Electronic device

Abstract

Disclosed in the present application is an electronic device. The electronic device comprises a first housing, a second housing and a rotating shaft assembly, wherein the first housing and the second housing can be switched between a folded state and an unfolded state. A first magnetic module and a second magnetic module are respectively arranged at the positions of the first housing and the second housing away from the rotating shaft assembly. When the first housing and the second housing are in the folded state, the first magnetic module and the second magnetic module are attracted to each other. The side of the first magnetic module attracted to the second magnetic module has a first magnetic pole and a second magnetic pole which are arranged adjacent to each other and have opposite polarities. The corresponding side of the second magnetic module has a third magnetic pole having a polarity opposite to the polarity of the first magnetic pole and a fourth magnetic pole having a polarity opposite to the polarity of the second magnetic pole, wherein the third magnetic pole and the fourth magnetic pole are arranged adjacent to each other and have opposite polarities. The present application uses the special magnetic pole design to weaken the magnetic attraction effect on foreign matters outside the housings, so as to ensure the safety of display screens, and also ensures reliable device strength, and ensures smooth opening and closing experience for users during use.

Description

electronic devices Technical Field

[0001] The present application relates to the technical field of electronic devices, and more particularly, to a foldable electronic device. Background Art

[0002] To keep a foldable electronic device's housing tightly attached when folded, magnets with sufficient magnetic attraction are typically used, often placed around the edges and / or corners of the device. However, the strong magnetic attraction can easily attract foreign objects such as sand and iron filings from the external environment to the display. When the display is folded, these foreign objects can become trapped between the screens and damage them. Not only can they scratch the display, but they can even penetrate directly into the interior, damaging the electronic device's display.

[0003] Related technologies typically address this issue by thickening the magnets or placing them closer to the center of the display. However, other issues still exist, such as reduced strength of the device housing and poor opening and closing feel.

[0004] Summary of the Invention

[0005] The purpose of the present application is to provide an electronic device, which adopts a special magnetic pole design for the first magnetic module and the second magnetic module to weaken the magnetic attraction effect on foreign objects outside the casing, so as to ensure the safety of the display screen; it can also reduce the space occupied by the magnetic module in the internal space of the casing, ensure the thickness of the base material of the casing, and ensure its reliable strength; it also avoids affecting the suction force at the corners of the electronic device, thereby ensuring the close fit effect of the electronic device in the folded state and the opening and closing feel of the user when in use.

[0006] The present application provides an electronic device, comprising a first housing, a second housing, and a rotating shaft assembly for rotatably connecting the first housing and the second housing, wherein the first housing and the second housing can be switched between a folded state and an unfolded state.

[0007] The first housing and the second housing are respectively provided with a first magnetic module and a second magnetic module at locations away from the rotating shaft assembly. When the first housing and the second housing are in a folded state, the first magnetic module and the second magnetic module are attracted to each other.

[0008] A side where the first magnetic module and the second magnetic module are attracted to each other has a first magnetic pole and a second magnetic pole that are adjacently arranged and have opposite polarities.

[0009] A corresponding side of the second magnetic module has a third magnetic pole with a polarity opposite to the first magnetic pole and a fourth magnetic pole with a polarity opposite to the second magnetic pole. The third magnetic pole and the fourth magnetic pole are adjacently arranged and have opposite polarities.

[0010] The electronic device provided in the present application designs the first magnetic module to have a first magnetic pole and a second magnetic pole that are adjacently arranged and have opposite polarities, and designs the second magnetic module to have a third magnetic pole and a fourth magnetic pole that are adjacently arranged and have opposite polarities, so that the magnetic flux lines of the magnetic circuit formed by the first magnetic module and the second magnetic module are closer or gathered near themselves, so that the magnetic field generated by the magnetic module has a smaller coverage range. When the foldable electronic device is in a flattened state, the magnetic field force of the first magnetic module and the second magnetic module is not likely to affect foreign objects outside the casing, and thus foreign objects are not likely to be attracted to the display screen, thereby ensuring the safety of the display screen.

[0011] The first magnetic module and the second magnetic module in the present application adopt a special magnetic pole design to weaken the magnetic attraction effect on foreign objects outside the casing. This is different from the method of using thickened magnets to guide and adsorb foreign objects to the back side of the casing in the related art. Therefore, the first magnetic module and the second magnetic module in the present application do not need to be additionally thickened, thereby avoiding encroaching on the internal space of the first casing and the second casing, thereby ensuring the base material thickness of the casing, ensuring its strength and the service life of the entire machine; compared with another solution in the related art, the first magnetic module and the second magnetic module do not need to be offset to the middle position of the display screen, thereby avoiding affecting the attraction force at the corners of the electronic device, ensuring the close fit effect of the electronic device when in the folded state, and also ensuring the opening and closing feel of the user when using the electronic device.

[0012] In one possible design, there are multiple first magnetic poles and multiple second magnetic poles, and the multiple first magnetic poles and multiple second magnetic poles are arranged alternately along a specified direction; there are multiple third magnetic poles and multiple fourth magnetic poles, and the multiple third magnetic poles and multiple fourth magnetic poles are arranged alternately along a specified direction.

[0013] The first and second magnetic modules are formed in a straight strip shape, which facilitates their placement around the perimeter of the housing. When the electronic device is folded, the resulting attraction is a linear connection, meaning attraction occurs all around the perimeter of the housing, reducing or even eliminating blind spots. This ensures the user experience is consistent regardless of the location of the housing when unfolding it, enhancing the user experience. Furthermore, a greater number of magnetic poles leads to a more pronounced concentration of magnetic flux lines, resulting in a smaller magnetic field coverage area generated by the magnetic module, making it less likely to affect foreign objects outside the housing and less likely to be attracted to the display.

[0014] In one possible design, there are multiple first magnetic poles and multiple second magnetic poles, and the multiple first magnetic poles and multiple second magnetic poles are arranged in a checkerboard pattern; there are multiple third magnetic poles and multiple fourth magnetic poles, and the multiple third magnetic poles and multiple fourth magnetic poles are arranged in a checkerboard pattern.

[0015] The resulting first and second magnetic modules are block-shaped, creating a compact overall structure that facilitates placement in relatively compact locations, such as corners. Furthermore, a greater number of magnetic poles leads to a more pronounced concentration of magnetic flux lines, resulting in a smaller magnetic field coverage area. This reduces the likelihood of foreign objects being attracted to the display screen, making them less likely to be affected by external objects.

[0016] In a possible design, the first magnetic module includes a first magnetic member, which is a multi-pole magnetized permanent magnet; the second magnetic module includes a second magnetic member, which is a multi-pole magnetized permanent magnet.

[0017] The first magnetic module and the second magnetic module are both composed of a multi-pole magnetized permanent magnet, so that the first magnetic module and the second magnetic module have high integration and can be easily assembled.

[0018] In one possible design, the first magnetic module includes a plurality of third magnetic members, each of which is a unipolar magnetized permanent magnet; the second magnetic module includes a plurality of fourth magnetic members, each of which is a unipolar magnetized permanent magnet.

[0019] The first magnetic module and the second magnetic module are both composed of multiple unipolar magnetized permanent magnets, and existing unipolar magnet products can be directly selected for combination, thus eliminating the need for special customized processing and reducing the manufacturing difficulty and production cost of the first magnetic module and the second magnetic module.

[0020] In a possible design, the plurality of third magnetic members are connected to each other; and the plurality of fourth magnetic members are connected to each other.

[0021] Connecting the plurality of third magnetic members as a whole facilitates assembly of the first magnetic module. Correspondingly, connecting the plurality of fourth magnetic members as a whole also has the same advantages.

[0022] In a possible design, the plurality of third magnetic members are spaced apart from each other; and the plurality of fourth magnetic members are spaced apart from each other.

[0023] In one possible design, the first magnetic module includes a first magnetic member and multiple third magnetic members, the first magnetic member is a multi-pole magnetized permanent magnet, and each third magnetic member is a unipolar magnetized permanent magnet; the second magnetic module includes a second magnetic member and multiple fourth magnetic members, the second magnetic member is a multi-pole magnetized permanent magnet, and each fourth magnetic member is a unipolar magnetized permanent magnet.

[0024] In one possible design, the first housing includes a first middle frame, the first middle frame is provided with a first accommodating slot, and the first magnetic module is arranged in the first accommodating slot; the second housing includes a second middle frame, the second middle frame is provided with a second accommodating slot, and the second magnetic module is arranged in the second accommodating slot.

[0025] The first receiving groove is used to quickly locate the installation position of the first magnetic module on the first middle frame, and the second receiving groove is used to quickly locate the installation position of the second magnetic module on the second middle frame, thereby improving the assembly efficiency of the first magnetic module and the first casing, and the second magnetic module and the second casing.

[0026] In one possible design, there is a gap between the first magnetic module and the side wall of the first accommodating groove, and a non-magnetic first filling piece is arranged in the gap; and / or, there is a gap between the second magnetic module and the side wall of the second accommodating groove, and a non-magnetic second filling piece is arranged in the gap.

[0027] To reduce the difficulty of machining the first receiving slot, a slightly larger first receiving slot can be roughly created, not necessarily completely matching the size of the first magnetic module. This way, after the first magnetic module is placed in the first receiving slot, a gap will exist between the two. Therefore, a first filler is used to fill the slot to prevent the first magnetic module from swaying within the slot. Furthermore, the first filler is made of a non-magnetic material, which prevents the filler from affecting the magnetic flux lines of the first magnetic module, allowing the magnetic flux lines of the first magnetic module to diverge along the designed route and form a magnetic circuit. Accordingly, the second receiving slot also has the advantage of being less difficult to create.

