Rotating shaft mechanism and terminal equipment

Abstract

A rotating shaft mechanism (100) and a terminal device (10000), the rotating shaft mechanism (100) comprising a base (10), at least two connecting pieces (20), and at least two first swing arms (30), the connecting pieces (20) being separately arranged on both sides of the base (10); the first swing arms (30) are arranged on the two sides of the base (10) respectively, and the first swing arms (30) are rotatably connected to the base (10); wherein in the first swing arm (30) and the connecting piece (20) which are located on the same side of the base (10), the first swing arm (30) is provided with a first arc-shaped sliding part (301), the connecting piece (20) is provided with a first arc-shaped sliding fit part (201), and the first arc-shaped sliding part (301) is in sliding fit with the first arc-shaped sliding fit part (201), so that the first swing arm (30) is rotationally connected with the connecting piece (20).

Description

Rotating shaft mechanism and terminal equipment

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on March 22, 2023, with application number 202310355530.7 and application name “Shaft Mechanism and Terminal Equipment”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of foldable electronic devices, and in particular to a hinge mechanism and a terminal device. Background Art

[0003] Foldable electronic devices are electronic devices that can be folded and unfolded, such as foldable screen mobile phones, foldable screen tablets, and foldable screen laptops. Foldable electronic devices generally include a body and a flexible display mounted on the body. The body can be folded or unfolded using its folding mechanism, while the flexible display can fold or unfold along with the body by bending its flexible deformable portion.

[0004] In some cases, the size of the folding mechanism is still relatively large, and it is difficult to further reduce the size when it needs to cooperate normally with components such as flexible displays, making it difficult to further reduce the size of foldable electronic devices.

[0005] Summary of the Invention

[0006] The embodiments of the present application provide a hinge mechanism and a terminal device, which can improve the technical problem in the related art that the size of the folding mechanism is difficult to reduce.

[0007] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0008] In a first aspect, an embodiment of the present application provides a rotating shaft mechanism, the rotating shaft mechanism comprising:

[0009] base;

[0010] At least two connecting members are respectively provided on both sides of the base; and

[0011] At least two first swing arms are respectively provided on both sides of the base, and the first swing arms are rotatably connected to the base;

[0012] Among them, in the first swing arm and the connecting member located on the same side of the base, the first swing arm is provided with a first arc-shaped sliding portion, and the connecting member is provided with a first arc-shaped sliding fitting portion. The first arc-shaped sliding portion slides with the first arc-shaped sliding fitting portion to make the first swing arm and the connecting member rotatably connected.

[0013] The above technical solutions in the embodiments of the present application have at least the following technical effects or advantages:

[0014] The hinge mechanism provided in the embodiment of the present application realizes a rotational connection between the first swing arm and the connecting member through the sliding cooperation between the first arc-shaped sliding portion and the first arc-shaped sliding cooperation portion. The first swing arm and the connecting member can be regarded as being rotationally connected via a virtual axis. During the rotation of the hinge mechanism, the angle of rotation of the first swing arm relative to the base and the angle of rotation of the connecting member relative to the base may be different. Therefore, when the hinge mechanism is applied to the terminal device, during the process of the terminal device rotating from the unfolded state to the folded state, the angle through which the first swing arm rotates relative to the base can be designed as needed, and does not need to be the same as the angle through which the connecting member rotates relative to the base. This can reduce the possibility of interference between the first swing arm and the folding screen of the terminal device when the terminal device is in the folded state, thereby facilitating further miniaturization of the hinge mechanism and thus facilitating a lightweight and thin design of the terminal device.

[0015] In some embodiments of the first aspect, the connecting members located on both sides of the base are capable of relatively rotating based on the base, so that the hinge mechanism is converted between the deployed state and the folded state; when the hinge mechanism is converted from the deployed state to the folded state, the connecting member drives the first swing arm to rotate relative to the base, and the first arc-shaped sliding portion and the first arc-shaped sliding mating portion slide relative to each other, so that the connecting member and the first swing arm are relatively rotated;

[0016] Wherein, when the hinge mechanism is transformed from the unfolded state to the folded state, the rotation angle of the first swing arm relative to the base is less than 90°.

[0017] In some embodiments of the first aspect, one of the first arc-shaped sliding portion and the first arc-shaped sliding fitting portion is an arc-shaped slide rail, and the other is an arc-shaped slide groove; the first arc-shaped sliding portion is in surface contact with the first arc-shaped sliding fitting portion.

[0018] In some embodiments of the first aspect, the first swing arm is a synchronous swing arm.

[0019] In some embodiments of the first aspect, the rotating shaft mechanism further includes a synchronization component, and the first swing arms located on both sides of the base are connected through the synchronization component.

[0020] In some embodiments of the first aspect, the rotating shaft mechanism further includes a damping assembly, wherein the damping assembly is connected to the first swing arm and is used to provide a damping force for the first swing arm.

[0021] In some embodiments of the first aspect, the rotating shaft mechanism further includes a first rotating shaft, and the first swing arm is rotatably connected to the base via the first rotating shaft.

[0022] In some embodiments of the first aspect, the pivot mechanism further includes at least two second swing arms, which are respectively arranged on both sides of the base and are rotatably connected to the base; wherein the second swing arms located on the same side of the base are rotatably connected to the connecting member.

[0023] In some embodiments of the first aspect, the rotating shaft mechanism further includes a second rotating shaft, and the second swing arm and the connecting member located on the same side of the base are rotatably connected via the second rotating shaft.

[0024] In some embodiments of the first aspect, in the second swing arm and the connecting member located on the same side of the base, the second swing arm is provided with a second arc-shaped sliding portion, and the connecting member is provided with a second arc-shaped sliding fitting portion, and the second arc-shaped sliding portion is slidably fitted with the second arc-shaped sliding fitting portion to enable the second swing arm to be rotatably connected to the connecting member.

[0025] In some embodiments of the first aspect, the connecting members located on both sides of the base are capable of relatively rotating based on the base, so that the hinge mechanism is converted between the deployed state and the folded state; when the hinge mechanism is converted from the deployed state to the folded state, the connecting member drives the first swing arm and the second swing arm to rotate relative to the base, and the first arc-shaped sliding portion slides relative to the first arc-shaped sliding fitting portion, so that the connecting member and the first swing arm are relatively rotated, and the second arc-shaped sliding portion slides relative to the second arc-shaped sliding fitting portion, so that the connecting member and the second swing arm are relatively rotated;

[0026] Wherein, when the hinge mechanism is transformed from the unfolded state to the folded state, the rotation angle of the second swing arm relative to the base is less than 90°.

[0027] In some embodiments of the first aspect, one of the second arc-shaped sliding portion and the second arc-shaped sliding fitting portion is an arc-shaped slide rail, and the other is an arc-shaped slide groove; the second arc-shaped sliding portion is in surface contact with the second arc-shaped sliding fitting portion.

[0028] In some embodiments of the first aspect, the pivot mechanism further includes at least two second swing arms, which are respectively arranged on both sides of the base and rotatably connected to the base; wherein the second swing arms located on the same side of the base are slidably connected to the connecting member.

[0029] In some embodiments of the first aspect, a first sliding portion is provided on one of the second swing arm and the connecting member located on the same side of the base, and a first straight sliding groove is provided on the other, and the first sliding portion is slidably engaged with the first straight sliding groove.

[0030] In some embodiments of the first aspect, a third arc-shaped sliding portion is provided on the second swing arm, and a third arc-shaped sliding fitting portion is provided on the base. The third arc-shaped sliding portion slides with the third arc-shaped sliding fitting portion so that the second swing arm is rotatably connected to the base.

[0031] In some embodiments of the first aspect, one of the third arc-shaped sliding portion and the third arc-shaped sliding fitting portion is an arc-shaped slide rail, and the other is an arc-shaped slide groove; the third arc-shaped sliding portion is in surface contact with the third arc-shaped sliding fitting portion.

[0032] In some embodiments of the first aspect, the rotating shaft mechanism further includes a third rotating shaft, and the second swing arm is rotatably connected to the base via the third rotating shaft.

[0033] In some embodiments of the first aspect, the first swing arm is a main swing arm.

[0034] In some embodiments of the first aspect, the rotating shaft mechanism also includes at least two third swing arms, which are respectively arranged on both sides of the base and are rotatably connected to the base; wherein the third swing arms located on the same side of the base are slidably connected to the connecting member.

[0035] In some embodiments of the first aspect, a second sliding portion is provided on one of the third swing arm and the connecting member located on the same side of the base, and a second straight sliding groove is provided on the other, and the second sliding portion is slidably engaged with the second straight sliding groove.

[0036] In some embodiments of the first aspect, the rotating shaft mechanism further includes a fourth rotating shaft, and the first swing arm and the base are rotationally connected via the fourth rotating shaft.

[0037] In some embodiments of the first aspect, the connecting members located on both sides of the base can rotate relative to each other based on the base, so that the hinge mechanism can be converted between the unfolded state and the folded state;

[0038] An arcuate surface is concavely provided on the first swing arm; when the hinge mechanism is in the folded state, the arcuate surface on the first swing arm on one side of the base faces the first swing arm on the other side of the base.

[0039] In some embodiments of the first aspect, the rotating shaft mechanism also includes at least two fourth swing arms, which are respectively arranged on both sides of the base; the fourth swing arms are rotatably connected to the connecting member located on the same side of the base; one of the fourth swing arm and the first swing arm located on the same side of the base is provided with a track groove, and the other is provided with a sliding body, and the sliding body is high-paired with the track groove.

[0040] In some embodiments of the first aspect, in the fourth swing arm and the connecting member located on the same side of the base, the fourth swing arm is provided with a fourth arc-shaped sliding portion, and the connecting member is provided with a fourth arc-shaped sliding fitting portion, and the fourth arc-shaped sliding portion is slidably fitted with the fourth arc-shaped sliding fitting portion to enable the fourth swing arm to be rotatably connected to the connecting member.

[0041] In some embodiments of the first aspect, the rotating shaft mechanism further includes a support member connected to the fourth swing arm;

[0042] The connecting members located on both sides of the base can rotate relative to each other based on the base to convert the hinge mechanism between the unfolded state and the folded state; when the hinge mechanism is in the folded state, the support member is located between the first swing arms located on both sides of the base.

[0043] In some embodiments of the first aspect, the first swing arm includes:

[0044] A first arm portion rotatably connected to the base; and

[0045] at least two second arms connected to the first arm and arranged in sequence along the direction of the rotation axis of the first arm;

[0046] Wherein, in the first swing arm and the connecting member located on the same side of the base, the second arm portion of the first swing arm is provided with the first arc-shaped sliding portion, and the connecting member is provided with a plurality of the first arc-shaped sliding fitting portions, and the first arc-shaped sliding portions are slidably fitted with the first arc-shaped sliding fitting portions in a one-to-one correspondence;

[0047] In the fourth swing arm and the first swing arm located on the same side of the base, the fourth swing arm is located between two adjacent second arm portions of the first swing arm.

[0048] In a second aspect, an embodiment of the present application provides a terminal device, the terminal device comprising:

[0049] A folding device comprising a first shell, a second shell, and the hinge mechanism described in any embodiment of the first aspect; the first shell is connected to the connecting member on one side of the base, and the second shell is connected to the connecting member on the other side of the base; and

[0050] A folding screen is provided on the first shell and the second shell, and the position of the foldable portion of the folding screen corresponds to the position of the rotating shaft mechanism.

[0051] It can be understood that the beneficial effects of the second aspect mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] FIG1 is a schematic diagram of the structure of an electronic device in an unfolded state in some situations;

[0053] FIG2 is a schematic diagram of the structure of an electronic device in a folded state in some situations;

[0054] FIG3 is a schematic structural diagram of a folding mechanism in an unfolded state in some situations;

[0055] FIG4 is a schematic structural diagram of a folding mechanism in a folded state in some situations;

[0056] FIG5 is a schematic structural diagram of a terminal device in an unfolded state provided by some embodiments of the present application;

[0057] FIG6 is a schematic structural diagram of the terminal device shown in FIG5 in a folded state;

[0058] FIG7 is a schematic structural diagram of a rotating shaft mechanism in an expanded state provided by some embodiments of the present application;

[0059] FIG8 is a schematic structural diagram of the rotating shaft mechanism shown in FIG7 in a folded state;

[0060] FIG9 is a cross-sectional schematic diagram of the rotating shaft mechanism shown in FIG7 in an expanded state;

[0061] FIG10 is a cross-sectional schematic diagram of the rotating shaft mechanism shown in FIG7 cooperating with the folding screen in the folded state;

[0062] FIG11 is an exploded view of the rotating shaft mechanism shown in FIG7 ;

[0063] FIG12 is a schematic structural diagram of a rotating shaft mechanism in an expanded state provided in other embodiments of the present application;

[0064] FIG13 is a schematic structural diagram of the rotating shaft mechanism shown in FIG12 in a folded state;

[0065] FIG14 is an exploded view of the rotating shaft mechanism shown in FIG12;

[0066] FIG15 is a schematic structural diagram of a rotating shaft mechanism in an expanded state provided by some other embodiments of the present application;

[0067] FIG16 is a schematic structural diagram of the rotating shaft mechanism shown in FIG15 in a folded state;

[0068] FIG17 is an exploded view of the rotating shaft mechanism shown in FIG15 ;

[0069] FIG18 is a schematic structural diagram of a rotating shaft mechanism in an expanded state provided in some other embodiments of the present application;

[0070] FIG19 is a schematic structural diagram of the rotating shaft mechanism shown in FIG18 in a folded state;

[0071] FIG20 is an exploded view of the rotating shaft mechanism shown in FIG18 .

