Rotating shaft structure and folding terminal

Abstract

The embodiment of the invention provides a rotating shaft structure and a folding terminal. The opening and closing hand feeling can be improved. The rotating shaft structure is applied to the outward folding type terminal, and the outward folding type terminal comprises a first machine body, a second machine body and a rotating shaft structure connected with the first machine body and the second machine body. The rotating shaft structure comprises a shaft cover; the two connecting pieces are located on the two sides of the shaft cover and used for being connected with the first machine body and the second machine body respectively. The rotating mechanism is rotationally connected with the shaft cover, is in sliding and rotating connection with the connecting piece, and controls the movement of the connecting piece; the synchronizing mechanism is rotationally connected with the shaft cover, is in sliding and rotating connection with the connecting pieces, and is used for synchronizing the rotation of the two connecting pieces; the multiple damping mechanisms comprise convex-concave wheel damping mechanisms and / or flexible damping mechanisms; a first spring of the convex-concave wheel damping mechanism is compressed to generate axial extrusion force which acts between the concave wheel and the rotating cam so as to generate damping force; a flexible beam of the compliant damping mechanism is compressed to generate a damping force.

Description

Hinge structure and foldable terminal

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on February 16, 2023, with application number 202310165524.5 and application name “Hinge Structure and Folding Terminal”, 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 hinge structure and a foldable terminal. Background Art

[0003] With the continuous development of display technology, foldable terminals (such as foldable phones) are becoming a trend in future mobile electronic products. When unfolded, foldable terminals can provide a larger display area, improving visual effects, while when folded, they are compact and easy to carry. As a result, they are becoming more and more popular among users.

[0004] The structure that enables a foldable terminal to unfold or fold is a hinge structure, which includes a damping mechanism and a synchronization mechanism. During the unfolding or folding process, the damping mechanism provides a damping force to achieve a smooth opening and closing feel. However, existing damping mechanisms have problems such as low damping force and poor opening and closing feel.

[0005] Summary of the Invention

[0006] In order to solve the above technical problems, the present application provides a hinge structure and a foldable terminal, which can improve the damping force of the hinge structure, realize the opening and closing feel, and have a simple structure and low cost.

[0007] In a first aspect, an embodiment of the present application provides a hinge structure, which is applied to an outward-folding foldable terminal. The outward-folding foldable terminal includes a first body and a second body, and a hinge structure connecting the first body and the second body, wherein the hinge structure includes: a shaft cover; two connecting members located on both sides of the shaft cover, and used to connect to the first body and the second body respectively; a rotation mechanism, which is rotationally connected to the shaft cover and slidably and rotationally connected to the connecting member, and is used to control the movement of the connecting member; a synchronization mechanism, which is rotationally connected to the shaft cover and slidably and rotationally connected to the connecting member, and is used to synchronize the rotation of the two connecting members; multiple damping mechanisms, the multiple damping mechanisms include convex-concave wheel damping mechanisms and / or flexible damping mechanisms; the convex-concave wheel damping mechanism includes a pin, a concave wheel, a first spring and at least two damping swing arms, the pin is fixedly connected to the shaft cover, and the concave wheel and the first spring are both sleeved on the pin. ; The damping swing arm includes a rotating cam that is sleeved on the pin shaft and adjacent to and in contact with the cam, and a swinging member located on one side of the rotating cam. The swinging members of the two damping swing arms are respectively connected to the two connecting members in a sliding and rotating manner; when the swinging member and the connecting member slide and rotate, the first spring is compressed and generates an axial extrusion force, which acts between the cam and the rotating cam to generate a damping force; the flexible damping mechanism includes two flexible members, and the flexible members include a flexible swing arm and a flexible unit. The flexible units of the two flexible members are respectively fixed on the two connecting members, one end of the flexible swing arm is rotatably connected to the shaft cover, and the other end of the flexible swing arms of the two flexible members are respectively connected to the connecting members in a sliding and rotating manner; the flexible unit includes a connecting rod and a flexible beam, and the flexible swing arm is fixedly connected to the connecting rod; when the other end of the flexible swing arm slides and rotates with the connecting member, the connecting rod is driven to move, and the flexible beam is compressed to generate a damping force.

[0008] The multiple damping mechanisms in an outward-folding foldable terminal, including convex-concave wheel damping mechanisms and / or compliant damping mechanisms, can increase the damping force of the damping mechanisms. These damping mechanisms not only provide an unfolding force but also a closing force, adjusting the opening and closing feel of the hinge structure and improving the user experience. Furthermore, when the multiple damping mechanisms are convex-concave wheel damping mechanisms, the high cam surface pressure and severe wear associated with a single damping mechanism can be avoided. When the multiple damping mechanisms include a compliant damping mechanism, this helps maintain the hinge structure in its hovering, unfolded, and closed states. Furthermore, the damping mechanisms are simple in structure and low in cost.

[0009] In some possible implementations, the multiple damping mechanisms also include a lateral damping mechanism; the lateral damping mechanism includes two lateral members, the lateral members include a lateral swing arm and a lateral rotating part, the lateral rotating part is rotatably connected to the shaft cover, and the lateral swing arms of the two lateral members are respectively slidably connected to the two connecting members; a support member and a roller rotatably connected to the support member are provided in the lateral swing arm, and at least one second spring is sleeved on the support member, and the opposite ends of the second spring are respectively fixedly connected to the support member and the roller; when the angle of the plane where the two connecting members are located is within a preset angle range, the roller contacts the side wall of the shaft cover, the shaft cover squeezes the roller, and the second spring is compressed to generate a damping force.

[0010] The setting of the lateral damping mechanism improves the unfolding retention force of the rotating shaft structure through the force between the roller and the shaft cover when the rotating shaft structure is in the unfolded state, which is beneficial to the user experience, and further improves the opening and closing feel together with the convex and concave wheel damping mechanism and / or the flexible damping mechanism.

[0011] Exemplarily, the preset angle range may be, for example, 90°-180°, 120°-180°, or 150°-180°.

[0012] In some possible implementations, the rotating mechanism includes a main swing arm group; the main swing arm group includes two main swing arms arranged on both sides of the shaft cover; the main swing arm includes a first main swing part and a second main swing part that are fixedly connected, and the connecting part is provided with a first connecting groove that is adapted to the second main swing part. The main swing arm is rotatably connected to the connecting part through the second main swing part, and the shaft cover is provided with a first shaft cover groove that is adapted to the first main swing part. The main swing arm is rotatably connected to the shaft cover through the first main swing part, and the position of the shaft cover remains unchanged. The first main swing parts of the two main swing arms in the main swing arm group rotate relative to the shaft cover to drive the two connecting parts to rotate through the second main swing parts of the two main swing arms in the main swing arm group.

[0013] The main swing arm provided in this application has a simple structure, reduces the difficulty of preparation, and has low cost.

[0014] In some possible implementations, based on the main swing arm comprising a first main swing member and a second main swing member fixedly connected, the cross-sectional shapes of the first main swing member and the second main swing member are both arc-shaped, thereby improving the bending reliability of the entire machine.

[0015] The axle up and down groove at two ends embeds respectively in two guide rails up and down of being made up of the groove on the attachment piece, and the tooth on the attachment piece is meshed with tooth on upper sprocket wheel, the lower sprocket.

[0016] The auxiliary swing arm provided in this application has a simple structure, reduces the difficulty of preparation, and has low cost.

[0017] In some possible implementations, the synchronization mechanism includes two synchronization parts, and the synchronization parts include a synchronization swing arm and a gear. The gears of the two synchronization parts are meshed with each other, and the synchronization swing arms of the two synchronization parts are arranged on both sides of the two meshed gears; the gears are rotatably connected to the shaft cover through the gear shaft, and a first boss is provided on both side walls of the synchronization swing arm away from the gear; a third connecting groove is provided on the connecting part, which is adapted to the synchronization swing arm, and the side wall of the third connecting groove is partially recessed to form a first groove adapted to the first boss, and the first boss slides and rotates in the first groove, so that the synchronization mechanism is slidably and rotatably connected to the connecting part.

[0018] The synchronization mechanism provided in the present application has a simple structure, reduces the difficulty of preparation, has a low cost, and ensures the reliability of synchronization when the entire machine is bent.

[0019] In some possible implementations, the foldable terminal also includes a flexible screen, which is located on one side of the first body, the hinge structure and the second body; the hinge structure also includes a supporting door panel, which is fixedly connected to the rotating mechanism and rotates with the rotation of the rotating mechanism, and the supporting door panel is used to support the flexible screen.

[0020] The connection method of the supporting door panel is simple, and the flexible screen is supported by the supporting door panel, thereby reducing the stress on the screen and preventing the bending area of ​​the flexible screen from collapsing or falling and being damaged.

[0021] In some possible implementations, based on the aforementioned pivot structure further including a door panel support, when the main swing arm includes a first main swing member and a second main swing member, each of the first and second main swing members is provided with a fixing post, and the main swing arm is connected to the door panel support via the fixing post. This means that the door panel support can be connected via the fixing post, resulting in a simple fixing method without requiring changes to other structures, facilitating the configuration of other structures.

[0022] In some possible implementations, based on the above-mentioned rotating shaft structure also including a supporting door panel, the material of the supporting door panel includes an ultra-high polymer material, and the supporting door panel is integrally formed.

[0023] This arrangement improves the processing reliability and economy of the supporting door panels, and the resulting supporting door panels are relatively flat, thereby improving the supporting door panels' bearing capacity for the flexible screen and improving problems such as screen creases.

