Edge grinding jig for optical film
By designing an edge-grinding fixture with a contact area smaller than the surface of the optical film and adjusting its distance from a specific area of the optical film, the problem of peeling off the protective film during the initial tearing stage was solved, thus achieving easy removal of the protective film and reducing the risk of peripheral peeling.
Patent Information
- Application Number
- CN202521592893.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-29
- Publication Date
- 2026-06-23
- Estimated Expiration
- 2035-07-29
Smart Images
Figure CN224390706U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an edge grinding fixture for optical films. Background Technology
[0002] Optical films, such as those used in polarizers, typically have protective films on one or both sides of their main body. These protective films need to be removed before use. However, the protective film has a certain degree of adhesion to the optical film body, which increases the peeling force required during the initial peeling stage, making it difficult to remove the protective film. Utility Model Content
[0003] The purpose of this invention is to provide an edge-grinding fixture for optical films, which can effectively change the peeling force required for the protective film during the initial tearing stage, thereby solving the problem of difficulty in removing the protective film during use.
[0004] This utility model discloses a grinding fixture for optical films, which is used to fix the optical films for grinding. The contact area between the grinding fixture and the optical films is smaller than the surface area of the optical films. At least two sides of the grinding fixture are respectively contracted inward by different distances relative to the corresponding sides of the optical films.
[0005] Optionally, at least one long side of the edge grinding fixture is recessed inward by a first distance relative to the corresponding long side of the optical film, and at least one short side of the edge grinding fixture is recessed inward by a second distance relative to the corresponding short side of the optical film, wherein the first distance is smaller than the second distance.
[0006] Optionally, the first distance is 0.2mm to 5.0mm, and the second distance is 0.2mm to 5.0mm.
[0007] Optionally, the first distance is 0.5 mm and the second distance is 0.8 mm.
[0008] Optionally, at least one corner of the edge grinding fixture is recessed inward by a third distance relative to the corresponding corner of the optical film, and the remaining corner of the edge grinding fixture is recessed inward by a fourth distance relative to the corresponding corner of the optical film, wherein the third distance is greater than the fourth distance.
[0009] Optionally, the third distance is 0.2mm to 5.0mm, and the fourth distance is 0.2mm to 5.0mm.
[0010] Optionally, the third distance is 1.0 mm and the fourth distance is 0.7 mm.
[0011] Optionally, a portion of at least one side of the edge grinding fixture is recessed inward by a fifth distance relative to a corresponding portion of the corresponding side of the optical film. When the portion is a portion of at least one long side of the edge grinding fixture, the fifth distance is greater than the first distance. When the portion is a portion of at least one short side of the edge grinding fixture, the fifth distance is greater than the second distance.
[0012] Optionally, the fifth distance is 0.2mm to 5.0mm.
[0013] Optionally, the fifth distance is 1.0 mm.
[0014] The main differences and effects of this utility model compared with the prior art are as follows:
[0015] This invention, through a rational design of the contact surface between the edge-grinding fixture and the optical film, adjusts the distance from a specific area of the optical film to the edge-grinding fixture during the edge-grinding process, thereby changing the end state of the optical film. This reduces the adhesion between the protective film and the optical film body during the initial tearing stage, effectively altering the peeling force required for the protective film during this stage. This solves the problem of difficult protective film removal during use and reduces the risk of peripheral peeling. This invention has no adverse effects on the size, appearance, or durability of the optical film, is reliable in implementation, compatible with medium to large-sized products, applicable to multiple materials, and has a wide range of applications. Attached Figure Description
[0016] Figure 1 This is a front view showing the edge grinding fixture used for optical films;
[0017] Figure 2 This is a top view showing the edge grinding fixture for an optical film according to the first embodiment;
[0018] Figure 3 This is a top view showing a grinding fixture for optical films according to a first comparative example;
[0019] Figure 4 This is a top view showing a grinding fixture for optical films according to a second comparative example;
[0020] Figure 5 This is a top view showing a grinding fixture for an optical film according to a second embodiment;
[0021] Figure 6 This is a top view showing a grinding fixture for an optical film according to a third embodiment. Detailed Implementation
[0022] To make the objectives and technical solutions of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.
[0023] Embodiments of this utility model relate to an edge grinding fixture for optical films.
[0024] Figure 1 This is a front view showing the edge grinding fixture used for optical films.