[0028] In one possible design, a first magnetic conductive sheet is provided on the side of the bottom wall of the first receiving groove of the first magnetic module; and / or a second magnetic conductive sheet is provided on the side of the bottom wall of the second receiving groove of the second magnetic module.

[0029] The magnetic conductive sheet can further constrain or gather the magnetic flux lines of the magnetic module near itself, thereby preventing the magnetic module from attracting foreign objects outside the casing.

[0030] In one possible design, the edge of the first magnetic conductive sheet has a first limiting portion formed by bending, there is a gap between the first magnetic module and the side wall of the first accommodating groove, and the first limiting portion is arranged in the gap; and / or, the edge of the second magnetic conductive sheet has a second limiting portion formed by bending, there is a gap between the second magnetic module and the side wall of the second accommodating groove, and the second limiting portion is arranged in the gap.

[0031] The limiting portion is used to prevent the magnetic module from shaking in the accommodating groove.

[0032] In one possible design, a first gap for inserting external tools is formed between the first magnetic module and the side wall of the first accommodating groove; and / or a second gap for inserting external tools is formed between the second magnetic module and the side wall of the second accommodating groove.

[0033] In order to facilitate the removal of the magnetic module, a notch is provided on the magnetic module, so that a tool such as a pry bar can be conveniently inserted into the bottom of the magnetic module to pry the magnetic module out of the receiving slot.

[0034] In one possible design, the first accommodating groove includes a first sub-groove, a second sub-groove and a third sub-groove, and the first sub-groove, the second sub-groove and the third sub-groove are all provided with a first magnetic module; the first sub-groove is located at a corner of the first middle frame away from the rotating shaft assembly, and the second sub-groove and the third sub-groove are located at another corner of the first middle frame away from the rotating shaft assembly; the second accommodating groove includes a fourth sub-groove, a fifth sub-groove and a sixth sub-groove, and the fourth sub-groove, the fifth sub-groove and the sixth sub-groove are all provided with a second magnetic module; the fourth sub-groove is located at a corner of the second middle frame away from the rotating shaft assembly, and the fifth sub-groove and the sixth sub-groove are located at another corner of the second middle frame away from the rotating shaft assembly.

[0035] The positions of the first accommodating groove and the second accommodating groove are further limited, so that the first magnetic module and the second magnetic module in the groove are located at the corner of the middle frame, and the first housing and the second housing can be attracted at the corner. In this way, a more uniform opening and closing feel can be achieved with a smaller number of magnetic modules, and reducing the number of magnetic modules is conducive to the design and installation of some magnetic sensitive devices. The specific reason is that foldable mobile phones generally have devices such as compasses, Hall devices, magnetoresistive devices, speaker modules, etc. that are very sensitive to magnetic field strength. If the layout of such magnetic sensitive devices and the magnetic modules used to attract foldable mobile phones is unreasonable, the magnetic sensitive devices will be easily disturbed by the magnetic field generated by the magnetic modules, thereby causing problems such as functional failure or poor working accuracy of the magnetic sensitive devices. The magnetic modules arranged at the corners can avoid most areas on the housing, thereby providing more sufficient design and installation positions for these magnetic sensitive devices.

[0036] In a possible design, the opening areas of the second sub-groove and the third sub-groove are both smaller than the opening area of ​​the first sub-groove; and the opening areas of the fifth sub-groove and the sixth sub-groove are both smaller than the opening area of ​​the fourth sub-groove.

[0037] A sub-groove with a larger opening area is provided at one corner, and two sub-grooves with smaller opening areas are provided at the other corner, thereby facilitating structural optimization.

[0038] In one possible design, the first magnetic module in the first sub-slot has two first magnetic poles and two second magnetic poles, and the two first magnetic poles and the two second magnetic poles are arranged in a checkerboard pattern; the second magnetic module in the fourth sub-slot has two third magnetic poles and two fourth magnetic poles, and the two third magnetic poles and the two fourth magnetic poles are arranged in a checkerboard pattern.

[0039] In a possible design, the groove sidewalls of the first sub-groove and the second sub-groove both have rounded chamfers; the groove sidewalls of the fourth sub-groove and the fifth sub-groove also have rounded chamfers.

[0040] The rounded chamfers on the side walls of the groove can disperse stress, thereby avoiding stress concentration at the grooves on the housing, thereby improving the strength of the housing and being able to withstand greater impact force when it falls.

[0041] In one possible design, the first accommodating groove is a strip-shaped groove and is located at the periphery of the first housing away from the rotating shaft assembly; the first magnetic module in the first accommodating groove has multiple first magnetic poles and multiple second magnetic poles, and the multiple first magnetic poles and multiple second magnetic poles are arranged alternately along a specified direction; the second accommodating groove is a strip-shaped groove and is located at the periphery of the second housing away from the rotating shaft assembly; the second magnetic module in the second accommodating groove has multiple third magnetic poles and multiple fourth magnetic poles, and the multiple third magnetic poles and multiple fourth magnetic poles are arranged alternately along a specified direction.

[0042] The structure and position of the receiving slot are further limited so that the magnetic module in the slot is arranged around the casing, so that when the user unfolds the casing, the opening and closing feel felt at any point is the same, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] FIG1 is a schematic diagram of a first solution in the related art;

[0044] FIG2 is a schematic diagram of a second solution in the related art;

[0045] FIG3 is a schematic diagram of a foldable mobile phone provided in an embodiment of the present application in a flattened state;

[0046] FIG4 is a schematic diagram of a foldable mobile phone provided in an embodiment of the present application in a folded state;

[0047] FIG5 is a schematic diagram of the first magnetic module hidden behind the first housing and the second magnetic module hidden behind the second housing in FIG4 ;

[0048] FIG6 is a schematic diagram of the magnetic flux distribution of a magnet in the related art;

[0049] FIG7 is a schematic diagram of the distribution of magnetic flux lines when two magnets are close to each other in the related art;

[0050] FIG8 is a schematic diagram of the magnetic flux distribution of the first magnetic module in FIG5;

[0051] 9 is a schematic diagram of the distribution of magnetic flux lines when the first magnetic module and the second magnetic module are close to each other according to an embodiment of the present application;

[0052] FIG10 is a schematic diagram of a first example of a first magnetic module and a second magnetic module provided in an embodiment of the present application;

[0053] FIG11 is a schematic diagram of a second example of a first magnetic module and a second magnetic module provided in an embodiment of the present application;

[0054] FIG12 is a schematic diagram of a third example of the first magnetic module and the second magnetic module provided in an embodiment of the present application.

[0055] 13 is a schematic diagram of a fourth example of a first magnetic module and a second magnetic module provided in an embodiment of the present application;

[0056] 14 is a schematic diagram of a fifth example of a first magnetic module and a second magnetic module provided in an embodiment of the present application;

[0057] FIG15 is a schematic diagram of the magnetic flux distribution of the first magnetic module in FIG14;

[0058] FIG16 is a schematic diagram of the distribution of magnetic flux lines when the first magnetic module and the second magnetic module in FIG14 are close to each other;

[0059] 17 is a schematic diagram of a sixth example of a first magnetic module and a second magnetic module provided in an embodiment of the present application;

[0060] FIG18 is a schematic diagram of a seventh example of a first magnetic module and a second magnetic module provided in an embodiment of the present application;

[0061] FIG19 is a schematic diagram of an eighth example of a first magnetic module and a second magnetic module provided in an embodiment of the present application;

[0062] FIG20 is a schematic diagram of the magnetic flux distribution of the third magnetic member in FIG19;

[0063] FIG21 is a schematic diagram of the distribution of magnetic flux lines when the third magnetic member and the fourth magnetic member in FIG19 are close to each other;

[0064] FIG22 is a schematic diagram of a first example of a first middle frame and a second middle frame provided in an embodiment of the present application;

[0065] FIG23 is a schematic diagram of a first magnetic module, a first filler, and a first magnetic conductive sheet provided in an embodiment of the present application;

[0066] FIG24 is a schematic diagram of a second magnetic module and a second magnetic conductive sheet provided in an embodiment of the present application;

[0067] FIG25 is a schematic diagram of a second example of the first middle frame and the second middle frame provided in an embodiment of the present application;

[0068] FIG26 is a schematic diagram of the magnetic modules in the first sub-slot, the second sub-slot, the third sub-slot, the fourth sub-slot, the fifth sub-slot, and the sixth sub-slot in FIG25;

[0069] FIG27 is a schematic diagram of a ninth example of the first magnetic module and the second magnetic module provided in an embodiment of the present application;

[0070] FIG28 is a schematic diagram of a tenth example of a first magnetic module and a second magnetic module provided in an embodiment of the present application;

[0071] FIG29 is a schematic diagram of a third example of the first middle frame and the second middle frame provided in an embodiment of the present application;

[0072] FIG30 is a schematic diagram of the magnetic modules in the first accommodating groove and the second accommodating groove in FIG29.

[0073] Figures: 10, first housing; 11, first middle frame; 12, first receiving slot; 121, first sub-slot; 122, second sub-slot; 123, third sub-slot; 13, first filling member; 14, first magnetic conductive sheet; 141, first position-limiting portion; 20, second housing; 21, second middle frame; 22, second receiving slot; 221, fourth sub-slot; 222, fifth sub-slot; 223, sixth sub-slot; 23, second magnetic conductive sheet; 231, second position-limiting portion; 30, rotating shaft assembly; 40, first magnetic module; 401, first magnetic pole; 402, second magnetic pole; 41, first magnetic member; 42, third magnetic member; 43, first notch; 50, second magnetic module; 501, third magnetic pole; 502, fourth magnetic pole; 51, second magnetic member; 52, fourth magnetic member; 60. Display screen; 70. Magnet; 71. Foreign matter; 80. Device casing. DETAILED DESCRIPTION

[0074] The following is an illustrative introduction to the relevant contents that may be involved in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments.

