electronic devices

Abstract

This application provides an electronic device, including: a first body, the first body including a first sidewall; a second body slidably connected to the first body, the second body including a back plate, the first sidewall being opposite to the first body; a pivot disposed on the first body or the second body; a screen assembly, one end connected to the first body and the other end connected to the second body, and the screen assembly being wound around the pivot; wherein, when the electronic device is in an unfolded state, the screen assembly, the first sidewall, and the back plate form a cavity antenna.

Description

Technical Field

[0001] This application belongs to the field of electronic equipment technology, and specifically relates to an electronic device. Background Technology

[0002] In related technologies, the antenna of rollable screen electronic devices is wrapped by the screen, which affects the radiation efficiency of the antenna. Furthermore, when the electronic device is switched between unfolded and folded states, the structure of the electronic device changes, which will affect the radiation effect of the antenna to some extent. Summary of the Invention

[0003] This application aims to provide an electronic device that solves or improves one of the technical problems of poor antenna radiation performance in rollable screen electronic devices.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows:

[0005] In a first aspect, this application provides an electronic device, comprising:

[0006] The first main body includes the first sidewall;

[0007] The second body is slidably connected to the first body, and the second body includes a back plate and a first side wall corresponding to the first body;

[0008] The pivot is located in the second main body;

[0009] The screen assembly is connected to the first main body at one end and to the second main body at the other end, and the screen assembly is wound around the pivot.

[0010] In the unfolded state of the electronic device, the screen assembly, the first sidewall, and the back panel form a cavity antenna.

[0011] In embodiments of this application, the electronic device includes a first body, a second body, a hinge, and a screen assembly. The first body and the second body are capable of moving closer to each other, and when the first body and the second body move closer to each other to a first predetermined state, the electronic device is in a closed state. The first body and the second body are also capable of moving away from each other, and when the first body and the second body move away from each other to a second predetermined state, the electronic device is in an unfolded state. One end of the screen assembly is connected to the first body, and the other end of the screen assembly is connected to the second body and is wound around the hinge disposed on the second body. As the first body and the second body move, the screen assembly is pulled out or retracted into the interior of the first body and the second body through the hinge, thereby realizing a rollable screen type electronic device.

[0012] In this configuration, the first sidewall of the first main body faces the second main body. Thus, when the electronic device is in the unfolded state, the screen assembly, the first sidewall of the first main body, and the backplate of the second main body form a cavity antenna. This excites the transverse electric mode (TE mode) and transverse magnetic mode (TM mode) within the cavity, causing the antenna energy to radiate outward from both sides of the cavity. In other words, the antenna energy radiates outward through the top and bottom of the electronic device, thereby increasing the radiation frequency band of the electronic device's antenna and improving the antenna performance of the electronic device.

[0013] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0014] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0015] Figure 1 An exploded view of an electronic device provided in an embodiment of this application in a closed state is shown;

[0016] Figure 2 A cross-sectional view of an electronic device provided in an embodiment of this application in a closed state is shown;

[0017] Figure 3 A schematic diagram of the antenna structure of an electronic device in a closed state according to an embodiment of this application is shown;

[0018] Figure 4 An exploded view of an electronic device provided in an embodiment of this application in an unfolded state is shown;

[0019] Figure 5 A cross-sectional view of an electronic device provided in an embodiment of this application in an unfolded state is shown;

[0020] Figure 6 A schematic diagram of the antenna structure of an electronic device in an deployed state according to an embodiment of this application is shown;

[0021] Figure 7 This illustration shows a schematic diagram of the signal patterns within a cavity of an electronic device in an unfolded state, according to an embodiment of this application.

[0022] Figure 8 This invention provides a schematic diagram of a first support portion and a second support portion in an electronic device according to an embodiment of the present application.

[0023] Figure 9A schematic diagram of a backplane in an electronic device according to an embodiment of this application is shown;

[0024] Figure 10 A schematic diagram of a backplane in an electronic device according to an embodiment of this application is shown;

[0025] Figure 11 An exploded view of a portion of the structure of an electronic device according to an embodiment of this application is shown in a closed state;

[0026] Figure 12 A schematic diagram of the antenna structure of an electronic device in a closed state according to an embodiment of this application is shown;

[0027] Figure 13 A block diagram illustrating an optimization method for antenna signals in an electronic device according to an embodiment of this application is shown.