[0025] like Figure 1 As shown, the optical film 20 includes an optical film body 20a, an upper protective film 20b, and a lower protective film 20c. The upper protective film 20b and the lower protective film 20c are disposed on the upper and lower sides of the optical film body 20a to protect the optical film body 20a from damage.
[0026] The optical film 20 can be a polarizer or the like, and the optical film body 20a can be a polarizer body or the like. It can be used in any type of electronic device, such as desktop computers, laptops, portable or mobile devices, mobile phones, smartphones, tablets, televisions, set-top boxes or entertainment devices, wearable devices (e.g., display glasses or goggles, watches, headphones, armbands, jewelry, etc.), personal digital assistants (PDAs), media players, gaming devices, etc.
[0027] When applying the optical film 20 to electronic devices, it is necessary to remove the upper protective film 20b and / or the lower protective film 20c. However, the upper protective film 20b and the lower protective film 20c have a certain degree of adhesion to the optical film body 20a, which increases the peeling force required during the peeling stage, thus making it difficult to remove the upper protective film 20b and the lower protective film 20c.
[0028] To solve this problem, the applicant creatively devised a solution by rationally designing the contact surface between the edge grinding fixture and the optical film, and adjusting the distance from a specific area of the optical film to the edge grinding fixture during the edge grinding process. This changes the state of the optical film end, reduces the adhesion between the protective film and the optical film body during the initial tearing stage, and effectively changes the peeling force required for the protective film during the initial tearing stage.
[0029] Continue as Figure 1As shown, the edge grinding fixture 10 is used to fix the optical film 20 for edge grinding. There can be two edge grinding fixtures 10, namely, an upper edge grinding fixture 10a and a lower edge grinding fixture 10b. The upper edge grinding fixture 10a contacts the upper protective film 20b of the optical film 20, and the lower edge grinding fixture 10b contacts the lower protective film 20c of the optical film 20. The upper edge grinding fixture 10a and the lower edge grinding fixture 10b cooperate to fix the optical film 20 for edge grinding.
[0030] At least one of the upper grinding fixture 10a and the lower grinding fixture 10b has a contact area with the optical film 20 that is smaller than the surface area of the optical film 20. Specifically, it can be as follows: Figure 1 As shown, an adjustable range is provided between a specific area (such as its edge) of the optical film 20 and the grinding fixture 10, such that the contact area between the grinding fixture 10 and the optical film 20 is smaller than the surface area of the optical film 20, thereby enabling the change of the end state of the optical film 20 after grinding.
[0031] Figure 2 This is a top view showing a grinding fixture for an optical film according to a first embodiment.
[0032] Figure 2 The grinding jig 10 in the middle can be Figure 1 At least one of the upper grinding fixture 10a and the lower grinding fixture 10b is used for edge grinding. Figure 2 As shown, the grinding fixture 10 includes four sides 101a-101d, wherein at least two of the four sides 101a-101d (such as sides 101a, 101b) are recessed inward by different distances (such as distances d1, d2) relative to the corresponding sides of the optical film 20 (such as the sides 201a, 201b closest to sides 101a, 101b, respectively). In this document, the four sides 201a-201d of the optical film 20 are used as boundaries; the area inside these boundaries is referred to as the interior, and the area outside these boundaries is referred to as the exterior.
[0033] Depend on Figure 2 It can be seen that the contact area between the edge grinding fixture 10 and the optical film 20 is determined by the surface area of the edge grinding fixture 10. Since at least two of the four sides 101a-101d of the edge grinding fixture 10 are respectively contracted inward relative to the corresponding sides of the optical film 20, the surface area of the edge grinding fixture 10 is smaller than the surface area of the optical film 20.
[0034] In one embodiment, two adjacent sides of the four sides 101a-101d are respectively contracted inward by different distances relative to the corresponding sides of the optical film 20, and two opposite sides of the four sides 101a-101d are respectively contracted inward by the same distance relative to the corresponding sides of the optical film 20.
[0035] In another embodiment, two adjacent sides of the four sides 101a-101d are respectively contracted inward by the same distance relative to the corresponding side of the optical film 20, and two opposite sides of the four sides 101a-101d are respectively contracted inward by different distances relative to the corresponding side of the optical film 20.
[0036] In another embodiment, any three of the four sides 101a-101d are respectively contracted inward by different distances relative to the corresponding side of the optical film 20.
[0037] In yet another embodiment, each of the four edges 101a-101d is recessed inward by a different distance relative to the corresponding edge of the optical film 20.
