Mobile terminal with NFC function

Abstract

The embodiment of the utility model provides a mobile terminal with a near field communication (NFC) function, which comprises a back shell, a rear camera module, a decorative ring and an NFC antenna, and is characterized in that the back shell is provided with a mounting hole; the rear camera module is positioned on the front side of the back shell and is exposed in the mounting hole; the decorative ring is located at the edge of the mounting hole, and the decorative ring comprises a non-metal body in a closed ring shape and a metal coating in a non-closed ring shape; the NFC antenna is located on the front side of the back shell and is insulated from the metal coating, the NFC antenna comprises a radiator coil, the outer edge of the radiator coil defines a first area, the outer edge of the decorative ring defines a second area, and orthographic projections of the first area and the second area on the back side surface of the back shell are overlapped. According to the technical scheme of the embodiment of the invention, the near field communication performance of the mobile terminal with the NFC function can be improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of terminal devices, and in particular, to a mobile terminal with a near field communication (NFC) function. Background Art

[0002] NFC is a short-range, high-frequency wireless communication technology that allows contactless point-to-point data transmission between electronic devices. NFC is widely used in various occasions such as mobile payment, Internet of Things, smart driving, and smart industry.

[0003] For mobile terminals with NFC functions, how to improve the near field communication performance thereof is a major research and development direction for those skilled in the art. Utility Model Content

[0004] The embodiment of the present application provides a mobile terminal with an NFC function to improve the performance of its near field communication.

[0005] A mobile terminal with NFC function provided by an embodiment of the present application includes a back shell, a rear camera module, a decorative ring and an NFC antenna, wherein: the back shell has a mounting hole; the rear camera module is located on the front side of the back shell and exposed to the mounting hole; the decorative ring is located at the edge of the mounting hole, the decorative ring includes a non-metallic body in a closed ring shape, and a metal plating layer in a non-closed ring shape; the NFC antenna is located on the front side of the back shell and is insulated from the metal plating layer, the NFC antenna includes a radiator coil, the outer edge of the radiator coil defines a first area, the outer edge of the decorative ring defines a second area, and the first area and the second area overlap in the orthographic projection on the back surface of the back shell.

[0006] According to the technical solution of the embodiment of the present application, since the metal coating of the decorative ring is in a non-closed ring shape and is insulated from the NFC antenna, the induced current generated by the metal coating cannot form a closed loop in the opposite direction to the radiator coil current, and the induced magnetic field of the induced current has little effect on the high-frequency alternating magnetic field. Therefore, the coupling interference of the metal coating on the NFC antenna is small, which can effectively improve the near-field communication performance of the mobile terminal.

[0007] In some embodiments, the orthographic projection of the radiator coil on the back surface of the back shell overlaps with the orthographic projection of the decorative ring on the back surface of the back shell; or, the orthographic projection of the decorative ring on the back surface of the back shell is located on the inner side of the orthographic projection of the radiator coil on the back surface of the back shell; or, the orthographic projection of the radiator coil on the back surface of the back shell is located on the inner side of the orthographic projection of the decorative ring on the back surface of the back shell.

[0008] In these embodiments, the NFC antenna is arranged inside the mobile terminal near the rear camera module. On the one hand, it can radiate and receive electromagnetic waves through the mounting holes of the back shell. On the other hand, it also conforms to the user's action habits of using the NFC function of the mobile terminal, such as making mobile payments, making the operation more convenient.

[0009] In some embodiments, the metal coating includes one or more fractures, and the width of each of the one or more fractures is greater than or equal to 0.03 mm. The fracture is designed to have an appropriate width, which is not only convenient for fully breaking the metal coating, but also convenient for process manufacturing and can improve the manufacturing accuracy.

[0010] In some embodiments, the metal plating layer includes a plurality of fractures, and the plurality of fractures are evenly distributed along the circumference of the decorative ring. When the metal plating layer includes a plurality of fractures, the plurality of fractures can more fully disrupt the direction of the induced current that may be generated by the metal plating layer, thereby further reducing the coupling interference of the metal plating layer to the NFC antenna.

[0011] In some embodiments, the NFC antenna is fixed to the front surface of the back shell. The NFC antenna is in a sheet shape, can be reliably attached to the back shell, and has little effect on the thickness of the mobile terminal.

