CN107329527B - Mobile terminal protective film, preparation method thereof and mobile terminal - Google Patents
Mobile terminal protective film, preparation method thereof and mobile terminal Download PDFInfo
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- CN107329527B CN107329527B CN201710548250.2A CN201710548250A CN107329527B CN 107329527 B CN107329527 B CN 107329527B CN 201710548250 A CN201710548250 A CN 201710548250A CN 107329527 B CN107329527 B CN 107329527B
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- 230000001681 protective effect Effects 0.000 title claims abstract description 136
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 238000005452 bending Methods 0.000 claims abstract description 26
- 229920000642 polymer Polymers 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims description 31
- 239000000463 material Substances 0.000 claims description 21
- 230000008569 process Effects 0.000 claims description 16
- 238000004080 punching Methods 0.000 claims description 12
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 4
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 4
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 4
- 229920001169 thermoplastic Polymers 0.000 claims description 4
- 239000004416 thermosoftening plastic Substances 0.000 claims description 4
- 238000003475 lamination Methods 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 claims description 2
- 238000007790 scraping Methods 0.000 abstract description 17
- 238000000465 moulding Methods 0.000 description 15
- 229920006254 polymer film Polymers 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000000295 complement effect Effects 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
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- 238000003825 pressing Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1613—Constructional details or arrangements for portable computers
Abstract
The invention provides a mobile terminal protective film, a preparation method and a mobile terminal. The mobile terminal protective film includes: a body portion; the bending part, the bending part sets up on the at least partial outward flange of body portion, the bending part includes arcwall face, lower arcwall face and lateral wall, go up arcwall face with the upper surface of body portion links to each other, lower arcwall face with the lower surface of body portion links to each other, the lateral wall with go up the outer end of arcwall face and the outer end of arcwall face links to each other down, just the lateral wall with have the chamfer between the arcwall face, body portion with the bending part is formed by the polymer. Therefore, the problem of scraping hands at the edge of the protective film can be solved, and the protective effect of the protective film on the curved surface screen can be ensured.
Description
Technical Field
The invention relates to the field of electronic equipment manufacturing, in particular to a mobile terminal protective film, a preparation method and a mobile terminal.
Background
At present, mobile terminals such as mobile phones and tablet computers adopt 2.5D or 3D curved surface screens in order to improve display effects and user experience. For example, the display screen has a planar structure in the center and a certain arc shape at the edge. At present, mobile terminals such as mobile phones, tablet computers and the like in the market are provided with screen protection films for screen protection and hand feeling improvement. Along with the development of 2.5D and 3D curved surface screen, also greatly increased to the needs of 2.5D and 3D curved surface screen's screen protection film, its structure is similar with the structure of curved surface screen, and the center has planar structure promptly, and the edge has certain arc to can laminate more with the curved surface screen, play the guard action, and promote the feel.
However, the 2.5D and 3D curved screen protective films, the preparation method and the mobile terminal still need to be improved.
Disclosure of Invention
The present application is made based on the discovery and recognition by the inventors of the following facts and problems:
at present, the screen protection film for 2.5D and 3D curved surface screens has the problem of edge scraping. The inventors have conducted intensive studies and extensive experiments to find that this is mainly due to the thicker thickness of the protective film. In the preparation process, the protective film is firstly flattened temporarily in a punching die, then extrusion cutting molding is carried out, and the cut surface is the side edge of the protective film. When the protective film is thicker, the scraping hand feeling of the side edge of the protective film is more obvious, and particularly, the sharp angle at the intersection of the two side edges, namely the inflection point is sharper, so that the scraping hand problem is more serious. Therefore, although the thicker protective film has better protective effect on the curved screen, the hand scraping problem brought by the thicker protective film is more serious, so that the hand feeling experience of a user is influenced, and the sales of products is influenced.