[0075] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or mutual communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0076] In the description of this application, it should be understood that the terms "upper", "lower", "side", "inside", "outside", "top", "bottom", etc. indicate orientations or positional relationships based on the installation, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0077] It should also be noted that, in the embodiments of the present application, the same reference numerals are used to represent the same component or the same part. For the same parts in the embodiments of the present application, the figure may only mark one of the parts or parts as an example. It should be understood that the reference numerals are also applicable to other identical parts or parts.

[0078] In the description of this application, it should be noted that the term "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone.

[0079] Flexible screens, with their bendable properties, are currently being used in foldable electronic devices such as mobile phones, tablets, wristbands, game consoles, and wearable devices. The displays of these electronic devices can be increased in size without increasing the size, while also maintaining a high screen-to-body ratio and high clarity. For example, a foldable phone, for example, can be folded to the size of a traditional phone, making it easy to carry and store. When unfolded, it can have the display size of a tablet, providing a larger display area and enhancing the user's viewing and operating experience. These features have made foldable electronic devices very popular with consumers.

[0080] Flexible screens have a unique stacking structure, resulting in a relatively high overall stiffness (ability to resist bending). This creates a rebound force that can push the device flat after folding. To counteract this rebound force, foldable electronic devices require magnets to ensure a tight connection when folded.

[0081] To ensure a tight fit when folded, the magnets used in foldable electronic devices must meet certain magnetic attraction requirements, and are typically placed around the perimeter and / or corners of the device. Excessive magnetic attraction can easily attract small foreign objects such as gravel and iron filings from the external environment onto the display screen, making them difficult for the user to detect. When the display screen is closed, these trapped foreign objects can exert a powerful destructive force, not only scratching the screen but potentially penetrating directly into it, ultimately damaging the display screen.

[0082] Currently, the following two solutions are commonly used in related art to address the problem of foreign matter 71 being easily attracted to the display screen 60 of a foldable electronic device. These solutions are described in detail below with reference to the accompanying figures. Figure 1 is a schematic diagram of solution one in related art. Figure 2 is a schematic diagram of solution two in related art.

[0083] Solution 1, as shown in FIG1 , thickens magnet 70 so that its magnetic attraction can penetrate device housing 80 and exert its effect, thereby guiding foreign matter 71 to the back side of device housing 80, indicated by point A in FIG1 , thereby reducing the probability of foreign matter 71 being attracted to display screen 60. However, excessively thick magnet 70 will occupy the internal space of device housing 80, thereby reducing the thickness of the substrate of device housing 80 at that location, resulting in a decrease in strength. In particular, when magnet 70 is placed at the corner of display screen 60, this location is easily damaged during a device drop test, resulting in poor device reliability.

[0084] Solution 2, as shown in FIG2 , does not change the thickness of the magnet 70, but simply shifts the position of the magnet 70 toward the middle of the display screen 60, thereby creating a certain safety distance between the magnet 70 and the edge of the device housing 80. This reduces the magnetic attraction of the magnet 70 to the foreign object 71 at the edge of the device housing 80, making it difficult for the magnet 70 to attract the foreign object 71 to the display screen 60. However, the magnet 70 is too far away from the edge of the device housing 80, which results in a weaker attraction at the corners of the electronic device when it is folded, i.e., at the position indicated by B in FIG2 . The adhesion effect at this position is poor, making the user feel soft when unfolding the electronic device, thereby affecting the user's experience when opening and closing the electronic device.

[0085] It can be seen that although the above two solutions can specifically solve the problem of the display screen 60 of the foldable electronic device easily attracting foreign objects 71, they will also cause other problems such as reduced strength of the device casing 80 and poor opening and closing feel, and cannot achieve the optimal solution that can balance other needs.

[0086] In view of this, in order to solve the above-mentioned technical problems, the present application provides an electronic device, which weakens the magnetic attraction effect on foreign objects 71 outside the casing by adopting a special magnetic pole design for the first magnetic module 40 and the second magnetic module 50, so as to ensure the safety of the display screen 60; it can also reduce the space occupied by the magnetic module in the internal space of the casing, ensure the thickness of the base material of the casing, and ensure its reliable strength; it also avoids affecting the suction force at the corners of the electronic device, ensuring the close fit effect of the electronic device in the folded state and the opening and closing feel of the user when using it.

[0087] An embodiment of the present application provides an electronic device, which may also be referred to as a mobile device, a terminal device, a mobile terminal, or a terminal. The electronic device includes but is not limited to a handheld device, an in-vehicle device, a wearable device, a computing device, or other processing device connected to a wireless modem. For example, the electronic device may be a foldable mobile phone, a foldable tablet computer, a foldable game handheld, a foldable e-reader, a foldable wearable device, etc., and may also be other electronic devices with a foldable function that require a design to prevent foreign matter 71 from being attracted.

[0088] In order to more conveniently explain the electronic device provided in the embodiment of the present application, as an example rather than a limitation, the following will take the electronic device being a foldable mobile phone as an example to explain in detail the technical solution of the present application.

[0089] The foldable mobile phone provided in the embodiments of the present application will now be described in detail with reference to the accompanying drawings.

[0090] Figure 3 is a schematic diagram of a foldable mobile phone provided in an embodiment of the present application in a flattened state. Figure 4 is a schematic diagram of a foldable mobile phone provided in an embodiment of the present application in a folded state.

[0091] As shown in Figures 3 and 4, an embodiment of the present application provides a foldable mobile phone, which includes a first housing 10, a second housing 20, a hinge assembly 30, and a display screen 60. The first housing 10 and the second housing 20 are arranged side by side, and the hinge assembly 30 is connected between the first housing 10 and the second housing 20 to rotate the first housing 10 and the second housing 20, so that the first housing 10 and the second housing 20 can switch between a folded state and a flattened state. The display screen 60 is arranged above the first housing 10, the hinge assembly 30, and the second housing 20.

[0092] The first and second housings 10 and 20 support the display screen 60 and protect the foldable phone's internal components. The display screen 60 is fixedly connected to the first and second housings 10 and 20 at both ends. The first and second housings 10 and 20 can be rigid shells, providing a secure support for both ends of the display screen 60.

[0093] The hinge assembly 30 deforms as the second housing 20 is folded or unfolded relative to the first housing 10, and prevents the second housing 20 from separating from the first housing 10. Specifically, the two opposing sides of the hinge assembly 30 are connected to the first housing 10 and the second housing 20, respectively. The hinge assembly 30 utilizes its rotatable nature to allow the first housing 10 to flip relative to the second housing 20, allowing the first housing 10 to be folded relative to the second housing 20, flattened, or in between.

[0094] The first housing 10 and the second housing 20 can be folded or flattened relative to each other, allowing the foldable phone provided in the present embodiment to have multiple modes, meeting the user's needs in different scenarios. For example, the first housing 10 and the second housing 20 can be folded relative to each other so that the display screen 60 can fit together, allowing the foldable phone to switch to a closed mode. In this case, the foldable phone has a smaller size, making it easier for the user to store and carry it.

[0095] The first housing 10 and the second housing 20 are respectively provided with a first magnetic module 40 and a second magnetic module 50 at locations away from the hinge assembly 30. When the first housing 10 and the second housing 20 are in a folded state, the first magnetic module 40 and the second magnetic module 50 are attracted to each other, thereby preventing the first housing 10 and the second housing 20 from accidentally opening, ensuring that the foldable phone remains closed during storage and carrying.

[0096] The first housing 10 and the second housing 20 can be in a state between folded and flat, for example, forming an angle of 90 to 120 degrees between them, so that the foldable phone can be switched to a desktop usage mode. In this mode, the first housing 10 and the display 60 thereon can face the user, and the second housing 20 can be placed on a storage table, desk, or other storage surface. The second housing 20 acts like a counterweight base, ensuring the stability of the foldable phone.

[0097] The first housing 10 and the second housing 20 can also be relatively flat, for example, forming an angle of 180 degrees between the two, which can achieve large-screen display, provide users with richer information, and bring users a better user experience.

[0098] It can be understood that when the user holds a foldable phone, the location of the earpiece module of the foldable phone can be defined as the top of the foldable phone, the location of the microphone module of the foldable phone can be defined as the bottom of the foldable phone, and the two sides of the foldable phone held by the user's left and right hands can be defined as the left and right sides of the foldable phone.

[0099] In some embodiments provided in the present application, the first housing 10 and the second housing 20 are arranged up and down, so that the foldable mobile phone can be folded in half up and down.

[0100] In some other embodiments provided in the present application, the first housing 10 and the second housing 20 are arranged left and right, so that the foldable mobile phone can be folded left and right, for example, as shown in FIG. 4 .

[0101] Optionally, the hinge assembly 30 is also used to support the display screen 60 to prevent the display screen 60 from collapsing. Specifically, the hinge assembly 30 is provided with a display screen 60 support assembly, which can rise to support the display screen 60 as the hinge assembly 30 is flattened, and can also fall to make room for the display screen 60 as the hinge assembly 30 is folded.

[0102] Optionally, the display screen 60 may be a flexible screen that is foldable as a whole, or the display screen 60 may be a combination of a foldable flexible screen in the middle area and rigid screens at both ends, which is not limited in this application.

[0103] Optionally, the foldable phone may further include multiple modules, which may be housed within the first housing 10 and the second housing 20. The multiple modules of the foldable phone may include, but are not limited to, a motherboard, a processor, a memory, a battery, a camera module, an earpiece module, a speaker module, a microphone module, an antenna module, a sensor module, etc. This application does not specifically limit the number, type, or location of the modules of the foldable phone.

