Indicating device of mobile terminal, back film and back film assembly

Abstract

The utility model discloses an indicating device, a back film and a back film assembly of a mobile terminal, the mobile terminal comprises a display surface, a back surface and a connecting ring surface, the connecting ring surface is connected between the display surface and the back surface in a surrounding manner, an NFC antenna is also arranged in the mobile terminal, the indicating device comprises an indicating part and a positioning part, and the indicating part is provided with a first indicating identifier; the positioning part is connected with the indication part, the positioning part comprises a first section and a second section which are connected in a bent mode, the first section is used for being matched and positioned with the first side of the connecting ring surface, and the second section is used for being matched and positioned with the second side of the connecting ring surface, so that the first indication mark is arranged on the back surface to indicate the position of the NFC antenna. According to the invention, the position of the NFC antenna can be accurately indicated through the first indication identifier, so that a user can determine the accurate position of the NFC antenna.

Description

Technical Field

[0001] The present application belongs to the field of mobile terminal accessories, and in particular, relates to an indication device, a back film and a back film assembly of a mobile terminal. Background Art

[0002] With the development of passive power technology, passive devices have gradually become popular. Take passive electronic locks as an example. Passive electronic locks mainly use radio frequency power technology to obtain radio frequency energy from external devices. This type of electronic lock does not require built-in batteries or external power supplies.

[0003] In the related technology, users mainly stick mobile terminals such as mobile phones to the RF antenna of passive devices, and then the mobile phone can transmit RF energy to the passive device through the built-in NFC (Near Field Communication) antenna. However, in actual use, since users cannot accurately determine the position of the NFC antenna, it is difficult to align the NFC antenna of the mobile phone with the passive device, which ultimately leads to low efficiency or even failure of the passive device to obtain RF energy.

[0004] Therefore, the prior art needs to be improved and enhanced. Utility Model Content

[0005] The embodiments of the present application provide an indication device, a back film and a back film assembly of a mobile terminal, so as to facilitate a user to determine the position of an NFC antenna of the mobile terminal.

[0006] The embodiment of the present application provides an indication device of a mobile terminal, the mobile terminal comprising a display surface, a back surface and a connection ring surface, the display surface and the back surface are arranged opposite to each other, the connection ring surface is connected around the display surface and the back surface, the mobile terminal is further provided with an NFC antenna, and the indication device comprises:

[0007] an indication portion, wherein the indication portion is provided with a first indication mark; and

[0008] A positioning portion, the positioning portion is connected to the indicating portion, the positioning portion includes a first section and a second section that are bent and connected, the first section is used to match and position with the first side of the connecting ring surface, and the second section is used to match and position with the second side of the connecting ring surface, so that the first indication mark is set on the back side to indicate the position of the NFC antenna.

[0009] Optionally, the positioning portion also includes a third section, the third section is connected to an end of the second section away from the first section, the second section is used to match and position with a third side of the connecting ring surface, and the first side and the third side are opposite sides of the mobile terminal.

[0010] Optionally, at least one of the first section, the second section and the third section is provided with a card slot, so that the mobile terminal can be snapped into the card slot.

[0011] Optionally, the indicator is connected to an end of the first section close to the second section; and / or,

[0012] The indicating portion is connected to an end of the second section close to the first section.

[0013] Optionally, the first indicator mark includes at least one of a printed pattern, a recessed structure, a raised structure, a hollow structure and an inlay.

[0014] Optionally, the first indicator mark includes a light-emitting unit.

[0015] Optionally, the indicating portion has a first connecting surface, and the first connecting surface is used for bonding or adsorption and fixing to the back surface.

[0016] Optionally, the indicating device further includes a removable portion, the removable portion is connected to the positioning portion, and the removable portion is removably disposed on the first connecting surface, so that the first connecting surface can be attached to the back surface after the removable portion is removed.

[0017] Optionally, a tear-resistant structure is provided at the connection between the indicating portion and the positioning portion; or,

[0018] The indicating portion is detachably connected to the positioning portion.

[0019] Optionally, the positioning portion is provided with at least one avoidance hole, and the avoidance hole is used to avoid at least one of an interface, a button, a sound outlet, a card tray and a sensor of the mobile terminal.