[0028] Figures 1 to 12 Figure label:

[0029] 100 Electronic device, 110 First main body, 112 Frame antenna, 114 First side, 116 First antenna body, 118 Second antenna body, 120 Second side, 122 Third antenna body, 124 Fourth antenna body, 126 Third side, 128 First slot, 130 Second slot, 132 First support, 134 First comb teeth, 136 First sidewall, 138 First grounding point, 140 Second grounding point, 142 Third grounding point, 144 Fourth grounding point, 146 Fifth grounding point, 148 First feed point, 150 Second feed point, 152 First switch, 154 Second switch, 160 Second main body, 162 back plate, 164 third arm, 166 fourth arm, 168 first through hole, 170 second through hole, 172 first resonant circuit, 174 second resonant circuit, 176 second support part, 178 second comb tooth, 180 first arm, 182 second arm, 184 third switch, 186 fourth switch, 192 main board, 194 sub-board, 210 first sealing plate, 212 first board body, 214 second board body, 220 second sealing plate, 222 third board body, 224 fourth board body, 230 pivot, 240 folding plate, 250 cavity, 260 screen assembly, 270 flexible conductive component. Detailed Implementation

[0030] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0031] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0032] In the description of this application, it should be understood that the terms "upper" and "inner", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] The following is combined Figures 1 to 13 This application describes an electronic device 100 according to an embodiment of the present application.

[0035] like Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 11As shown, this application provides an electronic device 100, including: a first body 110, the first body 110 including a first sidewall 136; a second body 160, slidably connected to the first body 110, the second body 160 including a back plate 162, the first sidewall 136 corresponding to the first body 110; a pivot 230 disposed on the second body 160; and a screen assembly 260, one end connected to the first body 110 and the other end connected to the second body 160, and the screen assembly 260 wrapped around the pivot 230; wherein, when the electronic device 100 is in an unfolded state, the screen assembly 260, the first sidewall 136, and the back plate 162 form a cavity antenna. The cavity 250 of the cavity antenna can be a cuboid structure. The peripheral sidewalls of the cavity 250 are surrounded by metal. That is, at least a portion of the first body 110 is metal, at least a portion of the back plate 162 is metal, and at least a portion of the screen assembly 260 is metal. The screen component 260 is a flexible screen that can be bent like a conveyor belt.

[0036] And, as Figure 9 As shown, the back plate 162 can be a rectangular structure. The back plate 162 is made of metal. When the electronic device 100 is in the unfolded state, the back plate 162 serves as the bottom floor of the cavity antenna. When the electronic device 100 is in the closed state, it supports the screen assembly 260.

[0037] In the embodiments of this application, the electronic device 100 includes a first body 110, a second body 160, a pivot 230, and a screen assembly 260. The first body 110 and the second body 160 are capable of moving closer to each other. When the first body 110 and the second body 160 move closer to each other to a first predetermined state, the electronic device 100 is in a closed state. The first body 110 and the second body 160 are capable of moving away from each other. When the first body 110 and the second body 160 move away from each other to a second predetermined state, the electronic device 100 is in an unfolded state. One end of the screen assembly 260 is connected to the first body 110, and the other end of the screen assembly 260 is connected to the second body 160 and is wound around the pivot 230 disposed on the second body 160. As the first body 110 and the second body 160 move, the screen assembly 260 is pulled out or retracted into the interior of the first body 110 and the second body 160 through the pivot 230, thereby realizing a rollable screen type electronic device 100. Specifically, the screen assembly 160 includes two length regions, A1 and A2, as follows: Figure 1 and Figure 2 As shown, when the electronic device 100 is in the closed state, region A1 is exposed outside the first body 110 and the second body 160, while region A2 is located inside the first body 110 and the second body 160, as... Figure 4 and Figure 5As shown, when the electronic device 100 is in the unfolded state, most of the A1 and A2 regions are exposed to the outside of the first body 110 and the second body 120.

