Rotating shaft structure and foldable electronic device

Abstract

The present application provides a rotating shaft structure and a foldable electronic device, which can ensure a large damping force under the condition of thinning. The rotating shaft structure includes a first middle beam, a door panel and a damping mechanism; the damping mechanism includes a constraint part, two compression parts and a first elastic part; the two compression parts are located on the door panel and are both slidably connected to the door panel, the two compression parts are opposite to each other, and the first elastic part is located between the two opposite compression parts; the constraint part is rotatably connected to the first middle beam and is slidably connected to the door panel; the constraint part has a receiving cavity, the constraint part covers the door panel, and at least part of the two compression parts and the first elastic part is located in the receiving cavity; the two inner surfaces at one end of the receiving cavity are inclined surfaces; when the constraint part slides on the door panel, the two compression parts move on the two inclined surfaces respectively, and the two compression parts approach or move away from each other; when the two compression parts approach each other, the first elastic part is compressed, and both inclined surfaces receive the force perpendicular to the inclined surface generated by the compression of the first elastic part on the inclined surface.

Description

Technical Field

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

[0002] With the continuous development of display technology, foldable electronic devices (such as foldable mobile phones) have gradually become a development trend of future mobile electronic products. When in the unfolded state, a foldable electronic device can obtain a larger display area, enhancing the visual effect. When in the folded state, it can obtain a smaller volume, facilitating user carrying. Therefore, it is favored by more and more users.

[0003] The structure for realizing the unfolding or folding of a foldable electronic device is a rotating shaft structure with a damping (providing the feeling of opening and closing) function. Under the trend of the thinning of electronic devices, how to ensure a large damping force while thinning the rotating shaft structure is a technical problem to be solved urgently at present. Summary of the Invention

[0004] To solve the above technical problems, the present application provides a rotating shaft structure and a foldable electronic device. This rotating shaft structure can ensure a large damping force while thinning.

[0005] In a first aspect, an embodiment of the present application provides a rotating shaft structure, which includes: at least one rotating shaft member; the rotating shaft member includes a first middle beam, a door panel, and a damping mechanism; the first middle beam extends along a first direction; along a second direction, the door panel is located on at least one side of the first middle beam, and the second direction is different from the first direction; the damping mechanism includes a constraint part, two compression parts, and a first elastic part; the two compression parts are located on the door panel and are both slidably connected to the door panel, and the sliding direction of the compression part is the first direction; along the first direction, the two compression parts are opposite to each other, and the first elastic part is located between the two opposite compression parts; the constraint part is rotatably connected to the first middle beam and slidably connected to the door panel, and the sliding direction of the constraint part is the second direction; the constraint part has a receiving cavity, and the constraint part covers the door panel, so that at least part of the two compression parts and the first elastic part is located in the receiving cavity; along the second direction, the two inner surfaces at one end of the receiving cavity are inclined surfaces; when the constraint part slides along the second direction on the door panel, the two compression parts move on the two inclined surfaces respectively, and the two compression parts approach or move away from each other along the first direction; when the two compression parts approach each other along the first direction, the first elastic part is compressed, and both inclined surfaces receive the force perpendicular to the inclined surface generated by the compression of the first elastic part on the inclined surface.

[0006] Exemplarily, the first elastic part can be a spring (also referred to as the first spring)

[0007] Exemplarily, the first direction is perpendicular to the second direction.

[0008] For example, the first direction may be the Y-axis direction in the following content, and the second direction may be the X-axis direction in the following content.

[0009] Exemplarily, the inclined plane has an angle with the second direction, that is, the inclined plane is not parallel to the second direction, and the force perpendicular to the inclined plane applied to the inclined plane can be decomposed into a radial force (perpendicular to the first center beam), and the radial force has a damping torque relative to the approximate rotation center of the damping mechanism (the rotation center of the damping mechanism when it rotates relative to the first center beam).

[0010] In the present application, because the receiving cavity has two inclined surfaces, both inclined surfaces can generate a damping torque, resulting in the present application's rotating shaft structure having a relatively large damping torque. Furthermore, because the length direction of the first elastic portion is in the first direction, and the compression portion that compresses the first elastic portion is arranged in the first direction, the first elastic portion and the compression portion can be reduced in the second direction while maintaining the length of the first elastic portion (elastic force) unchanged, thereby reducing the size of the door panel in the second direction and facilitating the miniaturization of the rotating shaft structure. In other words, the rotating shaft structure can maintain a relatively large damping force while maintaining a relatively small size. Furthermore, by limiting the first elastic member in the thickness direction through the constraint portion that compresses the first elastic member, this can simplify the structure compared to placing the first elastic member alone within a limiting box (in the thickness direction, the limiting box includes a base plate and a cover plate, which limit the spring by the base plate and the cover plate). Furthermore, the thickness dimension of the damping mechanism can be reduced, resulting in a thinner shaft structure while maintaining a greater damping force at a thinner thickness without sacrificing torsional feel. Alternatively, while maintaining the same thickness of the shaft structure, the thickness dimension of the first elastic member can be increased, i.e., the thickness of the first elastic member is increased (the spring force increases proportionally with thickness), thereby increasing the damping torque of the damping mechanism. This generates a greater damping force during the rotation of the damping swing arm, allowing the damping swing arm to hover more stably at any position during the rotation process, and improving the damping feedback when the user rotates the damping swing arm, enhancing the user's feel when rotating the damping swing arm.

[0011] According to the first aspect, along the third direction, the first elastic part includes an upper surface and a lower surface, the upper surface is located on the side of the lower surface away from the door panel, and the third direction is perpendicular to the first direction and perpendicular to the second direction; along the second direction, the upper surface of the end of the first elastic part close to the first center beam is an arc surface, and the vertical distance from the arc surface to the lower surface gradually decreases from the end of the first elastic part away from the first center beam to the direction of the end of the first elastic part close to the first center beam.

[0012] Exemplarily, the third direction is perpendicular to the first direction and perpendicular to the second direction.

[0013] In this arrangement, even if the first elastic member is arranged at the end of the door panel close to the first center beam, it will not interfere with some structures. The size of the door panel in the second direction can be reduced, further reducing the size of the shaft structure in the second direction.

[0014] According to the first aspect, or any implementation of the first aspect above, along the third direction, the first elastic part includes an upper surface and a lower surface, the upper surface is located on the side of the lower surface away from the door panel, and the third direction is perpendicular to the first direction and perpendicular to the second direction; along the second direction, the upper surface of the end of the first elastic part close to the first center beam is a slope, and the vertical distance from the slope to the lower surface gradually decreases from the end of the first elastic part away from the first center beam to the direction of the end of the first elastic part close to the first center beam.

[0015] Exemplarily, the third direction is perpendicular to the first direction and perpendicular to the second direction.

[0016] In this arrangement, even if the first elastic member is arranged at the end of the door panel close to the first center beam, it will not interfere with some structures. The size of the door panel in the second direction can be reduced, further reducing the size of the shaft structure in the second direction.

[0017] According to the first aspect, or any implementation of the first aspect above, when the upper surface of the first elastic portion near one end of the first center beam is a curved surface, the area of the upper surface of the first elastic portion that is not a curved surface and the curved surface are connected by a curved surface; when the upper surface of the first elastic portion near one end of the first center beam is a sloped surface, the area of the upper surface of the first elastic portion that is not a sloped surface and the sloped surface are connected by a curved surface.