[0024] In some possible implementations, the rotating shaft structure also includes a decorative door panel, which is fixedly connected to the rotating mechanism and rotates with the rotation of the rotating mechanism. The decorative door panel is used to shield the rotating mechanism, the synchronization mechanism and / or the damping mechanism to protect the rotating mechanism, the synchronization mechanism and / or the damping mechanism and prevent the rotating mechanism, the synchronization mechanism and / or the damping mechanism from interfering with other structures in the terminal.

[0025] In some possible implementations, based on the aforementioned rotating shaft structure further including a decorative door panel, when the secondary swing arm includes a swing arm rotating member and a sliding member, the decorative door panel is fixedly connected to the side of the sliding member facing away from the first protrusion, thereby fixedly connecting the decorative door panel to the secondary swing arm. Opposing ends of the decorative door panel are bent, forming a decorative slide groove between the bent portion and the unbent portion of the decorative door panel. Second protrusions are provided at opposing ends of the connecting member, and the second protrusions are positioned within the decorative slide groove. The decorative door panel is slidably connected to the connecting member via the decorative slide groove. Thus, the decorative door panel can be connected via the secondary swing arm, resulting in a simple fixing method without requiring changes to other structures, thus facilitating the configuration of other structures.

[0026] In some possible implementations, the above-mentioned rotating shaft structure also includes a decorative door panel, the material of the decorative door panel includes a super-strong polymer material, and the decorative door panel is integrally formed.

[0027] This arrangement improves the processing reliability and economy of the decorative door panel, and the resulting decorative door panel is relatively flat. When the shaft structure is arranged in a foldable terminal, it facilitates the arrangement of other structures in the terminal.

[0028] In some possible implementations, the number of pins, cams and first springs is two, and the number of damping swing arms is four; the two pins are arranged side by side along the first direction, and the pins extend along the second direction, the cam has two cam holes, the two cam holes are arranged side by side along the first direction, the cams are respectively sleeved on the two pins through the two cam holes, and there is a gap between the two cams, the two first springs are respectively sleeved on the two pins, and are respectively located in the gap between the two cams, wherein the rotating cams of the two damping swing arms are arranged adjacent to one of the cams, and along the second direction, are located on the cam away from the first. On one side of a spring, the rotating cams of the other two damping swing arms are arranged adjacent to another cam, and along the second direction, are located on the side of the cam away from the first spring; second protrusions are provided on the two side walls of the swing member away from the rotating cam, and a fifth connecting groove adapted to the damping swing arm is opened on the connecting member, and the side wall of the fifth connecting groove is partially recessed to form a second groove adapted to the second protrusion, and the second protrusion slides and rotates in the second groove to make the damping mechanism and the connecting member slidingly and rotatably connected; wherein the first direction is the direction from the first fuselage to the second fuselage, and the second direction is the axial direction of the rotating shaft structure.

[0029] The damping mechanism provided in the present application has a simple structure, reduces the difficulty of preparation, has a low cost, and provides a large damping force.

[0030] Exemplarily, the first direction is the X-axis direction in the embodiment, and the second direction is the Y-axis direction in the embodiment.

[0031] In some possible implementations, based on the aforementioned two pins, two cams, and two first springs, and four damping swing arms, a connecting portion is provided between the two damping swing arms on the same pin, with both ends of the connecting portion fixedly connected to the two damping swing arms, respectively. This ensures synchronization of the two damping swing arms on the same pin, thereby ensuring reliability during bending of the entire device.

[0032] In some possible implementations, the flexible swing arm includes a rotating shaft and a sliding portion located on one side of the rotating shaft, a limiting block is provided on the sliding portion, and a third boss is provided on both side walls of the sliding portion away from the rotating shaft; the flexible beam is located on both sides of the connecting rod, and a limiting hole is provided on the connecting rod; a rotating hole adapted to the rotating shaft is provided on the shaft cover, so that the flexible swing arm is rotatably connected to the shaft cover; a fourth connecting slot is provided on the connecting piece, and the side wall of the fourth connecting slot is partially recessed to form a third groove adapted to the third boss, and the third boss slides and rotates in the third groove, so that the flexible swing arm is slidably and rotatably connected to the connecting piece; the flexible beams located on both sides of the connecting rod are respectively fixed on the non-recessed side walls of the fourth connecting slot, and the limiting blocks of the flexible swing arm are clamped in the limiting holes of the connecting rod, so that the flexible swing arm and the connecting rod are fixedly connected.

[0033] The damping mechanism provided in the present application has a simple structure, reduces the difficulty of preparation, has a low cost, and provides a large damping force.

[0034] In some possible implementations, when the above-mentioned multiple damping mechanisms also include a lateral damping mechanism, a second convex strip is provided on both side walls of the lateral swing arm, a fifth connecting slot is provided on the connecting piece, and the side walls of the fifth connecting slot are partially recessed to form a fourth groove adapted to the second convex strip, and the second convex strip slides in the fourth groove to enable the lateral swing arm to be slidably connected to the connecting piece; a third shaft cover slot adapted to the lateral rotating part is provided on the shaft cover, and the lateral piece is rotatably connected to the shaft cover through the lateral rotating part; the number of lateral rotating parts is two, and the two lateral rotating parts are arranged at intervals; the lateral swing arm is an annular structure with an opening, and the two lateral rotating parts are fixedly connected to the lateral swing arm respectively, and are located on both sides of the opening; the support member is located in the annular structure, and the roller is located in the gap between the two lateral rotating parts.

[0035] The damping mechanism provided in the present application has a simple structure, reduces the difficulty of preparation, has a low cost, and provides a large damping force.

[0036] In some possible implementations, there are three damping mechanisms. When there are three damping mechanisms, the cost will not be increased due to an excessive number of damping mechanisms, nor will the damping force be reduced due to an insufficient number of damping mechanisms, thereby affecting the opening and closing feel.

[0037] In some possible implementations, all three damping mechanisms are convex-concave wheel damping mechanisms; or, all three damping mechanisms are compliant damping mechanisms; or, at least one of the three damping mechanisms is a convex-concave wheel damping mechanism, and at least one is a compliant damping mechanism. Of course, the combination of the three damping mechanisms is not limited to this.

[0038] In some possible implementations, there are three damping mechanisms; at least one of the three damping mechanisms is a convex-concave wheel damping mechanism, and at least one is a lateral damping mechanism; or at least one of the three damping mechanisms is a compliant damping mechanism, and at least one is a lateral damping mechanism. Of course, the combination of the three damping mechanisms is not limited to this.

[0039] In a second aspect, an embodiment of the present application provides a foldable terminal, which is an outward-folding foldable terminal. The outward-folding foldable terminal includes the hinge structure of the first aspect and has the same beneficial effects as the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] FIG1 is a schematic structural diagram of a foldable terminal provided in an embodiment of the present application;

[0041] FIG2 is a schematic diagram of a foldable mobile phone provided by an embodiment of the present application when folded;

[0042] FIG3 is a front structural schematic diagram of a rotating shaft structure provided in an embodiment of the present application;

[0043] FIG4 is a schematic diagram of the back structure of a rotating shaft structure provided in an embodiment of the present application;

[0044] FIG5 is an exploded view of the rotating shaft structure shown in FIG3 ;

[0045] FIG6 is an exploded view of the rotating shaft structure shown in FIG4 ;

[0046] FIG7 is a schematic structural diagram of a main swing arm provided in an embodiment of the present application;

[0047] FIG8 is a schematic diagram of a partial structure of a connector provided in an embodiment of the present application;

[0048] FIG9 is a positional relationship diagram of the main swing arm, the connecting member, and the shaft cover provided in an embodiment of the present application;

[0049] FIG10 is a schematic structural diagram of a secondary swing arm assembly provided in an embodiment of the present application;

[0050] FIG11 is a schematic diagram of a partial structure of a connector provided in an embodiment of the present application;

[0051] FIG12 is a schematic structural diagram of a synchronization mechanism provided in an embodiment of the present application;

[0052] FIG13 is a schematic diagram of a partial structure of a connector provided in an embodiment of the present application;

[0053] FIG14 is a top view of a damping mechanism provided in an embodiment of the present application;

[0054] FIG15 is a perspective view of a damping mechanism provided in an embodiment of the present application;

[0055] FIG16 is a schematic diagram of a partial structure of a connector provided in an embodiment of the present application;

[0056] FIG17 is an enlarged view of the QQ area in FIG3 ;

[0057] FIG18 is a cross-sectional view of FIG17 along the OO' direction;

[0058] FIG19 is a schematic diagram of a partial structure of a rotating shaft structure provided in an embodiment of the present application;

[0059] FIG20 is a diagram showing the position relationship of the supporting door panels when the foldable terminal is in a folded state according to an embodiment of the present application;

[0060] FIG21 is a schematic diagram of a partial structure of a rotating shaft structure provided in an embodiment of the present application;

[0061] FIG22 is a cross-sectional view of FIG21 along the PP' direction;

[0062] FIG23 is a schematic diagram of a partial structure of a connector provided in an embodiment of the present application;

[0063] FIG24 is a schematic diagram of a partial structure of a decorative door panel provided in an embodiment of the present application;

[0064] FIG25 is a front structural diagram of another rotating shaft structure provided in an embodiment of the present application;

[0065] FIG26 is a schematic diagram of the back structure of another rotating shaft structure provided in an embodiment of the present application;

[0066] FIG27 is an exploded view of the rotating shaft structure shown in FIG25;

[0067] FIG28 is an exploded view of the rotating shaft structure shown in FIG26;

[0068] FIG29 is an enlarged view of the WW region in FIG25 ;

[0069] FIG30 is an enlarged view of the RR region in FIG27 ;

[0070] FIG31 is a cross-sectional view of FIG29 along the SS' direction;

[0071] FIG32 is a front structural diagram of another rotating shaft structure provided in an embodiment of the present application;

[0072] FIG33 is a schematic diagram of the back structure of another rotating shaft structure provided in an embodiment of the present application;

[0073] FIG34 is an exploded view of the rotating shaft structure shown in FIG32;

[0074] FIG35 is an exploded view of the rotating shaft structure shown in FIG33 ;

[0075] FIG36 is a partial diagram of the positional relationship between the second damping mechanism and the shaft cover provided in an embodiment of the present application;

[0076] FIG37 is a cross-sectional view of FIG36 along the TT' direction;

[0077] FIG38 is a top view of a second damping mechanism provided in an embodiment of the present application;

[0078] Figure 39 is a three-dimensional view of the second damping mechanism provided in an embodiment of the present application.

