Foldable electronic equipment and torsion module thereof
By designing a torque module with magnetic components and cam in the folding screen mobile phone, the problem of loose position of existing folding screen mobile phones in the semi-folded state is solved, and the multi-angle hovering function is realized, which improves the user experience.
Patent Information
- Application Number
- CN202310956713.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-07-31
- Publication Date
- 2025-02-14
Smart Images
Figure CN119449928A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of foldable electronic device structures, and in particular to a foldable electronic device and a torque module thereof. Background Art
[0002] Foldable screen mobile phones are becoming more and more popular among users. However, current foldable screen mobile phones have the problem of lack of damping in the hinges, which causes the phone to be loose in a semi-folded state and unable to achieve multi-angle positioning and hovering. Summary of the invention
[0003] A first aspect of an embodiment of the present application provides a torque module of a foldable electronic device, the torque module comprising a rotating member, an active cam, a passive cam and a magnetic assembly; the active cam is connected to the rotating member and can rotate with the rotating member, the passive cam is in contact and cooperation with the active cam, the active cam can rotate relative to the passive cam under the drive of the rotating member, and then support the passive cam to move in a direction away from the active cam, the magnetic assembly is arranged on a side of the passive cam away from the active cam, and is used to support the passive cam and keep the passive cam in contact and cooperation with the active cam.
[0004] In a second aspect, an embodiment of the present application provides a foldable electronic device, wherein the foldable electronic device includes the torque module described in the above embodiment, and the torque module provides torque between relatively foldable parts of the foldable electronic device.
[0005] The torque module of the foldable electronic device provided in the embodiment of the present application can provide a hovering effect at multiple positions of the hinge of the electronic device by utilizing the structure of the cooperation of the magnetic component and the cam, and has the characteristics of simple structure, reliability and long service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0006] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0007] Figure 1 is a schematic structural diagram of an embodiment of a foldable electronic device of the present application in an unfolded state;
[0008] Figure 2 yes Figure 1 A schematic diagram of the structure of the electronic device in the folded state in the embodiment;
[0009] Figure 3 yes Figure 1A schematic cross-sectional view of the structure of the electronic device at AA in the embodiment;
[0010] Figure 4 It is a schematic diagram of a structural composition block diagram of an embodiment of an electronic device of the present application;
[0011] Figure 5 This is a schematic diagram of the partial structure of an electronic device according to an embodiment of the present application;
[0012] Figure 6 yes Figure 5 Schematic diagram of the disassembly of the structure in the embodiment;
[0013] Figure 7 It is a structural schematic diagram of an embodiment of a torque module of the present application;
[0014] Figure 8 yes Figure 7 A schematic diagram of the split structure of the torque module in the embodiment;
[0015] Fig. 9 yes Figure 7 A schematic cross-sectional structure diagram of a torque module in an embodiment;
[0016] Fig.10 is a structural schematic diagram of another embodiment of the magnetic assembly of the present application;
[0017] Fig.11 is a structural schematic diagram of another embodiment of the magnetic assembly of the present application;
[0018] Fig.12 is a structural schematic diagram of yet another embodiment of the magnetic assembly of the present application;
[0019] Fig.13 It is a structural schematic diagram of another embodiment of the magnetic assembly of the present application;
[0020] Fig.14 It is a structural schematic diagram of another embodiment of the torque module of the present application. DETAILED DESCRIPTION
[0021] The present application is further described in detail below in conjunction with the accompanying drawings and examples. It is particularly noted that the following examples are only used to illustrate the present application, but are not intended to limit the scope of the present application. Similarly, the following examples are only some embodiments of the present application rather than all embodiments, and all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.
[0022] The terms "first", "second", and "third" in the embodiments of the present application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", and "third" can expressly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the embodiments of the present application, all directional indications (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. The terms "including" and "having" in the embodiments of the present application and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or components inherent to these processes, methods, products, or devices.
[0023] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.