[0038] In this configuration, the first sidewall 136 of the first body 110 faces the second body 160; that is, the second body 160 has an opening, and the first sidewall 136 of the first body 110 faces the interior of the second body 160 and is inserted into the second body 160. Figure 5 and Figure 6 As shown, when the electronic device 100 is in the unfolded state, the screen assembly 260, the first sidewall 136 of the first main body 110, and the back plate 162 of the second main body 160 form a cavity antenna. The screen assembly 260 has metal components such as copper foil inside, which in turn excites the transverse electric mode (TE mode) and transverse magnetic mode (TM mode) in the cavity 250, so that the antenna energy radiates outward from both sides of the cavity 250. That is, the antenna energy radiates outward through the top and bottom of the electronic device 100, thereby increasing the radiation frequency band of the antenna of the electronic device 100 and improving the antenna performance of the electronic device 100.

[0039] Furthermore, the electronic device 100 also includes a motor capable of driving the rotating shaft 230 to rotate, thereby enabling the electronic device 100 to automatically unfold and close. Alternatively, the rotating shaft 230 in the electronic device 100 may contain a rotatable motor to push the screen assembly 260 to open or roll up.

[0040] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, in one possible implementation, the first sidewall 136 has an arc-shaped structure, and the concave side of the first sidewall 136 faces the rotating shaft 230.

[0041] Specifically, the pivot 230 is disposed on the second body 160, located on the side of the second body 160 away from the first body 110. Consequently, the first sidewall 136 on the first body 110 adopts an arc-shaped structure, and the concave side of the first sidewall 136 faces the pivot 230, thereby adapting the first sidewall 136 to the pivot 230, making full use of the internal space of the electronic device 100 and increasing the aperture of the cavity antenna.

[0042] Furthermore, the first main body 110 is provided with an arc-shaped first sidewall 136 corresponding to the pivot 230. When the electronic device 100 is in the closed state, the arc-shaped first sidewall 136 extends into the interior of the second main body 160 and avoids the pivot 230, and is fastened to one side of the pivot 230, reducing the volume of the electronic device 100 in the closed state. When the electronic device 100 is in the unfolded state, the arc-shaped first sidewall 136 gradually exits the second main body 160 as the first main body 110 moves, and finally is located at the opening of the second main body 160 facing the first main body 110. Thus, the arc-shaped first sidewall 136, the back plate 162 and the screen assembly 260 form a cavity antenna, which radiates outward from the top and bottom of the cavity 250. Thus, the arc-shaped first sidewall 136 can increase the aperture of the cavity 250 and improve the performance of the cavity antenna.

[0043] The first sidewall 136 is made of metal. When the electronic device 100 is in the unfolded state, the back plate 162 serves as the left floor of the cavity antenna. When the electronic device 100 is in the closed state, it isolates the pivot 230 and the circuit board to avoid collision and interference between the two.

[0044] like Figure 1 and Figure 4 As shown, as one possible implementation, it also includes: a first sealing plate 210; a second sealing plate 220, the first sealing plate 210 and the second sealing plate 220 being respectively disposed at both ends of the screen assembly 260; wherein, when the electronic device 100 is in the unfolded state, the cavity antenna radiates through the first sealing plate 210 and the second sealing plate 220.

[0045] Specifically, the second main body 160 also includes a first sealing plate and a second sealing plate 220. The first sealing plate 210 and the second sealing plate 220 are respectively disposed at both ends of the screen assembly 260, that is, at both ends of the back plate 162 and the first side wall 136, so as to seal the top and bottom of the cavity antenna and achieve the sealing of the electronic device 100.

[0046] The first sealing plate 210 includes a first plate 212 and a second plate 214. The first plate 212 is connected to the first main body 110, and the second plate 214 is connected to the second main body 160. The second sealing plate 220 includes a third plate 222 and a fourth plate 224. The third plate 222 is connected to the first main body 110, and the fourth plate 224 is connected to the second main body 160. When the electronic device 100 is in the closed state, the first plate 212 and the second plate 214 are closed, and the third plate 222 and the fourth plate 224 are closed. When the electronic device 100 is in the unfolded state, the first plate 212 and the second plate 214 are separated, and the third plate 222 and the fourth plate 224 are separated.

[0047] As one possible implementation, the first sealing plate 210 and the second sealing plate 220 are plastic plates.

