Electromagnetic protection structure and electronic equipment

Abstract

The embodiment of the invention provides an electromagnetic protection structure and electronic equipment. The electromagnetic protection structure comprises a first structural member, and the first structural member comprises a radio frequency source; a first current path is coupled between the second structural member and the first structural member, the first current path comprises a non-linear area, and when the coupling current of the radio frequency source passes through the non-linear area, the non-linear area generates a non-linear effect; and the conductive medium is electrically connected with the first structural member and the second structural member to form a second current path between the second structural member and the first structural member, so that at least one part of coupling current of the radio frequency source flows to the second structural member from the first structural member through the second current path. In the embodiment of the invention, the second current path formed by the conducting medium can shunt the first current path, and the non-linear effect on the first current path is eliminated or weakened, so that the electromagnetic compatibility problem of the electronic equipment caused by the non-linear effect is solved.

Description

Technical Field

[0001] The present application relates to the field of terminal technology, and in particular to an electromagnetic protection structure and electronic equipment. Background Art

[0002] Electronic devices such as mobile phones, tablet computers, and personal computers often contain some components with complex structures. For example, a folding screen mobile phone will contain a hinge component to achieve the folding of the body; a mobile phone with a liftable camera module will contain a lifting component to achieve the lifting of the camera module.

[0003] In order to achieve its function, each component will include one or more devices. There may be different contact modes between the various devices and between the devices and other structures of the electronic device, such as stable contact or unstable contact. Stable contact means that two contacting devices will not move relative to each other, and unstable contact means that two contacting devices can move relative to each other.

[0004] Electronic devices may include radio frequency devices such as antennas to achieve wireless communication functions. When the antenna transmits electromagnetic wave signals, coupling currents are generated on the conductive devices around it, and the coupling currents are transmitted between the conductive devices inside the electronic device. When the coupling current flows between devices with unstable contact, nonlinear effects are generated in the contact area of ​​the devices, which can cause electromagnetic compatibility problems in electronic devices. Summary of the invention

[0005] The embodiments of the present application provide an electromagnetic protection structure and an electronic device to solve the electromagnetic compatibility problem of electronic devices such as mobile phones caused by nonlinear effects.

[0006] In the first aspect, an embodiment of the present application provides an electromagnetic protection structure. The electromagnetic protection structure includes: a first structural member, a second structural member, and a conductive medium. Among them, the first structural member may include a radio frequency source, and the radio frequency source may be a device such as an antenna that can generate electromagnetic waves. When the radio frequency source receives and transmits electromagnetic waves, a coupling current will be generated in the first structural member. A first current path is coupled between the second structural member and the first structural member, and the first current path includes a nonlinear region. When the coupling current passes through the nonlinear region, a nonlinear effect will be generated. The conductive medium is electrically connected to the first structural member and the second structural member to form a second current path between the second structural member and the first structural member, so that at least a part of the coupling current of the radio frequency source will flow from the first structural member to the second structural member through the second current path.

[0007] It can be seen that in the embodiment of the present application, the second current path formed by the conductive medium can shunt the first current path, eliminate or weaken the nonlinear effect on the first current path, thereby solving the electromagnetic compatibility problem of the electronic equipment caused by the nonlinear effect.

[0008] In one implementation, the nonlinear region includes an unstable contact region between at least two devices on the first current path, wherein relative displacement can occur between the at least two devices forming the unstable contact region.

[0009] In one implementation, the electromagnetic protection structure also includes: a first connector, the first connector is electrically connected to the first structural member and the second structural member to form a first current path. The nonlinear region includes: an unstable contact region between at least two devices in the first connector, and / or an unstable contact region between the first connector and the first structural member, and / or an unstable contact region between the first connector and the second structural member. The first connector can be, for example, a hinge assembly in a folding screen electronic device, a lifting assembly in an electronic device with a lifting camera module, etc. The current path formed by the first connector is used as the first current path, and the second current flow formed by the conductive medium is used for shunting, which can eliminate or weaken the nonlinear effects on the hinge assembly and the lifting assembly.

[0010] In one implementation, the conductive medium covers the surfaces of the first structural member, the second structural member and the first connecting member, so that the conductive medium can also form an electrical connection with the first connecting member, further dividing the current in the first connecting member and improving the shunting effect of the second current path.

[0011] In one implementation, the distance between the conductive medium and the edge of the first structural member is smaller than the distance between the first connecting member and the edge of the first structural member. With such a structure, the length of the second current path is shorter than that of the first current path, and the impedance is also lower, which is conducive to improving the shunting effect of the conductive medium.

[0012] In one implementation, an electromagnetic protection structure is applied to a folding screen electronic device; the folding screen electronic device includes a first middle frame, a second middle frame and a hinge assembly; the first middle frame and the second middle frame are distributed on both sides of the hinge assembly; the first middle frame and the second middle frame are respectively connected to the hinge assembly; the nonlinear region includes: an unstable contact region between at least two devices in the hinge assembly. The electromagnetic protection structure is applied to a folding screen electronic device, and can shunt the coupling current on the hinge assembly, thereby eliminating or weakening the nonlinear effect of the unstable contact region in the hinge assembly, and solving the electromagnetic compatibility problem of the folding screen electronic device caused by the nonlinear effect.

[0013] In one implementation, the first structural member includes a first middle frame; the second structural member includes a second middle frame; the first connecting member includes a hinge assembly; one end of the conductive medium is attached to the first middle frame, and the other end is attached to the second middle frame. In this way, the conductive medium can shunt the coupling current on the hinge assembly, thereby eliminating or weakening the nonlinear effect of the unstable contact area in the hinge assembly, and solving the electromagnetic compatibility problem caused by the nonlinear effect of the folding screen electronic device.

[0014] In one implementation, the hinge assembly includes a hinge body, a first rotating structure, and a second rotating structure; the first rotating structure is located in the hinge body; one end of the first connecting structure is connected to the first middle frame, and the other end is connected to the first rotating structure; the nonlinear region includes: an unstable contact region between at least two devices in the first rotating structure, and / or, an unstable contact region between the first rotating structure and the first connecting structure; the first structural member includes the first middle frame; the second structural member includes the hinge body; the first connecting member includes the first rotating structure and the first connecting structure; one end of the conductive medium is attached to the first middle frame, and the other end of the conductive medium is attached to the hinge body. In this way, the conductive medium can shunt the coupling current on the first rotating structure and the first connecting structure, thereby eliminating or weakening the nonlinear effect of the unstable contact region in the first rotating structure and the first connecting structure, and solving the electromagnetic compatibility problem caused by the nonlinear effect of the folding screen electronic device.

[0015] In one implementation, the hinge assembly includes a hinge body, a door panel, a second connection structure, and a third connection structure; one end of the second connection structure is connected to the first middle frame, and the other end is connected to the door panel; one end of the third connection structure is connected to the door panel, and the other end is connected to the hinge body; the non-linear region includes: an unstable contact region between the second connection structure and the door panel, and / or an unstable contact region between the third connection structure and the door panel; the first structural member includes the first middle frame; the second structural member includes the hinge body; the first connection member includes the door panel, the second connection structure, and the third connection structure; one end of the conductive medium is attached to the first middle frame, and the other end is attached to the hinge body. In this way, the conductive medium can shunt the coupling current on the door panel, the second connection structure, and the third connection structure, thereby eliminating or weakening the non-linear effect of the non-linear contact region in the door panel, the second connection structure, and the third connection structure, and solving the electromagnetic compatibility problem caused by the non-linear effect of the folding screen electronic device.

[0016] In one implementation, the first structural member includes a first middle frame; the second structural member includes a second middle frame; the first connecting member includes a hinge assembly; the conductive medium includes a support plate of the folding screen, and conductive fillers are filled between the support plate and the first middle frame and the second middle frame, and the support plate is electrically connected to the first middle frame and the second middle frame through the conductive fillers. In this way, the support plate, as a conductive medium, can shunt the coupling current on the hinge assembly, thereby eliminating or weakening the nonlinear effect of the unstable contact area in the hinge assembly, and solving the electromagnetic compatibility problem caused by the nonlinear effect of the folding screen electronic device.

[0017] In one implementation, an electromagnetic protection structure is applied to an electronic device including a lifting assembly; the electronic device includes a middle frame, a lifting assembly and a transmission structure; one end of the transmission structure is connected to the middle frame, and the other end is connected to the lifting assembly; the nonlinear region includes: an unstable contact region between at least two devices in the transmission structure, and / or an unstable contact region between the transmission structure and the middle frame, and / or an unstable contact region between the transmission structure and the lifting assembly. The electromagnetic protection structure is applied to an electronic device including a lifting assembly, and can shunt the coupling current on the transmission structure, thereby eliminating or weakening the nonlinear effect of the unstable contact region in the transmission structure, and solving the electromagnetic compatibility problem caused by the nonlinear effect of the electronic device including the lifting assembly.

[0018] In one implementation, the first structural member includes a middle frame; the second structural member includes a lifting assembly;

[0019] The first connecting member includes a transmission structure; one end of the conductive medium is attached to the side of the middle frame close to the RF source, and the other end is attached to the lifting assembly; or one end of the conductive medium is attached to the side of the middle frame close to the RF source, and the other end crosses the lifting assembly and is attached to the side of the middle frame away from the RF source. In this way, the conductive medium can shunt the coupling current on the transmission structure, thereby eliminating or weakening the nonlinear effect of the unstable area in the transmission structure, and solving the electromagnetic compatibility problem caused by the nonlinear effect of the electronic equipment with the lifting assembly.

[0020] In one implementation, the lifting component is a liftable camera module.

[0021] In one implementation, the first middle frame includes a first battery and a first grounding metal, and the first battery is electrically connected to the first grounding metal; the second middle frame includes a second battery and a second grounding metal, and the second battery is electrically connected to the second grounding metal; one end of the conductive medium is attached to the first grounding metal, and the other end is attached to the second grounding metal. In this way, the impedance between the first grounding metal and the second grounding metal is lower, and the charging and discharging of the first battery and the second battery are more balanced.

[0022] In one implementation, the conductive medium includes a sheet-shaped conductive medium.

[0023] In one implementation, the contact area between the sheet-shaped conductive medium and the first structural member and the second structural member is greater than 2 square millimeters. In this way, the contact area between the sheet-shaped conductive medium and the first structural member and the second structural member is large enough to provide lower impedance.

[0024] In one implementation, the width of the sheet-shaped conductive medium is greater than 0.5 mm, and the thickness of the sheet-shaped conductive medium is less than 4 mm, so that the sheet-shaped conductive medium can have a lower impedance.

[0025] In one implementation, the sheet-shaped conductive medium is a sheet-shaped metal.

[0026] In one implementation, the length of the second current path is shorter than the length of the first current path, so that the second current path can have a lower impedance.

[0027] In one implementation, the impedance of the second current path is smaller than the impedance of the first current path.

[0028] In one implementation, the height difference between the conductive medium and the first structural member or the second structural member is less than 5 mm. In this way, the sheet-shaped conductive medium can have a lower impedance.