[0024] As used herein, "electronic devices" (or simply "terminals") include, but are not limited to, devices configured to receive / send communication signals via a wireline connection (e.g., via a public switched telephone network (PSTN), a digital subscriber line (DSL), a digital cable, a direct cable connection, and / or another data connection / network) and / or via a wireless interface (e.g., for a cellular network, a wireless local area network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter, and / or another communication terminal). Communication terminals configured to communicate via a wireless interface may be referred to as "wireless communication terminals", "wireless terminals" or "mobile terminals". Examples of mobile terminals include, but are not limited to, satellite or cellular phones; personal communication system (PCS) terminals that may combine cellular radiotelephones with data processing, fax, and data communication capabilities; PDAs that may include radiotelephones, pagers, Internet / intranet access, web browsers, organizers, calendars, and / or global positioning system (GPS) receivers; and conventional laptop and / or palmtop receivers or other electronic devices that include radiotelephone transceivers. A mobile phone is an electronic device equipped with a cellular communication module.
[0025] The present application provides a foldable electronic device. Figures 1 to 3 , Figure 1 is a schematic structural diagram of an embodiment of a foldable electronic device of the present application in an unfolded state; Figure 2 yes Figure 1 A schematic diagram of the structure of the electronic device in the folded state in the embodiment; Figure 3 yes Figure 1 Schematic diagram of the structure of the electronic device at AA in the embodiment; it should be noted that the electronic device in the present application may include electronic devices with foldable flexible display screens such as mobile phones, tablet computers, laptop computers, and wearable devices. The electronic device 10 includes but is not limited to the following structures: a housing 100, a display assembly 200, and a circuit assembly 300.
[0026] For more details, please refer to Figure 2 and Figure 3 The housing 100 includes a first housing 110, a second housing 120 and a shaft assembly 130; the first housing 110 and the second housing 120 are respectively connected to the shaft assembly 130, and the first housing 110 and the second housing 120 can rotate with the shaft assembly 130; the detailed structure of the shaft assembly will be described in detail later. The display assembly 200 is respectively connected to the first housing 110 and the second housing 120 and covers the shaft assembly 130, and the display assembly 200 can rotate with the relative rotation (along the axis) of the first housing 110 and the second housing 120 Figure 3 in the direction of the double arrow) and fold ( Figure 2 mid state) or flattened ( Figure 1 medium state).
[0027] Optionally, the circuit assembly 300 may include a battery 310 and a control circuit board 320 , etc. In addition, the electronic device may also include a camera, a speaker, and various sensors, etc.
[0028] See also Figure 4 , Figure 4It is a schematic diagram of the structural composition block diagram of an embodiment of an electronic device of the present application. The electronic device can be a foldable mobile phone, a tablet computer, a laptop computer, a wearable device, etc. The diagram of this embodiment takes a foldable mobile phone as an example. The structure of the electronic device 10 may include an RF circuit 910, a memory 920, an input unit 930, a display unit 940 (which may be the display screen assembly 200 in the above embodiment), a sensor 950, an audio circuit 960, a wifi module 970, a processor 980 (which may be the control circuit board 320 in the above embodiment) and a power supply 990 (which may be the battery 310 in the above embodiment), etc. Among them, the RF circuit 910, the memory 920, the input unit 930, the display unit 940, the sensor 950, the audio circuit 960 and the wifi module 970 are respectively connected to the processor 980; the power supply 990 is used to provide power to the entire electronic device 10.
[0029] Specifically, the RF circuit 910 is used to receive and send signals; the memory 920 is used to store data instruction information; the input unit 930 is used to input information, which may specifically include a touch panel 931 and other input devices 932 such as operation buttons; the display unit 940 may include a display panel 941, etc.; the sensor 950 includes an infrared sensor, a laser sensor, etc., for detecting user approach signals, distance signals, etc.; the speaker 961 and the microphone (or microphone) 962 are connected to the processor 980 through the audio circuit 960 for receiving and sending sound signals; the wifi module 970 is used to receive and transmit wifi signals, and the processor 980 is used to process data information of the electronic device. For the specific structural features of the electronic device, please refer to the relevant description of the above embodiment, which will not be described in detail here.