[0072] Among them, the reference numerals in the figures are:

[0073] 1. Electronic device; 01. Body; 02. Flexible display screen; 021. Flexible deformable portion; 011. Folding mechanism; 0111. Support base; 01111. Side edge; 0112. Secondary swing arm; 01121. Arched portion; 0113. Fixing block; 012. First side panel; 013. Second side panel;

[0074] 10000, terminal device; 2000, foldable screen; 2100, foldable part;

[0075] 1000, folding device; 200, first housing; 300, second housing;

[0076] 100, rotating shaft mechanism; 10, base; 20, connecting member; 30, first swing arm; 301, first arc-shaped sliding portion; 201, first arc-shaped sliding fitting portion;

[0077] 41. Synchronizing assembly; 411. First gear; 412. Second gear; 413. Third gear; 414. Fourth gear;

[0078] 42. Damping assembly; 421. First cam structure; 422. First moving member; 423. Second cam structure; 424. Elastic member; 425. Third cam structure; 426. Second moving member; 427. Fourth cam structure;

[0079] 51, first rotating shaft; 60, second swing arm; 52, second rotating shaft; 601, second arc-shaped sliding portion; 202, second arc-shaped sliding fitting portion; 602, first sliding connection portion; 203, first straight slide groove; 603, third arc-shaped sliding portion; 101, third arc-shaped sliding fitting portion; 53, third rotating shaft; 61, third swing arm; 604, second sliding connection portion; 204, second straight slide groove; 54, fourth rotating shaft; 310, arcuate surface;

[0080] 70. Fourth swing arm; 701. Track groove; 302. Sliding body; 702. Fourth arc-shaped sliding portion; 205. Fourth arc-shaped sliding fitting portion; 31. First arm portion; 32. Second arm portion. DETAILED DESCRIPTION

[0081] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0082] In the description of this application, it should be understood that the terms "length", "width", "thickness", "top", "bottom", "inside", "outside", "up", "down", "left", "right", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this application.

[0083] The terms "first," "second," "third," and "fourth," etc., are used solely for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. For example, the terms "first" and "second" are used solely to distinguish the different swing arms and do not define their order. The first swing arm could be named "second" and the second swing arm could be named "first" without departing from the scope of the various described embodiments. Furthermore, the terms "first," "second," "third," and "fourth," etc., do not necessarily define the features being referred to as different.

[0084] In this application, unless otherwise expressly specified or defined, the terms "connected", "connect", etc. should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or integrated. The relationship between two components defined by the terms "connected", "connected", "fixed", etc. can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be internal communication between two elements or an interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0085] In this application, "and / or" is simply a way to describe the relationship between related objects, indicating that three possible relationships exist. For example, A and / or B can mean that A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0086] It should be noted that, in this application, words such as "in some embodiments," "exemplarily," and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "in some embodiments," "exemplarily," or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "in some embodiments," "exemplarily," and "for example" is intended to present the relevant concepts in a concrete manner.

[0087] In order to make the purpose, technical solutions and advantages of this application more clear, this application is further described in detail below with reference to the accompanying drawings and embodiments.

[0088] Please refer to FIG. 1 and FIG. 2 . FIG. 1 shows a main view of a foldable electronic device 1 in an unfolded state in some situations. FIG. 2 shows a main view of the electronic device 1 shown in FIG. 1 in a folded state.

[0089] The electronic device 1 includes a body 01 and a flexible display screen 02 disposed on the body 01. The body 01 includes a folding mechanism 011, a first side panel 012, and a second side panel 013. The first side panel 012 and the second side panel 013 are respectively connected to either side of the folding mechanism 011 and are capable of rotating between an unfolded state and a folded state based on the folding mechanism 011. The flexible display screen 02 is disposed on the first side panel 012 and the second side panel 013. The position of a flexible deformable portion 021 of the flexible display screen 02 corresponds to the position of the folding mechanism 011. The flexible deformable portion 021 can bend, allowing the flexible display screen 02 to fold or unfold as the first side panel 012 and the second side panel 013 rotate.

[0090] Please refer to FIG1 . When the electronic device 1 is in the unfolded state, the angle between the first side panel 012 and the second side panel 013 is approximately 180°, the flexible display screen 02 is approximately flat, and the flexibly deformable portion 021 of the flexible display screen 02 is approximately flat.

[0091] Please refer to Figure 2. When the electronic device 1 is in the folded state, the angle between the first side panel 012 and the second side panel 013 is approximately 0°, the flexibly deformable portion 021 of the flexible display screen 02 is bent, and the flexible display screen 02 is located between the first side panel 012 and the second side panel 013.

[0092] When the electronic device 1 is in a folded state, if the size of the folding mechanism 011 is set to be small, especially the thickness size is set to be small, it is difficult to provide sufficient accommodation space for the flexible deformable part 021. The folding mechanism 011 is likely to interfere with the flexible deformable part 021, and then exert force on the flexible deformable part 021, which may cause the flexible deformable part 021 to have defects such as arching and wrinkling, or even damage, affecting the appearance and service life of the flexible display screen 02 in the folded state, and thus affecting the service life of the electronic device 1 and the user experience.

[0093] For example, please refer to Figures 3 and 4. Figure 3 shows the folding mechanism 011 cooperating with the flexibly deformable part 021 of the flexible display screen 02 in the unfolded state, and Figure 4 shows the folding mechanism 011 cooperating with the flexibly deformable part 021 of the flexible display screen 02 in the folded state.

[0094] The folding mechanism 011 includes a support base 0111, two auxiliary swing arms 0112 disposed on either side of the support base 0111, and two fixed blocks 0113 disposed on either side of the support base 0111. One end of the auxiliary swing arm 0112 is rotationally connected to the support base 0111 via a rotating shaft, while the other end of the auxiliary swing arm 0112 slides in engagement with the linear grooves of the fixed blocks 0113. The two fixed blocks 0113 are respectively fixedly connected to the first side panel 012 and the second side panel 013. When the electronic device 1 transitions between the folded and unfolded states, the first and second side panels 012 and 013 each drive the two fixed blocks 0113 to rotate relative to the support base 0111. The fixed blocks 0113 then drive the auxiliary swing arm 0112 on the same side to rotate relative to the support base 0111, causing the auxiliary swing arm 0112 to slide within the linear grooves. When the electronic device 1 is transformed from the unfolded state to the folded state, or from the folded state to the unfolded state, the fixed block 0113 and the auxiliary swing arm 0112 rotate at the same angle relative to the support base 0111, both of which are fixed at 90°.

[0095] To allow the secondary swing arm 0112 to clear the side edge 01111 of the support base 0111 when the electronic device 1 is in the unfolded state, the secondary swing arm 0112 generally has a raised portion 01121, with a recessed portion formed on the back of the raised portion 01121. This recessed portion allows the secondary swing arm 0112 to clear the side edge 01111 of the support base 0111. However, when the electronic device 1 is transformed from the unfolded state to the folded state, the secondary swing arm 0112 must rotate 90°, and the raised portion 01121 of the secondary swing arm 0112 is likely to interfere with the flexibly deformable portion 021 of the flexible display 02, which can affect the shape of the flexible display 02 and even damage the flexible display 02.

[0096] Therefore, the current size of the folding mechanism 011 is still relatively large. When it is necessary to ensure that the folding mechanism 011 and components such as the flexible display screen 02 cooperate normally without interference, the size of the folding mechanism 011 is difficult to further reduce (especially the size of the folding mechanism 011 along the width direction when it is in the folded state, where the width direction refers to the direction in which the auxiliary swing arm 0112 on one side of the support base 0111 points to the auxiliary swing arm 0112 on the other side), which makes it difficult to further reduce the weight of the electronic device 1.

[0097] In view of this, an embodiment of the present application provides a hinge mechanism, a folding device including the hinge mechanism, and a terminal device including the folding device, which can improve the technical problem in the related art that the size of the folding mechanism is difficult to further reduce in order to prevent interference between the folding mechanism and the flexible display screen.

[0098] The terminal device provided in the embodiments of the present application is a foldable electronic device, that is, an electronic device that can be folded and unfolded. The terminal device can be a mobile phone, a tablet computer, a laptop computer (Laptop), a notebook PC (Notebook PC), a personal digital assistant (PDA), a wearable device (such as a watch), an in-vehicle device, an augmented reality (AR) / virtual reality (VR) device, etc., but is not limited to these.

[0099] Please refer to Figures 5 and 6. Figure 5 shows a schematic diagram of the three-dimensional structure of a terminal device 10000 provided in some embodiments of the present application in an unfolded state, and Figure 6 shows a front view of the terminal device 10000 shown in Figure 5 in a folded state. For ease of understanding, the embodiments of the present application are described using a mobile phone as an example.

[0100] Under different usage requirements, the terminal device 10000 can be unfolded to the unfolded state, folded to the folded state, or in an intermediate state between the unfolded state and the folded state. It should be understood that the intermediate state can be any state between the unfolded state and the folded state of the terminal device 10000, not the only state.

[0101] The terminal device 10000 includes a folding device 1000 and a folding screen 2000, wherein the folding screen 2000 is arranged on the folding device 1000. The folding device 1000 can provide support and protection for the folding screen 2000 and can be folded or unfolded. The folding screen 2000 is a flexible screen that can be folded or unfolded along with the folding device 1000. It can be understood that the folding screen 2000 can be used to display information and provide an interactive interface for the user, and can be a variety of types of display screens.

[0102] The folding device 1000 includes a hinge mechanism 100, a first housing 200, and a second housing 300. The hinge mechanism 100 is located between the first housing 200 and the second housing 300 and is connected to the first housing 200 and the second housing 300, respectively. The first housing 200 and the second housing 300 can rotate relative to each other based on the hinge mechanism 100, so that they can rotate closer together (i.e., rotate toward each other) to put the terminal device 10000 in a folded state, and can rotate away from each other (i.e., rotate away from each other) to put the terminal device 10000 in an unfolded state.

[0103] It is understood that there may be one or more rotating shaft mechanisms 100. When there are multiple rotating shaft mechanisms 100, each rotating shaft mechanism 100 may be sequentially spaced and positioned between the first housing 200 and the second housing 300.

[0104] Please continue to refer to Figures 5 and 6. The folding screen 2000 is arranged on the first shell 200 and the second shell 300, and can be folded or unfolded as the first shell 200 and the second shell 300 rotate. The folding screen 2000 has a foldable portion 2100. The position of the foldable portion 2100 corresponds to the position of the hinge mechanism 100, that is, the foldable portion 2100 is arranged opposite to the hinge mechanism 100. The foldable portion 2100 is flexible so that when the first shell 200 and the second shell 300 rotate relative to each other, the folding screen 2000 can be folded by bending the foldable portion 2100. When the folding screen 2000 is in a folded state, the foldable portion 2100 can be teardrop-shaped or U-shaped, but is not limited to this shape.

[0105] It is understood that the portion of the folding screen 2000 corresponding to the first housing 200 can be flexible or rigid. The portion of the folding screen 2000 corresponding to the second housing 300 can be flexible or rigid.

[0106] The front of the folding screen 2000 is the side facing away from the hinge mechanism 100, that is, the display surface of the folding screen 2000 for displaying images. The back of the folding screen 2000 is the side facing the hinge mechanism 100, which can also be regarded as the non-display surface of the folding screen 2000.

[0107] Referring to FIG. 5 , when the terminal device 10000 is in the unfolded state, the folding device 1000 and the folding screen 2000 are also in the unfolded state. The first surface of the first housing 200 for mounting the folding screen 2000 and the second surface of the second housing 300 for mounting the folding screen 2000 are approximately coplanar, i.e., the angle between the first and second surfaces is approximately 180°. In this state, the folding screen 2000 is substantially flat, providing the terminal device 10000 with a larger display area. It should be understood that when the folding device 1000 is in the unfolded state, the angle between the first and second surfaces is not necessarily 180°. The angle between the first and second surfaces can also be greater than or less than 180°, but close to 180°. For example, the angle can range from 165° to 190° (e.g., 170°, 173°, 175°, 182°, 185°, etc., but not limited thereto), and the folding screen 2000 can still be unfolded.