[0048] Specifically, the first sealing plate 210 and the second sealing plate 220 are plastic structures, thereby avoiding shielding of the antenna and ensuring normal radiation of the cavity antenna. The first sealing plate 210 and the second sealing plate 220 in the electronic device 100 are outer frames made of plastic or plastic, placed on the outermost layer of the top of the frame antenna 112 and the outermost layer of the bottom of the frame antenna 112. The first plate 212 and the third plate 222 are fixed at the third side 126, and the second plate 214 and the fourth plate 224 are fixed to the second body 160 and move as the screen assembly 260 opens.

[0049] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, in one possible implementation, it also includes: a motherboard 192 circuit board and a sub-board 194 circuit board, which are electrically connected to power supply points at different locations on the backplane 162.

[0050] Specifically, the electronic device 100 includes a main board 192 and a sub-board 194. The main board 192 is electrically connected to a first position of the backplane 162, and the sub-board 194 is electrically connected to a second position of the backplane 162. Thus, the main board 192 and the sub-board 194 supply power to the power supply points at different positions of the backplane 162, thereby forming a TEmn mode or a TMmn mode.

[0051] The main board 192 and the sub-board 194 are connected to the back plate 162 through different flexible conductive parts 270. The flexible conductive parts 270 can be wires, such as copper wires, silver wires, or flexible circuit boards.

[0052] The main board 192 and the sub-board 194 can be located in different positions within the first main body 110.

[0053] The motherboard 192 and the sub-board 194 are equipped with components such as cameras and chips.

[0054] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, in one possible implementation, the first body 110 includes a frame antenna 112.

[0055] Specifically, the first main body 110 includes a frame antenna 112, meaning that the electronic device 100 includes both a frame antenna 112 and a cavity antenna. When the electronic device 100 is in the unfolded state, it can radiate using the cavity antenna, while when the electronic device 100 is in the closed state, it can radiate using the frame antenna 112. This ensures that the electronic device 100 can radiate in different states, thereby ensuring the stability of the signal of the electronic device 100.

[0056] Furthermore, the cavity antenna is mostly inside the second body 160, while the frame antenna 112 is located in the first body 110, thereby reducing the mutual interference between the two antennas.

[0057] The cavity antenna and the frame antenna 112 can be used simultaneously or individually.

[0058] like Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 8 and Figure 11 As shown, in one possible implementation, the first main body 110 further includes a first support portion 132, and the frame antenna 112 includes a first side 114, a second side 120, and a third side 126. The two ends of the third side 126 are respectively connected to the first side 114 and the second side 120. The second main body 160 includes a second support portion 176, and the first support portion 132 and the second support portion 176 cooperate with each other and can slide relative to each other. The second support portion 176 has a first arm 180 and a second arm 182. When the electronic device 100 is in the closed state, the first arm 180 serves as a parasitic antenna of the first side 114, and the second arm 182 serves as a parasitic antenna of the second side 120.

[0059] Specifically, the first main body 110 includes a frame antenna 112, which is frame-shaped and includes a first side 114, a second side 120 and a third side 126. The first side 114 and the second side 120 are located at both ends of the third side 126.

[0060] like Figure 1 , Figure 3 , Figure 11 and Figure 12As shown, when the electronic device 100 is in the closed state, the second support 176 is suspended above the frame antenna 112, and the first arm 180 is suspended above the first side 114, and the second arm 182 is suspended above the second side 120. At this time, the cavity antenna formed in the electronic device 100 has a harsh environment and poor performance because it houses circuit boards and other components. The first arm 180 acts as a parasitic antenna for the first side 114, and the second arm 182 acts as a parasitic antenna for the second side 120. The first side 114 and the second side 120 are fed to excite the frame antenna 112 to work, and then the first arm 180 and the second arm 182 are coupled to excite the first arm 180 and the second arm 182, thereby compensating for the missing frequency bands that the cavity antenna cannot work.

[0061] The first arm 180 is parallel to the first side 114; the second arm 182 is parallel to the second side 120. The parallelism of the first arm 180 and the first side 114 enhances their radiation effect. Similarly, the parallelism of the second arm 182 and the second side 120 enhances their radiation effect, thereby improving the antenna performance of the electronic device 100.

