Electronic devices

Abstract

The present application provides an electronic device, the electronic device comprising a middle frame assembly and an antenna assembly, the middle frame assembly having a cavity with a cavity wall made of metal; the antenna assembly comprising a first radiator and a second radiator arranged at intervals; wherein the first radiator is arranged outside the cavity, the radiation direction of the first radiator is partially toward the cavity, and the second radiator is arranged between the first radiator and the cavity to improve the isolation between the first radiator and the cavity. The electronic device provided in an embodiment of the present application improves the isolation between the cavity and the first radiator by arranging the second radiator between the cavity of the middle frame assembly and the first radiator, so as to improve the radiation efficiency of the first radiator and reduce the influence of the cavity mode.

Description

Technical Field

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

[0002] Flexible screen, namely flexible Organic Light-Emitting Diode (OLED) screen, has the characteristics of being able to be bent arbitrarily, being thin and light, and saving power. With the development of flexible screen technology, flexible screen devices are becoming the mainstream of screen displays in the future.

[0003] In the related art, the flexible screen of electronic devices (mobile phones, tablet computers, laptops, wearable devices, etc.) can switch between different display areas by sliding and shrinking. However, when the electronic device is closed, the efficiency of the antenna will be reduced due to the presence of the cavity. Summary of the invention

[0004] An embodiment of the present application provides an electronic device, which includes a middle frame assembly and an antenna assembly, wherein the middle frame assembly has a cavity whose cavity wall is made of metal; the antenna assembly includes a first radiator and a second radiator that are spaced apart; wherein the first radiator is disposed outside the cavity, a radiation direction of the first radiator is partially directed toward the cavity, and the second radiator is disposed between the first radiator and the cavity to improve the isolation between the first radiator and the cavity.

[0005] The electronic device provided in the embodiment of the present application improves the isolation between the cavity and the first radiator by arranging a second radiator between the cavity of the middle frame assembly and the first radiator, that is, the first radiator can be coupled to the second radiator, and the cavity with a cavity wall made of metal can be equivalent to a cavity antenna, and the cavity antenna can also be coupled to the second radiator, thereby forming reverse coupling currents on the second radiator and canceling each other out, so that the electromagnetic wave signal of the first radiator does not enter the cavity, but is attracted by the second radiator, thereby improving the radiation efficiency of the first radiator and reducing the influence of the cavity mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0007] Figure 1 is a schematic diagram of the structure of an electronic device when it is folded in some embodiments of the present application;

[0008] Figure 2 yes Figure 1 A schematic diagram of the structure of the electronic device when it is opened in the embodiment;

[0009] Figure 3 yes Figure 2 A schematic diagram of the structural disassembly of the electronic device in the embodiment;

[0010] Figure 4 is a schematic diagram of a portion of the structure of an electronic device in a first posture in some embodiments of the present application;

[0011] Figure 5 is a schematic diagram of a portion of the structure of an electronic device in a second posture in some embodiments of the present application;

[0012] Figure 6 yes Figure 5 A schematic diagram of the enlarged local structure of region A in the embodiment;

[0013] Figure 7 is a partial structural schematic diagram of an electronic device in some embodiments of the present application;

[0014] Figure 8 yes Figure 7 Schematic diagram of an equivalent model for antenna efficiency analysis in an embodiment;

[0015] Fig. 9 is a schematic diagram of comparison of antenna efficiency simulation of electronic devices in some embodiments of the present application;

[0016] Fig.10 It is a schematic diagram of the structural composition of mobile terminal devices in other embodiments of the present application. DETAILED DESCRIPTION