[0038] It is understood that the edge grinding fixture 10 may include other numbers of edges, as long as at least two edges are recessed inward by different distances relative to the corresponding edges of the optical film 20.
[0039] exist Figure 2 In this design, both the grinding fixture 10 and the optical film 20 are rectangular in shape. The long and short sides of these rectangles are respectively the long sides 101a, 101c and the short sides 101b, 101d of the grinding fixture 10, and the long sides 201a, 201c and the short sides 201b, 201d of the optical film 20. The contact area between the grinding fixture 10 and the optical film 20 is the product of the long sides 101a and 101b of the grinding fixture 10, and the surface area of the optical film 20 is the product of the long sides 201a and 201b of the optical film 20. At least one long side 101a of the edge grinding fixture 10 is contracted inward by a first distance d1 relative to the corresponding long side 201a of the optical film 20, and at least one short side 101b of the edge grinding fixture 10 is contracted inward by a second distance d2 relative to the corresponding short side 201b of the optical film 20, wherein the first distance d1 is smaller than the second distance d2.
[0040] The applicant found that if the inward distance is short, the end condition of the optical film 20 is generally good after edge grinding, but the adhesion between the protective film and the optical film body is only slightly reduced, and the peeling force required for the initial tear stage is relatively large. Conversely, if the inward distance is long, the end condition of the optical film 20 is generally poor after edge grinding, but the adhesion between the protective film and the optical film body is reduced, and the peeling force required for the initial tear stage is smaller. However, if the inward distance is too long, the protective film is severely peeled off, resulting in poor quality of the optical film 20. This relationship between the inward distance and the initial tearing peeling force also applies to optical films 20 of various materials and sizes. Therefore, as an example, the first distance d1 is 0.2 mm to 5.0 mm, and the second distance d2 is 0.2 mm to 5.0 mm. More specifically, the first distance d1 is 0.5 mm, and the second distance d2 is 0.8 mm.
[0041] In one embodiment, the two long sides 101a, 101c of the edge grinding fixture 10 are both contracted inward by a first distance d1 relative to the corresponding long sides 201a, 201c of the optical film 20, and the two short sides 101b, 101d of the edge grinding fixture 10 are both contracted inward by a second distance d2 relative to the corresponding short sides 201b, 201d of the optical film 20.
[0042] It is understood that the grinding jig 10 and the optical film 20 can have other shapes (such as square, chamfered rectangle, rectangle with irregular part, etc.), and the shapes of the two can not be exactly the same (such as the shape of the grinding jig 10 being a rectangle, while the shape of the optical film 20 is a chamfered rectangle, rectangle with irregular part, etc.).
[0043] Figure 3 This is a top view showing a grinding fixture for optical films according to the first comparative example.
[0044] like Figure 3 As shown, the four edges 101a-101d of the edge grinding fixture 10 are all recessed inward by the same distance d' relative to the corresponding edges 201a-201d of the optical film 20, and this distance d' is relatively short, for example, 0.2 mm. In this case, the end condition of the edge-ground optical film 20 is good, and the peeling force required for the tearing stage is 0.92 N / 25 mm. This peeling force is relatively large, and there is a problem of difficulty in removing the protective film.
[0045] Figure 4 This is a top view showing a grinding fixture for optical films according to a second comparative example.
[0046] like Figure 4 As shown, the four edges 101a-101d of the edge grinding fixture 10 are all recessed inward by the same distance d” relative to the corresponding edges 201a-201d of the optical film 20, and this distance d” is relatively long, for example, 8 mm. In this case, the end condition of the optical film 20 after edge grinding is poor, and the protective film is severely peeled off. At this point, it is impossible to test the peeling force required for the tearing stage, and the quality of the optical film 20 is poor.
[0047] Return to Figure 2The two long sides 101a and 101c of the edge grinding fixture 10 are both reduced inward by a first distance d1 relative to the corresponding long sides 201a and 201c of the optical film 20, and the two short sides 101b and 101d of the edge grinding fixture 10 are both reduced inward by a second distance d2 relative to the corresponding short sides 201b and 201d of the optical film 20. The first distance d1 is 0.5 mm, and the second distance d2 is 0.8 mm. In this case, the end condition of the edge-ground optical film 20 is good, and the peeling forces required for the tearing stage are 0.31 N / 25 mm (corresponding to tearing from the long sides 201a and 201c of the optical film 20) and 0.14 N / 25 mm (corresponding to tearing from the short sides 201b and 201d of the optical film 20), respectively, thus improving the difficulty in tearing the protective film.