[0108] Referring to FIG6 , when the terminal device 10000 is in the folded state, the folding device 1000 and the folding screen 2000 are also in the folded state. The first surface of the first housing 200 for mounting the folding screen 2000 and the second surface of the second housing 300 for mounting the folding screen 2000 are arranged opposite and substantially parallel to each other, i.e., the angle between the first and second surfaces is substantially 0°. At this point, the folding screen 2000 is folded relative to the foldable portion 2100 and in the folded state, facilitating storage of the terminal device 10000. It should be understood that when the folding device 1000 is in the unfolded state, the first and second surfaces are not necessarily absolutely parallel. The angle between them can also be greater than 0°, but close to 0°. For example, the angle can range from 0° to 15° (e.g., 1°, 2°, 3°, 5°, 10°, etc., but not limited thereto), and the folding of the folding screen 2000 can still be achieved.

[0109] In some embodiments, referring to Figures 5 and 6 , the terminal device 10000 may be an inward-folding terminal device, and the folding screen 2000 is an inward-folding folding screen. After the folding screen 2000 is folded, the folding screen 2000 is located between the first housing 200 and the second housing 300.

[0110] Of course, in some other embodiments, the terminal device 10000 may also be an outward-folding terminal device, and the folding screen 2000 is an outward-folding folding screen. After the folding screen 2000 is folded, the display surface of the folding screen 2000 is exposed, and the first housing 200 and the second housing 300 are located between the folding screen 2000.

[0111] In some embodiments, at least one of the first shell 200 and the second shell 300 may be provided with an installation space for installing electronic components of the terminal device 10000. For example, the electronic components may include circuit boards, batteries, receivers, speakers, cameras, etc., but are not limited thereto. Among them, the circuit board can integrate electronic components such as the main controller, storage unit, antenna module, power management module of the terminal device 10000, and the battery can power the folding screen 2000, circuit board, receiver, speaker, camera and other electronic components. The shape and structure of the first shell 200 and the second shell 300 may be the same or different, and are not limited in this embodiment of the application. The first shell 200 and the second shell 300 may be a middle frame structure, and the specific shape and structure can be set as needed, and are not limited in this embodiment of the application.

[0112] Next, the rotating shaft mechanism 100 provided in the embodiment of the present application will be introduced and described.

[0113] To facilitate the description of the various embodiments below, an XYZ three-axis rectangular coordinate system is established. The width direction of the hinge mechanism 100 is defined as the X-axis direction, which is parallel to the direction from the first housing 200 to the second housing 300 when the terminal device 10000 is in the unfolded state. The length direction of the hinge mechanism 100 is defined as the Y-axis direction, which is parallel to the direction from one end of the first housing 200 to the opposite end when the terminal device 10000 is in the unfolded state. The thickness direction of the hinge mechanism 100 is defined as the Z-axis direction, which is parallel to the direction from the first housing 200 to the foldable screen 2000 when the terminal device 10000 is in the unfolded state, that is, parallel to the thickness direction of the terminal device 10000. The X-axis direction, the Y-axis direction, and the Z-axis direction are mutually perpendicular. The X-axis direction includes the positive X-axis direction and the negative X-axis direction, and the same applies to the Y-axis direction and the Z-axis direction. It should be understood that the coordinate system of the hinge mechanism 100 can be flexibly set according to actual needs. This application only provides an example and should not be considered as a special limitation of this application.

[0114] Please refer to Figures 7 to 11. Figure 7 shows a schematic diagram of the three-dimensional structure of the hinge mechanism 100 provided in some embodiments of the present application in the unfolded state, Figure 8 shows a schematic diagram of the three-dimensional structure of the hinge mechanism 100 shown in Figure 7 in the folded state, Figure 9 shows a cross-sectional schematic diagram of the hinge mechanism 100 shown in Figure 7 in the unfolded state, Figure 10 shows a cross-sectional schematic diagram of the hinge mechanism 100 shown in Figure 7 in the folded state, and Figure 11 shows an exploded view of the hinge mechanism 100 shown in Figure 7.

[0115] The hinge mechanism 100 includes a base 10, at least two connecting members 20, and at least two first swing arms 30. Each connecting member 20 is disposed on either side of the base 10. Each first swing arm 30 is disposed on either side of the base 10 and is rotatably connected to the base 10. In each of the first swing arms 30 and the connecting member 20 located on the same side of the base 10, a first arc-shaped sliding portion 301 is provided on the first swing arm 30, and a first arc-shaped sliding mating portion 201 is provided on the connecting member 20. The first arc-shaped sliding portion 301 slidably engages with the first arc-shaped sliding mating portion 201 to enable rotational connection between the first swing arm 30 and the connecting member 20.

[0116] It will be appreciated that the base 10 supports and connects the first swing arm 30 and can have various regular or irregular shapes, such as, but not limited to, a block structure, a frame structure, a shell structure, or a plate structure. The base 10 can be a single component or an assembly comprising multiple assembled components. In some cases, the base 10 is also referred to as a main shaft, a main body, or the like.

[0117] It is understood that each connector 20 is provided on both sides of the base 10, which means that both sides of the base 10 are provided with connectors 20, but the number of connectors 20 on each side can be one or more, and the number of connectors 20 on both sides of the base 10 can be the same or different. It is understood that the two sides of the base 10 refer to the two sides with the central longitudinal section m of the base 10 as the dividing interface, and the central longitudinal section m is a plane parallel to the length direction (i.e., the Y-axis direction) and thickness direction (i.e., the Z-axis direction) of the base 10 and bisecting the base 10 along the width direction (i.e., the X-axis direction) of the base 10. By analogy, the two sides of a component that appears later in the text refer to the two sides with the central longitudinal section of the component as the dividing interface. Optionally, the connectors 20 on both sides of the base 10 can be arranged relative to each other, that is, they are approximately in the same position in the length direction of the base 10. Figures 7 and 8 illustrate this situation by way of example. Of course, in some other embodiments, the connectors 20 on both sides of the base 10 can also be arranged not relative to each other, that is, they are staggered along the length direction of the base 10.

[0118] The connecting member 20 on one side of the base 10 is used to be fixedly connected to the first shell 200, and the connecting member 20 on the other side of the base 10 is used to be fixedly connected to the second shell 300. When the first shell 200 and the second shell 300 rotate relative to each other, the connecting members 20 on both sides of the base 10 are respectively driven to rotate. Optionally, the connecting member 20 on one side of the base 10 and the first shell 200 can be separately formed and connected, for example, they can be connected by fasteners (such as bolts, screws, pins, rivets, etc.); of course, in some other embodiments, the connecting member 20 on one side of the base 10 and the first shell 200 can also be an integrally formed one-piece structure. Similarly, the connecting member 20 on the other side of the base 10 and the second shell 300 can be separately formed and connected, or they can be an integrally formed one-piece structure. The connecting member 20 can be a structural member of various regular or irregular shapes, for example, a block structure, a plate structure, a frame structure, etc., but is not limited thereto.

[0119] It is understood that the first swing arms 30 being provided on both sides of the base 10 means that both sides of the base 10 are provided with first swing arms 30, but the number of first swing arms 30 on each side can be one or more, and the number of first swing arms 30 on both sides of the base 10 can be the same or different. The first swing arms 30 can be connected to the base 10 through various rotational connection methods, so that the first swing arms 30 can rotate relative to the base 10 while being connected to the base 10. The rotation axes of each first swing arm 30 relative to the base 10 can be arranged to be roughly parallel, of course, there can be a certain deviation but they are close to parallel, that is, manufacturing errors, assembly errors, etc. can be allowed. The rotation axis of the first swing arm 30 relative to the base 10 can be roughly parallel to the length direction of the base 10.

[0120] The first swing arm 30 can be of various shapes and can be configured according to actual needs, and is not limited in the embodiments of the present application. The primary function of the first swing arms 30 on both sides of the base 10 is to rotate relative to the base 10. For ease of description, both are referred to as first swing arms. However, the shapes and structures of the first swing arms 30 on both sides of the base 10 can be the same or different.

[0121] Because the first swing arm 30 and the connecting member 20 located on the same side of the base 10 are rotationally connected by the sliding fit of the first arc-shaped sliding portion 301 and the first arc-shaped sliding fitting portion 201, the first arc-shaped sliding portion 301 and the first arc-shaped sliding fitting portion 201 slide relative to each other along an arc-shaped trajectory to achieve relative rotation. The first arc-shaped sliding portion 301 and the first arc-shaped sliding fitting portion 201 are both arc-shaped structures and can be of various forms, as long as the two can slide relative to each other along an arc-shaped trajectory. The first arc-shaped sliding portion 301 and the first swing arm 30 can be a one-piece structure or can be formed separately and fixedly connected; similarly, the first arc-shaped sliding fitting portion 201 and the connecting member 20 can be a one-piece structure or can be formed separately and fixedly connected.

[0122] The connectors 20 on both sides of the base 10 can rotate relative to the base 10 to switch the hinge mechanism 100 between the deployed state and the folded state. When the hinge mechanism 100 is used in the terminal device 10000, as the terminal device 10000 switches between the deployed state and the folded state, the hinge mechanism 100 also switches between the deployed state and the folded state synchronously.

[0123] Please refer to Figures 9 and 10 in sequence. When the hinge mechanism 100 is converted from the unfolded state to the folded state, the connecting members 20 located on both sides of the base 10 are relatively close to each other and rotated. The connecting member 20 drives the first swing arm 30 to rotate relative to the base 10, and the first swing arm 30 located on both sides of the base 10 are also relatively close to each other and rotated. At the same time, the first arc-shaped sliding portion 301 and the first arc-shaped sliding matching portion 201 slide relative to each other, so that the connecting member 20 and the first swing arm 30 rotate relative to each other. The connecting member 20 then moves generally away from the base 10 and away from the first swing arm 30, which can be regarded as the length of the assembly formed by the connecting member 20 and the first swing arm 30 being extended.

[0124] Please refer to Figure 10 and Figure 9 in sequence. When the hinge mechanism 100 is converted from the folded state to the unfolded state, the connecting members 20 located on both sides of the base 10 rotate away from each other, and the connecting member 20 drives the first swing arm 30 to rotate relative to the base 10. The first swing arm 30 located on both sides of the base 10 also rotates away from each other. At the same time, the first arc-shaped sliding portion 301 and the first arc-shaped sliding matching portion 201 slide relative to each other, so that the connecting member 20 and the first swing arm 30 rotate relative to each other. The connecting member 20 then moves roughly toward the base 10 and close to the first swing arm 30. This can be regarded as a shortening of the length of the assembly formed by the connecting member 20 and the first swing arm 30.

[0125] When the terminal device 10000 is an inward-folding terminal device, when the hinge mechanism 100 is in the folded state, an accommodation space for accommodating the foldable portion 2100 of the folding screen 2000 can be formed between the first swing arms 30 on both sides of the base 10. As the hinge mechanism 100 rotates from the unfolded state to the folded state, the connector 20 and the first swing arm 30 rotate relative to each other through the relative sliding of the first arc-shaped sliding portion 301 and the first arc-shaped sliding fitting portion 201, so that the angle through which the first swing arm 30 rotates relative to the base 10 can be smaller than the angle through which the connector 20 rotates relative to the base 10. Compared with the fixed 90° rotation angle between the first swing arm 30 and the connector 20, this is conducive to increasing the accommodation space formed between the first swing arms 30 on both sides of the base 10, and can reduce the possibility of interference between the first swing arm 30 and the foldable portion 2100.

[0126] It can be understood that by changing the position of the center of the first arc-shaped sliding portion 301 and the first arc-shaped sliding fitting portion 201, the angle through which the first swing arm 30 rotates relative to the base 10 during the process of the hinge mechanism 100 rotating from the unfolded state to the folded state can be changed. Therefore, the rotation angle of the first swing arm 30 can be designed according to actual needs, and is not a sole limitation in the embodiments of the present application.

[0127] According to the above description, the hinge mechanism 100 provided in the embodiment of the present application realizes a rotational connection between the first swing arm 30 and the connecting member 20 through the sliding fit between the first arc-shaped sliding portion 301 and the first arc-shaped sliding fitting portion 201. It can be regarded as that the first swing arm 30 and the connecting member 20 are rotationally connected through a virtual axis. When the hinge mechanism 100 is converted between the unfolded state and the folded state, the rotation angle of the first swing arm 30 relative to the base 10 and the rotation angle of the connecting member 20 relative to the base 10 may be different. Therefore, when the hinge mechanism 100 is applied to the terminal device 10000, during the process of the terminal device 10000 rotating from the unfolded state to the folded state, the angle through which the first swing arm 30 rotates relative to the base 10 can be designed as needed, and does not need to be the same as the angle through which the connecting member 20 rotates relative to the base 10. This can reduce the possibility of interference between the first swing arm 30 and the folding screen 2000 of the terminal device 10000 when the terminal device 10000 is in the folded state, which provides space for further reducing the size of the hinge mechanism 100. For example, it is beneficial to reduce the size of the hinge mechanism 100 along the width direction in the folded state, and further facilitates the miniaturization of the size of the hinge mechanism 100, thereby facilitating the lightweight and thin design of the terminal device 10000.