[0012] In some embodiments, the rear camera module includes a transparent cover plate and at least one camera, wherein the transparent cover plate matches the shape of the mounting hole, the at least one camera is located on the front side of the transparent cover plate, at least a portion of the radiator coil is located between the at least one camera and the transparent cover plate, and the orthographic projection of the radiator coil on the transparent cover plate does not overlap with the orthographic projection of the lens of the at least one camera on the transparent cover plate. In these embodiments, at least a portion of the radiator coil can be located between multiple cameras and the transparent cover plate and avoid the lens of the camera, so that the lens lighting is not affected, and the imaging effect of the rear camera module is not affected.

[0013] In some embodiments, at least a portion of the radiator coil is fixedly connected to the transparent cover. The appearance of the rear camera module and the radiator coil can be designed to be of the same color, so that the radiator coil is not easily observed from the back of the mobile terminal, which can make the appearance of the mobile terminal more beautiful.

[0014] In some embodiments, the mobile terminal further comprises a battery located on the side of the rear camera module facing away from the back shell, wherein the NFC antenna is fixed to the surface of the battery facing the back shell. The NFC antenna is in the form of a sheet, which can be reliably attached to the surface of the battery and has little effect on the thickness of the mobile terminal.

[0015] In some embodiments, the decorative ring is fixedly connected to the rear camera module; or, the decorative ring is fixedly connected to the back shell. The decorative ring can play a decorative role and a certain protective and structural reinforcement role on the rear camera module, and the metal plating of the decorative ring has less coupling interference with the NFC antenna.

[0016] In some embodiments, the decorative ring is a conical ring, and the conical ring is convex relative to the back surface of the back shell, or the conical ring is concave relative to the back surface of the back shell.

[0017] The conical ring can be protruding relative to the back surface of the back shell, so that the rear camera module can also be protruding relative to the back surface of the back shell. In these embodiments, the decorative ring can protect the edge of the rear camera module and strengthen the structure, thereby reducing the wear on the transparent cover of the rear camera module.

[0018] The conical ring may also be concave relative to the back surface of the back shell, so that the back surface of the rear camera module may also be concave relative to the back surface of the back shell. In these embodiments, the decorative ring can protect the edge of the rear camera module and strengthen the structure, and can also serve as a structural transition between the back surface of the back shell and the rear camera module.

[0019] In some embodiments, the metal plating extends to the outer edge of the decorative ring. In this way, at least the wear resistance and mechanical strength of the edge of the decorative ring can be improved, thereby effectively reducing the possibility of fracture of the edge of the decorative ring. In other embodiments, the metal plating can extend to the outer edge and the inner edge of the decorative ring, so that the appearance of the decorative ring is more beautiful and rich in texture, and the wear resistance and mechanical strength of the surface of the decorative ring are better.

[0020] In some embodiments, the non-metallic body includes a plastic body, a ceramic body or a glass body. As the main part of the decorative ring, the non-metallic body can play a major role in protecting and reinforcing the edge of the rear camera module. The use of non-metallic materials can also minimize signal attenuation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1A This is a schematic diagram of the back structure of a mobile terminal according to some embodiments of the present application;

[0022] Figure 1B A schematic diagram of a cross-sectional structure of a mobile terminal according to some embodiments of the present application (the cross-sectional cutting direction is parallel to the long side of the mobile terminal);

[0023] Figure 1C A schematic diagram of the relative positions of a back shell, a decorative ring and a radiator coil of a mobile terminal according to some embodiments of the present application;

[0024] Figure 2This is a schematic diagram of the main structure of an NFC device of a mobile terminal in some embodiments of the present application;

[0025] Figure 3A A schematic diagram of the relative positions of a decorative ring and a radiator coil of a mobile terminal according to some embodiments of the present application;

[0026] Figure 3B A schematic diagram of the relative positions of a decorative ring and a radiator coil of a mobile terminal according to some embodiments of the present application;

[0027] Figure 3C A schematic diagram of the relative positions of a decorative ring and a radiator coil of a mobile terminal according to some embodiments of the present application;

[0028] Figure 3D A schematic diagram of the relative positions of a decorative ring and a radiator coil of a mobile terminal according to some embodiments of the present application;

[0029] Figure 3E A schematic diagram of the relative positions of a decorative ring and a radiator coil of a mobile terminal according to some embodiments of the present application;

[0030] Figure 3F A schematic diagram of the relative positions of a decorative ring and a radiator coil of a mobile terminal according to some embodiments of the present application;

[0031] Figure 4A A schematic diagram of the side structure of a decorative ring of a mobile terminal according to some embodiments of the present application;

[0032] Figure 4B A schematic diagram of a cross-sectional structure of a decorative ring of a mobile terminal according to some embodiments of the present application;

[0033] Figure 5 This is a schematic diagram of the cross-sectional structure of a mobile terminal according to some embodiments of the present application (the cross-sectional cutting direction is parallel to the long side of the mobile terminal).