[0104] Optionally, in the foldable mobile phone provided in the embodiment of the present application, the foldable mobile phone is taken as an example of a two-fold structure, that is, the foldable mobile phone includes two housing parts (a first housing 10 and a second housing 20) and a hinge assembly 30 connected between the two housing parts; the two housing parts can be rotated toward each other in a manner that the display screens 60 are in contact with each other to be stacked on each other, so that the foldable mobile phone presents a two-layer form, that is, as shown in Figure 4, in this case, the foldable mobile phone is an inward-folding folding mobile phone; the two housing parts can also be rotated away from each other to be stacked on each other, so that the foldable mobile phone presents a two-layer form, that is, in this case, the foldable mobile phone is an outward-folding folding mobile phone.

[0105] Alternatively, in other embodiments of the present application, the foldable phone may have a structure that folds three or more times, i.e., the foldable phone includes three or more housing sections, with adjacent housing sections connected by a hinge assembly 30. The adjacent housing sections can rotate relative to each other to overlap or rotate away from each other to flatten. When the foldable phone has a structure that folds three or more times, the magnetic module structure used in the foldable phone can be adaptively designed with reference to the description of the two-fold structure in this embodiment, and this application will not elaborate on this further.

[0106] To facilitate the description of the following embodiments, an XYZ coordinate system is established for the foldable phone. Specifically, the extension direction of the foldable phone's rotation axis is defined as the Y direction, the thickness direction of the foldable phone is defined as the Z direction, and the direction perpendicular to both the Y and Z directions is defined as the X direction.

[0107] The following is a detailed introduction to the technical solution of the magnetic module used in the foldable mobile phone in the embodiment of the present application.

[0108] FIG. 5 is a schematic diagram of the first magnetic module 40 with the first housing 10 hidden and the second magnetic module 50 with the second housing 20 hidden in FIG. 4 .

[0109] As shown in FIG5 , the side where the first magnetic module 40 and the second magnetic module 50 are attracted to each other has a first magnetic pole 401 and a second magnetic pole 402 adjacently arranged and having opposite polarities. For example, the first magnetic pole 401 is an S pole and the second magnetic pole 402 is an N pole.

[0110] The corresponding side of the second magnetic module 50, that is, the side where the second magnetic module 50 is attracted to the first magnetic module 40, has a third magnetic pole 501 with a polarity opposite to that of the first magnetic pole 401, and also has a fourth magnetic pole 502 with a polarity opposite to that of the second magnetic pole 402. The third magnetic pole 501 and the fourth magnetic pole 502 are arranged adjacent to each other and have opposite polarities. For example, the third magnetic pole 501 is the N pole and the fourth magnetic pole 502 is the S pole.

[0111] The magnetic module is designed in this way, so that when the foldable mobile phone provided in the embodiment of the present application is in a flattened state, it is not easy to attract foreign objects 71 to the display screen 60, thereby ensuring the safety of the display screen 60; when the foldable mobile phone is in a folded state, the magnetic attraction between the casings is strong, and the user's opening and closing feel is better; in addition, it can also reduce the space occupied by the magnetic module in the internal space of the casing, and can ensure the thickness of the base material of the casing and ensure its reliable strength.

[0112] In order to easily understand the above advantages, the following will introduce them in detail with reference to the principle diagram.

[0113] Figure 6 is a schematic diagram of the magnetic flux distribution of a magnet 70 in the related art. Figure 7 is a schematic diagram of the magnetic flux distribution when two magnets 70 are close to each other in the related art.

[0114] In the related art, when the foldable mobile phone is in a flattened state, the two device casings 80 are not attached together. Taking the magnet 70 of one of the device casings 80 as an example, as shown in Figure 6, outside the magnet 70, the magnetic flux lines point from the N pole to the S pole to form the magnetic circuit of the magnet 70 itself, and the magnetic flux lines of the magnet 70 are distributed over a wide range, and the coverage range of the magnetic field force is large. Therefore, the magnet 70 has a large magnetic attraction for foreign objects 71 outside the device casing 80, making it easy for the foreign objects 71 to be attracted to the display screen 60.

[0115] When the foldable mobile phone is in the folded state, the two device housings 80 are attached to each other, as shown in FIG7 . At this time, the two magnets 70 are attracted to each other, and a magnetic circuit is formed between the two magnets 70 .

[0116] FIG8 is a schematic diagram of the magnetic flux distribution of the first magnetic module 40 provided in an embodiment of the present application.

[0117] When the foldable mobile phone is in a flattened state, as shown in Figure 8, outside the first magnetic module 40, the approximate distribution of the magnetic flux lines is as follows: the magnetic flux lines point from the second magnetic pole 402 (N pole) to the adjacent first magnetic pole 401 (S pole) to constitute a part of the magnetic circuit of the first magnetic module 40 itself; on the side facing away from the first magnetic pole 401 and the second magnetic pole 402, the magnetic flux lines point from the N pole to the adjacent S pole to constitute a part of the magnetic circuit; the magnetic flux lines point from the second magnetic pole 402 to the S pole facing away from the second magnetic pole 402 to constitute a part of the magnetic circuit; the magnetic flux lines point from the N pole facing away from the first magnetic pole 401 to the first magnetic pole 401 to constitute a part of the magnetic circuit.

[0118] As can be seen from FIG8 , magnetic flux lines preferentially select the nearest opposite pole to form a magnetic loop. Specifically, a magnetic loop is formed between the adjacent first magnetic pole 401 and the second magnetic pole 402 of opposite polarity on the first magnetic module 40. A magnetic loop is also formed nearby on the side of the first magnetic module 40 facing away from the first and second magnetic poles 401, 402. This results in the magnetic flux lines of the first magnetic module 40 forming the magnetic loop being closer together or clustered near itself. Compared to the distribution of magnetic flux lines generated by the magnet 70 of the related art in FIG6 , the distribution range of the magnetic flux lines of the first magnetic module 40 is smaller, and the coverage range of the magnetic field force is also smaller. Therefore, the magnetic field generated by the first magnetic module 40 is less likely to cover the foreign object 71 outside the first housing 10, making it less likely that the foreign object 71 will be attracted to the display screen 60.

[0119] Outside the second magnetic module 50 , the distribution of the magnetic flux lines is similar to that of the first magnetic module 40 , and the magnetic flux lines constituting the magnetic circuit are also brought closer to or gathered near the second magnetic module 50 itself, which will not be repeated here.

[0120] FIG. 9 is a schematic diagram showing the distribution of magnetic flux lines when the first magnetic module 40 and the second magnetic module 50 in FIG. 5 are close to each other.

[0121] When the foldable mobile phone is in the folded state, the first housing 10 and the second housing 20 are attached to each other, as shown in Figure 9. At this time, the first magnetic module 40 and the second magnetic module 50 are attracted to each other, and the distribution of magnetic flux lines between the first magnetic module 40 and the second magnetic module 50 is as follows: the third magnetic pole 501 (N pole) points to the opposite first magnetic pole 401 (S pole) to form a magnetic circuit, and the second magnetic pole 402 (N pole) points to the opposite fourth magnetic pole 502 (S) to form a magnetic circuit, so that the first magnetic module 40 and the second magnetic module 50 remain attracted.

[0122] As can be seen from Figure 9, when the first magnetic module 40 and the second magnetic module 50 are attracted to each other, the first magnetic module 40 and the second magnetic module 50 can form a magnetic circuit. Compared with the distribution of magnetic flux lines generated by the two magnets 70 of the related technology in Figure 7, the distribution of magnetic flux lines between the first magnetic module 40 and the second magnetic module 50 is similar, except that the direction is different. Compared with the method of two magnets 70, they have roughly the same attraction force, which can prevent the first housing 10 and the second housing 20 from opening accidentally, ensuring that the foldable mobile phone remains closed during storage and carrying.

[0123] In summary, the foldable mobile phone provided in the embodiment of the present application designs the first magnetic module 40 to have a first magnetic pole 401 and a second magnetic pole 402 that are adjacently arranged and have opposite polarities, and designs the second magnetic module 50 to have a third magnetic pole 501 and a fourth magnetic pole 502 that are adjacently arranged and have opposite polarities, so that the magnetic flux lines of the magnetic circuit formed by the first magnetic module 40 and the second magnetic module 50 are closer or gathered near themselves, so that the magnetic field coverage range generated by the magnetic module is smaller. When the foldable mobile phone is in a flattened state, the magnetic field force of the first magnetic module 40 and the second magnetic module 50 is not likely to affect the foreign matter 71 outside the casing, and thus the foreign matter 71 is not likely to be attracted to the display screen 60, thereby ensuring the safety of the display screen 60. The first magnetic module 40 and the second magnetic module 50 adopt special The special magnetic pole design weakens the magnetic attraction effect on foreign objects 71 outside the casing, which is different from the method of using thickened magnets 70 in the related art to guide and adsorb foreign objects 71 to the back side of the casing. Therefore, the first magnetic module 40 and the second magnetic module 50 in the embodiment of the present application do not need to be additionally thickened, thereby avoiding encroaching on the internal space of the first casing 10 and the second casing 20, thereby ensuring the base material thickness of the casing, ensuring its strength and the service life of the entire machine; compared with the method of solution 2 in the related art, the first magnetic module 40 and the second magnetic module 50 do not need to be offset to the middle position of the display screen 60, thereby avoiding affecting the suction force at the corners of the mobile phone, ensuring the close fit effect of the mobile phone when it is folded, and also ensuring the opening and closing feel of the user when using the mobile phone.