[0029] In the second aspect, an embodiment of the present application provides an electronic device, which includes a first middle frame, a second middle frame, a hinge assembly, a folding screen and a sheet-like conductive medium; the first middle frame includes a radio frequency source; the first middle frame and the second middle frame are distributed on both sides of the hinge assembly and are respectively connected to the hinge assembly; the folding screen covers the same side of the first middle frame, the second middle frame and the hinge assembly; the first middle frame and the second middle frame are configured to rotate around the hinge assembly to fold or unfold the folding screen; wherein the first middle frame and the second middle frame are coupled with a first current path through the hinge assembly; the conductive medium is electrically connected to the first middle frame and the second middle frame to form a second current path between the first middle frame and the second middle frame, so that at least a part of the coupled current of the radio frequency source flows from the first middle frame to the second middle frame through the second current path.

[0030] In a third aspect, an embodiment of the present application provides an electronic device, which includes a middle frame, a lifting assembly, a transmission structure and a sheet-like conductive medium; the middle frame includes a radio frequency source and a cavity, and the lifting assembly is arranged in the cavity; one end of the transmission structure is connected to the middle frame, and the other end is connected to the lifting assembly, which is used to drive the lifting assembly to descend or ascend, so that the lifting assembly is hidden in the cavity or at least partially protrudes out of the cavity; wherein the middle frame and the lifting assembly are coupled with a first current path through the transmission structure; the conductive medium is electrically connected to the middle frame and the lifting assembly to form a second current path between the middle frame and the lifting assembly, so that at least a part of the coupled current of the radio frequency source flows from the middle frame through the second current path to the lifting assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1A is a schematic diagram of the structure of a folding screen mobile phone shown in an embodiment of the present application;

[0032] Figure 1B This is a scene diagram of the nonlinear effect inside a folding screen mobile phone shown in an embodiment of the present application;

[0033] Figure 2 is another scene diagram of nonlinear effect shown in an embodiment of the present application;

[0034] Figure 3 It is another scene graph of nonlinear effect provided by an embodiment of the present application;

[0035] Figure 4 is a schematic diagram of an electromagnetic protection structure provided by an exemplary embodiment of the present application;

[0036] Figure 5 yes Figure 4 A-direction view of the electromagnetic protection structure provided;

[0037] Figure 6 is a schematic diagram of another electromagnetic protection structure provided by an exemplary embodiment of the present application;

[0038] Figure 7 It is a first application schematic diagram of an electromagnetic protection structure provided by an exemplary embodiment of the present application;

[0039] Figure 8 is a second application schematic diagram of an electromagnetic protection structure provided by an exemplary embodiment of the present application;

[0040] Fig. 9 is a third application schematic diagram of an electromagnetic protection structure provided by an exemplary embodiment of the present application;

[0041] Fig.10 This is an electromagnetic simulation diagram of a folding screen mobile phone provided by an exemplary embodiment of the present application;

[0042] Fig.11 It is a schematic diagram of the shunting effect of a sheet-shaped conductive medium provided by an exemplary embodiment of the present application;

[0043] Fig.12 is a fourth application schematic diagram of an electromagnetic protection structure provided by an exemplary embodiment of the present application;

[0044] Fig.13 is a fifth application schematic diagram of an electromagnetic protection structure provided by an exemplary embodiment of the present application;

[0045] Fig.14 is a sixth application schematic diagram of an electromagnetic protection structure provided by an exemplary embodiment of the present application;

[0046] Fig.15 is the seventh application schematic diagram of the electromagnetic protection structure provided by an exemplary embodiment of the present application;

[0047] Fig.16 is an eighth application schematic diagram of an electromagnetic protection structure provided by an exemplary embodiment of the present application;

[0048] Fig.17 is a ninth application schematic diagram of an electromagnetic protection structure provided by an exemplary embodiment of the present application;

[0049] Fig.18 is the tenth application schematic diagram of the electromagnetic protection structure provided by an exemplary embodiment of the present application;

[0050] Fig.19 is an eleventh application schematic diagram of an electromagnetic protection structure provided by an exemplary embodiment of the present application;

[0051] Fig. 20 This is the twelfth application schematic diagram of the electromagnetic protection structure provided by an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0052] Electronic devices such as mobile phones, tablet computers, and personal computers (PCs) often contain some components with complex structures. For example, a folding screen mobile phone may contain a hinge component to achieve the folding of the body; a mobile phone with a liftable camera module may contain a lift component to achieve the lifting of the camera module.

[0053] In order to realize its function, each component may include one or more devices, for example, the shaft component may include shafts, hinges, door panels, gears, cams, springs, swing arms and / or slide rails, etc.; the lifting component may include motors, screws, sliders, racks, retractable lens barrels, etc. There may be different contact modes between the various components and between the components and other parts of the electronic device, such as stable contact or unstable contact.

[0054] Generally speaking, stable contact means that two devices in contact will not move relative to each other. Common ways to form stable contact include welding, riveting, bonding, screwing, etc. For example, in a folding screen mobile phone, the middle frame and the door panel of the hinge assembly are connected by screws, and the contact formed is stable contact.

[0055] In other words, unstable contact means that two devices in contact can undergo relative displacement. Relative displacement can be any form of displacement such as relative sliding, relative rotation, approaching or moving away from each other between the two devices. Common ways to form unstable contact include connecting two devices by sliding, hinge, abutting, meshing, and rotating. For example: in a folding screen mobile phone, the contact formed by the hinge between the swing arm and the rotating shaft is an unstable contact; the contact formed by the abutment of the paired cams under the elastic force of the spring is also an unstable contact; the contact formed by the meshing of paired gears is also an unstable contact. For another example, in a mobile phone with a liftable camera module, the relative movable contact formed by the lifting component and the screw or rack is also an unstable contact.

[0056] To achieve wireless communication functions, electronic devices may include radio frequency devices such as antennas to transmit or receive electromagnetic wave signals. When the antenna transmits electromagnetic wave signals, coupling currents are generated on the conductive devices around it, and the coupling currents are transmitted between the conductive devices inside the electronic device.

[0057] Generally speaking, two devices that form a stable contact can usually provide a reliable electrical connection. Therefore, when the coupling current flows between the devices in stable contact, generally no nonlinear effect will be generated. On the contrary, two devices that form an unstable contact cannot usually provide a reliable electrical connection. Therefore, when the coupling current flows between the devices in unstable contact, a nonlinear effect will be generated in the contact area of ​​the device. Among them, the nonlinear effect refers to the relationship between the coupling current and the voltage at the connection between the two devices does not follow a simple linear relationship.

[0058] It should be noted that the “electrical connection” in the embodiments of the present application may include direct current conduction formed by direct contact between two devices, or may include high-frequency coupling conduction formed by capacitive coupling of a certain area between two devices.

[0059] Nonlinear effects can cause a series of electromagnetic compatibility problems for electronic devices. The following are some related scenarios with the accompanying figures:

[0060] Figure 1A It is a schematic diagram of the structure of a foldable screen mobile phone shown in an embodiment of the present application.

[0061] Figure 1B This is a scene diagram of the nonlinear effects inside a folding screen mobile phone shown in an embodiment of the present application.

[0062] Scenario 1: Figure 1A and Figure 1BAs shown, a foldable screen mobile phone generally includes a hinge assembly 11, two bodies 12 arranged on both sides of the hinge assembly 11, and a foldable screen 13 covering the two bodies 12 and one side of the hinge assembly 11. Foldable screen mobile phones can include internal foldable screen mobile phones and external foldable screen mobile phones according to the different bending directions of their bodies relative to the foldable screen 13. Among them, the internal foldable screen mobile phone refers to a mobile phone whose body can be folded toward the front of the foldable screen 13, wherein the front of the foldable screen 13 refers to the side of the foldable screen 13 used to display content. When the mobile phone is folded, the foldable screen 13 is hidden inside the body in a folded state. When the mobile phone is unfolded, the foldable screen 13 is flattened to provide a larger display range. The external foldable screen mobile phone refers to a mobile phone whose body 12 can be folded toward the side of the foldable screen 13 that is not facing the front. When the mobile phone is folded, the foldable screen 13 is exposed around the body 12 in a folded state. When the mobile phone is unfolded, the foldable screen 13 is flattened to provide a larger display range.

[0063] In addition, the folding screen mobile phone can also include a horizontal folding screen mobile phone and a vertical folding screen mobile phone according to the different distribution directions of the two fuselages 12. Figure 1A In the inner folding screen mobile phone and the outer folding screen mobile phone shown, the two bodies 12 are distributed on the left and right sides of the hinge assembly 11, that is, the two bodies 12 are folded left and right along the width direction of the mobile phone. Such a folding screen mobile phone can be called a horizontal folding screen mobile phone. Figure 1A As shown, the two bodies 12 of the folding screen mobile phone can also be distributed on the upper and lower sides of the hinge assembly, that is, the two bodies 12 fold up and down along the height direction of the mobile phone. Such a folding screen mobile phone can be called a vertical folding screen mobile phone.

[0064] In a foldable screen mobile phone, the electromagnetic wave signal emitted by the antenna 14 may be coupled to the unstable contact device in the hinge assembly 11. When the coupling current of the antenna 14 passes through the unstable contact device, the unstable contact area between the devices will produce a nonlinear effect. Figure 1A A possible structure of the shaft assembly 11 is also exemplarily shown. Figure 1A As shown, the rotating shaft assembly 11 may include, for example, a shaft cover 111, a rotating shaft 112, a door panel 113, a cam 114, a spring 115, etc. Among them: the rotating shaft 112 is hinged in the shaft cover 111. One side of the door panel 113 is fixedly connected or slidably connected to the rotating shaft 112, and the other side may be fixedly connected or slidably connected to the body 12. The cam 114 abuts against one end of the rotating shaft 112 along the axial direction, and the abutting surface of the cam 114 and the rotating shaft 112 is a cam surface, which is used to provide damping when the body rotates. The spring 115 is connected to the end of the cam 114 that is away from the rotating shaft 112, and is used to apply the pressure required for the cam 114 to abut against the rotating shaft 112.

[0065] In the structure of the above-mentioned rotating shaft assembly 11, there is an unstable contact between the rotating shaft 112 and the cam 114, and there is an unstable contact between the cam 114 and the spring 115. If the door panel 113 and the rotating shaft 112 are connected by sliding, there will be an unstable contact, and if the fuselage 12 and the door panel 113 are connected by sliding, there will also be an unstable contact. Then, when the coupling current of the antenna 14 passes through the unstable contact area between the above-mentioned components, the unstable contact area between the components will produce a nonlinear effect.

[0066] Nonlinear effects can lead to the generation of harmonics, the frequencies of which are usually multiples of the original wave frequencies. The frequencies of some harmonics are the same or close to the frequencies used by electronic equipment for wireless communication, which can cause the radiated spurious emission (RSE) of the entire electronic equipment to exceed the standard. RSE refers to the radiation sensitivity of electronic equipment to electromagnetic fields, which can be used to evaluate the tolerance of electronic equipment to external electromagnetic fields under normal use environments.

