Portable terminal with magnetic attraction external antenna expansion

Abstract

The utility model discloses a magnetic attraction external antenna expansion portable terminal, which comprises a shell, a magnetic attraction antenna assembly and a coupling assembly, a radio frequency mainboard is arranged in the shell, and the coupling assembly is fixed on the inner side of a rear cover of the shell; the magnetic attraction antenna assembly is placed on the outer side of the rear cover of the shell, and is magnetically attracted with the coupling assembly through the rear cover so as to be fixed on the outer side of the rear cover; the coupling assembly couples a radio frequency signal output by the radio frequency mainboard and then wirelessly transmits the radio frequency signal to the magnetic antenna assembly, and the magnetic antenna assembly emits the radio frequency signal; the magnetic attraction antenna assembly couples received external signals and then wirelessly transmits the external signals to the coupling assembly, and the coupling assembly transmits the external signals to the radio frequency main board. The magnetic attraction antenna assembly and the coupling assembly are fixed on the inner side and the outer side of the rear cover in a magnetic attraction mode, a hole does not need to be formed in the shell or an antenna interface does not need to be exposed, and the problem that a hole needs to be formed in an existing terminal external antenna to expose the interface is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of antennas, and in particular to a portable terminal with a magnetically-attached external antenna extension. Background Art

[0002] Communications technology has evolved from the early days of 2G (second-generation mobile communications) to today's 5G (fifth-generation mobile communications), and the number of antennas in communication terminals has increased from one to over 10. With the rapid development of communications technology, the number of antennas will continue to increase, but the available space inside portable terminals is limited, and the performance of built-in antennas is unlikely to meet future communication quality requirements.

[0003] Most existing external antennas use an SMA (SubMiniature version A) connector. This connector is bulky, taking up considerable space on the motherboard and requiring a rubber plug for protection, which makes the terminal thicker. This makes it particularly unsuitable for thinner and smaller handheld devices. Furthermore, this solution requires a hole in the housing to expose the connector, hindering waterproof design. It also requires an extension cable to be attached to the terminal, making it very inconvenient for handheld mobile devices.

[0004] Therefore existing technology still needs to be improved and improved. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a portable terminal with a magnetic external antenna expansion, so as to solve the problem that the external antenna of the existing terminal needs to have a hole and an exposed interface.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A portable terminal with a magnetic external antenna expansion includes a housing, a radio frequency mainboard disposed within the housing, a magnetic antenna assembly, and a coupling assembly, wherein the coupling assembly is fixed to the inner side of a rear cover of the housing; the magnetic antenna assembly is placed on the outer side of the rear cover of the housing and is magnetically attracted to the coupling assembly via the rear cover to be fixed to the outer side of the rear cover;

[0008] The coupling component couples the radio frequency signal output by the radio frequency mainboard and wirelessly transmits it to the magnetic antenna component, and the magnetic antenna component transmits the radio frequency signal;

[0009] The magnetic antenna component couples the received external signal and wirelessly transmits it to the coupling component, and the coupling component transmits the external signal to the radio frequency mainboard.

[0010] In the portable terminal with magnetic external antenna expansion, the magnetic antenna assembly includes an external antenna plate, a coupling antenna plate and a magnet; the magnet is embedded in the coupling antenna plate, the external antenna plate is fixed on the coupling antenna plate and connected to the coupling antenna plate, the magnet magnetically fixes the coupling antenna plate on the back cover, and the signal transmitted between the external antenna plate and the coupling assembly is coupled and transmitted through the coupling antenna plate.

[0011] In the portable terminal with magnetic external antenna expansion, two welding pins are provided at the bottom of the external antenna board, and two welding holes are provided on the coupling antenna board. The welding pins are inserted into the corresponding welding holes and then welded and fixed to form an electrical connection.

[0012] In the portable terminal with magnetic external antenna expansion, the welding pin is inserted into the welding hole, and a preset gap is provided between the inner side of the welding hole and the welding pin, and solder flows into the welding hole for in-hole welding.

