Rotating shaft mechanism and electronic device

Abstract

Embodiments of the present application relate to the technical field of electronic devices, and provide a rotating shaft mechanism and an electronic device, used for providing a relatively thin rotating shaft mechanism. The rotating shaft mechanism comprises: an inner shaft, a rotating assembly capable of rotating relative to the inner shaft, and an outer shaft. The inner shaft is connected to the outer shaft, and the rotating assembly is located between the inner shaft and the outer shaft. The rotating assembly comprises a first swing arm, a second swing arm and a linkage structure, and the first swing arm and the second swing arm can rotate relative to the inner shaft. The linkage structure comprises a rotating member, a first translation member and a second translation member. The first swing arm and the second swing arm can drive the first translation member and the second translation member to move reversely, and the rotating member can synchronize the movement of the first translation member and the second translation member. The rotating member is horizontally placed, and the axial direction of the rotating member is the thickness direction of the rotating shaft mechanism. A flat rotating shaft mechanism can be obtained simply by adjusting the thickness of a rotating member, which is not limited by the axial size of the rotating member.

Description

Rotating shaft mechanism and electronic equipment

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on July 25, 2023, with application number 202310921643.9 and application name “Hinge Mechanism and Electronic Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of electronic equipment, and in particular to a rotating shaft mechanism and electronic equipment. Background Art

[0003] Flexible screens are the development trend of the display industry. Foldable electronic devices have also become the focus in recent years, and mobile phone manufacturers have also launched foldable phones one after another.

[0004] A foldable electronic device includes a housing, a hinge mechanism, and a flexible screen. The housing includes a left housing and a right housing that are separately arranged. The hinge mechanism is located between the left and right housings, and the flexible screen is installed on the left and right housings. When the left and right housings are folded under the drive of the hinge mechanism, the flexible screen can be folded to put the electronic device in a folded state. In this folded state, the electronic device is smaller and easier to store. When the left and right housings are unfolded under the drive of the hinge mechanism, the flexible screen can be unfolded to put the electronic device in an unfolded state. In this unfolded state, the display screen of the electronic device is larger, which can improve the user experience. Therefore, the hinge mechanism is a key component of a foldable electronic device.

[0005] As electronic devices continue to become thinner and lighter, the hinge mechanism also needs to continue to develop towards a flatter shape.

[0006] Summary of the Invention

[0007] An embodiment of the present application provides a hinge mechanism and an electronic device having the hinge mechanism, which is used to provide a hinge mechanism with a relatively thin thickness.

[0008] To achieve the above objectives, this application adopts the following technical solutions:

[0009] According to a first aspect of an embodiment of the present application, a hinge mechanism is provided, which can be used in a foldable electronic device with a flexible screen, for example, in a foldable screen mobile phone, a foldable screen tablet computer, and other devices.

[0010] The rotating shaft mechanism includes: an inner shaft and an outer shaft that are detachably connected, and a rotating assembly located between the inner shaft and the outer shaft and capable of rotating relative to the inner shaft. The rotating assembly includes a first swing arm, a second swing arm, and a linkage structure. The first swing arm and the second swing arm can, for example, rotate relative to or away from each other along the rotation axis of the rotating shaft mechanism so that the rotating shaft mechanism switches between a flattened state and a folded state. The first swing arm and the second swing arm rotate relative to each other, and the rotating shaft mechanism switches to a folded state. The first swing arm and the second swing arm rotate away from each other, and the rotating shaft mechanism switches to a flattened state. The linkage structure includes a rotating member, a first translation member, and a second translation member. The first translation member is slidably connected to the inner shaft and is engaged with the first swing arm; the second translation member is slidably connected to the inner shaft and is engaged with the second swing arm; the rotating member connects the first translation member and the second translation member and is rotatably connected to the inner shaft. The rotating member is placed horizontally, and the rotation axis of the rotating member is parallel to a first direction, which is the direction from the inner shaft to the outer shaft. During the transition of the hinge mechanism from the flattened state to the folded state, the first and second swing arms rotate relative to each other along the hinge mechanism's rotation axis, driving the first and second translating members to slide in opposite directions parallel to a second direction. The sliding of the first and second translating members drives the rotating member to rotate; the second direction intersects both the rotation axis and the first direction, and the first direction is perpendicular to the rotation axis.

[0011] The embodiment of the present application provides a rotating shaft mechanism, and the linkage structure includes a first translation member, a second translation member, and a rotating member. The first translation member and the second translation member always move along the width direction (second direction) of the rotating shaft mechanism, and the dimension requirement of the first translation member and the second translation member in the thickness direction (first direction) of the rotating shaft mechanism is the dimension of the thickness of the first translation member and the second translation member themselves. Synchronously, the axial direction of the rotating member is the thickness direction of the rotating shaft mechanism. In other words, the rotating member is placed horizontally in the rotating shaft mechanism. Then, the dimension requirement of the rotating member in the thickness direction of the rotating shaft mechanism is also the thickness of the rotating member itself in the axial direction. Compared with the radial direction of the rotating member in the linkage structure being parallel to the thickness direction, and the requirement of the linkage structure in the thickness direction being at least the outer diameter of the linkage structure, the thickness requirement of the linkage structure provided by the embodiment of the present application is significantly reduced, and it is adapted to the flat space of the rotating shaft mechanism, with a simple structure, small dead space, and a thin thickness of the rotating shaft mechanism.

[0012] In one possible implementation, the first swing arm includes a first rotating member and a first flat plate fixedly connected; the second swing arm includes a second rotating member and a second flat plate fixedly connected; along the direction of the rotation axis, the first rotating member and the second rotating member are located on either side of the linkage structure; along the second direction, the first flat plate and the second flat plate are located on either side of the linkage structure; the first flat plate can drive the first rotating member to rotate relative to the inner shaft; and the second flat plate can drive the second rotating member to rotate relative to the inner shaft. The swing arm structure, comprising the rotating member and the flat plate, is simple and easy to implement.

[0013] In one possible implementation, the first translation member includes a first recessed portion that is concave away from the first rotating member, and the first rotating member includes a first protruding portion that protrudes toward the first translation member. The first protruding portion is cooperatively connected with the first recessed portion to achieve the movement of the first translation member during the rotation of the first rotating member.

[0014] That is to say, the first protrusion and the first recess are connected in cooperation so that the first rotating member drives the first translation member to move along the second direction. This connection method of the protrusion and the recess has a simple structure and occupies little space.

[0015] In one possible implementation, the second translation member includes a second recessed portion that is concave away from the fourth rotating member, and the fourth rotating member includes a second protruding portion that protrudes toward the second translation member. The second protruding portion is cooperatively connected with the second recessed portion to achieve the movement of the second translation member during the rotation of the fourth rotating member.

[0016] That is to say, the second protrusion and the second recess are connected in cooperation so that the fourth rotating member drives the second translation member to move along the second direction. This connection method of the protrusion and the recess has a simple structure and occupies little space.

[0017] In a possible implementation, the first protrusion is located at an end of the first rotating member away from the first swing arm, and the first recess is located at an end of the first translation member close to the first swing arm.

[0018] That is, the first protrusion is provided at the inner end of the first rotating member, and the first recess is provided at the outer end of the first translating member. This allows the first translating member to move a greater amount during the folding process of the hinge mechanism, enabling full-angle rotation of the first rotating member with a more compact structure. This also requires less space in the second direction of the hinge mechanism, thus contributing to a more compact hinge mechanism.

[0019] In a possible implementation, the second protrusion is located at an end of the fourth rotating member away from the second swing arm, and the second recess is located at an end of the second translation member close to the second swing arm.

[0020] That is, the second protrusion is provided at the inner end of the fourth rotating member, and the second recess is provided at the outer end of the second translatory member. This allows the second translatory member to move a greater amount during the folding of the hinge mechanism, enabling full-angle rotation of the fourth rotating member with a more compact structure. This also requires less space in the second direction of the hinge mechanism, thus contributing to a more compact hinge mechanism.

[0021] In one possible implementation, the first swing arm further includes a third rotating member, which is fixedly connected to the first plate and disposed oppositely to the first rotating member on opposite sides of the linkage structure; the first plate can also drive the third rotating member to rotate relative to the inner shaft. The second swing arm further includes a fourth rotating member, which is fixedly connected to the second plate and disposed oppositely to the second rotating member on opposite sides of the linkage structure; the second plate can also drive the fourth rotating member to rotate relative to the inner shaft.

[0022] That is to say, each flat plate is connected to two rotating members, and the first swing arm and the second swing arm are symmetrically arranged. In this way, the support stability of the flat plate is strong and the symmetry of the rotating mechanism is improved.

[0023] In a possible implementation, the rotating member includes a gear, the first rotating member includes a first rack, the second rotating member includes a second rack, and the first rack and the second rack are respectively engaged with the gear.

[0024] That is to say, the first translation member and the second translation member rotate synchronously through the transmission cooperation of the gear and the rack. This meshing transmission structure has a simple structure, occupies a small space, and has relatively stable transmission.

[0025] In a possible implementation, a first guide portion is provided on a side of the inner shaft facing the linkage structure, and the first guide portion can guide the first translation member to move in a direction parallel to the second direction.

[0026] By providing the first guide portion, the first translation member can move linearly along the second direction in a balanced and stable manner.

[0027] In a possible implementation, a second guide portion is provided on a side of the inner shaft facing the linkage structure, and the second guide portion can guide the second translation member to move in a direction parallel to the second direction.

[0028] By providing the second guide portion, the second translation member can move linearly along the second direction in a balanced and stable manner.

[0029] In a possible implementation, the first guide portion includes a first guide groove and a first guide protrusion extending along the second direction; the first guide groove and the first guide protrusion are sequentially arranged along the second direction.

[0030] A portion of the first guide portion is a first guide groove, and a portion is a first guide protrusion, which can prevent the inner shaft from being thinned too much at the position where the first conductive portion is provided, thereby preventing the rigidity of the inner shaft from being affected.

[0031] In a possible implementation, the first guide groove is disposed close to the first flat plate and adjacent to the first rotating member; the first guide protrusion is disposed close to the second flat plate and adjacent to the second rotating member.

[0032] That is, the first guide portion is correspondingly provided as a first guide groove in the area where the first protrusion moves in the first rotating member to avoid the first protrusion, thereby reducing the blocking effect of the first guide portion on the movement of the first protrusion.

[0033] In a possible implementation, the second guide portion includes a second guide groove and a second guide protrusion extending along the second direction, and the second guide groove and the second guide protrusion are sequentially arranged along the second direction.

[0034] A portion of the second guide portion is a second guide groove, and a portion is a second guide protrusion, which can prevent the inner shaft from being thinned too much at the position where the second conductive portion is provided, thereby preventing the rigidity of the inner shaft from being affected.

[0035] In a possible implementation, the second guide groove is disposed close to the second flat plate and adjacent to the fourth rotating member, and the second guide protrusion is disposed close to the first flat plate and adjacent to the third rotating member.

[0036] That is, the second guide portion is correspondingly provided as a second guide groove in the area where the second protrusion moves in the fourth rotating member to avoid the second protrusion, thereby reducing the blocking effect of the second guide portion on the movement of the second protrusion.

[0037] In one possible implementation, a first limiting portion and a second limiting portion are provided on the side of the inner shaft facing the linkage structure; along the second direction, the first limiting portion and the second limiting portion are located on both sides of the rotating member; the surfaces of the first limiting portion and the second limiting portion facing the rotating member are arc surfaces and are slidingly connected to the rotating member.

[0038] In this way, the first limiting portion and the second limiting portion match the rotation trajectory of the rotating member and confine the rotating member therebetween, thereby limiting the rotation trajectory of the rotating member.

[0039] In a possible implementation manner, a surface of the inner shaft facing away from the rotating assembly is a plane.

[0040] When the hinge mechanism is applied to an electronic device, the display screen of the electronic device is placed on the surface of the inner shaft. By setting the surface of the inner shaft as a flat surface, the hinge mechanism has a flat support at all times during the folding process, protecting the display screen and improving screen reliability.

[0041] In one possible implementation, the rotating shaft mechanism also includes an outer shaft, and the inner shaft and the outer shaft are connected; the inner shaft has a first arc-shaped protrusion and a second arc-shaped protrusion on the side facing the first rotating member and the second rotating member, and the outer shaft has a first arc-shaped recessed portion and a second arc-shaped recessed portion on the side facing the first rotating member and the second rotating member; the first arc-shaped protrusion and the first arc-shaped recessed portion form a first arc-shaped groove, and the second arc-shaped protrusion and the second arc-shaped recessed portion form a second arc-shaped groove; the first rotating member can move in the first arc-shaped groove, and the second rotating member can move in the second arc-shaped groove.

[0042] That is to say, the first rotating member and the second rotating member both move in the arc groove. Then, the first rotating member and the second rotating member rotate around the axis of the first arc groove and the axis of the second arc groove respectively, and the rotation is stable with small deviation.