[0128] In some embodiments, referring to Figures 9 and 10, when the hinge mechanism 100 is converted from the unfolded state to the folded state, the rotation angle of the first swing arm 30 relative to the base 10 is less than 90°, that is, the angle through which the first swing arm 30 rotates from the unfolded state to the folded state relative to the base 10 is less than 90°, for example, it can be 50°, 60°, 65°, 70°, 73°, 80°, 85°, etc., but is not limited thereto.

[0129] Similarly, when the hinge mechanism 100 is transformed from the folded state to the unfolded state, the rotation angle of the first swing arm 30 relative to the base 10 is also less than 90°.

[0130] Such an arrangement can reduce the possibility of the first swing arm 30 interfering with the foldable portion 2100 of the folding screen 2000 in the folded state, compared with the case where the first swing arm 30 rotates relative to the base 10 from the unfolded state to the folded state at an angle greater than or equal to 90°, thereby providing space for further reducing the size of the hinge mechanism 100, thereby facilitating further miniaturization of the size of the hinge mechanism 100, and thus facilitating a lightweight and thin design of the terminal device 10000.

[0131] In some embodiments, referring to Figures 9 to 11 , one of the first arcuate sliding portion 301 and the first arcuate sliding fitting portion 201 is a circular arcuate slide rail, and the other is a circular arcuate chute. Figures 9 to 11 exemplify the case where the first arcuate sliding portion 301 is a circular arcuate slide rail and the first arcuate sliding fitting portion 201 is a circular arcuate chute. Of course, the two can also be reversed, that is, the first arcuate sliding portion 301 is a circular arcuate chute and the first arcuate sliding fitting portion 201 is a circular arcuate slide rail. The first arcuate sliding portion 301 is in surface contact with the first arcuate sliding fitting portion 201, and the arcuate slide rail can slide along the groove wall of the circular arcuate chute and contact the groove wall surface of the circular arcuate chute.

[0132] It can be understood that the arc-shaped slide rail can be an arc-shaped slide rail of various structural forms, for example, it can be a plate-shaped arc-shaped slide rail (Figures 7 to 11 show this situation by way of example), or it can be a convex arc-shaped slide rail, but it is not limited to this, as long as it can slide with the arc-shaped slide groove along the arc-shaped track.

[0133] Such a setting, since the arc-shaped slide rail and the arc-shaped slide groove are slidably matched and the two are in surface contact, is beneficial to improving the stability and reliability of the first arc-shaped sliding part 301 and the first arc-shaped sliding matching part 201 when they slide relative to each other, compared with point contact and line contact, thereby improving the stability of the rotational cooperation between the first swing arm 30 and the connecting part 20.

[0134] Alternatively, referring to Figures 7, 8, and 11, the first arcuate sliding engagement portion 201 is a circular arcuate groove. The circular arcuate groove may penetrate the upper surface of the connector 20 to form an opening, thereby allowing the first swing arm 30 to pass through the opening, thereby reducing the overall thickness of the first swing arm 30 and the connector 20. The upper surface of the connector 20 refers to the surface of the connector 20 facing the folding screen 2000. Of course, in other embodiments, the circular arcuate groove may not penetrate the upper surface of the connector 20.

[0135] It should be noted that the cooperation between the first arc-shaped sliding portion 301 and the first arc-shaped sliding fitting portion 201 is not limited to the cooperation between the arc-shaped slide rail and the arc-shaped slide groove.

[0136] Optionally, in some other embodiments, the first arc-shaped sliding portion 301 and the first arc-shaped sliding fitting portion 201 can both be arc-shaped slides or arc-shaped slide rails, and the outer walls of both include arc-shaped walls. The arc-shaped wall of the first arc-shaped sliding portion 301 slides with and contacts the arc-shaped wall of the first arc-shaped sliding fitting portion 201, and the two can also slide along an arc-shaped trajectory to enable the first swing arm 30 to be rotatably connected to the connecting member 20.

[0137] In order to improve the stability of the sliding fit between the first arc-shaped sliding part 301 and the first arc-shaped sliding fitting part 201, optionally, a limit member (which can be a rod-shaped structure, a block-shaped structure or a plate-shaped structure, etc., but not limited to this) can be set on one of the first arc-shaped sliding part 301 and the first arc-shaped sliding fitting part 201, and a limit slot can be set on the other one. The limit member can be passed through the limit slot. When the first arc-shaped sliding part 301 and the first arc-shaped sliding fitting part 201 slide relative to each other, the limit member slides in the limit slot to limit the first arc-shaped sliding part 301 and the first arc-shaped sliding fitting part 201 from disengaging.

[0138] Optionally, in some other embodiments, one of the first arc-shaped sliding portion 301 and the first arc-shaped sliding fitting portion 201 can be an arc-shaped groove, and the other can include multiple sub-sliding portions (the sub-sliding portions can be rod-shaped structures, block structures, etc., but are not limited to this), and each sub-sliding portion is slidably arranged in the arc-shaped groove. The sub-sliding portion and the groove wall of the arc-shaped groove can be in point contact, line contact or surface contact, and the first arc-shaped sliding portion 301 and the first arc-shaped sliding fitting portion 201 can also achieve relative sliding along the arc-shaped trajectory.

[0139] The first swing arm 30 can be a variety of types of swing arms, for example, can be a synchronous swing arm or a main swing arm. Below, the case where the first swing arm 30 is a synchronous swing arm will be exemplarily introduced.

[0140] In some embodiments, as shown in Figures 7 to 11 , the first swing arm 30 is a synchronous swing arm, which is also referred to as an auxiliary swing arm in some cases. A synchronous swing arm is a swing arm that rotates synchronously, i.e., the first swing arms 30 on both sides of the base 10 rotate synchronously (synchronous rotation can be achieved through various synchronous connection methods).

[0141] In the related art, the synchronous swing arm usually needs to rotate a fixed 90° from the deployed state to the folded state, which makes it easy for the synchronous swing arm to interfere with the folding screen 2000 in the folded state. However, in the embodiment of the present application, since the first swing arm 30 and the connecting member 20 are rotationally connected through the sliding fit of the first arc-shaped sliding portion 301 and the first arc-shaped sliding fit portion 201, the angle through which the first swing arm 30, which is the synchronous swing arm, rotates from the deployed state to the folded state can be less than 90°, which can reduce the possibility of the synchronous swing arm interfering with the folding screen 2000 in the folded state. This can break through the bottleneck in the current industry solution that the synchronous swing arm needs to rotate 90° from the deployed state to the folded state, which easily interferes with the folding screen and thus makes it difficult to further miniaturize the overall size of the hinge mechanism. This is conducive to the further miniaturization design of the hinge mechanism 100, and further facilitates the lightweight and thin design of the terminal device 10000.

[0142] Optionally, in some embodiments, referring to FIG. 7 , FIG. 8 and FIG. 11 , the rotating shaft mechanism 100 further includes a synchronization component 41 , and the first swing arms 30 located on both sides of the base 10 are connected via the synchronization component 41 .

[0143] With such arrangement, the first swing arms 30 on both sides of the base 10 can be linked via the synchronization component 41 to achieve synchronous rotation, that is, they can be synchronously rotated closer to each other to a folded state, or synchronously rotated away from each other to an unfolded state.

[0144] It can be understood that the synchronization component 41 can be various components for making two components rotate synchronously, for example, various types of gear components, worm gear transmission components, friction wheel transmission components, etc., but is not limited thereto.

[0145] In a possible embodiment, referring to Figures 7 and 11, the synchronization component 41 may include a first gear 411, a second gear 412, a third gear 413 and a fourth gear 414 that are meshed and connected in sequence, the first gear 411 is connected to the first swing arm 30 located on one side of the base 10, and the fourth gear 414 is connected to the first swing arm 30 located on the other side of the base 10. Therefore, when the first swing arm 30 located on one side of the base 10 rotates relative to the base 10, it can drive the first gear 411 to rotate synchronously, and the first gear 411 can transmit the fourth gear 414 through the meshing of the second gear 412 and the third gear 413, and the fourth gear 414 can drive the first swing arm 30 located on the other side of the base 10 to rotate, and the rotation directions of the first swing arms 30 located on both sides of the base 10 are opposite. The first gear 411 can be directly connected to the first swing arm 30 located on one side of the base 10 (can be formed as one piece or can be formed as two pieces and fixedly connected), or can be indirectly connected through a rotating shaft; similarly, the fourth gear 414 can be directly connected to the first swing arm 30 located on the other side of the base 10 (can be formed as one piece or can be formed as two pieces and fixedly connected), or can be indirectly connected through a rotating shaft.

[0146] 7 and 11 , the first gear 411 , the second gear 412 , the third gear 413 and the fourth gear 414 may all be spur gears, and their rotation axes are substantially parallel.

[0147] For example, the rotation axis of the first gear 411 may be perpendicular to the rotation axis of the second gear 412, the rotation axis of the third gear 413 may be perpendicular to the rotation axis of the fourth gear 414, and the rotation axis of the first gear 411 may be parallel to the rotation axis of the fourth gear 414. The first gear 411, the second gear 412, the third gear 413, and the fourth gear 414 may all be helical gears to achieve meshing transmission between the first gear 411 and the fourth gear 414. Alternatively, one of the first gear 411 and the second gear 412 may be a spur gear and the other a face gear, and one of the third gear 413 and the fourth gear 414 may be a spur gear and the other a face gear, to achieve meshing transmission between the first gear 411 and the fourth gear 414.

[0148] It should be noted that the synchronization assembly 41 is not limited to including four gears, namely, the first gear 411, the second gear 412, the third gear 413, and the fourth gear 414. It may also include two meshing gears, one of which is connected to the first swing arm 30 on one side of the base 10, and the other is connected to the first swing arm 30 on the other side of the base 10. This can also achieve synchronous rotation of the first swing arms 30 on both sides of the base 10 in opposite directions. Of course, the synchronization assembly 41 may also include an even number of gears, such as six, eight, or ten.

[0149] In another possible embodiment, the synchronization assembly 41 may include a worm gear and two worms, the worms meshing with the worm gear, with the worm gear located between the two worms. The two worms are respectively connected to the first swing arms 30 on either side of the base 10, with the rotation axes of the two worms parallel to each other, and the rotation axes of the worms coincide with or are parallel to the rotation axes of the first swing arms 30 to which they are connected. When the first swing arm 30 on one side of the base 10 rotates relative to the base 10, the first swing arm 30 drives the connected worm to rotate simultaneously. The worm then drives the other worm through the worm gear, thereby driving the first swing arm 30 on the other side of the base 10 to rotate. The first swing arms 30 on either side of the base 10 rotate in opposite directions.

[0150] Optionally, in some embodiments, referring to FIG. 7 , FIG. 8 and FIG. 11 , the rotating shaft mechanism 100 further includes a damping assembly 42 , which is connected to the first swing arm 30 for providing a damping force for the first swing arm 30 .

[0151] With such a configuration, the first swing arms 30 located on both sides of the base 10 have a certain damping when they rotate relative to each other, which is beneficial for the first swing arms 30 to maintain or stay at the preset angle position after rotating relative to the base 10, so that the hinge mechanism 100 has a certain buffering effect during the rotation between the unfolded state and the folded state, thereby helping to improve the stability of the terminal device 10000 in different folding modes and the user's operating feel.

[0152] It is understandable that the damping assembly 42 may be any type of damping assembly capable of providing a damping force, for example, a damping assembly including an assembled cam structure and an elastic member, etc., but is not limited thereto.

[0153] In a possible embodiment, referring to Figures 7 and 11, the damping assembly 42 includes a first cam structure 421 arranged on the first swing arm 30, a first moving member 422 located on one side of the first cam structure 421, a second cam structure 423 arranged on the first moving member 422, and an elastic member 424 connected to the first moving member 422. The elastic member 424 is used to provide a force that causes the first moving member 422 to move toward the first cam structure 421, so that the second cam structure 423 is squeezed and contacted with the first cam structure 421. The elastic member 424 can be various types of structural members that can undergo elastic deformation, such as a spring, a leaf spring, a torsion spring, etc., but is not limited to this. When the first swing arm 30 rotates, the first cam structure 421 is driven to rotate at the same time, and the first cam structure 421 and the second cam structure 423 slide relative to each other and generate friction, thereby providing damping force for the rotation of the first swing arm 30.