[0067] For example, the coupling current generated by the electromagnetic wave signal in the 800MHz frequency band produces a nonlinear effect in the unstable contact area, which can generate 1600MHz harmonics, 2500MHz harmonics, 3200MHz harmonics, etc. The frequency bands of these harmonics are the same or close to the frequency bands of wireless networks such as the global system for mobile communications (GSM), long term evolution (LTE), new radio (NR), Bluetooth, and wireless fidelity (Wi-Fi) used by foldable screen mobile phones. Therefore, they will interfere with wireless communications on these frequency bands, resulting in RSE exceeding the standard and affecting the communication performance of foldable screen mobile phones on these frequency bands.

[0068] Figure 2 This is another scene diagram of nonlinear effect shown in an embodiment of the present application.

[0069] Scenario 2: If Figure 2As shown, some mobile phones include a lifting assembly 21, for example, a liftable camera module. The lifting assembly 21 can be connected to the middle frame 22 of the mobile phone through one or more transmission structures 23, and the transmission structure 23 can connect the lifting assembly 21 to the middle frame 22, and can drive the lifting assembly 21 to lift. In general, the transmission structure 23 may include one or more devices such as a screw 231, a motor 232, and a slider 233. One or more unstable contacts may be formed between the various devices of the transmission structure 23, and at the connection between some devices and the middle frame 22 or the lifting assembly 21, thereby producing a nonlinear effect. For example: the screw 231 can be connected to the output shaft of the motor 232. The slider 233 can be sleeved on the screw 231 and formed with a threaded connection with the screw 231. The lifting assembly 21 can be located on one side of the screw 231 and fixedly connected to the slider 233. When the motor 232 drives the screw 231 to rotate, the slider 233 moves up and down with the rotation of the screw 231, thereby driving the lifting assembly 21 to lift. Among them, the threaded connection between the screw 231 and the slider 233 forms an unstable contact. Therefore, when the coupling current passes through the unstable contact area between the screw 231 and the slider 233, the unstable contact area between the screw 231 and the slider 233 will produce a nonlinear effect, and then generate harmonics, causing the RSE of the mobile phone to exceed the standard, affecting the communication performance of the mobile phone.

[0070] Figure 3 This is another scene diagram of nonlinear effect provided in an embodiment of the present application.

[0071] Scenario 3: If Figure 3 As shown, a folding screen mobile phone generally includes a hinge assembly 31, and two bodies 32 arranged on both sides of the hinge assembly. Among them, a metal area or a common ground line can be provided in each body 32 as the reference ground 33 of the body. In addition, a battery 34 can be placed in each body 32 to achieve a larger battery capacity and improve the battery life of the mobile phone. In this structure, the negative poles of the two batteries 34 are usually coupled to the reference ground 33 of their respective bodies 32. Therefore, in order to avoid the problem of unbalanced charge and discharge of the two batteries 34, it is necessary to make the impedance between the reference grounds 33 of the two bodies 32 as small as possible, so that the potentials of the two reference grounds 33 are close. However, due to the nonlinear contact in the hinge assembly 31, the impedance of the hinge assembly 31 is increased, resulting in a large impedance between the reference grounds 33 of the two bodies 32, which causes the problem of unbalanced charge and discharge of the two batteries 34.

[0072] In the above scenarios, the generation of harmonics due to nonlinear effects, the exceeding of the RSE standard of the entire electronic device, and the unbalanced charging and discharging between the two batteries of the electronic device are all electromagnetic compatibility issues of the electronic device.

[0073] The embodiment of the present application provides an electromagnetic protection structure to solve the electromagnetic compatibility problem caused by nonlinear effects of electronic devices such as mobile phones. The electromagnetic protection structure can be applied to any electronic device that has or may have nonlinear effects, such as: folding screen mobile phones, mobile phones with lifting camera modules, sliding cover mobile phones, flip phones, candy bar mobile phones, tablet computers, personal computers, smart wearable devices, vehicle-mounted devices, site STA devices, wireless access point AP devices, Internet of Things devices, smart home devices, etc.

[0074] Figure 4 It is a schematic diagram of an electromagnetic protection structure 10 provided by an exemplary embodiment of the present application.

[0075] like Figure 4 As shown, in one embodiment, the electromagnetic protection structure 10 may include:

[0076] A first structural member 100 and a second structural member 200, wherein a first current path I1 is coupled between the first structural member 100 and the second structural member 200. The first structural member 100 and the second structural member 200 may be components with conductive capabilities. The first current path I1 may include a nonlinear region, wherein the nonlinear region may include an unstable contact region between at least two devices on the first current path I1, and relative displacement may occur between at least two devices forming the unstable contact region on the first current path I1. When the coupled current of the RF source (e.g., antenna) passes through a nonlinear region, the nonlinear region will produce a nonlinear effect.

[0077] The materials of the first structural member 100 and the second structural member 200 may be the same or different.

[0078] Exemplarily, the material of the first structural member 100 and the second structural member 200 may include metal, for example, aluminum, magnesium, steel, copper, and alloys of various metals.

[0079] Exemplarily, the material of the first structural member 100 and the second structural member 200 may also include non-metal with conductive ability, such as graphite, conductive polymer, conductive ceramic, etc.

[0080] For example, in addition to materials having conductive properties, the first structural member 100 and the second structural member 200 may also be components formed by combining conductive materials and non-conductive materials, such as components formed by injection molding of metal and plastic.

[0081] Of course, the first structural member 100 and the second structural member 200 may also include other conductive materials, which are not specifically limited here.

[0082] In the embodiment of the present application, a first connecting member 400 may be further included between the first structural member 100 and the second structural member 200. The first connecting member 400 may be electrically connected to the first structural member 100 and the second structural member 200, respectively, to form a first current path I1. In this way, the current in the first structural member 100 may flow to the second structural member 200 via the first connecting member 400, and the current in the second structural member 200 may also flow to the first structural member 100 via the first connecting member 400.

[0083] Exemplarily, the first structural member 100 and the second structural member 200 may be disposed on both sides of the first connecting member 400. One end of the first connecting member 400 may be connected to the first structural member 100, and the other end of the first connecting member 400 may be connected to the second structural member 200, so that the first structural member 100 and the second structural member 200 may be connected together through the first connecting member 400 to form a first current path I1.

[0084] In the embodiment of the present application, the first structural member 100 and the first connecting member 400, as well as the second structural member 200 and the first connecting member 400, can be electrically connected by any connection method, such as welding, riveting, bonding, screw connection, hinge, latch connection, elastic connection, embedded connection, lock connection, sliding connection, etc. The specific connection methods used by the first structural member 100 and the first connecting member 400, as well as the second structural member 200 and the first connecting member 400 can be determined based on the specific structures of the first structural member 100, the second structural member 200 and the first connecting member 400, and the actual needs of the product, and the embodiment of the present application does not limit this.

[0085] In the embodiment of the present application, the first connecting member 400 may be any component with connection, transmission or transmission function. The first connecting member 400 may include at least one device, such as: a shaft, a hole, a hinge, a gear, a rack, a cam, a spring, a swing arm, a connecting rod, a slide rail, a guide rail, a threaded member, a pin, a cable, a chain, etc. When the first connecting member 400 includes multiple devices, different connection modes may be formed between the multiple devices, such as: welding, riveting, bonding, screw connection, hinge, pin connection, elastic connection, embedded connection, lock connection, sliding connection, etc.

[0086] In the embodiment of the present application, there may be multiple connection modes between the components in the first connecting member 400 .

[0087] When there are hinged, latched, or sliding connections between the components in the first connector 400, at least two of them will form an unstable contact. In other words, there is an unstable contact area between at least two components in the first connector 400.

[0088] In addition, there may be multiple connection modes between the first structural member 100 and the first connecting member 400. When there are connection modes such as hinge connection, latch connection, sliding connection, etc. between the first structural member 100 and the first connecting member 400, an unstable contact may be formed between the first structural member 100 and the first connecting member 400. In other words, there is an unstable contact area between the first structural member 100 and the first connecting member 400.

[0089] In addition, there may be multiple connection modes between the second structural member 200 and the first connecting member 400. When there are connection modes such as hinge connection, latch connection, sliding connection, etc. between the second structural member 200 and the first connecting member 400, an unstable contact may be formed between the second structural member 200 and the first connecting member 400. In other words, there is an unstable contact area between the second structural member 200 and the first connecting member 400.

[0090] It can be seen that there is a nonlinear region on the first current path I1, and the nonlinear region may, for example, include an unstable contact region between at least two devices in the first connector 400, and / or an unstable contact region between the first structural member 100 and the first connector 400, and / or an unstable contact region between the second structural member 200 and the first connector 400.

[0091] In an embodiment of the present application, the first structural member 100 also includes a radio frequency source 500. The radio frequency source 500 may, for example, include an antenna in the first structural member 100, and may specifically include an antenna branch. The antenna may generally be arranged at the edge of the first structural member 100 to facilitate receiving signals from the outside or sending signals to the outside. Among them, the antenna may be an antenna for one or more mobile network signals such as the Global System for Mobile Communications GSM, Long Term Evolution Technology LTE, and New Radio NR. The antenna may also be an antenna for receiving wireless network signals such as wireless fidelity Wi-Fi and Bluetooth. The antenna may also be an antenna for receiving other network signals such as satellite signals. Antenna branches refer to branches or parts of an antenna composed of a conductor, which are used to change the radiation characteristics of the antenna or to achieve specific functions.

[0092] When the RF source 500 transmits or receives RF signals, a coupling current is generated, and the coupling current may include, for example, a floor current. The floor current may be a current generated between the radiating part of the antenna and the ground. When the antenna transmits or receives electromagnetic waves, the coupling current flows from the first structural member to other components.

[0093] In the embodiment of the present application, the electromagnetic protection structure 10 further includes a conductive medium 300. The conductive medium 300 may be a component with conductive capability. The conductive medium 300 may have low impedance, and when current passes through the conductive medium 300, no nonlinear effect is generated in the conductive medium 300.

[0094] The conductive medium 300 is electrically connected to the first structure member 100 and the second structure member 200 respectively to form a second current path I2 between the first structure member 100 and the second structure member 200. The impedance of the second current path I2 is smaller than the impedance of the first current path I1.

[0095] The second current path I2 can achieve the shunting effect on the first current path I1. That is, if the electromagnetic protection structure 10 does not include the conductive medium 300, the coupling current in the first structural member 100 will flow to the second structural member 200 through the first current path I1. However, due to the presence of the conductive medium 300 and the lower impedance of the second current path I1 formed by the conductive medium 300, at least a part of the coupling current will flow to the second structural member 200 through the second current path I2, thereby achieving the shunting effect of the second current path I2 on the first current path I1.

[0096] It can be understood that due to the shunting effect of the second current path I2 on the first current path I1, the coupling current on the first current path I1 will be reduced, so the nonlinear effect on the first current path I1 can be effectively reduced or even eliminated.