[0043] In one possible implementation, the inner shaft has a third arc-shaped protrusion and a fourth arc-shaped protrusion on the side facing the third rotating member and the fourth rotating member, respectively, and the outer shaft has a third arc-shaped recess and a fourth arc-shaped recess; the third arc-shaped protrusion and the third arc-shaped recess form a third arc-shaped groove, and the fourth arc-shaped protrusion and the fourth arc-shaped recess form a fourth arc-shaped groove; the third rotating member can move in the third arc-shaped groove, and the fourth rotating member can move in the fourth arc-shaped groove.

[0044] That is to say, the third rotating member and the fourth rotating member both move in the arc groove. Then, the third rotating member and the fourth rotating member rotate around the axis of the third arc groove and the axis of the fourth arc groove respectively, with stable rotation and small deviation.

[0045] In one possible implementation, the rotating assembly also includes a first damping member, which is slidably connected to the second rotating member and the third rotating member on the side away from the linkage structure; when the first swing arm drives the third rotating member to rotate and the second swing arm drives the second rotating member to rotate, the first damping member is used to apply resistance to the first swing arm and the second swing arm.

[0046] By providing a first damping member in the rotating assembly, the first damping member applies resistance to the first and second swing arms as they rotate, allowing the first and second swing arms to hover when rotating relative to the inner shaft. When the hinge mechanism is applied to an electronic device, the first housing is fixedly connected to the first swing arm, and the second housing is fixedly connected to the second swing arm. This allows the electronic device to hover during folding, improving the user experience.

[0047] In one possible implementation, the third rotating member and the second rotating member have a first cam and a second cam respectively on the side facing away from the linkage structure; the first damping member includes a first connected cam, a first elastic part and a first pin shaft; the first connected cam is sleeved on one end of the first pin shaft close to the linkage structure and engages with the first cam and the second cam; the first connected cam is rotatably installed on the first pin shaft, and the first elastic part is sleeved on the first pin shaft.

[0048] This cam-to-cam engagement and abutment method allows the first damping member to apply resistance of various strengths, and the magnitude of the resistance can be adjusted as needed to meet the requirements of multi-angle hovering of the rotating shaft mechanism.

[0049] In one possible implementation, the rotating assembly also includes a fifth rotating member and a sixth rotating member located on the side of the first damping member away from the linkage structure; the fifth rotating member and the sixth rotating member are arranged side by side along the second direction, the end of the fifth rotating member facing away from the sixth rotating member is connected to the first swing arm, and the end of the sixth rotating member facing away from the fifth rotating member is connected to the second swing arm, and the fifth rotating member and the sixth rotating member can rotate relative to the inner shaft respectively.

[0050] That is to say, each swing arm can be connected to multiple rotating parts, and the multiple rotating parts are reasonably arranged so that the swing arm is evenly stressed and rotates smoothly.

[0051] In one possible implementation, the first swing arm further includes a fifth rotating member, fixedly connected to the first plate and disposed on opposite sides of the first damping member relative to the third rotating member; the first plate can also drive the fifth rotating member to rotate relative to the inner shaft. The second swing arm further includes a sixth rotating member, fixedly connected to the second plate and disposed on opposite sides of the first damping member relative to the second rotating member; the second plate can also drive the sixth rotating member to rotate relative to the inner shaft.

[0052] That is to say, the flat plate in the swing arm is supported by a plurality of rotating parts, which can improve the stability of the flat plate.

[0053] In one possible implementation, the rotating assembly also includes a second damping member; the second damping member is slidably connected to the fifth rotating member and the sixth rotating member on the side close to the first damping member; when the first swing arm drives the fifth rotating member to rotate and the second swing arm drives the sixth rotating member to rotate, the second damping member is used to apply resistance to the first swing arm and the second swing arm.

[0054] That is to say, the rotating assembly may include multiple damping members, and the multiple damping members synchronously apply resistance to the swing arm at multiple positions and angles to improve the stability of the swing arm's hovering.

[0055] In a possible implementation, along the direction from the first side to the second side, the rotating shaft mechanism includes a plurality of rotating components arranged at intervals.

[0056] In other words, the number and layout of the rotating components in the hinge mechanism can be flexibly adjusted in combination with the shape of the electronic device to meet the needs of different application scenarios.

[0057] In a possible implementation, the rotating shaft mechanism further includes a decorative cover, which is located on a side of the rotating assembly away from the inner shaft and is connected to the inner shaft.

[0058] By providing the decorative cover, the internal structure of the rotating shaft mechanism can be hidden regardless of whether the rotating shaft mechanism is in a folded state or a flattened state, thereby improving the appearance of the rotating shaft mechanism.

[0059] According to a second aspect of an embodiment of the present application, an electronic device is provided, comprising: a first shell, a second shell, a flexible screen and a hinge mechanism as described in any one of the first aspects; the first shell is detachably connected to the first swing arm, and the second shell is detachably connected to the second swing arm; the first shell includes a first surface, the second shell includes a second surface, the hinge mechanism includes a third surface located on the side of the inner shaft away from the rotating assembly, the flexible screen continuously covers the first surface, the third surface and the second surface, and the flexible screen is fixedly connected to the first surface of the first shell and the second surface of the second shell, respectively.

[0060] In one possible implementation, the hinge mechanism includes a decorative cover; when the electronic device is flattened, the decorative cover is hidden inside the first shell and the second shell; when the electronic device is folded, the decorative cover is exposed outside the first shell and the second shell to fill the gap between the first shell and the second shell.

[0061] That is to say, no matter the electronic device is in a folded state or in a flattened state, from the appearance of the electronic device, the first shell and the second shell are seamlessly closed, thereby improving the appearance of the display device.

[0062] In a possible implementation, the electronic device includes a mobile terminal, for example, a foldable mobile phone, a foldable tablet, a foldable notebook, a foldable e-book, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] FIG1 is a schematic diagram of a folding structure of an electronic device provided in an embodiment of the present application;

[0064] FIG2 is a schematic diagram of a folding structure of another electronic device provided in an embodiment of the present application;

[0065] FIG3 is a schematic structural diagram of a rotating shaft mechanism according to an embodiment of the present application;

[0066] FIG4A is a diagram showing a rotating shaft mechanism provided by an embodiment of the present application in a flattened state;

[0067] FIG4B is a diagram showing a rotating shaft mechanism provided by an embodiment of the present application in a folded state;

[0068] FIG5 is an exploded view of a rotating shaft mechanism provided in an embodiment of the present application;

[0069] FIG6 is a schematic structural diagram of a rotating assembly provided in an embodiment of the present application;

[0070] FIG7 is a schematic structural diagram of a rotating member and a flat plate provided in an embodiment of the present application;

[0071] FIG8 is a partial enlarged view of a linkage structure provided in an embodiment of the present application;

[0072] FIG9A is a schematic diagram of the matching process of a translation member and a rotation member provided in an embodiment of the present application;

[0073] FIG9B is a schematic diagram of another cooperation process of a translation member and a rotation member provided in an embodiment of the present application;

[0074] FIG9C is a schematic diagram of another embodiment of the present application providing a process for cooperating between a translation member and a rotation member;

[0075] FIG10 is a state diagram of a first damping member when a rotating shaft mechanism provided by an embodiment of the present application is in a flattened state;

[0076] FIG11 is a structural diagram of the damping principle of the first damping member shown in FIG10 when a rotating shaft mechanism provided by an embodiment of the present application is in a flattened state;

[0077] FIG12 is a state diagram of a first damping member when a rotating shaft mechanism provided by an embodiment of the present application is in a folded state;

[0078] FIG13 is a structural diagram of a damping principle of the first damping member shown in FIG12 provided in an embodiment of the present application;

[0079] FIG14 is a structural diagram of the damping principle of a first damping member when a rotating shaft mechanism provided by an embodiment of the present application is in an intermediate angle state;

[0080] FIG15 is a schematic structural diagram of an inner shaft provided in an embodiment of the present application;

[0081] FIG16 is a schematic structural diagram of an inner shaft and a rotating assembly provided in an embodiment of the present application after assembly, in a flattened state;

[0082] FIG17 is a schematic structural diagram of an inner shaft and a rotating assembly provided in an embodiment of the present application, after being assembled and in a folded state;

[0083] FIG18 is a schematic structural diagram of an inner shaft provided in an embodiment of the present application;

[0084] FIG19A is a schematic structural diagram of an outer shaft provided in an embodiment of the present application;

[0085] FIG19B is a schematic diagram of the coordination of an inner shaft, an outer shaft, and a damping member provided in an embodiment of the present application;

[0086] FIG20 is a schematic diagram of the structure of an inner shaft, a rotating assembly, and an outer shaft after assembly according to an embodiment of the present application;

[0087] FIG21 is an exploded view of an electronic device provided in an embodiment of the present application;

[0088] FIG22 is a schematic diagram of an electronic device in use according to an embodiment of the present application;

[0089] FIG23 is a schematic diagram of another electronic device in use according to an embodiment of the present application;

[0090] FIG24 is a schematic diagram of the usage status of another electronic device provided in an embodiment of the present application.

[0091] Reference numerals: 1-electronic device; 11-first housing; 12-second housing; 13-third housing; 14-first rotating shaft mechanism; 15-second rotating shaft mechanism; 2-rotating shaft mechanism; 20-inner shaft; 21-first arc-shaped protrusion; 22-second arc-shaped protrusion; 23-third arc-shaped protrusion; 24-fourth arc-shaped protrusion; 25 - fifth arc-shaped protrusion; 26 - sixth arc-shaped protrusion; 27 - shaft segment; 20a - first assembly opening; 20b - end appearance component; 20c - first guide portion; 20c1 - first guide groove; 20c2 - first guide protrusion; 20d - second guide portion; 20e - first limiting portion; 20f - second limiting portion; 20h - first matching portion; 20h1 - first cam matching portion; 20h2 - first elastic member matching portion; 20i - second matching portion; 20j - first connecting portion; 30 - outer shaft; 31 - first arc-shaped recessed portion; 32 - second arc-shaped recessed portion; 33 - third arc-shaped recessed portion; 34 - fourth arc-shaped recessed portion; 35 - fifth arc-shaped recessed portion; 36 - sixth arc-shaped recessed portion; 30a - second assembly opening; 30b - end fitting; 30c - first translation member matching portion; 30d - second translation member matching portion; 30e - third limiting portion; 30f - fourth limiting portion; 30h - third matching portion; 30i - fourth matching portion; 30j - second connecting portion; U1 - first arc-shaped groove; U2 - second arc-shaped groove; 40 - rotating assembly; 40A - first swing arm; 40B - second swing arm; 41 - first rotating member; 411 - first protrusion; 42 - second rotating member; 421 - Second protrusion; 422-second cam; 43-third rotating member; 431-first cam; 44-fourth rotating member; 45-first plate; 46-second plate; 47-linkage structure; 471-first translation member; 471a-groove; 4711-first recessed portion; 472-second translation member; 472a-groove; 4721-second recessed portion; 473-rotating member; 48-fifth rotating member; 49-sixth rotating member; 40a-third assembly opening; 50-decorative cover; 60-first damping member; 61-first connected cam; 62-first elastic portion; 63 first pin; 64-first gasket; 65-second gasket; 70-second damping member; 3-display screen; 301-first part; 302-second part; 303-third part; 304-fourth part; 305-fifth part. DETAILED DESCRIPTION

[0092] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0093] Hereinafter, the terms "second," "first," etc., are used for descriptive convenience only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature qualified as "second," "first," etc., may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0094] In addition, in the embodiments of the present application, directional terms such as "up", "down", "left", and "right" may be defined including but not limited to the orientation relative to the schematic placement of the components in the drawings. It should be understood that these directional terms may be relative concepts, which are used for relative descriptions and clarifications, and may change accordingly according to changes in the orientation of the components in the drawings.

[0095] In the embodiments of this application, unless otherwise specified or limited, the term "connection" should be understood in a broad sense. For example, "connection" can mean fixed connection, detachable connection, or integration; it can mean direct connection or indirect connection through an intermediate medium. In addition, the term "coupling" can mean direct electrical connection or indirect electrical connection through an intermediate medium. The term "contact" can mean direct contact or indirect contact through an intermediate medium.

[0096] In the embodiments of the present application, "and / or" describes the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, and B exists alone. A and B can be singular or plural. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0097] An embodiment of the present application provides an electronic device, which is a device with a foldable screen function. For example, the electronic device is a consumer electronic product, a vehicle-mounted electronic product, etc. Among them, consumer electronic products include mobile phones, tablet computers, laptop computers, e-readers, personal computers (PCs), personal digital assistants (PDAs), desktop displays, smart wearable products (for example, smart watches, smart glasses, smart bracelets), virtual reality (VR) devices, augmented reality (AR) devices, cameras, etc. Vehicle-mounted electronic products include vehicle-mounted navigation systems, vehicle-mounted high-density digital video discs (DVDs), etc. The embodiments of the present application do not impose any special restrictions on the specific forms of the above-mentioned electronic devices.

[0098] 1 and 2 are schematic diagrams of a folding structure of an electronic device provided in an embodiment of the present application.

[0099] In some embodiments, as shown in FIG1 , the electronic device 1 provided in the embodiment of the present application is a two-fold screen electronic device.

[0100] As shown in FIG1 , the electronic device 1 includes a first shell 11 , a second shell 12 and a first hinge mechanism 14 . The first shell 11 and the second shell 12 are spaced apart. The first hinge mechanism 14 is located between the first shell 11 and the second shell 12 and is connected to the first shell 11 and the second shell 12 respectively.