[0018] This arrangement can make the elastic force of the first elastic member greater.

[0019] According to the first aspect, or any implementation of the first aspect above, a curvature radius of a projection of the curved surface on the reference surface is greater than or equal to 0.3 mm, and the reference surface is perpendicular to the first direction.

[0020] Exemplarily, the reference plane may be a plane formed by the X-axis direction and the Z-axis direction.

[0021] By optimizing the dimensions of the first elastic member (e.g., optimizing the curvature radius R of the projection of the curved surface of the first elastic member on the plane formed by the X-axis and the Z-axis), even if a portion of the first elastic member is incomplete (being an inclined surface or an arc surface), the elastic force value of the first elastic member will not be affected. That is, when the upper surface of the first elastic member at one end close to the first center beam is set as an arc surface, and when the upper surface of the first elastic member at one end close to the first center beam is set as an inclined surface, the elastic force value of the first elastic member is substantially the same as the elastic force value of an ordinary spring, and no yield deformation will occur.

[0022] According to the first aspect, or any implementation of the above first aspect, the vertical distance from the edge of the arc surface or inclined surface of the first elastic part close to the first middle beam to the lower surface is greater than or equal to 0.4 mm.

[0023] By optimizing the size of the first elastic member (such as optimizing the vertical distance from the edge of the arc surface or inclined surface of the first elastic member close to the first middle beam to the lower surface, etc.), even if a partial area of the first elastic member is incomplete (being an inclined surface or an arc surface), it will not affect the elastic force value of the first elastic member. That is, the elastic force value of the first elastic member when the upper surface of the end of the first elastic member close to the first middle beam is set as an arc surface, the elastic force value of the first elastic member when the upper surface of the end of the first elastic member close to the first middle beam is set as an inclined surface, and the elastic force value of a common spring are basically the same, and no yield deformation will occur.

[0024] According to the first aspect, or any implementation of the above first aspect, along the second direction, retaining parts are arranged on both sides of the first elastic part. The first elastic part is limited in the second direction, making the structure more stable.

[0025] According to the first aspect, or any implementation of the above first aspect, the compression part includes a bearing plate. Along the third direction, the bearing plate includes a first surface, and convex columns are provided on the first surface. A rotating ring is sleeved on the convex columns and can rotate relative to the convex columns. The third direction is different from both the first direction and the second direction. When the constraint part slides along the second direction on the door panel, the two rotating rings in the two compression parts move on two inclined surfaces respectively.

[0026] With such a setting, when the compression part moves on the inclined surface, the friction with the inclined surface is reduced.

[0027] Exemplarily, the third direction is perpendicular to the first direction and perpendicular to the second direction.

[0028] According to the first aspect, or any implementation of the above first aspect, along the third direction, the bearing plate further includes a second surface, opposite to the first surface, and convex columns are also provided on the second surface. A sliding groove adapted to the convex columns on the second surface is provided on the door panel, so that the compression part is slidably connected to the door panel; a retaining wall is provided at the end of the first surface. Along the second direction, the retaining walls of the two compression parts face each other, and the first elastic part is located between the two opposite retaining walls. The structure of the bearing plate is simple and has a small volume, which is beneficial to the miniaturized design of the rotating shaft structure.

[0029] Exemplarily, the sliding groove extends along the first direction.

[0030] According to the first aspect, or any implementation of the above first aspect, the constraint portion includes a swing arm base, which is a structure formed by the opposite ends of a flat base protruding in the third direction along the first direction, and a first groove is formed between the two protrusions. The third direction is different from both the first direction and the second direction; the constraint portion further includes a constraint swing arm and a boss; along the second direction, the constraint swing arm and the boss are fixed to two opposite side walls of the swing arm base; the constraint swing arm is rotatably connected to the first middle beam so that the constraint portion is rotatably connected to the first middle beam; the number of bosses can be two. Along the first direction, the two bosses are located at opposite ends of one side wall of the swing arm base; the boss includes a shielding sub-portion extending along the first direction and a surrounding sub-portion extending along the third direction. One end of the shielding sub-portion is connected to one end of the surrounding sub-portion to form a card slot; the shielding sub-portion is located at a position where there is no protrusion on the side wall, and the surrounding sub-portion is located on the protruding side wall; the surrounding sub-portions of the two bosses are opposite to each other, and the openings of the two card slots are opposite to each other, and both card slots communicate with the first groove to form a receiving cavity.

[0031] With this setting, not only can the first elastic member be compressed, but also the first elastic portion can be limited in the third direction, eliminating the need for a separate structure to limit the first elastic member, simplifying the structure of the rotating shaft structure, and reducing the thickness of the rotating shaft structure.

[0032] According to the first aspect, or any implementation of the above first aspect, the surrounding sub-portion includes an inner surface and an outer surface along the first direction, and further includes an outer side wall and an inner side wall that connect the inner surface and the outer surface and face away from each other along the second direction. The inner side wall is connected to the swing arm base, and the connection between the outer side wall and the inner surface is an inclined surface. That is, only a partial area is an inclined surface, which is convenient for the preparation of the surrounding sub-portion.

[0033] According to the first aspect, or any implementation of the above first aspect, the constraint portion further includes two first sliders. Along the first direction, the two first sliders are located on two opposite side walls of the swing arm base; connection sliding grooves adapted to the two first sliders are formed on the door panel so that the constraint portion is slidably connected to the door panel. The structure of the constraint portion slidably connected to the door panel is simple.

[0034] According to the first aspect, or any implementation of the above first aspect, at least one first threaded hole is formed by partial depression at a position on the side wall of the swing arm base where no boss is provided; the damping mechanism further includes a first locking portion; along the second direction, a partial area at one end of the first locking portion protrudes and bends to form a first locking sub-portion, and a fixing hole is formed on the first locking sub-portion. The fixing hole on the first locking sub-portion is opposite to the first threaded hole; a screw passes through the fixing hole on the first locking sub-portion and is inserted into the first threaded hole to fixedly connect the first locking portion and the constraint portion.

[0035] The rotating shaft decorative member (covering the rotating shaft structure) can be fixed through the first locking portion, so that the electronic device applying this rotating shaft structure has a better appearance.

[0036] According to the first aspect, or any implementation manner of the above first aspect, the constraining portion further includes two second sliders. Along the first direction, the two second sliders are located on two opposite side walls of the swing arm base; along the first direction, opposite end portions of the first locking portion are bent, and a locking chute is formed between the bent portion and the unbent portion; the two second sliders are respectively located in the two locking chutes. This prevents the first locking portion from shaking in the third direction, making the rotating shaft structure more stable and reliable.

[0037] According to the first aspect, or any implementation manner of the above first aspect, the rotating shaft structure includes at least two rotating shaft members; the rotating shaft structure further includes at least one connecting member; along the first direction, at least one connecting member is provided between adjacent two rotating shaft members, and the connecting member is fixedly connected to the rotating shaft member. The rotating shaft structure is composed of different components, and some component structures are the same. In this way, it is convenient to prepare the rotating shaft structure, simplifies the process steps, and reduces the design and production costs.