[0017] The present application is further described in detail below in conjunction with the accompanying drawings and examples. It is particularly noted that the following examples are only used to illustrate the present application, but are not intended to limit the scope of the present application. Similarly, the following examples are only some embodiments of the present application rather than all embodiments, and all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0018] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0019] As used herein, "electronic devices" (or simply "terminals") include, but are not limited to, devices configured to receive / send communication signals via a wireline connection (e.g., via a public switched telephone network (PSTN), a digital subscriber line (DSL), a digital cable, a direct cable connection, and / or another data connection / network) and / or via a wireless interface (e.g., for a cellular network, a wireless local area network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter, and / or another communication terminal). Communication terminals configured to communicate via a wireless interface may be referred to as "wireless communication terminals", "wireless terminals" or "mobile terminals". Examples of mobile terminals include, but are not limited to, satellite or cellular phones; personal communication system (PCS) terminals that may combine cellular radiotelephones with data processing, fax, and data communication capabilities; PDAs that may include radiotelephones, pagers, Internet / intranet access, web browsers, organizers, calendars, and / or global positioning system (GPS) receivers; and conventional laptop and / or palmtop receivers or other electronic devices that include radiotelephone transceivers. A mobile phone is an electronic device equipped with a cellular communication module.

[0020] It should be noted that the electronic device in the embodiments of the present application is mainly an electronic device with a flexible screen structure, wherein the flexible screen can be folded or unfolded on the electronic device by sliding and retracting. It can be understood that the electronic device in the present application may include mobile phones, tablet computers, laptops, wearable devices and other electronic devices with flexible screen structures.

[0021] See also Figures 1 to 3 , Figure 1 is a schematic diagram of the structure of the electronic device 100 when it is folded in some embodiments of the present application, Figure 2 yes Figure 1 A schematic diagram of the structure of the electronic device 100 when it is opened in the embodiment, Figure 3 yes Figure 2 Schematic diagram of the structural disassembly of the electronic device 100 in the embodiment.

[0022] The electronic device 100 may generally include a first housing 10, a second housing 20, and a flexible screen 30. The first housing 10 and the second housing 20 are slidably connected. Figure 1 The three directions X, Y and Z of the electronic device 100 are shown in the figure, mainly to illustrate the sliding direction of the second housing 20 relative to the first housing 10 and the three planes XY, XZ and YZ, so as to facilitate the corresponding description in the following text. Specifically, Figure 1 The Z direction shown in the figure is roughly the thickness direction of the electronic device 100 , the Y direction is roughly the movement direction of the second shell 20 relative to the first shell 10 , and the XY plane is roughly parallel to the display surface of the electronic device 100 .

[0023] Furthermore, the first housing 10 and the second housing 20 can slide in a direction close to each other, so that the electronic device 100 presents the following Figure 1 The first housing 10 and the second housing 20 can slide in a direction away from each other, so that the electronic device 100 is in the collapsed state as shown. Figure 2 The open state shown. Among them, the definition Figure 1 The collapsed state shown in FIG. 1 is the first posture of the electronic device 100, and the definition Figure 2 The open state shown in FIG. 1 is the second posture of the electronic device 100 , so as to facilitate the corresponding description below.

[0024] The first housing 10 has a first cavity 101. That is, the first housing 10 generally includes a first side wall 110, a second side wall 120 that are oppositely disposed, and a first bottom wall 150 that is connected between the first side wall 110 and the second side wall 120. The first side wall 110, the second side wall 120, and the first bottom wall 150 cooperate to enclose and form the first cavity 101.

[0025] In some embodiments, the first housing 10 may further include a third side wall 130, which is disposed between the first side wall 110 and the second side wall 120 and is located on a side of the first bottom wall 150 away from the second housing 20. The third side wall 130 may be an arc-shaped side wall, and the third side wall 130 is bent and connected to the first bottom wall 150. The third side wall 130 cooperates with the first side wall 110, the second side wall 120 and the first bottom wall 150 to enclose and form the first cavity 101.

[0026] The second shell 20 is partially accommodated in the first cavity 101 of the first shell 10 , and the second shell 20 is configured to be partially slidable and retractable in the first cavity 101 , that is, the second shell 20 can be slid open and closed relative to the first shell 10 in the Y direction.

[0027] The second housing 20 has a second cavity 201. That is, the second housing 20 generally includes a first side frame 210, a second side frame 220 that are arranged opposite to each other, and a first bottom frame 250 that is connected between the first side frame 210 and the second side frame 220. The first side frame 210, the second side frame 220 and the first bottom frame 250 cooperate to surround and form the second cavity 201.