[0101] The first housing 11 and / or the second housing 12 may be the middle frame structure of the electronic device 1. For example, the first housing 11 and / or the second housing 12 may respectively form an installation space for mounting components of the electronic device, such as a battery, circuit board, camera, earphones, receiver, buttons, and battery. The circuit board may integrate electronic components such as the electronic device's main controller, storage unit, antenna module, and power management module, while the battery may power the circuit board, receiver, speaker, camera, and other electronic components.

[0102] In addition, the first shell 11 and the second shell 12 may be of equal thickness or unequal thickness, which is not limited in the embodiment of the present application.

[0103] In a possible design, both the first shell 11 and the second shell 12 may be provided with installation spaces, and the electronic components of the electronic device 1 may be distributed in the shells on both sides.

[0104] In another possible design, installation space may be provided only in the first housing 11, and the electronic components of the electronic device 1 may be centrally distributed in the first housing 11. Alternatively, installation space may be provided in both the first housing 11 and the second housing 12, but most of the electronic components of the electronic device 1 may be provided in the first housing 11, with a smaller portion provided in the second housing 12, making the second housing 12 lighter and more convenient to fold and unfold.

[0105] In other embodiments, as shown in FIG2 , the electronic device 1 provided in the embodiment of the present application is a three-fold screen electronic device.

[0106] As shown in FIG. 2 , the electronic device 1 includes a first housing 11 , a second housing 12 , a third housing 13 , a first hinge mechanism 14 , and a second hinge mechanism 15 .

[0107] The first housing 11 and the second housing 12 are spaced apart, and the first rotating shaft mechanism 14 is located between the first housing 11 and the second housing 12 and is connected to the first housing 11 and the second housing 12 respectively. The second rotating shaft mechanism 15 is located between the second housing 12 and the third housing 13 and is connected to the second housing 12 and the third housing 13 respectively.

[0108] The first hinge mechanism 14 and the second hinge mechanism 15 are important components of the foldable electronic device. The dimensions of the first hinge mechanism 14 and the second hinge mechanism 15 in the thickness direction of the electronic device 1 directly affect the thickness of the entire electronic device 1 .

[0109] FIG3 is a schematic structural diagram of a rotating shaft mechanism according to an embodiment of the present application.

[0110] In some embodiments, as shown in Figure 3, the rotating shaft mechanism 2 includes an inner shaft 20, an outer shaft 30 and a rotating assembly 40. The rotating assembly 40 is located between the inner shaft 20 and the outer shaft 30. The rotating assembly 40 includes a plurality of gears meshed in sequence, and the axial direction of the gears is parallel to the rotation axis of the rotating shaft mechanism 2.

[0111] Due to the influence of the gear diameter, the thickness of the rotating shaft mechanism 2 cannot be made relatively thin, thereby affecting the thickness of the entire electronic device 1 and failing to meet the demand for thinness and lightness.

[0112] Figures 4A and 4B illustrate cross-sectional views of the hinge mechanism provided by the present application in two different states. Figure 4A shows the hinge mechanism in a flattened state, while Figure 4B shows the hinge mechanism in a folded state. Figure 5 is an exploded view of a hinge mechanism provided by an embodiment of the present application.

[0113] The present invention provides a rotating shaft mechanism 2. Referring to Figures 4A, 4B, and 5, the rotating shaft mechanism 2 includes an inner shaft 20 and a rotating assembly 40. In some embodiments, the rotating shaft mechanism 2 further includes an outer shaft 30 and a decorative cover 50. The inner shaft 20, rotating assembly 40, outer shaft 30, and decorative cover 50 are sequentially arranged along the thickness direction (first direction Z) of the rotating shaft mechanism 2.

[0114] As shown in FIG5 , the direction in which the inner shaft 20, the rotating assembly 40, the outer shaft 30, and the decorative cover 50 are stacked is the thickness direction of the rotating shaft mechanism 2. In this embodiment of the application, the thickness direction of the rotating shaft mechanism 2 is referred to as the first direction Z, the length direction of the rotating shaft mechanism 2 (that is, the direction of the rotation axis of the rotating shaft mechanism 2) is referred to as the third direction Y, and the width direction of the rotating shaft mechanism 2 is referred to as the second direction X. The first direction Z is perpendicular to the extension direction Y of the rotating shaft.

[0115] The inner shaft 20 and outer shaft 30 are provided as separate components and are detachably connected, for example, by screws. The rotating assembly 40 is provided on each of the inner shaft 20 and outer shaft 30, with assembly openings provided thereon. The rotating assembly 40 is positioned between the inner shaft 20 and outer shaft 30 and also has matching assembly openings provided thereon. The assembly method illustrated in FIG5 is merely illustrative and is not intended to be limiting. The separate configuration of the inner shaft 20 and outer shaft 30 facilitates the installation and assembly of the rotating assembly 40.

[0116] Regarding the rotating assembly 40 included in the rotating shaft mechanism 2, the rotating assembly 40 is disposed between the inner shaft 20 and the outer shaft 30. In some embodiments, along the third direction Y, one rotating assembly 40 provided in the embodiment of the present application may be disposed, or multiple rotating assemblies 40 provided in the embodiment of the present application may be disposed. FIG5 illustrates only an example of three rotating assemblies 40 disposed between the inner shaft 20 and the outer shaft 30.

[0117] FIG6 is a schematic structural diagram of a rotating assembly provided in an embodiment of the present application.

[0118] In some embodiments, as shown in FIG. 6 , the rotating assembly 40 includes a first swing arm 40A, a second swing arm 40B, and a linkage structure 47 .

[0119] The first swing arm 40A and the second swing arm 40B can rotate relative to or away from each other along the rotation axis of the hinge mechanism 2 to switch the hinge mechanism 2 between a flattened state and a folded state. For example, from the perspective of FIG6 , the hinge mechanism 2 is in the flattened state. When the first swing arm 40A and the second swing arm 40B rotate relative to each other, the hinge mechanism 2 can switch to the folded state. Conversely, when the hinge mechanism 2 is in the folded state, rotating the first swing arm 40A and the second swing arm 40B away from each other can switch the hinge mechanism 2 to the flattened state.

[0120] The rotation axis of the rotating shaft mechanism 2 is parallel to the third direction Y. The rotation axis of the rotating shaft mechanism 2 is, for example, the center line of the rotating shaft mechanism 2 .

[0121] In some embodiments, the first swing arm 40A includes a first rotating member 41 and a first flat plate 45, and the first rotating member 41 and the first flat plate 45 are fixedly connected. For example, the first rotating member 41 and the first flat plate 45 are an integrally formed structure.

[0122] The second swing arm 40B includes a second rotating member 42 and a second flat plate 46. The second rotating member 42 and the second flat plate 46 are fixedly connected. For example, the second rotating member 42 and the second flat plate 46 are an integrally formed structure.

[0123] Along the third direction Y, the first rotating member 41 and the second rotating member 42 are located on both sides of the linkage structure 47. For example, the first rotating member 41 and the second rotating member 42 can be symmetrically arranged on opposite sides of the linkage structure 47, or the first rotating member 41 and the second rotating member 42 can be diagonally arranged on opposite sides of the linkage structure 47.

[0124] Along the second direction X, the first flat plate 45 and the second flat plate 46 are located on both sides of the linkage structure 47 . Exemplarily, the first flat plate 45 and the second flat plate 46 may be symmetrically arranged on both sides of the linkage structure 47 .

[0125] The first plate 45 can drive the first rotating member 41 to rotate relative to the inner shaft 20, thereby enabling the first swing arm 40A to rotate relative to the inner shaft 20. The second plate 46 can drive the second rotating member 42 to rotate relative to the inner shaft 20, thereby enabling the second swing arm 40B to rotate relative to the inner shaft 20.

[0126] 6 , in some embodiments, the first swing arm 40A further includes a third rotating member 43, and the third rotating member 43 is fixedly connected to the first flat plate 45. For example, the third rotating member 43 and the first flat plate 45 are integrally formed.

[0127] The third rotating member 43 and the first rotating member 41 are arranged on both sides of the linkage structure 47 opposite to each other. When the shaft mechanism 2 is in the flattened state, the third rotating member 43 and the second rotating member 42 are arranged side by side along the second direction X and are located on the second side of the linkage structure 47.

[0128] The first rotating member 41 includes a first end and a second end, and the fourth rotating member 44 includes a first end and a second end. When the rotating shaft mechanism 2 is in a flattened state, the first end of the first rotating member 41 and the first end of the fourth rotating member 44 are arranged adjacent to each other, the second end of the first rotating member 41 facing away from the fourth rotating member 44 is connected to the first flat plate 45, and the second end of the fourth rotating member 44 facing away from the first rotating member 41 is connected to the second flat plate 46.

[0129] The second swing arm 40B further includes a fourth rotating member 44 , which is fixedly connected to the second flat plate 46 . For example, the fourth rotating member 44 and the second flat plate 46 are an integrally formed structure.

[0130] The fourth rotating member 44 and the second rotating member 42 are arranged opposite to each other on both sides of the linkage structure 47 . When the shaft mechanism 2 is in the flattened state, the first rotating member 41 and the fourth rotating member 44 are arranged side by side along the second direction X and are located on the first side of the linkage structure 47 .

[0131] The third rotating member 43 includes a first end and a second end, and the second rotating member 42 includes a first end and a second end. When the rotating shaft mechanism 2 is in a flattened state, the first end of the third rotating member 43 and the first end of the second rotating member 42 are arranged adjacent to each other, and the second end of the third rotating member 43 is away from the second rotating member 42 and is connected to the first flat plate 45, and the second end of the second rotating member 42 is away from the third rotating member 43 and is connected to the second flat plate 46.

[0132] The first plate 45 can also drive the third rotating member 43 to rotate relative to the inner shaft 20, and the second plate 46 can also drive the fourth rotating member 44 to rotate relative to the inner shaft 20. The first rotating member 41, the second rotating member 42, the third rotating member 43, and the fourth rotating member 44 can each rotate relative to the inner shaft 20. In some embodiments, the first rotating member 41 and the third rotating member 43 rotate synchronously, and the fourth rotating member 44 and the second rotating member 42 rotate synchronously.

[0133] For example, when the hinge mechanism 2 rotates from the flattened state to the folded state, the first rotating member 41 and the third rotating member 43 rotate counterclockwise from the state shown in FIG4A to the state shown in FIG4B . Simultaneously, the second rotating member 42 and the fourth rotating member 44 rotate clockwise from the state shown in FIG4A to the state shown in FIG4B .

[0134] When the hinge mechanism 2 rotates from the folded state to the flattened state, the first rotating member 41 and the third rotating member 43 rotate clockwise from the state shown in FIG4B to the state shown in FIG4A . Simultaneously, the second rotating member 42 and the fourth rotating member 44 rotate counterclockwise from the state shown in FIG4B to the state shown in FIG4A .

[0135] 6 , the first swing arm 40A further includes a fifth rotating member 48, which is fixedly connected to the first flat plate 45. For example, the fifth rotating member 48 and the first flat plate 45 are integrally formed.

[0136] The second swing arm 40B further includes a sixth rotating member 49, which is fixedly connected to the second flat plate 46. For example, the sixth rotating member 49 and the second flat plate 46 are an integrally formed structure.

[0137] The fifth rotating member 48 is arranged on the side of the third rotating member 43 away from the linkage structure 47, and the sixth rotating member 49 is arranged on the side of the second rotating member 42 away from the linkage structure 47. When the shaft mechanism 2 is in the flat state, the fifth rotating member 48 and the sixth rotating member 49 are arranged side by side along the second direction X.

[0138] The end of the fifth rotating member 48 facing away from the sixth rotating member 49 is connected to the first plate 45, and the first plate 45 can also drive the fifth rotating member 48 to rotate relative to the inner shaft 20. The end of the sixth rotating member 49 facing away from the fifth rotating member 48 is connected to the second plate 46, and the second plate 46 can also drive the sixth rotating member 49 to rotate relative to the inner shaft 20.

[0139] In some embodiments, the first plate 45 drives the first rotating member 41 , the third rotating member 43 and the fifth rotating member 48 to rotate synchronously, and the second plate 46 drives the second rotating member 42 , the fourth rotating member 44 and the sixth rotating member 49 to rotate synchronously.

[0140] FIG7 is a schematic structural diagram of a rotating member and a flat plate provided in an embodiment of the present application.

[0141] 7 , the first rotating member 41 , the third rotating member 43 , the fifth rotating member 48 and the first plate 45 are integrally formed, and the fourth rotating member 44 , the second rotating member 42 , the sixth rotating member 49 and the second plate 46 are integrally formed.

[0142] In some embodiments, assembly openings are provided on the first rotating member 41, the third rotating member 43, the fifth rotating member 48, the first plate 45, the second rotating member 42, the fourth rotating member 44, the sixth rotating member 49, and the second plate 46. The present embodiment does not limit the shape and location of these assembly openings, which can be determined based on the assembly of the shaft mechanism 2. The hole-shaped assembly openings shown in FIG. 7 are for illustration only and are not intended to be limiting.