[0154] As an example, referring to Figures 7 and 11, the first cam structure 421 may include a plurality of first protrusions and first recesses alternately arranged around the circumference of the rotation axis of the first swing arm 30, the second cam structure 423 may include a plurality of second protrusions and second recesses alternately arranged around the circumference of the rotation axis of the first swing arm 30, the first protrusion may be in contact with the inner wall of the second protrusion or the second recess, and the first recess may be in contact with the inner wall of the second protrusion. When the first protrusion is in contact with the second recess and the first recess is in contact with the second protrusion, the first swing arm 30 and the first moving member 422 are relatively limited, similar to the engagement between teeth, so that the first swing arm 30 remains or stays in the corresponding position. When the first swing arm 30 continues to rotate, so that the first protrusion gradually separates from the second recess and gradually moves to the process of contacting and engaging with the second protrusion, the first moving member 422 moves away from the first cam structure 421 and applies a force to the elastic member 424, and the elastic member 424 also applies a corresponding reaction force to provide a damping force for the rotation of the first swing arm 30.

[0155] Alternatively, referring to Figure 11, the damping assembly 42 can also include a third cam structure 425 arranged on the first swing arm 30, a second moving member 426 positioned on one side of the third cam structure 425, and a fourth cam structure 427 arranged on the second moving member 426. The third cam structure 425 is relative to the first cam structure 421 and is spaced apart, and the first moving member 422, the second moving member 426 and the elastic member 424 are all located between the third cam structure 425 and the first cam structure 421. The elastic member 424 is located between the first moving member 422 and the second moving member 426 and is connected to the first moving member 422 and the second moving member 426 respectively. The elastic member 424 is also used to provide a force that causes the second moving member 426 to move toward the third cam structure 425, so that the fourth cam structure 427 is squeezed and contacted with the third cam structure 425. When the first swing arm 30 rotates, the first cam structure 421 and the third cam structure 425 are driven to rotate simultaneously. The first cam structure 421 slides relative to the second cam structure 423 to generate friction, and the third cam structure 425 slides relative to the fourth cam structure 427 to generate friction, thereby providing damping force for the rotation of the first swing arm 30.

[0156] The structure of the third cam structure 425 may be the same as that of the first cam structure 421 , and the structure of the fourth cam structure 427 may be the same as that of the second cam structure 423 , which will not be described in detail herein.

[0157] It can be understood that the number of the first cam structure 421, the first moving member 422, the second cam structure 423, the elastic member 424, the third cam structure 425, the second moving member 426 and the fourth cam structure 427 can be at least two, and each of the first cam structure 421, the first moving member 422, the second cam structure 423, the elastic member 424, the third cam structure 425, the second moving member 426 and the fourth cam structure 427 can form a damping group to form at least two damping groups, so that each damping group is respectively connected to the first swing arm 30 located on both sides of the base 10, and the damping group can be set in a one-to-one correspondence with the first swing arm 30. The first moving members 422 located on both sides of the base 10 can be fixedly connected so as to be able to move simultaneously; similarly, the second moving members 426 located on both sides of the base 10 can be fixedly connected so as to be able to move simultaneously.

[0158] In another possible embodiment, the damping assembly 42 may include a cam member, a sliding member, and an elastomer. The cam member may be fixed to the base 10 and have a cam surface. The sliding member may be slidably disposed on the first swing arm 30 or the connecting member 20 so as to be able to slide toward or away from the base 10. One side of the sliding member abuts the cam surface of the cam member, and the other side of the sliding member is connected to the first swing arm 30 or the connecting member 20 via the elastomer. The elastomer may be used to provide an elastic force to move the sliding member toward the base 10, thereby ensuring that the sliding member is always elastically abutted against the cam surface of the cam member. The elastic deformation of the elastomer is in a direction that is substantially the same as the sliding direction of the sliding member, i.e., substantially perpendicular to the rotation axis of the first swing arm 30. The abutment force between the sliding member and the cam member is converted into a damping force of the damping assembly 42 and outputted outwardly to provide a damping force for the rotation of the first swing arm 30.

[0159] Optionally, in some embodiments, referring to FIG. 7 , FIG. 9 and FIG. 11 , the rotating shaft mechanism 100 further includes a first rotating shaft 51 , and the first swing arm 30 is rotatably connected to the base 10 via the first rotating shaft 51 .

[0160] It can be understood that the first rotating shaft 51 can be a rotating shaft that is separately molded from the first swing arm 30 and the base 10. The first swing arm 30 and the base 10 can be respectively provided with rotating shaft holes. The first rotating shaft 51 can be passed through the rotating shaft holes on the first swing arm 30 and the base 10 to realize the rotational connection between the first swing arm 30 and the base 10. This situation is exemplarily shown in Figures 7 and 11.

[0161] Of course, the first rotating shaft 51 can also be a one-piece structure integrally formed with the first swing arm 30, with a rotating shaft hole being provided on the base 10, and the first rotating shaft 51 rotatably engaged with the rotating shaft hole on the base 10. Similarly, the first rotating shaft 51 can also be a one-piece structure integrally formed with the base 10, with a rotating shaft hole being provided on the first swing arm 30, and the first rotating shaft 51 rotatably engaged with the rotating shaft hole on the first swing arm 30.

[0162] With this arrangement, the first swing arm 30 and the base 10 are rotationally connected via a physical axis, which can improve connection reliability compared to a virtual axis connection, thereby improving the reliability of the rotation axis mechanism 100 in switching between the unfolded state and the folded state.

[0163] Alternatively, referring to Figures 7, 9, and 11, the first swing arms 30 located on either side of the base 10 can be rotatably connected to the base 10 via a first rotating shaft 51. When the synchronization assembly 41 includes a first gear 411, a second gear 412, a third gear 413, and a fourth gear 414 that are sequentially meshed and connected, the first gear 411 and the fourth gear 414 can be fixedly connected to the first rotating shaft 51 located on either side of the base 10, respectively, so as to rotate synchronously with the corresponding first rotating shaft 51. In this case, the first swing arm 30 is also fixedly connected to the first rotating shaft 51 so as to rotate synchronously. The second gear 412 and the third gear 413 can be rotatably mounted on the base 10 via other rotating shafts. This helps improve the compactness of the first swing arm 30, the first rotating shaft 51, and the synchronization assembly 41.

[0164] Referring to FIG11 , when the damping assembly 42 includes a first movable member 422, an elastic member 424, and a second movable member 426, in the damping group and the first rotating shaft 51 located on the same side of the base 10, the first movable member 422 and the second movable member 426 of the damping group can be sleeved on the first rotating shaft 51 to be movable along the axis of the first rotating shaft 51, and the elastic member 424 of the damping group can be a spring and sleeved on the first rotating shaft 51 to be able to extend and retract along the axis of the first rotating shaft 51. This helps to improve the compactness between the first swing arm 30, the first rotating shaft 51, and the damping assembly 42.

[0165] Optionally, in some embodiments, referring to Figures 7, 8, and 11, the hinge mechanism 100 further includes at least two second swing arms 60, each of which is disposed on either side of the base 10 and rotatably connected to the base 10. The second swing arms 60 located on the same side of the base 10 are rotatably connected to the connector 20.

[0166] It can be understood that the second swing arms 60 are arranged on both sides of the base 10, which means that second swing arms 60 are provided on both sides of the base 10, but the number of second swing arms 60 on each side can be one or more, and the number of second swing arms 60 on both sides of the base 10 can be the same or different.

[0167] The second swing arm 60 can be connected to the base 10 through various rotational connection methods, so that the second swing arm 60 can rotate relative to the base 10 while being connected to the base 10. The rotation axes of the second swing arms 60 relative to the base 10 can be arranged to be substantially parallel, although there can be some deviation, but close to parallel, to allow for manufacturing errors, assembly errors, etc. The rotation axes of the second swing arms 60 relative to the base 10 can be substantially parallel to the longitudinal direction of the base 10. The second swing arm 60 can be rotatably connected to the connector 20 located on the same side of the base 10 through various rotational connection methods.

[0168] The second swing arm 60 can be of various shapes and can be configured according to actual needs, and is not limited in the embodiments of the present application. The main function of the second swing arms 60 on both sides of the base 10 is to rotate relative to the base 10. For ease of description, they are both referred to as second swing arms. However, the shapes and structures of the second swing arms 60 on both sides of the base 10 can be the same or different.

[0169] With such an arrangement, the second swing arm 60 can be regarded as the main swing arm, and the connecting member 20 is rotatably connected to the base 10 through the first swing arm 30 and the second swing arm 60, which can be regarded as forming a hinged four-bar mechanism, which is beneficial to improving the stability of the rotating shaft mechanism 100 in the transition between the unfolded state and the folded state.

[0170] Regarding the rotational connection between the second swing arm 60 and the connecting member 20, there are multiple feasible implementations, which will be described below as examples.

[0171] In a possible implementation, referring to FIG. 7 and FIG. 11 , the rotating shaft mechanism 100 further includes a second rotating shaft 52 , and the second swing arm 60 and the connecting member 20 located on the same side of the base 10 are rotatably connected via the second rotating shaft 52 .

[0172] It can be understood that the second rotating shaft 52 can be a rotating shaft that is separately formed from the second swing arm 60 and the connecting member 20. The second swing arm 60 and the connecting member 20 can be respectively provided with rotating shaft holes. The second rotating shaft 52 can be passed through the rotating shaft hole on the second swing arm 60 and the rotating shaft hole on the connecting member 20 to realize the rotational connection between the second swing arm 60 and the connecting member 20. This situation is exemplarily shown in Figures 7 and 11.

[0173] Of course, the second rotating shaft 52 can also be a one-piece structure integrally formed with the second swing arm 60, with a rotating shaft hole being provided on the connecting member 20, and the second rotating shaft 52 rotatably engages with the rotating shaft hole on the connecting member 20. Similarly, the second rotating shaft 52 can also be a one-piece structure integrally formed with the connecting member 20, with a rotating shaft hole being provided on the second swing arm 60, and the second rotating shaft 52 rotatably engages with the rotating shaft hole on the second swing arm 60.

[0174] With this arrangement, the second swing arm 60 and the connecting member 20 are rotationally connected via a physical axis, which can improve the connection reliability compared to a virtual axis connection, and further improve the reliability of the rotation axis mechanism 100 in switching between the unfolded state and the folded state.

[0175] Please refer to Figures 12 to 14. Figure 12 shows a schematic diagram of the three-dimensional structure of the rotating shaft mechanism 100 in the unfolded state provided in other embodiments of the present application. Figure 13 shows a schematic diagram of the three-dimensional structure of the rotating shaft mechanism 100 shown in Figure 12 in the folded state. Figure 14 shows an exploded view of the rotating shaft mechanism 100 shown in Figure 12.

[0176] In another possible embodiment, in the second swing arm 60 and the connecting member 20 located on the same side of the base 10, a second arc-shaped sliding portion 601 is provided on the second swing arm 60, and a second arc-shaped sliding fitting portion 202 is provided on the connecting member 20. The second arc-shaped sliding portion 601 is slidably fitted with the second arc-shaped sliding fitting portion 202 to enable the second swing arm 60 to be rotatably connected to the connecting member 20.

[0177] The second arc-shaped sliding portion 601 and the second arc-shaped sliding mating portion 202 slide relative to each other along an arc-shaped trajectory, achieving relative rotation. Both the second arc-shaped sliding portion 601 and the second arc-shaped sliding mating portion 202 are arc-shaped structures, and can be any type of arc-shaped structure, as long as they can engage and mate relative to each other by sliding along an arc-shaped trajectory. The second arc-shaped sliding portion 601 and the second swing arm 60 can be integrally formed as a one-piece structure, or they can be formed as separate pieces and fixedly connected. Similarly, the second arc-shaped sliding mating portion 202 and the connecting member 20 can be integrally formed as a one-piece structure, or they can be formed as separate pieces and fixedly connected.

[0178] When the hinge mechanism 100 transitions from the unfolded state to the folded state, the connectors 20 on either side of the base 10 relatively move toward each other and rotate, driving the first swing arm 30 and the second swing arm 60 to rotate relative to the base 10. The first swing arm 30 on either side of the base 10 also moves toward each other and rotates. Simultaneously, the first arcuate sliding portion 301 slides relative to the first arcuate sliding fitting portion 201, causing the connector 20 and the first swing arm 30 to rotate relative to each other. The connector 20 then moves generally away from the base 10 and away from the first swing arm 30, which can be considered as an extension of the length of the assembly formed by the connector 20 and the first swing arm 30. The second swing arm 60 on either side of the base 10 also moves toward each other and rotates. Simultaneously, the second arcuate sliding portion 601 slides relative to the second arcuate sliding fitting portion 202, causing the connector 20 and the second swing arm 60 to rotate relative to each other. The connector 20 then moves generally away from the base 10 and away from the second swing arm 60, which can be considered as an extension of the length of the assembly formed by the connector 20 and the second swing arm 60.