[0097] In the embodiment of the present application, the first structural member 100 and the conductive medium 300, and the second structural member 200 and the conductive medium 300 can be electrically connected by a stable contact connection method. In this way, when the coupling current passes through the second current path I2, the contact area between the first structural member 100 and the conductive medium 300 and the contact area between the second structural member 200 and the conductive medium 300 will not produce nonlinear effects, thereby not generating harmonics. In addition, the impedance of the second current path I2 can be effectively reduced.

[0098] In the embodiment of the present application, the conductive medium 300 can be any conductive medium. The conductive medium 300 can be designed in various structural forms, for example, it can be a sheet conductive medium, a fiber conductive medium, a wire, a conductive adhesive, etc.

[0099] The sheet-like conductive medium may be, for example, sheet metal, conductive foam, conductive mylar, etc. Sheet metal includes but is not limited to copper foil, aluminum foil, gold foil, copper sheet, aluminum sheet, steel sheet, etc. The fibrous conductive medium may be, for example, conductive fiber cloth, conductive fiber cotton, etc. The wire may be, for example, a coaxial line, a multi-core wire, a flat wire, etc. Metal ears may be provided at both ends of the wire to contact the first structural member 100 and the second structural member 200 through the metal ears, thereby increasing the contact area and reducing the contact impedance.

[0100] In the following, the conductive medium 300 is taken as a sheet-shaped conductive medium as an example to further illustrate various implementation methods and application scenarios of the electromagnetic protection structure 10 of the embodiment of the present application.

[0101] Figure 5 yes Figure 4 A view of the electromagnetic protection structure 10 is provided.

[0102] Combined with Figure 4 and Figure 5 As shown, in one implementation, the sheet-like conductive medium 310 may be located in the projection area of ​​the first current path I1. For example, the sheet-like conductive medium 310 may cover the surfaces of the first structural member 100, the second structural member 200 and the first connecting member 400. For example, one end of the sheet-like conductive medium 310 may extend from the surface of the first connecting member 400 to the surface of the first structural member 100, and be attached to the surface of the first structural member 100 by means of conductive adhesive, etc., so as to realize the electrical connection between the sheet-like conductive medium 310 and the first structural member 100. In addition, the other end of the sheet-like conductive medium 310 may extend from the surface of the first connecting member 400 to the surface of the second structural member 200, and be attached to the surface of the second structural member 200 by means of conductive adhesive, etc., so as to realize the electrical connection between the sheet-like conductive medium 310 and the second structural member 200.

[0103] Figure 6 It is a schematic diagram of another electromagnetic protection structure 10 provided by an exemplary embodiment of the present application.

[0104] like Figure 6 As shown, in one implementation, one end of the sheet-like conductive medium 310 is attached to the first structural member 100 to form an electrical connection with the first structural member 100, and the other end is attached to the second structural member 200 to form an electrical connection with the first structural member 100, and the sheet-like conductive medium 310 is closer to the edges of the first structural member 100 and the second structural member 200 than the first connecting member 400, that is, the distance between the sheet-like conductive medium 310 and the edge of the first structural member 100 is smaller than the distance between the first connecting member 400 and the edge of the first structural member 100. With such a structure, the length of the second current path I2 is shorter than that of the first current path I1, and the impedance is also lower, which is conducive to improving the shunting effect of the second current path I2.

[0105] In one implementation, the width of the sheet-shaped conductive medium 310 may be greater than 0.5 mm, preferably greater than 1 mm, and the thickness of the sheet-shaped conductive medium may be less than 4 mm, preferably less than 2 mm. In this way, the sheet-shaped conductive medium 310 may have a lower impedance. The length of the sheet-shaped conductive medium 310 may be selected according to actual needs and is not specifically limited here.

[0106] In one implementation, the contact area between the sheet-shaped conductive medium 310 and the first structural member 100 and the second structural member 200 is greater than 2 square millimeters. In this way, the sheet-shaped conductive medium 310 and the first structural member 100 and the second structural member 200 can have a lower contact impedance.

[0107] It can be seen from the above technical solutions that the electromagnetic protection structure 10 provided in the embodiment of the present application, when there is a nonlinear region in the first current path I1 between the first structural member 100 and the second structural member 200, uses the conductive medium 300 to add a second current path I2 between the first structural member 100 and the second structural member 200. The impedance of the second current path I2 is lower and does not produce nonlinear effects, and can shunt the first current path I1, eliminating or weakening the nonlinear effect on the first current path I1. Therefore, when the electromagnetic protection structure 10 provided in the embodiment of the present application is applied to electronic equipment, it can solve the electromagnetic compatibility problem caused by the nonlinear effect of the electronic equipment.

[0108] In some embodiments, the electromagnetic protection structure 10 can be applied to electronic devices including rotating devices, for example, can be applied to foldable screen mobile phones.

[0109] Figure 7 This is a first application schematic diagram of an electromagnetic protection structure 10 provided by an exemplary embodiment of the present application.

[0110] like Figure 7 As shown, the foldable screen mobile phone may include:

[0111] A rotating shaft assembly 610 , and a first middle frame 620 and a second middle frame 630 respectively arranged on both sides of the rotating shaft assembly 610 .

[0112] The first middle frame 620 , the second middle frame 630 and the hinge assembly 610 are generally conductive metal structures to ensure connection strength.

[0113] Among them, the first middle frame 620 serves as the supporting structure of the folding screen mobile phone, on which various modules in the electronic device can be carried, such as camera modules, batteries, antennas, circuit boards, various sensors, motors, buttons, etc. Similarly, the second middle frame 630 serves as the supporting structure of the folding screen mobile phone, on which various modules in the electronic device can also be carried. Generally speaking, the types and quantities of modules carried by the first middle frame 620 and the second middle frame 630 can be different.

[0114] The function of the rotating shaft assembly 610 is to form a rotation connection with the first middle frame 620 and the second middle frame 630 respectively. To achieve this function, Figure 7As shown, the hinge assembly 610 may include, for example, a hinge body 611, a rotating structure 612, and a connecting structure 613. Among them, the hinge body 611 may include a shaft cover, which is the basic part of the hinge assembly 610. The rotating structure 612 may be arranged on the hinge body 611, and generally may include gears, cam springs and other devices for realizing the rotation function, and there may be unstable contact between these devices. The connecting structure 613 may include devices such as swing arms and connecting rods. One end of the connecting structure 613 may be rotatably connected to the rotating structure 612 to form an unstable contact. The other end of the connecting structure 613 may be fixedly connected to the first middle frame 620 or the second middle frame 630, so that the connecting structure 613 forms a stable contact with the first middle frame 620 or the second middle frame 630. In this way, the first middle frame 620 can rotate around the hinge body 611 to unfold or fold the folding screen mobile phone.

[0115] The hinge body 611 and each middle frame of the folding screen mobile phone can be connected through at least one set of rotating structures 612 and connecting structures 613. For example, a set of rotating structures 612-1 and connecting structures 613-1 cooperate to connect the hinge body 611 to the first middle frame 620. For another example, a set of rotating structures 612-2 and connecting structures 613-2 cooperate to connect the hinge body 611 to the second middle frame 630.

[0116] exist Figure 7 In the folding screen mobile phone shown, there is an unstable contact between the components of the rotating structure 612 and at the connection between the rotating structure 612 and the connecting structure 613. Therefore, there is a nonlinear region in the rotating shaft assembly 610, and the nonlinear region may, for example, include an unstable contact region between at least two components in the rotating structure 612, and / or an unstable contact region between the rotating structure 612 and the connecting structure 613. In other words, the nonlinear region includes an unstable contact region between at least two components in the rotating shaft assembly 610.

[0117] Therefore, when a coupling current flows from the first middle frame 620 to the second middle frame 630 via the hinge assembly 610, or when a coupling current flows from the second middle frame 630 to the first middle frame 620 via the hinge assembly 610, the nonlinear region in the hinge assembly 610 will produce a nonlinear effect, resulting in electromagnetic compatibility problems.

[0118] The coupling current in the first middle frame 620 can be the floor current generated when the antenna of the folding screen mobile phone transmits and receives electromagnetic waves. In a folding screen mobile phone, the antenna is generally set at the outer edge of the whole machine, for example, at the outer edge of the first middle frame 620. Generally speaking, the outer edge of the first middle frame 620 may include one or more antennas. Among them, some antennas, such as the first antenna 621, are close to the hinge assembly 610. Therefore, the coupling current near the first antenna 621 can flow from the first middle frame 620 to the second middle frame 630 through the connecting structure 613-1, the rotating structure 612-1, the hinge body 611, the rotating structure 612-2, and the connecting structure 613-2 in the hinge assembly 610, thereby generating a nonlinear effect in the nonlinear region of the path, resulting in electromagnetic compatibility problems. Among them, the current path formed by the connecting structure 613-1, the rotating structure 612-1, the hinge body 611, the rotating structure 612-2, and the connecting structure 613-2 is used as the first current path I1.

[0119] In order to solve the electromagnetic compatibility problem caused by the nonlinear effect, a sheet-shaped conductive medium 310, such as a sheet-shaped metal, can be used to electrically connect the first middle frame 620 and the second middle frame 630 to shunt the coupling current in the first current path I1.

[0120] In one implementation, one end of the sheet-like conductive medium 310 can be attached to the first middle frame 620, so that the sheet-like conductive medium 310 and the first middle frame 620 are electrically connected and form a stable contact; and the other end of the sheet-like conductive medium 310 can be attached to the second middle frame 630, so that the sheet-like conductive medium 310 and the second middle frame 630 are electrically connected and form a stable contact. In this way, the first middle frame 620 serves as the first structural member 100, the second middle frame 630 serves as the second structural member 200, the connecting structure 613-1, the rotating structure 612-1, the rotating shaft body 611, the rotating structure 612-2, and the connecting structure 613-2 in the rotating shaft assembly 610 serve as the first connecting member 400, and the sheet-like conductive medium 310 can form a second current path I2 between the first middle frame 620 and the second middle frame 630.

[0121] In this implementation, the second current path I2 formed by the sheet-like conductive medium 310 can divert the first current path I1, thereby eliminating or weakening the nonlinear effect of the nonlinear region on the first current path I1. Therefore, this implementation can solve the electromagnetic compatibility problem caused by the nonlinear effect of the folding screen mobile phone.

[0122] Affected by the structural characteristics of the antenna being located at the outer edge of the entire device and the boundary conditions of electromagnetic waves, the antenna's floor current is mainly distributed on the outer edge of the middle frame of the electronic device, while the floor current distribution inside the middle frame is relatively small. Among them, the boundary conditions of electromagnetic waves refer to the conditions that electromagnetic waves propagating between two different media need to meet at the interface, including the continuity of the normal component and the continuity of the normal tangential component. The boundary conditions of electromagnetic waves are common knowledge in this field and will not be elaborated here.

[0123] Further Figure 7 As shown, based on the distribution characteristics of the floor current, in one implementation, the sheet-like conductive medium 310 can be closer to the first antenna 621 than the connection structure 613 and the rotating structure 612, or the sheet-like conductive medium 310 can be closer to the outer edge of the first middle frame 620 than the connection structure 613 and the rotating structure 612. In this way, the second current path I2 can be established in an area where the floor current is more distributed to divert more floor current. In addition, the length of the second current path I2 can be shortened, so that the length of the second current path I2 is shorter than the length of the first current path I1, reducing the impedance of the second current path I2, thereby improving the shunting effect of the second current path I2 on the first current path I1.