[0143] In some embodiments, as shown in FIG7 , the first plate 45 and the second plate 46 are sheet-like structures, and the first plate 45 and the second plate 46 extend outward from the protrusion to connect with the rotating member. Of course, the first plate 45 and the second plate 46 can also be provided with notches to meet the needs of different application scenarios.

[0144] 6 and 7 , in some embodiments, the rotating assembly 40 has an upper surface a1 and a lower surface a2. The upper surface a1 is the surface of the rotating assembly 40 facing the inner shaft 20, and the lower surface a2 is the surface of the rotating assembly 40 facing the outer shaft 30. FIG6 and FIG7 illustrate the rotating assembly 40 from the upper surface a1 and lower surface a2 sides, respectively.

[0145] Next, the structure of the linkage structure 47 is described with an example.

[0146] FIG8 is a partially enlarged view of a linkage structure provided in an embodiment of the present application.

[0147] As shown in FIG. 8 , in some embodiments, the linkage structure 47 includes a rotating member 473 , a first translation member 471 , and a second translation member 472 .

[0148] The first translation member 471 is slidably connected relative to the inner shaft 20 and is clamped relative to the first swing arm 40A. The second translation member 472 is slidably connected relative to the inner shaft 20 and is clamped relative to the second swing arm 40B. The rotating member 473 connects the first translation member 471 and the second translation member 472, and is rotatably connected relative to the inner shaft 20. The rotation axis of the rotating member 473 is parallel to the first direction Z.

[0149] When the first swing arm 40A rotates, it drives the first translation member 471 to slide in a direction parallel to the second direction X. When the second swing arm 40B rotates, it drives the second translation member 472 to slide in a direction parallel to the second direction X. Regardless of whether the first swing arm 40A and the second swing arm 40B rotate relative to each other or rotate in opposite directions, the sliding directions of the first translation member 471 and the second translation member 472 are always opposite. For example, during the transformation of the hinge mechanism 2 from the flattened state to the folded state, the first swing arm 40A and the second swing arm 40B rotate relative to each other along the rotation axis of the hinge mechanism, thereby driving the first translation member 471 and the second translation member 472 to slide in opposite directions in a direction parallel to the second direction X. Similarly, during the transformation of the hinge mechanism 2 from the folded state to the flattened state, the first swing arm 40A and the second swing arm 40B rotate relative to each other along the rotation axis of the hinge mechanism, thereby driving the first translation member 471 and the second translation member 472 to slide in opposite directions in a direction parallel to the second direction X. When the first translation member 471 and the second translation member 472 slide, they can drive the rotating member 473 to rotate, and the rotating member 473 can synchronize the sliding of the first translation member 471 and the second translation member 472 .

[0150] The rotation axis of the rotating member 473 is parallel to the first direction Z, or it can be understood that the rotating member 473 rotates in a plane parallel to the second direction X and the third direction Y.

[0151] In some embodiments, the first translation member 471 is located on a side of the rotating member 473 close to the first rotatable member 41. The first translation member 471 is connected to the first rotatable member 41, and the first rotatable member 41 can drive the first translation member 471 to slide in a direction parallel to the second direction X. The first flat plate 45 drives the first rotatable member 41 to rotate, thereby driving the first translation member 471 to slide, so that the first swing arm 40A drives the first translation member 471 to slide.

[0152] The second translation member 472 is located on a side of the rotating member 473 close to the second rotatable member 42 . The second translation member 472 is connected to the second rotatable member 42 . The second rotatable member 42 can drive the second translation member 472 to slide in a direction parallel to the second direction X. The second flat plate 46 drives the second rotatable member 42 to rotate, thereby driving the second translation member 472 to slide, thereby enabling the second swing arm 40B to drive the second translation member 472 to slide.

[0153] For example, when the hinge mechanism 2 rotates from the flattened state to the folded state, from the perspective shown in FIG8 , the first flat plate 45 drives the first rotating member 41 to rotate counterclockwise, and the first rotating member 41 drives the first translating member 471 to move from left to right. The second flat plate 46 drives the second rotating member 42 to rotate clockwise, and the second rotating member 42 drives the second translating member 472 to move from right to left.

[0154] When the hinge mechanism 2 rotates from the folded state to the flat state, the first flat plate drives the first rotating member 41 to rotate clockwise, and the first rotating member 41 drives the first translation member 471 to move from right to left. The second flat plate 46 drives the second rotating member 42 to rotate counterclockwise, and the second rotating member 42 drives the second translation member 472 to move from left to right.

[0155] During the rotation of the shaft mechanism 2 , the first rotating member 41 and the second rotating member 42 always rotate in a counterclockwise direction, thereby driving the first translation member 471 and the second translation member 472 to always move in parallel and in opposite directions.

[0156] The following schematically illustrates the connection between the first translation member 471 and the first rotation member 41 , and the connection between the second translation member 472 and the second rotation member 42 .

[0157] FIG9A , FIG9B and FIG9C are schematic diagrams of the matching process of a translation member and a rotation member provided in an embodiment of the present application.

[0158] As shown in FIG9A , in some embodiments, the first translation member 471 includes a first recessed portion 4711 that is recessed away from the first rotation member 41, and the first rotation member 41 includes a first raised portion 411 that is raised toward the first translation member 471. The first raised portion 411 extends into the first recessed portion 4711 and engages with the first recessed portion 4711, thereby driving the first translation member 471 to slide during the rotation of the first rotation member 41.

[0159] The first protrusion 411 and other parts of the first translation member 471 can be an integrally formed structure, or the first protrusion 411 and other parts of the first translation member 471 can be separate structures that are fixedly connected, which is not limited in this embodiment of the present application.

[0160] The embodiment of the present application does not limit the specific structure of the first protrusion 411. The first protrusion 411 can be a regular structure or an irregular structure. For example, the first protrusion 411 is a pin, and the first recessed portion 4711 is a groove matching the pin.

[0161] After the first protrusion 411 is engaged with the first recess 4711 , the surface of the first protrusion 411 may contact the inner wall of the first recess 4711 or a gap may remain, which is not limited in this embodiment of the present application.

[0162] The first convex portion 411 and the first concave portion 4711 cooperate with each other to achieve mechanical connection between the first translation member 471 and the first rotation member 41 , which has a simple structure, a simple process and is easy to implement.

[0163] 9A , in some embodiments, the first protrusion 411 is located at an end of the first rotating member 41 away from the first flat plate 45 . When the hinge mechanism 2 is in the flattened state, the first protrusion 411 is located near the fourth rotating member 44 and protrudes toward the first translation member 471 .

[0164] Correspondingly, the first recessed portion 4711 is located at an end of the first translation member 471 close to the first plate 45 , and a major portion of the first translation member 471 is located at an end of the first recessed portion 4711 close to the second plate 46 .

[0165] Based on this structure, from the perspective of Figure 9A , during the folding process of the hinge mechanism 2, the first flat plate 45 drives the first rotating member 41 to rotate counterclockwise, thereby driving the first translating member 471 to move from the side of the second flat plate 46 to the side of the first flat plate 45. As shown in Figure 9B , as the hinge mechanism 2 rotates, the first translating member 471 gradually slides. As shown in Figure 9C , when the hinge mechanism 2 rotates to the folded state, the first translating member 471 slides closer to the first flat plate 45.

[0166] By arranging the first protrusion 411 at the inner end of the first rotating member 41 and the first recessed portion 4711 at the outer end of the first translation member 471, the first translation member 471 can move a larger amount during the folding process of the hinge mechanism 2, and the full-angle rotation of the first rotating member 41 can be achieved with a more sophisticated structure. The space requirement on the second direction X of the hinge mechanism 2 is relatively small, which helps to achieve the sophistication of the hinge mechanism 2.

[0167] Accordingly, in some embodiments, as shown in FIG9A , the second translation member 472 includes a second recessed portion 4721 that is recessed away from the second rotation member 42, and the second rotation member 42 includes a second raised portion 421 that is raised toward the second translation member 472. The second raised portion 421 extends into the second recessed portion 4721 and engages with the second recessed portion 4721, thereby driving the second translation member 472 to slide during the rotation of the second rotation member 42.

[0168] The second protrusion 421 and other parts of the second translation member 472 can be an integrally formed structure, or the second protrusion 421 and other parts of the second translation member 472 can be separate structures that are fixedly connected, which is not limited in this embodiment of the present application.

[0169] The embodiment of the present application does not limit the specific structure of the second protrusion 421. The second protrusion 421 can be a regular structure or an irregular structure. For example, the second protrusion 421 is a pin, and the second recessed portion 4721 is a groove matching the pin.

[0170] After the second protrusion 421 is engaged with the second recess 4721 , the surface of the second protrusion 421 may contact the inner wall of the second recess 4721 or a gap may remain, which is not limited in this embodiment of the present application.

[0171] The second convex portion 421 and the second concave portion 4721 cooperate with each other to achieve mechanical connection between the second translation member 472 and the second rotation member 42 , which has a simple structure, a simple process and is easy to implement.

[0172] As shown in Figure 9A, in some embodiments, the second protrusion 421 is located at an end of the second rotating member 42 away from the second flat plate 46, and the second recessed portion 4721 is located at an end of the second translating member 472 closer to the second flat plate 46. When the hinge mechanism 2 is in the flattened state, the second protrusion 421 is located near the third rotating member 43 and protrudes toward the second translating member 472.

[0173] Correspondingly, the second recessed portion 4721 is located at an end of the second translation member 472 close to the second flat plate 46 , and a major portion of the second translation member 472 is located at an end of the second recessed portion 4721 close to the first flat plate 45 .

[0174] Based on this structure, from the perspective of Figure 9A , during the folding process of the hinge mechanism 2, the second flat plate 46 drives the second rotating member 42 to rotate clockwise, thereby driving the second translating member 472 to move from the side of the first flat plate 45 to the side of the second flat plate 46. As shown in Figure 9B , as the hinge mechanism 2 rotates, the second translating member 472 gradually slides. As shown in Figure 9C , when the hinge mechanism 2 rotates to the folded state, the second translating member 472 slides to the side closer to the second flat plate 46.

[0175] By arranging the second protrusion 421 at the inner end of the second rotating member 42 and the second recessed portion 4721 at the outer end of the second translation member 472, the second translation member 472 can move a larger amount during the folding process of the hinge mechanism 2, and the full-angle rotation of the second rotating member 42 can be achieved with a more sophisticated structure. The space requirement on the second direction X of the hinge mechanism 2 is relatively small, which helps to achieve the sophistication of the hinge mechanism 2.

[0176] As shown in FIG. 9A , in some embodiments, the rotating member 473 includes a gear, the first translating member 471 includes a first rack, and the second translating member 472 includes a second rack. The first rack and the second rack are respectively configured to engage with the gear.

[0177] The gear rack structure is adopted to achieve synchronization of the first translation member 471 and the second translation member 472 by the rotating member. The structure is simple and easy to implement.

[0178] The embodiment of the present application provides a rotating shaft mechanism 2, and the linkage structure 47 includes a first translation member 471, a second translation member 472, and a rotating member 473. The first translation member 471 and the second translation member 472 always move along the width direction (second direction X) of the rotating shaft mechanism 2. The dimension requirement of the first translation member 471 and the second translation member 472 in the thickness direction (first direction Z) of the rotating shaft mechanism 2 is the dimension of the thickness of the first translation member 471 and the second translation member 472 themselves. Synchronously, the axial direction of the rotating member 473 is the thickness direction of the rotating shaft mechanism 2. In other words, the rotating member 473 is placed horizontally in the rotating shaft mechanism 2. Therefore, the dimension requirement of the rotating member 473 in the thickness direction of the rotating shaft mechanism 2 is also the thickness of the rotating member 473 itself along the axial direction. Compared with the radial direction of the rotating part in the linkage structure being parallel to the first direction Z and the thickness requirement of the linkage structure being at least the outer diameter of the linkage structure, the thickness requirement of the linkage structure 47 provided in the embodiment of the present application is significantly reduced, and it is adapted to the flat space of the rotating shaft mechanism 2. The structure is simple, the void is small, and the thickness of the rotating shaft mechanism 2 is thin.

[0179] When the hinge mechanism 2 provided in the present application is folded, it may be necessary for the hinge mechanism 2 to hover at a certain angle to enhance the user experience. In some embodiments, the hinge mechanism 2 provided in the present application also includes a damping structure. For example, when the hinge mechanism 2 is in a flattened state, it is necessary to apply a flattening force to the first flat plate 45 and the second flat plate 46 through the damping structure so that the hinge mechanism 2 remains in the flattened state. For another example, when the hinge mechanism 2 is in a closed state, it is necessary to apply a closing force to the first flat plate 45 and the second flat plate 46 through the damping structure so that the hinge mechanism 2 remains in the closed state.

[0180] Please refer back to Figure 6. In some embodiments, the rotating assembly 40 also includes a first damping member 60. The first damping member 60 is located on the side of the second rotating member 42 and the third rotating member 43 away from the linkage structure 47, and the first damping member 60 abuts against the second rotating member 42 and the third rotating member 43.