[0030] Please also read Figure 5 and Figure 6 , Figure 5 This is a schematic diagram of the partial structure of an embodiment of the electronic device of the present application. Figure 6 yes Figure 5 The schematic diagram of the structure in the embodiment is as follows: the shaft assembly 130 in the embodiment includes a shaft housing 131, a connecting assembly 132, and a torque module 1300. The connecting assembly 132 and the torque module 1300 can be two groups, but only one group is shown in the diagram of the embodiment. The two groups of connecting assembly 132 and torque module 1300 are respectively arranged at both ends of the shaft housing 131.
[0031] Please also read Figures 7 to 9 , Figure 7 is a structural schematic diagram of an embodiment of the torque module of the present application, Figure 8 yes Figure 7 Schematic diagram of the split structure of the torque module in the embodiment, Fig. 9 yes Figure 7 A schematic diagram of the cross-sectional structure of the torque module in the embodiment, the torque module 1300 includes a rotating member 1310, an active cam 1320, a passive cam 1330 and a magnetic assembly 1340; wherein the active cam 1320 is connected to the rotating member 1310 and can rotate synchronously with the rotating member 1310, optionally, the active cam 1320 and the rotating member 1310 can be an integral structure.
[0032] The passive cam 1330 is in contact with the active cam 1320, and the active cam 1320 can rotate relative to the passive cam 1330 under the drive of the rotating member 1310, thereby holding the passive cam 1330 to move in a direction away from the active cam 1320, and the magnetic component 1340 is arranged on the side of the passive cam 1330 away from the active cam 1320, and is used to hold the passive cam 1330 and make the passive cam 1330 abut against the active cam 1320. Optionally, the active cam 1320 and the passive cam 1330 can be made of magnetic materials or materials with greater friction between each other, thereby increasing the rotation resistance between the active cam 1320 and the passive cam 1330.
[0033] Optionally, the torque module 1300 in this embodiment further includes a guide rod 1350, one end of the magnetic assembly 1340 is fixed, and the remaining portion can be slidably connected to the guide rod 1350 and can move along the axial direction of the guide rod 1350 (direction of arrow X in the figure).
[0034] Optionally, see Figure 8 The rotating member 1310 in this embodiment may include a first rotating member 1311 and a second rotating member 1312; please refer to Figure 7 The first rotating member 1311 and the second rotating member 1312 are connected to the first shell 110 and the second shell 120 respectively through the first connecting plate 132a and the second connecting plate 132b of the connecting assembly 132 (see Figure 2 and Figure 3 ). The connection assembly 132 in this embodiment further includes a rotating connection frame 132c, the two side structural members (132c1 and 132c2) of the rotating connection frame 132c are respectively rotatably connected to the middle structural member 132c3, the middle structural member 132c3 of the rotating connection frame 132c is fixedly connected to the rotating shaft housing 131, and the two side structural members (132c1 and 132c2) are respectively connected to the first shell 110 and the second shell 120 through the first connecting plate 132a and the second connecting plate 132b. The rotating connection frame 132c can also be connected to the first rotating member 1311 and the second rotating member 1312.
[0035] Among them, the active cam 1320 includes a first active cam 1321 and a second active cam 1322; the first active cam 1321 is connected to the first rotating member 1311, and can rotate synchronously with the first rotating member 1311, and the second active cam 1322 is connected to the second rotating member 1312, and can rotate synchronously with the second rotating member 1312. In this embodiment, the first active cam 1321 and the second active cam 1322 are meshed and connected by a gear 1360 to achieve synchronous rotation. In some other embodiments, other structures can also be used. In this embodiment, only the gear meshing structure is taken as an example for explanation.
[0036] Optionally, the passive cam 1330 includes a first passive cam 1331 and a second passive cam 1332 , wherein the first passive cam 1331 and the second passive cam 1332 may be an integral structure connected by a connecting plate 1333 .