[0028] In some embodiments, the second housing 20 may further include a third side frame 230, which is disposed between the first side frame 210 and the second side frame 220 and is located on the side of the first bottom frame 250 away from the first housing 10. The third side frame 230 may be an arc-shaped sidewall structure, and the third side frame 230 is bent and connected to the first bottom frame 250. The third side frame 230 cooperates with the first side frame 210, the second side frame 220 and the first bottom frame 250 to form the second cavity 201. The second cavity 201 is connected to the first cavity 101. In the first posture, the accommodating spaces of the first cavity 101 and the second cavity 201 partially overlap, and in the second posture, the boundary areas of the first cavity 101 and the second cavity 201 are connected.

[0029] The first side frame 210 and the second side frame 220 of the second housing 20 are respectively connected to the first side wall 110 and the second side wall 120 of the first housing 10 in a sliding manner, so that the second housing 20 can slide and open relative to the first housing 10. The first bottom frame 250 is stacked with the first bottom wall 150 in a direction orthogonal to the XY plane (i.e., in the Z direction), and can slide relative to the first bottom wall 150, so that the electronic device 100 can switch between the first posture and the second posture. Taking the sliding connection between the first side frame 210 and the first side wall 110 as an example, it can be understood that the sliding connection method of the second side frame 220 and the second side wall 120 is substantially the same as the sliding connection method of the first side frame 210 and the first side wall 110, so it will not be repeated. Among them, one of the first side frame 210 and the first side wall 110 is provided with a slide groove, and the other is provided with a slider, and the slider cooperates with the slide groove to enable the first side frame 210 and the first side wall 110 to achieve a sliding connection.

[0030] Of course, in other embodiments, the first side frame 210 and the first side wall 110 may also be slidably connected by other connection methods, which will not be described in detail.

[0031] It should be noted that the terms "first", "second", and "third" in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include at least one of the features.

[0032] Among them, the flexible screen 30 is configured to be able to switch between a large screen state and a small screen state by sliding and retracting. In the first posture, the flexible screen 30 is in a small screen state, part of the flexible screen 30 is accommodated in the first cavity 101, and the other part is exposed to the electronic device 100 so that the flexible screen 30 can achieve a small screen display effect. In the second posture, the flexible screen 30 is in a large screen state, that is, when the first shell 10 and the second shell 20 are unfolded, the part of the flexible screen 30 accommodated in the first cavity 101 is gradually pulled out, so that the flexible screen 30 can achieve a large screen display effect.

[0033] In one embodiment, the electronic device 100 may further include a middle frame assembly 40 for supporting the flexible screen 30, that is, the middle frame assembly 40 is configured to support the portion of the flexible screen 30 exposed to the electronic device 100. In addition, when the first shell 10 and the second shell 20 perform relative movement to switch between the first posture and the second posture, the posture of the middle frame assembly 40 changes synchronously, so that the middle frame assembly 40 can continue to support the portion of the flexible screen 30 exposed to the electronic device 100. In the first posture, the space of the first cavity 101 and the second cavity 201 partially overlap, and in the second posture, the boundary area of ​​the first cavity 101 and the second cavity 201 is connected. That is, the first cavity 101 and the second cavity 201 cooperate to form the accommodating space inside the electronic device 100, and during the relative movement of the first shell 10 and the second shell 20, the middle frame assembly 40 is arranged in the accommodating space of the electronic device 100 and can change its posture with the above relative movement.

[0034] The electronic device provided in the embodiment of the present application can switch between a large screen state and a small screen state at will by setting a first shell and a second shell that are slidably connected, thereby achieving different display effects. In addition, during the opening and closing of the first shell and the second shell, the overall thickness of the electronic device remains almost unchanged, thereby improving the user experience.