[0034] Reference numerals:

[0035] 100-mobile terminal; 10-NFC device; 11-back shell; 110-mounting hole; 12-rear camera module; 120-transparent cover;

[0036] 121-camera; 122-positioning mounting piece; 210-voice coil motor; 211-lens; 13-decorative ring; 130-non-metallic body;

[0037] 131-metal plating; 31-break; 14-NFC antenna; 140-radiator coil; 141-ferrite; 1401-feeding end;

[0038] 15-NFC chip; 45-flexible circuit board; 16-battery; 17-frame; 18-display screen; S1-first area; S2-second area. DETAILED DESCRIPTION

[0039] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings.

[0040] The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to be limiting of the present application. As used in the specification and appended claims of the present application, the singular expressions "a", "an", "said", "above", "the" and "this" are intended to also include expressions such as "one or more", unless there is a clear contrary indication in the context.

[0041] References to "one embodiment" or "a specific embodiment" in this specification mean that one or more embodiments of the present application include a particular feature, structure or characteristic described in conjunction with the embodiment. The terms "include", "comprises", "has" and their variations all mean "including but not limited to", unless otherwise specifically emphasized.

[0042] As a short-range high-frequency wireless communication technology, NFC is widely used in various occasions such as mobile payment, Internet of Things, smart driving, and smart industry. The NFC antenna is an important component for mobile terminals to realize the NFC function. In related technologies, some mobile terminals with NFC functions, such as mobile phones or tablets, have NFC antennas located near the rear camera module.

[0043] As people's requirements for the appearance of mobile terminals continue to increase, metal back shells and decorative parts are widely favored due to their good appearance, texture and wear resistance. In some related technologies, a metal decorative ring is provided around the transparent cover plate of the rear camera module of the mobile terminal; in other related technologies, a non-metallic decorative ring is provided around the transparent cover plate of the rear camera module of the mobile terminal, and the surface of the non-metallic decorative ring is provided with a metal coating. When the NFC antenna of the mobile terminal of these related technologies is working, the metal decorative ring or the metal coating will generate an eddy current loop in the opposite direction to the current of the radiator coil, and the induced magnetic field generated by the eddy current loop will cause coupling interference to the signal reception and transmission of the NFC antenna, thereby reducing the performance of the near-field communication of the mobile terminal. In the electromagnetic field, coupling interference refers to the interference formed by the coupling of electromagnetic energy through various channels.

[0044] Therefore, for a mobile terminal with an NFC function, how to improve its near field communication performance is a major research and development direction for those skilled in the art.

[0045] In view of this, an embodiment of the present application provides a mobile terminal with an NFC function to improve the near field communication performance of the mobile terminal. The embodiment of the present application will be described in detail below with reference to the accompanying drawings.

[0046] like Figure 1A and Figure 1B As shown, Figure 1A Schematic diagram of the back structure of the mobile terminal 100 according to some embodiments of the present application. Figure 1B Schematic diagram of the cross-sectional structure of the mobile terminal 100 according to some embodiments of the present application (the cross-sectional cutting direction is parallel to the long side of the mobile terminal 100 ).

[0047] In the embodiment of the present application, the mobile terminal 100 with NFC function includes a back shell 11, a rear camera module 12, a decorative ring 13 and an NFC antenna 14. The back shell 11 has a mounting hole 110, and the rear camera module 12 is located on the front side of the back shell 11 and exposed to the mounting hole 110. The decorative ring 13 is located at the edge of the mounting hole 110, and includes a non-metallic body 130 in a closed ring shape and a metal plating layer 131 in a non-closed ring shape. Figure 1A As shown, the metal plating layer 131 is disconnected at the break 31, so that a closed ring structure cannot be formed. Figure 1B As shown, the NFC antenna 14 is located on the front side of the back shell 11 and is insulated from the metal plating layer 131 . The NFC antenna 14 includes a radiator coil 140 .

[0048] like Figure 1C As shown, it is a schematic diagram of the relative positions of the back shell 11, the decorative ring 13 and the radiator coil 140 of the mobile terminal 100 in some embodiments of the present application. In the embodiments of the present application, the outer edge of the radiator coil 140 defines a first area S1, and the outer edge of the decorative ring 13 defines a second area S2. The orthographic projections of the first area S1 and the second area S2 on the back surface of the back shell 11 overlap, that is, the orthographic projections of the first area S1 and the second area S2 on the back surface of the back shell 11 overlap.