In view of the above, the present invention proposes a protective film for a mobile terminal. The mobile terminal protective film includes: a body portion; the bending part, the bending part sets up on the at least partial outward flange of body portion, the bending part includes arcwall face, lower arcwall face and lateral wall, go up arcwall face with the upper surface of body portion links to each other, lower arcwall face with the lower surface of body portion links to each other, the lateral wall with go up the outer end of arcwall face and the outer end of arcwall face links to each other down, just the lateral wall with have the chamfer between the arcwall face, body portion with the bending part is formed by the polymer. Therefore, the problem of scraping hands at the edge of the protective film can be solved, and the protective effect of the protective film on the curved surface screen can be ensured.
In another aspect of the present invention, a method of preparing a protective film for a mobile terminal is provided. According to an embodiment of the invention, the method comprises: forming the polymer so as to form a protective film prefabricated material, wherein at least part of the outer edge of a protective film prefabricated material body part is provided with a bending part, the bending part comprises an upper arc-shaped surface, a lower arc-shaped surface and an outer side wall, the upper arc-shaped surface is connected with the upper surface of the body part, and the lower arc-shaped surface is connected with the lower surface of the body part; and a chamfer is arranged between the upper arc-shaped surface and the outer side wall of the protective film prefabricated material so as to form the protective film. Therefore, the protective film capable of improving the problem of edge scraping and ensuring the protective effect can be obtained by using a simple production process.
In another aspect of the present invention, a mobile terminal is provided. According to an embodiment of the present invention, the mobile terminal includes: the shell is provided with a main board and a memory; the screen is arranged at the top of the shell and connected with the main board, and the edge of the screen is provided with a cambered surface; the mobile terminal protective film described above, wherein the mobile terminal protective film covers the outer surface of the screen. Therefore, the use handfeel of the mobile terminal can be improved.
Drawings
Fig. 1 shows a schematic structure of a protective film for a mobile terminal according to an embodiment of the present invention;
fig. 2 is a schematic view showing a structure of a protective film for a mobile terminal according to another embodiment of the present invention;
fig. 3 shows a schematic cross-sectional view of the protective film of the mobile terminal in the direction B-B' of fig. 2;
fig. 4 shows a schematic cross-sectional view of the protective film of the mobile terminal along the direction C-C' in fig. 2;
fig. 5 is a schematic view showing a part of the structure of the protective film for the mobile terminal in the area a in fig. 1;
fig. 6 shows a schematic structural diagram of a prior art mobile terminal protective film;
fig. 7 shows a flow chart of a method for preparing a protective film for a mobile terminal according to an embodiment of the present invention;
fig. 8 is a schematic structural view showing a mold for preparing a protective film of a mobile terminal according to an embodiment of the present invention;
fig. 9 shows a schematic cross-sectional view of a mold for preparing a protective film of a mobile terminal according to an embodiment of the present invention;
fig. 10 shows a schematic cross-sectional view of a mold for preparing a protective film of a mobile terminal according to an embodiment of the present invention;
fig. 11 shows a partially cross-sectional schematic view of a mold for preparing a protective film for a mobile terminal according to an embodiment of the present invention; and
fig. 12 is a schematic partial cross-sectional view showing a mold for preparing a protective film for a mobile terminal according to an embodiment of the present invention.