[0035] Of course, in other embodiments, the second shell 20 can be connected to and support part of the flexible screen 30. For example, the end of the flexible screen 30 adjacent to the third side frame 230 is connected to the side of the third side frame 230 away from the first bottom frame 250. Among them, the flexible screen 30 can be bonded to the second shell 20 by a colloid, for example, the flexible screen 30 and the second shell 20 and / or the middle frame assembly 40 can be bonded by double-sided tape, optical adhesive, etc. It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0036] Please refer to Figure 4 and Figure 5 , Figure 4 is a schematic diagram of a portion of the structure of the electronic device 100 in a first posture in some embodiments of the present application, Figure 5 1 is a partial structural diagram of the electronic device 100 in the second posture in some embodiments of the present application. The electronic device 100 is provided with an antenna assembly 50, and the antenna assembly 50 is configured to realize the function of transmitting and receiving electromagnetic wave signals.

[0037] It can be understood that in the first posture, the support surface area of ​​the middle frame assembly 40 supporting the flexible screen 30 is relatively small, and in the second posture, the support surface area of ​​the middle frame assembly 40 supporting the flexible screen 30 is relatively large. Therefore, for the consistency of the following description, the first posture of the electronic device 100 can also be defined as the first posture of the middle frame assembly 40, and the second posture can also be defined as the second posture of the middle frame assembly 40.

[0038] The middle frame assembly 40 generally includes a first middle frame 410 and a second middle frame 420 that can perform relative movement, that is, the first middle frame 410 and the second middle frame 420 can perform relative movement so that the electronic device 100 and the middle frame assembly 40 can switch between a first posture and a second posture. In other words, in the first posture, the first middle frame 410 and the second middle frame 420 move toward each other, and in the second posture, the first middle frame 410 and the second middle frame 420 move away from each other.

[0039] The first middle frame 410 is received in the first cavity 101 of the first shell 10 and connected to the first shell 10, so that the first middle frame 410 can move synchronously with the first shell 10. The second middle frame 420 is received in the second cavity 201 of the second shell 20 and connected to the second shell 20, so that the second middle frame 420 can move synchronously with the second shell 20.

[0040] Optionally, the first middle frame 410 can be fixedly connected or detachably connected to the first shell 10 by means of threaded connection, snap connection, bonding, welding, etc. The second middle frame 420 can be fixedly connected or detachably connected to the second shell 20 by means of threaded connection, snap connection, bonding, welding, etc.

[0041] Optionally, the first middle frame 410 generally includes a first middle plate 411 and a first frame 412 that are bent and connected, and the first middle plate 411 and the first frame 412 cooperate to surround and form a first slot 413 of the first middle frame 410. Preferably, the first middle plate 411 is stacked with the first bottom wall 150 in a direction orthogonal to the XY plane (i.e., in the Z direction). The first frame 412 surrounds part of the outer periphery of the first middle plate 411, that is, the first frame 412 is arranged on one side of the first middle plate 411 adjacent to the third side wall 130, and is arranged opposite to the third side wall 130 along the Y direction.

[0042] Optionally, the second middle frame 420 generally includes a second middle plate 421 and a second frame 422 that are bent and connected, and the second middle plate 421 and the second frame 422 cooperate to surround and form a second slot 423 of the second middle frame 420. Preferably, the second middle plate 421 is spaced apart from the first bottom frame 250 in a direction orthogonal to the XY plane (i.e., in the Z direction). The second frame 422 surrounds part of the outer periphery of the second middle plate 421, that is, the second frame 422 is disposed on a side of the second middle plate 421 adjacent to the third side frame 230, and is disposed opposite to the third side frame 230 along the Y direction.

[0043] The slot spaces of the first slot body 413 and the second slot body 423 are connected. That is, in the first posture, the slot spaces of the first slot body 413 and the second slot body 423 partially overlap, and in the second posture, the adjacent boundary areas of the first slot body 413 and the second slot body 423 are connected.