[0013] In the portable terminal with magnetic external antenna expansion, a through hole is provided in the middle of the housing of the coupling antenna board, and the magnet is embedded in the through hole and fixed by clamping or gluing.

[0014] In the portable terminal with magnetic external antenna expansion, the coupling component includes a coupling plate and a signal transmission line. The coupling plate is a PCB board. The back of the PCB board is provided with a metal coupling layer and is fixed to the inner side of the back cover. The front of the PCB board is provided with an insulating layer. A copper connection area is provided in the middle of the insulating layer. Two copper vias are provided at one end of the copper connection area. The copper connection area is electrically connected to the metal coupling layer through the copper vias. The other end of the copper connection area is welded to one end of the signal transmission line. The other end of the signal transmission line is electrically connected to the RF mainboard.

[0015] In the portable terminal with magnetic external antenna expansion, the other end of the signal transmission line is provided with a female connector, which is buckled with the male connector on the radio frequency mainboard.

[0016] In the portable terminal with magnetic external antenna expansion, the coupling plate has the same size as the coupling antenna plate.

[0017] In the portable terminal with magnetic external antenna expansion, a magnetic positioning frame is silk-screened on the outer side of the back cover. The magnetic positioning frame is located opposite to the coupling plate and has the same size as the coupling plate.

[0018] Compared to the prior art, the portable terminal with a magnetic external antenna expansion provided by the present invention includes a shell, a magnetic antenna assembly, and a coupling assembly. A radio frequency mainboard is provided in the shell, and the coupling assembly is fixed to the inner side of the rear cover of the shell; the magnetic antenna assembly is placed on the outer side of the rear cover of the shell and is magnetically fixed to the outer side of the rear cover by magnetic attraction with the coupling assembly through the rear cover; the coupling assembly couples the radio frequency signal output by the radio frequency mainboard and wirelessly transmits it to the magnetic antenna assembly, and the magnetic antenna assembly transmits the radio frequency signal; the magnetic antenna assembly couples the received external signal and wirelessly transmits it to the coupling assembly, and the coupling assembly transmits the external signal to the radio frequency mainboard. The magnetic antenna assembly and the coupling assembly are fixed to the inner and outer sides of the rear cover by magnetic attraction, without the need to open a hole in the shell or expose an external wire interface. The magnetic antenna assembly and the coupling assembly use a coupled wireless transmission method to achieve the reception of external signals and the transmission of radio frequency signals. On the basis of ensuring the signal transceiver function, the problem of the existing terminal external antenna requiring an open hole and an exposed interface is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the inner and outer sides of the back cover provided by the utility model.

[0020] Figure 2 It is a structural schematic diagram of the magnetic antenna assembly provided by the utility model.

[0021] Figure 3 This is a schematic diagram of welding the external antenna plate provided by the present invention on the coupling antenna plate.

[0022] Figure 4 It is a structural schematic diagram of the front and back sides of the coupling assembly provided by the present invention. DETAILED DESCRIPTION

[0023] This utility model provides a portable terminal with a magnetically attached external antenna. To clarify and clarify the objectives, technical solutions, and advantages of this utility model, the following describes this utility model in further detail with reference to the accompanying drawings and examples. It should be understood that the specific examples described herein are intended only to illustrate this utility model and are not intended to limit it.

[0024] Please also see Figures 1 to 4The portable terminal with magnetic external antenna expansion provided by the present invention includes a shell, a magnetic antenna assembly and a coupling assembly, wherein the coupling assembly is fixed on the inner side of the back cover 1 of the shell; the magnetic antenna assembly is placed on the outer side of the back cover of the shell, and is magnetically attracted to the coupling assembly through the back cover 1 to be fixed on the outer side of the back cover 1; a radio frequency mainboard is provided in the shell, and the coupling assembly couples the radio frequency signal output by the radio frequency mainboard and wirelessly transmits it to the magnetic antenna assembly; the magnetic antenna assembly transmits the radio frequency signal, and also couples the received external signal and wirelessly transmits it to the coupling assembly, and the coupling assembly transmits the external signal to the radio frequency mainboard.