[0079] Reference numerals: 10 - first display unit; 20 - first body; 30 - second body; 40 - hinge structure; 100 - foldable phone; 21 - first housing; 22 - first middle frame; 221 - first exterior component; 31 - second housing; 32 - second middle frame; 321 - second exterior component; 41 - shaft cover; 411 - first shaft cover slot; 42 - rotating mechanism; 421 - main swing arm; 4211 - first main swing member; 4212 - second main swing member; 4213 - fixing column; 422-auxiliary swing arm; 4221-swing arm rotating member; 4222-sliding member; 42221-first sliding surface; 42222-second sliding surface; 42223-side sliding surface; 4223-first protrusion; 42231-first convex portion; 42232-second convex portion; 4224-swing arm slide; 423-connecting member; 4230-connecting hole; 4231-first connecting member; 4232-second connecting member; 4233-first connecting slide; 4234-second connecting slide; 4235-first convex strip; 4236-structural member; 4237-third connecting slide; 4238-first groove; 4239-fifth connecting slide; 4240-second groove; 4241-second protrusion; 4242-fourth connecting slide; 4243-third groove; 43- Synchronizing mechanism; 431- Synchronizing member; 4311- Synchronizing swing arm; 43111- First boss; 4312- Gear; 43121- Gear portion; 43122- Gear rotating portion; 44- Damping mechanism; 44a- First damping mechanism; 44b- Second damping mechanism; 44b1- First compliant member; 44b2- Second compliant member; 44b3- First lateral member; 44b3- Second lateral member; 44c- Third damping mechanism; 441- Pin; 442- Cam; 4421- Cam hole; 443- Spring; 444- Damping swing arm; 4441- Annular rotating cam; 4442- Swinging member; 4443- Second boss; 445- Connecting portion; 446-flexible swing arm; 4461-rotating shaft; 4462-sliding part; 4463-limiting block; 4464-third convex column; 447-flexible unit; 4471-connecting rod; 44711-limiting hole; 4472-flexible beam; 448-lateral swing arm; 4481-second convex strip; 4482-opening; 4483-end; 4484-support member; 4485-roller; 449-lateral rotating part; 4486-second spring; 4487-bottom surface; 45-support door panel; 451-first supporting door panel; 452-second supporting door panel; 46-decorative door panel; 461-first decorative door panel; 462-second decorative door panel; 463-decorative slide. DETAILED DESCRIPTION

[0080] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0081] The term "and / or" in this article is merely a description of the association relationship between associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0082] In the description and claims of the embodiments of this application, the terms "first" and "second" are used to distinguish different objects, rather than to describe a specific order of objects. For example, the terms "first target object" and "second target object" are used to distinguish different objects, rather than to describe a specific order of objects.

[0083] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0084] In the description of the embodiments of this application, unless otherwise specified, "multiple" means two or more. For example, "multiple processing units" means two or more processing units; "multiple systems" means two or more systems.

[0085] The present invention provides a foldable terminal. The foldable terminal provided in the present invention can be a mobile phone, a tablet computer, a personal digital assistant (PDA), an in-car computer, a television, a smart wearable device, a smart home device, etc. The present invention does not specifically limit the specific form of the foldable terminal. For the sake of convenience, the following description uses the foldable terminal as an example.

[0086] 1 , which is a schematic diagram of the structure of a foldable terminal according to an embodiment of the present application. As shown in FIG1 , a foldable mobile phone 100 includes a first display unit (also referred to as a foldable screen or flexible screen) 10 .

[0087] The first display unit 10 is, for example, a flexible display screen. The first display unit 10 includes, for example, an organic light emitting diode (OLED) display screen. The OLED display screen does not require a backlight module, and the base substrate in the OLED display screen can, for example, be made of a flexible resin material, such as polyethylene terephthalate (PET), so that the OLED display screen has a bendable property. Of course, the type of the first display unit 10 includes but is not limited to an OLED display screen. As long as the display screen can be bent, it is within the scope of protection of this application. For example, it can also be a liquid crystal display (LCD) screen, an LED display screen (for example, including a Micro-LED display screen, a Mini-LED display screen), etc.

[0088] It should be noted that, to facilitate a clear description of the subsequent structural features and their positional relationships, the positional relationships of the various structures within the foldable phone 100 are defined using the X-axis, Y-axis, and Z-axis directions. The X-axis direction represents the width of the unfolded foldable phone 100, the Y-axis direction represents the length of the unfolded foldable phone 100, and the Z-axis direction represents the thickness of the unfolded foldable phone 100.

[0089] Continuing with Figure 1 , the foldable phone 100 also includes a structural assembly. This assembly includes a first body 20, a second body 30, and a hinge structure 40. Along the X-axis, the first body 20 and the second body 30 are located on either side of the hinge structure 40, and the hinge structure 40 is connected to the first body 20 and the second body 30, respectively. The first body 20, the hinge structure 40, and the second body 30 can be used to support the first display unit 10. The first body 20 and the second body 30 can each rotate about the axis S0 (parallel to the Y-axis) of the hinge structure 40 to achieve either a folded or unfolded state for the first display unit 10, thereby achieving either a folded or unfolded state for the foldable phone 100.

[0090] It should be noted that the foldable phone 100 can be folded at multiple positions, and accordingly, the structural assembly may include multiple hinge structures 40 and multiple bodies. For example, it may include two hinge structures 40 and three bodies, with two adjacent bodies connected by a hinge structure 40. In this way, the foldable phone 100 has two folding positions. It can be seen that the structural assembly includes at least one hinge structure 40 and at least two bodies, with two adjacent bodies connected by a hinge structure 40. For ease of explanation, the embodiments of this application are all described as an example in which the structural assembly includes one hinge structure 40 and two bodies (i.e., the first body 20 and the second body 30).

[0091] FIG1 is a schematic diagram of a foldable mobile phone after unfolding. FIG2 is a schematic diagram of a foldable mobile phone when folded. In FIG2 , when the foldable mobile phone 100 is folded, it can be folded away from the light emitting direction of the first display unit 10 (indicated by the arrow in FIG2 ), that is, the direction in which the first body section 20 and the second body section 30 rotate around the rotating shaft structure 40 is opposite to the light emitting direction of the flexible screen 10. In other words, when the foldable mobile phone 100 is in the folded state, the first display unit 10 is exposed to the outside. In this case, the foldable mobile phone 100 can also be called an outward-folding foldable mobile phone.

[0092] 1 , the first body 20 includes a first outer shell 21 and a first middle frame 22 . The second body 30 includes a second outer shell 31 and a second middle frame 32 .

[0093] The first housing 21 can be the back cover (also called the battery cover) of the foldable phone 100; it can also be a display unit for displaying information, which is not limited in this embodiment of the present application. The second housing 31 can be the back cover (also called the battery cover) of the foldable phone; it can also be a display unit for displaying information, which is also not limited in this embodiment of the present application. The embodiments of the present application are described using the first housing 21 as the back cover and the second housing 31 as the display unit (also called the second display unit or display screen, to distinguish it from the first display unit 10 described above) as an example.

[0094] The second display unit 31 may be a display screen of a type including an LCD display screen, an OLED display screen, and a LED display screen.

[0095] Continuing with FIG1 , the first middle frame 22 includes a first appearance member 221 and a first support member (not shown in FIG1 ) positioned between the first display unit 10 and the rear cover 21. The second middle frame 32 includes a second appearance member 321 and a second support member (not shown in FIG1 ) positioned between the first display unit 10 and the second housing 31.

[0096] The first display unit 10, back cover 21, first exterior component 221, second display unit 31, and second exterior component 321 form a housing. The housing contains structures such as a printed circuit board, a flexible circuit board, and functional components (not shown in Figures 1 and 2). These functional components include, for example, a display driver module, a camera, and a battery. The structures within the housing cavity are supported by the first support members of the first middle frame 22 and the second support members of the second middle frame 32.

[0097] The shaft structure 40 includes a shaft cover, a rotating structure, a synchronization mechanism, a damping mechanism, and a door panel, etc. However, the various structures in the existing shaft structure 40 have many parts, are complex to manufacture, and are costly. In addition, the existing damping mechanism has problems such as low damping force and poor opening and closing feel.

[0098] Based on this, the present invention provides a hinge structure that reduces the number of parts, simplifies assembly, reduces overall weight, and lowers costs. It also improves the damping force of the hinge structure, enhances the opening and closing feel, and can also improve issues such as screen creases.