[0038] According to the first aspect, or any implementation manner of the above first aspect, the connecting member includes a second middle beam and a supporting mechanism; the supporting mechanism is rotatably connected to the second middle beam. The supporting mechanism can support the middle area of the flexible display screen of the foldable electronic device to prevent problems such as depression, making the flexible display screen flatter.

[0039] According to the first aspect, or any implementation manner of the above first aspect, the rotation center when the supporting mechanism rotates relative to the second middle beam coincides with the rotation center when the constraining portion rotates relative to the first middle beam. When the rotating shaft structure rotates, it is more stable and will not have a shaking problem.

[0040] According to the first aspect, or any implementation manner of the above first aspect, the supporting mechanism includes a supporting portion; the supporting portion includes a supporting base; along the second direction, the supporting base is provided with a second threaded hole penetrating through two side walls; a screw is locked in the second threaded hole; a second elastic member and a sphere are arranged in the second threaded hole, and the second elastic member is located between the screw and the sphere; a concave pit is provided on the second middle beam; when the sphere contacts the second middle beam, the second elastic member is compressed until a partial area of the sphere is located in the concave pit. Such a setting can further increase the damping torque, which is beneficial to the arbitrary hovering of the foldable electronic device, etc.

[0041] According to the first aspect, or any implementation of the above first aspect, the support mechanism further includes a second locking portion; along the third direction, the second locking portion is located on one side of the support base, and along the second direction, a partial area at one end of the second locking portion protrudes and bends to form a second locking sub-portion, and a fixing hole is formed in the second locking sub-portion, and the fixing hole of the second locking sub-portion is opposite to the second threaded hole; a screw passes through the fixing hole of the second locking sub-portion and is inserted into the second threaded hole to fixedly connect the second locking portion and the support portion.

[0042] The rotating shaft decorative member (covering the rotating shaft structure) can be fixed through the second locking portion, so that the electronic device applying this rotating shaft structure has a better appearance.

[0043] According to the first aspect, or any implementation of the above first aspect, the support mechanism further includes a swing arm slideway disassembly member, and the swing arm slideway disassembly member is slidably connected to the support base; the swing arm slideway disassembly member is fixedly connected to the first body and the second body of the foldable electronic device.

[0044] That is, the fixed connection between the connecting member and the middle frame of the body can be realized directly through a swing arm slideway disassembly member, with a simple structure and low cost.

[0045] According to the first aspect, or any implementation of the above first aspect, the support portion further includes a third slider; a connection chute adapted to the support base is formed on the swing arm slideway disassembly member, and a groove adapted to the third slider is formed by partial depression of the side wall of the connection chute of the swing arm slideway disassembly member to enable the sliding connection between the swing arm slideway disassembly member and the support base; at least one fixing hole is formed in the area of the swing arm slideway disassembly member where the connection chute is not formed; the swing arm slideway disassembly member is fixedly connected to the first body and the second body of the foldable electronic device through the fixing hole.

[0046] In a second aspect, an embodiment of the present application provides a foldable electronic device, which includes a rotating shaft structure corresponding to the first aspect and any implementation of the first aspect.

[0047] The second aspect and any implementation of the second aspect respectively correspond to the first aspect and any implementation of the first aspect. The technical effects corresponding to the second aspect and any implementation of the second aspect can refer to the technical effects corresponding to the first aspect and any implementation of the first aspect above, and will not be elaborated here.

[0048] According to the second aspect, the foldable terminal further includes a first body, a second body and a flexible display screen; the rotating shaft structure is fixedly connected to the first body and the second body through the door panel; the flexible display screen is located on one side of the first body, the second body and the rotating shaft structure, and the flexible display screen is supported by the first body, the second body and the rotating shaft structure.

[0049] According to a second aspect, or any implementation manner of the above second aspect, the foldable electronic device is an outward-foldable electronic device. Description of the Drawings

[0050] Figure 1 FIG. is a schematic structural diagram of a foldable electronic device provided by an embodiment of the present application;

[0051] Figure 2 Shown is a schematic diagram of the folded foldable mobile phone;

[0052] Figure 3 is Figure 1 a sectional view of the shown foldable electronic device along the AA' direction;

[0053] Figure 4 FIG. is a schematic structural diagram of a rotating shaft structure provided by an embodiment of the present application;

[0054] Figure 5 FIG. is a front structural diagram of a rotating shaft structure, a first middle frame, and a second middle frame provided by an embodiment of the present application;

[0055] Figure 6 FIG. is a back structural diagram of a rotating shaft structure, a first middle frame, and a second middle frame provided by an embodiment of the present application;

[0056] Figure 7 FIG. is a schematic structural diagram of a rotating shaft member provided by an embodiment of the present application;

[0057] Figure 8 FIG. is a schematic structural diagram of a door panel provided by an embodiment of the present application from a perspective;

[0058] Figure 9 FIG. is a schematic structural diagram of a first middle beam provided by an embodiment of the present application;

[0059] Figure 10 FIG. is a schematic structural diagram of a door panel connecting member provided by an embodiment of the present application;

[0060] Figure 11 FIG. is a schematic structural diagram of a connecting portion provided by an embodiment of the present application;

[0061] Figure 12 FIG. is a connection relationship diagram of a door panel, a door panel connecting member, and a first middle beam provided by an embodiment of the present application;

[0062] Figure 13 FIG. is a schematic structural diagram of a synchronization mechanism provided by an embodiment of the present application;

[0063] Figure 14 FIG. is a schematic structural diagram of the door panel provided by an embodiment of the present application from another perspective;

[0064] Figure 15a Schematic front view of the first compression part and the second compression part provided by the embodiment of the present application;

[0065] Figure 15b Schematic back view of the first compression part and the second compression part provided by the embodiment of the present application;

[0066] Figure 16 Schematic view of the compression part without a rotating ring provided by the embodiment of the present application;

[0067] Figure 17a Schematic view of the positional relationship between the door panel and the compression part provided by the embodiment of the present application;

[0068] [[ID=*17]] Figure 17b Schematic view of the positional relationship between the door panel, the compression part and the first spring provided by the embodiment of the present application;

[0069] Figure 18 Schematic view of the constraint part from one perspective provided by the embodiment of the present application; y

[0070] Figure 19 Schematic view of the constraint part from another perspective provided by the embodiment of the present application;

[0071] Figure 20 Schematic view of a first locking part provided by the embodiment of the present application;

[0072] Figure 21 Schematic view of the positional relationship between the constraint part and the first locking part provided by the embodiment of the present application;

[0073] Figure 22 Schematic view of the positional relationship between the door panel and the damper provided by the embodiment of the present application;

[0074] Figure 23 Schematic diagram of the principle of the damping mechanism providing damping force provided by the embodiment of the present application;

[0075] Figure 24 Schematic view of a first spring provided by the embodiment of the present application;

[0076] Figure 25 Schematic view of the door panel from another perspective provided by the embodiment of the present application;

[0077] Figure 26 Z Schematic view of a positional relationship of a swing arm base, a constraint swing arm, a first spring and a door panel in a folded state provided by the embodiment of the present application;

[0078] Figure 27 Schematic view of another positional relationship of a swing arm base, a constraint swing arm, a first spring and a door panel in a folded state provided by the embodiment of the present application;