[0049] The embodiment of the present application does not limit the specific product type of the mobile terminal 100. In some embodiments, the mobile terminal 100 with NFC function can be, for example, a mobile phone, a tablet computer, a laptop computer, or a smart wearable device.

[0050] The present application embodiment does not specifically limit the specific structural form of the mobile terminal 100. Figure 1BAs shown, in some embodiments, the mobile terminal 100 may also include a frame 17 fixedly connected to the back shell 11 to form a storage space, a battery 16 located in the storage space, an NFC device (only the NFC antenna 14 of the NFC device is illustrated in the figure) and other circuit electronic components (not shown in the figure), a display screen 18 fixedly connected to the frame 17, and a front camera module (not shown in the figure) arranged around the display area of ​​the display screen 18, and the like.

[0051] In the embodiment of the present application, the "front side" of the mobile terminal 100 or its components can be understood as the side of the mobile terminal 100 or its components facing the user when the user is using the mobile terminal 100; correspondingly, the "back side" (or "rear side") of the mobile terminal 100 or its components can be understood as the side of the mobile terminal 100 or its components facing away from the user when the user is using the mobile terminal 100. The rear camera module 12 is arranged at the mounting hole 110, so when the user is using the mobile terminal 100, the lens 211 of the rear camera module 12 also faces away from the user, so that the user can operate the mobile terminal 100 to achieve rear-camera shooting.

[0052] In the embodiment of the present application, the decorative ring 13 can, on the one hand, decorate the rear camera module 12, making the back of the mobile terminal 100 more beautiful, and on the other hand, can also protect and strengthen the structure of the rear camera module 12. In some embodiments, such as Figure 1B As shown, the decorative ring 13 may protrude from the back surface of the back shell 11, thereby protecting the edge of the rear camera module 12 and strengthening the structure. In some embodiments (these embodiments are not shown in the drawings), the decorative ring may also be recessed on the back surface of the back shell 11, thereby playing a structural transition role between the back surface of the back shell 11 and the rear camera module 12. The shape of the decorative ring 13 is not limited, and can be Figure 1A The circular ring shown may also be in other shapes, such as a square ring, a pentagonal ring, or a hexagonal ring.

[0053] like Figure 1AAs shown, in the embodiment of the present application, the decorative ring 13 includes a non-metallic body 130 in a closed ring shape and a metal coating 131 in a non-closed ring shape, wherein the non-metallic body 130 may be, for example, a plastic body, a ceramic body, or a glass body, and the metal coating 131 may be, for example, a zinc coating, a nickel coating, a chrome coating, or an alloy coating. The metal coating 131 may be made by any process such as electroplating, physical vapor deposition (PVD), or non-continue vacuum made (NCVM). The metal coating 131 may enhance the decorativeness of the decorative ring 13, making its appearance more beautiful and rich in texture. In addition, the metal coating 131 may also enhance the wear resistance and mechanical strength of the surface of the decorative ring 13.

[0054] like Figure 2 As shown, it is a schematic diagram of the main structure of the NFC device 10 of the mobile terminal 100 of some embodiments of the present application. The NFC device 10 generally includes an NFC chip 15 and an NFC antenna 14 electrically connected to the NFC chip 15. The NFC chip 15 is a core component for realizing near field communication, which generally has computing capabilities, may also have certain encryption functions, and may support one or more communication standards. The NFC antenna 14 is a short-range wireless communication antenna based on contactless radio frequency identification (RFID), and generally includes a radiator coil 140. The radiator coil 140 can be formed by winding, printing, or etching processes, and is not limited to the rectangular shape shown in the figure. The feeding end 1401 of the radiator coil 140 is used to connect the NFC chip 15, for example, the NFC chip 15 is connected through a flexible circuit board 45.

[0055] Continue to refer to Figure 2 As shown, in some embodiments of the present application, the NFC antenna 14 may further include a ferrite 141 for improving its performance, the ferrite 141 may be in a sheet shape, and the radiator coil 140 may be disposed on the ferrite 141. Ferrite is a high-temperature sintered ferrite material, which can reduce the absorption of the signal magnetic field by the metal material, and can also effectively increase the sensing distance of the near field communication by increasing the magnetic field strength. In addition, ferrite is also helpful in reducing the interference and damage of electromagnetic radiation to surrounding equipment and personnel.