[0181] Alternatively, it can be understood that the first damping member 60 is located between the second rotating member 42 and the third rotating member 43 , and between the fifth rotating member 48 and the sixth rotating member 49 .

[0182] When the first plate 45 drives the third rotating member 43 to rotate, and the second plate 46 drives the second rotating member 42 to rotate, the first damping member 60 is used to apply resistance to the first plate 45 and the second plate 46. For example, the first damping member 60 applies resistance to the first plate 45 through the third rotating member 43, causing the first plate 45 to hover at a certain position. The first damping member 60 simultaneously applies resistance to the second plate 46 through the second rotating member 42, causing the second plate 46 to hover at a certain position.

[0183] By providing a first damping member 60 within the rotating assembly 40, the first damping member 60 applies resistance to the first and second plates 45, 46 as they rotate, allowing the first and second plates 45, 46 to hover when rotating relative to the inner shaft 20. When the hinge mechanism 2 is implemented in the electronic device 1, the first housing 11 is fixedly connected to the first plate 45, and the second housing 12 is fixedly connected to the second plate 46. This ensures that the electronic device 1 can hover during folding, improving the user experience.

[0184] FIG10 is a state diagram of the first damping member when the rotating shaft mechanism provided by an embodiment of the present application is in a flattened state.

[0185] In some embodiments, as shown in FIG. 10 , the third rotating member 43 and the second rotating member 42 respectively have a first cam 431 and a second cam 422 on a side away from the second protruding portion 421 (or the linkage structure 47 ).

[0186] Synchronously, the first damping member 60 includes a first integrated cam 61 , a first elastic portion 62 and a first pin 63 .

[0187] The first connected cam 61 is rotatably mounted on one end of the first pin shaft 63 close to the second protrusion 421 (or the linkage structure 47), and engages with the first cam 431 and the second cam 422. The first elastic portion 62 is sleeved on the first pin shaft 63 and is located on the side of the first connected cam 61 away from the first cam 431 and the second cam 422.

[0188] In some embodiments, the first pin 63 includes a shaft portion and an end portion. The shaft portion of the first pin 63 extends along the third direction Y, and the first integrated cam 61 is slidably disposed at an end of the shaft portion away from the end portion. The diameter of the shaft portion is smaller than the diameter of the first elastic portion 62, which is sleeved onto the shaft portion. The diameter of the end portion is larger than the diameter of the first elastic portion 62, and the first elastic portion 62 is defined between the first integrated cam 61 and the end portion.

[0189] The elastic deformation direction of the first elastic portion 62 is parallel to the extension direction of the first pin 63. When the first elastic portion 62 elastically deforms, it can apply a reverse elastic force along the third direction Y to the first integrated cam 61. For example, when assembled into the first damping member 60, the first elastic portion 62 is in a compressed state.

[0190] The first damping member 60 may include one or more first pins 63, and each first pin 63 is sleeved with a first elastic portion 62. FIG10 illustrates an example in which the first damping member 60 includes four first pins 63.

[0191] The provision of multiple first pins 63 facilitates balanced and stable movement of the connected first conjoined cams 61. Furthermore, since each first pin 63 is provided with a first elastic portion 62, a greater compressive force can be applied to the first cam 431 and the second cam 422, forcing the first plate 45 and the second plate 46 to remain in a stable suspended position, thereby enhancing the opening and closing experience in the intermediate state.

[0192] When the first plate 45 rotates, the third rotating member 43 drives the first cam 431 to rotate. The first cam 431 slides relative to the first integrated cam 61, applying a compressive force to the first integrated cam 61. The first integrated cam 61 slides toward the first elastic portion 62, applying a damping force to the first elastic portion 62. The elastic properties of the first elastic portion 62 apply resistance to the first plate 45 through a reverse path, causing the first plate 45 to hover at a certain position.

[0193] Simultaneously, when the second plate 46 rotates, a damping force is applied to the first elastic portion 62 , and the first elastic portion 62 applies resistance to the second plate 46 through a reverse path, so that the second plate 46 is suspended at a certain position.

[0194] 10 , in some embodiments, the first damping member 60 further includes a first gasket 64 and a second gasket 65 . The first gasket 64 and the second gasket 65 are disposed at both ends of the first elastic portion 62 , and are sleeved on the first pin 63 .

[0195] For example, the first gasket 64 is disposed between the first elastic portion 62 and the first integrated cam 61 , and the second gasket 65 is disposed between the first elastic portion 62 and the end of the first pin 63 .

[0196] In some embodiments, the first damping member 60 includes multiple first pins 63, and the first gasket 64 mounted on the multiple first pins 63 can be a discrete structure or an integrally formed structure, and the second gasket 65 mounted on the multiple first pins 63 can be a discrete structure or an integrally formed structure.

[0197] By providing the first gasket 64 and the second gasket 65 at both ends of the first elastic portion 62 , the forces acting on the first pin shaft and the first integrated cam can be evenly distributed.

[0198] In some embodiments, the first elastic portion 62 is, for example, a spring. Using a spring as the first elastic portion 62 has a simple structure and low cost.

[0199] FIG11 is a structural diagram of the damping principle of the first damping member 60 shown in FIG10 when the rotating shaft mechanism provided in an embodiment of the present application is in a flattened state.

[0200] As shown in Figure 11, the end of the first cam 431 proximal to the first integral cam 61 has a first damping surface A1 and a second damping surface A2 opposite the first integral cam 61. The first integral cam 61 also has a third damping surface B1 and a fourth damping surface B2 opposite the first cam 431. In conjunction with Figures 10 and 11, when the third rotating member 43 rotates the first cam 431 to the first position, the first damping surface A1 abuts the third damping surface B1, and the first elastic portion 62 is in an energy-storing state, thereby generating a squeezing force f1 on the first cam 431. This squeezing force f1 generates a flattening force on the first cam 431. As a result, since the first cam 431 is connected to the first plate 45, the flattening force applied by the first cam 431 is applied to the first plate 45. Under the action of the flattening force, the first plate 45 remains in a suspended, flattened state.

[0201] Synchronously, the second cam 422 has fifth and sixth damping surfaces at one end proximal to the first conjoined cam 61, while the first conjoined cam 61 has seventh and eighth damping surfaces opposite the second cam 422. When the second rotating member 42 drives the second cam 422 to rotate to the first position, the fifth damping surface abuts the seventh damping surface, and the first elastic portion 62 is in an energy-storing state, thereby exerting a squeezing force on the second cam 422. This squeezing force can cause the second cam 422 to generate a flattening force. In this way, since the second cam 422 is connected to the second plate 46, the second plate 46 is subjected to the flattening force exerted by the second cam 422, and the second plate 46 maintains a suspended, flattened state under the action of the flattening force.

[0202] Figure 12 is a diagram showing the first damping member when the shaft mechanism is in a folded state according to an embodiment of the present application. Figure 13 is a diagram showing the damping principle structure of the first damping member shown in Figure 12 according to an embodiment of the present application.

[0203] When the third rotating member 43 drives the first cam 431 to rotate to the second position, the second damping surface A2 abuts the fourth damping surface B2, and the first elastic portion 62 is in an energy-storing state, thereby generating a squeezing force f2 on the first cam 431. The squeezing force f2 can generate a folding force on the first cam 431. In this way, since the first cam 431 is connected to the first flat plate 45, the first flat plate 45 is subjected to the folding force exerted by the first cam 431, and the first flat plate 45 is maintained in a suspended folded state under the action of the folding force.

[0204] Simultaneously, when the second rotating member 42 drives the second cam 422 to rotate to the second position, the sixth damping surface abuts the eighth damping surface, and the first elastic portion 62 is in an energy-storing state, thereby exerting a squeezing force on the second cam 422. This squeezing force can generate a folding force on the second cam 422. In this way, since the second cam 422 is connected to the second flat plate 46, the second flat plate 46 is subjected to the folding force exerted by the second cam 422, and the second flat plate 46 is maintained in a suspended folded state under the action of the folding force.

[0205] FIG14 is a structural diagram of the damping principle of the first damping member when the rotating shaft mechanism provided in an embodiment of the present application is in an intermediate angle state.

[0206] As shown in FIG14 , when the third rotating member 43 drives the first cam 431 to rotate to a third position between the first and second positions, the convex surface of the first cam 431 abuts against the convex surface of the first connected cam 61, and the first elastic portion 62 is in an energy storage state, thereby generating a squeezing force f3 on the first cam 431. The squeezing force f3 can generate a retaining force on the first cam 431. In this way, since the first cam 431 is connected to the first flat plate 45, the first flat plate 45 is subjected to the retaining force exerted by the first cam 431. Under the action of the retaining force, the first flat plate 45 remains suspended at an angle intermediate between the folded state and the flattened state.

[0207] Simultaneously, when the second rotating member 42 drives the second cam 422 to rotate to a third position between the first and second positions, the convex surface of the second cam 422 abuts the convex surface of the first connected cam 61, and the first elastic portion 62 is in an energy storage state, thereby generating a squeezing force on the second cam 422. This squeezing force can generate a retaining force on the second cam 422. In this way, since the second cam 422 is connected to the second flat plate 46, the second flat plate 46 is subjected to the retaining force exerted by the second cam 422. Under the action of the retaining force, the second flat plate 46 remains suspended at an angle intermediate between the folded state and the flattened state.

[0208] By using the first connected cam 61 to abut against the first cam 431 and the second cam 422 , the first plate 45 and the second plate 46 can be subjected to a damping force when they rotate, so that the first plate 45 and the second plate 46 are symmetrically in a suspended position.

[0209] Of course, in some embodiments, the first damping member 60 does not include the first integrated cam 61, but instead includes a third cam and a fourth cam, with the third cam abutting against the first cam 431, and the fourth cam abutting against the second cam 422. The damping principle of the third cam and the first cam 431 is the same as that shown in Figures 11 and 13, and similarly, the damping principle of the fourth cam and the second cam 422 is also the same as that shown in Figures 11 and 13.

[0210] In this case, the first damping member 60 includes at least two first pins 63. One first pin 63 is slidably connected to the third cam, and the other first pin 63 is slidably connected to the fourth cam.

[0211] In some embodiments, the first swing arm 40A does not include the third rotating member 43 , and the second rotating member 42 has a second cam 422 on the side away from the second protrusion 421 . The first damping member 60 abuts against the second cam 422 to apply resistance to the second plate 46 .

[0212] Continuing with reference to FIG. 6 , in some embodiments, the rotating assembly 40 further includes a second damping member 70 .

[0213] The second damping member 70 is slidably connected to the fifth rotating member 48 and the sixth rotating member 49 on the side close to the first damping member 60. When the first plate 45 drives the fifth rotating member 48 to rotate and the second plate 46 drives the sixth rotating member 49 to rotate, the second damping member 70 is used to apply resistance to the first plate 45 and the second plate 46.

[0214] In some embodiments, the structure of the second damping member 70 is the same as that of the first damping member 60, and the way in which the second damping member 70 abuts against the fifth rotating member 48 and the sixth rotating member 49 is the same as the way in which the first damping member 60 abuts against the third rotating member 43 and the second rotating member 42. Please refer to the above relevant description and will not repeat it here.

[0215] For example, the fifth rotating member 48 and the sixth rotating member 49 have a fifth cam and a sixth cam respectively on the side facing the first damping member 60 .

[0216] Synchronously, the second damping member 70 includes a second integrated cam, a second elastic portion and a second pin shaft.

[0217] The second connected cam is sleeved on the end of the second pin away from the first damping member 60 and abuts against the fifth cam and the sixth cam. The second elastic part is sleeved on the second pin and is located on the side of the second connected cam away from the fifth cam and the sixth cam.

[0218] In the embodiment of the present application, the inner shaft 20 and the outer shaft 30 included in the rotating shaft mechanism 2 also include a structure matching the rotating assembly 40 .

[0219] Please refer back to Figures 4A and 4B. In some embodiments, the inner shaft 20 has a first arc-shaped protrusion 21 and a second arc-shaped protrusion 22 on the side facing the first rotating member 41 and the second rotating member 42, and the outer shaft 30 has a first arc-shaped recessed portion 31 and a second arc-shaped recessed portion 32 on the side facing the first rotating member 41 and the second rotating member 42.

[0220] The first arc-shaped protrusion 21 and the first arc-shaped recess 31 form a first arc-shaped groove U1, and the second arc-shaped protrusion 22 and the second arc-shaped recess 32 form a second arc-shaped groove U2. The first rotating member 41 can rotate in the first arc-shaped groove U1, and the second rotating member 42 can rotate in the second arc-shaped groove U2.

[0221] Based on this, in some embodiments, the first rotating member 41 and the second rotating member 42 are arc-shaped structures.

[0222] The embodiment of the present application does not limit the arc radii of the first arc-shaped protrusion 21 and the second arc-shaped protrusion 22, the first arc-shaped recessed portion 31 and the second arc-shaped recessed portion 32, and the first rotating member 41 and the second rotating member 42, and can be set according to the size of the rotating shaft mechanism 2.