[0037] Optionally, the magnetic assembly 1340 includes a first magnetic assembly 1341 and a second magnetic assembly 1342, and the guide rod 1350 includes a first guide rod 1351 and a second guide rod 1352; the first guide rod 1351 and the second guide rod 1352 are arranged in parallel; the first guide rod 1351 and the second guide rod 1352 are respectively connected to the connecting frame 1370, and the connecting frame 1370 is fixedly connected to the shaft housing 131.
[0038] The first passive cam 1331 and the second passive cam 1332 are in contact with and cooperate with the first active cam 1321 and the second active cam 1322 respectively; the first magnetic assembly 1341 and the second magnetic assembly 1342 are connected with the first guide rod 1351 and the second guide rod 1352 respectively, the first magnetic assembly 1341 is used to support the first passive cam 1331, and the second magnetic assembly 1342 is used to support the second passive cam 1332. The operation dynamic process of the entire torque module is as follows: when the passive cam moves in a direction away from the active cam relative to the active cam, the magnetic assembly provides a force in the direction of the passive cam toward the active cam, so as to make the passive cam resist the active cam, that is, to make the passive cam keep in contact with the active cam.
[0039] Optionally, the magnetic assembly 1340 in this embodiment (both the first magnetic assembly 1341 and the second magnetic assembly 1342) may include at least two magnetic bodies 13400 arranged along the axial direction of the guide rod 1350, and the like magnetic poles of adjacent magnetic bodies 13400 are arranged relative to each other, thereby generating a repulsive force; the magnetic bodies 13400 can reduce the distance between them under the support of the passive cam 1330, and the repulsive force between the magnetic bodies 13400 serves as a supporting force on the passive cam 1330.
[0040] Optionally, see Figure 8 and Fig. 9 In this embodiment, the guide rod 1350 (including the first guide rod 1351 and the second guide rod 1352) is a hollow structure, and the magnetic body 13400 is arranged in the hollow structure of the guide rod 1350. The first passive cam 1331 is provided with a first supporting protrusion 13311 on the side facing the first magnetic assembly 1341, and the first supporting protrusion 13311 is at least partially inserted into the cavity of the first guide rod 1351 and supports the first magnetic assembly 1341; the second passive cam 1332 is provided with a second supporting protrusion 13312 on the side facing the second magnetic assembly 1342, and the second supporting protrusion 13312 is at least partially inserted into the cavity of the second guide rod 1352 and supports the second magnetic assembly 1342. In addition, in some other embodiments, the magnetic body 13400 of the magnetic assembly 1340 can be an annular structure, which is sleeved on the outer periphery of the guide rod 1350.
[0041] Optionally, the torque module 1300 in the embodiment of the present application further includes a second torque member 1380, which can be a compression spring sleeved on the outer periphery of the guide rod 1350. Through the dual action of the magnetic assembly 1340 and the second torque member 1380, the holding force on the passive cam 1330 can be increased.
[0042] Optionally, see Fig.10 , Fig.10 It is a structural schematic diagram of another embodiment of the magnetic assembly of the present application. The guide rod 1350 in this embodiment is a hollow structure. The magnetic body 13400 of the magnetic assembly 1340 is an annular structure and is sleeved on the outer periphery of the guide rod 1350. The torque module 1300 also includes a first torque member 1390. The first torque member 1390 is arranged in the guide rod 1350 and can support the passive cam 1330 together with the magnetic assembly 1340.
[0043] Optionally, please also refer to Fig.11 , Fig.11 1 is a schematic diagram of the structure of another embodiment of the magnetic assembly of the present application. In this embodiment, the first torque member 1390 can be a compression spring ( Fig.11 or at least two second magnetic bodies 13900 ( Fig.10 In the middle structure, the like magnetic poles of adjacent second magnetic bodies 13900 are arranged opposite to each other, thereby generating a repulsive force.