[0056] In some embodiments of the present application, the NFC device 10 of the mobile terminal 100 can work in any one of the active mode, the passive mode and the bidirectional mode. In the active mode, the NFC device 10 is used as an NFC card reader, which can actively send out a radio frequency field to read and / or write other NFC devices; in the passive mode, the NFC device 10 is used as an NFC tag, which can be read and / or written by other NFC devices; in the bidirectional mode, the NFC devices of the two mobile terminals are both in the active mode, and can actively send out a radio frequency field to establish point-to-point communication, so that data can be exchanged.

[0057] Taking the NFC device 10 of the mobile terminal 100 working in active mode as an example, the communication principle between it and another NFC device is: when the mobile terminal 100 is close to the other NFC device, a high-frequency alternating magnetic field is generated between the antenna of the NFC device 10 of the mobile terminal 100 and the antenna of the other NFC device; thereby, the antenna of the other NFC device generates an induced current to power the chip of the other NFC device; then, the chip of the other NFC device can send the stored data (such as text, links, instructions, etc.) to the chip of the NFC device 10 of the mobile terminal 100 through the antenna; then, the mobile terminal 100 can respond based on the data sent by the other NFC device, such as opening a web page or making a payment.

[0058] In the related art, when the NFC antenna of the mobile terminal is working, the metal decorative ring or metal plating located around the rear camera module will be affected by the high-frequency alternating magnetic field to generate an eddy current loop in the opposite direction to the radiator coil current. The induced magnetic field generated by the eddy current loop will cause coupling interference to the signal reception and transmission of the NFC antenna, thereby reducing the performance of near-field communication.

[0059] In the embodiment of the present application, although the high-frequency alternating magnetic field may excite the metal coating 131 to generate an induced current, since the metal coating 131 of the decorative ring 13 is in a non-closed ring shape and is insulated from the NFC antenna 14, the induced current cannot form a closed loop in the opposite direction of the current of the radiator coil 140. In this way, the induced magnetic field of the induced current has little effect on the high-frequency alternating magnetic field, and the coupling interference of the metal coating 131 to the NFC antenna 14 is small. Therefore, compared with the related art, the design of the embodiment of the present application can effectively improve the near-field communication performance of the mobile terminal 100.

[0060] In addition, since the metal plating layer 131 has little coupling interference with the NFC antenna 14, Figure 1CAs shown, the clearance D between the NFC antenna 14 and the metal plating 131 can be designed to be smaller, so that the overall size of the NFC antenna 14 can be designed to be smaller, which can not only reduce the space occupied inside the mobile terminal 100, but also reduce the coupling interference that may be caused to other electromagnetic components of the mobile terminal 100 (such as 4G / 5G communication antennas, WiFi antennas, or wireless charging coils, etc.).

[0061] like Figure 1B As shown, in the embodiment of the present application, the NFC antenna 14 is arranged inside the mobile terminal 100 near the rear camera module. On the one hand, it can radiate and receive electromagnetic waves through the mounting hole 110 of the back shell 11. On the other hand, it also conforms to the user's action habits of using the NFC function of the mobile terminal 100, such as making mobile payments, making the operation more convenient.

[0062] The embodiment of the present application does not specifically limit the relative position of the radiator coil 140 and the decorative ring 13. FIG. 3A to FIG. 3F As shown, it is a schematic diagram of different relative position designs of the decorative ring 13 and the radiator coil 140 of the mobile terminal 100 in some exemplary embodiments of the present application, all of which are observed from the back side of the mobile terminal 100, wherein the back shell 11 is FIG. 3A to FIG. 3F Omitted and not shown.

[0063] See also FIG. 3A to FIG. 3D As shown, in some embodiments of the present application, the orthographic projection of the radiator coil 140 on the back surface of the back shell 11 overlaps with the orthographic projection of the decoration ring 13 on the back surface of the back shell 11 .

[0064] like Figure 3E As shown, in some other embodiments of the present application, the orthographic projection of the decoration ring 13 on the back surface of the back shell 11 is located inside the orthographic projection of the radiator coil 140 on the back surface of the back shell 11 .

[0065] like Figure 3F As shown, in some other embodiments of the present application, the orthographic projection of the radiator coil 140 on the back surface of the back shell 11 is located inside the orthographic projection of the decoration ring 13 on the back surface of the back shell 11 .

[0066] In the above embodiments, the NFC antenna 14 of the mobile terminal 100 can radiate electromagnetic waves outward through the mounting hole 110 of the back shell 11, and can receive electromagnetic waves radiated by the NFC antenna of the external NFC device through the mounting hole 110 of the back shell 11. In some embodiments of the present application, the back shell 11 can be made of metal or include a metal plating layer, which will hardly affect the near field communication performance of the mobile terminal 100.