[0044] The first middle plate 411 and the second middle plate 421 can move relative to each other, that is, when the middle frame assembly 40 switches from the first posture to the second posture, the first middle plate 411 and the second middle plate 421 move away from each other, and when the middle frame assembly 40 switches from the second posture to the first posture, the first middle plate 411 and the second middle plate 421 move toward each other. The first middle plate 411 and the second middle plate 421 are spaced apart in a direction orthogonal to the XY plane (i.e., in the Z direction). The first frame 412 and the second frame 422 are located on opposite sides of the middle frame assembly 40, the first frame 412 is disposed adjacent to the third side wall 130, and the second frame 422 is disposed adjacent to the third side frame 230.

[0045] There is a first gap 401 between the first middle plate 411 and the first shell 10, and a second gap 402 between the second middle plate 421 and the second shell 20. The antenna assembly 50 is partially suspended in the first gap 401 and / or the second gap 402 for transmitting and receiving electromagnetic wave signals.

[0046] Optionally, the antenna assembly 50 may be a mixture of one or more of a flexible printed circuit (FPC) antenna, a laser direct structuring (LDS) antenna, a printed direct structuring (PDS) antenna, and a metal branch antenna. Of course, the antenna assembly 50 may also be other types of antennas, which will not be described in detail. Optionally, the antenna assembly 50 may be a mixture of one or more of the forms of strips, sheets, rods, coatings, films, etc., but is not limited to the forms listed here. It can be understood that the "first radiator", "second radiator", etc. mentioned below can be understood as branches of the antenna assembly 50, and its molding method, shape, etc. can refer to the above description, so it will not be repeated below.

[0047] Combined with reference Figure 6 , Figure 6 yes Figure 5 A schematic diagram of the enlarged local structure of the A area in the embodiment. The antenna assembly 50 generally includes a first radiator 510 and a second radiator 520 arranged at intervals, the first radiator 510 can be used to send and receive electromagnetic wave signals, and the second radiator 520 is arranged at intervals from the first radiator 510 and is configured to form a distributed capacitive coupling structure with the first radiator 510. Preferably, the second radiator 520 and the first radiator 510 are arranged side by side along the X direction to form a distributed capacitive coupling structure. The current signal on the first radiator 510 can be fed to the second radiator 520 in a capacitive coupling manner.

[0048] It is understandable that the first radiator 510 can be used alone or in combination with the second radiator 520. In the antenna assembly 50, the usage mode and frequency band information of the first radiator 510 and the second radiator 520 can be set according to actual needs.

[0049] The first radiator 510 has a first end 511 and a second end 512, the first end 511 is configured to be connected to the middle frame assembly 40, and there is a gap between the second end 512 and the middle frame assembly 40. The portion of the first radiator 510 located between the first end 511 and the second end 512 is suspended in the first gap 401 and / or the second gap 402.

[0050] like Figure 6As shown, the first end 511 of the first radiator 510 is connected to the first middle plate 411, and there is a gap between the second end 512 and the first middle plate 411. The first gap 401 may be a gap between the first middle plate 411 and the first side wall 110 and / or the second side wall 120 of the first housing 10. The portion of the first radiator 510 between the first end 511 and the second end 512 is suspended in the first gap 401, and the portion of the first radiator 510 suspended in the first gap 401 is arranged side by side with the second radiator 520 in the X direction.

[0051] Of course, in other embodiments, the first end 511 of the first radiator 510 is connected to the second middle plate 421, and there is a gap between the second end 512 and the second middle plate 421. The second gap 402 may be a gap between the second middle plate 421 and the first side frame 210 and / or the second side frame 220 of the second housing 20. The portion of the first radiator 510 between the first end 511 and the second end 512 is suspended in the second gap 402, and the portion of the first radiator 510 suspended in the second gap 402 is arranged side by side with the second radiator 520 in the X direction.

[0052] like Figure 6 As shown, the first radiator 510 and the second radiator 520 can be connected to the first middle plate 411 or the second middle plate 421. In the first posture and the second posture, the second radiator 520 and the first radiator 510 are arranged side by side along the X direction to form a distributed capacitive coupling structure.

