fixing the protective film, and the adsorption hole is arranged toward the support member; The peeling film is provided with at least three positioning holes on the portion located on the periphery of the protective film; The pressure head is provided with at least three alignment holes corresponding to the positioning holes one by one. The peeling film is positioned on the pressure head with the help of the positioning holes and the corresponding alignment holes, and the protective film of the protective film assembly positioned and fixed on the pressure head can be aligned with the product to be bonded on the support member.

9. The laminating jig according to claim 8, characterized in that: The release film comprises: A first portion is releasably provided on the protective surface of the protective film; a second part, arranged around the first part; Wherein, the at least three positioning holes are provided on the second part.

10. The laminating jig according to claim 9, characterized in that: The at least three positioning holes include a first positioning hole extending longitudinally along the second direction, and a second positioning hole extending longitudinally along the third direction; The first direction, the second direction, and the third direction intersect with each other.

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