[0025] The back cover 1 is a plastic back cover made of non-metallic plastic material, such as polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC) or polycarbonate (PC). The portable terminal is a terminal device such as a smart phone, a portable broadband wireless device (MIFI, Mobile WIFI), etc. This embodiment uses a magnetic attraction method to fix the magnetic antenna component and the coupling component on the inner and outer sides of the back cover. There is no need to open a hole in the shell or expose an external wire interface. The magnetic antenna component and the coupling component use a coupled wireless transmission method to realize the reception of external signals and the transmission of radio frequency signals. On the basis of ensuring the signal receiving and transmitting functions, it solves the problem that the external antenna of the existing terminal needs to open a hole and expose an interface.

[0026] In this embodiment, Figure 2 and Figure 3 As shown, the magnetic antenna assembly includes an external antenna plate 2, a coupling antenna plate 3 and a magnet 4; the magnet 4 is embedded in the coupling antenna plate 3, the external antenna plate 2 is fixed on the coupling antenna plate 3 and connected to the coupling antenna plate 3, the magnet 4 is used to magnetically fix the coupling antenna plate 3 on the back cover 1, and the signal transmitted between the external antenna plate 2 and the coupling assembly is coupled and transmitted through the coupling antenna plate 3.

[0027] Figure 2 The external antenna board 2 shown in the figure is a plate-shaped antenna, that is, the antenna is wrapped in a plate-shaped shell (plastic material), the internal antenna is not visible, and the two ends of the antenna are connected to the two welding pins 5 at the bottom of the external antenna board 2. The coupling antenna board 3 serves as the ground of the antenna. It is a copper plate, and the outside is also wrapped in a plate-shaped shell to play a coupling role. In order to facilitate the display of the bottom surface structure of the coupling antenna board 3, the plate-shaped shell on the bottom surface is removed, as shown in FIG. Figure 2 and Figure 3The dashed line indicates the shaded area. During implementation, this bottom surface will need to be enclosed by a plate-shaped housing. The external antenna and coupled antenna are named according to their functions, and after adding the plate-shaped housing, they are named external antenna plate 2 and coupled antenna plate 3, respectively. Antenna types include PCB (Printed Circuit Board) antennas, PFC (Flexible Printed Circuit) antennas, copper tube antennas, or helical antennas, and their specific types are not limited here. During implementation, the shape of the plate-shaped housing can be adjusted to meet specific requirements.

[0028] When the external antenna plate 2 is fixed on the coupling antenna plate 3, welding is adopted. Specifically, Figure 3 As shown, the two soldering pins 5 at the bottom of the external antenna board 2 are made of copper. The exposed copper on the outside of the soldering pins 5 serves as the soldering area. The coupling antenna board 3 has two soldering holes 6, with copper exposed on the walls of the holes (the coupling antenna board 3 is made of a single copper plate; the copper is exposed after the soldering holes are opened). The soldering pins are inserted into the corresponding soldering holes and then soldered (soldered) to secure them. The copper on the soldering pins connects to the copper in the soldering holes 6 via solder, electrically connecting the two ends of the antenna inside the external antenna board 2 to ground (the copper plate inside the coupling antenna board 3 is equivalent to ground). The coupling antenna board 3 is equivalent to a portion of the external antenna board 2.

[0029] After the soldering pin is inserted into the soldering hole 6, a predetermined gap (e.g., 2-3 mm) is provided between the inner side of the soldering hole and the soldering pin. This facilitates solder flow into the soldering hole 6 for in-hole soldering, preventing solder from being exposed on the coupling antenna board 3 and causing unevenness on the bottom surface of the coupling antenna board 3 (the side that magnetically attracts the rear cover). Preferably, the two soldering pins 5 are separately disposed and located at both ends of the magnet 4, so that they cannot be blocked by the magnet.

[0030] Magnet 4 primarily serves a fixing function, enabling magnetic attraction to the coupling assembly through the back cover. Because the coupling assembly only covers a portion of the inner side of the back cover, areas of the back cover not covered by the coupling assembly are not magnetically attracted. In practice, a through hole can be provided in the center of the coupling antenna plate 3, into which magnet 4 can be inserted, clamped, or glued. The shape of the through hole is adapted to the magnet.