[0079] Figure 28 Another positional relationship diagram of the swing arm base, the restraint swing arm, the first spring, and the door panel provided by the embodiment of the present application in the folded state;

[0080] Figure 29a A schematic structural diagram of the first spring of the embodiment of the present application during simulation is shown;

[0081] Figure 29b A comparative simulation diagram of the related art and the embodiment of the present application is shown;

[0082] Figure 30 A front structural schematic diagram of a connecting member provided by the embodiment of the present application;

[0083] Figure 31 A back structural schematic diagram of a connecting member provided by the embodiment of the present application;

[0084] Figure 32 A structural schematic diagram of a support mechanism provided by the embodiment of the present application;

[0085] Figure 33 A structural schematic diagram of the support part provided by the embodiment of the present application from one perspective;

[0086] Figure 34 A structural schematic diagram of the support part provided by the embodiment of the present application from another perspective;

[0087] Figure 35 A back structural schematic diagram of the connecting member without a connecting plate provided by the embodiment of the present application;

[0088] Figure 36 A structural schematic diagram of a swing arm slide disassembled part provided by the embodiment of the present application;

[0089] Figure 37 is Figure 30 A cross-sectional view of the shown connecting member along the BB' direction;

[0090] Figure 38 A positional relationship diagram of the second middle beam and the support base when the included angle between the plane where the first support member of the first middle frame and the plane where the second support member of the second middle frame provided by the embodiment of the present application is the first included angle;

[0091] Figure 39 A positional relationship diagram of the second middle beam and the support base when the included angle between the plane where the first support member of the first middle frame and the plane where the second support member of the second middle frame provided by the embodiment of the present application is the second included angle. Detailed implementation manners

[0092] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0093] In this document, the term "and / or" is merely a description of the association relationship between associated objects, indicating that three relationships may exist. For example, A and / or B may represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0094] The terms "first", "second", etc. in the description and claims of the embodiments of the present application are used to distinguish different objects, rather than to describe a specific order of the objects. For example, the first target object and the second target object are used to distinguish different target objects, rather than to describe a specific order of the target objects.

[0095] In the embodiments of the present application, words such as "exemplary" or "for example" are used to give examples, illustrations, or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0096] In the description of the embodiments of the present application, unless otherwise specified, the meaning of "a plurality of" refers to two or more. For example, a plurality of processing units refers to two or more processing units; a plurality of systems refers to two or more systems.

[0097] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to specific situations.

[0098] The embodiments of the present application provide a foldable electronic device. The foldable electronic device provided by the embodiments of the present application may be a mobile phone, a tablet computer, a personal digital assistant (PDA for short), an in-vehicle computer, a television, a smart wearable device, a smart home device, etc. The embodiments of the present application do not limit the specific form of the above foldable electronic device. For the convenience of description below, it is described by taking the foldable electronic device as a foldable mobile phone as an example.

[0099] See Figure 1 , Figure 1 which is a schematic structural diagram of a foldable electronic device provided by an embodiment of the present application. As Figure 1 shown, the foldable mobile phone 100 includes a flexible display screen (also referred to as a foldable screen or a flexible screen) 10.

[0100] The flexible display screen 10 is a flexible display screen. The flexible display screen 10 may include an Organic Light Emitting Diode (OLED) display screen. The OLED display screen does not require a backlight module, and the substrate in the OLED display screen may be made of a flexible resin material, such as Polyethyleneterephthalate (PET), so that the OLED display screen has the characteristic of being bendable. Of course, the type of the flexible display screen 10 includes but is not limited to the OLED display screen, and any display screen that can be bent is within the protection scope of the present application. For example, it may also be a Liquid Crystal Display (LCD) screen, an LED display screen (such as including a Micro-LED display screen, a Mini-LED display screen), etc.

[0101] It should be noted that, for the convenience of clearly describing the subsequent structural features and the positional relationship of the structural features, the positional relationship of each structure in the foldable mobile phone 100 is defined in the X-axis direction, the Y-axis direction, and the Z-axis direction. Among them, the X-axis direction is the width direction after the foldable mobile phone 100 is unfolded, the Y-axis direction is the length direction after the foldable mobile phone 100 is unfolded, and the Z-axis direction is the thickness direction after the foldable mobile phone 100 is unfolded.

[0102] Continue to refer to Figure 1 , the foldable mobile phone 100 further includes a first body 20, a second body 30, and a rotating shaft structure 40. Along the X-axis direction, the first body 20 and the second body 30 are located on both sides of the rotating shaft structure 40, and the rotating shaft structure 40 is respectively connected to the first body 20 and the second body 30. The first body 20, the rotating shaft structure 40, and the second body 30 can be used to carry the flexible display screen 10. The first body 20 and the second body 30 can respectively rotate around the rotating shaft structure 40, so that the flexible display screen 10 is in a folded or unfolded state, that is, the foldable mobile phone 100 is in a folded or unfolded state.

[0103] The flexible display screen 10 can be divided into different parts. When folded, the part of the flexible display screen 10 that is bent is the bent display segment 12. Along the X-axis direction, in the flexible display screen 10, the parts located on both sides of the bent display segment 12 are the first flat display segment 11 and the second flat display segment 13 respectively. During the process of the folding mobile phone 100 changing from the unfolded state to the folded state, the angle between the plane where the first flat display segment 11 is located and the plane where the second flat display segment 13 is located changes with the bending of the bent display segment 12, for example, changing from 180° to 0°.

[0104] It can be understood that the folding mobile phone 100 includes two states during use, namely the folded state and the unfolded state. In the unfolded state, the first body 20 and the second body 30 are generally located in the same plane, so that the flexible display screen 10 is generally flat. Users can operate the flexible display screen 10, and the flexible display screen 10 can display information such as images or videos to achieve large-screen display and improve the user's viewing experience. And when the folding mobile phone 100 is in the unfolded state, the first body 20 and the second body 30 can rotate towards each other (that is, the relative rotation of the first body 20 and the second body 30 approaching each other), thereby driving the folding of the rotating shaft structure 40. During the folding process, the ends of the first body 20 and the second body 30 away from the rotating shaft structure 40 approach each other until they touch. At this time, the folding mobile phone 100 is in the folded state. In this folded state, the folding mobile phone 100 is convenient for storage and carrying. And when the folding mobile phone 100 is in the folded state, the first body 20 and the second body 30 can rotate (the rotation direction is opposite to the rotation direction during folding), thereby driving the rotating shaft structure 40 to unfold, so that the folding mobile phone 100 is in the unfolded state. Therefore, in this application, the rotating shaft structure 40 is used to realize the folding and unfolding of the folding mobile phone 100.

[0105] It should be noted that the folding mobile phone 100 can be folded at multiple positions. Correspondingly, the folding mobile phone 100 can include multiple rotating shaft structures 40 and multiple bodies. For example, it can include two rotating shaft structures 40 and three bodies. Adjacent two bodies are connected by a rotating shaft structure 40. In this way, the folding mobile phone 100 has two folding positions. It can be seen that the structural components include at least one rotating shaft structure 40 and at least two bodies, and adjacent two bodies are connected by a rotating shaft structure 40. For the convenience of description, the embodiments of this application are all described by taking the folding mobile phone 100 including one rotating shaft structure 40 and two bodies (that is, the first body 20 and the second body 30) as an example.