[0020] Optionally, the indicating device is an indicating device of a mobile phone or a handheld tablet computer.

[0021] In a second aspect, an embodiment of the present application further provides a back film of a mobile terminal, wherein the mobile terminal comprises a display surface and a back surface disposed opposite to each other, wherein the back surface comprises a first side edge and a second side edge connected to each other, and an NFC antenna is further disposed in the mobile terminal.

[0022] The back film is provided with a second indication mark;

[0023] The back film also includes a third side and a fourth side that are connected by bending, the third side is used to be adhered to the first side, and the fourth side is used to be adhered to the second side, so that the second indicator mark is arranged on the back to indicate the position of the NFC antenna.

[0024] Optionally, the back film is a back film of a mobile phone or a handheld tablet computer.

[0025] Optionally, the second indicator mark includes at least one of a printed pattern, a concave structure and a convex structure.

[0026] Optionally, the second indicator mark includes a light-emitting unit.

[0027] In a third aspect, the present application also provides a back film assembly, including:

[0028] The backing film as in any of the above items, the backing film comprises a second adhesive surface, the second adhesive surface is used for bonding to the back surface; and,

[0029] A removable piece is removably disposed on the second adhesive surface.

[0030] In the embodiment of the present application, since the first section and the second section are connected by bending, the first side and the second side are connecting ring surfaces or adjacent two sides of the mobile terminal, so that the positioning portion can be stuck at the corner of the mobile terminal, so as to achieve accurate positioning of the indicating device with the corner as a reference point, and finally the first indication mark can accurately indicate the position of the NFC antenna, so that the user can determine the position of the NFC antenna of the mobile terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The technical solution and beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0032] Figure 1 A schematic diagram of the structure of a mobile terminal provided in an embodiment of the present application.

[0033] Figure 2 A schematic diagram of the structure of the first indicating device provided in an embodiment of the present application.

[0034] Figure 3 for Figure 2 A perspective view of the indicating device shown.

[0035] Figure 4 for Figure 2 A usage scenario diagram of the indicating device shown.

[0036] Figure 5 for Figure 2 The indicating device is shown in a cross-sectional view along the AA direction.

[0037] Figure 6 A schematic diagram of the structure of a second indicating device provided in an embodiment of the present application.

[0038] Figure 7 A schematic diagram of the structure of a third indicating device provided in an embodiment of the present application.

[0039] Figure 8 A schematic diagram of the structure of a back film provided in an embodiment of the present application.

[0040] Fig. 9 A schematic structural diagram of a back film assembly provided in an embodiment of the present application.

[0041] The numbers in the figure are:

[0042] 100. Mobile terminal;

[0043] 11. display surface; 12. back surface; 121. first side edge; 122. second side edge; 13. connecting ring surface; 14. camera module;

[0044] 200. indicating device;

[0045] 21. Indicator; 211. First indicator mark; 22. Positioning portion; 221. First section; 222. Second section; 223. Third section; 23. Card slot; 24. Insertion space; 25. Avoidance hole; 26. Removable portion; 27. Easy-tear structure;

[0046] 300, back film;

[0047] 31. Second indicator mark; 32. Third side edge; 33. Fourth side edge;

[0048] 400. Removable parts. DETAILED DESCRIPTION

[0049] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0050] In order to enable those skilled in the art to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0051] It should be noted that, in this document, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0052] Moreover, the terms "comprises," "comprising," or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0053] In the description of the embodiments of the present application, words such as "example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "example" or "for example" in the embodiments of the present application is not to be interpreted as being more preferred or having more advantages than another embodiment or design. The use of words such as "example" or "for example" is intended to present relative concepts in a clear manner.

[0054] In addition, the "plurality" in the embodiments of the present application refers to two or more than two. In view of this, in the embodiments of the present application, "plurality" can also be understood as "at least two". "At least one" can be understood as one or more, for example, one, two or more. For example, including at least one means including one, two or more, and there is no limit on which ones are included. For example, including at least one of A, B and C, then A, B, C, A and B, A and C, B and C, or A, B and C can be included.