[0031] The magnetic force of magnet 4 is adjusted based on its size. The shape and size of magnet 4 are not restricted, as long as sufficient suction force ensures the external antenna is securely attached to the back cover. When external force is applied, the entire magnetic antenna assembly is removed, facilitating user disassembly and assembly. Because the external antenna plate 2 is positioned upright on the back cover, it acts as an additional bracket on the back of the portable terminal, preventing it from lying flat. Therefore, the magnetic antenna assembly is primarily suitable for use when the portable terminal is handheld, for both signal reception and transmission.

[0032] The magnetic attraction of magnet 4 attracts coupling antenna plate 3 to the coupling assembly through back cover 1, securing coupling antenna plate 3 to back cover 1. Coupling antenna plate 3 uses coupling to transmit signals between external antenna plate 2 and the coupling assembly. Specifically, RF signals received by the coupling assembly are wirelessly transmitted to coupling antenna plate 3, which then transmits them to external antenna plate 2 for transmission. External signals received by external antenna plate 2 are then transmitted to coupling antenna plate 3, which then wirelessly couples them to signal transmission line 8 within the coupling assembly. Through the attraction and fixation of magnet 4, external antenna plate 2 and coupling antenna plate 3 are secured to the back cover, eliminating the need for opening a hole in the portable terminal housing to add an external antenna interface and eliminating the need for an external extension cable, making the portable terminal more convenient to use.

[0033] Please also refer to Figure 4 The coupling assembly includes a coupling plate 7 and a signal transmission line 8. The coupling plate 7 is a PCB board. The back side of the PCB board ( Figure 4 The right side is a schematic diagram of the back side) with a metal coupling layer 12 and fixed (by sticking adhesive) on the inner side of the back cover, the front side of the PCB board ( Figure 4 The left side is a schematic diagram of the front side, with a layer of FR4 substrate (non-conductive) provided with an insulating layer 13, a T-shaped copper contact area 9 is provided in the middle of the insulating layer, and two copper vias 10 are provided at one end of the copper contact area 9. The copper contact area 9 is electrically connected to the metal coupling layer 12 through the copper vias 10, and the other end of the copper contact area 9 is soldered to one end of the signal transmission line 8 with tin. The other end of the signal transmission line 8 is provided with a female connector (coaxial cable connector), which is snapped onto the male connector (RF signal connector, such as the IPEX coaxial connector interface) on the RF mainboard to realize wired signal transmission between the RF mainboard and the mainboard.

[0034] Because the front of the PCB is insulated with an insulating layer 13, only copper vias 10 can transmit signals, without affecting the operation of other components on the mainboard inside the housing. The coupling plate 7 is the same size as the coupling antenna plate 3. To facilitate accurate magnetic attachment of the magnetic antenna assembly, a magnetic positioning frame is screen-printed on the outside of the rear cover. This magnetic positioning frame is positioned opposite the coupling plate 7 and has the same dimensions as the coupling plate 7.

[0035] In order to prevent the signal transmission line 8 from moving, a welding area 11 can be set in the area where the signal transmission line 8 contacts the front surface of the PCB board, and the signal transmission line 8 is welded on the welding area 11 to fix the signal transmission line 8.

[0036] The RF signal output by the RF motherboard is transmitted to the front of the coupling plate through the socket and signal transmission line 8, and then to the back of the coupling plate through the copper via 10. The signal transmission line is a 50Ω coaxial line used to transmit the RF signal, ensuring that the RF signal is transmitted to the coupling plate with low loss. The metal coupling layer is a metal material that is covered with iron, nickel, cobalt, or a combination of these materials, such as iron-plated nickel or iron-plated cobalt. Any metal material that can be attracted by magnets and can transmit the RF signal to the coupling antenna plate 3 through coupling can be used.

[0037] In specific implementation, the metal coupling layer on the back of the coupling plate 7 can be replaced by existing metal parts in the portable terminal (such as camera decoration) or by replacing part of the material of the back cover with metal material.