[0106] It also needs to be noted that Figure 1 and Figure 2The description is given by taking the folding mobile phone 100 as an example of folding along the longitudinal direction (i.e., the Y-axis direction), that is, when the folding mobile phone 100 is folded, it forms two screens on the left and right. However, this does not limit the present application. In other alternative embodiments of the present application, the folding mobile phone 100 can also be folded along the transverse direction (i.e., the X-axis direction), that is, when the folding mobile phone 100 is folded, it forms two screens on the upper and lower. The following content is all described by taking the folding mobile phone 100 folding along the longitudinal direction as an example.

[0107] Figure 1 The figure shows a schematic diagram of the unfolded folding mobile phone. Figure 2 The figure shows a schematic diagram of the folded folding mobile phone. Figure 2 In, when the folding mobile phone 100 is folded, it can be folded in the direction away from the light-emitting direction of the flexible display screen 10 ( Figure 1 the direction indicated by the arrow in), that is, the direction in which the first body part 20 and the second body part 30 rotate around the rotating shaft structure 40 is opposite to the light-emitting direction of the flexible display screen 10. In this case, the folding mobile phone 100 can also be called an outward folding folding mobile phone. Of course, when the folding mobile phone 100 is folded, it can also be folded in the light-emitting direction of the flexible display screen 10, that is, the direction in which the first body part 20 and the second body part 30 rotate around the rotating shaft structure 40 is the same as the light-emitting direction of the flexible display screen 10. In this case, the folding mobile phone 100 can also be called an inward folding folding mobile phone. The embodiments of the present application are described by taking the folding mobile phone 100 as an outward folding folding mobile phone as an example.

[0108] See Figure 3 , Figure 3 is Figure 1 a cross-sectional view of the folding electronic device shown along the AA' direction. As Figure 3 shown, 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.

[0109] The first outer shell 21 can be the rear cover (also called the battery cover) of the folding mobile phone 100; it can also be a display screen for display. The embodiments of the present application do not limit this. The second outer shell 31 can be the rear cover (also called the battery cover) of the folding mobile phone 100; it can also be a display screen for display. The embodiments of the present application do not limit this either.

[0110] The first middle frame 22 includes a first appearance member (the structure of the first middle frame 22 exposed on the outside) 221 and a first support member 222 located between the first flat display segment 11 and the first outer shell 21. The first appearance member 221 is fixedly connected to the first support member 222. Among them, the first appearance member 221 and the first support member 222 can be integrally formed or separately formed, and then fixed together by welding, bonding or other means. The second middle frame 32 includes a second appearance member (the structure of the second middle frame 32 exposed on the outside) 321 and a second support member 322 located between the second flat display segment 13 and the second outer shell 31. The second appearance member 321 is fixedly connected to the second support member 322. Among them, the second appearance member 321 and the second support member 322 can be integrally formed or separately formed, and then fixed together by welding, bonding or other means.

[0111] The first flat display segment 11 of the flexible display screen 10, the first appearance member 221, and the first outer shell 21 enclose a first accommodation cavity 23. The second flat display segment 13 of the flexible display screen 10, the second appearance member 321, and the second outer shell 31 enclose a second accommodation cavity 33. Structures such as printed circuit boards, flexible circuit boards, functional devices, and batteries (not shown in the figure) are provided in the first accommodation cavity 23 and the second accommodation cavity 33. Among them, the functional devices include, for example, a processing module, a voltage conversion module, etc. The first support member 222 of the first middle frame 22 and the second support member 322 of the second middle frame 32 support some structures in the flexible display screen 10 and the accommodation cavity. For example, the flexible display screen 10 can be bonded to the first support member 222 of the first middle frame 22 and the second support member 322 of the second middle frame 32 through a back adhesive (not shown in the figure), and the flexible display screen 10 is supported by the first support member 222 and the second support member 322.

[0112] As can be seen from the above, the rotating shaft structure 40 is an important component for the folding or unfolding of the foldable electronic device. Usually, the rotating shaft structure 40 has a damping mechanism, so that the foldable electronic device is subjected to the damping force provided by the damping mechanism during the folding and unfolding processes, so that the first body 20 and the second body 30 of the foldable electronic device can hover at any angle, while improving the operating feel of folding or unfolding, or enabling the foldable electronic device to stably remain in the folded position or the unfolded position.

[0113] However, under the trend of the thinning of electronic devices, the space for the foldable electronic device to accommodate the rotating shaft structure 40 is getting smaller and smaller. Restricted by the space, the damping mechanism is difficult to provide a damping force of sufficient magnitude, making it difficult for the first body 20 and the second body 30 to stably hover at any rotation position when rotating relative to each other. At the same time, when the user rotates the first body 20 and the second body 30, it is difficult to obtain a sufficient damping feedback, reducing the user's feel when using the foldable electronic device.

[0114] Based on this, an embodiment of the present application provides a rotating shaft structure. The thickness of this rotating shaft structure is relatively thin, and a large damping force is ensured at the relatively thin thickness without losing the torsional feel.

[0115] The following introduces the specific structure of the rotating shaft structure provided by the embodiment of the present application.

[0116] See Figure 4 , Figure 4 which is a schematic structural diagram of a rotating shaft structure provided by an embodiment of the present application. As Figure 4 shown, the rotating shaft structure 40 includes at least two rotating shaft members 40a and at least one connecting member 40b. A connecting member 40b is arranged between two adjacent rotating shaft members 40a. Among them, Figure 4 an example of the rotating shaft structure 40 including two rotating shaft members 40a and one connecting member 40b is used for illustration.

[0117] The two rotating shaft members 40a include a first rotating shaft member 40a1 and a second rotating shaft member 40a2. Along the Y-axis direction, the first rotating shaft member 40a1, the connecting member 40b, and the second rotating shaft member 40a2 are arranged in sequence. The connecting member 40b can be strip-shaped and can extend along the Y-axis direction. One end of the connecting member 40b is connected to the first rotating shaft member 40a1, and the other end is connected to the second rotating shaft member 40a2. The first rotating shaft member 40a1 and the second rotating shaft member 40a2 have the same structure and are symmetrically arranged with respect to the connecting member 40b. The first rotating shaft member 40a1 and the second rotating shaft member 40a2 have the same structure. In this way, it is convenient for the preparation of the rotating shaft structure 40, simplifies the process steps, and reduces the design and production costs.

[0118] See Figure 5 and Figure 6 , Figure 5 which is a schematic front view structure diagram of a rotating shaft structure, a first middle frame, and a second middle frame provided by an embodiment of the present application, Figure 6 which is a schematic back view structure diagram of a rotating shaft structure, a first middle frame, and a second middle frame provided by an embodiment of the present application. As Figure 5 and Figure 6As shown, along the X-axis direction, the first middle frame 22 and the second middle frame 32 are respectively located on both sides of the rotating shaft structure 40, and the first rotating shaft member 40a1, the connecting member 40b, and the second rotating shaft member 40a2 are respectively fixedly connected to the first middle frame 22 and the second middle frame 32 (which will be described below and will not be elaborated here). A flexible display screen 10 can be arranged on the back of the rotating shaft structure 40, the first middle frame 22, and the second middle frame 32, and the flexible display screen 10 is supported by the first middle frame 22, the rotating shaft structure 40, and the second middle frame 32. A first outer shell 21 can be arranged on the front of the first middle frame 22, and a second outer shell 31 can be arranged on the front of the second middle frame 32 to form a first accommodating cavity 23 and a second accommodating cavity 33 for accommodating structures such as a printed circuit board, a flexible circuit board, functional devices, and a battery.