[0044] Please also refer to Fig.12 and Fig.13 , Fig.12 is a structural schematic diagram of another embodiment of the magnetic assembly of the present application, Fig.13It is a schematic diagram of the structure of another embodiment of the magnetic assembly of the present application, wherein the torque member (magnetic assembly) can also be a structure in which a spring 101 (the first spring or the second spring) and a magnetic body 102 are mixed (the spring and the magnetic body are coaxially arranged, and the two are in series contact and connected in the axial direction of the guide rod), as well as a structure in which an externally arranged magnetic body 103 is mixed internally (the magnetic body and the spring (the first spring or the second spring) are mixed). The deformation structures of other structural arrangements and combinations of the magnetic assembly and the torque member are within the scope of understanding of those skilled in the art, and they will not be listed and described in detail here. Of course, the above scheme only introduces a partial structure for providing a holding force, and all of them need to cooperate with the cam structure (active cam and passive cam) in the aforementioned embodiment to achieve the corresponding technical effects such as providing torque and hovering.
[0045] Optionally, see Figure 8 and Fig. 9 The torque module 1300 in this embodiment further includes a first friction member 1301, a second friction member 1302 and a third friction member 1303. The first friction member 1301 is disposed at one end of the first guide rod 1351 away from the first passive cam 1331 and can rotate with the first guide rod 1351. The second friction member 1302 is disposed at one end of the second guide rod 1352 away from the second passive cam 1332 and can rotate with the second guide rod 1352. Both ends of the third friction member 1303 are respectively connected to the first guide rod 1351 and the second guide rod 1352, and then respectively abut against the first friction member 1301 and the second friction member 1302. When the first guide rod 1351 and the second guide rod 1352 rotate relative to each other, the third friction member 1303 generates friction torque with the first friction member 1301 and the second friction member 1302 respectively. Optionally, the first friction member 1301 and the second friction member 1302 may both be two pieces, and the third friction member 1303 is sandwiched between the two pieces. The mark 1304 in the figure indicates a buckle.
[0046] Optionally, the first friction member 1301, the second friction member 1302 and the third friction member 1303 can all be magnetic material members, such as magnets or magnetic material sheets such as iron, cobalt and nickel. The first friction member 1301 and the second friction member 1302 can generate magnetic attraction with the third friction member 1303 respectively, thereby increasing the positive pressure and the friction force. This generates a damping force between the first shell 110 and the second shell 120 of the electronic device, and realizes multi-angle hovering.
[0047] The passive cam 1330 and the active cam 1320 are pressed against each other to restore the original state of the protrusion and the groove. The core principle is that multiple magnets are connected in series in the same direction. The different cam heights affect the magnet space. When the distance between the magnets decreases, the repulsive force increases, and the positive pressure on the cam surface increases, thereby providing (increasing) friction. The positive pressure on the cam surface increases, thereby providing (increasing) friction.
[0048] See also Fig.14 , Fig.14 1 is a schematic diagram of the structure of another embodiment of the torque module of the present application. Different from the above-mentioned embodiment, the guide rod 1350 (including the first guide rod 1351 and the second guide rod 1352 respectively) in this embodiment passes through the passive cam 1330 (the first passive cam 1331 and the second passive cam 1332), the active cam 1320 (the first active cam 1321 and the second active cam 1322) and the rotating member 1310 (the first rotating member 1311 and the second rotating member 1312). The guide rod 1350 can rotate synchronously with the rotating member 1310, thereby driving the first friction member 1301 and the second friction member 1302 to rotate relative to the third friction member 1303, thereby generating friction torque. The technical features of other parts of the torque module in this embodiment can be similar to those in the above-mentioned embodiment, and will not be repeated here.
[0049] The torque module of the foldable electronic device provided in the embodiment of the present application utilizes the structure of the cooperation between the magnetic component and the cam to provide the hinge of the electronic device with multi-angle hovering, and has the characteristics of simple structure, reliability and long service life.
[0050] The above descriptions are only some embodiments of the present application, and do not limit the protection scope of the present application. Any equivalent device or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.