[0062] like Figure 3 , Figure 6 and Figure 12 As shown, as one possible implementation, the frame antenna 112 can be a conventional slotted antenna. A first slot 128 is provided on the first side 114 to form a slotted antenna, and a second slot 130 is provided on the second side 120 to form a slotted antenna. That is, the first side 114 includes a first antenna body 116 and a second antenna body 118, a first gap 128 is located between the first antenna body 116 and the second antenna body 118, the length of the first antenna body 116 is greater than the length of the second antenna body 118, the first antenna body 116 has a first grounding point 138 and a second grounding point 140, the first grounding point 138 is grounded through a first switch 152, and the second antenna body 118 has a first feed point 148 and a third grounding point 142; the second side 120 includes a third antenna body 122 and a fourth antenna body 124, a second gap 130 is located between the third antenna body 122 and the fourth antenna body 124, the length of the third antenna body 122 is greater than the length of the fourth antenna body 124, the third antenna body 122 has a fourth grounding point 144 and a second feed point 150, the fourth grounding point 144 is grounded through a second switch 154; the third side 126 has a fifth grounding point 146.

[0063] Specifically, the first side 114 includes a first antenna body 116 and a second antenna body 118, which are spaced apart to form a first gap 128. That is, the first antenna body 116 and the second antenna body 118 form a gap antenna. The length of the first antenna body 116 is greater than the length of the second antenna body 118. The second antenna body 118 has a first feed point 148, and the second antenna body 118 is fed through the first feed point 148. The second antenna body 118 is grounded at the third ground point 142. The first antenna body 116 is grounded at the first ground point 138 through the first switch 152, and the second antenna body 118 is grounded at the second ground point 140.

[0064] The second support part 176 is made of metal, and the first support part 132 can be made of metal or other materials. When the electronic device 100 is in the unfolded state, the first support part 132 and the second support part 176 are closed to form a metal plate. Furthermore, the first arm 180 and the second arm 182 on the second support part 176 can serve as parasitic antennas of the frame antenna 112 to generate a new operating frequency band.

[0065] like Figure 3 , Figure 6 and Figure 12 As shown, when the electronic device 100 is in the closed state, the first arm 180 of the second support part 176 is directly above the slotted antenna formed by the first side 114. When energy enters the interior of the first side 114 from the first feed point 148 of the first side 114 of the frame antenna 112, electromagnetic waves are generated by oscillation near the first side 114. These waves are coupled to the suspended first arm 180 at close range through near-field coupling. The length L1 of the first arm 180 is much longer or much shorter than the length of the antenna body of the slotted antenna formed by the first side 114, thereby exciting a new resonant frequency band. Here, L1 is generally a quarter wavelength of the resonant frequency band.

[0066] The first side 114 operates in the low-frequency band (LB) and can be switched within the LB via the first switch 152, thereby increasing the operating frequency band of the first side 114. The LB can be from 600MHz to 1000MHz. The first arm 180 operates in the middle-high frequency band (MHB).

[0067] The second side 120 includes a third antenna body 122 and a fourth antenna body 124, which are spaced apart to form a second gap 130. That is, the third antenna body 122 and the fourth antenna body 124 form a slotted antenna. The length of the third antenna body 122 is greater than the length of the fourth antenna body 124. The third antenna body 122 has a first feed point 148, and the third antenna body 122 is fed through the first feed point 148. The third antenna body 122 is grounded at the fourth ground point 144 through the second switch 154.

[0068] like Figure 3 , Figure 6 and Figure 12 As shown, when the electronic device 100 is in the closed state, the second arm 182 of the second support part 176 is directly above the slotted antenna formed by the second side 120. When energy enters the interior of the second side 120 from the second feed point 150 of the second side 120 of the frame antenna 112, electromagnetic waves are generated by oscillation near the second side 120. These waves are coupled to the suspended second arm 182 at close range through near-field coupling. The length L2 of the second arm 182 is much longer or much shorter than the length of the antenna body of the slotted antenna formed by the second side 120, thereby exciting a new resonant frequency band. Here, L2 is generally a quarter wavelength of the resonant frequency band.