[0119] In addition, in order to ensure that the folding mobile phone 100 has a good appearance, and / or, in order to protect the rotating shaft structure 40, etc., the rotating shaft structure 40 further includes a rotating shaft decorative member (not shown in the figure), which is located between the first outer shell 22 and the second outer shell 32. During the folding or unfolding process of the folding mobile phone 100, the rotating shaft decorative member is used to block the rotating shaft structure 40. In some embodiments, along the X-axis direction, the two edges of the rotating shaft decorative member respectively extend below the first outer shell 22 and the second outer shell 32. In this way, it is avoided that there is a gap between the rotating shaft decorative member and the first outer shell 22, and it is avoided that there is a gap between the rotating shaft decorative member and the second outer shell 32, further ensuring that the folding mobile phone 100 has a good appearance, and / or protecting the rotating shaft structure 40, etc. It should be noted here that the two edges of the rotating shaft decorative member respectively extending below the first outer shell 22 and the second outer shell 32 refers to the position of the two edges of the rotating shaft decorative member relative to the first outer shell 22 and the second outer shell 32 when the folding mobile phone 100 is placed flat and the first outer shell 22 and the second outer shell 32 face upward (towards the user).

[0120] See Figure 7 , Figure 7 is a schematic structural diagram of a rotating shaft member provided by an embodiment of the present application. As Figure 7As shown, the rotating shaft member 40a includes a first center beam 41, a rotating mechanism 42, a synchronization mechanism 43, a damping mechanism 44, two door panels 45 and two door panel connecting members 46, wherein the two door panels 45 are respectively a first door panel 451 and a second door panel 452, and the two door panel connecting members 46 are respectively a first door panel connecting member 461 and a second door panel connecting member 462. Along the X-axis direction, the first door panel 451 and the second door panel 452 are arranged on both sides of the first center beam 41, the first door panel connecting member 461 is located between the first door panel 451 and the first center beam 41, the first door panel connecting member 461 is respectively connected to the first door panel 451 and the first center beam 41 for rotation, the second door panel connecting member 462 is located between the second door panel 452 and the first center beam 41, the second door panel connecting member 462 is respectively connected to the second door panel 452 and the first center beam 41 for rotation. Figure 5 The rotating shaft 40a is fixedly connected to the first middle frame 22 through the first door panel 451 and is fixedly connected to the second middle frame 32 through the second door panel 452.

[0121] For example, combined Figure 8 , Figure 8 A schematic structural diagram of a door panel provided in an embodiment of the present application at one viewing angle. At least one first connecting hole 453 is formed on the first door panel 451 and the second door panel 452. The first door panel 451 is fixedly connected to the first fuselage 20 through the first connecting hole 453 thereon. For example, the first door panel 451 is fixedly connected to the first support member 222 of the first middle frame 22 through the first connecting hole 453 thereon to achieve a fixed connection with the first fuselage 20; the second door panel 452 is fixedly connected to the second fuselage 30 through the first connecting hole 453 thereon. For example, the second door panel 452 is fixedly connected to the second support member 322 of the second middle frame 32 through the first connecting hole 453 thereon to achieve a fixed connection with the second fuselage 30, that is, the rotating shaft member 40a of the rotating shaft structure 40 is fixedly connected to the first middle frame 22 and the second middle frame 32 through the two door panels 45, thereby achieving connection with the first fuselage 20 and the second fuselage 30, so that the first fuselage 20 and the second fuselage 30 can be folded or unfolded through the rotating shaft structure 40.

[0122] In some embodiments, see Figure 4 The rotating shaft 40a further includes a first cover plate 41a. The first cover plate 41a is located on the first center beam 41 along the Z-axis, for example, on a side of the first center beam 41 facing away from the flexible display screen 10. The first cover plate 41a is fixedly connected to the first center beam 41 to protect or enclose the structure on the first center beam 41.

[0123] It should be noted that, in order to clearly show the first middle beam 41, the rotating mechanism 42, the synchronizing mechanism 43, the damping mechanism 44 and other structures of the rotating shaft structure 40, Figure 7The first cover plate 41a is not shown (which may block some areas of the first middle beam 41, the rotating mechanism 42, the synchronizing mechanism 43, and the damping mechanism 44).

[0124] See Figure 9 , Figure 9 which is a schematic structural diagram of a first middle beam provided by an embodiment of the present application. As Figure 9 shown, the first middle beam 41 may include an axially covered part 411 and an axial body 412 connected to each other. Along the Y-axis direction, the axially covered part 411 is located on one side of the axial body 412. The axially covered part 411 can be approximately an elliptical plate-like structure. The axially covered part 411 can be used as an appearance decoration part of the folding mobile phone. The axial body 412 can be in a strip or column shape as a whole, and its extending direction is the Y-axis direction. The inside of the axial body 412 can be divided into several spaces for installing the rotating mechanism 42, the synchronizing mechanism 43, and the damping mechanism 44 (which will be introduced in detail below and will not be elaborated here).

[0125] Combined with Figure 4 and Figure 6 , the axially covered parts 411 of the two rotating shaft parts 40a can be arranged back to back along the Y-axis direction, and both axially covered parts 411 can be exposed outside the flexible display screen 10, that is, the two axially covered parts 411 can be respectively located on two opposite outer sides of the flexible display screen 10 in the Y-axis direction.

[0126] Continuing to refer to Figure 7 , the number of the rotating mechanisms 42 can be multiple. Exemplarily, the number of the rotating mechanisms 42 is two. Along the Y-axis direction, the two rotating mechanisms 42 are distributed on both sides of the damping mechanism 44 and can be symmetrically arranged with respect to the damping mechanism 44. The synchronizing mechanism 43 is located on one side of one of the rotating mechanisms 42 away from the damping mechanism 44 and is adjacent to the connecting part 40b.

[0127] The rotating mechanism 42 includes two rotating swing arms 421 respectively arranged on both sides of the first middle beam 41 along the X-axis direction. Combined with Figure 10 , Figure 10 which is a schematic structural diagram of a door panel connecting part provided by an embodiment of the present application. One of the rotating swing arms 421 is fixed to the first door panel connecting part 461, and the rotating swing arm 421 and the first door panel connecting part 461 can be integrally formed or separately formed and then fixed together by welding, bonding, etc.; the other rotating swing arm 421 is fixed to the second door panel connecting part 462, and the rotating swing arm 421 and the second door panel connecting part 462 can be integrally formed or separately formed and then fixed together by welding, bonding, etc. The rotating swing arm 421 includes a first swing part 4211 and a second swing part 4212 which are fixedly connected. The cross-sectional shapes of the first swing part 4211 and the second swing part 4212 are, for example, both arc-shaped or approximately arc-shaped, that is, the projections of the first swing part 4211 and the second swing part 4212 on the plane formed by the X-axis and the Z-axis are both arc-shaped or approximately arc-shaped.