Claims
1. A torque module for a foldable electronic device, characterized in that: The torque module includes a rotating part, an active cam, a passive cam and a magnetic component; the active cam is connected to the rotating part and can rotate with the rotating part, the passive cam is in contact with the active cam, and the active cam can rotate relative to the passive cam under the drive of the rotating part, thereby supporting the passive cam to move in a direction away from the active cam, and the magnetic component is arranged on the side of the passive cam away from the active cam, for supporting the passive cam and keeping the passive cam in contact with the active cam.
2. The torque module according to claim 1, characterized in that: The torsion module also includes a guide rod, the magnetic assembly is connected to the guide rod, one end of the magnetic assembly is fixed, and a partial structure can move along the axial direction of the guide rod.
3. The torque module according to claim 2, characterized in that: The magnetic assembly includes at least two magnetic bodies arranged along the axial direction of the guide rod, and the like poles of adjacent magnetic bodies are arranged opposite to each other, thereby generating a repulsive force; the magnetic bodies can reduce the distance between each other under the support of the passive cam, and the repulsive force between the magnetic bodies serves as the support force on the passive cam.
4. The torque module according to claim 3, characterized in that: The magnetic body is an annular structure and is sleeved on the outer circumference of the guide rod.
5. The torque module according to claim 4, characterized in that: The torsion module also includes a first spring, which is sleeved on the outer periphery of the guide rod. The first spring is coaxially arranged with the magnetic body and is in series contact with the magnetic body in the axial direction of the guide rod.
6. The torque module according to claim 5, characterized in that: The guide rod is a hollow structure. The torque module also includes a first torque member. The first torque member is arranged in the guide rod and can support the passive cam together with the magnetic component.
7. The torque module according to claim 6, characterized in that: The first torsion member is a compression spring and / or at least two second magnetic bodies arranged along the axial direction of the guide rod, and the like magnetic poles of adjacent second magnetic bodies are arranged opposite to each other.
8. The torque module according to claim 3, characterized in that: The guide rod is a hollow structure, and the magnetic body is arranged in the guide rod.
9. The torque module according to claim 3, characterized in that: The torsion module also includes a second spring, which is arranged in the guide rod. The second spring is coaxially arranged with the magnetic body and is connected in series with the magnetic body in the axial direction of the guide rod.
10. The torque module according to claim 9, characterized in that: The torsion module also includes a second torsion member, which is a compression spring and / or a plurality of magnetic bodies sleeved on the outer periphery of the guide rod.
11. The torque module according to claim 2, characterized in that: The rotating member includes a first rotating member and a second rotating member; the active cam includes a first active cam and a second active cam; the passive cam includes a first passive cam and a second passive cam; the magnetic assembly includes a first magnetic assembly and a second magnetic assembly, and the guide rod includes a first guide rod and a second guide rod; the first guide rod and the second guide rod are arranged in parallel, the first active cam is connected to the first rotating member and can rotate synchronously with the first rotating member, the second active cam is connected to the second rotating member and can rotate synchronously with the second rotating member, and the first active cam and the second active cam are connected by gear meshing, thereby realizing synchronous rotation; The first passive cam and the second passive cam are in contact and cooperation with the first active cam and the second active cam respectively; the first magnetic assembly and the second magnetic assembly are connected to the first guide rod and the second guide rod respectively, the first magnetic assembly is used to support the first passive cam, and the second magnetic assembly is used to support the second passive cam.
12. The torque module according to claim 11, characterized in that: The torque module also includes a first friction member, a second friction member and a third friction member. The first friction member is arranged at an end of the first guide rod away from the first passive cam and can rotate with the first guide rod. The second friction member is arranged at an end of the second guide rod away from the second passive cam and can rotate with the second guide rod. The third friction member abuts against the first friction member and the second friction member respectively. When the first guide rod and the second guide rod rotate relatively, the third friction member generates friction torque with the first friction member and the second friction member respectively.
13. The torque module according to claim 12, characterized in that: The first friction member, the second friction member and the third friction member are all made of magnetic materials.
14. A foldable electronic device, characterized in that: The foldable electronic device comprises the torque module according to any one of claims 1 to 13, and the torque module provides a torque between relatively foldable parts of the foldable electronic device.