[0067] In the embodiment of the present application, the metal coating 131 may include one or more fractures 31. The fractures 31 of the metal coating 131 may be formed by a variety of processes. For example, in some embodiments, in the film forming process of the metal coating 131, the fracture design area is masked, so that the fracture 31 is formed in the fracture design area after the metal coating 131 is formed. For example, in other embodiments, in the film forming process of the metal coating 131, a closed ring-shaped coating is first formed, and then the metal in the fracture design area is removed by, for example, laser engraving or etching, so that the fracture 31 is formed in the fracture design area.

[0068] like FIG. 3A to FIG. 3D As shown, in some embodiments, the width T of the break 31 of the metal plating layer 131 can be designed to be greater than or equal to 0.03 mm, so that it is not only convenient to fully break the metal plating layer 131, but also convenient for process manufacturing and can improve the manufacturing accuracy. In some embodiments, the width T of the break 31 can be designed to be, for example, 0.03 mm, 0.04 mm, or 0.05 mm.

[0069] like Figure 3A In the embodiments shown, the orthographic projection of the radiator coil 140 on the back surface of the back shell 11 overlaps with the orthographic projection of the decorative ring 13 on the back surface of the back shell 11. The metal plating 131 includes a fracture 31, and the orthographic projection of the fracture 31 on the back surface of the back shell 11 can be located inside the orthographic projection of the radiator coil 140 on the back surface of the back shell 11. In other embodiments, the orthographic projection of the fracture 31 on the back surface of the back shell 11 can also be located outside the orthographic projection of the radiator coil 140 on the back surface of the back shell 11.

[0070] In some embodiments of the present application, the metal plating layer 131 may include a plurality of cracks 31, and the plurality of cracks 31 are evenly distributed along the circumference of the decorative ring 13. Figure 3B In the embodiments shown, the orthographic projection of the radiator coil 140 on the back surface of the back shell 11 overlaps with the orthographic projection of the decorative ring 13 on the back surface of the back shell 11. The metal plating 131 includes two slits 31, wherein the orthographic projection of one slit 31 on the back surface of the back shell 11 is located inside the orthographic projection of the radiator coil 140 on the back surface of the back shell 11, and the orthographic projection of the other slit 31 on the back surface of the back shell 11 is located outside the orthographic projection of the radiator coil 140 on the back surface of the back shell 11. The two slits 31 may be distributed in the radial direction of the decorative ring 13, and the extension direction of the two slits 31 may be substantially perpendicular to the long side of the rectangular radiator coil 140.

[0071] like Figure 3CIn the embodiments shown, the orthographic projection of the radiator coil 140 on the back surface of the back shell 11 overlaps with the orthographic projection of the decorative ring 13 on the back surface of the back shell 11. The metal plating 131 includes two fractures 31, wherein the orthographic projection of one fracture 31 on the back surface of the back shell 11 is located inside the orthographic projection of the radiator coil 140 on the back surface of the back shell 11, and the orthographic projection of the other fracture 31 on the back surface of the back shell 11 is located outside the orthographic projection of the radiator coil 140 on the back surface of the back shell 11, and the extension directions of the two fractures 31 form acute angles α and β with the long sides of the rectangular radiator coil 140, respectively.

[0072] like Figure 3D In the embodiments shown, the orthographic projection of the radiator coil 140 on the back surface of the back shell 11 overlaps with the orthographic projection of the decorative ring 13 on the back surface of the back shell 11. The metal plating 131 includes four slits 31, and the four slits 31 are evenly distributed along the circumference of the decorative ring 13. As an example, the orthographic projections of three of the four slits 31 on the back surface of the back shell 11 are located inside the orthographic projection of the radiator coil 140 on the back surface of the back shell 11, and the orthographic projection of the other slit 31 on the back surface of the back shell 11 is located outside the orthographic projection of the radiator coil 140 on the back surface of the back shell 11.

[0073] When the metal plating layer 131 includes a plurality of breaks 31 , the plurality of breaks 31 can more fully disrupt the direction of the induced current that may be generated by the metal plating layer 131 , thereby further reducing the coupling interference of the metal plating layer 131 on the NFC antenna 14 .

[0074] The present application embodiment does not specifically limit the installation structure of the NFC antenna 14. Figure 1B As shown, in some embodiments, the NFC antenna 14 can be fixed to the front surface of the back shell 11, for example, it can be attached to the front surface of the back shell 11 by colloid. The NFC antenna 14 is in sheet shape as a whole, can be reliably attached to the back shell 11, and has little effect on the thickness of the mobile terminal 100.