[0048] Figure 5 This is a top view showing a grinding fixture for an optical film according to a second embodiment.
[0049] like Figure 5 As shown, at least two edges 101a, 101b of the edge grinding fixture 10 are recessed inward by a first distance d1 and a second distance d2 relative to the corresponding edges 201a, 201b of the optical film 20. To further reduce the risk of peripheral peeling, at least one corner of the edge grinding fixture 10 (such as corner 102a) is recessed inward by a third distance d3 relative to the corresponding corner of the optical film 20 (such as corner 202a), and the remaining corners of the edge grinding fixture 10 (such as corners 102b-102d) are recessed inward by a fourth distance d4 relative to the corresponding corners of the optical film 20 (such as corners 202b-202d), where the third distance d3 is greater than the fourth distance d4.
[0050] exist Figure 5 In the process, the optical film 20 is rectangular in shape, and the four corners of the rectangle are the four corner portions 202a-202d of the optical film 20. The edge grinding fixture 10 is rectangular in shape, and one corner of the rectangle is removed to form the corner portion 102a of the edge grinding fixture 10. The remaining corners of the rectangle are retained to form the corner portions 202b-202d of the edge grinding fixture 10, such that the third distance d3 by which the corner portion 102a of the edge grinding fixture 10 contracts inward relative to the corresponding corner portion 202a of the optical film 20 is greater than the fourth distance d4 by which the remaining corner portions 102b-102d of the edge grinding fixture 10 contracts inward relative to the corresponding corner portions 202b-202d of the optical film 20.
[0051] As discussed above, the longer the inward distance, the smaller the peeling force required for the tearing stage. Therefore, by further inwardly retracting at least one corner of the edge grinding fixture 10, the corresponding corner of the optical film 20 can be more easily torn relative to the rest of the optical film 20, and the risk of peripheral peeling can be reduced. Any one corner of the rectangular edge grinding fixture 10, any two or three corners, or all corners can be removed to achieve control of the tearing force at a specified location.
[0052] It is understandable that other methods can also be used to design the shape of the edge grinding fixture 10, as long as at least one corner of the edge grinding fixture 10 is recessed inward by a distance greater than the distance the remaining corner of the edge grinding fixture 10 is recessed inward by a distance greater than the distance the corresponding corner of the optical film 20 is recessed inward by.
[0053] As an example, the third distance d3 is 0.2mm to 5.0mm, and the fourth distance d4 is 0.2mm to 5.0mm. More specifically, the third distance d3 is 1.0mm, and the fourth distance d4 is 0.7mm.
[0054] Figure 6 This is a top view showing a grinding fixture for an optical film according to a third embodiment.
[0055] like Figure 6 As shown, at least one long side 101a of the edge grinding fixture 10 is recessed inward by a first distance d1 relative to the corresponding long side 201a of the optical film 20, and at least one short side 101b of the edge grinding fixture 10 is recessed inward by a second distance d2 relative to the corresponding short side 201b of the optical film 20. The first distance d1 is smaller than the second distance d2. To further reduce the risk of peripheral peeling, a portion of at least one side of the edge grinding fixture 10 is recessed inward by a fifth distance d5 relative to a corresponding portion of the corresponding side of the optical film 20. When the portion is a portion of at least one long side 101a of the edge grinding fixture 10, the fifth distance d5 is greater than the first distance d1; when the portion is a portion of at least one short side 101b of the edge grinding fixture 10, the fifth distance d5 is greater than the second distance d2.
[0056] exist Figure 6 In the process, a portion 101a1 of the long side portion 101a of the grinding jig 10 is removed, such that the fifth distance d5 by which this portion 101a1 shrinks inward relative to the corresponding portion 201a1 of the corresponding side portion 201a of the optical film 20 is greater than the distance (i.e., the first distance d1) by which the remaining portions 101a2, 101a3 of the long side portion 101a of the grinding jig 10 shrink inward relative to the corresponding portions 201a2, 201a3 of the corresponding side portion 201a of the optical film 20.
[0057] Figure 6 Not shown, a portion of the short side 101b of the grinding fixture 10 may also be removed, such that the fifth distance d5 by which this portion retracts inward relative to the corresponding portion of the corresponding side 201b of the optical film 20 is greater than the distance by which the remaining portion of the short side 101b of the grinding fixture 10 retracts inward relative to the corresponding portion of the corresponding side 201b of the optical film 20 (i.e., the second distance d2).