[0099] The specific structure of the rotating shaft structure provided in the embodiment of the present application is introduced below.

[0100] In one example, referring to Figures 3, 4, 5, and 6, Figure 3 is a schematic diagram of the front structure of a rotating shaft structure provided in an embodiment of the present application, Figure 4 is a schematic diagram of the back structure of a rotating shaft structure provided in an embodiment of the present application, Figure 5 is an exploded view of the rotating shaft structure shown in Figure 3, and Figure 6 is an exploded view of the rotating shaft structure shown in Figure 4. As shown in Figures 3, 4, 5, and 6, the rotating shaft structure 40 includes a shaft cover 41, a rotation mechanism 42, a synchronization mechanism 43, a damping mechanism 44, two support door panels 45, and two decorative door panels 46. The two support door panels 45 are respectively a first support door panel 451 and a second support door panel 452, and the two decorative door panels 46 are respectively a first decorative door panel 461 and a second decorative door panel 462. Along the X-axis, the first support door panel 451 and the second support door panel 452 are arranged on either side of the shaft cover 41, and the first decorative door panel 461 and the second decorative door panel 462 are arranged on either side of the shaft cover 41.

[0101] It should be noted that in order to clearly display the shaft cover 41, rotating mechanism 42, synchronizing mechanism 43, damping mechanism 44 and other structures of the rotating shaft structure 40, Figure 3 does not show the decorative door panel 46 (which will block the shaft cover 41, rotating mechanism 42, synchronizing mechanism 43, damping mechanism 44).

[0102] The rotating mechanism 42 includes a main swing arm group and a secondary swing arm group, wherein the main swing arm group includes two main swing arms 421 disposed on both sides of the shaft cover 41 along the X-axis direction, and the secondary swing arm group includes two secondary swing arms 422 disposed on both sides of the shaft cover 41 along the X-axis direction. The number of main swing arm groups and secondary swing arm groups can be, for example, multiple, and the multiple main swing arm groups and the multiple secondary swing arm groups are evenly distributed on the shaft cover 41. For example, the number of main swing arm groups and the secondary swing arm groups is three, and they are evenly distributed on the shaft cover 41.

[0103] The hinge structure 40 further includes two connecting members 423 provided on both sides of the shaft cover 41 along the X-axis direction. The two connecting members 423 are respectively a first connecting member 4231 and a second connecting member 4232. The first connecting member 4231 and the second connecting member 4232 are each provided with at least one connecting hole 4230. The first connecting member 4231 is fixedly connected to the first fuselage 20 through the connecting hole 4230 thereon. For example, the first connecting member 4231 is fixedly connected to the first support member of the first middle frame 22 through the connecting hole 4230 thereon. To achieve a fixed connection with the first body 20; the second connecting member 4232 is fixedly connected to the second body 30 through the connecting hole 4230 thereon, for example, the second connecting member 4232 is fixedly connected to the first support member of the second middle frame 32 through the connecting hole 4230 thereon, to achieve a fixed connection with the second body 30, that is, the hinge structure 40 is connected to the first body 20 and the second body 30 through two connecting members 423, so as to realize the folding or unfolding of the first body 20 and the second body 30 through the hinge structure 40.

[0104] Referring to Figures 7, 8, and 9, Figure 7 is a schematic diagram of the structure of a main swing arm according to an embodiment of the present application. Figure 8 is a schematic diagram of a partial structure of a connecting member according to an embodiment of the present application. Figure 9 illustrates the positional relationship between the main swing arm, the connecting member, and the shaft cover. As shown in Figures 7, 8, and 9, the main swing arm 421 includes a first main swing member 4211 and a second main swing member 4212, which are fixedly connected. The cross-sectional shapes of the first and second main swing members 4211, 4212 are, for example, arc-shaped or approximately arc-shaped. That is, the projections of the first and second main swing members 4211, 4212 on the plane defined by the X-axis and the Z-axis are both arc-shaped or approximately arc-shaped. The connecting member 423 is provided with a first connecting slot 4233 that mates with the second main swing member 4212. At least a portion of the second main swing member 4212 is positioned in the first connecting slot 4233, allowing it to be rotatably connected to the connecting member 423 via the first connecting slot 4233. A first shaft cover slot 411 adapted to the first main pendulum member 4211 is provided on the shaft cover 41. At least a portion of the first main pendulum member 4211 is located in the first shaft cover slot 411 so as to be rotatably connected to the shaft cover 41 through the first shaft cover slot 411. Thus, when the position of the shaft cover 41 remains unchanged, the connecting member 423 can rotate relative to the shaft cover 41, thereby realizing the opening and closing of the first body 20 and the second body 30.

[0105] It should be noted that the projection on the plane formed by the X-axis and the Z-axis refers to the plane formed by the X-axis and the Y-axis when the foldable mobile phone 100 is in the unfolded state. The following examples are the same and will not be repeated here.

[0106] Referring to FIG10 , FIG10 is a schematic diagram of the structure of a secondary swing arm assembly provided in an embodiment of the present application. As shown in FIG10 , the secondary swing arm 422 includes a swing arm rotating member 4221 and a sliding member 4222 integrally formed with the swing arm rotating member 4221. The cross-sectional shape of the swing arm rotating member 4221 is, for example, arc-shaped or approximately arc-shaped, that is, the projection of the swing arm rotating member 4221 on the plane formed by the X-axis and the Z-axis is arc-shaped or approximately arc-shaped. The sliding member 4222 is, for example, in the shape of a flat plate. The sliding member 4222 includes a first sliding surface 42221 and a second sliding surface 42222 arranged opposite to each other along the Z-axis direction, and also includes a side sliding surface 42223 connecting the first sliding surface 42221 and the second sliding surface 42222. The swing arm rotating member 4221 is fixed to the side sliding surface 42223 to achieve a fixed connection with the sliding member 4222. A first protrusion 4223 is provided on the first surface 42221 of the sliding member 4222, and the first protrusion 4223 includes a first convex portion 42231 and a second convex portion 42232 arranged in sequence along the Z-axis direction. The size of the first convex portion 42231 in the Y-axis direction is smaller than the size of the second convex portion 42232 in the Y-axis direction, so that the second convex portion 42232 and the first surface 42221 form at least one swing arm slot 4224, wherein Figure 10 is explained by taking the second convex portion 42232 and the first surface 42221 forming two swing arm slots 4224, and the two swing arm slots 4224 are back to back along the Y-axis direction as an example.

[0107] It should be noted that the embodiment of the present application is described by taking the swing arm rotating part 4221 and the sliding part 4222 as an example of integral molding, but it does not constitute a limitation of the present application. For example, they can also be molded separately and fixed together by welding or bonding.

[0108] Referring to Figure 11 , which is a partial structural diagram of a connector according to an embodiment of the present application, as shown in Figure 11 , the connector 423 is provided with a second connecting slot 4234 that mates with the sliding member 4222 , and a first convex strip 4235 that mates with the swing arm slot 4224 is formed on the sidewall of the second connecting slot 4234 . The first convex strip 4235 slides within the swing arm slot 4224 to achieve a sliding connection between the auxiliary swing arm 422 and the connector 423 .

[0109] A second shaft cover slot (not shown in the figure) is provided on the shaft cover 41 to match the swing arm rotating member 4221. At least a portion of the swing arm rotating member 4221 is located in the second shaft cover slot so as to be rotatably connected to the shaft cover 41 through the second shaft cover slot. In this way, when the position of the shaft cover 41 remains unchanged, the connecting member 423 can rotate relative to the shaft cover 41, thereby realizing the opening and closing of the first fuselage 20 and the second fuselage 30.

[0110] From the above content, it can be seen that the main swing arm 421 is rotatably connected to the connecting member 423 and the shaft cover 41 respectively, the auxiliary swing arm 422 is slidably connected to the connecting member 423, and is rotatably connected to the shaft cover 41. The main swing arm 421, the auxiliary swing arm 422, the connecting member 423 and the shaft cover 41 constitute a connecting rod mechanism, which controls the movement of the connecting member 423 to realize the rotational movement of the hinge structure 40, thereby allowing the first body 20 and the second body 30 to be unfolded or folded, that is, the foldable mobile phone 100 can be unfolded or folded.

[0111] It should be noted that the embodiment of the present application does not limit the number and location of the synchronization mechanisms 43. Those skilled in the art can select the number and location of the synchronization mechanisms 43 according to actual conditions. The embodiment of the present application is described as follows: there are two synchronization mechanisms 43, and they are evenly distributed on the shaft cover 41.

[0112] Referring to Figure 12, Figure 12 is a schematic diagram of the structure of a synchronization mechanism provided in an embodiment of the present application. As shown in Figure 12, the synchronization mechanism 43 includes two synchronization members 431 arranged side by side along the X-axis. The synchronization members 431 include a synchronization swing arm 4311 and a gear 4312. The gears 4312 of the two synchronization members 431 are meshed with each other. The synchronization swing arms 4311 of the two synchronization members 431 are located on either side of the meshing gears 4312 along the X-axis.

[0113] Continuing with FIG12 , the gear 4312 includes a gear portion 43121 and two gear rotating portions (also referred to as gear shafts) 43122 located on either side of the gear portion 43121 along the Y-axis. The two gears 4312 are meshed with each other through the gear portion 43121. The shaft cover 41 is provided with a rotation hole (not shown) adapted for the gear rotating portion 43122. The gear rotating portions 43122 of the two gears 4312 are inserted into the rotation hole in a one-to-one correspondence, thereby achieving a rotational connection between the synchronization mechanism 43 and the shaft cover 41. Two first protrusions 43111 are provided on the side walls of the synchronization swing arm 4311, which is located opposite to each other along the Y-axis. The two first protrusions 43111 extend in opposite directions.