[0124] Figure 8 This is a second application schematic diagram of the electromagnetic protection structure 10 provided by an exemplary embodiment of the present application.

[0125] like Figure 8 As shown, in one implementation, the sheet-like conductive medium 310 can cover the surface of at least one device on the first current path I1, for example, the sheet-like conductive medium 310 can cover the surface of at least one device in the connection structure 613-1, the rotation structure 612-1, the shaft body 611, the rotation structure 612-2, and the connection structure 613-2. In this way, in addition to being electrically connected to the first middle frame 620 and the second middle frame 630, the sheet-like conductive medium 310 can also be electrically connected to the devices in the first current path I1, so that when the coupling current passes through the devices in the first current path I1, the sheet-like conductive medium 310 can further divide the coupling current from these devices to improve the shunting effect of the second current path I2 on the first current path I1.

[0126] Fig. 9 This is a third application schematic diagram of the electromagnetic protection structure 10 provided by an exemplary embodiment of the present application.

[0127] like Fig. 9As shown, in one implementation, the sheet-shaped conductive medium 310 may not shunt the entire first current path I1, but only shunt part of the first current path I1. For example, only the section of the first current path I1 from the first middle frame 620 to the shaft body 611 is shunt, or only the section of the first current path I1 from the shaft body 611 to the second middle frame 630 is shunt. In addition, two or more sheet-shaped conductive media 310 may be provided, and the first current path I1 may be shunted in sections by using multiple sheet-shaped conductive media 310.

[0128] Exemplarily, one end of the sheet-like conductive medium 310-1 can be attached to the first middle frame 620, so that the sheet-like conductive medium 310 and the first middle frame 620 are electrically connected and form a stable contact; the other end of the sheet-like conductive medium 310 is attached to the shaft body 611 across the connection structure 613-1 and the rotation structure 612-1, so that the sheet-like conductive medium 310 and the shaft body 611 form a stable contact. In this way, the sheet-like conductive medium 310 can form a second current path I2 between the first middle frame 620 and the shaft body 611 to shunt the section between the first middle frame 620 and the shaft body 611 of the first current path I1. In this example, the first middle frame 620 serves as the first structural member 100, the shaft body 611 serves as the second structural member 200, and the connection structure 613-1 and the rotation structure 612-1 serve as the first connecting member 400.

[0129] Alternatively, one end of the sheet-like conductive medium 310-2 may be attached to the second middle frame 630, so that the sheet-like conductive medium 310 and the second middle frame 630 are electrically connected and in stable contact; the other end of the sheet-like conductive medium 310 is attached to the shaft body 611 across the connection structure 613-2 and the rotation structure 612-2, so that the sheet-like conductive medium 310 and the shaft body 611 are in stable contact. In this way, the sheet-like conductive medium 310 can form a second current path I2 between the second middle frame 630 and the shaft body 611 to shunt the section between the shaft body 611 and the second middle frame 630 of the first current path I1. In this example, the shaft body 611 serves as the first structural member 100, the second middle frame 630 serves as the second structural member 200, and the connection structure 613-2 and the rotation structure 612-2 serve as the first connecting member 400.

[0130] In addition, the sheet-shaped conductive medium 310 - 1 and the sheet-shaped conductive medium 310 - 2 may be used simultaneously to shunt the section between the first middle frame 620 and the shaft body 611 and the section between the shaft body 611 and the second middle frame 630 of the first current path I1 .

[0131] It should be noted that in this implementation, based on Fig. 9The illustrated method of partially shunting or segmented shunting the first current path I1 by using the sheet-like conductive medium 310-1 and / or the sheet-like conductive medium 310-2 is only a partial implementation method, not a full implementation method. In other implementation methods, the two ends of the sheet-like conductive medium 310 can be attached to any two positions on the first current path I1, as long as the sheet-like conductive medium 310 can play a role in partially shunting the first current path I1, it does not exceed the protection scope of the embodiment of the present application.

[0132] Fig.10 This is an electromagnetic simulation diagram of a folding screen mobile phone provided by an exemplary embodiment of the present application.

[0133] like Fig.10 As shown, in some implementations, the attachment position of the sheet-shaped conductive medium 310 can also be determined based on the electromagnetic simulation results of the entire folding screen mobile phone. For example, the distribution characteristics of the coupling current of the first antenna 621 in the folding screen mobile phone can be simulated to obtain the distribution characteristics of the coupling current of the first antenna 621 in the folding screen mobile phone. Fig.10 In the figure, the gain of the bottom plate current (unit: dBA) is reflected in the depth of the color in the figure. The lighter the color, the greater the current gain, and the darker the color, the smaller the current gain. Next, based on the distribution characteristics of the coupling current in the folding screen mobile phone, the coupling path of the coupling current between the first middle frame 620 and the hinge body 611 can be found, that is, the first current path I1. Furthermore, based on the coupling path of the coupling current between the first middle frame 620 and the hinge body 611, the shortest path of the coupling current between the first middle frame 620 and the hinge body 611 can be determined, and a sheet-like conductive medium 310 can be added to the shortest path to form a second current path I2 on the above-mentioned shortest path using the sheet-like conductive medium 310.

[0134] After determining the shortest path of the coupling current between the first middle frame 620 and the shaft body 611 and adding the sheet-like conductive medium 310 to the shortest path, a simulation analysis can be performed on the coupling current gain of a certain problem point in the nonlinear region between the first middle frame 620 and the shaft body 611 to verify the shunting effect of the sheet-like conductive medium 310.

[0135] Fig.11 It is a schematic diagram of the shunting effect of a sheet-like conductive medium provided by an exemplary embodiment of the present application.

[0136] Fig.11In the figure, the x-axis represents the frequency of the electromagnetic wave (unit: GHz), the y-axis represents the current gain (unit: dBA), and curve 1 represents the coupling current gain of the problem point before adding the sheet-like conductive medium 310; curve 2 represents the coupling current gain of the problem point after adding the sheet-like conductive medium 310. It can be seen that after adding the sheet-like conductive medium 310, the coupling current gain of the problem point is reduced by 8 to 9 dBA compared with before adding the sheet-like conductive medium 310. For example, when the electromagnetic wave is around 1.700 GHz, before adding the sheet-like conductive medium 310, the coupling current gain is -30.446 dBA, and after adding the sheet-like conductive medium 310, the coupling current gain is -39.917 dBA. It can be seen that in the embodiment of the present application, the sheet-like conductive medium 310 can have a significant shunting effect on the first current path I1.

[0137] Fig.12 This is the fourth application schematic diagram of the electromagnetic protection structure 10 provided by an exemplary embodiment of the present application.

[0138] like Fig.12 As shown, the hinge assembly 610 of some folding screen mobile phones may have a more complex structure. For example, in addition to the hinge body 611, the hinge assembly 610 also includes a door panel 614 between each middle frame and the hinge body 611, and each door panel 614 can be connected to its adjacent middle frame and hinge body 611 through a connecting structure 613. For example, the door panel 614-1 can be connected to the first middle frame 620 and the hinge body 611 through a connecting structure 613-3 and a connecting structure 613-4, and the door panel 614-2 can be connected to the second middle frame 630 and the hinge body 611 through a connecting structure 613-5 and a connecting structure 613-6. Taking the connection of the door panel 614-1 to the first middle frame 620 and the hinge body 611 through the connecting structure 613 as an example, the connection method of the door panel 614 with the middle frame and the hinge body 611 is exemplarily described:

[0139] Exemplarily, a connection structure 613-3 may be provided between the first middle frame 620 and the door panel 614-1, wherein one end of the connection structure 613-3 may be fixedly connected to the first middle frame 620 to form a stable contact, and the other end of the connection structure 613-3 may be slidably connected to the door panel 614 to form an unstable contact. In addition, a connection structure 613-4 may be provided between the door panel 614 and the shaft body 611, wherein one end of the connection structure 613-4 may be slidably connected to the door panel 614 to form an unstable contact, and the other end of the connection structure 613-4 may be fixedly connected to the shaft body 611 to form a stable contact.

[0140] It should be noted that in the above example, the connection between the door panel 614, the connection structure 613-3, the connection structure 613-4, the first middle frame 620 and the hinge body 611 is only an example. In the specific implementation of the folding screen mobile phone, there may be other connection methods between the components, for example: the connection structure 613-3 can be slidably connected to the first middle frame 620, the connection structure 613-3 can be fixedly connected to the door panel 614, and the connection structure 613-4 can be slidably connected to the hinge body 611. In other words, when the hinge assembly 610 of the folding screen mobile phone includes the door panel 614, the unstable contact may also be located at other positions other than the above example.

[0141] It can be seen that in the structure where the rotating shaft assembly 610 includes the door panel 614, the rotating shaft body 611 and the door panels 614 and the connecting structure 613 on both sides of the rotating shaft body 611 together form a first current path I1 between the first middle frame 620 and the second middle frame 630. In addition, there is a nonlinear region in the first current path I1, and the nonlinear region may include, for example, an unstable contact region between the connecting structure 613-3 and the door panel 614, and / or an unstable contact region between the connecting structure 613-4 and the door panel 614. Further, as shown in FIG. Fig.12 In one implementation, in order to solve the nonlinear problem, one end of the sheet-like conductive medium 310 can be attached to the first middle frame 620, so that the sheet-like conductive medium 310 and the first middle frame 620 are electrically connected and form a stable contact; and the other end of the sheet-like conductive medium 310 can be attached to the second middle frame 630, so that the sheet-like conductive medium 310 and the second middle frame 630 are electrically connected and form a stable contact. In this way, the sheet-like conductive medium 310 can form a second current path I2 between the first middle frame 620 and the second middle frame 630. In this implementation, the first middle frame 620 is used as the first structural member 100, the second middle frame 630 is used as the second structural member 200, and the shaft body 611 in the shaft assembly 610 and the door panels 614 and the connecting structure 613 on both sides of the shaft body 611 are used as the first connecting member 400.

[0142] In this implementation, the second current path I2 formed by the sheet-like conductive medium 310 can divert the first current path I1, thereby eliminating or weakening the nonlinear effect of the nonlinear region on the first current path I1. Therefore, this implementation can solve the electromagnetic compatibility problem caused by the nonlinear effect of the folding screen mobile phone.

[0143] Fig.13 This is the fifth application schematic diagram of the electromagnetic protection structure 10 provided by an exemplary embodiment of the present application.

[0144] like Fig.13As shown, in one implementation, the sheet-shaped conductive medium 310 can be used to partially shunt the first current path I1 .