Reference numerals:
100: a mobile terminal protective film; 110: a body portion; 120: an upper arc surface; 130: a lower arc surface; 140: chamfering; 150: an outer sidewall; 160: protecting film prefabrication; 210: a female die; 220: a male die; 10: a simulated groove; 21: profiling surface of the female die; 22: a male die profiling surface; 310: an upper die; 320: a lower die; 330: a cutter; 31: upper imitation shaped surface; 32: the lower imitation shape surface.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In one aspect of the present invention, a mobile terminal protective film is provided. Referring to fig. 1, according to an embodiment of the present invention, the mobile terminal protection film 100 includes: the body portion 110 includes a bent portion disposed on at least a portion of an outer edge of the body portion. The bending part comprises an upper arc-shaped surface 120, a lower arc-shaped surface 130 and an outer side wall 150, wherein the upper arc-shaped surface 120 is connected with the upper surface of the body part 110, the lower arc-shaped surface 130 is connected with the lower surface of the body part 110, and the outer side wall 150 is connected with the outer end of the upper arc-shaped surface 120 and the outer end of the lower arc-shaped surface 130. Wherein, a chamfer 140 is provided between the upper arcuate surface 120 and the outer sidewall 150 of the body portion. The range of use of the protective film for a mobile terminal is not particularly limited, and a person skilled in the art may use the protective film according to circumstances. For example, the mobile terminal may be a mobile phone, a tablet computer, a smart watch, and the like. Therefore, the problems of hand scraping at the edge of the protective film, stress concentration caused by bending of the protective film and the like can be solved, the protective effect of the protective film on the curved surface screen can be ensured, and the use handfeel of the mobile terminal is improved.
For easy understanding, the principle of the protection film for improving the hand scraping problem is briefly described:
as mentioned above, in the prior art, the protection film with an arc surface is used to protect the 2.5D and 3D curved screen, and in order to enhance the protection effect on the curved screen, the protection film is generally thickened. The problem of scraping hands at the edge of the protective film becomes more and more obvious along with the increase of the thickness of the protective film. Meanwhile, the thickness is increased, and the problem of stress concentration at the bending part of the arc-shaped surface of the protective film is more remarkable. Specifically, referring to fig. 6, the mobile terminal protection film 100 is composed of a body portion 110, and an upper arc surface 120 and a lower arc surface 130 at the edges thereof. The sharp corners at the intersection of the upper arcuate surface 120 and the outer sidewall 150, i.e., the inflection points, are relatively sharp, thereby making the hand scraping problem more serious. According to an embodiment of the present invention, referring to fig. 1, a transition chamfer 140 is provided at the intersection of the upper arcuate surface 120 and the outer sidewall 150 to smooth the sides of the protective film without sharp corners. Therefore, on one hand, the problem of scraping the edge of the protective film can be solved, and on the other hand, the problem of stress concentration at the bending part can be solved, so that the hand feeling is improved.
The following describes in detail the respective structures of the protective film according to specific embodiments of the present invention:
according to an embodiment of the present invention, the body portion 110 and the bent portion may be formed of a polymer. Specifically, the polymer forming the body portion 110 and the bending portion may include at least one of PET, PMMA, PC, PVC and an optical adhesive. Therefore, the protective film can be prepared by using the common materials, and the cost is saved. According to an embodiment of the present invention, the body portion 110 may include a laminated structure. Therefore, the protection effect of the protection film on the curved surface screen can be improved.
Referring to fig. 2 to 4, according to an embodiment of the present invention, the body part 110 may include a quadrangular body having two symmetrical edges with an upper arc surface 120 and a lower arc surface 130. That is, the body 110 may be rectangular or square. Specifically, referring to fig. 3, along the width direction of the quadrangular body (e.g., rectangular shape), there may be upper arcuate surfaces 120A, 120B and lower arcuate surfaces 130A, 130B. Alternatively, referring to fig. 4, along the length of the quadrilateral body, there may be upper arcuate surfaces 120C, 120D and lower arcuate surfaces 130C, 130D. According to an embodiment of the present invention, the body 110 may be rectangular, and each of 4 edges of the rectangle has a bending portion (including an upper arc surface 120 and a lower arc surface 130). That is, the upper and lower arc surfaces 120 and 130 may be disposed in both the width and length directions of the rectangular body. Specifically, referring to fig. 3 and 4, along the width direction of the rectangular body, there may be upper arcuate surfaces 120A, 120B and lower arcuate surfaces 130A, 130B; along the length of the rectangular body, there may be upper arcuate surfaces 120C, 120D and lower arcuate surfaces 130C, 130D. Therefore, the problem of scraping hands at the edge of the protective film can be improved in all directions, and the hand feeling is improved.