[0075] In some embodiments, reference Figure 1A and Figure 1B As shown, the rear camera module 12 may include a transparent cover plate 120 and at least one camera 121 ( Figure 1AThe transparent cover plate 120 is not shown in the figure). The transparent cover plate 120 matches the shape of the mounting hole 110 and is exposed on the back surface of the mobile terminal 100. At least one camera 121 is located on the front side of the transparent cover plate 120, at least a part of the radiator coil 140 of the NFC antenna 14 is located between the at least one camera 121 and the transparent cover plate 120, and the orthographic projection of the radiator coil 140 on the transparent cover plate 120 does not overlap with the orthographic projection of the lens 211 of the at least one camera 121 on the transparent cover plate 120.

[0076] like Figure 1A As shown in the figure, the main structure of the camera 121 may include a voice coil motor 210 (VCM) and a lens 211 located in the VCM 210, and the light collecting direction of the lens is toward the back side of the mobile terminal 100. The camera 121 generally also includes components such as sensors and processors, which are not shown in the figure. The VCM 210 is a special form of direct drive motor that can directly convert electrical energy into linear motion mechanical energy, which can drive the lens 211 to move along the optical axis, thereby achieving automatic focus.

[0077] In the embodiment of the present application, the specific number of cameras 121 included in the rear camera module 12 is not limited, for example, it can be one, two, three or four. In some examples, the rear camera module 12 can include at least two of an ultra-wide-angle camera, a telephoto camera, a black and white camera, a depth of field camera, or a macro camera. Multiple cameras 121 can enrich the camera function of the mobile terminal 100 and improve the camera quality of the mobile terminal 100. Figure 1A As shown, when the rear camera module 12 includes a plurality of cameras 121 , the plurality of cameras 121 can be mounted on a positioning mounting member 122 , thereby achieving reliable installation.

[0078] In these embodiments, at least a portion of the radiator coil 140 can be located between the multiple cameras 121 and the transparent cover 120 and avoid the lens 211 of the camera 121. In this way, it will not affect the lighting of the lens 211 and will not affect the imaging effect of the rear camera module 12.

[0079] In some embodiments of the present application, without blocking the lens 211 of the camera 121, at least a portion of the radiator coil 140 can be fixedly connected to the transparent cover 120, for example, by colloid bonding. In some other embodiments of the present application, at least a portion of the radiator coil 140 can also be fixedly connected to the positioning mounting member 122, for example, by colloid bonding. The appearance of the voice coil motor 210, the positioning mounting member 122 and the radiator coil 140 can be designed to be the same or similar color, so that the radiator coil 140 is not easily observed from the back of the mobile terminal 100, which can make the appearance of the mobile terminal 100 more beautiful.

[0080] like Figure 1B and Figure 5 As shown, the mobile terminal 100 generally includes a battery 16, which is located on the side of the rear camera module 12 facing away from the back shell 11. In some embodiments of the present application, Figure 5 As shown, the NFC antenna 14 can be fixed to the side surface of the battery 16 facing the back shell 11, for example, it can be attached to the side surface of the battery 16 facing the back shell 11 by colloid. The NFC antenna 14 is in sheet shape as a whole, can be reliably attached to the surface of the battery 16, and has little effect on the thickness of the mobile terminal 100.

[0081] In some embodiments of the present application, the decorative ring 13 can be fixedly connected to the rear camera module 12. For example, the decorative ring 13 can be bonded and fixed to the edge of the transparent cover plate 120 of the rear camera module 12. In other embodiments of the present application, the decorative ring 13 can be fixedly connected to the back shell 11. For example, the decorative ring 13 can be bonded to the edge of the mounting hole 110 of the back shell. Regardless of the mounting structure adopted by the decorative ring 13, it can play a decorative role and a certain protective and structural strengthening role on the rear camera module 12, and the metal plating 131 of the decorative ring 13 has less coupling interference with the NFC antenna 14.

[0082] Figure 4A and Figure 4B They are schematic diagrams of the side view structure and the cross-sectional structure of the decorative ring 13 of the mobile terminal 100 in some embodiments of the present application, wherein: Figure 4B The cutting direction of the cross-sectional structure shown is along the radial direction of the decorative ring 13. Figure 4A and Figure 4B As shown, in some embodiments of the present application, the decorative ring 13 is a conical ring, that is, its surface exposed on the back of the mobile terminal 100 includes a conical portion.