[0179] When the hinge mechanism 100 is converted from the folded state to the unfolded state, the connecting members 20 located on both sides of the base 10 rotate away from each other, and the connecting members 20 drive the first swing arm 30 and the second swing arm 60 to rotate relative to the base 10; the first swing arm 30 located on both sides of the base 10 also rotates away from each other. At the same time, the first arc-shaped sliding portion 301 slides relative to the first arc-shaped sliding fitting portion 201, so that the connecting member 20 and the first swing arm 30 rotate relative to each other. The connecting member 20 moves generally toward the base 10 and closer to the first swing arm 30, which can be regarded as a shortening of the length of the assembly formed by the connecting member 20 and the first swing arm 30; the second swing arm 60 located on both sides of the base 10 also rotates away from each other. At the same time, the second arc-shaped sliding portion 601 slides relative to the second arc-shaped sliding fitting portion 202, so that the connecting member 20 and the second swing arm 60 rotate relative to each other. The connecting member 20 moves generally toward the base 10 and closer to the second swing arm 60, which can be regarded as a shortening of the length of the assembly formed by the connecting member 20 and the second swing arm 60.

[0180] When the terminal device 10000 is an inward-folding terminal device, when the hinge mechanism 100 is in the folded state, an accommodation space for accommodating the foldable portion 2100 of the foldable screen 2000 can be formed between the second swing arms 60 on both sides of the base 10. As the hinge mechanism 100 rotates from the unfolded state to the folded state, the connector 20 and the second swing arm 60 rotate relative to each other through the relative sliding of the second arc-shaped sliding portion 601 and the second arc-shaped sliding fitting portion 202, so that the angle through which the second swing arm 60 rotates relative to the base 10 can be smaller than the angle through which the connector 20 rotates relative to the base 10. Compared with the fixed 90° rotation angle between the second swing arm 60 and the connector 20, this is conducive to increasing the accommodation space formed between the second swing arms 60 on both sides of the base 10, and can reduce the possibility of interference between the second swing arm 60 and the foldable portion 2100.

[0181] It can be understood that by changing the position of the center of the second arc-shaped sliding portion 601 and the second arc-shaped sliding fitting portion 202, the angle through which the second swing arm 60 rotates relative to the base 10 during the process of the hinge mechanism 100 rotating from the unfolded state to the folded state can be changed. Therefore, the rotation angle of the second swing arm 60 can be designed according to actual needs, and is not a sole limitation in the embodiments of the present application.

[0182] In this arrangement, since the second swing arm 60 and the connecting member 20 are rotationally connected through the sliding fit between the second arc-shaped sliding portion 601 and the second arc-shaped sliding fit portion 202, it can be regarded as that the second swing arm 60 and the connecting member 20 are rotationally connected through a virtual axis. When the hinge mechanism 100 is converted between the unfolded state and the folded state, the angle of rotation of the second swing arm 60 relative to the base 10 and the angle of rotation of the connecting member 20 relative to the base 10 may be different. Therefore, when the hinge mechanism 100 is applied to the terminal device 10000, during the process of the terminal device 10000 rotating from the unfolded state to the folded state, the angle through which the second swing arm 60 rotates relative to the base 10 can be designed as needed, and does not need to be the same as the angle through which the connecting member 20 rotates relative to the base 10. This can reduce the possibility of interference between the second swing arm 60 and the folding screen 2000 of the terminal device 10000 when the terminal device 10000 is in the folded state, which provides space for further reducing the size of the hinge mechanism 100, thereby facilitating further miniaturization of the size of the hinge mechanism 100, thereby facilitating a lightweight and thin design of the terminal device 10000.

[0183] Optionally, when the hinge mechanism 100 is converted from the unfolded state to the folded state, the rotation angle of the second swing arm 60 relative to the base 10 is less than 90°, that is, the angle through which the second swing arm 60 rotates from the unfolded state to the folded state relative to the base 10 is less than 90°, for example, it can be 50°, 60°, 65°, 70°, 73°, 80°, 85°, etc., but is not limited to this.

[0184] Similarly, when the hinge mechanism 100 is transformed from the folded state to the unfolded state, the rotation angle of the second swing arm 60 relative to the base 10 is also less than 90°.

[0185] Such an arrangement can reduce the possibility of the second swing arm 60 interfering with the foldable portion 2100 of the folding screen 2000 in the folded state, compared with the case where the second swing arm 60 rotates relative to the base 10 from the unfolded state to the folded state at an angle greater than or equal to 90°, thereby providing space for further reducing the size of the hinge mechanism 100, thereby facilitating further miniaturization of the size of the hinge mechanism 100, and thus facilitating a lightweight and thin design of the terminal device 10000.

[0186] Alternatively, referring to Figures 12 to 14 , one of the second arcuate sliding portion 601 and the second arcuate sliding mating portion 202 is a circular arcuate slide rail, and the other is a circular arcuate chute. Figure 14 exemplifies a case where the second arcuate sliding portion 601 is a circular arcuate slide rail and the second arcuate sliding mating portion 202 is a circular arcuate chute. Of course, the two can also be reversed, i.e., the second arcuate sliding portion 601 is a circular arcuate chute and the second arcuate sliding mating portion 202 is a circular arcuate slide rail. The second arcuate sliding portion 601 and the second arcuate sliding mating portion 202 are in surface contact, and the arcuate slide rail can slide along the groove wall of the circular arcuate chute and contact the groove wall of the circular arcuate chute.

[0187] Such a setting, since the arc-shaped slide rail and the arc-shaped slide groove are slidingly matched and the two are in surface contact, is beneficial to improving the stability and reliability of the second arc-shaped sliding part 601 and the second arc-shaped sliding matching part 202 when they slide relative to each other compared to point contact and line contact, thereby improving the stability of the rotational matching between the second swing arm 60 and the connecting part 20.

[0188] In the above embodiment, a solution of rotational connection between the second swing arm 60 and the connecting member 20 is introduced. However, the cooperation between the second swing arm 60 and the connecting member 20 is not limited to rotational connection, and other solutions will be exemplarily introduced below.

[0189] Please refer to Figures 15 to 17. Figure 15 shows a schematic diagram of the three-dimensional structure of the rotating shaft mechanism 100 in the unfolded state provided by some embodiments of the present application. Figure 16 shows a schematic diagram of the three-dimensional structure of the rotating shaft mechanism 100 shown in Figure 15 in the folded state. Figure 17 shows an exploded view of the rotating shaft mechanism 100 shown in Figure 15.

[0190] Optionally, in some other embodiments, the hinge mechanism 100 includes at least two second swing arms 60, which are respectively provided on both sides of the base 10 and rotatably connected to the base 10. The second swing arms 60 located on the same side of the base 10 are slidably connected to the connector 20.

[0191] With this arrangement, the second swing arm 60 can also be regarded as the main swing arm, and the connecting member 20 is rotatably connected to the base 10 through the first swing arm 30 and the second swing arm 60, which is also beneficial to improving the stability of the rotating shaft mechanism 100 in the transition between the unfolded state and the folded state.

[0192] Optionally, referring to Figures 15 to 17, one of the second swing arm 60 and the connecting member 20 located on the same side of the base 10 is provided with a first sliding portion 602, and the other is provided with a first straight sliding groove 203, and the first sliding portion 602 is slidably engaged with the first straight sliding groove 203.

[0193] It is understood that the first sliding portion 602 can have various regular or irregular shapes, such as a plate-like structure (such a case is exemplarily shown in FIG17 ), a sheet-like structure, a block-like structure, etc., but is not limited thereto, as long as it can cooperate with the first straight slide 203 so that the two can slide relative to each other along a substantially straight path. The first straight slide 203 is a slide having a straight path, so that the first sliding portion 602 slides within the first straight slide 203 along a substantially straight path.

[0194] With this arrangement, when the hinge mechanism 100 switches between the unfolded state and the folded state, the connecting member 20 and the second swing arm 60 rotate synchronously, and the first sliding portion 602 slides in the first straight slot 203 .

[0195] There are many feasible implementations for the rotational connection between the second swing arm 60 and the base 10, which will be described below as examples.

[0196] In a possible embodiment, referring to Figures 7, 8 and 11, a third arc-shaped sliding portion 603 is provided on the second swing arm 60, and a third arc-shaped sliding fitting portion 101 is provided on the base 10. The third arc-shaped sliding portion 603 slides with the third arc-shaped sliding fitting portion 101 to enable the second swing arm 60 to be rotatably connected to the base 10.

[0197] The third arc-shaped sliding portion 603 and the third arc-shaped sliding mating portion 101 slide relative to each other along an arc-shaped trajectory, achieving relative rotation. Both the third arc-shaped sliding portion 603 and the third arc-shaped sliding mating portion 101 are arc-shaped structures, and can be of various types, as long as they can engage and mate relative to each other by sliding along an arc-shaped trajectory. The third arc-shaped sliding portion 603 and the second swing arm 60 can be integrally formed as a one-piece structure, or they can be formed as separate pieces and fixedly connected. Similarly, the third arc-shaped sliding mating portion 101 and the base 10 can be integrally formed as a one-piece structure, or they can be formed as separate pieces and fixedly connected.

[0198] With such a configuration, the second swing arm 60 and the base 10 can be regarded as being rotationally connected via a virtual axis. Compared with a rotational connection via a physical axis, this is beneficial to reducing the overall thickness dimension formed by the second swing arm 60 and the base 10, and further beneficial to reducing the thickness dimension of the hinge mechanism 100, thereby facilitating a lightweight and thin design of the terminal device 10000.

[0199] Alternatively, referring to Figures 7 and 11 , one of the third arcuate sliding portion 603 and the third arcuate sliding fitting portion 101 is a circular arcuate slide rail, and the other is a circular arcuate chute. Figure 11 exemplifies a case where the third arcuate sliding portion 603 is a circular arcuate slide rail and the third arcuate sliding fitting portion 101 is a circular arcuate chute. Of course, the two can also be reversed, i.e., the third arcuate sliding portion 603 is a circular arcuate chute and the third arcuate sliding fitting portion 101 is a circular arcuate slide rail. The third arcuate sliding portion 603 is in surface contact with the third arcuate sliding fitting portion 101, and the arcuate slide rail can slide along the groove wall of the circular arcuate chute and contact the groove wall of the circular arcuate chute.

[0200] Such a setting, since the arc-shaped slide rail and the arc-shaped slide groove are slidably matched and the two are in surface contact, is beneficial to improving the stability and reliability of the third arc-shaped sliding part 603 and the third arc-shaped sliding matching part 101 when they slide relative to each other, compared with point contact and line contact, thereby improving the stability of the rotational cooperation between the second swing arm 60 and the base 10.

[0201] Optionally, referring to Figures 7 and 11, when the second swing arm 60 is rotationally connected to the connecting member 20 located on the same side of the base 10 through the second rotating shaft 52, it is beneficial to further improve the connection reliability, thereby improving the reliability and stability of the second swing arm 60 in the transition between the unfolded state and the folded state.

[0202] In another possible implementation, referring to FIG. 12 to FIG. 17 , the rotating shaft mechanism 100 further includes a third rotating shaft 53 , and the second swing arm 60 is rotatably connected to the base 10 via the third rotating shaft 53 .

[0203] It can be understood that the third rotating shaft 53 can be a rotating shaft that is separately molded from the second swing arm 60 and the base 10. The second swing arm 60 and the base 10 can be respectively provided with rotating shaft holes. The third rotating shaft 53 can be passed through the rotating shaft hole on the second swing arm 60 and the rotating shaft hole on the base 10 to realize the rotational connection between the second swing arm 60 and the base 10. This situation is exemplarily shown in Figures 12 and 14.

[0204] Of course, the third rotating shaft 53 can also be a one-piece structure integrally formed with the second swing arm 60, with a rotating shaft hole being provided on the base 10, and the third rotating shaft 53 rotatably engaged with the rotating shaft hole on the base 10. Similarly, the third rotating shaft 53 can also be a one-piece structure integrally formed with the base 10, with a rotating shaft hole being provided on the second swing arm 60, and the third rotating shaft 53 rotatably engaged with the rotating shaft hole on the second swing arm 60.

[0205] With this arrangement, the second swing arm 60 and the base 10 are rotationally connected via a physical axis, which can improve connection reliability compared to a virtual axis connection, thereby improving the reliability of the rotation axis mechanism 100 in switching between the unfolded state and the folded state.

[0206] In the above embodiments, the first swing arm 30 is described as a synchronous swing arm, but the first swing arm 30 is not limited to a synchronous swing arm. Below, the case where the first swing arm 30 is a main swing arm will be described as an example.