[0055] It should be noted that in this application, "and / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / ", unless otherwise specified, generally indicates that the associated objects before and after are in an "or" relationship.

[0056] Please refer to Figure 1 Before introducing the technical solution of the embodiment of the present application, the mobile terminal 100 is first introduced as a whole. The mobile terminal 100 may include a display surface 11 and a back surface 12, and the display surface 11 and the back surface 12 are arranged opposite to each other, so that the mobile terminal 100 can display through the display surface 11. The mobile terminal 100 also includes a connecting ring surface 13, and the connecting ring surface 13 is connected between the display surface 11 and the back surface 12, so that the display surface 11, the back surface 12, and the connecting ring surface 13 can together constitute at least a part of the outer surface of the mobile terminal 100.

[0057] The mobile terminal 100 is provided with an NFC (Near Field Communication) antenna for communicating with external devices.

[0058] Please continue to refer to Figure 2 First, an embodiment of the present application provides an indication device 200 of a mobile terminal 100. The indication device 200 may be an indication device 200 of a mobile phone or a handheld tablet computer. The indication device 200 includes an indication portion 21 and a positioning portion 22. The indication portion 21 is provided with a first indication mark 211. The positioning portion 22 is connected to the indication portion 21, and the positioning portion 22 includes a first section 221 and a second section 222 connected by bending, the first section 221 is used to match and position with the first side of the connecting ring surface 13, and the second section 222 is used to match and position with the second side of the connecting ring surface 13, so that the first indication mark 211 is provided on the back side 12 to indicate the position of the NFC antenna.

[0059] Then, since the first section 221 and the second section 222 are connected by bending, the first side and the second side are the connecting annular surface 13 or the adjacent two sides of the mobile terminal 100, so that the positioning portion 22 can be stuck at the corner of the mobile terminal 100, so as to realize the accurate positioning of the indicating device 200 with the corner as a reference point, and finally the first indication mark 211 can accurately indicate the position of the NFC antenna.

[0060] It should be noted that the first section 221 is used to match and position with the first side of the connecting ring surface 13. The first section 221 and the first side of the connecting ring surface 13 may form a fixed connection, or the first section 221 and the first side of the connecting ring surface 13 may only abut against each other. The embodiment of the present application does not limit this.

[0061] The second section 222 is used to match and position with the second side of the connecting annular surface 13. The second section 222 and the second side of the connecting annular surface 13 may form a fixed connection, or the second section 222 and the second side of the connecting annular surface 13 may only abut against each other. This embodiment of the present application does not limit this.

[0062] Next, the technical solution of the embodiment of the present application is described by taking the example that the positioning portion 22 can be fixed to the mobile terminal 100.

[0063] In some embodiments, the positioning portion 22 is in the shape of an elongated strip, and the positioning portion 22 includes a first section 221 and a second section 222 that are connected by bending.

[0064] Please continue to refer to Figure 3 and Figure 4 In some embodiments, at least one of the first section 221 and the second section 222 is provided with a card slot 23, so that the mobile terminal 100 can be snapped into the card slot 23. Then, in actual use, the positioning portion 22 can be snapped into the mobile terminal 100, so that the indicating portion 21 is also installed and fixed to the mobile terminal 100.

[0065] Exemplarily, the slot 23 may include a first slot provided in the first section 221. For example, the cross section of the first section 221 may be an arc-shaped structure, so that the inner surface of the first section 221 is surrounded to form the first slot.

[0066] Exemplarily, the slot 23 may include a second slot provided in the second section 222. For example, the cross section of the second section 222 may be an arc-shaped structure, so that the inner surface of the second section 222 is surrounded to form the second slot.

[0067] In some embodiments, the positioning portion 22 also includes a third section 223, which is connected to an end of the second section 222 away from the first section 221, and the second section 222 is used to match and position with the third side of the connecting annular surface 13, and the first side and the third side are opposite sides of the mobile terminal 100.

[0068] Furthermore, an insertion space 24 can be formed between the first section 221, the second section 222 and the third section 223, so that the mobile terminal 100 can be inserted and fixed in the insertion space 24, thereby realizing the snap connection of the positioning part 22 to the mobile terminal 100, so that the indication part 21 is also installed and fixed to the mobile terminal 100.