[0069] The second side 120 operates in the MHB (Medium-High Frequency) and can be switched within the MHB via the second switch 154, thereby increasing the operating frequency band of the second side 120. The MHB can be from 1600MHz to 3800MHz. The second arm 182 operates in the LB (Low Frequency).

[0070] The third side 126 is grounded at the fifth grounding point 146.

[0071] The design of the first side 114 and the second side 120 is opposite. When the electronic device 100 is in the closed state, the right side antenna of the frame antenna 112, which has poor performance due to the pivot 230 and the screen assembly 260, can be placed on the floating metal arm, thereby improving the radiation efficiency of the antenna of the electronic device 100.

[0072] The grounding can be achieved by connecting to the grounding plate in the electronic device 100, and the power supply can be achieved by connecting to the circuit board in the electronic device 100.

[0073] like Figure 4 and Figure 5As shown, when the electronic device 100 is in the unfolded state, the first arm 180 and the second arm 182 of the second support part 176 are directly above the first side 114 and the second side 120 of the frame antenna 112. At this time, the energy changes from near-field coupling to far-field coupling, resulting in greater attenuation and lower performance of the suspended metal arm. Therefore, the antenna of the electronic device 100 can be switched to a cavity antenna.

[0074] At this time, the LB+MHB frequency band of the first arm 180 and the second arm 182 will switch to the metal cavity antenna formed by the first main body 110, the back plate 162, the second support part 176 and the screen assembly 260. Energy enters the metal surface inside the cavity 250, specifically, the surface of the back plate 162, and can be excited by appropriate position as follows: Figure 7 The TEmn mode (mn represents the mode number) or TMmn mode (mn represents the mode number) shown are used to radiate energy from the first sealing plate 210 and the second sealing plate 220 of the plastic structure on the upper and lower frames of the electronic device 100. The LB mode can be covered by TE10 and TM10 modes, and the MHB mode can be covered by higher-order modes such as TE20, TM20, TE11, and TM11. Figure 7 The midpoint and the cross indicate the direction of the magnetic field.

[0075] Since the electronic device 100 has been deployed, there are not many cameras or electronic components inside the cavity antenna, so a cavity antenna can be formed. Furthermore, the efficiency and radiation performance of the cavity antenna are superior to those of the suspended metal parasitic arm antenna.

[0076] The structures of the first side 114 and the second side 120 are interchangeable, as are the structures of the first arm 180 and the second arm 182.

[0077] And, as Figure 13 As shown, the antenna of the electronic device 100 provided in this application can operate as follows: First, the state of the electronic device 100 is determined. When the electronic device 100 is in the deployed state, a low-middle-high band (LMHB) is formed, which requires axial excitation. When the electronic device 100 is in the closed state, the first side 114 operates in LB and the second side 120 operates in MHB. Then, through the parasitic connection of the first arm 180 and the second arm 182, the first arm 180 operates in LB and the second arm 182 operates in MHB. The first arm 180 is shorter than the first antenna body 116, and the second arm 182 is longer than the fourth antenna body 124, or the first arm 180 is longer than the first antenna body 116, and the second arm 182 is shorter than the third antenna body 122.

[0078] Because the cavity antenna formed by the unfolded electronic device 100 has a larger antenna area (also known as the radiation aperture) than the general frame antenna 112, its efficiency is relatively high. At the same time, due to the wider current distribution, the radiation impact on the human body (Specific Absorption Rate, SAR) is also relatively low.

[0079] When the electronic device 100 is in the closed state, the first arm 180 and the second arm 182 are able to achieve more frequency bands in the same design space on the frame antenna 112 at the top and bottom of the electronic device 100.

[0080] like Figure 3 and Figure 12 As shown, in one possible implementation, the resonant point of the first arm 180 is grounded through the third switch 184; the resonant point of the second arm 182 is grounded through the fourth switch 186.

[0081] Specifically, the resonant point of the first arm 180 is grounded through the third switch 184, so that the first arm 180 operates in MHB. Furthermore, it can be switched within MHB through the third switch 184, thereby increasing the operating frequency band of the first arm 180. Consequently, the second arm 182 operates in LB, and it can be switched within LB through the fourth switch 186, thereby increasing the operating frequency band of the second arm 182.