[0114] Referring to Figure 13, Figure 13 is a schematic diagram of a partial structure of a connector provided in an embodiment of the present application. As shown in Figure 13, the connector 423 is provided with a third connecting groove 4237 adapted to mate with the synchronizing swing arm 4311. The sidewalls of the third connecting groove 4237 are partially recessed to form first grooves 4238 adapted to mate with the two first bosses 43111. The first bosses 43111 slide and rotate within the first grooves 4238, thereby achieving a sliding and rotating connection between the synchronizing mechanism 43 and the connector 423. The grooves 4238 have a slope to facilitate the sliding of the synchronizing member 431.

[0115] From the above content, it can be seen that the synchronization mechanism 43 cooperates with the sliding rotation of the connecting member 423 through the boss 43111, and realizes the synchronous rotation of the first connecting member 4231 and the second connecting member 4232 through the engagement of the gear 4312, thereby ensuring the synchronization of the first connecting member 4231 and the second connecting member 4232, and further ensuring the synchronization of the first fuselage 20 and the second fuselage 30.

[0116] The damping mechanism 44 provides a damping force, which allows the foldable phone 100 to achieve a comfortable opening and closing feel during opening and closing. The present embodiment does not limit the number of damping mechanisms 44; those skilled in the art may configure them based on practical needs. Figures 1-4 illustrate an example in which three damping mechanisms 44 are evenly distributed on the shaft cover 41. When there are three damping mechanisms 44, there is no increased cost due to an excessive number of damping mechanisms 44, nor is there a reduced damping force due to a insufficient number of damping mechanisms 44, which could affect the opening and closing feel.

[0117] Referring to Figures 14 and 15 , Figure 14 is a top view of a damping mechanism provided in an embodiment of the present application, and Figure 15 is a perspective view of a damping mechanism provided in an embodiment of the present application. As shown in Figures 14 and 15 , the damping mechanism 44 includes two pins 441, two concave wheels 442, two first springs 443, and four damping swing arms 444. To distinguish between the damping mechanisms described in the following examples, the damping mechanism 44 in this example may also be referred to as a concave-concave wheel damping mechanism. The two pins 441 are arranged side by side along the X-axis, and each pin 441 extends along the Y-axis. Each concave wheel 442 has two concave holes 4421 arranged side by side along the X-axis. The concave wheels 442 are mounted on the pins 441 through the two concave holes 4421, with a gap between the two concave wheels 442. The two first springs 443 are mounted on the two pins 441, respectively, and are located in the gap between the two concave wheels 442.

[0118] The damping swing arm 444 includes an annular rotating cam 4441 and a swinging member 4442 located on one side of the annular rotating cam 4441 and fixedly connected to the rotating cam 4441. Two second protrusions 4443 extending along the Y-axis are provided on the side walls of the swinging member 4442 at one end away from the rotating cam 4441. The two second protrusions 4443 extend in opposite directions. Along the Y-axis, two damping swing arms 444 are each sleeved on one of the pins 441 via their respective annular rotating cams 4441. Each of the two annular rotating cams 4441 is positioned adjacent to a concave gear 442 and located on the side of the concave gear 442 facing away from the first spring 443. The other two damping swing arms 444 are each sleeved on the other pin 441 via their respective annular rotating cams 4441. Each of the two annular rotating cams 4441 is positioned adjacent to a concave gear 442 and located on the side of the concave gear 442 facing away from the first spring 443.

[0119] Referring to FIG16 , FIG16 is a schematic diagram of the partial structure of a connector provided in an embodiment of the present application. As shown in FIG16 , a fifth connecting slot 4239 adapted to the damping swing arm 444 is provided on the connector 423, and the sidewall of the fifth connecting slot 4239 is partially recessed to form a second groove 4240 adapted to the two second protrusions 4443. In conjunction with FIG17 and FIG18 , FIG17 is an enlarged view of the QQ area in FIG3 , and FIG18 is a cross-sectional view of FIG17 along the OO' direction. As shown in FIG15-18 , when the cam 442, the first spring 443, and the damping swing arm 444 are sleeved on the pin 441, the two ends of the pin 441 are exposed, and the exposed portion of the pin 441 is fixedly connected to the shaft cover 41, that is, the damping mechanism 44 is fixedly connected to the shaft cover 41 via the pin 441. The second protrusion 4443 slides and rotates in the second groove 4240 to achieve a sliding and rotating connection between the damping mechanism 44 and the connecting member 423 .

[0120] In order to ensure the synchronization of the two damping swing arms 444 located on the same pin shaft 441 , a connecting portion 445 is provided between the two damping swing arms 444 for connecting the two damping swing arms 444 .

[0121] Specifically, when the damping swing arm 444 is connected to the connecting member 423 by sliding rotation, the rotation of the connecting member 423 is converted into linear motion of the first spring 443 (moving along the Y-axis direction on the pin shaft 441) through the cam surface (the contact surface between the concave wheel 442 and the annular rotating cam 4441), thereby compressing the first spring 443 and generating a damping force.

[0122] As can be seen from the above, the rotating shaft structure 40 employs three damping mechanisms 44, evenly distributed on the shaft cover 41. The damping mechanisms 44 formed by the three convex and concave gears enhance the damping force of the rotating shaft structure 40, improving the opening and closing feel during deployment and folding. Furthermore, the pressure on the cam surfaces of each damping mechanism 44 is evenly distributed, avoiding problems such as excessive pressure on the cam surfaces, wear on the cam surfaces, and a shortened lifespan. Furthermore, in this example, the damping mechanisms 44 are simple in structure, easy to manufacture, and low in cost.

[0123] Refer to Figure 19, which is a schematic diagram of the partial structure of the rotating shaft structure provided in an embodiment of the present application. In order to clearly show the position of the supporting door panel 45, the decorative door panel is not shown in Figure 19. As shown in Figures 7, 9, and 19, the first and second main rocking members 4211, 4212 of the main rocking arm 421 are each provided with a fixing post 4213. The fixing post 4213 extends in a direction opposite to the direction in which the first and second main rocking members 4211, 4212 bend. The first and second main rocking members 4211, 4212 of one of the main rocking arms 421 in the main rocking arm assembly are fixedly connected to one of the support panels 45, such as the first support panel 451, via the fixing post 4213. The first and second main rocking members 4211, 4212 of the other main rocking arm 421 in the main rocking arm assembly are fixedly connected to another support panel 45, such as the second support panel 452, via the fixing post 4213. Thus, the two support panels 45 are disposed on either side of the shaft cover 41 along the X-axis. In other words, the support panels 45 are fixedly connected to the main rocking arm 421, and the movement of the main rocking arm 421 controls the movement of the support panels 45. The first display unit 10 is supported by the first supporting door panel 451 and the second supporting door panel 452. In the unfolded state, the first display unit 10 is supported to prevent the first display unit 10 from being pressed and collapsed. In the folded state (as shown in FIG. 20 ), the bending area of ​​the first display unit 10 is supported to prevent the first display unit 10 from collapsing.

[0124] The material of the support door panel 45 is not limited in the embodiments of the present application, and those skilled in the art may select the material according to actual circumstances. For example, the material of the support door panel 45 includes a super-polymer material. When the material of the support door panel 45 is a super-polymer material, the support door panel 45 can be integrally formed. This can improve the load-bearing capacity of the support door panel 45 for the first display unit 10, improve the reliability of the support for the first display unit 10, and further improve the reliability and cost-effectiveness of the processing of the support door panel 45.

[0125] Referring to Figures 21 and 22, Figure 21 is a schematic diagram of a partial structure of the rotating shaft structure provided in an embodiment of the present application, and Figure 22 is a cross-sectional view of Figure 21 along the PP' direction. As shown in Figures 21 and 22, the first decorative door panel 461 is fixedly connected to the sliding member 4222 of one of the auxiliary swing arms 422 in the auxiliary swing arm group, and the second decorative door panel 462 is fixedly connected to the sliding member 4222 of the other auxiliary swing arm 422 in the auxiliary swing arm group. The movement of the auxiliary swing arm 422 controls the movement of the decorative door panel 46.

[0126] Referring to Figures 23 and 24, Figure 23 is a schematic diagram of a partial structure of a connector provided in an embodiment of the present application, and Figure 24 is a schematic diagram of a partial structure of a decorative door panel provided in an embodiment of the present application. In conjunction with Figures 23 and 24, along the Y-axis, the decorative door panel 46 is bent at opposite ends, forming a decorative chute 463 between the bent and unbent portions. Correspondingly, along the Y-axis, the connector 423 is provided with second protrusions 4241 at opposite ends thereof, which are positioned within the decorative chute 463. When the movement of the secondary swing arm 422 controls the movement of the decorative door panel 46, the second protrusions 4241 slide within the decorative chute 463. The first and second decorative door panels 461, 462 can shield at least portions of the rotation mechanism 42, the synchronization mechanism 43, and the damping mechanism 44, thereby protecting these components.