[0069] When the positioning portion 22 further includes the third section 223 , at least one of the first section 221 , the second section 222 and the third section 223 is provided with a card slot 23 , so that the mobile terminal 100 can be connected to the card slot 23 .

[0070] For example, as mentioned above, the card slot 23 may include a first card slot provided in the first section 221 , and the card slot 23 may also include a second card slot provided in the second section 222 .

[0071] Of course, the slot 23 may also include a third slot provided in the third section 223. For example, the cross section of the third section 223 may be an arc-shaped structure, so that the inner surface of the third section 223 is surrounded to form the third slot.

[0072] In some embodiments, the indicator portion 21 is connected to one end of the first section 221 close to the second section 222 .

[0073] It can be understood that, taking the mobile terminal 100 as a mobile phone, the mobile phone is usually also provided with a camera module 14, and the camera module 14 and the NFC antenna are usually arranged side by side on the top of the mobile phone, so that the NFC antenna is biased to one side of the top of the mobile phone. At this time, the indicator 21 is connected to the end of the first section 221 close to the second section 222, which can also be understood as the indicator 21 is biased toward one end of the first section 221; then, when the first section 221 is attached to the top of the mobile phone, the biased indicator 21 can face the biased NFC antenna.

[0074] In some embodiments, the indicator portion 21 is connected to an end of the second section 222 close to the first section 221 .

[0075] It can be understood that, taking the mobile terminal 100 as a mobile phone, the mobile phone is usually also provided with a camera module 14, and the camera module 14 and the NFC antenna are usually arranged side by side on the top of the mobile phone, so that the NFC antenna is biased to one side of the top of the mobile phone. Therefore, the indicator 21 is connected to the end of the second section 222 close to the first section 221, which can also be understood as the indicator 21 is biased toward one end of the second section 222; then, when the first section 221 is attached to the top of the mobile phone, the biased indicator 21 can face the biased NFC antenna.

[0076] In some embodiments, the first indicator mark 211 includes at least one of a printed pattern, a recessed structure, a raised structure, a hollow structure, and an inlay.

[0077] Then, when the first indicator mark 211 includes a printed pattern, the first indicator mark 211 can have the advantages of being easy to shape and having a low manufacturing cost.

[0078] When the first indicator mark 211 includes a concave structure, a convex structure and a hollow structure, the concave and convex structure can improve the user's touch. The concave structure, the convex structure and the hollow structure can be formed by injection molding, engraving, CNC machining, embossing, etc., which is not limited in the embodiment of the present application.

[0079] When the first indicator mark 211 includes an insert, the insert may be placed in an injection mold of the indicator portion 21 , so that the indicator portion 21 having the insert is injection molded.

[0080] In some embodiments, the first indicator mark 211 includes a light-emitting unit to improve the display effect and aesthetics of the first indicator mark 211. The light-emitting unit may include a lamp bead, a fluorescent layer, a fluorescent filler, etc., which is not limited in the embodiment of the present application.

[0081] In some embodiments, the indicator 21 has a first connection surface, and the first connection surface is used to be bonded or adsorbed to the back surface 12. Thus, the indicator 21 can be stably fixed on the back surface 12 to prevent the indicator 21 from shifting or falling off, thereby ensuring that the indicator 21 can accurately indicate the position of the NFC antenna during later use.

[0082] Please continue to refer to Figure 5In some embodiments, the indicating device 200 further includes a removable portion 26, which is connected to the positioning portion 22 and is removably disposed on the first connection surface, so that the first connection surface can be attached to the back surface 12 after the removable portion 26 is removed. In addition, during transportation and packaging, the removable portion 26 can provide effective protection for the first connection surface.

[0083] Exemplarily, the first connecting surface is used for bonding and fixing to the back side 12, and the removable portion 26 may include at least one of a release film and a release paper, so that the first connecting surface can be easily peeled off from the release film or the release paper to remove the removable portion 26 from the first connecting surface.