[0082] like Figure 1 , Figure 4 , Figure 8 and Figure 11 As shown, in one possible implementation, the first support portion 132 and the second support portion 176 are comb-tooth structures, and when the electronic device 100 is in the closed state, the first support portion 132 and the second support portion 176 are interlocked with each other.

[0083] Specifically, both the first support portion 132 and the second support portion 176 are comb-tooth structures. When the electronic device 100 is in the closed state, the first support portion 132 and the second support portion 176 are interlocked. The first support portion 132 has a first comb tooth 134, and the second support portion 176 has a second comb tooth 178. The first comb tooth 134 and the second comb tooth 178 cooperate with each other. The first support arm 180 and the second support arm 182 are located at both ends of the second comb tooth 178 and are spaced apart from the first comb tooth 134 and the second comb tooth 178.

[0084] That is, the first support part 132 is provided with a first comb tooth 134, and the second support part 176 is provided with a second comb tooth 178. The first comb tooth 134 and the second comb tooth 178 are staggered, so that the first support part 132 and the second support part 176 can be interlocked. Thus, when the electronic device 100 is in the closed state, the first support part 132 and the second support part 176 are fully interlocked to support the screen assembly 260. When the electronic device 100 is in the unfolded state, the first support part 132 and the second support part 176 are separated to a certain extent to support the screen assembly 260.

[0085] Furthermore, the first arm 180 and the second arm 182 are located at both ends of the second comb tooth 178 and are spaced apart from the first comb tooth 134 and the second comb tooth 178. Since the first arm 180 and the second arm 182 have a certain clearance, there is a distance d1 between the first arm 180 and the first comb tooth 134 and the second comb tooth 178, and a distance d2 between the second arm 182 and the first comb tooth 134 and the second comb tooth 178, thereby achieving the clearance required for the first arm 180 and the second arm 182 and improving the antenna effect of the electronic device 100.

[0086] like Figure 10 , Figure 11 and Figure 12 As shown, in one possible implementation, the backplate 162 includes a third arm 164 and a fourth arm 166. The third arm 164 is disposed corresponding to the first side 114, and the resonant point of the third arm 164 is grounded through the first resonant circuit 172. The fourth arm 166 is disposed corresponding to the second side 120, and the resonant point of the fourth arm 166 is grounded through the second resonant circuit 174. When the electronic device 100 is in the closed state, the third arm 164 serves as a parasitic antenna for the first side 114, and the fourth arm 166 serves as a parasitic antenna for the second side 120.

[0087] Specifically, the backplate 162 includes a third arm 164 and a fourth arm 166. The third arm 164 is correspondingly arranged with the first side 114. When the electronic device 100 is in the closed state, the third arm 164 serves as a parasitic antenna for the first side 114. That is, the first arm 180 and the third arm 164 are located above and below the first side 114, respectively, thus forming a dual parasitic antenna structure. The excitation principle of the third arm 164 and the first arm 180 is the same, thereby further increasing the operating frequency band of the antenna. The fourth arm 166 serves as a parasitic antenna for the second side 120. That is, the second arm 182 and the fourth arm 166 are located above and below the second side 120, respectively, thus forming a dual parasitic antenna structure. The excitation principle of the fourth arm 166 and the second arm 182 is the same, thereby further increasing the operating frequency band of the antenna.

[0088] When the electronic device 100 is in the closed state, the third arm 164 is located directly below the first side 114. At this time, the LMHB is composed of the frame antenna 112 and the first arm 180. The operating frequency band of the third arm 164 can be 5G (n41 / n78 / n78) or WIFI antenna and GPS frequency bands. Its length L3 is approximately one-quarter wavelength of the frequency band that excites it and will not change with any switch switching.

[0089] Similarly, the fourth arm 166 is located directly below the second side 120. At this time, the LMHB is composed of the frame antenna 112 and the second arm 182. The operating frequency band of the fourth arm 166 can be 5G (n41 / n78 / n78) or the frequency band of WIFI antenna and GPS, etc. Its length L4 is about a quarter wavelength of the frequency band that excites it and will not change with any switch switching.

[0090] Furthermore, the resonant point of the third arm 164 is grounded through the first resonant circuit 172 to tune the resonant frequency of the third arm 164. The resonant point of the fourth arm 166 is grounded through the second resonant circuit 174 to tune the resonant frequency of the fourth arm 166.