[0223] In some embodiments, the inner shaft 20 has a third arcuate protrusion and a fourth arcuate protrusion on the side facing the third rotating member 43 and the fourth rotating member 44, respectively, and the outer shaft 30 has a third arcuate recess and a fourth arcuate recess. The third arcuate protrusion and the third arcuate recess form a third arcuate groove, and the fourth arcuate protrusion and the fourth arcuate recess form a fourth arcuate groove. The third rotating member 43 can rotate within the third arcuate groove, and the fourth rotating member 44 can rotate within the fourth arcuate groove.

[0224] In some embodiments, the inner shaft 20 has a fifth arcuate protrusion and a sixth arcuate protrusion on the side facing the fifth rotating member 48 and the sixth rotating member 49, respectively, and the outer shaft 30 has a fifth arcuate recess and a sixth arcuate recess. The fifth arcuate protrusion and the fifth arcuate recess form a fifth arcuate groove, and the sixth arcuate protrusion and the sixth arcuate recess form a sixth arcuate groove. The fifth rotating member 48 can rotate within the fifth arcuate groove, and the sixth rotating member 49 can rotate within the sixth arcuate groove.

[0225] The first arc-shaped groove U1, the second arc-shaped groove U2, the third arc-shaped groove, the fourth arc-shaped groove, the fifth arc-shaped groove, and the sixth arc-shaped groove can be a quarter arc, a third arc, etc. Those skilled in the art can adapt and adjust the specific parameters of the arc-shaped groove according to actual needs, and this application does not make specific limitations on this.

[0226] In the embodiment of the present application, the first rotating member 41 cooperates with the first arc-shaped groove U1, the third rotating member 43 cooperates with the third arc-shaped groove, and the fifth rotating member 48 cooperates with the fifth arc-shaped groove to enable the first plate 45 to rotate relative to the inner shaft 20. The second rotating member 42 cooperates with the second arc-shaped groove U2, the fourth rotating member 44 cooperates with the fourth arc-shaped groove, and the sixth rotating member 49 cooperates with the sixth arc-shaped groove to enable the second plate 46 to rotate relative to the inner shaft 20.

[0227] In other embodiments, the first plate 45 and the inner shaft 20, and the second plate 46 and the inner shaft 20 may be rotatably connected in other ways, such as a pin connection. Then, the first rotating member 41 and the fourth rotating member 44 may be, for example, pins.

[0228] The structures of the inner shaft 20 and the outer shaft 30 , and the cooperation between the inner shaft 20 and the outer shaft 30 and the rotating assembly 40 are schematically described below.

[0229] Here, the inner shaft 20 and the cooperation between the inner shaft 20 and the rotating assembly 40 are first introduced.

[0230] In some embodiments, as shown in FIG. 5 , the inner shaft 20 includes a first surface b1 facing away from the rotating assembly 40 and a second surface b2 facing the rotating assembly 40 .

[0231] In some embodiments, the first surface b1 of the inner shaft 20 facing away from the rotating assembly 40 is a plane.

[0232] After the hinge mechanism 2 is applied to the electronic device 1, the display screen of the electronic device 1 is disposed on the first surface b1 of the inner shaft 20. By configuring the first surface b1 of the inner shaft 20 as a flat surface, the hinge mechanism 2 has a flat surface for support throughout the entire folding process, protecting the display screen and improving screen reliability.

[0233] The outer contour of the inner shaft 20 is shown in Figure 5 for illustrative purposes only and is not intended to be limiting. The outer contour of the inner shaft 20 mates with the rotating assembly 40 , with the first and second flat plates 45 and 46 extending outward from the inner shaft 20 . The inner shaft 20 does not affect the rotation of the first and second flat plates 45 and 46 .

[0234] Figure 15 is a schematic diagram of the structure of an inner shaft provided in an embodiment of the present application. Figure 16 is a schematic diagram of the structure of an inner shaft and a rotating assembly provided in an embodiment of the present application in a flattened state after assembly. Figure 17 is a schematic diagram of the structure of an inner shaft and a rotating assembly provided in an embodiment of the present application in a folded state after assembly.

[0235] In some embodiments, in combination with Figures 15, 16 and 17, the second surface b2 of the inner shaft 20 facing the rotating component 40 has a first arc-shaped protrusion 21 and a second arc-shaped protrusion 22, the position and shape of the first arc-shaped protrusion 21 match the first rotating part 41, and the position and shape of the second arc-shaped protrusion 22 match the second rotating part 42.

[0236] The second surface b2 of the inner shaft 20 may also have a third arc-shaped protrusion 23 and a fourth arc-shaped protrusion 24. The position and shape of the third arc-shaped protrusion 23 match the third rotating part 43, and the position and shape of the fourth arc-shaped protrusion 24 match the fourth rotating part 44.

[0237] The second surface b2 of the inner shaft 20 may also have a fifth arc-shaped protrusion 25 and a sixth arc-shaped protrusion 26. The position and shape of the fifth arc-shaped protrusion 25 match the fifth rotating part 48, and the position and shape of the sixth arc-shaped protrusion 26 match the sixth rotating part 49.

[0238] In some embodiments, the inner shaft 20 further includes a first assembly opening 20a disposed between the first arc-shaped protrusion 21 and the second arc-shaped protrusion 22, and a first assembly opening 20a disposed between the third arc-shaped protrusion 23 and the fourth arc-shaped protrusion 24. The first assembly opening 20a is used for assembly and connection with the outer shaft 30. Third assembly openings 40a are disposed at corresponding positions between the first rotating member 41 and the fourth rotating member 44 of the rotating assembly 40, and third assembly openings 40a are disposed at corresponding positions between the third rotating member 43 and the second rotating member 42. After the rotating shaft mechanism 2 is assembled, the first assembly opening 20a can extend into the third assembly opening 40a.

[0239] In some embodiments, the inner shaft 20 further includes an end appearance piece 20 b , and the end appearance piece 20 b is connected to the first arc-shaped protrusion 21 .

[0240] By setting the end appearance part 20b, the internal structure of the rotating shaft mechanism 2 can be covered by the inner end appearance part 20b. Regardless of whether the rotating shaft mechanism 2 is in a folded state or in a flattened state, the internal structure is hidden, and the appearance of the entire structure is complete and beautiful.

[0241] In some embodiments, the other end of the inner shaft 20 is also provided with an end appearance part 20 b, which is not shown in FIG. 15 .

[0242] The embodiment of the present application does not limit the structure and shape of the end appearance part 20b, and FIG15 is only a schematic diagram.

[0243] Please continue to refer to Figure 15. In some embodiments, a first guide portion 20c is provided on the side of the inner shaft 20 facing the second surface b2 of the linkage structure 47. The first guide portion 20c can guide the first translation member 471 in the linkage structure 47 to move in a direction parallel to the second direction X.

[0244] In some embodiments, a second guide portion 20 d is provided on the side of the inner shaft 20 facing the second surface b2 of the linkage structure 47 . The second guide portion 20 d can guide the second translation member 472 to move in a direction parallel to the second direction X.

[0245] By providing the first guide portion 20 c and the second guide portion 20 d , the first translation member 471 and the second translation member 472 can move linearly along the second direction X in a balanced and stable manner.

[0246] In some embodiments, the first guide portion 20c is a groove extending along the second direction X.

[0247] In other embodiments, the first guide portion 20c is a protrusion extending along the second direction X.

[0248] In some embodiments, as shown in FIG. 15 , the first guide portion 20 c includes a first guide groove 20 c 1 and a first guide protrusion 20 c 2 extending along the second direction X. The first guide groove 20 c 1 and the first guide protrusion 20 c 2 are sequentially arranged along the second direction X.

[0249] By setting the first guide part 20c to be a structure in which one part is the first guide groove 20c1 and the other part is the first guide protrusion 20c2, it is possible to avoid the inner shaft 20 being thinned too much at the position where the first conductive part 20c is set, thereby affecting the rigidity of the inner shaft 20, and it is also possible to avoid affecting the first rotating part 41 from driving the first translation part 471 to slide.

[0250] As shown in Figures 8, 15, 16, and 17, the first translating member 471 has a groove 471a disposed on the side facing the first guide protrusion 20c2. The first guide protrusion 20c2 can extend into the groove 471a. The first guide protrusion 20c2 cooperates with the groove 471a. When the first translating member 471 moves in the second direction X, the groove 471a slides on the first guide protrusion 20c2, and the first guide protrusion 20c2 serves as a guide for the first translating member 471.

[0251] In some embodiments, the first guide groove 20c1 is disposed near the first flat plate 45 and is adjacent to the first rotating member 41 (first arc-shaped protrusion 21) along the third direction Y. The first guide protrusion 20c2 is disposed near the second flat plate 46 and is adjacent to the fourth rotating member 44 (fourth arc-shaped protrusion 24) along the third direction Y.

[0252] In this way, when the first rotating member 41 includes the first protrusion 411 , the first guide groove 20 c 1 does not affect the rotation of the first protrusion 411 .

[0253] In some embodiments, the surface of the first guide groove 20c1 near the first arc-shaped protrusion 21 is a curved surface, and the trajectory of the curved surface matches the rotation trajectory of the first protrusion 411. In this way, the groove arm of the first guide groove 20c1 can provide support for the first protrusion 411, thereby enhancing the stability of the first protrusion 411 during rotation and preventing the first protrusion 411 from shaking and affecting folding.

[0254] In some embodiments, the structure of the second guide portion 20d is the same as that of the first guide portion 20c.

[0255] For example, the second guide portion 20d includes a second guide groove and a second guide protrusion extending along the second direction X. For example, the second guide groove is disposed near the second flat plate 46 and adjacent to the second rotating member 42 (the second arc-shaped protrusion 22), and the second guide protrusion is disposed near the first flat plate 45 and adjacent to the third rotating member 43 (the third arc-shaped protrusion 23).

[0256] Correspondingly, as shown in FIG8 , a groove 472 a is provided on the side of the second translation member 472 facing the first surface a1 of the first guide portion 20 c , and the second guide protrusion can extend into the groove 472 a .

[0257] Continuing with reference to FIG. 15 , in some embodiments, a first limiting portion 20 e and a second limiting portion 20 f are provided on the side of the inner shaft 20 facing the second surface b2 of the linkage structure 47 .

[0258] The first limiting portion 20e and the second limiting portion 20f are arranged between the first guide portion 20c and the second guide portion 20d. Along the second direction X, the first limiting portion 20e and the second limiting portion 20f are located on both sides of the inner shaft 20. As shown in Figures 16 and 17, after the rotating assembly 40 is assembled with the inner shaft 20, the first limiting portion 20e and the second limiting portion 20f are located on both sides of the rotating member 473.

[0259] The surface of the first limiting portion 20e facing the second limiting portion 20f and the surface of the second limiting portion 20f facing the first limiting portion 20e are both arcuate surfaces. In other words, the surfaces of the first limiting portion 20e and the second limiting portion 20f facing the rotating member 473 are arcuate surfaces. The first limiting portion 20e and the second limiting portion 20f match the rotation trajectory of the rotating member 473, confining the rotating member 473 therebetween, thereby defining the rotation trajectory of the rotating member 473.

[0260] The arc surfaces of the first limiting portion 20e and the second limiting portion 20f facing the rotating member 473 can be one-quarter arc surfaces, one-third arc surfaces, or arc surfaces of other curvatures.

[0261] In addition, the shapes of the first limiting portion 20e and the second limiting portion 20f shown in Figure 15 are only for reference and are not limited in any way, as long as the surfaces of the first limiting portion 20e and the second limiting portion 20f facing the rotating member 473 match the rotation trajectory of the rotating member 473.

[0262] 15 to 17 , in some embodiments, a first assembly opening 20 a is provided between the first limiting portion 20 e and the second limiting portion 20 f , and the rotating member 473 is sleeved on the first assembly opening 20 a .

[0263] The outer contour of the first assembly opening 20a at this position matches the shape of the reserved hole of the rotating member 473. For example, the first assembly opening 20a is a cylindrical hole. After the assembly screw is inserted into the first assembly opening 20a, the rotating member 473 is sleeved on the assembly screw.

[0264] In some embodiments, a first matching portion 20 h is provided on the side of the inner shaft 20 facing the second surface b2 of the linkage structure 47 , and the first damping member 60 is provided in coordination with the first matching portion 20 h .

[0265] For example, the first matching portion 20h includes a first cam matching portion 20h1 and a first elastic member matching portion 20h2. The first cam matching portion 20h1 matches the shape of the first connected cam 61. The first elastic member matching portion 20h2 matches the shape of the first elastic portion 62 and the first pin shaft 63. The end of the first pin shaft 63 away from the first connected cam 61 abuts against the inside of the first elastic member matching portion 20h2.

[0266] In the embodiment of the present application, the first damping member 60 is illustrated by an example including four first elastic portions 62 . Simultaneously, the first elastic member matching portion 20h2 is illustrated by an example including four grooves.

[0267] In some embodiments, a second matching portion 20 i is provided on the side of the inner shaft 20 facing the second surface b2 of the linkage structure 47 , and the second damping member 70 is provided in coordination with the second matching portion 20 i .

[0268] The structure of the second matching portion 20i may refer to the first matching portion 20h, and is not limited in this embodiment of the present application.

[0269] In some embodiments, a first assembly opening 20a is further provided between the first matching portion 20h and the second matching portion 20i. Of course, the first assembly opening 20a on the inner shaft 20 is reasonably provided according to the structure of the rotating shaft mechanism 2.