[0053] Of course, in other embodiments, one of the first radiator 510 and the second radiator 520 is connected to the first middle plate 411, and the other is connected to the second middle plate 421. In the first posture, the second radiator 520 and the first radiator 510 are arranged side by side along the X direction to form a distributed capacitive coupling structure; in the second posture, the second radiator 520 and the first radiator 510 are misaligned in the relative movement direction (i.e., the Y direction) of the first middle plate 411 and the second middle plate 421.

[0054] See also Figure 7 and Figure 8 , Figure 7 is a partial structural diagram of an electronic device 100 in some embodiments of the present application, Figure 8 yes Figure 7Schematic diagram of an equivalent model for antenna efficiency analysis in an embodiment. The middle frame assembly 40 has a cavity 403 that can be used to accommodate components of the electronic device 100, the first radiator 510 is arranged outside the cavity 403, and the radiation direction of the first radiator 510 is partially toward the cavity 403, and the second radiator 520 is arranged between the first radiator 510 and the cavity 403 to improve the isolation between the first radiator 410 and the cavity 403, thereby improving the antenna efficiency of the antenna assembly 50. Among them, the first gap 401 is located between the cavity 403 and the first shell 10, and the second gap 402 is located between the cavity 403 and the second shell 20.

[0055] It should be noted that, based on the overall structural setting of the electronic device 100, the side of the cavity 403 facing the antenna assembly 50 is generally an open structure, that is, the cavity 403 has a window 404 with an opening direction facing the antenna assembly 50. The radiation signal part of the first radiator 510 can be incident into the cavity 403 through the window 404. The second radiator 520 is arranged between the window 404 and the first radiator 510 to form a distributed capacitive coupling structure with the first radiator 510, thereby avoiding the influence of the cavity 403 on the antenna efficiency of the first radiator 510.

[0056] like Figure 8 As shown, when the cavity wall of the cavity 403 is made of metal, the cavity 403 can be equivalent to the cavity antenna 403. At this time, when the first radiator 510 is opposite to the cavity 403, that is, the radiation direction of the first radiator 510 is partially toward the cavity 403, the electromagnetic wave signal received and sent by the first radiator 510 will be affected by the cavity antenna, so that the antenna efficiency is deteriorated. In the embodiment of the present application, the second radiator 520 is arranged between the first radiator 510 and the cavity 403, and the second radiator 520 and the first radiator 510 form a distributed capacitive coupling structure, and the second radiator 520 and the cavity antenna can also form a distributed capacitive coupling structure.

[0057] The material of the middle frame assembly 40 may be metal, so as to form a cavity 403 with a cavity wall made of metal. Of course, in other embodiments, the material of the middle frame assembly 40 may also be plastic or other materials, and a metal surface layer is provided on the middle frame assembly 40 to form a cavity 403 with a cavity wall made of metal.

[0058] That is, when in use, the first radiator 510 is coupled to the second radiator 520, and the cavity antenna formed by the cavity 403 is also coupled to the second radiator 520. The coupling current is reversely offset, so that the electromagnetic wave signal of the first radiator 510 does not enter the cavity 403, but is attracted by the second radiator 520. This can improve the radiation efficiency of the first radiator 510 and reduce the influence of the cavity mode.

[0059] See again Figure 6 The second radiator 520 has a third end 521 and a fourth end 522, the third end 521 is configured to be connected to the middle frame assembly 40, and the fourth end 522 is located on the side of the first radiator 510 close to the cavity 403. That is, the portion of the second radiator 520 located between the third end 521 and the fourth end 522 is suspended in the first gap 401 and / or the second gap 402. The third end 521 of the second radiator 520 is disposed adjacent to the second end 512 of the first radiator 510. The third end 521 can be used as a grounding point through a conductor disposed in the middle frame assembly 40.

[0060] Further, the length of the second radiator 520 extending from the third end 521 to the fourth end 522 is approximately 3-10 mm to ensure the coupling effect, for example, it can be 4 mm, 6 mm, 8 mm, etc. Preferably, the distance between the third end 521 and the fourth end 522 of the second radiator 520 is approximately 3-10 mm, for example, it can be 4 mm, 6 mm, 8 mm, etc. to ensure the coupling effect.