The radian of the upper and lower curved surfaces 120 and 130 on both edges symmetrical with respect to the body part 110 is not particularly limited, and may be designed according to circumstances by those skilled in the art. For example, according to an embodiment of the present invention, the radian of the upper arc surface 120A, 120B (or 120C, 120D) is equal, the radian of the lower arc surface 130A, 130B (or 130C, 130D) is equal, and the radian of the upper arc surface 120 is equal to the radian of the lower arc surface 130, so that a protective film having a relatively uniform thickness at the curved surface can be obtained. Alternatively, it is also possible to design that the radians of the upper arcuate surfaces 120A, 120B (or 120C, 120D) are equal, the radians of the lower arcuate surfaces 130A, 130B (or 130C, 130D) are equal, but the radians of the upper arcuate surface 120 and the lower arcuate surface 130 are not equal, whereby a protective film having a greater thickness at the curved surface bending portion can be obtained.
In accordance with an embodiment of the present invention, referring to fig. 5, in order to achieve a smooth transition of the upper arcuate surface to the outer sidewall, a chamfer is provided between the upper arcuate surface 120 and the outer sidewall 150 to improve the edge scraping problem. According to the embodiment of the present invention, the smaller the angle of the complement angle (angle a as shown in the drawing) of the included angle between the chamfer 140 and the outer sidewall 150, i.e., the more gentle slope of the edge of the protective film 100, the better the effect of improving the edge scraping. And, the problem of excessive stress at the corners and edges can be better alleviated, thereby preventing the mobile terminal protective film 100 from peeling at that location. For example, the complement angle a of the angle between chamfer 140 and outer sidewall 150 may be 10-45 degrees, according to embodiments of the present invention. Therefore, smooth transition of the protective film can be realized, and the problem of edge scraping is solved. According to some preferred embodiments of the present invention, the complement angle a of the angle between chamfer 140 and outer sidewall 150 may be 20-40 degrees. That is, the angle between the chamfer and the outer sidewall may be 135-170 degrees, for example, 140-160 degrees. According to an embodiment of the present invention, the height of the outer sidewall 150 (D as shown in the figures) may be no higher than 0.15mm. The inventors have intensively studied and have found that when the edge outer side wall 150 of the mobile terminal protective film 100 is too high, a user easily feels a more remarkable scratch feeling during use. Therefore, when the height of the outer sidewall 150 is less than 0.15mm, specifically, when the height of the outer sidewall 150 is 0.05 to 0.1mm, the comfort of the protective film in use can be further improved. The height of the outer sidewall 150 is related to the length of the chamfer 140 and the complement angle (angle a) of the outer sidewall 150 and the chamfer 140. That is, the longer the length of the chamfer 140, the smaller the height of the outer sidewall 150 that is ultimately formed, with the angle of the chamfer 140 unchanged; the greater the angle of angle a, the greater the height of the resulting outer sidewall 150, with the length of chamfer 140 unchanged. According to a preferred embodiment of the invention, angle a may be between 20-40 degrees and the height of outer sidewall 150 is less than 0.1mm, for example, 0.05-0.1 mm.
In addition, as can be appreciated by those skilled in the art, the mobile terminal protection film protects the mobile terminal, and since the camera and the receiver are arranged on the upper surface of the mobile terminal, the mobile terminal protection film should be provided with openings at positions corresponding to the camera and the receiver, thereby ensuring the usability of the mobile terminal.