[0145] Exemplarily, one end of the sheet-like conductive medium 310-3 can be attached to the first middle frame 620, so that the sheet-like conductive medium 310-3 and the first middle frame 620 are electrically connected and form a stable contact; the other end of the sheet-like conductive medium 310-3 is crossed over the connecting structure 613-3 and attached to the door panel 614-1, so that the sheet-like conductive medium 310-3 and the door panel 614-1 form a stable contact. In this way, the sheet-like conductive medium 310 can form a second current path I2 between the first middle frame 620 and the door panel 614-1 to shunt the section between the first middle frame 620 and the door panel 614-1 of the first current path I1. In this example, the first middle frame 620 serves as the first structural member 100, the door panel 614-1 serves as the second structural member 200, and the connecting structure 613-3 serves as the first connecting member 400.

[0146] Alternatively, one end of the sheet-like conductive medium 310-4 can be attached to the door plate 614-1, so that the sheet-like conductive medium 310-4 and the door plate 614-1 are electrically connected and form a stable contact; the other end of the sheet-like conductive medium 310-4 is attached to the shaft body 611 across the connection structure 613-4, so that the sheet-like conductive medium 310-4 and the shaft body 611 form a stable contact. In this way, the sheet-like conductive medium 310-4 can form a second current path I2 between the door plate 614-1 and the shaft body 611 to shunt the section between the door plate 614-1 and the shaft body 611 of the first current path I1. In this example, the door plate 614-1 serves as the first structural member 100, the shaft body 611 serves as the second structural member 200, and the connection structure 613-4 serves as the first connecting member 400.

[0147] In addition, the sheet-shaped conductive medium 310 - 3 and the sheet-shaped conductive medium 310 - 4 may be used simultaneously to shunt the section between the first middle frame 620 and the door plate 614 and the section between the door plate 614 and the shaft body 611 of the first current path I1 .

[0148] It can be understood that the current flow distribution method of the section between the rotating shaft body 611 and the door plate 614-2 and the section between the door plate 614-2 and the second middle frame 630 of the first current path I1 is similar to Fig.13 The above-mentioned diversion method is similar and will not be described again here.

[0149] Fig.14 This is the sixth application schematic diagram of the electromagnetic protection structure 10 provided by an exemplary embodiment of the present application.

[0150] like Fig.14As shown, illustratively, one end of the sheet-like conductive medium 310-5 can also be attached to the first middle frame 620, so that the sheet-like conductive medium 310-5 and the first middle frame 620 are electrically connected and form a stable contact; the other end of the sheet-like conductive medium 310-5 is sequentially crossed over the connection structure 613-3, the door plate 614-1 and the connection structure 613-4, and attached to the shaft body 611, so that the sheet-like conductive medium 310-5 and the shaft body 611 form a stable contact. In this way, the sheet-like conductive medium 310-5 can form a second current path I2 between the first middle frame 620 and the shaft body 611 to shunt the section between the first middle frame 620 and the shaft body 611 of the first current path I1. In this example, the first middle frame 620 serves as the first structural member 100 , the second middle frame 630 serves as the second structural member 200 , and the connecting structure 613 - 3 , the door panel 614 - 1 , and the connecting structure 613 - 4 serve as the first connecting member 400 .

[0151] It can be understood that the current diversion method of the section between the rotating shaft body 611 and the second middle frame 630 of the first current path I1 is similar to Fig.14 The above-mentioned diversion method is similar and will not be described again here.

[0152] It is understandable that the above Fig.13 and Fig.14 The implementation shown is only a part of the implementation of partially shunting the first current path I1 by using the sheet-shaped conductive medium 310, but not all of the implementations. For example, the above implementations can be split or combined to obtain other implementations, or more or fewer sheet-shaped conductive media 310 can be set according to the actual structure of the shaft assembly 610, which does not exceed the protection scope of the embodiments of the present application.

[0153] Fig.13 and Fig.14 In the implementation shown, the second current path I2 formed by the sheet-like conductive medium 310 can partially shunt the first current path I1, thereby eliminating or weakening the nonlinear effect of the nonlinear region on the first current path I1 and solving the electromagnetic compatibility problem caused by the nonlinear effect of the folding screen mobile phone.

[0154] In addition, it should be noted that in a folding screen mobile phone, the folding screen is generally located on one side of the first middle frame 620, the hinge assembly 610 and the second middle frame 630, and the side of the first middle frame 620, the hinge assembly 610 and the second middle frame 630 that is away from the folding screen is generally the shell of the folding screen mobile phone. In the embodiment of the present application, the sheet-like conductive medium 310, such as the sheet-like conductive medium 310, can be located on the side of the first middle frame 620, the hinge assembly 610 and the second middle frame 630 facing the display screen, or on the side of the first middle frame 620, the hinge assembly 610 and the second middle frame 630 that is away from the folding screen. Of course, the sheet-like conductive medium 310 can also be located on both sides of the first middle frame 620, the hinge assembly 610 and the second middle frame 630 at the same time. The embodiment of the present application does not specifically limit this.

[0155] Generally speaking, whether it is an internal folding screen mobile phone or an external folding screen mobile phone, the folding screen needs to have good strength and stability to ensure that the folding screen will not be deformed or damaged in different states. To achieve this goal, the folding screen usually includes a supporting structure, such as a support plate. The support plate is generally made of a metal material with good strength and bending performance, such as stainless steel. The support plate generally fits the back of the display panel of the folding screen, facing the first middle frame 620, the hinge assembly 610 and the second middle frame 630.

[0156] Since the support plate is generally made of metal material and has conductivity, the support plate can be used as the conductive medium 300. That is, the support plate can be electrically connected to the first middle frame 620 and the second middle frame 630, and the conductivity of the support plate is used to provide a second current path I2 to shunt the first current path I1.

[0157] Fig.15 This is the seventh application schematic diagram of the electromagnetic protection structure 10 provided by an exemplary embodiment of the present application.

[0158] The following is based on Fig.15 Taking an inward folding screen mobile phone as an example, the solution of using the conductivity of the support plate to provide a second current path I2 is exemplified.

[0159] like Fig.15As shown, a conductive filler 820-1 can be filled in the gap between the first middle frame 620 and the support plate 810. One end of the conductive filler 820-1 is electrically connected to the first middle frame 620, and the other end is electrically connected to the support plate 810, so as to realize the electrical connection between the first middle frame 620 and the support plate 810, so that the coupling current can flow from the first middle frame 620 to the support plate 810. In addition, a conductive filler 820-2 can also be filled in the gap between the second middle frame 630 and the support plate 810. One end of the conductive filler 820-2 is electrically connected to the second middle frame 630, and the other end is electrically connected to the support plate 810, so as to realize the electrical connection between the second middle frame 630 and the support plate 810, so that the coupling current can flow from the support plate 810 to the second middle frame 630. In this way, the conductive filler 820-1, the support plate 810, and the conductive filler 820-2 constitute a second current path I2 between the first middle frame 620 and the second middle frame 630, so that the coupling current in the first middle frame 620 can flow to the second middle frame 630 through the conductive filler 820-1, the support plate 810, and the conductive filler 820-2, thereby diverting the first current path I1, eliminating or weakening the nonlinear effect of the nonlinear area on the first current path I1, thereby solving the electromagnetic compatibility problem caused by the nonlinear effect of the folding screen mobile phone.

[0160] Exemplarily, the conductive filler 820-1 and the conductive filler 820-2 may be conductive foams. One end of a conductive foam may be bonded to the first middle frame 620 and the other end may be bonded to the support plate 810, thereby achieving electrical connection between the first middle frame 620 and the support plate 810; and another conductive foam may be bonded to the second middle frame 630 at one end and the other end may be bonded to the support plate 810, thereby achieving electrical connection between the second middle frame 630 and the support plate 810.

[0161] In addition, the conductive filler 820 - 1 and the conductive filler 820 - 2 may also be made of other materials or structures having conductive capabilities, such as conductive springs, etc., which will not be described in detail here.

[0162] Fig.16 This is the eighth application schematic diagram of the electromagnetic protection structure 10 provided by an exemplary embodiment of the present application.

[0163] like Fig.16 As shown, compared with traditional mobile phones, folding screen mobile phones usually contain two or more batteries, which are distributed on both sides of the hinge assembly 610 and electrically connected to the reference ground on the side where they are located. The reference ground is the reference ground point of various circuits in the mobile phone, which is used to ensure the stability of the operation of various circuits and provide a stable ground reference for various electrical signals in the mobile phone. Generally speaking, the battery, middle frame, and various functional modules in the circuit of the mobile phone are coupled to the reference ground.

[0164] For example, Fig.16The folding screen mobile phone shown includes two batteries, which are referred to as the first battery 622 and the second battery 632 for ease of description. The first battery 622 is located on one side of the hinge assembly 610 and is disposed on the first middle frame 620. The negative electrode of the first battery 622 can be coupled to the first reference ground on the first middle frame 620. The second battery 632 is located on the other side of the hinge assembly 610 and is disposed on the second middle frame 630. The negative electrode of the second battery 632 can be coupled to the second reference ground on the second middle frame 630.

[0165] Exemplarily, the first reference ground may be, for example, a first grounding metal 623 or a dedicated ground line disposed on a circuit board of the first middle frame 620, so that the negative electrode of the first battery 622 may be electrically connected to the first grounding metal 623 to achieve grounding. The second reference ground may be, for example, a second grounding metal 633 or a dedicated ground line disposed on a circuit board of the second middle frame 630, so that the negative electrode of the second battery 632 may be electrically connected to the second grounding metal 633 to achieve grounding.

[0166] Since there is nonlinear contact in the rotating shaft assembly 610, the impedance of the rotating shaft assembly 610 is very large, which in turn causes the impedance between the first grounding metal 623 and the second grounding metal 633 to be very large. In this case, there will be a large potential difference between the first grounding metal 623 and the second grounding metal 633, resulting in an imbalance in the charge and discharge of the first battery 622 and the second battery 632. For example, if the potential of the first grounding metal 623 is lower than the potential of the second grounding metal 633, then, in the discharge stage, the first battery 622 discharges faster and discharges more fully, and the second battery 632 discharges slower and may not be fully discharged, and vice versa. In addition, if the potential of the first grounding metal 623 is lower than the potential of the second grounding metal 633, in the charging stage, the first battery 622 charges faster and charges more fully, and the second battery 632 charges slower and may not be fully charged, and vice versa.

[0167] like Fig.16 As shown, in some embodiments, the sheet-shaped conductive medium 310 can be used to electrically connect the first grounding metal 623 and the second grounding metal 633. In this way, the sheet-shaped conductive medium 310 can form a second current path I2 between the first grounding metal 623 and the second grounding metal 633. The impedance of the second current path I2 is lower, which can reduce the impedance between the first grounding metal 623 and the second grounding metal 633, and solve the problem of unbalanced charge and discharge of the first battery 622 and the second battery 632. In this embodiment, the first middle frame 620 including the first grounding metal 623 is used as the first structural member 100, the second middle frame 630 including the second grounding metal 633 is used as the second structural member 200, and the shaft assembly 610 is used as the first connecting member 400.

[0168] For example, one end of the sheet-like conductive medium 310 can be attached to the surface of the first grounding metal 623 through a thermally conductive adhesive to form a stable contact. The other end of the sheet-like conductive medium 310 can cross the shaft assembly 610 and be attached to the surface of the second grounding metal 633 through a thermally conductive adhesive to form a stable contact. In this way, the sheet-like conductive medium 310 can form a second current path I2 between the first grounding metal 623 and the second grounding metal 633.