[0127] Through the detailed description of each of the above structures, it can be seen that the hinge structure 40 provided in the embodiment of the present application can increase the damping force of the damping mechanism. The damping mechanism can provide not only a flattening force but also a closing force, adjusting the opening and closing feel of the hinge structure 40, which is beneficial to the user experience. When applied to an outward-folding folding terminal, the life of the hinge structure 40 can be improved, avoiding the problem of high cam surface pressure and severe wear when a single damping mechanism 44 is used. The damping mechanism 44 has a simple structure and low cost. In addition, because the support door panel 45 is relatively flat and integrally formed, the processing reliability and processing economy are improved, and the bearing capacity of the support door panel 45 on the first display unit 10 is improved, which improves the problem of screen creases. In addition, the main swing arm 421, the auxiliary swing arm 422 and the synchronization mechanism 43 are simple in structure and cooperate with each other to ensure the bending reliability of the entire device, reduce the weight of the entire device, and reduce costs.

[0128] In another example, referring to Figures 25, 26, 27, and 28, Figure 25 is a schematic diagram of the front structure of another rotating shaft structure provided in an embodiment of the present application, Figure 26 is a schematic diagram of the back structure of another rotating shaft structure provided in an embodiment of the present application, Figure 27 is an exploded view of the rotating shaft structure shown in Figure 25, and Figure 28 is an exploded view of the rotating shaft structure shown in Figure 26. It should be noted that Figures 25, 26, 27, and 28 do not show a decorative door panel 46. It is understood that in actual settings, the rotating shaft structure of the embodiment of the present application may include a decorative door panel 46. As shown in Figures 25, 26, 27, and 28, unlike the above example, one of the three damping mechanisms 44 is different from the other two damping mechanisms 44. Specifically, the three damping mechanisms 44 include a first damping mechanism 44a, a second damping mechanism 44b, and a third damping mechanism 44c. Along the Y-axis, a first damping mechanism 44a, a second damping mechanism 44b, and a third damping mechanism 44c are sequentially arranged, with the second damping mechanism 44b located between the first damping mechanism 44a and the third damping mechanism 44c. The first damping mechanism 44a and the third damping mechanism 44c may be, for example, the convex-concave wheel damping mechanism described in the above example. The specific structure of these damping mechanisms can be referenced to the above example and will not be further described here. The specific structure of the second damping mechanism 44b will be described below.

[0129] Referring to Figures 29 and 30 , Figure 29 is an enlarged view of the WW region in Figure 25 , and Figure 30 is an enlarged view of the RR region in Figure 27 . As shown in Figures 29 and 30 , the second damping mechanism 44b includes two compliant members of identical structure, namely a first compliant member 44b1 and a second compliant member 44b2 . For purposes of distinction, the second damping mechanism 44b in this example is also referred to as a compliant damping mechanism.

[0130] The compliant member includes a compliant swing arm 446 and a flexible unit 447. The compliant swing arm 446 includes a rotation axis 4461 and a sliding portion 4462 located on one side of the rotation axis 4461. A limit block 4463 is provided on the upper surface of the sliding portion 4462. Two third protrusions 4464 extending along the Y-axis are provided on both side walls of the sliding portion 4462 away from the rotation axis 4461. The two third protrusions 4464 extend in opposite directions (i.e., one extends in the +Y direction and the other extends in the -Y direction). The flexible unit 447 includes a connecting rod 4471 and flexible beams 4472 located on both sides of the connecting rod 4471. The connecting rod 4471 has a limit hole 44711.

[0131] The shaft cover 41 is provided with a rotation hole (not shown in the figure) adapted to the rotation shaft 4461 , and the rotation shaft 4461 of the flexible swing arm 446 is inserted into the rotation hole of the shaft cover 41 to realize the rotation connection between the second damping mechanism 44b and the shaft cover 41 .

[0132] Referring to Figure 31 , which is a cross-sectional view taken along the SS′ direction of Figure 29 , the connector 423 is provided with a fourth connecting slot 4242. The sidewalls of the fourth connecting slot 4242 are partially recessed to form third grooves 4243 that mate with the two third protrusions 4464. The third protrusions 4464 are positioned within the third grooves 4243. Flexible beams 4472 located on either side of the connecting rod 4471 are fixed to the sidewalls of the fourth connecting slot 4242, i.e., the unrecessed areas of the sidewalls, to secure the flexible unit 447 to the connector 423. Furthermore, the stopper 4463 of the compliant swing arm 446 engages with the stopper hole 44711 of the flexible unit 447, securing the compliant swing arm 446 and the flexible unit 447. When the connecting member 423 is unfolded or folded along with the first body 20 and the second body 30 , the third protrusion 4464 slides and rotates in the third groove 4243 to achieve the sliding and rotating connection between the damping mechanism 44 and the connecting member 423 .

[0133] Specifically, during the unfolding or folding of the hinge structure 40, the connector 423 drives the sliding portion 4462 of the compliant swing arm 446 to slide, causing the sliding portion 4462 to drive the connecting rod 4471 to move up and down (perpendicular to the Y-axis), thereby compressing the flexible beam 4472 and generating a damping force. At different unfolding or folding angles, the second damping mechanism 44b reaches a stable state, helping to maintain the hinge structure 40 in the hovering, unfolded, and closed states.

[0134] For example, during the transition from the folded state to the unfolded state of the first and second bodies 20 and 30, when the angle between the plane of the first and second bodies 20 and 30 is within a predetermined angle, the flexible beam 4472 buckles, enters the closing force range, generates a closing force, and the second damping mechanism 44b reaches a first steady state. At this point, if the user lets go, the first and second bodies 20 and 30 return to their initial positions, i.e., to the folded state. However, when the angle between the plane of the first and second bodies 20 and 30 is within a predetermined angle, the flexible beam 4472 is between the closing force range and the unfolding force range, and the second damping mechanism 44b reaches a balanced steady state. At this point, if the user lets go, the first and second bodies 20 and 30 maintain their positions, i.e., the angle between the plane of the first and second bodies 20 and 30 remains at the predetermined angle. When the angle between the plane where the first fuselage 20 is located and the plane where the second fuselage 30 is located is greater than the preset angle, the flexible beam 4472 continues to bend and enters the deployment force range, generating a deployment force. The second damping mechanism 44b reaches a second steady state, realizing relative sliding between the connecting member 423 and the second damping mechanism 44b, which is beneficial to the deployment of the first fuselage 20 and the second fuselage 30.

[0135] It should be noted that this example illustrates a shaft structure 40 including three damping mechanisms 44, wherein the three damping mechanisms 44 include two convex-concave wheel damping mechanisms and one compliant damping mechanism, with the compliant damping mechanism located between the two convex-concave wheel damping mechanisms. This does not constitute a limitation of the present application, and those skilled in the art may configure the configuration based on actual circumstances. In other optional embodiments of the present application, the shaft structure 40 may also include three compliant damping mechanisms, or two compliant damping mechanisms and one convex-concave wheel damping mechanism, etc. The specific configuration positions and connection relationships are the same as those in the above examples and will not be further described here. For details, please refer to the corresponding content of the above two examples.

[0136] Through the detailed description of each of the above structures, it can be seen that the hinge structure 40 provided in the embodiment of the present application can increase the damping force of the damping mechanism, and the provision of a second damping mechanism helps maintain the hinge structure 40 in its hovering, unfolded, and closed states, adjusts the opening and closing feel of the hinge structure 40, and improves the user experience. In addition, when the hinge structure 40 is applied to an outward-folding foldable terminal, it can extend the life of the hinge structure 40, avoiding the problems of high cam surface pressure and severe wear that occur when a single damping mechanism 44 is used. The damping mechanism 44 also has a simple structure and low cost. In addition, because the support door panel 45 is relatively flat and integrally formed, processing reliability and processing economy are improved, and the support door panel 45's load-bearing capacity for the first display unit 10 is enhanced, thereby improving problems such as screen creases. In addition, the main swing arm 421, the auxiliary swing arm 422, and the synchronization mechanism 43 are simple in structure and cooperate with each other to ensure the bending reliability of the entire device, reduce the weight of the entire device, and lower costs.

[0137] In another example, referring to Figures 32, 33, 34, and 35, Figure 32 is a schematic diagram of the front structure of another rotating shaft structure provided in an embodiment of the present application, Figure 33 is a schematic diagram of the back structure of another rotating shaft structure provided in an embodiment of the present application, Figure 34 is an exploded view of the rotating shaft structure shown in Figure 32, and Figure 35 is an exploded view of the rotating shaft structure shown in Figure 33. It should be noted that Figures 32, 33, 34, and 35 do not show a decorative door panel 46. It is understood that in actual settings, the rotating shaft structure 40 of the embodiment of the present application may include a decorative door panel 46. As shown in Figures 32, 33, 34, and 35, unlike the first example, one of the three damping mechanisms 44 is different from the other two damping mechanisms 44. Specifically, the three damping mechanisms 44 include a first damping mechanism 44a, a second damping mechanism 44b, and a third damping mechanism 44c. Along the Y-axis, a first damping mechanism 44a, a second damping mechanism 44b, and a third damping mechanism 44c are sequentially arranged, with the second damping mechanism 44b located between the first damping mechanism 44a and the third damping mechanism 44c. The first damping mechanism 44a and the third damping mechanism 44c may be, for example, the convex-concave wheel damping mechanism described in the above example. The specific structure of these damping mechanisms can be referenced to the above example and will not be further described here. The specific structure of the second damping mechanism 44b will be described below.