[0061] Understandably, Figure 6 The illustration in which the first radiator 510 and the second radiator 520 are both connected to the first middle plate 411 is only exemplarily illustrated. The illustrations in which the first radiator 510 and the second radiator 520 are both connected to the second middle plate 421, and the illustrations in which the first middle plate 411 and the second middle plate 421 are respectively connected, can be directly derived by those skilled in the art based on the description in this article. That is, other relevant illustrations directly derived by those skilled in the art based on the relevant description in this article should be understood as the scope of protection of this application.

[0062] As mentioned above, the cavity 403 is formed between the first middle plate 411 and the second middle plate 412. Specifically, at least one of the first middle plate 411 and the second middle plate 412 is provided with a surrounding wall 430, and the surrounding wall 430 is provided between the first middle plate 411 and the second middle plate 412. The two opposite sides of the surrounding wall 430 respectively contact the first middle plate 411 and the second middle plate 412, and cooperate with the first middle plate 411 and the second middle plate 412 to form the cavity 403 having the window 404.

[0063] In one embodiment, based on the operating frequency of the first radiator 510, the sliding stroke of the first middle plate 411 relative to the second middle plate 412 can be defined, that is, in the embodiment of the present application, the sliding stroke of the first middle plate 411 relative to the second middle plate 412 is designed to be greater than 1 / 2 of the wavelength corresponding to the operating frequency of the first radiator 510.

[0064] See also Fig. 9 , Fig. 9It is a schematic diagram comparing the simulation effects of the antenna efficiency of the electronic device 100 in some embodiments of the present application. In the figure, curve 1 is a schematic diagram of the antenna efficiency when a second radiator 520 is provided between the first radiator 510 and the cavity 403, and curve 2 is a schematic diagram of the antenna efficiency when the second radiator 520 is removed between the first radiator 510 and the cavity 403.

[0065] Depend on Fig. 9 It can be seen that when the operating frequency is approximately in the 5-6 GHz frequency band, the antenna efficiency corresponding to curve 1 is significantly better than the antenna efficiency corresponding to curve 2. Fig. 9 As shown in point A and point B in the figure, the operating frequencies corresponding to point A and point B are approximately 5.2874 GHz, the antenna efficiency corresponding to point A in curve 1 is approximately -3.2738 dB, and the antenna efficiency corresponding to point B in curve 2 is approximately -5.1900 dB. Obviously, the antenna efficiency corresponding to point A in curve 1 is approximately 2 dB higher than the antenna efficiency corresponding to point B in curve 2.

[0066] The electronic device provided in the embodiment of the present application improves the isolation between the cavity and the first radiator by arranging a second radiator between the cavity of the middle frame assembly and the first radiator, that is, the first radiator can be coupled to the second radiator, and the cavity antenna formed by the cavity can also be coupled to the second radiator, forming reverse coupling currents on the second radiator and canceling each other out, so that the electromagnetic wave signal of the first radiator does not enter the cavity but is attracted by the second radiator, thereby improving the radiation efficiency of the first radiator and reducing the influence of the cavity mode.

[0067] In addition, the present application also provides a mobile terminal device, see Fig.10 , Fig.10 It is a schematic diagram of the structure of the mobile terminal device 900 in other embodiments of the present application. The mobile terminal device 900 can be a mobile phone, a tablet computer, a laptop computer, a wearable device, etc. The embodiment of the present application is illustrated with a mobile phone as an example. The structure of the mobile terminal device 900 can generally include an RF circuit 910 (i.e., the antenna assembly in the above embodiment), a memory 920, an input unit 930, a display unit 940, a sensor 950, an audio circuit 960, a wifi module 970, a processor 980, and a power supply 990. Among them, the RF circuit 910, the memory 920, the input unit 930, the display unit 940, the sensor 950, the audio circuit 960, and the wifi module 970 are respectively connected to the processor 980; the power supply 990 is used to provide power to the entire mobile terminal device 900.