[0124] As mentioned above, the first and second magnetic modules 40 and 50 in the present embodiment are able to weaken the magnetic attraction to foreign objects 71 outside the housing by employing a special magnetic pole design. This special magnetic pole design can be achieved in two ways: one is to use a multi-pole permanent magnet, and the other is to use multiple single-pole permanent magnets. This will be described in detail below.

[0125] Among them, the permanent magnet materials used in the embodiments of the present application can be: neodymium iron boron (NdFeB), which is divided into sintered NdFeB and bonded NdFeB; samarium cobalt (SmCo), SmCo magnets are resistant to high temperatures and corrosion; aluminum nickel cobalt (AlNiCo), aluminum nickel cobalt magnets have low coercive force and are suitable for high temperature applications; ferrite, ferrite materials are cheap and easy to process.

[0126] Optionally, in addition to realizing special magnetic pole designs through the above two methods, the first magnetic module 40 and the second magnetic module 50 may also form a special multi-pole effect by combining multiple electromagnets.

[0127] First, the multi-pole magnetization of the permanent magnet is introduced to achieve the multi-pole effect in the embodiment of the present application.

[0128] FIG10 is a schematic diagram of a first example of a first magnetic module 40 and a second magnetic module 50 provided in an embodiment of the present application.

[0129] As shown in FIG10 , in one embodiment provided in the present application, the first magnetic module 40 includes a first magnetic member 41 , which is a multi-pole magnetized permanent magnet. The second magnetic module 50 includes a second magnetic member 51 , which is a multi-pole magnetized permanent magnet.

[0130] Multi-pole magnetization is performed using a customized magnetization fixture. After magnetization, two or more pairs of north and south poles appear on the same magnet, meaning one surface has two or more magnetic poles. For example, as shown in Figure 10, a first magnetic member 41 has two pairs of oppositely polarized magnetic poles. The bottom of the first magnetic member 41 has two magnetic poles, namely, a first magnetic pole 401 (south pole) and a second magnetic pole 402 (north pole). Conversely, the top of the first magnetic member 41 has both north and south poles.

[0131] Similarly, two pairs of magnetic poles with opposite polarities are magnetized on a second magnetic member 51, wherein the top of the second magnetic member 51 has two magnetic poles, namely the third magnetic pole 501 (N pole) and the fourth magnetic pole 502 (S pole), and in contrast, the bottom of the second magnetic member 51 has an S pole and a N pole.

[0132] The following describes how to achieve a multi-pole effect in the embodiment of the present application by using multiple unipolar magnetized permanent magnets.

[0133] FIG11 is a schematic diagram of a second example of the first magnetic module 40 and the second magnetic module 50 provided in an embodiment of the present application.

[0134] As shown in FIG11 , in one embodiment provided herein, the first magnetic module 40 includes a plurality of third magnetic members 42 , each of which is a unipolar magnetized permanent magnet. The second magnetic module 50 includes a plurality of fourth magnetic members 52 , each of which is a unipolar magnetized permanent magnet.

[0135] Unipolar magnetization involves magnetizing magnetic materials using existing magnetizers and fixtures. After magnetization, the magnet exhibits both north and south poles, meaning each side has only one magnetic pole. For example, as shown in Figure 11, the first magnetic module 40 is composed of two third magnetic members 42. Each third magnetic member 42 is magnetized with a pair of oppositely polarized magnetic poles. The bottoms of the two third magnetic members 42 are each provided with a first magnetic pole 401 (south pole) and a second magnetic pole 402 (north pole).

[0136] Similarly, the second magnetic module 50 is composed of two fourth magnetic members 52. A pair of magnetic poles with opposite polarities are magnetized on each fourth magnetic member 52. The tops of the two fourth magnetic members 52 respectively have a third magnetic pole 501 (N pole) and a fourth magnetic pole 502 (S pole).

[0137] In a multi-pole magnet or multi-pole magnet group, magnetic flux lines preferentially form a magnetic loop with the nearest opposite pole, causing the magnetic flux lines to be closer or clustered near the magnet or multi-pole magnet group. This clustering effect becomes more pronounced with the number of poles. To further cluster the magnetic flux lines and thereby reduce the magnetic attraction to foreign matter 71, the present application further improves the first magnetic module 40 and the second magnetic module 50.

[0138] FIG12 is a schematic diagram of a third example of the first magnetic module 40 and the second magnetic module 50 provided in an embodiment of the present application.

[0139] As shown in FIG12 , in one embodiment provided herein, there are multiple first magnetic poles 401 and multiple second magnetic poles 402, and the multiple first magnetic poles 401 and multiple second magnetic poles 402 are alternately arranged along a specified direction. There are multiple third magnetic poles 501 and multiple fourth magnetic poles 502, and the multiple third magnetic poles 501 and multiple fourth magnetic poles 502 are alternately arranged along a specified direction.

[0140] In this embodiment, the first magnetic module 40 has multiple first magnetic poles 401 and multiple second magnetic poles 402, and the second magnetic module 50 has multiple third magnetic poles 501 and multiple fourth magnetic poles 502, which not only makes the magnetic lines of force closer or gather near themselves, thereby further weakening the magnetic attraction effect on foreign objects 71 outside the casing; at the same time, the first magnetic pole 401 and the second magnetic pole 402, the third magnetic pole 501 and the fourth magnetic pole 502 are all arranged alternately along the specified direction, so the first magnetic module 40 and the second magnetic module 50 formed are in the shape of straight bars, which is conducive to arranging the first magnetic module 40 and the second magnetic module 50 around the periphery of the casing. The attraction effect formed after the mobile phone is folded is a linear attraction connection, that is, there can be attraction all around the periphery of the casing, which can reduce or even eliminate the attraction blind spot. Since the opening and closing feel of the blind area is softer than that of the engagement area, this embodiment can reduce or even eliminate the blind area, so that when the user unfolds the casing, the opening and closing feel felt at any point is the same, thereby improving the user experience.

[0141] As shown in FIG. 12 , in one embodiment provided herein, a first magnetic module 40 is comprised of a first magnetic member 41 , the bottom of which has a plurality of first magnetic poles 401 and a plurality of second magnetic poles 402 , which are arranged alternately along the Y direction. A second magnetic module 50 is comprised of a second magnetic member 51 , the top of which has a plurality of third magnetic poles 501 and a plurality of fourth magnetic poles 502 , which are arranged alternately along the Y direction.

[0142] FIG13 is a schematic diagram of a fourth example of the first magnetic module 40 and the second magnetic module 50 provided in an embodiment of the present application.

[0143] As shown in FIG13 , in one embodiment provided herein, the first magnetic module 40 is composed of a plurality of third magnetic members 42 , which are arranged along the Y direction, and the magnetic poles of two adjacent third magnetic members 42 are opposite, so as to form a pattern in which a plurality of first magnetic poles 401 and a plurality of second magnetic poles 402 are alternately arranged along the Y direction. The second magnetic module 50 is composed of a plurality of fourth magnetic members 52 , which are arranged along the Y direction, and the magnetic poles of two adjacent fourth magnetic members 52 are opposite, so as to form a pattern in which a plurality of third magnetic poles 501 and a plurality of fourth magnetic poles 502 are alternately arranged along the Y direction.

[0144] A magnetic structure composed of multiple unipolar magnetized permanent magnets is also called a Halbach array. As shown in FIG13 , the first magnetic module 40 is a Halbach array composed of seven unipolar magnetized permanent magnets (third magnetic element 42 ), and the second magnetic module 50 is a Halbach array composed of seven unipolar magnetized permanent magnets (fourth magnetic element 52 ).

[0145] FIG14 is a schematic diagram of a fifth example of the first magnetic module 40 and the second magnetic module 50 provided in an embodiment of the present application.

[0146] As shown in FIG14 , in one embodiment provided by the present application, the first magnetic module 40 is composed of three unipolar magnetized permanent magnets (third magnetic component 42 ) forming a Halbach magnet array, and the second magnetic module 50 is composed of three unipolar magnetized permanent magnets (fourth magnetic component 52 ) forming a Halbach magnet array.

[0147] FIG. 15 is a schematic diagram showing the distribution of magnetic flux lines of the first magnetic module 40 in FIG. 14 .

[0148] When the foldable mobile phone is in a flattened state, as shown in Figure 15, outside the first magnetic module 40, the approximate distribution of the magnetic flux lines is as follows: the magnetic flux lines point from the second magnetic pole 402 (N pole) to the two adjacent first magnetic poles 401 (S poles) to form a part of the magnetic circuit of the first magnetic module 40 itself; on the side facing away from the first magnetic pole 401 and the second magnetic pole 402, the magnetic flux lines point from the two N poles to the middle S pole to form a part of the magnetic circuit; the two N poles facing away from the first magnetic pole 401 point to the two first magnetic poles 401 to form a part of the magnetic circuit.

[0149] Comparing Figure 15 with Figure 8 , it can be seen that as the number of magnetic poles in the first magnetic module 40 increases, the distribution range of the magnetic flux lines of the first magnetic module 40 decreases, and the coverage area of ​​the magnetic field force also decreases. Therefore, the magnetic field generated by the first magnetic module 40 is less likely to reach foreign objects 71 outside the first housing 10, making it less likely that foreign objects 71 will be attracted to the display screen 60.

[0150] Outside the second magnetic module 50 , the distribution of the magnetic flux lines is similar to that of the first magnetic module 40 , and the magnetic flux lines constituting the magnetic circuit are also brought closer to or gathered near the second magnetic module 50 itself, which will not be repeated here.

[0151] FIG. 16 is a schematic diagram showing the distribution of magnetic flux lines when the first magnetic module 40 and the second magnetic module 50 in FIG. 14 are close to each other.