[0084] Please continue to refer to Figure 6 In some embodiments, a tear-away structure 27 is provided at the connection between the indicator portion 21 and the positioning portion 22. Therefore, after the indicator portion 21 is attached to the back surface 12, the indicator portion 21 and the positioning portion 22 can be disconnected by the tear-away structure 27, so that the positioning portion 22 can be removed from the mobile terminal 100, thereby preventing the mobile terminal 100 from being too large in size or too heavy due to too many external items.

[0085] Exemplarily, the tearable structure 27 may include at least one of a saddle stitch and a score groove.

[0086] The saddle stitch line is formed by forming a row of small holes at the connection between the indicating portion 21 and the positioning portion 22 through a tool such as a needle row, so that the indicating portion 21 and the positioning portion 22 can be easily torn apart along the saddle stitch line.

[0087] The notched groove forms an elongated groove at the connection between the indicating portion 21 and the positioning portion 22, so that the indicating portion 21 and the positioning portion 22 can be easily torn apart along the notched groove.

[0088] In some embodiments, the indicator 21 is detachably connected to the positioning portion 22. Therefore, after the indicator 21 is attached to the back surface 12, the indicator 21 can be disconnected from the positioning portion 22 through the detachable structure, so that the positioning portion 22 can be removed from the mobile terminal 100, thereby preventing the mobile terminal 100 from being too large in size or too heavy due to too many external items.

[0089] Please continue to refer to Figure 7 In some embodiments, the positioning portion 22 is provided with at least one avoidance hole 25, and the avoidance hole 25 is used to avoid at least one of the interface, button, sound outlet, card tray and sensor of the mobile terminal 100.

[0090] Then, after the indicating portion 21 is installed in place, if the positioning portion 22 does not need to be removed, it is possible to prevent the positioning portion 22 from affecting the normal use of the mobile terminal 100 .

[0091] Please continue to refer to Figure 8 The embodiment of the present application also provides a back film 300 of a mobile terminal 100, wherein the mobile terminal 100 includes a display surface 11 and a back surface 12 disposed opposite to each other, wherein the back surface 12 includes a first side edge 121 and a second side edge 122 connected to each other, and an NFC antenna is also disposed inside the mobile terminal 100. The back film 300 is provided with a second indicator mark 31; the back film 300 also includes a third side edge 32 and a fourth side edge 33 connected to each other by bending, wherein the third side edge 32 is used to be attached to the first side edge 121, and the fourth side edge 33 is used to be attached to the second side edge 122, so that the second indicator mark 31 is disposed on the back surface 12 to indicate the position of the NFC antenna.

[0092] Then, since the first side 121 and the second side 122 are connected, the connection between the first side 121 and the second side 122 forms a corner of the mobile terminal 100. Therefore, by using the third side 32 to be attached to the first side 121 and the fourth side 33 to be attached to the second side 122, the back film 300 can be accurately positioned with a corner of the mobile terminal 100 as a reference point, and finally the second indicator mark 31 can accurately indicate the position of the NFC antenna.

[0093] In some embodiments, the second indicator mark 31 includes at least one of a printed pattern, a recessed structure, and a raised structure.

[0094] Then, when the second indicator mark 31 includes a printed pattern, the second indicator mark 31 can have the advantages of easy molding and low manufacturing cost. When the second indicator mark 31 includes a concave structure or a convex structure, the user's touch can be improved by the concave and convex structure. The concave structure and / or the convex structure can be formed by a stamping process, which is not limited in the embodiments of the present application.

[0095] In some embodiments, the second indicator mark 31 includes a light-emitting unit to improve the display effect and aesthetics of the second indicator mark 31. The light-emitting unit may include a lamp bead, a fluorescent layer, a fluorescent filler, etc., which is not limited in the embodiment of the present application.

[0096] The embodiment of the present application further provides a back film assembly, and the back film assembly includes the back film 300 as described above.

[0097] Please continue to refer to Fig. 9In some embodiments, the back film 300 includes a second adhesive surface, and the second adhesive surface is used to be bonded to the back surface 12. The back film assembly also includes a removable member 400, and the removable member 400 is removably disposed on the second adhesive surface. In addition, during transportation and packaging, the removable member 400 can provide effective protection for the first connection surface.