[0038] In summary, the portable terminal with magnetic external antenna expansion of the utility model uses magnets to magnetically fix the coupling antenna plate and the external antenna plate to the back cover of the portable terminal, and the magnet plays the role of fixing the external antenna. By fixing the antenna with magnets, there is no need to add an external interface, which saves the mainboard space and does not require holes in the shell of the portable terminal. It is suitable for free expansion of the external antenna of a handheld mobile portable terminal without affecting the appearance ID (appearance design in industrial design). When the portable terminal is in use, there is no restriction of external extension cords, and it is more convenient to use. A 50-ohm coaxial cable is used to connect the RF front end (i.e., the RF mainboard). There is no need to consider the circuit layout of the RF mainboard. Only the IPEX coaxial seat interface is reserved to connect to the external antenna, and signal transmission is achieved through wireless coupling.

[0039] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, they can make improvements or changes based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A portable terminal with a magnetic external antenna expansion, comprising a housing, wherein a radio frequency mainboard is arranged in the housing, characterized in that: It also includes a magnetic antenna component and a coupling component, wherein the coupling component is fixed on the inner side of the rear cover of the housing; the magnetic antenna component is placed on the outer side of the rear cover of the housing, and is magnetically attracted to the coupling component through the rear cover to be fixed on the outer side of the rear cover; The coupling component couples the radio frequency signal output by the radio frequency mainboard and transmits it wirelessly to the magnetic antenna component, and the magnetic antenna component transmits the radio frequency signal; The magnetic antenna component couples the received external signal and wirelessly transmits it to the coupling component, and the coupling component transmits the external signal to the radio frequency mainboard.

2. The portable terminal with magnetic external antenna expansion according to claim 1, characterized in that: The magnetic antenna assembly includes an external antenna plate, a coupling antenna plate and a magnet; the magnet is embedded in the coupling antenna plate, the external antenna plate is fixed on the coupling antenna plate and connected to the coupling antenna plate, the magnet magnetically fixes the coupling antenna plate on the back cover, and the signal transmitted between the external antenna plate and the coupling assembly is coupled and transmitted via the coupling antenna plate.

3. The portable terminal with magnetic external antenna expansion according to claim 2, characterized in that: Two welding pins are provided at the bottom of the external antenna board, and two welding holes are provided on the coupling antenna board. The welding pins are inserted into the corresponding welding holes for welding and fixing and electrical connection.

4. The portable terminal with magnetic external antenna expansion according to claim 3, characterized in that: The welding foot is inserted into the welding hole, and there is a preset gap between the inner side of the welding hole and the welding foot, and the solder flows into the welding hole for in-hole welding.

5. The portable terminal with magnetic external antenna expansion according to claim 3, characterized in that: A through hole is provided in the middle of the shell of the coupling antenna plate, and the magnet is embedded in the through hole and clamped or glued and fixed.

6. The portable terminal with magnetic external antenna expansion according to claim 2 or 5, characterized in that: The coupling component includes a coupling plate and a signal transmission line. The coupling plate is a PCB board. A metal coupling layer is provided on the back of the PCB board and is fixed to the inner side of the back cover. An insulating layer is provided on the front of the PCB board. A copper contact area is provided in the middle of the insulating layer. Two copper vias are provided at one end of the copper contact area. The copper contact area is electrically connected to the metal coupling layer through the copper vias. The other end of the copper contact area is welded to one end of the signal transmission line. The other end of the signal transmission line is electrically connected to the RF mainboard.

7. The portable terminal with magnetic external antenna expansion according to claim 6, characterized in that: The other end of the signal transmission line is provided with a female connector, which is buckled with the male connector on the radio frequency main board.

8. The portable terminal with magnetic external antenna expansion according to claim 6, characterized in that: The size of the coupling plate is the same as that of the coupling antenna plate.

9. The portable terminal with magnetic external antenna expansion according to claim 6, characterized in that: A magnetic positioning frame is silk-screened on the outer side of the rear cover. The position of the magnetic positioning frame is opposite to the coupling plate and the size is the same as that of the coupling plate.

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