[0152] When the foldable mobile phone is in the folded state, the first housing 10 and the second housing 20 are attached to each other, as shown in Figure 16. At this time, the first magnetic module 40 and the second magnetic module 50 are attracted to each other, and the distribution of magnetic lines of force between the first magnetic module 40 and the second magnetic module 50 is as follows: the two third magnetic poles 501 (N poles) point to the two opposite first magnetic poles 401 (S poles) to form a magnetic circuit, and the second magnetic pole 402 (N pole) points to the opposite fourth magnetic pole 502 (S) to form a magnetic circuit, so that the first magnetic module 40 and the second magnetic module 50 remain attracted.

[0153] In one embodiment provided herein, the first magnetic module 40 is composed of a first magnetic member 41, the bottom of which has a plurality of first magnetic poles 401 and a plurality of second magnetic poles 402, which are alternately arranged along the X-direction. The second magnetic module 50 is composed of a second magnetic member 51, the top of which has a plurality of third magnetic poles 501 and a plurality of fourth magnetic poles 502, which are alternately arranged along the X-direction.

[0154] In one embodiment provided herein, the first magnetic module 40 is composed of a plurality of third magnetic members 42 arranged along the X-direction, with the magnetic poles of two adjacent third magnetic members 42 being opposite, thereby forming a pattern in which a plurality of first magnetic poles 401 and a plurality of second magnetic poles 402 are alternately arranged along the X-direction. The second magnetic module 50 is composed of a plurality of fourth magnetic members 52 arranged along the X-direction, with the magnetic poles of two adjacent fourth magnetic members 52 being opposite, thereby forming a pattern in which a plurality of third magnetic poles 501 and a plurality of fourth magnetic poles 502 are alternately arranged along the X-direction.

[0155] In addition to the aforementioned arrangement of the plurality of first magnetic poles 401 and the plurality of second magnetic poles 402 alternating along a specified direction, the plurality of first magnetic poles 401 and the plurality of second magnetic poles 402 may also be arranged in a checkerboard pattern. Accordingly, the plurality of third magnetic poles 501 and the plurality of fourth magnetic poles 502 may also be arranged in a checkerboard pattern. Details are as follows.

[0156] FIG17 is a schematic diagram of a sixth example of the first magnetic module 40 and the second magnetic module 50 provided in an embodiment of the present application.

[0157] As shown in FIG17 , in one embodiment provided herein, a first magnetic module 40 is comprised of a first magnetic member 41 , the bottom of which has a plurality of first magnetic poles 401 and a plurality of second magnetic poles 402 arranged in a checkerboard pattern. A second magnetic module 50 is comprised of a second magnetic member 51 , the bottom of which has a plurality of third magnetic poles 501 and a plurality of fourth magnetic poles 502 arranged in a checkerboard pattern.

[0158] The multiple first magnetic poles 401 and the multiple second magnetic poles 402 defined herein are arranged in a checkerboard pattern, which can also be understood as being arranged in an array. For example, as shown in FIG. 17 , the multiple first magnetic poles 401 and the multiple second magnetic poles 402 are arranged in a 3×3 array.

[0159] FIG18 is a schematic diagram of a seventh example of the first magnetic module 40 and the second magnetic module 50 provided in an embodiment of the present application.

[0160] As shown in FIG18 , in one embodiment provided by the present application, the first magnetic module 40 is composed of a plurality of third magnetic members 42, which are arranged in a checkerboard pattern, and the magnetic poles of two adjacent third magnetic members 42 are opposite, so as to form a pattern in which a plurality of first magnetic poles 401 and a plurality of second magnetic poles 402 are arranged in a checkerboard pattern. The second magnetic module 50 is composed of a plurality of fourth magnetic members 52, which are arranged in a checkerboard pattern, and the magnetic poles of two adjacent fourth magnetic members 52 are opposite, so as to form a pattern in which a plurality of third magnetic poles 501 and a plurality of fourth magnetic poles 502 are arranged in a checkerboard pattern.

[0161] The definition of "two adjacent third magnetic members 42 having opposite magnetic poles" in this embodiment refers to two third magnetic members 42 adjacent in the X and Y directions, as shown in FIG18 , and does not include two third magnetic members 42 adjacent in a diagonal direction. Similarly, the definition of "two adjacent fourth magnetic members 52 having opposite magnetic poles" is also limited to two fourth magnetic members 52 adjacent in the X and Y directions.

[0162] As shown in FIG18 , in an embodiment provided by the present application, a plurality of third magnetic members 42 are connected to each other, and a plurality of fourth magnetic members 52 are connected to each other.

[0163] Optionally, the interconnection method between the multiple third magnetic parts 42 includes but is not limited to adhesive bonding and mutual abutment. Correspondingly, the interconnection method between the multiple fourth magnetic parts 52 includes but is not limited to adhesive bonding and mutual abutment.

[0164] In this embodiment, the plurality of third magnetic members 42 are connected as a whole, which facilitates the assembly of the first magnetic module 40. Correspondingly, the plurality of fourth magnetic members 52 are connected as a whole, which also has the same advantages.

[0165] FIG19 is a schematic diagram of an eighth example of the first magnetic module 40 and the second magnetic module 50 provided in an embodiment of the present application.

[0166] As shown in FIG19 , in an embodiment provided by the present application, a plurality of third magnetic members 42 are arranged at intervals, and a plurality of fourth magnetic members 52 are arranged at intervals.

[0167] Taking the two third magnetic members 42 set at intervals as an example, Figure 20 is a schematic diagram of the magnetic flux distribution of the third magnetic member 42 in Figure 19. As shown in Figure 20, the two third magnetic members 42 set at intervals can form a magnetic flux loop gathered near themselves.

[0168] Similarly, the plurality of fourth magnetic members 52 arranged at intervals can also form a magnetic flux loop gathered near themselves.

[0169] Figure 21 is a schematic diagram of the magnetic flux distribution when the third magnetic member 42 and the fourth magnetic member 52 in Figure 19 are close to each other. As shown in Figure 21, the two third magnetic members 42 and the two fourth magnetic members 52 arranged at intervals form a magnetic circuit after being attracted.

[0170] FIG22 is a schematic diagram of a first example of the first middle frame 11 and the second middle frame 21 provided in an embodiment of the present application.

[0171] As shown in FIG22 , in one embodiment provided herein, a first housing 10 includes a first middle frame 11, which is provided with a first receiving slot 12, and a first magnetic module 40 is disposed in the first receiving slot 12. A second housing 20 includes a second middle frame 21, which is provided with a second receiving slot 22, and a second magnetic module 50 is disposed in the second receiving slot 22.

[0172] In this embodiment, by opening a first accommodating groove 12 on the first middle frame 11 and a second accommodating groove 22 on the second middle frame 21, the first accommodating groove 12 is used to quickly locate the installation position of the first magnetic module 40 on the first middle frame 11, and the second accommodating groove 22 is used to quickly locate the installation position of the second magnetic module 50 on the second middle frame 21, thereby improving the assembly efficiency of the first magnetic module 40 and the first housing 10, and the second magnetic module 50 and the second housing 20.

[0173] Optionally, there are multiple ways to install the first magnetic module 40 and the first middle frame 11: the first magnetic module 40 can be bonded to the first accommodating groove 12 by adhesive; or, the first magnetic module 40 can be locked in the first accommodating groove 12 by screws; or, the first magnetic module 40 can be fixed in the first accommodating groove 12 by interference fit; or, a snap-fit ​​structure is respectively provided on the first magnetic module 40 and the first accommodating groove 12, and the two are fixedly connected by the snap-fit ​​structure.

[0174] Optionally, there are multiple ways to install the second magnetic module 50 and the second middle frame 21: the second magnetic module 50 can be bonded to the second accommodating groove 22 by adhesive; or, the second magnetic module 50 can be locked in the second accommodating groove 22 by screws; or, the second magnetic module 50 can be fixed in the second accommodating groove 22 by interference fit; or, a snap-fit ​​structure is respectively provided on the second magnetic module 50 and the second accommodating groove 22, and the two are fixedly connected by the snap-fit ​​structure.

[0175] FIG23 is a schematic diagram of the first magnetic module 40 , the first filling member 13 , and the first magnetic conductive sheet 14 provided in an embodiment of the present application.

[0176] As shown in FIG. 23 and FIG. 22 , in one embodiment provided in the present application, there is a gap between the first magnetic module 40 and the side wall of the first receiving groove 12 , and a non-magnetic first filling member 13 is provided in the gap.

[0177] Ideally, there is no gap between the first magnetic module 40 and the first receiving slot 12. However, this requires that the dimensions of the first receiving slot 12 be perfectly aligned with those of the first magnetic module 40, which in turn places high demands on the machining accuracy of the first receiving slot 12, thereby increasing the machining difficulty and manufacturing cost of the first middle frame 11. Therefore, to reduce the machining difficulty and manufacturing cost of the first middle frame 11, a slightly larger first receiving slot 12 can be roughly created, not necessarily perfectly aligned with the dimensions of the first magnetic module 40. This way, after the first magnetic module 40 is placed in the first receiving slot 12, a gap will exist between the two. This gap is filled with a first filler 13 to prevent the first magnetic module 40 from moving within the first receiving slot 12. Furthermore, the first filler 13 should be made of a non-magnetic material such as foam, rubber, or resin to prevent it from interfering with the magnetic flux lines of the first magnetic module 40, allowing the magnetic flux lines of the first magnetic module 40 to diverge along the designed path and form a magnetic circuit.

[0178] In another embodiment provided in the present application, a gap is also provided between the second magnetic module 50 and the side wall of the second receiving groove 22 , and a non-magnetic second filling member is also provided in the gap.