[0138] Referring to Figures 36 and 37 , Figure 36 is a partial view of the positional relationship between the second damping mechanism and the shaft cover according to an embodiment of the present application, and Figure 37 is a cross-sectional view of Figure 36 along the TT' direction. As shown in Figures 36 and 37 , the second damping mechanism 44b includes two identical lateral members, namely a first lateral member 44b3 and a second lateral member 44b3. For purposes of distinction, the second damping mechanism 44b in this example is also referred to as a lateral damping mechanism.

[0139] Referring to Figures 38 and 39 , Figure 38 is a top view of the second damping mechanism provided in an embodiment of the present application, and Figure 39 is a perspective view of the second damping mechanism provided in an embodiment of the present application. As shown in Figures 38 and 39 , the lateral member includes a lateral swing arm 448 and a lateral rotation portion 449. The cross-sectional shape of the lateral rotation portion 449 is, for example, arc-shaped or approximately arc-shaped, i.e., the projection of the lateral rotation portion 449 on the plane formed by the X-axis and the Y-axis is arc-shaped or approximately arc-shaped.

[0140] Along the Y-axis, second convex strips 4481 are provided on both side walls of the lateral swing arm 448. A fifth connecting slot (not shown) is provided on the connector 423. The sidewalls of the fifth connecting slot are partially recessed to form a fourth groove (not shown) that mates with the two second convex strips 4481. The second convex strips 4481 are located within the fourth grooves. When the connector 423 is unfolded or folded with the first and second bodies 20, 30, the second convex strips 4481 slide within the fourth grooves, achieving a sliding connection between the second damping mechanism 44 and the connector 423.

[0141] A third shaft cover slot (not shown in the figure) is provided on the shaft cover 41 and is adapted to the lateral rotating portion 449. The lateral rotating portion 449 is located in the third shaft cover slot to realize a rotational connection between the second damping mechanism 44b and the shaft cover 41, so that the lateral swing arm 448 can rotate relative to the shaft cover 41 when the position of the shaft cover 41 remains unchanged.

[0142] Exemplarily, the lateral member includes two lateral rotating parts 449 arranged at intervals, and the lateral swing arm 448 is a non-closed annular structure, that is, the lateral swing arm 448 has an opening 4482, and the opening 4482 is arranged so that the lateral swing arm 448 has two end parts 4483 arranged at intervals, and the two lateral rotating parts 449 are respectively connected to the two end parts 4483 of the lateral swing arm 448, and a partial area of ​​the shaft cover 41 is located in the gap between the two lateral rotating parts 449.

[0143] A support member 4484 and a roller 4485 rotatably connected to the support member 4484 are disposed within the annular lateral swing arm 448. At least one second spring 4486 is sleeved on the support member 4484, with opposite ends of the second spring 4486 fixedly connected to the support member 4484 and the roller 4485, respectively. The sidewall of the shaft cover 41 located in the gap between the two lateral rotating portions 449 contacts the roller 4485.

[0144] Optionally, in order to better support and protect the second spring 4486, a bottom surface 4487 is provided on the lateral swing arm 448 opposite to the second spring 4486, that is, in the expanded state, the projection of the second spring 4486 on the plane formed by the X-axis and the Y-axis is located at the projection of the bottom surface 4487 on the plane formed by the X-axis and the Y-axis.

[0145] Specifically, when the connecting member 423 is unfolded or folded along with the first body 20 and the second body 30, the connecting member 423 drives the lateral swing arm 448 to rotate relative to the shaft cover 41, and the roller 4485 moves around the side wall of the shaft cover 41. The shaft cover 41 squeezes the roller 4485, and then the roller 4485 compresses the second spring 4486. Accordingly, the roller 4485 is subjected to a load F, generating a damping force.

[0146] That is to say, among the three damping mechanisms provided in the embodiment of the present application, the convex and concave wheel damping mechanism is used to provide the opening and closing feel, and the force between the roller and the shaft cover in the lateral damping mechanism is used to avoid the problem that the lateral damping mechanism only has a flattening force but cannot generate a closing force, thereby improving the unfolding retention force of the hinge structure, so that the foldable terminal has a better feel during the unfolding or folding process, which is beneficial to the user experience.

[0147] It should be noted that this example is based on an example in which the shaft structure 40 includes three damping mechanisms 44, and the three damping mechanisms 44 include two convex-concave wheel damping mechanisms and one lateral damping mechanism, and the lateral damping mechanism is located between the two convex-concave wheel damping mechanisms. However, this does not constitute a limitation of the present application, and those skilled in the art may configure the configuration according to actual circumstances. In other optional embodiments of the present application, the shaft structure 40 may also include two lateral damping mechanisms and one convex-concave wheel damping mechanism, or one compliant damping mechanism and two lateral damping mechanisms, or two compliant damping mechanisms and one lateral damping mechanism, or one compliant damping mechanism, one convex-concave wheel damping mechanism, and one lateral damping mechanism, etc. The specific configuration positions and connection relationships are the same as those in the above examples and will not be repeated here. For details, please refer to the corresponding contents of the above two examples.

[0148] It should be noted that in the above examples, in order to facilitate the preparation of the connecting member 423, the connecting member 423 can be formed as one piece (such as the connecting member 423 in the first and second examples), and the connecting member 423 can also be composed of multiple structural members (such as the multiple structural members 4236 in the third example).

[0149] As can be seen from the detailed description of each of the above structures, the hinge structure 40 provided in the present embodiment can increase the damping force of the damping mechanism. This damping mechanism can generate both a flattening force and a closing force. The convex-concave wheel damping mechanism provides a smooth opening and closing feel for the hinge structure 40. When the hinge structure 40 is in the unfolded state, the lateral damping mechanism enhances the unfolded retention force of the hinge structure 40 through the interaction between the roller 4485 and the shaft cover 41, thus improving the user experience. When this hinge structure 40 is used in an outward-folding foldable terminal, it can extend the life of the hinge structure 40, avoiding the high cam surface pressure and severe wear that can occur with a single damping mechanism 44. It can also avoid the inability to generate a closing force when only a lateral damping mechanism is used. Furthermore, because the support door panel 45 is relatively flat and integrally formed, processing reliability and economic efficiency are improved, as well as the support door panel 45's ability to support the first display unit 10, thereby improving issues such as screen creases. In addition, the main swing arm 421, the auxiliary swing arm 422 and the synchronization mechanism 43 have simple structures and cooperate with each other to ensure the bending reliability of the entire machine, reduce the weight of the entire machine, and lower the cost.

[0150] In summary, the hinge structure 40 provided in the embodiment of the present application increases the damping force of the damping mechanism and adjusts the opening and closing feel of the hinge structure 40 through three sets of convex-concave wheel damping mechanisms 44, or three sets of compliant damping mechanisms 44, or a combination of a convex-concave wheel damping mechanism 44 and a compliant damping mechanism 44, or a combination of a lateral damping mechanism 44 and a convex-concave wheel damping mechanism 44, or a combination of a lateral damping mechanism 44 and a compliant damping mechanism 44, thereby improving the user experience. Furthermore, because the support door panel 45 is relatively flat and integrally formed, processing reliability and economic efficiency are improved, and the support door panel 45's bearing capacity for the first display unit 10 is enhanced, thereby improving problems such as screen creases. Furthermore, the main swing arm 421, the auxiliary swing arm 422, and the synchronization mechanism 43 have simple structures and cooperate with each other to ensure the bending reliability of the entire device, reduce the weight of the entire device, and lower costs.

[0151] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A rotating shaft structure, characterized in that: Applicable to an outward-folding foldable terminal, the outward-folding foldable terminal comprises a first body and a second body, and the hinge structure connecting the first body and the second body, the hinge structure comprising: Shaft cap; Two connecting members, located on both sides of the shaft cover, used to connect with the first fuselage and the second fuselage respectively; A rotating mechanism, rotatably connected to the shaft cover and slidably and rotatably connected to the connecting member, for controlling the movement of the connecting member; A synchronization mechanism, connected in rotation with the shaft cover and connected in sliding and rotation with the connecting member, for synchronizing the rotation of the two connecting members; A plurality of damping mechanisms, wherein the plurality of damping mechanisms include a convex-concave wheel damping mechanism and / or a compliant damping mechanism; The convex-concave wheel damping mechanism comprises a pin shaft, a concave wheel, a first spring and at least two damping swing arms, wherein the pin shaft is fixedly connected to the shaft cover, and the concave wheel and the first spring are both sleeved on the pin shaft; the damping swing arm comprises a rotating cam sleeved on the pin shaft and adjacent to and in contact with the concave wheel, and a swinging member located on one side of the rotating cam, wherein the swinging members of the two damping swing arms are respectively connected to the two connecting members in a sliding and rotating manner; when the swinging member and the connecting member slide and rotate, the first spring is compressed and generates an axial extrusion force, which acts between the concave wheel and the rotating cam to generate a damping force; The compliant damping mechanism includes two compliant parts, which include a compliant swing arm and a flexible unit. The flexible units of the two compliant parts are respectively fixed on the two connecting parts. One end of the compliant swing arm is rotatably connected to the shaft cover, and the other ends of the compliant swing arms of the two compliant parts are respectively slidably and rotatably connected to the connecting parts. The flexible unit includes a connecting rod and a flexible beam. The compliant swing arm is fixedly connected to the connecting rod. When the other end of the compliant swing arm slides and rotates with the connecting part, the connecting rod is driven to move, and the flexible beam is compressed to generate a damping force.