[0128] Continue to refer to Figure 7 , connection parts 453 are provided on both door panels 45, that is, a connection part 453 is provided on the first door panel 451, and a connection part 453 is provided on the second door panel 452. The connection part 453 on the first door panel 451 is fixedly connected to the first door panel 451. The first door panel 451 and the connection part 453 can be integrally formed or separately formed, and then fixed together by welding, bonding, interference fit, etc.; the connection part 453 on the second door panel 452 is fixedly connected to the second door panel 452. The second door panel 452 and the connection part 453 can be integrally formed or separately formed, and then fixed together by welding, bonding, interference fit, etc. In the embodiment of the present application, the description is made by taking the door panel 45 and the connection part 453 as being separately formed as an example.

[0129] Refer to Figure 11 , Figure 11 is a schematic structural diagram of a connection part provided by an embodiment of the present application. As Figure 11 shown, the connection part 453 includes a fixing sub-part 4531 and a connecting sub-part 4532 fixedly connected to the fixing sub-part 4531. A cylindrical protruding sub-part 4534 is provided on the fixing sub-part 4531. Combining Figure 8 , a circular third fixing hole 454 is provided on the door panel 45. The third fixing hole 454 can be a through hole or a blind hole. The diameter of the protruding sub-part 4534 is larger than the diameter of the third fixing hole 454. In this way, the protruding sub-part 4534 of the fixing sub-part 4531 can be fixed in the third fixing hole 454 of the door panel 45 by interference fit, realizing the fixed connection between the connection part 453 and the door panel 45.

[0130] Refer to Figure 12 , Figure 12 is a connection relationship diagram of a door panel, a door panel connecting piece and a first middle beam provided by an embodiment of the present application. As Figure 11 and Figure 12 shown, a first connection chute 4533 adapted to the second pendulum 4212 is formed on the connecting sub-part 4532. At least part of the second pendulum 4212 is located in the first connection chute 4533 to be rotatably connected to the first door panel connecting piece 461 through the first connection chute 4533 of the first door panel 451 and rotatably connected to the second door panel connecting piece 462 through the first connection chute 4533 of the second door panel 452. As Figure 9 and Figure 12As shown in the figure, a first axle body chute 4121 adapted to a first ornament 4211 of a first door panel connecting member 461 and a first axle body chute 4121 adapted to the first ornament 4211 of a second door panel connecting member 462 are provided on a first middle beam 41. At least a part of the first ornament 4211 of the first door panel connecting member 461 is located in one of the first axle body chutes 4121, and at least a part of the first ornament 4211 of the second door panel connecting member 462 is located in the other first axle body chute 4121, so as to realize the rotational connection between the first middle beam 41 and the first door panel connecting member 461 and the second door panel connecting member 462. That is to say, the first door panel connecting member 461 realizes the rotational connection with the first middle beam 41 and the first door panel 451 through a rotational swing arm 421 thereon, and the second door panel connecting member 462 realizes the rotational connection with the first middle beam 41 and the second door panel 452 through the rotational swing arm 421 thereon. Thus, when the position of the first middle beam 41 remains unchanged, the first door panel 451 and the second door panel 452 can rotate relative to the first middle beam 41, and the opening and closing of the first fuselage 20 and the second fuselage 30 can be realized.

[0131] See Figure 13 , Figure 13 This is a schematic structural diagram of a synchronization mechanism provided by an embodiment of the present application. As Figure 13 shown, the synchronization mechanism 43 includes two synchronization parts 431 arranged side by side in the X-axis direction. The synchronization part 431 includes a synchronization swing arm 4311 and a gear 4312. The gears 4312 of the two synchronization parts 431 are meshed with each other, and the synchronization swing arms 4311 of the two synchronization parts 431 in the X-axis direction are respectively arranged on both sides of the two meshed gears 4312.

[0132] The gear 4312 includes a gear part 43121 and two gear rotating parts (also called gear shafts) 43122 located on both sides of the gear part 43121 in the Y-axis direction. The two gears 4312 are meshed with each other through the gear part 43121. Combining Figure 9 , a rotation hole 4122 adapted to the gear rotating part 43122 is provided on the first middle beam 41. The gear rotating parts 43122 of the two gears 4312 are inserted into the rotation holes 4122 in a one-to-one correspondence, so as to realize the rotational connection between the synchronization mechanism 43 and the first middle beam 41. Two fourth sliders 43111 arranged in opposite directions in the Y-axis direction are provided on both side walls of one end of the synchronization swing arm 4311 away from the gear 4312.

[0133] See Figure 14 , Figure 14 This is a schematic structural diagram of a door panel provided by an embodiment of the present application from another perspective. As Figure 14As shown, a second connection chute 455 adapted to the synchronous swing arm 4311 is formed on the door panel 45, and a partial depression is formed on the side wall of the second connection chute 455 to form a second groove 456 adapted to the two fourth sliders 43111. The fourth slider 43111 slides in the second groove 456 to realize the sliding connection between the synchronous mechanism 43 and the door panel 45.

[0134] As can be seen from the above, the synchronous mechanism 43 is slidably matched with the door panel 45 through the fourth slider 43111, and the first door panel 451 and the second door panel 452 are synchronously rotated through the engagement of the gears 4312, ensuring the synchronism of the first door panel 451 and the second door panel 452, and further ensuring the synchronism of the first body 20 and the second body 30.

[0135] It should be noted here that the number and installation position of the synchronous mechanism 43 in the rotating shaft member 40a in this application embodiment are not limited, and those skilled in the art can select the number and installation position of the synchronous mechanism 43 according to the actual situation. This application embodiment takes the number of the synchronous mechanism 43 in the rotating shaft member 40a as one as an example for illustration.

[0136] The damping mechanism 44 provides a damping force, enabling the first body 20 and the second body 30 of the foldable mobile phone 100 to hover at any angle during the opening and closing process, while improving the operating feel of folding or unfolding, or enabling the foldable electronic device to stably maintain the folded position or the unfolded position. The number of the damping mechanisms 44 in the rotating shaft member 40a in this application embodiment is not limited, and those skilled in the art can set it according to the actual situation. Continuing to refer to Figure 7 This application embodiment takes the number of the damping mechanism 44 in the rotating shaft member 40a as one as an example for illustration.

[0137] The damping mechanism 44 includes two damping members 441 arranged along the X-axis direction. The damping member 441 includes a constraint portion 4411, two compression portions 4412, a first spring 4413, and a first locking portion 4414. The two compression portions 4412 include a first compression portion 44121 and a second compression portion 44122 arranged in opposite directions along the Y-axis direction, and the first compression portion 44121 and the second compression portion 44122 are symmetrically arranged.