[0083] In some examples, reference Figure 1B and Figure 5As shown, the conical ring can be convex relative to the back surface of the back shell 11, so that the back surface of the rear camera module 12 can also be convex relative to the back surface of the back shell 11. In these embodiments, the decorative ring 13 can protect the edge of the rear camera module 12 and strengthen the structure, and can reduce the wear of the transparent cover 120 of the rear camera module 12.

[0084] In other examples of the present application (these embodiments are not shown in the drawings), the conical ring may be concave relative to the back surface of the back shell 11. Based on this design, the back surface of the rear camera module 12 may also be concave relative to the back surface of the back shell 11. In this way, the decorative ring 13 can protect the edge of the rear camera module 12 and strengthen the structure, and can also play a role in structural transition between the back surface of the back shell 11 and the rear camera module 12.

[0085] In some embodiments of the present application (these embodiments are not shown in the drawings), the decorative ring 13 can also be designed as a plane ring, whose appearance surface is parallel to the back surface of the back shell 11 or is approximately located in the same plane.

[0086] In some embodiments, Figure 1A , Figure 4A and Figure 4B As shown, the metal plating 131 can be extended to the outer edge of the decorative ring 13. In this way, at least the wear resistance and mechanical strength of the edge of the decorative ring 13 can be improved, thereby effectively reducing the possibility of fracture of the edge of the decorative ring 13. In other embodiments of the present application, the metal plating 131 can be extended to the outer edge and the inner edge of the decorative ring 13, that is, the surface of the decorative ring 13 exposed to the back of the mobile terminal 100 is provided with the metal plating 131. In this way, the appearance of the decorative ring 13 is more beautiful and rich in texture, and the wear resistance and mechanical strength of the surface of the decorative ring 13 are better.

[0087] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A mobile terminal with near field communication (NFC) function, characterized in that: include: A back shell having a mounting hole; A rear camera module, located at the front side of the back shell and exposed to the mounting hole; A decorative ring, located at the edge of the mounting hole, the decorative ring comprising a non-metallic body in a closed ring shape and a metal plating layer in a non-closed ring shape; as well as An NFC antenna is located on the front side of the back shell and is insulated from the metal plating layer. The NFC antenna includes a radiator coil, wherein the outer edge of the radiator coil defines a first area, the outer edge of the decorative ring defines a second area, and the first area and the second area overlap in their orthographic projections on the back surface of the back shell.

2. The mobile terminal according to claim 1, characterized in that: The orthographic projection of the radiator coil on the back surface of the back shell overlaps with the orthographic projection of the decorative ring on the back surface of the back shell; or The orthographic projection of the decorative ring on the back surface of the back shell is located inside the orthographic projection of the radiator coil on the back surface of the back shell; or The orthographic projection of the radiator coil on the back surface of the back shell is located inside the orthographic projection of the decoration ring on the back surface of the back shell.

3. The mobile terminal according to claim 1, characterized in that: The metal coating includes one or more fractures, and the width of each of the one or more fractures is greater than or equal to 0.03 mm.

4. The mobile terminal according to claim 1, characterized in that: The metal plating layer includes a plurality of fractures, and the plurality of fractures are evenly distributed along the circumference of the decorative ring.

5. The mobile terminal according to claim 1, characterized in that: The NFC antenna is fixed to the front surface of the back shell.

6. The mobile terminal according to claim 1, characterized in that: The rear camera module comprises: a transparent cover plate, matching the shape of the mounting hole; and at least one camera, located on the front side of the transparent cover; At least a portion of the radiator coil is located between the at least one camera and the transparent cover plate, and the orthographic projection of the radiator coil on the transparent cover plate does not overlap with the orthographic projection of the lens of the at least one camera on the transparent cover plate.

7. The mobile terminal according to claim 6, characterized in that: At least a portion of the radiator coil is fixedly connected to the transparent cover plate.

8. The mobile terminal according to claim 1, characterized in that: Also includes: The battery is located on a side of the rear camera module facing away from the back shell, wherein the NFC antenna is fixed to a surface of the battery on a side facing the back shell.

9. The mobile terminal according to claim 1, characterized in that: The decorative ring is fixedly connected to the rear camera module; or The decorative ring is fixedly connected to the back shell.

10. The mobile terminal according to claim 1, characterized in that: The decorative ring is a conical ring, and the conical ring is convex relative to the back surface of the back shell, or the conical ring is concave relative to the back surface of the back shell.

11. The mobile terminal according to claim 1, characterized in that: The metal plating extends to an outer edge of the decorative ring.

12. The mobile terminal according to any one of claims 1 to 11, characterized in that: The non-metallic body includes a plastic body, a ceramic body or a glass body.

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