2. The rotating shaft structure according to claim 1, characterized in that: The plurality of damping mechanisms further include a lateral damping mechanism; the lateral damping mechanism includes two lateral members, the lateral members include a lateral swing arm and a lateral rotating portion, the lateral rotating portion is rotatably connected to the shaft cover, and the lateral swing arms of the two lateral members are respectively slidably connected to the two connecting members; A support member and a roller rotatably connected to the support member are provided in the lateral swing arm, and at least one second spring is sleeved on the support member, and opposite ends of the second spring are fixedly connected to the support member and the roller respectively; when the angle of the plane where the two connecting members are located is within a preset angle range, the roller contacts the side wall of the shaft cover, the shaft cover squeezes the roller, and the second spring is compressed to generate a damping force.

3. The rotating shaft structure according to claim 1, characterized in that: The rotating mechanism comprises a main swing arm assembly; the main swing arm assembly comprises two main swing arms respectively arranged on both sides of the shaft cover; The main swing arm includes a first main swing member and a second main swing member that are fixedly connected, a first connecting slot adapted to the second main swing member is provided on the connecting member, the main swing arm is rotatably connected to the connecting member through the second main swing member, a first shaft cover slot adapted to the first main swing member is provided on the shaft cover, and the main swing arm is rotatably connected to the connecting member through the second main swing member. A main pendulum component is rotatably connected to the shaft cover, and the position of the shaft cover remains unchanged. The first main pendulum components of the two main pendulum arms in the main pendulum arm group rotate relative to the shaft cover to drive the two connecting components to rotate through the second main pendulum components of the two main pendulum arms in the main pendulum arm group.

4. The rotating shaft structure according to claim 3, characterized in that: The cross-sectional shapes of the first main pendulum component and the second main pendulum component are both arc-shaped.

5. The rotating shaft structure according to claim 3, characterized in that: The rotating mechanism further comprises an auxiliary swing arm assembly; the auxiliary swing arm assembly comprises two auxiliary swing arms respectively arranged on both sides of the shaft cover, the auxiliary swing arm comprises a swing arm rotating member and a sliding member; the swing arm rotating member is fixed on the side wall of the sliding member, a first protrusion is arranged on the sliding member, and at least one swing arm sliding groove is formed between the first protrusion and the sliding member; The connecting member is provided with a second connecting groove adapted to the sliding member, and a first convex strip adapted to the swing arm groove is formed on the side wall of the second connecting groove, the auxiliary swing arm is slidingly connected to the connecting member via the swing arm groove, the shaft cover is provided with a second shaft cover groove adapted to the swing arm rotating member, the auxiliary swing arm is rotationally connected to the shaft cover via the swing arm rotating member, the position of the shaft cover remains unchanged, the swing arm rotating members of the two auxiliary swing arms in the auxiliary swing arm group rotate relative to the shaft cover, so as to drive the two connecting members to rotate through the sliding members of the two auxiliary swing arms in the auxiliary swing arm group.

6. The rotating shaft structure according to claim 1, characterized in that: The synchronization mechanism comprises two synchronization members, the synchronization members comprise synchronization swing arms and gears, the gears of the two synchronization members are meshed with each other, and the synchronization swing arms of the two synchronization members are arranged on both sides of the two meshed gears; The gear is rotatably connected to the shaft cover via a gear shaft, and first convex columns are provided on both side walls of the synchronous swing arm away from the end of the gear; The connecting member is provided with a third connecting slot adapted to the synchronous swing arm, and the side wall of the third connecting slot is partially recessed to form a first groove adapted to the first boss, and the first boss slides and rotates in the first groove to enable the synchronous mechanism to be slidably and rotatably connected to the connecting member.

7. The rotating shaft structure according to any one of claims 1 to 6, characterized in that: The foldable terminal further includes a flexible screen located on one side of the first body, the hinge structure and the second body; The rotating shaft structure also includes a supporting door plate, which is fixedly connected to the rotating mechanism and rotates along with the rotation of the rotating mechanism. The supporting door plate is used to support the flexible screen.

8. The rotating shaft structure according to claim 7, characterized in that: When the main swing arm includes a first main swing component and a second main swing component, both the first main swing component and the second main swing component are provided with a fixing column, and the main swing arm is connected to the supporting door panel via the fixing column.

9. The rotating shaft structure according to claim 7, characterized in that: The material of the supporting door panel includes super-high polymer material, and the supporting door panel is integrally formed.

10. The rotating shaft structure according to any one of claims 1 to 6, characterized in that: The rotating shaft structure also includes a decorative door panel, which is fixedly connected to the rotating mechanism and rotates along with the rotation of the rotating mechanism. The decorative door panel is used to shield the rotating mechanism, the synchronization mechanism and / or the damping mechanism.

11. The rotating shaft structure according to claim 10, characterized in that: When the auxiliary swing arm includes a swing arm rotating member and a sliding member, the decorative door panel is fixedly connected to a side of the sliding member away from the first protrusion, so that the decorative door panel is fixedly connected to the auxiliary swing arm; The decorative door panel is bent at two opposite ends to form a decorative slide groove between the bent portion and the unbent portion of the decorative door panel. Second protrusions are provided at the opposite ends of the connecting piece. The second protrusions are located in the decorative slide groove. The decorative door panel is slidably connected to the connecting piece via the decorative slide groove.

12. The rotating shaft structure according to claim 10, characterized in that: The material of the decorative door panel includes super-high polymer material, and the decorative door panel is integrally formed.

13. The rotating shaft structure according to claim 1, characterized in that: The number of the pin shaft, the number of the cam wheel and the first spring is two, and the number of the damping swing arms is four; The two pins are arranged side by side along the first direction, and the pins extend along the second direction. The concave wheel has two concave wheel holes, and the two concave wheel holes are arranged side by side along the first direction. The concave wheels are respectively sleeved on the two pins through the two concave wheel holes, and there is a gap between the two concave wheels. The two first springs are respectively sleeved on the two pins and are respectively located at the gap between the two concave wheels. The rotating cams of the two damping swing arms are arranged adjacent to one of the concave wheels and are located on the side of the concave wheel away from the first spring along the second direction. The rotating cams of the other two damping swing arms are arranged adjacent to the other concave wheel and are located on the side of the concave wheel away from the first spring along the second direction. Second convex columns are provided on both side walls of the end of the swinging member away from the rotating cam, a fifth connecting slide groove adapted to the damping swing arm is provided on the connecting member, and the side wall of the fifth connecting slide groove is partially recessed to form a second groove adapted to the second convex column, and the second convex column slides and rotates in the second groove, so that the damping mechanism is connected to the connecting member in a sliding and rotating manner; The first direction is the direction from the first body to the second body, and the second direction is the axial direction of the rotating shaft structure.

14. The rotating shaft structure according to claim 13, characterized in that: A connecting portion is provided between the two damping swing arms located on the same pin shaft, and two ends of the connecting portion are respectively fixedly connected to the two damping swing arms.

15. The rotating shaft structure according to claim 1, characterized in that: The compliant swing arm comprises a rotating shaft and a sliding part located on one side of the rotating shaft, a limit block is arranged on the sliding part, and third convex columns are arranged on both side walls of the sliding part away from the rotating shaft; The flexible beams are located on both sides of the connecting rod, and a limiting hole is provided on the connecting rod; The shaft cover is provided with a rotating hole adapted to the rotating shaft, so that the flexible swing arm is rotatably connected to the shaft cover; the connecting piece is provided with a fourth connecting slot, and the side wall of the fourth connecting slot is partially recessed to form a third groove adapted to the third convex column, and the third convex column slides and rotates in the third groove, so that the flexible swing arm is slidably and rotatably connected to the connecting piece; The flexible beams located on both sides of the connecting rod are respectively fixed on the non-recessed side walls of the fourth connecting slot, and the limit blocks of the flexible swing arm are clamped in the limit holes of the connecting rod to fix the flexible swing arm and the connecting rod.

16. The rotating shaft structure according to claim 2, characterized in that: A second convex strip is provided on both side walls of the lateral swing arm, a fifth connecting slide groove is provided on the connecting piece, and the side wall of the fifth connecting slide groove is partially recessed to form a fourth groove adapted to the second convex strip, and the second convex strip slides in the fourth groove, so that the lateral swing arm is slidably connected to the connecting piece; The shaft cover is provided with a third shaft cover sliding groove adapted to the lateral rotating part, and the lateral member is rotatably connected to the shaft cover through the lateral rotating part; The number of the lateral rotating parts is two, and the two lateral rotating parts are arranged at intervals; The lateral swing arm is a ring-shaped structure with an opening, and the two lateral rotating parts are respectively fixedly connected to the lateral swing arm and are located on both sides of the opening; The support member is located in the annular structure, and the roller is located at the gap between the two lateral rotating parts.

17. The rotating shaft structure according to claim 1, characterized in that: The number of the damping mechanisms is three.

18. The rotating shaft structure according to claim 17, characterized in that: The three damping mechanisms are all the convex-concave wheel damping mechanisms; or, the three damping mechanisms are all the compliant damping mechanisms; or, at least one of the three damping mechanisms is the convex-concave wheel damping mechanism, and at least one is the compliant damping mechanism.

19. The rotating shaft structure according to claim 2, characterized in that: The number of the damping mechanisms is three; At least one of the three damping mechanisms is the convex-concave wheel damping mechanism, and at least one is the lateral damping mechanism; or, At least one of the three damping mechanisms is the compliant damping mechanism, and at least one is the lateral damping mechanism.

20. A foldable terminal, characterized in that: The foldable terminal is an outward-folding foldable terminal, and the outward-folding foldable terminal comprises the hinge structure according to any one of claims 1-19.

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