In another aspect of the present invention, a method of preparing a protective film for a mobile terminal is provided. According to an embodiment of the present invention, the mobile terminal protection film prepared by the method may be the mobile terminal protection film described above. Thus, the mobile terminal protective film prepared by the method can have the same characteristics and advantages as the mobile terminal protective film described above, and is not described herein. Referring to fig. 7, according to an embodiment of the present invention, the method includes:
s100: shaping the polymer to form a protective film preform having an upper arcuate surface and a lower arcuate surface
According to an embodiment of the present invention, in this step, the polymer is subjected to a molding process so as to form a protective film preform having a bent portion. As will be appreciated by those skilled in the art, since the protective film prepared by this method may be the protective film described above, the protective film preform may also include a body portion and a bending portion, at least a portion of the outer edge of the body portion being provided with the bending portion, the bending portion including an upper arc surface, a lower arc surface and an outer sidewall, the upper arc surface being connected to the upper surface of the body portion, the lower arc surface being connected to the lower surface of the body portion. The materials for the polymers have been described in detail above and will not be described in detail here. For example, according to an embodiment of the present invention, the polymer may include at least one of PET, PMMA, PC, PVC and an optical adhesive. Therefore, the protective film can be prepared by using the common materials, and the cost is saved. In preparing the protective film preform, the polymer is required to be subjected to a molding process, which may include at least one of a lamination process and a thermoplastic process according to an embodiment of the present invention. It should be noted that the process of molding a polymer is to be understood in a broad sense, and according to an embodiment of the present invention, referring to fig. 9, the process of molding may be a process of molding a polymer film that has been thermoplastic molded to form a bent portion. Alternatively, the molding process may be a process of directly subjecting the polymer to a thermoplastic treatment, and pressing the polymer into a film, and forming the bent portion. When the polymer film is molded, the polymer film may have a large area, and the polymer film may be molded by the female die 210 and the male die 220 to form a bent portion in the planar polymer film. Since the polymer film has a large area, a plurality of protective film preforms connected together can be formed on one polymer film. Thereby, the production efficiency can be further improved. Specifically, referring to fig. 8 and 9, a polymer is first placed in the profiling groove 10 of the female mold 210, and then the male mold 220 and the female mold 210 are subjected to a heat press mold to mold the polymer in the profiling groove 10, thereby preparing the resulting protective film preform 160. It should be noted that, referring to fig. 10, the edge of the profiling groove 10 in the female die 210 has a female die profiling surface 21, and the edge of the male die 220 has a male die profiling surface 22, so that an upper arc surface and a lower arc surface are formed during the hot press die assembly process. Thus, a protective film preform having an upper arc surface and a lower arc surface can be obtained by a simple production process. Those skilled in the art will appreciate that the curvature of the protective film actually produced may not coincide with the curvature during molding because of the resilient nature of the polymer, which may occur after the polymer is heated and pressed. Therefore, in the design process, the radian of the profiling surfaces of the female die and the male die needs to be set to be larger than that of the arc surface of the protective film, so that the bending degree of the finally obtained protective film is the bending radian required to be obtained.
S200: a chamfer is arranged between the upper arc surface and the outer side wall of the protective film prefabricated material so as to form the protective film
According to an embodiment of the present invention, in this step, a chamfer is provided between the upper arc surface and the outer side wall of the protective film preform, so as to form the protective film. According to an embodiment of the present invention, referring to fig. 11, the protective film preform 160 is first fixed between the upper mold 310 and the lower mold 320, and then the edges of the protective film preform 160 are punched with a cutter 330 along the edges (directions indicated by arrows in the drawing) of the upper mold 310 and the lower mold 320. Since the protective film according to the embodiment of the present invention is formed of a polymer, after the die-cutting process, the die-cut edge may undergo a certain degree of elastic rebound. Thereby, a chamfer can be provided simply at the edge of the protective film preform 160 so as to obtain a protective film.
In the prior art, the edges of the upper die and the lower die of the punching die are all plane, so after the protective film prefabricated material is put into the punching die, the lower arc surface of the protective film prefabricated material is parallel to the horizontal plane, and after the protective film prefabricated material is punched by a cutter, the edge of the protective film prefabricated material is the outer side wall along the vertical direction and perpendicular to the lower arc surface, and no transitional chamfer is formed. In the present invention, the protective film preform is die-cut by the die-cutting die (the upper die 310 and the lower die 320) having the arc surface, and the transition chamfer can be simply formed. It should be noted that, because the protective film according to the embodiment of the present invention is a protective film for a 2.5D screen, that is, the edge of the protective film has an arc structure (an upper arc surface and a lower arc surface), and the arc of the arc structure is smaller, the chamfer cannot be prepared at the edge of the upper arc surface by using a conventional side cutting or rotary cutting scheme. According to the method provided by the embodiment of the invention, the chamfer structure can be simply obtained by utilizing the elastic resilience of the polymer material. And moreover, the punching die for preparing the chamfer structure can be obtained by simply improving the existing die, so that the production cost is further saved.