[0207] Please refer to Figures 18 to 20. Figure 18 shows a schematic diagram of the three-dimensional structure of the rotating shaft mechanism 100 in the unfolded state provided in some embodiments of the present application. Figure 19 shows a schematic diagram of the three-dimensional structure of the rotating shaft mechanism 100 shown in Figure 18 in the folded state. Figure 20 shows an exploded view of the rotating shaft mechanism 100 shown in Figure 18.

[0208] In some embodiments, the first swing arm 30 is a main swing arm, rather than a synchronous swing arm or auxiliary swing arm. Because the first swing arm 30 is rotationally connected to the connector 20 via the sliding engagement of the first arc-shaped sliding portion 301 and the first arc-shaped sliding engagement portion 201, the angle through which the first swing arm 30, serving as the main swing arm, rotates from the unfolded state to the folded state can be less than 90°. This reduces the possibility of interference between the main swing arm and the folding screen 2000 in the folded state, facilitating further miniaturization of the hinge mechanism 100 and, in turn, a slimmer and lighter design of the terminal device 10000.

[0209] Optionally, in some embodiments, referring to Figures 18 to 20 , the hinge mechanism 100 further includes at least two third swing arms 61, which are disposed on either side of the base 10 and rotatably connected to the base 10. The third swing arms 61 on the same side of the base 10 are slidably connected to the connector 20.

[0210] It can be understood that the third swing arm 61 is arranged on both sides of the base 10, which means that the third swing arm 61 is provided on both sides of the base 10, but the number of third swing arms 61 on each side can be one or more, and the number of third swing arms 61 on both sides of the base 10 can be the same or different.

[0211] The third swing arm 61 can be connected to the base 10 through various rotational connection methods, so that the third swing arm 61 can rotate relative to the base 10 while being connected to the base 10. The rotation axes of each third swing arm 61 relative to the base 10 can be arranged substantially parallel, although some deviation is possible, but close to parallel, to allow for manufacturing and assembly errors. The rotation axes of the third swing arm 61 relative to the base 10 can be substantially parallel to the longitudinal direction of the base 10.

[0212] The third swing arm 61 can have various shapes and structures and can be configured according to actual needs, and is not limited in the present embodiment. The primary function of the third swing arms 61 on both sides of the base 10 is to rotate relative to the base 10. For ease of description, they are both referred to as third swing arms. However, the shapes and structures of the third swing arms 61 on both sides of the base 10 can be the same or different.

[0213] With this arrangement, the third swing arm 61 can be regarded as a synchronous swing arm or an auxiliary swing arm, and the connecting member 20 is rotatably connected to the base 10 through the first swing arm 30 and the third swing arm 61, which is beneficial to improving the stability of the rotating shaft mechanism 100 in the transition between the unfolded state and the folded state.

[0214] Optionally, referring to FIG. 18 , the third swing arms 61 on both sides of the base 10 may be connected via a synchronization component. The synchronization component may adopt a structure that is the same as or similar to the synchronization component 41 described in the above embodiment, and will not be described in detail here.

[0215] 18 , a damping assembly may be provided in connection with the third swing arm 61 to provide a damping force for the third swing arm 61. The damping assembly may have the same or similar structure as the damping assembly 42 described in the above embodiment, and will not be described in detail here.

[0216] Alternatively, referring to Figures 18 to 20 , one of the third swing arm 61 and the connector 20, located on the same side of the base 10, is provided with a second sliding portion 604, and the other is provided with a second straight slide groove 204. The second sliding portion 604 slidably engages with the second straight slide groove 204. Figures 18 and 20 exemplify the case where the third swing arm 61 is provided with the second sliding portion 604 and the connector 20 is provided with the second straight slide groove 204. Of course, the two can also be reversed.

[0217] It is understood that the second sliding portion 604 can have various regular or irregular shapes, such as a plate-like structure (which is exemplarily shown in FIG. 20 ), a sheet-like structure, a block-like structure, etc., but is not limited thereto, as long as it can cooperate with the second straight slide groove 204 so that the two can slide relative to each other along a substantially straight path. The second straight slide groove 204 is a slide groove having a straight path, so that the second sliding portion 604 slides within the second straight slide groove 204 along a substantially straight path.

[0218] With this arrangement, when the hinge mechanism 100 switches between the unfolded state and the folded state, the connecting member 20 and the third swing arm 61 rotate synchronously, and the second sliding portion 604 slides in the second straight sliding groove 204 .

[0219] Optionally, referring to FIG. 18 and FIG. 20 , the rotating shaft mechanism 100 further includes a fourth rotating shaft 54 ​​, and the first swing arm 30 and the base 10 are rotatably connected via the fourth rotating shaft 54 ​​.

[0220] It can be understood that the fourth rotating shaft 54 ​​can be a rotating shaft that is separately molded from the first swing arm 30 and the base 10. The first swing arm 30 and the base 10 can be respectively provided with rotating shaft holes. The fourth rotating shaft 54 ​​can be passed through the rotating shaft hole on the first swing arm 30 and the rotating shaft hole on the base 10 to realize the rotational connection between the first swing arm 30 and the base 10. This situation is exemplarily shown in Figure 20.

[0221] Of course, the fourth rotating shaft 54 ​​can also be an integral structure integrally formed with the first swing arm 30, with a rotating shaft hole being provided on the base 10, and the fourth rotating shaft 54 ​​rotatably engaged with the rotating shaft hole on the base 10. Similarly, the fourth rotating shaft 54 ​​can also be an integral structure integrally formed with the base 10, with a rotating shaft hole being provided on the first swing arm 30, and the fourth rotating shaft 54 ​​rotatably engaged with the rotating shaft hole on the first swing arm 30.

[0222] With this arrangement, the first swing arm 30 and the base 10 are rotationally connected via a physical axis, which can improve connection reliability compared to a virtual axis connection, thereby improving the reliability of the rotation axis mechanism 100 in switching between the unfolded state and the folded state.

[0223] Optionally, the third swing arm 61 and the base 10 may also be rotatably connected via a physical axis to improve connection reliability.

[0224] Please refer to Figures 7, 9, 11, and 18. In order to provide more accommodation space for the foldable portion 2100 of the foldable screen 2000 when the hinge mechanism 100 is in the folded state, in some embodiments, a curved surface 310 is recessed on the first swing arm 30. When the hinge mechanism 100 is in the folded state, the curved surface 310 on the first swing arm 30 on one side of the base 10 faces the first swing arm 30 on the other side of the base 10. In other words, the curved surfaces 310 on the first swing arms 30 on both sides of the base 10 are arranged facing each other, so that an accommodation space for accommodating the foldable portion 2100 can be formed between the curved surfaces 310 on the first swing arms 30 on both sides of the base 10, which can further reduce the possibility of interference with the foldable portion 2100.

[0225] In some embodiments, referring to Figures 7 to 17 , the hinge mechanism 100 further includes at least two fourth swing arms 70, each disposed on either side of the base 10. The fourth swing arms 70 are rotatably connected to the connector 20 located on the same side of the base 10. One of the fourth swing arm 70 and the first swing arm 30, located on the same side of the base 10, is provided with a track groove 701, and the other is provided with a sliding body 302, which is in high-pair engagement with the track groove 701. Figure 11 exemplarily illustrates a case where the fourth swing arm 70 is provided with the track groove 701 and the first swing arm 30 is provided with the sliding body 302.

[0226] It is understood that the fourth swing arm 70 being provided on both sides of the base 10 means that the fourth swing arm 70 is provided on both sides of the base 10, but the number of fourth swing arms 70 on each side may be one or more, and the number of fourth swing arms 70 on both sides of the base 10 may be the same or different. The fourth swing arm 70 can be connected to the connecting member 20 located on the same side of the base 10 by various rotational connection methods.

[0227] The high-pair fit between the sliding body 302 and the track groove 701 means that the sliding body 302 makes point contact or line contact with the groove wall of the track groove 701, so that the sliding body 302 can slide along the groove wall of the track groove 701 and rotate within the track groove 701. The sliding body 302 can have various regular or irregular structures, such as a columnar structure (such a case is exemplarily shown in Figure 11), a rod-like structure, a plate-like structure, etc., but is not limited to these. The sliding body 302 can be a one-piece structure integrally formed with one of the fourth swing arm 70 and the first swing arm 30 to which it is connected, or it can be separately formed and connected. Figure 11 exemplarily shows a case where the sliding body 302 is provided on the first swing arm 30 and both are an integrated structure.

[0228] With this arrangement, when the hinge mechanism 100 transitions between the deployed state and the folded state, the sliding body 302 can slide and rotate within the track groove 701, the fourth swing arm 70 can slide and rotate relative to the first swing arm 30, and the fourth swing arm 70 can rotate relative to the connecting member 20 to facilitate controlling the movement of the fourth swing arm 70. When the hinge mechanism 100 is applied to the terminal device 10000, the support member provided on the fourth swing arm 70 can move simultaneously with the fourth swing arm 70, so that the support member supports the foldable portion 2100 of the foldable screen 2000 in the deployed state, and the support member surrounds and forms a storage space for accommodating the foldable portion 2100 in the folded state.

[0229] For example, referring to Figures 9 and 10, when the hinge mechanism 100 is transformed from the unfolded state to the folded state, among the first swing arm 30, the fourth swing arm 70 and the connecting member 20 located on the same side of the base 10, the first swing arm 30 rotates relative to the connecting member 20, and the first swing arm 30 and the fourth swing arm 70 slide and rotate relative to each other, that is, while the first swing arm 30 rotates relative to the connecting member 20, the fourth swing arm 70 is driven to slide and rotate relative to the first swing arm 30 (because the fourth swing arm 70 is rotatably connected to the connecting member 20, the fourth swing arm 70 is rotated relative to the first swing arm 30). Relative to the first swing arm 30, it is not easy to get stuck when sliding and rotating), so that when the hinge mechanism 100 is in the folded state, the fourth swing arms 70 located on both sides of the base 10 are relatively arranged and form an angle a (the angle a is greater than 0° and less than 180°, for example, it can be an acute angle, a right angle, or an obtuse angle), and the distance between the fourth swing arms 70 located on both sides of the base 10 close to the edge of the base 10 is a first distance, and the distance between the fourth swing arms 70 located on both sides of the base 10 away from the edge of the base 10 is a second distance, and the first distance is greater than the second distance. In this way, when a support is provided on the fourth swing arm 70, when the terminal device 10000 is in the folded state, the support can make the foldable portion 2100 of the folding screen 2000 have a teardrop shape.

[0230] Optionally, in some embodiments, please refer to Figures 7 and 11, in the fourth swing arm 70 and the connecting member 20 located on the same side of the base 10, the fourth swing arm 70 is provided with a fourth arc-shaped sliding portion 702, and the connecting member 20 is provided with a fourth arc-shaped sliding fitting portion 205, and the fourth arc-shaped sliding portion 702 is slidably fitted with the fourth arc-shaped sliding fitting portion 205 to enable the fourth swing arm 70 to be rotatably connected to the connecting member 20.

[0231] The fourth arcuate sliding portion 702 and the fourth arcuate sliding mating portion 205 slide relative to each other along an arcuate trajectory to achieve relative rotation. Both the fourth arcuate sliding portion 702 and the fourth arcuate sliding mating portion 205 are arcuate structures and can be of various shapes, as long as they can engage and mate with each other in relative sliding along an arcuate trajectory. The fourth arcuate sliding portion 702 and the fourth swing arm 70 can be integrally formed as a one-piece structure, or they can be formed as separate pieces and fixedly connected. Similarly, the fourth arcuate sliding mating portion 205 and the connecting member 20 can be integrally formed as a one-piece structure, or they can be formed as separate pieces and fixedly connected.

[0232] With this arrangement, the fourth swing arm 70 and the connecting member 20 can be regarded as being rotationally connected via a virtual axis, which is beneficial for reducing the overall size formed by the fourth swing arm 70 and the connecting member 20 while obtaining the required rotation radius, and has better rotational fit stability.

[0233] Optionally, one of the fourth arcuate sliding portion 702 and the fourth arcuate sliding fitting portion 205 is a circular arcuate slide rail, and the other is a circular arcuate slot. FIG11 exemplifies the case where the fourth arcuate sliding portion 702 is a circular arcuate slide rail and the fourth arcuate sliding fitting portion 205 is a circular arcuate slot. Of course, the two can also be reversed. The surface contact between the fourth arcuate sliding portion 702 and the fourth arcuate sliding fitting portion 205, compared to point contact or line contact, helps improve the stability and reliability of the relative sliding between the fourth arcuate sliding portion 702 and the fourth arcuate sliding fitting portion 205, thereby improving the stability of the rotational fit between the fourth swing arm 70 and the connecting member 20.