[0058] As discussed above, the longer the inward distance, the smaller the peeling force required for the tear initiation stage. Therefore, by further inwardly indenting a portion of at least one edge of the edge grinding fixture 10, the corresponding portion of the corresponding edge of the optical film 20 can be more easily torn relative to the rest of the optical film 20, and the risk of peripheral peeling can be reduced. It is possible to selectively remove a portion of any one edge of the rectangular edge grinding fixture 10, or a portion of any two or three edges of the rectangular edge grinding fixture 10, or a portion of all edges of the rectangular edge grinding fixture 10, thereby achieving control of the tear initiation peeling force at a specified location.
[0059] Although Figure 6 The shape of the removed portion is shown as a rectangle, but it is understood that the shape of this portion is not limited and can be curved, wavy, or irregular. Furthermore, the removed portion can be continuous or segmented along at least one side.
[0060] It is understandable that other means can also be used to design the shape of the edge grinding fixture 10, as long as the distance by which a portion of at least one side of the edge grinding fixture 10 is inwardly contracted relative to the corresponding portion of the corresponding side of the optical film 20 is greater than the distance by which the remaining portion of the edge grinding fixture 10 is inwardly contracted relative to the corresponding portion of the corresponding side of the optical film 20.
[0061] As an example, the fifth distance d5 is 0.2mm to 5.0mm. More specifically, the fifth distance d5 is 1.0mm.
[0062] Although not shown in the attached diagram, it is understandable that... Figure 5 and Figure 6 The relevant designs are combined such that at least one corner of the edge grinding fixture is recessed inward by a greater distance relative to the corresponding corner of the optical film, and a portion of at least one side of the edge grinding fixture is recessed inward by a greater distance relative to the corresponding portion of the corresponding side of the optical film. This solves the problem of difficult removal of the protective film during use while ensuring that the end of the optical film is in good condition, reduces the risk of peripheral peeling, and achieves control of the peeling force at a specified position.
[0063] It should be noted that in the claims and specification of this patent, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one" does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0064] Although the present invention has been illustrated and described with reference to certain preferred embodiments thereof, those skilled in the art should understand that various changes in form and detail may be made thereto without departing from the spirit and scope of the present invention.
Claims
1. A grinding fixture for optical films, characterized in that, The edge grinding fixture is used to fix the optical film for edge grinding; the contact area between the edge grinding fixture and the optical film is smaller than the surface area of the optical film, wherein at least two sides of the edge grinding fixture are respectively contracted inward by different distances relative to the corresponding sides of the optical film.
2. The edge grinding fixture according to claim 1, characterized in that, At least one long side of the edge grinding fixture is recessed inward by a first distance relative to the corresponding long side of the optical film, and at least one short side of the edge grinding fixture is recessed inward by a second distance relative to the corresponding short side of the optical film, wherein the first distance is smaller than the second distance.
3. The edge grinding fixture according to claim 2, characterized in that, The first distance is 0.2mm to 5.0mm, and the second distance is 0.2mm to 5.0mm.
4. The edge grinding fixture according to claim 3, characterized in that, The first distance is 0.5 mm, and the second distance is 0.8 mm.
5. The grinding fixture according to any one of claims 1 to 4, characterized in that, At least one corner of the edge grinding fixture is recessed inward by a third distance relative to the corresponding corner of the optical film, and the remaining corner of the edge grinding fixture is recessed inward by a fourth distance relative to the corresponding corner of the optical film, wherein the third distance is greater than the fourth distance.
6. The edge grinding fixture according to claim 5, characterized in that, The third distance is 0.2mm to 5.0mm, and the fourth distance is 0.2mm to 5.0mm.
7. The edge grinding fixture according to claim 6, characterized in that, The third distance is 1.0 mm, and the fourth distance is 0.7 mm.
8. The grinding fixture according to any one of claims 2 to 4, characterized in that, At least one side portion of the edge grinding fixture is recessed inward by a fifth distance relative to a corresponding portion of the corresponding side portion of the optical film. When the portion is a part of at least one long side portion of the edge grinding fixture, the fifth distance is greater than the first distance. When the portion is a part of at least one short side portion of the edge grinding fixture, the fifth distance is greater than the second distance.
9. The grinding fixture according to claim 8, characterized in that, The fifth distance is 0.2mm to 5.0mm.
10. The edge-grinding fixture according to claim 9, characterized in that, The fifth distance is 1.0 mm.