[0270] FIG18 is a schematic structural diagram of an inner shaft provided in an embodiment of the present application.

[0271] Figure 15 shows a schematic structural diagram of the inner shaft 20 cooperating with a rotating assembly 40. When the rotating shaft mechanism 2 includes multiple rotating assemblies 40, as shown in Figure 18, the inner shaft 20 may include multiple shaft segments 27 that match the rotating assemblies 40.

[0272] In some embodiments, as shown in Figure 18, the inner shaft 20 further includes a first connecting portion 20j, through which two adjacent shaft segments 27 are connected. The present embodiment does not limit the structure of the first connecting portion 20j, and it can be reasonably configured in combination with the structure of the rotating shaft mechanism 2.

[0273] For example, the first connecting portion 20j includes a first assembly opening 20a.

[0274] In some embodiments, the first assembly openings 20 a on the inner shaft 20 are provided in pairs. Alternatively, the first assembly openings 20 a on the inner shaft 20 are located on the center line of the inner shaft 20 .

[0275] In this way, after the inner shaft 20 and the outer shaft 30 are assembled, the force applied at the position of the first assembly opening 20 a is symmetrical to the entire rotating shaft mechanism 2 , thereby improving the symmetry of the first plate 45 and the second plate 46 .

[0276] Next, the structure of the outer shaft 30 and the cooperation between the outer shaft 30 and the rotating assembly 40 are schematically described.

[0277] In some embodiments, as shown in FIG. 5 , the outer shaft 30 includes a first surface c1 facing the rotation assembly 40 and a second surface c2 facing away from the rotation assembly 40 .

[0278] FIG19A is a schematic structural diagram of an outer shaft provided in an embodiment of the present application.

[0279] In some embodiments, as shown in Figure 19A, the first surface c1 of the outer shaft 30 facing the rotating component 40 has a first arc-shaped recess 31 and a second arc-shaped recess 32, the position and shape of the first arc-shaped recess 31 match the first rotating member 41, and the position and shape of the second arc-shaped recess 32 match the second rotating member 42.

[0280] The first arc-shaped recessed portion 31 and the first arc-shaped raised portion 21 are stacked to form a first arc-shaped groove, in which the first rotating member 41 rotates. The second arc-shaped recessed portion 32 and the second arc-shaped raised portion 22 are stacked to form a second arc-shaped groove, in which the second rotating member 42 rotates.

[0281] The first surface c1 of the outer shaft 30 facing the rotating assembly 40 may also have a third arc-shaped recessed portion 33 and a fourth arc-shaped recessed portion 34. The position and shape of the third arc-shaped recessed portion 33 match the third rotating member 43, and the position and shape of the fourth arc-shaped recessed portion 34 match the fourth rotating member 44.

[0282] The first surface c1 of the outer shaft 30 may further have a fifth arc-shaped recess 35 and a sixth arc-shaped recess 36 . The position and shape of the fifth arc-shaped recess 35 match the fifth rotating member 48 , and the position and shape of the sixth arc-shaped recess 36 match the sixth rotating member 49 .

[0283] In some embodiments, the outer shaft 30 further includes a second assembly opening 30a between the first arc-shaped recessed portion 31 and the fourth arc-shaped recessed portion 34, and a second assembly opening 30a between the third arc-shaped recessed portion 33 and the second arc-shaped recessed portion 32. The second assembly opening 30a is used for assembly with the inner shaft 20.

[0284] In some embodiments, the outer shaft 30 further includes an end fitting 30 b connected to the first arc-shaped recess 31 and the second arc-shaped recess 32 for assembly with the end appearance part 20 b of the inner shaft 20 .

[0285] In some embodiments, a first translator mating portion 30c and a second translator mating portion 30d are disposed on the side of the outer shaft 30 facing the first surface c1 of the linkage structure 47. The first translator mating portion 30c, when aligned with the first conductive portion 20c, only leaves sufficient space for movement of the first translator 471. The second translator mating portion 30d, when aligned with the second conductive portion 20d, only leaves sufficient space for movement of the second translator 472.

[0286] For example, along the second direction X, part of the first translation member matching portion 30c is a plane and part of it is a groove. Similarly, along the second direction X, part of the second translation member matching portion 30d is a plane and part of it is a groove.

[0287] In some embodiments, a third limiting portion 30 e and a fourth limiting portion 30 f are provided on the side of the outer shaft 30 facing the first surface c1 of the linkage structure 47 .

[0288] The third limiting portion 30e and the fourth limiting portion 30f are arranged between the first translation member matching portion 30c and the second translation member matching portion 30d. Along the second direction X, the third limiting portion 30e and the fourth limiting portion 30f are located on both sides of the outer shaft 30. After the rotating assembly 40 is assembled with the outer shaft 30, the third limiting portion 30e and the fourth limiting portion 30f are located on both sides of the rotating member 473.

[0289] The surface of the third limiting portion 30e facing the fourth limiting portion 30f and the surface of the fourth limiting portion 30f facing the third limiting portion 30e are both arcuate surfaces. In other words, the surfaces of the third limiting portion 30e and the fourth limiting portion 30f facing the rotating member 473 are arcuate surfaces. The third limiting portion 30e and the fourth limiting portion 30f match the rotation trajectory of the rotating member 473, confining the rotating member 473 therebetween, thereby defining the rotation trajectory of the rotating member 473.

[0290] The arc surface of the third limiting portion 30e and the fourth limiting portion 30f facing the rotating member 473 can be a quarter arc surface, a third arc surface, or an arc surface of other curvatures.

[0291] In addition, the shapes of the third limiting portion 30e and the fourth limiting portion 30f shown in Figure 19A are only for reference and are not limited in any way, as long as the surfaces of the third limiting portion 30e and the fourth limiting portion 30f facing the rotating member 473 match the rotation trajectory of the rotating member 473.

[0292] 19A , in some embodiments, a second assembly opening 30a is provided between the third limiting portion 30e and the fourth limiting portion 30f, and a rotating member 473 (not shown in FIG. 19A ) is sleeved on the second assembly opening 30a.

[0293] The outer contour of the second assembly opening 30a at this position matches the shape of the reserved hole of the rotating member 473. For example, the second assembly opening 30a is a cylindrical hole. After the assembly screw is inserted into the second assembly opening 30a, the rotating member 473 is sleeved on the assembly screw.

[0294] Continuing with Figure 19A , in some embodiments, a third matching portion 30h is provided on the side of the outer shaft 30 facing the first surface c1 of the linkage structure 47. As shown in Figure 19B , a first damping member 60 is positioned within and mated with the third matching portion 30h. The first damping member 60 also mates with the first matching portion 20h of the inner shaft 20 . The first matching portion 20h and the third matching portion 30h mate to form a space within which the first damping member 60 can rotate.

[0295] In some embodiments, a fourth matching portion 30i is provided on the side of the outer shaft 30 facing the first surface c1 of the linkage structure 47. The second damping member 70 is configured to cooperate with the fourth matching portion 30i. After the second matching portion 20i and the fourth matching portion 30i mate, the second damping member 70 can rotate within the mating space. The structure of this structure can be referred to the above description regarding the rotation of the first damping member 60 within the mating space.

[0296] In some embodiments, a second assembly opening 30a is further provided between the third matching portion 30h and the fourth matching portion 30i. Of course, the second assembly opening 30a on the outer shaft 30 is reasonably provided according to the structure of the rotating shaft mechanism 2.

[0297] FIG19A shows a schematic structural diagram of the outer shaft 30 and a rotating assembly 40 . When the rotating shaft mechanism 2 includes multiple rotating assemblies 40 , the outer shaft 30 may include multiple shaft segments that match the rotating assemblies 40 .

[0298] In some embodiments, as shown in FIG19A , the outer shaft 30 further includes a second connecting portion 30 j , and two adjacent shaft segments are connected by the first connecting portion 30 j . The present embodiment does not limit the structure of the second connecting portion 30 j , and can be reasonably configured in combination with the structure of the rotating shaft mechanism 2 .

[0299] For example, the second connecting portion 30 j includes a second assembly opening 30 a .

[0300] FIG20 is a schematic diagram of the structure after the inner shaft, rotating assembly, and outer shaft are assembled according to an embodiment of the present application.

[0301] As shown in Figure 20, after the inner shaft 20 and the outer shaft 30 are assembled, most of the components in the rotating assembly 40 are located in the mating space formed by the inner shaft 20 and the outer shaft 30. The first plate 45 and the second plate 46 in the rotating assembly 40 extend out of the mating space and can rotate relative to the inner shaft 20.

[0302] In some embodiments, as shown in FIG. 5 , the rotating shaft mechanism 2 further includes a decorative cover 50 . The decorative cover 50 is located on a side of the rotating assembly 40 (or the outer shaft 30 ) away from the inner shaft 20 and is connected to the inner shaft 20 .

[0303] By providing the decorative cover 50, the internal structure of the hinge mechanism 2 is concealed, whether in the folded or flattened state, thereby enhancing the aesthetic appearance of the hinge mechanism 2. When the hinge mechanism 2 is used in the electronic device 1, when the first housing 11 and the second housing 12 are in the folded state, the decorative cover of the hinge mechanism 2 is exposed, closing the gap between the first housing 11 and the second housing 12, thereby ensuring the aesthetic appearance of the electronic device 1. In other words, whether the electronic device 1 is in the closed or flattened state, the internal structure is concealed, and the overall structure maintains a complete and aesthetically pleasing appearance.

[0304] The embodiment of the present application further provides an electronic device 1 , and any one of the various implementations of the hinge mechanisms 2 described above can be applied to the electronic device 1 provided in the embodiment of the present application.

[0305] FIG21 is an exploded view of an electronic device 1 provided in an embodiment of the present application.

[0306] In some embodiments, taking a bifold electronic device as an example, as shown in FIG21 , the electronic device 1 includes a first housing 11, a second housing 12, a hinge mechanism 2, and a display screen 3. The first housing 11 and the second housing 12 are located on either side of the hinge mechanism 2, and the hinge mechanism 2 is connected to the first housing 11 and the second housing 12, respectively.

[0307] The embodiment of the present application does not limit the structure and shape of the first shell 11 and the second shell 12 , and the structure of the shell in the related art is applicable to the embodiment of the present application.

[0308] In some embodiments, the first housing 11 is provided with a first groove 111 , the second housing 12 is provided with a second groove 121 , the first plate 45 of the hinge mechanism 2 is installed in the first groove 111 , and the second plate 46 is installed in the second groove 121 .

[0309] In some embodiments, the hinge mechanism 2 and the first groove 111 and the second groove 121 can be connected by screws or the like. For example, the first plate 45 in the hinge mechanism 2 is connected to the first groove 111 by screws, and the second plate 46 in the hinge mechanism 2 is connected to the second groove 121 by screws.

[0310] In some embodiments, the display screen 3 is disposed on the first shell 11 and the second shell 12. Therefore, the first shell 11 and the second shell 12 are also used to support the display screen 3, that is, the display screen 3 is fixedly connected (e.g., glued) to the first shell 11 and the second shell 12, so that the display screen 3 remains as flat as possible during use and the non-display surface of the display screen 3 is protected.

[0311] For example, the first shell 11 includes a first surface C1, the second shell 12 includes a second surface C2, the hinge mechanism 2 includes a third surface C3 located on the side of the inner shaft 20 away from the rotating assembly 40, the display screen 3 continuously covers the first surface C1, the third surface C3 and the second surface C2, and the display screen 3 is fixedly connected to the first surface C1 of the first shell 11 and the second surface C2 of the second shell 12 respectively.

[0312] The display screen 3 is, for example, a flexible screen, which is used to display images, videos, etc. The embodiment of the present application does not limit the specific type of flexible screen. For example, the flexible screen can be an active matrix organic light-emitting diode or an active matrix organic light-emitting diode (AMOLED) display screen. As a self-luminous display screen, the AMOLED display screen does not require a backlight module (BLM). Therefore, when the base substrate in the AMOLED display screen is made of a flexible resin material, such as polyethylene terephthalate (PET), the AMOLED display screen can have a bendable property. For example, the flexible screen can also be an organic light-emitting diode (OLED) display screen, a mini organic light-emitting diode (MiNi OLED) display screen, a micro organic light-emitting diode (Mic OLED) display screen, a micro organic light-emitting diode (micro organic light-emitting diode) display screen, a quantum dot light-emitting diode (QLED) display screen, etc.

[0313] For example, as shown in FIG. 21 , the display screen 3 may include a first portion 301 , a second portion 302 , and a third portion 303 , a fourth portion 304 , and a fifth portion 305 located therebetween.

[0314] The first portion 301 corresponds to and is connected to the first housing 11, the second portion 22 corresponds to and is connected to the second housing 12, and the third portion 303, fourth portion 304, and fifth portion 305 correspond to the hinge mechanism 2. When the hinge mechanism 2 is folded, the third portion 303, fourth portion 304, and fifth portion 305 are folded. When the hinge mechanism 2 is unfolded, the third portion 303, fourth portion 304, and fifth portion 305 are unfolded.