[0179] As shown in FIG. 23 , in one embodiment provided in the present application, a first magnetic conductive sheet 14 is provided on a side of the first magnetic module 40 facing the bottom wall of the first receiving groove 12 .

[0180] In this embodiment, a first magnetic conductive sheet 14 is provided between the bottom wall of the first accommodating groove 12 and the first magnetic module 40, which can further constrain or gather the magnetic flux lines of the first magnetic module 40 near itself, thereby preventing the first magnetic module 40 from attracting foreign objects 71 outside the first housing 10.

[0181] Optionally, the material of the first magnetic conductive sheet 14 includes but is not limited to low carbon steel, cold rolled carbon steel sheet, ferritic stainless steel sheet, silicon steel sheet, etc.

[0182] The above introduction introduces that the first filling piece 13 is used to fill the gap between the first magnetic module 40 and the first accommodating groove 12 to prevent the first magnetic module 40 from shaking in the first accommodating groove 12. The first magnetic module 40 can also be prevented from shaking by setting a limiting structure on the first magnetic conductive sheet 14. That is, in an embodiment provided in the present application, as shown in Figure 23, the edge of the first magnetic conductive sheet 14 has a first limiting portion 141 formed by bending, and there is a gap between the first magnetic module 40 and the side wall of the first accommodating groove 12, and a first limiting portion 141 is set in the gap.

[0183] As shown in FIG. 23 , in one embodiment provided in the present application, a first notch 43 for inserting an external tool is formed between the first magnetic module 40 and the side wall of the first receiving groove 12 .

[0184] In order to facilitate the removal of the first magnetic module 40 , a first notch 43 is formed on the first magnetic module 40 , so that a tool such as a crowbar can be easily inserted into the bottom of the first magnetic module 40 to pry the first magnetic module 40 out of the first receiving slot 12 .

[0185] Optionally, the first notch 43 may be formed by a notch opened on the first magnetic module 40 ; or, the first notch 43 may be formed by a notch opened at the notch of the first accommodating groove 12 .

[0186] FIG24 is a schematic diagram of the second magnetic module 50 and the second magnetic conductive sheet 23 provided in an embodiment of the present application.

[0187] Similar to the function of the first magnetic conductive sheet 14 , as shown in FIG. 24 , in another embodiment provided in the present application, a second magnetic conductive sheet 23 is provided on the side of the second magnetic module 50 facing the bottom wall of the second accommodating groove 22 .

[0188] Optionally, the material of the second magnetic conductive sheet 23 includes but is not limited to low carbon steel, cold rolled carbon steel sheet, ferritic stainless steel sheet, silicon steel sheet, etc.

[0189] Similar to the function of the first limiting portion 141, as shown in Figure 24, in another embodiment provided in the present application, the edge of the second magnetic conductive sheet 23 has a second limiting portion 231 formed by bending, and there is a gap between the second magnetic module 50 and the side wall of the second accommodating groove 22, and the second limiting portion 231 is arranged in the gap.

[0190] Similar to the function of the first notch 43 , in another embodiment provided in the present application, a second notch for inserting an external tool is formed between the second magnetic module 50 and the side wall of the second receiving groove 22 .

[0191] FIG25 is a schematic diagram of a second example of the first middle frame 11 and the second middle frame 21 provided in an embodiment of the present application.

[0192] As shown in Figure 25, in one embodiment provided herein, the first receiving groove 12 includes a first sub-groove 121, a second sub-groove 122, and a third sub-groove 123. The first sub-groove 121, the second sub-groove 122, and the third sub-groove 123 are each provided with a first magnetic module 40. The first sub-groove 121 is located at a corner of the first middle frame 11 away from the shaft assembly 30, and the second sub-groove 122 and the third sub-groove 123 are located at another corner of the first middle frame 11 away from the shaft assembly 30.

[0193] The second receiving groove 22 includes a fourth sub-groove 221, a fifth sub-groove 222, and a sixth sub-groove 223. Each of the fourth sub-groove 221, the fifth sub-groove 222, and the sixth sub-groove 223 is provided with a second magnetic module 50. The fourth sub-groove 221 is located at a corner of the second middle frame 21 away from the shaft assembly 30, and the fifth sub-groove 222 and the sixth sub-groove 223 are located at another corner of the second middle frame 21 away from the shaft assembly 30.

[0194] In this embodiment, the positions of the first receiving groove 12 and the second receiving groove 22 are further limited, so that the first magnetic module 40 and the second magnetic module 50 in the groove are located at the corners of the middle frame, which can attract the first shell 10 and the second shell 20 at the corners. In this way, a more uniform opening and closing feel can be achieved with a smaller number of magnetic modules. Reducing the number of magnetic modules is conducive to the design and installation of some magnetic sensitive devices. The specific reason is that foldable mobile phones generally have devices such as compasses, Hall devices, magnetoresistive devices, speaker modules, etc. that are very sensitive to magnetic field strength. If the layout of such magnetic sensitive devices and the magnetic modules used to attract the foldable mobile phone is unreasonable, the magnetic sensitive devices will easily be interfered with by the magnetic field generated by the magnetic modules, thereby causing problems such as malfunction of the magnetic sensitive devices or poor working accuracy. The magnetic modules arranged at the corners can avoid most areas on the housing, thereby providing more sufficient design and installation locations for these magnetic sensitive devices.

[0195] As shown in FIG25 , in one embodiment provided in the present application, the opening areas of the second sub-groove 122 and the third sub-groove 123 are both smaller than the opening area of ​​the first sub-groove 121. The opening areas of the fifth sub-groove 222 and the sixth sub-groove 223 are both smaller than the opening area of ​​the fourth sub-groove 221.

[0196] In this embodiment, a sub-groove with a larger opening area is provided at one corner, and two sub-grooves with smaller opening areas are provided at the other corner, so as to facilitate structural optimization. For example, when there are more components at the corner of the first housing 10 and there is insufficient space to open a larger first sub-groove 121, this can be achieved by opening two smaller second sub-grooves 122 and a third sub-groove 123; when there are fewer components at the corner and there is sufficient space, a larger first sub-groove 121 can be opened.

[0197] FIG26 is a schematic diagram of the magnetic modules in the first sub-slot 121 , the second sub-slot 122 , the third sub-slot 123 , the fourth sub-slot 221 , the fifth sub-slot 222 and the sixth sub-slot 223 in FIG25 .

[0198] As shown in FIG26 , in one embodiment provided herein, the first magnetic module 40 within the first sub-slot 121 (denoted by C1 in FIG26 ) comprises two first magnetic poles 401 and two second magnetic poles 402 arranged in a checkerboard pattern. The second magnetic module 50 within the fourth sub-slot 221 (denoted by D1 in FIG26 ) comprises two third magnetic poles 501 and two fourth magnetic poles 502 arranged in a checkerboard pattern.

[0199] Furthermore, the first magnetic module 40 in the second sub-slot 122, indicated by C2 in FIG. 26 , has a first magnetic pole 401 and a second magnetic pole 402. The first magnetic module 40 in the third sub-slot 123, indicated by C3 in FIG. 26 , has a first magnetic pole 401 and a second magnetic pole 402.

[0200] The second magnetic module 50 in the fifth sub-slot 222, indicated by D2 in FIG26 , has a third magnetic pole 501 and a fourth magnetic pole 502. The second magnetic module 50 in the sixth sub-slot 223, indicated by D3 in FIG26 , has a third magnetic pole 501 and a fourth magnetic pole 502.

[0201] Moreover, in this embodiment, the first magnetic modules 40 located in the first sub-slot 121, the second sub-slot 122 and the third sub-slot 123 are all composed of a third magnetic member 42 with a single pole magnetization; in this embodiment, the second magnetic modules 50 located in the fourth sub-slot 221, the fifth sub-slot 222 and the sixth sub-slot 223 are all composed of a fourth magnetic member 52 with a single pole magnetization.

[0202] Alternatively, in other embodiments, a combination of unipolar magnetized magnetic members and multipolar magnetized magnetic members may be used. FIG27 is a schematic diagram of a ninth example of a first magnetic module 40 and a second magnetic module 50 provided in an embodiment of the present application. As shown in FIG27 , the first magnetic module 40 is composed of a multipolar magnetized first magnetic member 41 and two unipolar magnetized third magnetic members 42. The second magnetic module 50 is also composed of a multipolar magnetized second magnetic member 51 and two unipolar magnetized fourth magnetic members 52.

[0203] Alternatively, in other embodiments, the first magnetic module 40 and the second magnetic module 50 may be combined using multi-pole magnetized magnetic components. FIG28 is a schematic diagram of the tenth example of the first magnetic module 40 and the second magnetic module 50 provided in an embodiment of the present application. As shown in FIG28 , the first magnetic module 40 is composed of two multi-pole magnetized first magnetic components 41, and the second magnetic module 50 is also composed of two multi-pole magnetized second magnetic components 51.

[0204] In an embodiment provided in the present application, the sidewalls of the first sub-groove 121 and the second sub-groove 122 both have rounded chamfers. The sidewalls of the fourth sub-groove 221 and the fifth sub-groove 222 also have rounded chamfers.

[0205] In this embodiment, the rounded chamfers on the side walls of the groove can disperse stress, thereby avoiding stress concentration at the grooves on the first housing 10 and the second housing 20, thereby improving the strength of the first housing 10 and the second housing 20 and being able to withstand greater impact force when falling.

[0206] Figure 29 is a schematic diagram of a third example of the first middle frame 11 and the second middle frame 21 provided in an embodiment of the present application. Figure 30 is a schematic diagram of the magnetic module in the first receiving groove 12 and the second receiving groove 22 in Figure 29.