[0068] Specifically, the RF circuit 910 is used to receive and send signals; the memory 920 is used to store data instruction information; the input unit 930 is used to input information, which may specifically include a touch panel 931 and other input devices 932 such as operation buttons; the display unit 940 may include a display panel 941 (i.e., the flexible screen 30 in the above embodiment); the sensor 950 includes an infrared sensor, a laser sensor, etc., for detecting user approach signals, distance signals, etc.; the speaker 961 and the microphone (or microphone) 962 are connected to the processor 980 through the audio circuit 960 for receiving and sending sound signals; the wifi module 970 is used to receive and transmit wifi signals, and the processor 980 is used to process data information of the mobile terminal device. For the relevant technical features of the display panel, please refer to the relevant description of the flexible screen in the above embodiment, which will not be described in detail here.

[0069] It should be noted that the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0070] The above descriptions are only some embodiments of the present application, and do not limit the protection scope of the present application. Any equivalent device or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An electronic device, characterized in that: include: A middle frame assembly, wherein the middle frame assembly has a cavity whose cavity wall is made of metal; as well as The antenna assembly comprises a first radiator and a second radiator arranged at an interval; Wherein, the first radiator is arranged outside the cavity, the radiation direction of the first radiator is partially toward the cavity, and the second radiator is arranged between the first radiator and the cavity to improve the isolation between the first radiator and the cavity; The first radiator has a first end and a second end, and the second radiator has a third end and a fourth end; the first end is connected to the middle frame assembly, a gap is provided between the second end and the middle frame assembly, the third end is connected to the middle frame assembly, and the fourth end is located on a side of the first radiator close to the cavity; wherein the third end is arranged adjacent to the second end; The middle frame assembly includes a first middle plate and a second middle plate that are spaced apart, and the cavity is formed between the first middle plate and the second middle plate; wherein the cavity has a window opening toward the antenna assembly, and the second radiator is disposed between the first radiator and the window.

2. The electronic device according to claim 1, characterized in that: The first radiator and the second radiator are connected to the first middle plate, or the first radiator and the second radiator are connected to the second middle plate.

3. The electronic device according to claim 1, characterized in that: One of the first radiator and the second radiator is connected to the first middle plate, and the other is connected to the second middle plate.

4. The electronic device according to claim 3, characterized in that: The first middle plate and the second middle plate are capable of relative movement so that the middle frame assembly switches between a first posture and a second posture; wherein, in the first posture, the first middle plate and the second middle plate cooperate to form the cavity, and the first radiator is opposite to the window of the cavity; the first radiator and the second radiator are spaced apart in a direction perpendicular to the relative movement direction of the first middle plate and the second middle plate.

5. The electronic device according to claim 4, characterized in that: A sliding stroke of the first middle plate relative to the second middle plate is greater than 1 / 2 of a wavelength corresponding to an operating frequency of the first radiator.

6. The electronic device according to claim 4, characterized in that: The distance between the third end and the fourth end of the second radiator is 3-10 mm.

7. The electronic device according to claim 4, characterized in that: At least one of the first middle plate and the second middle plate is provided with a surrounding wall, and the surrounding wall is provided between the first middle plate and the second middle plate; wherein, the opposite sides of the surrounding wall respectively abut against the first middle plate and the second middle plate, and cooperate with the first middle plate and the second middle plate to form the cavity having the window.

8. The electronic device according to claim 4, characterized in that: The electronic device also includes a first shell and a second shell that are slidably connected, the first shell has a first cavity, and the second shell has a second cavity connected to the first cavity; the first middle plate is accommodated in the first cavity, and the second middle plate is accommodated in the second cavity.

9. The electronic device according to claim 8, characterized in that: A first gap is defined between the first middle plate and the first shell, the first end of the first radiator is connected to the first middle plate, and a portion of the first radiator between the first end and the second end is suspended in the first gap.

10. The electronic device according to claim 8, characterized in that: A second gap is defined between the second middle plate and the second shell, the third end of the second radiator is connected to the second middle plate, and a portion of the second radiator between the third end and the fourth end is suspended in the second gap.

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