[0315] For example, the third portion 303 corresponds to the first flat plate 45 of the rotating shaft mechanism 2 , the opposite portion 304 corresponds to the second flat plate 46 of the rotating shaft mechanism 2 , and the fifth portion 305 corresponds to the inner shaft 20 of the rotating shaft mechanism 2 .

[0316] In some embodiments, there is no fixed connection between the third portion 303 and the first plate 45 , there is no fixed connection between the fourth portion 304 and the second plate 46 , and there is no fixed connection between the fifth portion 305 and the inner shaft 20 .

[0317] In other embodiments, the third portion 303 is fixedly connected to the first plate 45 (for example, it can be adhered), the fourth portion 304 is fixedly connected to the second plate 46 (for example, it can be adhered), and there is no fixed connection between the fifth portion 305 and the inner shaft 20.

[0318] In the embodiment of the present application, when the third portion 303 is fixedly connected to the first flat panel 45 and the fourth portion 304 is fixedly connected to the second flat panel 46, during the folding or unfolding process of the electronic device 1, the third portion 303 can move with the first flat panel 45 and the fourth portion 304 can move with the second flat panel 46, that is, there is no relative movement between the third portion 303 and the first flat panel 45, and there is no relative movement between the fourth portion 304 and the second flat panel 46, thereby improving the flatness of the third portion 303 and the fourth portion 304 of the display screen 3 during the unfolding and folding process and reducing the risk of failure of the display screen 3.

[0319] FIG22 and FIG23 are schematic diagrams showing the usage status of an electronic device 1 provided in an embodiment of the present application.

[0320] When the electronic device 1 is in use, the hinge mechanism 2 at least includes an unfolded state shown in FIG. 22 and a folded state shown in FIG. 23 .

[0321] In this unfolded state, the first shell 11 and the second shell 12 are approximately in the same plane, making the display screen 3 (not shown in Figure 22) approximately flat. At this time, the display screen 3 is exposed, and the user can operate the display screen 3. The display screen 3 can also display images or videos and other information, thereby achieving a large-screen display and improving the user's viewing experience. When the hinge mechanism 2 is in the unfolded state, the first shell 11 and the second shell 12 can rotate toward each other (i.e., the first shell 11 and the second shell 12 rotate relative to each other), thereby driving the hinge mechanism 2 to fold.

[0322] During the folding process, as shown in FIG23 , the ends of the first housing 11 and the second housing 12 away from the hinge mechanism 2 approach each other, allowing the electronic device 1 to be rotated to a folded state. The folded state can be folded to a certain angle as shown in FIG23 , or folded to a completely aligned state as shown in FIG24 .

[0323] As shown in Figure 24, in the folded state, the display screen 3 is located in the space enclosed by the folded first shell 11 and the second shell 12. At this time, the display screen 3 is not exposed, the user cannot operate the display screen 3, and the electronic device 1 is easy to store and carry. When the hinge mechanism 2 is in the folded state, the first shell 11 and the second shell 12 can rotate (the rotation direction is opposite to the rotation direction when folded), thereby driving the hinge mechanism 2 to unfold, so that the electronic device 1 is in the unfolded state shown in Figure 22. Therefore, in this application, the hinge mechanism 2 is used to achieve the folding and unfolding of the electronic device 1.

[0324] The third surface C3 of the hinge mechanism 2 provided in the embodiment of the present application, which is located on the inner axis 20 and faces the display screen 3, is a plane. During the transition of the hinge mechanism 2 between the folded state and the flattened state, the third surface C3 always provides a planar support for the display screen 3, which can protect the display screen 3 and improve the reliability of the display screen 3.

[0325] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0326] The above is only a specific embodiment of the present application, but the scope of protection of this application is not limited to this. Any changes or substitutions within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A rotating shaft mechanism, characterized in that: include: An inner shaft (20) and an outer shaft (30) that are detachably connected; A rotating assembly (40) is disposed between the inner shaft (20) and the outer shaft (30); The rotating assembly (40) comprises a first swing arm (40A), a second swing arm (40B) and a linkage structure (47); The linkage structure (47) comprises a first translation member (471), a second translation member (472) and a rotation member (473); The first translation member (471) is slidably connected to the inner shaft (20) and is clamped to the first swing arm (40A); the second translation member (472) is slidably connected to the inner shaft (20) and is clamped to the second swing arm (40B); the rotating member (473) connects the first translation member (471) and the second translation member (472) and is rotatably connected to the inner shaft (20); the rotation axis of the rotating member (473) is parallel to a first direction (Z), and the first direction (Z) is a direction from the inner shaft (20) to the outer shaft (30); During the transformation of the rotating shaft mechanism from the flattened state to the folded state, the first swing arm (40A) and the second swing arm (40B) rotate relative to each other along the rotation axis of the rotating shaft mechanism, driving the first translation member (471) and the second translation member (472) to slide in opposite directions along a direction parallel to the second direction (X); when the first translation member (471) and the second translation member (472) slide, they drive the rotating member (473) to rotate; The second direction (X) intersects both the direction of the rotation axis and the first direction (Z), and the first direction (Z) is perpendicular to the direction of the rotation axis.

2. The rotating shaft mechanism according to claim 1, characterized in that: The first swing arm (40A) comprises a first rotating member (41) and a first plate (45) which are fixedly connected; the second swing arm (40B) comprises a second rotating member (42) and a second plate (46) which are fixedly connected; Along the direction of the rotation axis, the first rotating member (41) and the second rotating member (42) are located on both sides of the linkage structure (47); along the second direction (X), the first flat plate (45) and the second flat plate (46) are located on both sides of the linkage structure (47); The first flat plate (45) can drive the first rotating member (41) to rotate relative to the inner shaft (20); and the second flat plate (46) can drive the second rotating member (42) to rotate relative to the inner shaft (20).

3. The rotating shaft mechanism according to claim 2, characterized in that: The first translation member (471) includes a first recessed portion (4711) that is recessed away from the first rotating member (41), and the first rotating member (41) includes a first protruding portion (411) that protrudes toward the first translation member (471), and the first protruding portion (411) is cooperatively connected with the first recessed portion (4711) to achieve the first translation member (471) being driven to move during the rotation of the first rotating member (41); and / or, The second translation member (472) includes a second recessed portion (4721) that is recessed away from the second rotating member (42), and the second rotating member (42) includes a second protruding portion (421) that protrudes toward the second translation member (472). The second protruding portion (421) is cooperatively connected with the second recessed portion (4721) to achieve the movement of the second translation member (472) during the rotation of the second rotating member (42).

4. The rotating shaft mechanism according to claim 3, characterized in that: The first protruding portion (411) is located at an end of the first rotating member (41) away from the first flat plate (45), and the first recessed portion (4711) is located at an end of the first translating member (471) close to the first flat plate (45); and / or, The second protruding portion (421) is located at an end of the second rotating member (42) away from the second flat plate (46), and the second recessed portion (4721) is located at an end of the second translatory member (472) close to the second flat plate (46).

5. The rotating shaft mechanism according to any one of claims 2 to 4, characterized in that: The first swing arm (40A) further comprises a third rotating member (43), the third rotating member (43) being fixedly connected to the first plate (45), the third rotating member (43) and the first rotating member (41) being arranged on opposite sides of the linkage structure (47); the first plate (45) can also drive the third rotating member (43) to rotate relative to the inner shaft (20); The second swing arm (40B) further comprises a fourth rotating member (44), the fourth rotating member (44) being fixedly connected to the second flat plate (46), the fourth rotating member (44) and the second rotating member (42) being arranged on opposite sides of the linkage structure (47); the second flat plate (46) can also drive the fourth rotating member (44) to rotate relative to the inner shaft (20).

6. The rotating shaft mechanism according to any one of claims 1 to 5, characterized in that: The rotating member (473) includes a gear, the first translating member (471) includes a first rack, and the second translating member (472) includes a second rack, and the first rack and the second rack are respectively meshed with the gear.

7. The rotating shaft mechanism according to any one of claims 1 to 6, characterized in that: A first guide portion (20c) is provided on the side of the inner shaft (20) facing the linkage structure (47), and the first guide portion (20c) is capable of guiding the first translation member (471) to move in a direction parallel to the second direction (X); and / or, A second guide portion (20d) is provided on the side of the inner shaft (20) facing the linkage structure (47), and the second guide portion (20d) can guide the second translation member (472) to move in a direction parallel to the second direction (X).

8. The rotating shaft mechanism according to claim 7, characterized in that: The first guide portion (20c) comprises a first guide groove (20c1) and a first guide protrusion (20c2) extending along the second direction (X); the first guide groove (20c1) is arranged close to the first flat plate (45), and the first guide protrusion (20c2) is arranged close to the second flat plate (46); and / or, The second guide portion (20d) comprises a second guide groove and a second guide protrusion extending along the second direction (X); the second guide groove is arranged close to the second flat plate (46), and the second guide protrusion is arranged close to the first flat plate (45).

9. The rotating shaft mechanism according to any one of claims 1 to 8, characterized in that: A first limiting portion (20e) and a second limiting portion (20f) are provided on the side of the inner shaft (20) facing the linkage structure (47); Along the second direction (X), the first limiting portion (20e) and the second limiting portion (20f) are located on two opposite sides of the rotating member (473); the surfaces of the first limiting portion (20e) and the second limiting portion (20f) facing the rotating member (473) are arc surfaces, and are slidably connected to the rotating member (473).

10. The rotating shaft mechanism according to any one of claims 1 to 9, characterized in that: The surface of the inner shaft (20) facing away from the rotating assembly (40) is a plane.

11. The rotating shaft mechanism according to any one of claims 2 to 10, characterized in that: The inner shaft (20) has a first arc-shaped protrusion (21) and a second arc-shaped protrusion (22) on the side facing the first rotating member (41) and the second rotating member (42), and the outer shaft (30) has a first arc-shaped recessed portion (31) and a second arc-shaped recessed portion (32) on the side facing the first rotating member (41) and the second rotating member (42); The first arc-shaped protrusion (21) and the first arc-shaped recess (31) form a first arc-shaped groove (U1), and the second arc-shaped protrusion (22) and the second arc-shaped recess (32) form a second arc-shaped groove (U2); the first rotating member (41) can move in the first arc-shaped groove (U1), and the second rotating member (42) can move in the second arc-shaped groove (U2).

12. The rotating shaft mechanism according to any one of claims 5 to 11, characterized in that: The rotating assembly (40) further comprises a first damping member (60), wherein the first damping member (60) is slidably connected to a side of the second rotating member (42) and the third rotating member (43) away from the linkage structure (47); When the first plate (45) drives the third rotating member (43) to rotate and the second plate (46) drives the second rotating member (42) to rotate, the first damping member (60) is used to apply resistance to the first plate (45) and the second plate (46).

13. The rotating shaft mechanism according to claim 12, characterized in that: The third rotating member (43) and the second rotating member (42) are respectively provided with a first cam (431) and a second cam (422) on the side facing away from the linkage structure (47); The first damping member (60) comprises a first connected cam (61), a first elastic portion (62) and a first pin shaft (63); The first connected cam (61) is sleeved on one end of the first pin shaft (63) close to the linkage structure (47), and is meshed with the first cam (431) and the second cam (422); The first integrated cam (61) is rotatably mounted on the first pin shaft (63), and the first elastic portion (62) is sleeved on the first pin shaft (63).

14. The rotating shaft mechanism according to claim 12 or 13, characterized in that: The first swing arm (40A) further comprises a fifth rotating member (48), the fifth rotating member (48) being fixedly connected to the first plate (45), the fifth rotating member (48) and the third rotating member (43) being arranged on opposite sides of the first damping member (60); the first plate (45) can also drive the fifth rotating member (48) to rotate relative to the inner shaft (20); The second swing arm (40B) further comprises a sixth rotating member (49), the sixth rotating member (49) being fixedly connected to the second flat plate (46), the sixth rotating member (49) and the second rotating member (42) being arranged on opposite sides of the first damping member (60); the second flat plate (46) can also drive the sixth rotating member (49) to rotate relative to the inner shaft (20).

15. The rotating shaft mechanism according to claim 14, characterized in that: The rotating assembly (40) further includes a second damping member (70); The second damping member (70) is slidably connected to a side of the fifth rotating member (48) and the sixth rotating member (49) close to the first damping member (60); When the first plate (45) drives the fifth rotating member (48) to rotate and the second plate (46) drives the sixth rotating member (49) to rotate, the second damping member (70) is used to apply resistance to the first plate (45) and the second plate (46).

16. An electronic device, characterized in that: include: A first shell (11), a second shell (12), a flexible screen and a hinge mechanism (2) as claimed in any one of claims 1 to 15; The first shell (11) is detachably connected to the first plate (45), and the second shell (12) is detachably connected to the second plate (46); The first shell (11) includes a first surface (B1), the second shell (12) includes a second surface (B2), the rotating shaft mechanism (2) includes a third surface (B3) located on the side of the inner shaft (20) away from the rotating assembly (40), the flexible screen continuously covers the first surface (B1), the third surface (B3) and the second surface (B2), and the flexible screen is fixedly connected to the first surface (B1) of the first shell (11) and the second surface (B2) of the second shell (12), respectively.

Images