[0169] In one implementation, the contact area between the sheet-like conductive medium 310 and the grounding metal can be increased to provide a lower impedance. For example, the contact area between the sheet-like conductive medium 310 and the first grounding metal 623 can be greater than 2 square millimeters, preferably greater than 4 square millimeters, so as to ensure that the impedance between the sheet-like conductive medium 310 and the first grounding metal 623 is sufficiently small. In addition, the contact area between the sheet-like conductive medium 310 and the second grounding metal 633 can also be greater than 2 square millimeters, preferably greater than 4 square millimeters, so as to ensure that the impedance between the sheet-like conductive medium 310 and the second grounding metal 633 is sufficiently small. In this way, the second circuit path can have a lower impedance, so that the impedance between the first grounding metal and the second grounding metal is lower, thereby making the charging and discharging of the first battery 622 and the second battery 632 more balanced.

[0170] In addition, for the implementation method of attaching the sheet-like conductive medium 310 to the grounding metal, the height between the sheet-like conductive medium 310 and the middle frame can be reduced to reduce the impedance between the middle frame and the sheet-like conductive medium 310. For example, the height difference between the sheet-like conductive medium 310 and the first middle frame 620 can be less than 5 mm, thereby ensuring that the impedance between the sheet-like conductive medium 310 and the first middle frame 620 is sufficiently small. In addition, the height difference between the sheet-like conductive medium 310 and the second middle frame 630 can also be less than 5 mm, thereby ensuring that the impedance between the sheet-like conductive medium 310 and the second middle frame 630 is sufficiently small. In this way, while reducing the impedance between the first grounding metal and the second grounding metal, it is ensured that the second current path I2 can play a good shunting role for the first current path I1.

[0171] The electromagnetic protection structure 10 provided in the embodiment of the present application can also be applied to other scenarios, for example, it can be applied to a mobile phone including a lifting component, wherein the lifting component can be, for example, a liftable camera module.

[0172] Fig.17 This is the ninth application schematic diagram of the electromagnetic protection structure 10 provided by an exemplary embodiment of the present application.

[0173] like Fig.17As shown, in a mobile phone including a lifting assembly 710, the middle frame 600 may have a hollowed-out portion connected to its outer edge to form a cavity 640 inside the mobile phone that is connected to the outside world. The lifting assembly 710 may be located in the cavity 640. Among them, the lifting assembly 710 and the middle frame 600 of the mobile phone may be connected through one or more transmission structures 720. On the one hand, the transmission structure 720 has a connecting function, which can connect the lifting assembly 710 to the middle frame 600 to prevent the lifting assembly 710 from shaking in the cavity 640. On the other hand, the transmission structure 720 also has a transmission function, which can drive the lifting assembly 710 to rise or fall relative to the middle frame 600, so that the lifting assembly 710 partially rises to the outside of the cavity 640, or is hidden in the cavity 640.

[0174] like Fig.17 As shown, the mobile phone including the lifting assembly 710 may include a transmission structure 720-1. The transmission structure 720-1 may be a device or a combination of multiple devices with connection and transmission capabilities, such as a screw, a motor, a slide rail, a slider, a gear, a rack, etc., which is not specifically limited here.

[0175] Due to the presence of the lifting assembly 710, the middle frame 600 may include a side close to the first antenna 621 and a side away from the first antenna 621 relative to the lifting assembly 710. Among them, one end of the transmission structure 720-1 is connected to the side of the middle frame 600 close to the antenna, and the other end of the transmission structure 720-1 is connected to the lifting assembly 710 and away from the first antenna 621 of the mobile phone. Therefore, the coupling current of the first antenna 621 will flow from the side of the middle frame 600 close to the first antenna 621 through the transmission structure 720-1 to the lifting assembly 710. It can be understood that there may be unstable contact inside the transmission structure 720-1 and at the connection between the transmission structure 720-1 and the middle frame 600 or the lifting assembly 710.

[0176] It can be seen that in Fig.17 In the structure shown, the transmission structure 720-1 forms a first current path I1 between the middle frame 600 and the lifting assembly 710, and there is a nonlinear region in the first current path I1, which may include, for example, an unstable contact region inside the transmission structure 720-1, and / or an unstable contact region between the transmission structure 720-1 and the middle frame 600, and / or an unstable contact region between the transmission structure 720-1 and the lifting assembly 710.

[0177] In order to solve the electromagnetic compatibility problem caused by the nonlinear effect, a sheet-shaped conductive medium 310 - 6 , such as a sheet of metal, can be used to electrically connect the middle frame 600 and the lifting assembly 710 to shunt the coupling current in the first current path I1 .

[0178] like Fig.17As shown, in one implementation, one end of the sheet-like conductive medium 310-6 can be attached to the side of the middle frame 600 close to the first antenna 621, so that the sheet-like conductive medium 310-6 and the middle frame 600 are electrically connected and in stable contact; and the other end of the sheet-like conductive medium 310-6 is attached to the lifting assembly 710, so that the sheet-like conductive medium 310-6 and the lifting assembly 710 are electrically connected and in stable contact. In this way, the middle frame 600 serves as the first structural member 100, the lifting assembly 710 serves as the second structural member 200, the transmission structure 720-1 serves as the first connecting member 400, and the sheet-like conductive medium 310-6 can form a second current path I2 between the middle frame 600 and the lifting assembly 710.

[0179] In this implementation, the second current path I2 formed by the sheet-like conductive medium 310-6 can divert the first current path I1, thereby eliminating or weakening the nonlinear effect of the nonlinear region on the first current path I1. Therefore, this implementation can solve the electromagnetic compatibility problem caused by the nonlinear effect of the mobile phone including the lifting component 710.

[0180] Further Fig.17 As shown, in one implementation, the sheet-like conductive medium 310-6 can be located in the projection area of ​​the transmission structure 720-1, covering the surface of the transmission structure 720-1. On this basis, one end of the sheet-like conductive medium 310-6 can extend to the side of the middle frame 600 close to the first antenna 621, and be attached to the middle frame 600 using conductive glue. The other end of the sheet-like conductive medium 310-6 can extend to the surface of the lifting assembly 710, and be attached to the lifting assembly 710 using conductive glue. In this way, in addition to forming an electrical connection with the middle frame 600 and the lifting assembly 710, the sheet-like conductive medium 310-6 can also form an electrical connection with the transmission structure 720-1, so that when the coupling current flows through the transmission structure 720-1, the sheet-like conductive medium 310-6 can further divide part of the coupling current from the transmission structure 720-1 to improve the shunting effect of the second current path I2 on the first current path I1.

[0181] Fig.18 This is the tenth application schematic diagram of the electromagnetic protection structure 10 provided by an exemplary embodiment of the present application.

[0182] like Fig.18As shown, in one implementation, the sheet-like conductive medium 310-6 can be closer to the outer edge of the middle frame 600 than the transmission structure 720-1, and one end of the sheet-like conductive medium 310-6 is in contact with the side of the middle frame 600 close to the first antenna 621, and the other end is in contact with the lifting assembly 710. In this way, the second current path I2 can be established in the area where the coupling current of the first antenna 621 is more distributed, so as to shunt away more coupling current. In addition, the length of the second current path I2 can be shortened, so that the length of the second current path I2 is shorter than the length of the first current path I1, and the impedance of the second current path I2 is reduced, thereby improving the shunting effect of the second current path I2 on the first current path I1.

[0183] Fig.19 This is the eleventh application schematic diagram of the electromagnetic protection structure 10 provided by an exemplary embodiment of the present application.

[0184] like Fig.19 As shown, the mobile phone including the lifting assembly 710 may also include a transmission structure 720-2. The transmission structure 720-2 may be a device or a combination of multiple devices with connection and transmission capabilities, such as a screw, a motor, a slide rail, a slider, a gear, a rack, etc., which is not specifically limited here.

[0185] One end of the transmission structure 720-2 is connected to the lifting assembly 710 and is close to the first antenna 621 of the mobile phone. The other end of the transmission structure 720-2 is connected to the middle frame 600 and is far away from the first antenna 621 of the mobile phone. Compared with the transmission structure 720-1, the transmission structure 720-2 is farther away from the first antenna 621 as a whole. Therefore, the coupling current in the lifting assembly 710 will flow to the middle frame 600 through the transmission structure 720-2. In other words, the transmission structure 720-2 forms the first current path I1 between the lifting assembly 710 and the middle frame 600. When the coupling current passes through the transmission structure 720-2, a nonlinear effect will also be generated, leading to electromagnetic compatibility problems.

[0186] In one implementation, in order to solve the electromagnetic compatibility problem caused by nonlinear effects, Fig.17 or Fig.18On the basis of the structure shown, a sheet-like conductive medium 310-7 is added. Among them, one end of the sheet-like conductive medium 310-7 is attached to the lifting assembly 710, and is electrically connected to the lifting assembly 710, and forms a stable contact. The other end of the sheet-like conductive medium 310-7 is attached to the side of the middle frame 600 away from the first antenna 621, and is electrically connected to the side of the middle frame 600 away from the first antenna 621, and forms a stable contact. In this way, the lifting assembly 710 serves as the first structural member 100, the side of the middle frame 600 away from the first antenna 621 serves as the second structural member 200, the transmission structure 720-2 serves as the first connecting member 400, and the sheet-like conductive medium 310-7 can form a second current path I2 between the lifting assembly 710 and the side of the middle frame 600 away from the first antenna 621.

[0187] In this implementation, the second current path I2 formed by the sheet-like conductive medium 310 can divert the first current path I1, thereby eliminating or weakening the nonlinear effect of the nonlinear region on the first current path I1. Therefore, this implementation can solve the electromagnetic compatibility problem caused by the nonlinear effect of the mobile phone including the lifting component 710.

[0188] It should be noted here that Figure 17-Figure 19 In the illustrated electromagnetic protection structure 10, the sheet-like conductive medium 310 may adopt a structure with tensile properties, such as a metal spring with an S-shaped reciprocating structure, etc. In this way, during the lifting process of the lifting assembly 710, the sheet-like conductive medium 310 may be adaptively stretched or restored as the lifting assembly 710 is lifted, so as to ensure that it can maintain stable contact with the middle frame 600 and the lifting assembly 710.

[0189] Fig. 20 This is the twelfth application schematic diagram of the electromagnetic protection structure 10 provided by an exemplary embodiment of the present application.

[0190] like Fig. 20As shown, in one implementation, one end of the sheet-like conductive medium 310 can be attached to the side of the middle frame 600 close to the first antenna 621, so that the sheet-like conductive medium 310 and the side of the middle frame 600 close to the first antenna 621 form an electrical connection and form a stable contact; and the other end of the sheet-like conductive medium 310 is attached to the side of the middle frame 600 away from the first antenna 621, so that the sheet-like conductive medium 310 and the side of the middle frame 600 away from the first antenna 621 form an electrical connection and form a stable contact. In this way, the side of the middle frame 600 close to the first antenna 621 serves as the first structural member 100, the side of the middle frame 600 away from the first antenna 621 serves as the second structural member 200, the transmission structure 720-1, the lifting assembly 710, and the transmission structure 720-2 serve as the first connecting member 400, and the sheet-like conductive medium 310 can form a second current path I2 between the middle frame 600 on both sides of the lifting assembly 710.