Referring to fig. 12, the edges of the upper mold 310 and the lower mold 320 are cambered surfaces, that is, the edge of the upper mold 310 has the upper surface profile surface 31 and the edge of the lower mold 320 has the lower surface profile surface 32. Also, according to an embodiment of the present invention, the arc of the upper imitation surface 31 is greater than the arc of the upper arc surface of the protective film, and the arc of the lower mold arc surface 32 is greater than the arc of the lower arc surface of the protective film, whereby a chamfer can be formed after the protective film preform is die-cut, thereby improving the hand scraping problem. The radian of the upper imitation surface 31 of the punching die is equal to that of the female die profiling surface for preparing the protective film preform, and the radian of the lower die profiling surface 32 is equal to that of the male die profiling surface, so that the stability of the molding radian can be ensured. In addition, compared with a punching die with a plane edge, the punching die with the arc profiling surface can enable the edge of the protective film to be more matched with the protective film, so that deformation of the protective film prefabricated material in the punching process is avoided.
The radians of the upper and lower imitation surfaces (or the female and male mold imitation surfaces) are not particularly limited as long as they can be matched with the radians of the upper and lower arc surfaces of the prepared protective film, and those skilled in the art can design them according to specific situations. For example, according to the embodiment of the present invention, the curvature of the upper simulated surface and the curvature of the lower simulated surface (or the curvature of the female die profiling surface and the curvature of the male die profiling surface) may be designed to be equal, so that a protective film having a chamfer and having a relatively uniform thickness at the curved surface bending portion may be obtained. Alternatively, the curvature of the upper molding surface and the curvature of the lower molding surface may be designed to be unequal (or the curvature of the female molding surface and the curvature of the male molding surface may be unequal), whereby a protective film having a chamfer and having a greater thickness at the curved surface can be obtained.
The specific materials of the upper mold 310 and the lower mold 320 are not particularly limited. For example, it may be formed of metal. According to one embodiment of the present invention, the upper and lower mold 310 and 320 may be formed of chromium 12 steel or SKD11 steel at the upper and lower simulated surfaces. Therefore, the mechanical strength of the upper imitation surface and the lower imitation surface is guaranteed, and the punching effect is guaranteed. In addition, in order to avoid the impression of the upper die on the surface of the polymer-formed protective film preform during the punching process, a certain clearance gap can be reserved at the edge of the upper profiling surface of the upper die profiling die. According to a specific embodiment of the invention, a clearance space of more than 0.2mm can be reserved at the edge of the upper profiling surface of the imitation shape die. Thereby, the performance of the finally obtained protective film can be further improved. The inventor confirms through a large number of experiments that setting a small gap, such as a gap of 0.003mm, on the single edge of the upper die 310 and the lower die 320 can improve the service lives of the upper die 310 and the lower die 320, and avoid influencing the punching effect due to too tight positions between the upper die 310 and the lower die 320, so as to ensure the product yield.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention. For example, according to a specific embodiment of the present invention, the female die, the male die, and the upper die and the lower die forming the chamfer, which form the protective film preform, may be each formed of metal. According to another embodiment of the invention, the same set of dies can be used for hot press molding of the protective film prefabricated material and preparation of chamfer angles: as described above, the radian of the profile surface of the concave mold and the convex mold, and the radian of the profile surface of the upper mold and the lower mold, respectively, for forming the chamfer, are required to be larger than the edge radian (upper arc surface and lower arc surface) of the finally obtained protective film, so that the radian of the profile surface of the concave mold and the convex mold can be equal to the radian of the profile surface of the upper mold and the lower mold, respectively, for forming the chamfer. Therefore, the same set of die can be used for simply and conveniently realizing hot press molding and chamfer preparation, and finally, the protective film with a preset cambered surface and a chamfer angle is obtained by utilizing the elastic rebound performance of the polymer material.