[0234] Optionally, the hinge mechanism 100 further includes a support member connected to the fourth swing arm 70 so as to move along with the movement of the fourth swing arm 70. When the hinge mechanism 100 is in the folded state, the support member is located between the first swing arms 30 located on both sides of the base 10.

[0235] It can be understood that the support member is a structural member used to support the foldable portion 2100 of the folding screen 2000 and can shape the foldable portion 2100 in the folded state. It can be a structure of various shapes, for example, it can be a plate-like structure or a sheet-like structure, so as to facilitate the formation of a support surface with a certain area, which can better support the foldable portion 2100. Of course, it can also be a structure of other shapes. The support member can be a rigid support member. In this case, the number of support members can be multiple, and they are respectively located on both sides of the base 10. The support member and the fourth swing arm 70 located on the same side of the base 10 can be fixedly connected. In this case, the support member is also called a door panel. Of course, the support member can also be a flexible support member so as to be able to bend. In this case, the number of support members can be one, and the two sides of the support member are respectively fixedly connected to the fourth swing arm 70 on both sides of the base 10.

[0236] When the terminal device 10000 is in the unfolded state, the support member can be generally flat to support the flat foldable portion 2100 of the foldable screen 2000. When the terminal device 10000 is in the folded state, the inner side of the support member can form an accommodating space for the foldable portion 2100. The support member is located between the foldable portion 2100 and the first swing arm 30.

[0237] Optionally, in some embodiments, referring to Figures 7 and 11 , the first swing arm 30 includes a first arm portion 31 and at least two second arm portions 32. The first arm portion 31 is rotatably connected to the base 10. The second arm portions 32 are connected to the first arm portion 31 and are sequentially arranged along the axis of rotation of the first arm portion 31 relative to the base 10. Specifically, in the first swing arm 30 and the connecting member 20 located on the same side of the base 10, the second arm portion 32 of the first swing arm 30 is provided with a first arc-shaped sliding portion 301, and the connecting member 20 is provided with a plurality of first arc-shaped sliding mating portions 201. The first arc-shaped sliding portions 301 are slidably mated with the first arc-shaped sliding mating portions 201 in a one-to-one correspondence. Each pair of slidingly fitting first arc-shaped sliding parts 301 and first arc-shaped sliding fitting parts 201 can form a sliding fitting group, and the first swing arm 30 and the connecting member 20 can be slidingly fitted through multiple sets of sliding fitting groups, which is beneficial to improving the reliability of the rotational connection between the first swing arm 30 and the connecting member 20, and thereby improving the reliability of the rotating shaft mechanism 100.

[0238] Alternatively, referring to Figures 7 and 11 , in the fourth swing arm 70 and the first swing arm 30 located on the same side of the base 10, the fourth swing arm 70 is located between two adjacent second arm portions 32 of the first swing arm 30. This not only makes the second arm portion 32 and the fourth swing arm 70 on the same side of the base 10 more evenly arranged, thereby improving the stability of the first and fourth swing arms 30 and 70 during rotation, but also helps to improve the structural compactness.

[0239] It should be noted that in other embodiments, as shown in Figures 18 to 20 , when the first swing arm 30 serves as the primary swing arm, a fourth swing arm 70 may be disposed between the third swing arm 61 and the connector 20. Specifically, the fourth swing arm 70 is rotatably connected to the connector 20 located on the same side of the base 10. The fourth swing arm 70 and the third swing arm 61 located on the same side of the base 10 may be engaged via a track groove and a high-pair sliding member. This also enables control of the movement of the fourth swing arm 70.

[0240] The above is only a specific implementation method of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed in this application, which should be covered by the protection scope of the present application.

Claims

1. A rotating shaft mechanism, characterized in that: The rotating shaft mechanism comprises: Base; At least two connecting members are disposed on two sides of the base; and At least two first swing arms are respectively arranged on two sides of the base, and the first swing arms are rotatably connected to the base; Among them, in the first swing arm and the connecting member located on the same side of the base, the first swing arm is provided with a first arc-shaped sliding portion, and the connecting member is provided with a first arc-shaped sliding matching portion, and the first arc-shaped sliding portion is slidingly matched with the first arc-shaped sliding matching portion to make the first swing arm and the connecting member rotatably connected.

2. The rotating shaft mechanism according to claim 1, characterized in that: The connecting members located on both sides of the base can rotate relative to each other based on the base, so that the rotating shaft mechanism is converted between the unfolded state and the folded state; when the rotating shaft mechanism is converted from the unfolded state to the folded state, the connecting member drives the first swing arm to rotate relative to the base, and the first arc-shaped sliding portion and the first arc-shaped sliding matching portion slide relative to each other, so that the connecting member and the first swing arm rotate relative to each other; Wherein, when the hinge mechanism is transformed from the unfolded state to the folded state, the rotation angle of the first swing arm relative to the base is less than 90°.

3. The rotating shaft mechanism according to claim 1 or 2, characterized in that: One of the first arc-shaped sliding portion and the first arc-shaped sliding fitting portion is an arc-shaped sliding rail, and the other is an arc-shaped sliding groove; the first arc-shaped sliding portion is in surface contact with the first arc-shaped sliding fitting portion.

4. The rotating shaft mechanism according to any one of claims 1 to 3, characterized in that: The first swing arm is a synchronous swing arm.

5. The rotating shaft mechanism according to claim 4, characterized in that: The rotating shaft mechanism also includes a synchronization component, and the first swing arms located on both sides of the base are connected through the synchronization component.

6. The rotating shaft mechanism according to any one of claims 4 to 5, characterized in that: The rotating shaft mechanism also includes a damping component, which is connected to the first swing arm and is used to provide a damping force for the first swing arm.

7. The rotating shaft mechanism according to any one of claims 4 to 6, characterized in that: The rotating shaft mechanism also includes a first rotating shaft, and the first swing arm is rotatably connected to the base via the first rotating shaft.

8. The rotating shaft mechanism according to any one of claims 4 to 7, characterized in that: The pivot mechanism further includes at least two second swing arms, which are disposed on both sides of the base and are rotatably connected to the base; wherein the second swing arms located on the same side of the base are rotatably connected to the connecting member.

9. The rotating shaft mechanism according to claim 8, characterized in that: The rotating shaft mechanism also includes a second rotating shaft, and the second swing arm and the connecting member located on the same side of the base are rotatably connected via the second rotating shaft.

10. The rotating shaft mechanism according to claim 8, characterized in that: In the second swing arm and the connecting member located on the same side of the base, the second swing arm is provided with a second arc-shaped sliding portion, and the connecting member is provided with a second arc-shaped sliding matching portion. The second arc-shaped sliding portion is slidably matched with the second arc-shaped sliding matching portion to enable the second swing arm to be rotatably connected with the connecting member.

11. The rotating shaft mechanism according to claim 10, characterized in that: The connecting members located on both sides of the base can rotate relative to each other based on the base, so that the rotating shaft mechanism is converted between the unfolded state and the folded state; when the rotating shaft mechanism is converted from the unfolded state to the folded state, the connecting member drives the first swing arm and the second swing arm to rotate relative to the base, and the first arc-shaped sliding portion slides relative to the first arc-shaped sliding matching portion, so that the connecting member and the first swing arm rotate relative to each other, and the second arc-shaped sliding portion slides relative to the second arc-shaped sliding matching portion, so that the connecting member and the second swing arm rotate relative to each other; Wherein, when the hinge mechanism is transformed from the unfolded state to the folded state, the rotation angle of the second swing arm relative to the base is less than 90°.

12. The rotating shaft mechanism according to claim 10 or 11, characterized in that: One of the second arc-shaped sliding portion and the second arc-shaped sliding fitting portion is an arc-shaped sliding rail, and the other is an arc-shaped sliding groove; the second arc-shaped sliding portion is in surface contact with the second arc-shaped sliding fitting portion.

13. The rotating shaft mechanism according to any one of claims 4 to 7, characterized in that: The pivot mechanism further includes at least two second swing arms, which are disposed on both sides of the base and are rotatably connected to the base; wherein the second swing arms located on the same side of the base are slidably connected to the connecting member.

14. The rotating shaft mechanism according to claim 13, characterized in that: A first sliding portion is provided on one of the second swing arm and the connecting member located on the same side of the base, and a first straight sliding groove is provided on the other, and the first sliding portion is slidably matched with the first straight sliding groove.

15. The rotating shaft mechanism according to any one of claims 8 to 14, characterized in that: The second swing arm is provided with a third arc-shaped sliding portion, and the base is provided with a third arc-shaped sliding matching portion. The third arc-shaped sliding portion is slidably matched with the third arc-shaped sliding matching portion, so that the second swing arm is rotatably connected to the base.

16. The rotating shaft mechanism according to claim 15, characterized in that: One of the third arc-shaped sliding portion and the third arc-shaped sliding fitting portion is an arc-shaped sliding rail, and the other is an arc-shaped sliding groove; the third arc-shaped sliding portion is in surface contact with the third arc-shaped sliding fitting portion.

17. The rotating shaft mechanism according to any one of claims 8 to 14, characterized in that: The rotating shaft mechanism also includes a third rotating shaft, and the second swing arm is rotatably connected to the base via the third rotating shaft.

18. The rotating shaft mechanism according to any one of claims 1 to 3, characterized in that: The first swing arm is a main swing arm.

19. The rotating shaft mechanism according to claim 18, characterized in that: The pivot mechanism also includes at least two third swing arms, which are respectively arranged on both sides of the base and rotatably connected to the base; wherein the third swing arms located on the same side of the base are slidably connected to the connecting member.

20. The rotating shaft mechanism according to claim 19, characterized in that: A second sliding portion is provided on one of the third swing arm and the connecting member located on the same side of the base, and a second straight sliding groove is provided on the other, and the second sliding portion is slidably matched with the second straight sliding groove.

21. The rotating shaft mechanism according to any one of claims 18 to 20, characterized in that: The rotating shaft mechanism also includes a fourth rotating shaft, and the first swing arm is rotatably connected to the base via the fourth rotating shaft.

22. The rotating shaft mechanism according to any one of claims 1 to 21, characterized in that: The connecting members located on both sides of the base can rotate relative to each other based on the base, so that the rotating shaft mechanism can be converted between the unfolded state and the folded state; An arcuate surface is concavely provided on the first swing arm; when the hinge mechanism is in the folded state, the arcuate surface on the first swing arm on one side of the base faces the first swing arm on the other side of the base.

23. The rotating shaft mechanism according to any one of claims 1 to 22, characterized in that: The rotating shaft mechanism also includes at least two fourth swing arms, which are respectively arranged on both sides of the base; the fourth swing arms are rotatably connected to the connecting member located on the same side of the base; one of the fourth swing arm and the first swing arm located on the same side of the base is provided with a track groove, and the other is provided with a sliding body, and the sliding body is high-paired with the track groove.

24. The rotating shaft mechanism according to claim 23, characterized in that: In the fourth swing arm and the connecting member located on the same side of the base, the fourth swing arm is provided with a fourth arc-shaped sliding portion, and the connecting member is provided with a fourth arc-shaped sliding matching portion. The fourth arc-shaped sliding portion is slidably matched with the fourth arc-shaped sliding matching portion to enable the fourth swing arm to be rotatably connected to the connecting member.

25. The rotating shaft mechanism according to claim 23 or 24, characterized in that: The rotating shaft mechanism further includes a support member, and the support member is connected to the fourth swing arm; The connecting members located on both sides of the base can rotate relative to each other based on the base so that the hinge mechanism can be converted between the unfolded state and the folded state; when the hinge mechanism is in the folded state, the supporting member is located between the first swing arms located on both sides of the base.

26. The rotating shaft mechanism according to any one of claims 23 to 25, characterized in that: The first swing arm comprises: A first arm portion rotatably connected to the base; and At least two second arms connected to the first arm and arranged in sequence along the direction of the rotation axis of the first arm; Among them, in the first swing arm and the connecting member located on the same side of the base, the second arm portion of the first swing arm is provided with the first arc-shaped sliding portion, and the connecting member is provided with a plurality of the first arc-shaped sliding matching portions, and the first arc-shaped sliding portion is slidably matched with the first arc-shaped sliding matching portions in a one-to-one correspondence; In the fourth swing arm and the first swing arm located on the same side of the base, the fourth swing arm is located between two adjacent second arm portions of the first swing arm.

27. A terminal device, characterized in that: The terminal device comprises: A folding device, comprising a first shell, a second shell and a hinge mechanism according to any one of claims 1 to 26; the first shell is connected to the connecting member on one side of the base, and the second shell is connected to the connecting member on the other side of the base; and A folding screen is arranged on the first shell and the second shell, and the position of the foldable part of the folding screen corresponds to the position of the rotating shaft mechanism.

Images