[0091] Furthermore, by setting a third arm 164 and a fourth arm 166 on the back panel 162, the antenna can cover more frequency bands, such as 5G / WIFI frequency bands, thereby improving the antenna coverage frequency band of the electronic device 100. In other words, a single antenna in this area can cover all frequency bands of the commonly used antennas of the electronic device 100.

[0092] like Figure 10 , Figure 11 and Figure 12As shown, in one possible implementation, the back plate 162 has a first through hole 168 and a second through hole 170. The first through hole 168 is L-shaped to form a third support arm 164, and the second through hole 170 is L-shaped to form a fourth support arm 166.

[0093] Specifically, the third arm 164 is formed by setting an L-shaped first through hole 168 on the back plate 162, and the fourth arm 166 is formed by setting an L-shaped second through hole 170 on the back plate 162, thereby reducing the processing difficulty of the third arm 164 and the fourth arm 166 on the back plate 162.

[0094] The back panel 162 has a rectangular plate-like structure.

[0095] Furthermore, the electronic device 100 can be a mobile phone, tablet computer, laptop computer, wearable device, or e-reader, etc.

[0096] like Figure 2 and Figure 4 As shown, in one possible implementation, the first body 110 of the electronic device 100 is also provided with a folding plate 240. The folding plate 240 is composed of multiple plates. When unfolded, it can be combined into a whole by magnets in each plate. When folded, it is located on the back of the electronic device 100 near the third side 126.

[0097] In the description of this specification, references to terms such as "an embodiment" or "specific embodiment" indicate that a particular feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0098] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An electronic device, characterized in that, include: A first body, the first body including a first sidewall; The second body is slidably connected to the first body, and the second body includes a back plate, with the first sidewall corresponding to the first body; The pivot is located in the second main body; A screen assembly, one end of which is connected to the first main body and the other end of which is connected to the second main body, and the screen assembly is wound around the pivot. In the unfolded state of the electronic device, the screen assembly, the first sidewall, and the back panel form a cavity antenna. The first main body includes a frame antenna; The first main body also includes a first support portion, and the frame antenna includes a first side, a second side and a third side, with the two ends of the third side connected to the first side and the second side respectively; The second main body includes a second support portion, the first support portion and the second support portion cooperate and can slide relative to each other, and the second support portion has a first arm and a second arm; The first arm is parallel to the first side, and the second arm is parallel to the second side. When the electronic device is in the closed state, the first arm serves as a parasitic antenna for the first side, and the second arm serves as a parasitic antenna for the second side.

2. The electronic device according to claim 1, characterized in that, The first sidewall has an arc-shaped structure, and the concave side of the first sidewall faces the pivot.

3. The electronic device according to claim 1, characterized in that, Also includes: First sealing plate; The second sealing plate, the first sealing plate and the second sealing plate are respectively disposed at both ends of the screen assembly; When the electronic device is in the deployed state, the cavity antenna radiates through the first sealing plate and the second sealing plate.

4. The electronic device according to claim 3, characterized in that, The first sealing plate and the second sealing plate are plastic plates.

5. The electronic device according to claim 1, characterized in that, Also includes: The motherboard circuit board and the sub-board circuit board are electrically connected to power supply points at different locations on the backplate.

6. The electronic device according to claim 1, characterized in that, The first support portion and the second support portion are comb-tooth structures, and when the electronic device is in the closed state, the first support portion and the second support portion are interlocked with each other.

7. The electronic device according to claim 1, characterized in that, The backplate includes a third arm and a fourth arm. The third arm is disposed corresponding to the first side and the resonant point of the third arm is grounded through a first resonant circuit. The fourth arm is disposed corresponding to the second side and the resonant point of the fourth arm is grounded through a second resonant circuit. When the electronic device is in the closed state, the third arm serves as a parasitic antenna on the first side, and the fourth arm serves as a parasitic antenna on the second side.

8. The electronic device according to claim 7, characterized in that, The back plate has a first through hole and a second through hole, the first through hole being L-shaped to form the third support arm, and the second through hole being L-shaped to form the fourth support arm.

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