In another aspect of the present invention, a mobile terminal is provided. According to an embodiment of the present invention, the mobile terminal includes: a housing, a screen and the protective film described above. It should be noted that the type of the mobile terminal is not particularly limited, and may be, for example, a mobile phone, a tablet computer, etc. A main board and a memory are arranged in the shell so as to realize the service performance of the mobile terminal. The screen sets up at the top of casing and links to each other with the mainboard, and the edge of screen has the cambered surface. The protective film covers the outer surface of the screen to provide protection for the screen. Thus, the mobile terminal has all the features and advantages of the protective film described above, and will not be described again here. In general, the use handfeel of the mobile terminal can be improved, and the problem that the edge of the curved screen protective film is easy to peel is solved.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Claims (18)
1. A protective film for a mobile terminal, comprising:
a body portion;
the bending part is arranged on at least part of the outer edge of the body part and comprises an upper arc-shaped surface, a lower arc-shaped surface and an outer side wall, wherein the upper arc-shaped surface is connected with the upper surface of the body part, the lower arc-shaped surface is connected with the lower surface of the body part, the outer side wall is connected with the outer end of the upper arc-shaped surface and the outer end of the lower arc-shaped surface, a chamfer is arranged between the outer side wall and the upper arc-shaped surface, and the chamfer is arranged at the intersection of the upper arc-shaped surface and the outer side wall;
the body portion and the bent portion are formed of a polymer.
2. The mobile terminal protection film according to claim 1, wherein the body part comprises a quadrangular body, and two symmetrical edges of the quadrangular body have the upper arc-shaped surface and the lower arc-shaped surface.
3. The mobile terminal protective film according to claim 1, wherein the body portion comprises a rectangular body, and 4 edges of the rectangular body each have the upper arcuate surface and the lower arcuate surface.
4. A mobile terminal protective film according to claim 2 or 3, wherein the upper arcuate surfaces on the two symmetrical edges in the body portion have equal curvature;
the lower arcuate surfaces on the two symmetrical edges of the body portion have equal curvature.
5. The mobile terminal protective film of claim 1, wherein the polymer comprises at least one of PET, PMMA, PC, PVC and an optical adhesive.
6. The mobile terminal protective film according to claim 5, wherein the body portion comprises a laminated structure.
7. The mobile terminal protective film of claim 1, wherein an angle between the chamfer and the outer sidewall is 135-170 degrees.
8. The mobile terminal protective film of claim 7, wherein an angle between the chamfer and the outer sidewall is 140-160 degrees.
9. The mobile terminal protective film according to claim 7, wherein the height of the outer sidewall is not higher than 0.15mm.
10. The mobile terminal protection film according to claim 9, wherein the height of the outer sidewall is 0.05-0.1 mm.
11. The mobile terminal protective film according to claim 1, wherein the body portion is provided with at least one opening.
12. A method for preparing a protective film for a mobile terminal, comprising:
forming the polymer so as to form a protective film prefabricated material, wherein at least part of the outer edge of a protective film prefabricated material body part is provided with a bending part, the bending part comprises an upper arc-shaped surface, a lower arc-shaped surface and an outer side wall, the upper arc-shaped surface is connected with the upper surface of the body part, and the lower arc-shaped surface is connected with the lower surface of the body part;
chamfer angles are arranged between the upper arc-shaped surface and the outer side wall of the protective film prefabricated material so as to form the protective film; and the chamfer is arranged at the intersection of the upper arc-shaped surface and the outer side wall.