[0098] Exemplarily, the removable member 400 may include at least one of a release film and a release paper, so that the first connecting surface can be easily peeled off from the release film or the release paper to remove the removable portion 26 from the first connecting surface.

[0099] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0100] The above is a detailed introduction to the indication device 200, the back film 300 and the back film assembly of a mobile terminal 100 provided in an embodiment of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and the scope of application. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A pointing device for a mobile terminal, the mobile terminal comprising a display surface, a back surface and a connecting ring surface, the display surface and the back surface are arranged opposite to each other, the connecting ring surface is connected around the display surface and the back surface, and an NFC antenna is also provided in the mobile terminal, characterized in that: The indicating device comprises: an indication portion, wherein the indication portion is provided with a first indication mark; and A positioning portion, the positioning portion is connected to the indicating portion, the positioning portion includes a first section and a second section that are bent and connected, the first section is used to match and position with the first side of the connecting ring surface, and the second section is used to match and position with the second side of the connecting ring surface, so that the first indication mark is set on the back side to indicate the position of the NFC antenna.

2. The indicating device according to claim 1, characterized in that: The positioning portion also includes a third section, which is connected to an end of the second section away from the first section. The second section is used to match and position with a third side of the connecting annular surface. The first side and the third side are opposite sides of the mobile terminal.

3. The indicating device according to claim 2, characterized in that: At least one of the first section, the second section and the third section is provided with a card slot, so that the mobile terminal can be connected to the card slot.

4. The indicating device according to any one of claims 1 to 3, characterized in that: The indicating portion is connected to an end of the first section close to the second section; and / or, The indicating portion is connected to an end of the second section close to the first section.

5. The indicating device according to any one of claims 1 to 3, characterized in that: The first indicator mark includes at least one of a printed pattern, a recessed structure, a raised structure, a hollow structure and an inlay.

6. The indicating device according to any one of claims 1 to 3, characterized in that: The first indicator includes a light emitting unit.

7. The indicating device according to any one of claims 1 to 3, characterized in that: The indicating portion has a first connecting surface, and the first connecting surface is used for bonding or adsorption fixing to the back surface.

8. The indicating device according to claim 7, characterized in that: The indicating device further includes a removable portion, the removable portion is connected to the positioning portion, and the removable portion is removably disposed on the first connecting surface, so that the first connecting surface can be attached to the back surface after the removable portion is removed.

9. The indicating device according to claim 7, characterized in that: The connection between the indicating portion and the positioning portion is provided with an easy-to-tear structure; or, The indicating portion is detachably connected to the positioning portion.

10. The indicating device according to any one of claims 1 to 3, characterized in that: The positioning portion is provided with at least one avoidance hole, and the avoidance hole is used to avoid at least one of the interface, button, sound outlet, card tray and sensor of the mobile terminal.

11. The indicating device according to any one of claims 1 to 3, characterized in that: The indicating device is an indicating device of a mobile phone or a palm tablet computer.

12. A back film of a mobile terminal, the mobile terminal comprising a display surface and a back surface disposed opposite to each other, the back surface comprising a first side edge and a second side edge connected to each other, the mobile terminal further comprising an NFC antenna, characterized in that: The back film is provided with a second indication mark; The back film also includes a third side and a fourth side that are connected by bending, the third side is used to be adhered to the first side, and the fourth side is used to be adhered to the second side, so that the second indicator mark is arranged on the back to indicate the position of the NFC antenna.

13. The backing film according to claim 12, characterized in that: The back film is a back film of a mobile phone or a handheld tablet computer.

14. The backing film according to claim 12 or 13, characterized in that: The second indicator mark includes at least one of a printed pattern, a concave structure and a convex structure.

15. The backing film according to claim 12 or 13, characterized in that: The second indicator includes a light emitting unit.

16. A back film assembly, characterized in that: include: The backing film according to any one of claims 12 to 15, wherein the backing film comprises a second adhesive surface, wherein the second adhesive surface is used for bonding to the back surface; and, A removable piece is removably disposed on the second adhesive surface.

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