[0207] As shown in Figures 29 and 30, in one embodiment provided herein, the first receiving slot 12 is a strip-shaped slot and is located at a periphery of the first housing 10 away from the rotating shaft assembly 30. The first magnetic module 40 within the first receiving slot 12 comprises a plurality of first magnetic poles 401 and a plurality of second magnetic poles 402, which are arranged alternately along a specified direction. The second receiving slot 22 is a strip-shaped slot and is located at a periphery of the second housing 20 away from the rotating shaft assembly 30. The second magnetic module 50 within the second receiving slot 22 comprises a plurality of third magnetic poles 501 and a plurality of fourth magnetic poles 502, which are arranged alternately along a specified direction.

[0208] Furthermore, the first magnetic modules 40 in this embodiment are all composed of the third magnetic member 42 with unipolar magnetization; and the second magnetic modules 50 in this embodiment are all composed of the fourth magnetic member 52 with unipolar magnetization.

[0209] In this embodiment, the structure and position of the first receiving groove 12 and the second receiving groove 22 are further defined, so that the first magnetic module 40 and the second magnetic module 50 in the groove are arranged around the periphery of the housing. The suction effect formed after the mobile phone is folded is a linear suction connection, that is, suction can be provided all around the periphery of the housing, which can reduce or even eliminate the suction blind zone. Because the opening and closing feel of the suction blind zone is softer than that of the suction area, this embodiment can reduce or even eliminate the suction blind zone. This allows the user to feel the same opening and closing feel at any point when unfolding the housing, thereby improving the user experience.

[0210] Finally, it should be noted that the above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. An electronic device, characterized in that, It includes a first housing (10), a second housing (20), and a rotating shaft assembly (30) that rotatably connects the first housing (10) and the second housing (20). The first housing (10) and the second housing (20) can be switched between a folded state and a flattened state; At positions of the first housing (10) and the second housing (20) away from the rotating shaft assembly (30), a first magnetic module (40) and a second magnetic module (50) are respectively provided. When the first housing (10) and the second housing (20) are in the folded state, the first magnetic module (40) and the second magnetic module (50) are attracted to each other; On one side where the first magnetic module (40) and the second magnetic module (50) are attracted to each other, there are a first magnetic pole (401) and a second magnetic pole (402) that are adjacently arranged and have opposite polarities; On the corresponding side of the second magnetic module (50), there is a third magnetic pole (501) with a polarity opposite to that of the first magnetic pole (401) and a fourth magnetic pole (502) with a polarity opposite to that of the second magnetic pole (402). The third magnetic pole (501) and the fourth magnetic pole (502) are adjacently arranged and have opposite polarities.

2. The electronic device according to claim 1, wherein The number of the first magnetic poles (401) and the second magnetic poles (402) is multiple, and the multiple first magnetic poles (401) and the multiple second magnetic poles (402) are alternately arranged along a specified direction; The number of the third magnetic poles (501) and the fourth magnetic poles (502) is multiple, and the multiple third magnetic poles (501) and the multiple fourth magnetic poles (502) are alternately arranged along a specified direction.

3. The electronic device according to claim 1, wherein The number of the first magnetic poles (401) and the second magnetic poles (402) is multiple, and the multiple first magnetic poles (401) and the multiple second magnetic poles (402) are arranged in a checkerboard pattern; The number of the third magnetic poles (501) and the fourth magnetic poles (502) is multiple, and the multiple third magnetic poles (501) and the multiple fourth magnetic poles (502) are arranged in a checkerboard pattern.

4. The electronic device according to any one of claims 1 to 3, characterized in that, The first magnetic module (40) includes a first magnetic member (41), and the first magnetic member (41) is a multi-pole magnetized permanent magnet; The second magnetic module (50) includes a second magnetic member (51), and the second magnetic member (51) is a multi-pole magnetized permanent magnet.

5. The electronic device according to any one of claims 1-3, characterized in that The first magnetic module (40) includes multiple third magnetic members (42), and each third magnetic member (42) is a single-pole magnetized permanent magnet; The second magnetic module (50) includes multiple fourth magnetic members (52), and each fourth magnetic member (52) is a single-pole magnetized permanent magnet.

6. The electronic device according to claim 5, characterized in that, The multiple third magnetic members (42) are connected to each other; The multiple fourth magnetic members (52) are connected to each other.

7. The electronic device according to claim 5, wherein The multiple third magnetic members (42) are spaced apart; The multiple fourth magnetic members (52) are spaced apart.

8. The electronic device according to claim 2 or 3, characterized in that The first magnetic module (40) includes a first magnetic member (41) and multiple third magnetic members (42). The first magnetic member (41) is a multi-pole magnetized permanent magnet, and each third magnetic member (42) is a single-pole magnetized permanent magnet; The second magnetic module (50) includes a second magnetic member (51) and a plurality of fourth magnetic members (52). The second magnetic member (51) is a permanent magnet with multi-pole magnetization, and each of the fourth magnetic members (52) is a permanent magnet with single-pole magnetization.

9. The electronic device according to any one of claims 1-8, characterized in that, The first housing (10) includes a first middle frame (11). The first middle frame (11) is provided with a first receiving groove (12), and the first magnetic module (40) is disposed in the first receiving groove (12). The second housing (20) includes a second middle frame (21). The second middle frame (21) is provided with a second receiving groove (22), and the second magnetic module (50) is disposed in the second receiving groove (22).

10. The electronic device according to claim 9, characterized in that, There is a gap between the first magnetic module (40) and the side wall of the first receiving groove (12), and a non-magnetic first filling member (13) is disposed in the gap. And / or, there is a gap between the second magnetic module (50) and the side wall of the second receiving groove (22), and a non-magnetic second filling member is disposed in the gap.

11. The electronic device according to claim 9, wherein A first magnetic conduction sheet (14) is disposed on one side of the first magnetic module (40) facing the bottom wall of the first receiving groove (12). And / or, a second magnetic conduction sheet (23) is disposed on one side of the second magnetic module (50) facing the bottom wall of the second receiving groove (22).

12. The electronic device according to claim 11, characterized in that, The edge of the first magnetic conduction sheet (14) has a first limiting portion (141) formed by bending. There is a gap between the first magnetic module (40) and the side wall of the first receiving groove (12), and the first limiting portion (141) is disposed in the gap. And / or, the edge of the second magnetic conduction sheet (23) has a second limiting portion (231) formed by bending. There is a gap between the second magnetic module (50) and the side wall of the second receiving groove (22), and the second limiting portion (231) is disposed in the gap.

13. The electronic device according to any one of claims 9-12, characterized in that, A first notch (43) for inserting an external tool is formed between the first magnetic module (40) and the side wall of the first receiving groove (12). And / or, a second notch for inserting an external tool is formed between the second magnetic module (50) and the side wall of the second receiving groove (22).

14. The electronic device according to any one of claims 9-13, characterized in that, The first receiving groove (12) includes a first sub-groove (121), a second sub-groove (122), and a third sub-groove (123). The first magnetic module (40) is disposed in each of the first sub-groove (121), the second sub-groove (122), and the third sub-groove (123). The first sub-groove (121) is located at a corner of the first middle frame (11) away from the rotating shaft assembly (30), and the second sub-groove (122) and the third sub-groove (123) are located at another corner of the first middle frame (11) away from the rotating shaft assembly (30). The second receiving groove (22) includes a fourth sub-groove (221), a fifth sub-groove (222), and a sixth sub-groove (223), and the second magnetic module (50) is provided in each of the fourth sub-groove (221), the fifth sub-groove (222), and the sixth sub-groove (223); the fourth sub-groove (221) is located at a corner of the second middle frame (21) away from the rotating shaft assembly (30), and the fifth sub-groove (222) and the sixth sub-groove (223) are located at another corner of the second middle frame (21) away from the rotating shaft assembly (30).

15. The electronic device according to claim 14, wherein The opening areas of the second sub-groove (122) and the third sub-groove (123) are both smaller than the opening area of the first sub-groove (121); The opening areas of the fifth sub-groove (222) and the sixth sub-groove (223) are both smaller than the opening area of the fourth sub-groove (221).

16. The electronic device according to claim 14 or 15, characterized in that, The first magnetic module (40) in the first sub-groove (121) has two first magnetic poles (401) and two second magnetic poles (402), and the two first magnetic poles (401) and the two second magnetic poles (402) are arranged in a checkerboard pattern; The second magnetic module (50) in the fourth sub-groove (221) has two third magnetic poles (501) and two fourth magnetic poles (502), and the two third magnetic poles (501) and the two fourth magnetic poles (502) are arranged in a checkerboard pattern.

17. The electronic device according to any one of claims 14-16, characterized in that, The groove side walls of the first sub-groove (121) and the second sub-groove (122) both have rounded chamfers; The groove side walls of the fourth sub-groove (221) and the fifth sub-groove (222) have rounded chamfers.

18. The electronic device according to any one of claims 9-13, characterized in that, The first receiving groove (12) is a strip-shaped groove and is located at the periphery of the first housing (10) away from the rotating shaft assembly (30); the first magnetic module (40) in the first receiving groove (12) has a plurality of first magnetic poles (401) and a plurality of second magnetic poles (402), and the plurality of first magnetic poles (401) and the plurality of second magnetic poles (402) are alternately arranged along a specified direction; The second receiving groove (22) is a strip-shaped groove and is located at the periphery of the second housing (20) away from the rotating shaft assembly (30); the second magnetic module (50) in the second receiving groove (22) has a plurality of third magnetic poles (501) and a plurality of fourth magnetic poles (502), and the plurality of third magnetic poles (501) and the plurality of fourth magnetic poles (502) are alternately arranged along a specified direction.

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