13. The method of claim 12, wherein the forming process comprises at least one of a lamination process and a thermoplastic process.
14. The method of claim 13, wherein the shaping process comprises:
placing a polymer in a profiling groove of a female die;
performing hot press mold clamping on the male mold and the female mold so as to mold the polymer,
the edges of the imitation groove and the male die are provided with profiling surfaces so as to form the upper arc-shaped surface and the lower arc-shaped surface in the process of hot press die assembly.
15. The method of claim 13, wherein the polymer comprises at least one of PET, PMMA, PC, PVC and an optical adhesive.
16. The method of claim 14, wherein the chamfer is provided by:
fixing the protective film prefabricated material between an upper die and a lower die, wherein the edges of the upper die and the lower die are cambered surfaces;
punching the edges of the protective film prefabricated material along the edges of the upper die and the lower die,
the arc surface radian of the edge of the upper die is larger than that of the upper arc surface, and the arc surface radian of the edge of the lower die is larger than that of the lower arc surface.
17. The method of claim 16, wherein the arcuate surface of the upper mold edge has an arc equal to the arc of the contoured surface used to form the upper arcuate surface;
the arc surface radian of the edge of the lower die is equal to the arc surface radian of the profiling surface for forming the lower arc surface.
18. A mobile terminal, comprising:
the shell is provided with a main board and a memory;
the screen is arranged at the top of the shell and connected with the main board, and the edge of the screen is provided with a cambered surface; the mobile terminal protective film of any one of claims 1-11, covering an outer surface of the screen.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710548250.2A CN107329527B (en) | 2017-07-06 | 2017-07-06 | Mobile terminal protective film, preparation method thereof and mobile terminal |
| PCT/CN2018/094421 WO2019007351A1 (en) | 2017-07-06 | 2018-07-04 | Protective film for electronic device and preparation method therefor, and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710548250.2A CN107329527B (en) | 2017-07-06 | 2017-07-06 | Mobile terminal protective film, preparation method thereof and mobile terminal |
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| Publication Number | Publication Date |
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| CN107329527A CN107329527A (en) | 2017-11-07 |
| CN107329527B true CN107329527B (en) | 2024-02-09 |
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| CN201710548250.2A Active CN107329527B (en) | 2017-07-06 | 2017-07-06 | Mobile terminal protective film, preparation method thereof and mobile terminal |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019007351A1 (en) * | 2017-07-06 | 2019-01-10 | Oppo广东移动通信有限公司 | Protective film for electronic device and preparation method therefor, and electronic device |
| WO2020042168A1 (en) * | 2018-08-31 | 2020-03-05 | 华为技术有限公司 | Flexible protective film, curved display screen, and terminal |
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| CN205075418U (en) * | 2014-11-04 | 2016-03-09 | 深圳市华新龙纸品包装有限公司 | A screen protection membrane for touch -sensitive screen |
| CN205195764U (en) * | 2015-11-17 | 2016-04-27 | 钟长川 | Protection film |
| KR20160108088A (en) * | 2015-03-06 | 2016-09-19 | 이병진 | Protective film for electronic device and manufacturing method therof |
| CN206946378U (en) * | 2017-07-06 | 2018-01-30 | 广东欧珀移动通信有限公司 | Mobile terminal diaphragm and mobile terminal |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150169089A1 (en) * | 2013-12-12 | 2015-06-18 | Pedco, LLC | Surface Protection Film and Method of Making a Protection Film for a Touch Screen |
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|---|---|---|---|---|
| CN205075418U (en) * | 2014-11-04 | 2016-03-09 | 深圳市华新龙纸品包装有限公司 | A screen protection membrane for touch -sensitive screen |
| KR20160108088A (en) * | 2015-03-06 | 2016-09-19 | 이병진 | Protective film for electronic device and manufacturing method therof |
| CN205195764U (en) * | 2015-11-17 | 2016-04-27 | 钟长川 | Protection film |
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| CN107329527A (en) | 2017-11-07 |
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