[0191] In this implementation, the second current path I2 formed by the sheet-like conductive medium 310 can divert the first current path I1, thereby eliminating or weakening the nonlinear effect of the nonlinear region on the first current path I1. Therefore, this implementation can solve the electromagnetic compatibility problem caused by the nonlinear effect of the mobile phone including the lifting component 710.

[0192] The embodiment of the present application also provides an electronic device, which may be, for example, a folding screen mobile phone, a mobile phone with a lifting camera module, or any electronic device that has or may have nonlinear effects. The electronic device may include the electromagnetic protection structure 10 provided in the above embodiments of the present application and its implementation methods to solve the electromagnetic compatibility problem caused by the nonlinear effect of the electronic device.

[0193] Exemplarily, the electronic device includes a first middle frame, a second middle frame, a hinge assembly, a folding screen and a sheet-like conductive medium; the first middle frame includes a radio frequency source; the first middle frame and the second middle frame are distributed on both sides of the hinge assembly and are respectively connected to the hinge assembly; the folding screen covers the same side of the first middle frame, the second middle frame and the hinge assembly; the first middle frame and the second middle frame are configured to rotate around the hinge assembly to fold or unfold the folding screen; wherein the first middle frame and the second middle frame are coupled with a first current path through the hinge assembly; the conductive medium is electrically connected to the first middle frame and the second middle frame to form a second current path between the first middle frame and the second middle frame, so that at least a part of the coupled current of the radio frequency source flows from the first middle frame to the second middle frame via the second current path.

[0194] Illustratively, an embodiment of the present application provides an electronic device, which includes a middle frame, a lifting assembly, a transmission structure and a sheet-like conductive medium; the middle frame includes a radio frequency source and a cavity, and the lifting assembly is arranged in the cavity; one end of the transmission structure is connected to the middle frame, and the other end is connected to the lifting assembly, which is used to drive the lifting assembly to descend or ascend, so that the lifting assembly is hidden in the cavity or at least partially protrudes out of the cavity; wherein the middle frame and the lifting assembly are coupled with a first current path through the transmission structure; the conductive medium is electrically connected to the middle frame and the lifting assembly to form a second current path between the middle frame and the lifting assembly, so that at least a part of the coupled current of the radio frequency source flows from the middle frame through the second current path to the lifting assembly.

[0195] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application to obtain other embodiments based on the several embodiments provided in the present application, and these embodiments do not exceed the protection scope of the present application.

[0196] The above specific implementation methods further illustrate the purpose, technical solutions and beneficial effects of the present application in detail. It should be understood that the above are only specific implementation methods of the present application and are not used to limit the protection scope of the present application. Any modifications, equivalent substitutions, improvements, etc. made on the basis of the technical solutions of the present application should be included in the protection scope of the present application.

Claims

1. An electromagnetic protection structure, characterized in that: include: A first structural member, wherein the first structural member comprises a radio frequency source; A second structural member, wherein a first current path is coupled between the second structural member and the first structural member, the first current path includes a nonlinear region, wherein when the coupling current of the RF source passes through the nonlinear region, the nonlinear region generates a nonlinear effect; A conductive medium is electrically connected to the first structural member and the second structural member to form a second current path between the second structural member and the first structural member, so that at least a portion of the coupled current of the RF source flows from the first structural member to the second structural member via the second current path.

2. The electromagnetic protection structure according to claim 1, characterized in that: The nonlinear region includes an unstable contact region between at least two devices on the first current path, wherein relative displacement can occur between the at least two devices forming the unstable contact region.

3. The electromagnetic protection structure according to claim 2, characterized in that: Also included: a first connecting member; The first connecting member is electrically connected to the first structural member and the second structural member to form the first current path; The nonlinear region includes: an unstable contact region between at least two components in the first connector, and / or an unstable contact region between the first connector and the first structural member, and / or an unstable contact region between the first connector and the second structural member.

4. The electromagnetic protection structure according to claim 3, characterized in that: The conductive medium covers surfaces of the first structural member, the second structural member and the first connecting member.

5. The electromagnetic protection structure according to claim 3, characterized in that: The distance between the conductive medium and the edge of the first structural member is smaller than the distance between the first connecting member and the edge of the first structural member.

6. The electromagnetic protection structure according to any one of claims 3 to 5, characterized in that: The electromagnetic protection structure is applied to foldable screen electronic devices; The folding screen electronic device comprises a first middle frame, a second middle frame and a hinge assembly; The first middle frame and the second middle frame are distributed on both sides of the rotating shaft assembly; The first middle frame and the second middle frame are respectively connected to the rotating shaft assembly; The nonlinear region includes: an unstable contact region between at least two components in the shaft assembly.

7. The electromagnetic protection structure according to claim 6, characterized in that: The first structural member includes the first middle frame; The second structural member includes the second middle frame; The first connecting member includes the rotating shaft assembly; One end of the conductive medium is attached to the first middle frame, and the other end of the conductive medium is attached to the second middle frame.

8. The electromagnetic protection structure according to claim 6, characterized in that: The rotating shaft assembly includes a rotating shaft body, a first rotating structure and a second rotating structure; The first rotating structure is located in the rotating shaft body; One end of the first connecting structure is connected to the first middle frame, and the other end is connected to the first rotating structure; The nonlinear region includes: an unstable contact region between at least two components in the first rotating structure, and / or an unstable contact region between the first rotating structure and the first connecting structure; The first structural member includes the first middle frame; The second structural member includes the rotating shaft body; The first connecting member includes the first rotating structure and the first connecting structure; One end of the conductive medium is in contact with the first middle frame, and the other end of the conductive medium is in contact with the shaft body.

9. The electromagnetic protection structure according to claim 6, characterized in that: The rotating shaft assembly includes a rotating shaft body, a door panel, a second connecting structure and a third connecting structure; One end of the second connecting structure is connected to the first middle frame, and the other end is connected to the door panel; One end of the third connecting structure is connected to the door panel, and the other end is connected to the rotating shaft body; The nonlinear region includes: an unstable contact region between the second connecting structure and the door panel, and / or an unstable contact region between the third connecting structure and the door panel; The first structural member includes the first middle frame; The second structural member includes the rotating shaft body; The first connecting member includes the door panel, the second connecting structure and the third connecting structure; One end of the conductive medium is in contact with the first middle frame, and the other end is in contact with the shaft body.

10. The electromagnetic protection structure according to claim 6, characterized in that: The first structural member includes the first middle frame; The second structural member includes the second middle frame; The first connecting member includes the rotating shaft assembly; The conductive medium includes a support plate of the folding screen, conductive fillers are filled between the support plate and the first middle frame and the second middle frame, and the support plate is electrically connected to the first middle frame and the second middle frame respectively through the conductive fillers.

11. The electromagnetic protection structure according to any one of claims 3 to 5, characterized in that: The electromagnetic protection structure is applied to electronic equipment including a lifting assembly; The electronic device comprises a middle frame, a lifting assembly and a transmission structure; One end of the transmission structure is connected to the middle frame, and the other end is connected to the lifting assembly; The nonlinear region includes: an unstable contact region between at least two components in the transmission structure, and / or an unstable contact region between the transmission structure and the middle frame, and / or an unstable contact region between the transmission structure and the lifting assembly.

12. The electromagnetic protection structure according to claim 11, characterized in that: The first structural member includes the middle frame; The second structural member includes the lifting assembly; The first connecting member includes the transmission structure; One end of the conductive medium is in contact with a side of the middle frame close to the RF source, and the other end is in contact with the lifting assembly; Alternatively, one end of the conductive medium is in contact with a side of the middle frame close to the RF source, and the other end thereof crosses the lifting assembly and is in contact with a side of the middle frame away from the RF source.

13. The electromagnetic protection structure according to claim 11 or 12, characterized in that: The lifting component is a liftable camera module.

14. The electromagnetic protection structure according to claim 6, characterized in that: The first middle frame includes a first battery and a first grounding metal, and the first battery is electrically connected to the first grounding metal; The second middle frame includes a second battery and a second grounding metal, and the second battery is electrically connected to the second grounding metal; One end of the conductive medium is in contact with the first grounding metal, and the other end of the conductive medium is in contact with the second grounding metal.

15. The electromagnetic protection structure according to any one of claims 1 to 14, characterized in that: The conductive medium includes a sheet-shaped conductive medium.

16. The electromagnetic protection structure according to claim 15, characterized in that: The contact areas between the sheet-shaped conductive medium and the first structural member and the second structural member are both greater than 2 square millimeters.

17. The electromagnetic protection structure according to claim 15, characterized in that: The width of the sheet-shaped conductive medium is greater than 0.5 mm, and the thickness of the sheet-shaped conductive medium is less than 4 mm.

18. The electromagnetic protection structure according to claim 15, characterized in that: The sheet-shaped conductive medium is a sheet-shaped metal.

19. The electromagnetic protection structure according to any one of claims 1 to 18, characterized in that: The length of the second current path is shorter than the length of the first current path.

20. The electromagnetic protection structure according to any one of claims 1 to 18, characterized in that: An impedance of the second current path is smaller than an impedance of the first current path.

21. The electromagnetic protection structure according to any one of claims 1 to 18, characterized in that: The height difference between the conductive medium and the first structural member or the second structural member is less than 5 mm.

22. An electronic device, characterized in that: include: A first middle frame, a second middle frame, a hinge assembly, a folding screen and a conductive medium; The first middle frame includes a radio frequency source; The first middle frame and the second middle frame are distributed on both sides of the rotating shaft assembly and are respectively connected to the rotating shaft assembly; The folding screen covers the same side of the first middle frame, the second middle frame and the hinge assembly; The first middle frame and the second middle frame are configured to rotate around the rotating shaft assembly to fold or unfold the folding screen; Wherein, the first middle frame and the second middle frame are coupled with a first current path through the rotating shaft assembly; The conductive medium is electrically connected to the first middle frame and the second middle frame to form a second current path between the first middle frame and the second middle frame, so that at least a portion of the coupled current of the RF source flows from the first middle frame to the second middle frame via the second current path.

23. An electronic device, characterized in that: include: Middle frame, lifting assembly, transmission structure and conductive medium; The middle frame includes a radio frequency source and a cavity, and the lifting assembly is arranged in the cavity; One end of the transmission structure is connected to the middle frame, and the other end is connected to the lifting assembly, and is used to drive the lifting assembly to descend or ascend, so that the lifting assembly is hidden in the cavity or at least partially protrudes out of the cavity; Wherein, the middle frame and the lifting assembly are coupled with a first current path through the transmission structure; The conductive medium is electrically connected to the middle frame and the lifting assembly to form a second current path between the middle frame and the lifting assembly, so that at least a portion of the coupled current of the RF source flows from the middle frame to the lifting assembly via the second current path.

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