[0138] Refer to Figure 15a 、 Figure 15b and Figure 16 , Figure 15a is a front structural schematic diagram of the first compression portion and the second compression portion provided by this application embodiment, Figure 15b is a back structural schematic diagram of the first compression portion and the second compression portion provided by this application embodiment, Figure 16 is a structural schematic diagram of the compression portion without a rotating ring provided by this application embodiment. As Figure 15a 、Figure 15b and Figure 16 As shown, the compression portion 4412 includes a supporting plate 44123. Along the Z-axis direction, the supporting plate 44123 includes a first surface 44123a and a second surface 44123b opposite to each other. Bosses 44124 are provided on the first surface 44123a and the second surface 44123b of the supporting plate 44123. The number of the bosses 44124 on the first surface 44123a of the supporting plate 44123 can be one, and the number of the bosses 44124 on the second surface 44123b of the supporting plate 44123 can be two. The boss 44124 on the first surface 44123a of the supporting plate 44123 is sleeved with a rotating ring 44125, and the rotating ring 44125 can rotate relative to the boss 44124 on the first surface 44123a.

[0139] A retaining wall 44126 is provided at the end of the first surface 44123a of the support plate 44123. Along the Y-axis, the retaining wall 44126 of the first compression portion 44121 and the retaining wall 44126 of the second compression portion 44122 are arranged opposite each other. To avoid the rotating ring 44125, the retaining walls 44126 of the first compression portion 44121 and the retaining walls 44126 of the second compression portion 44122 are curved toward the rotating ring 44125.

[0140] Combine Figure 8 The door panel 45 is provided with a first sliding groove 4571 that is adapted to the boss 44124 on the second surface 44123b of the first compression portion 44121, and a second sliding groove 4572 that is adapted to the boss 44124 on the second surface 44123b of the second compression portion 44122. The first sliding groove 4571 and the second sliding groove 4572 extend along the Y-axis direction, and along the Y-axis direction, the first sliding groove 4571 and the second sliding groove 4572 both include a first end 457a and a second end 457b. The second end 457b of the first sliding groove 4571 is located on a side of the first end 457a of the first sliding groove 4571 that is away from the first end 457a of the second sliding groove 4572, and the second end 457b of the second sliding groove 4572 is located on a side of the first end 457a of the second sliding groove 4572 that is away from the first end 457a of the first sliding groove 4571.

[0141] See also Figure 17a , Figure 17a This is a diagram showing the positional relationship between the door panel and the compression portion provided in the embodiment of the present application. Figure 17aAs shown, the convex posts 44124 on the second surface 44123b of the first compression part 44121 are inserted into the first sliding grooves 4571 one by one. The convex posts 44124 on the second surface 44123b of the first compression part 44121 can move along the Y-axis direction within their corresponding first sliding grooves 4571. The convex posts 44124 on the second surface 44123b of the second compression part 44122 are inserted into the second sliding grooves 4572 one by one. The convex posts 44124 on the second surface 44123b of the second compression part 44122 can move along the Y-axis direction within their corresponding second sliding grooves 4572. And the retaining walls 44126 of the first compression part 44121 and the retaining walls 44126 of the second compression part 44122 are opposite to each other.

[0142] See Figure 17b , Figure is a positional relationship diagram of the door panel, the compression part and the first spring provided by the embodiment of the present application. As ​ shown, the first spring 4413 is located between the first compression part 44121 and the second compression part 44122, and one end contacts the retaining wall 44126 of the first compression part 44121, and the other end contacts the retaining wall 44126 of the second compression part 44122. When the first spring 4413 is arranged between the first compression part 44121 and the second compression part 44122, the first spring 4413 is in a compressed state. Due to the elastic force of the first spring 4413, the first compression part 44121 is located at the second end 457b of the first sliding groove 4571, and the second compression part 44122 is located at the second end 457b of the second sliding groove 4572. And when the first compression part 44121 and the second compression part 44122 move towards each other (which will be introduced in the following content and will not be elaborated here), the first spring 4413 can be further compressed.

[0143] Continue to see ​ and ​ , ​ , in order to limit the first spring 4413 in the X-axis direction, a surrounding part 458 for surrounding the first spring 4413 is provided on the door panel 45. The door panel 45 and the surrounding part 458 can be integrally formed or separately formed and then fixed together by welding, bonding and other methods. Along the X-axis direction, the surrounding part 458 includes a first surrounding sub-part 4581 and a second surrounding sub-part 4582 arranged oppositely. Along the X-axis direction, the first surrounding sub-part 4581 is located on the side of the second surrounding sub-part 4582 away from the first middle beam 41. The shapes of the projections of the first surrounding sub-part 4581 and the second surrounding sub-part 4582 on the plane formed by the X-axis and the Y-axis are, for example, both "C" shapes, and the openings of the first surrounding sub-part 4581 and the second surrounding sub-part 4582 are opposite to each other.

[0144] See ​ and ​, ​ This is a schematic structural view of the constraint part provided by an embodiment of the present application from one perspective. ​ This is a schematic structural view of the constraint part provided by an embodiment of the present application from another perspective. As ​ and ​ shown, the constraint part 4411 includes a swing arm base 44111, and the swing arm base 44111 is a structure formed by the opposite ends of a flat base protruding in the Z-axis direction along the Y-axis direction, and a first groove 44111a is formed between the two protrusions. The constraint part 4411 further includes a constraint swing arm 44112 and a boss 44113. Along the X-axis direction, the constraint swing arm 44112 and the boss 44113 are fixed on two opposite side walls of the swing arm base 44111. The swing arm base 44111, the constraint swing arm 44112, and the boss 44113 can be integrally formed or separately formed and then fixed together by welding, bonding, etc.

[0145] The number of the constraint swing arms 44112 can be two. Along the Y-axis direction, the two constraint swing arms 44112 are located at the opposite ends of one side wall of the swing arm base 44111.

[0146] The number of the bosses 44113 can be two. Along the Y-axis direction, the two bosses 44113 are located at the opposite ends of the other side wall of the swing arm base 44111, and at least one first threaded hole 44116 is formed by partial depression at the position of the side wall where the boss 44113 is not provided.

[0147] The boss 44113 includes a shielding sub-part 44113a extending along the Y-axis direction and an enclosing sub-part 44113b extending along the Z-axis direction. One end of the shielding sub-part 44113a is connected to one end of the enclosing sub-part 44113b to form a card slot 44113c. The shielding sub-part 44113a can be located at the position where there is no protrusion on the side wall, and the enclosing sub-part 44113b can be located on the protruding side wall. The enclosing sub-parts 44113b of the two bosses 44113 are opposite to each other, and the openings of the two card slots 44113c are opposite to each other. The card slots 44113c of the two bosses 44113 are both communicated with the first groove 44111a to form a large receiving cavity 44113d.

[0148] Continue to refer to ​ , the enclosing sub-part 44113b includes an inner surface 44113b1 and an outer surface 44113b2 that are opposite to each other along the Y-axis direction, and further includes an outer side wall 44113b3 and an inner side wall (connected to the swing arm base 44111) that are opposite to each other along the X-axis direction and connect the inner surface 44113b1 and the outer surface 44113b2. The connection between the outer side wall 44113b3 and the inner surface 44113b1 is an inclined surface, that is, the outer side wall 44113b3 and the inner surface 44113b1 are connected through an inclined surface 44113b4.

[0149] The restraining part 4411 further includes two first sliders 44114 and two second sliders 44115. Along the Y-axis direction, the two first sliders 44114 are located on two opposite side walls of the swing arm base 44111, and the two second sliders 44115 are also located on two opposite side walls of the swing arm base 44111. And along the Z-axis direction, the first slider 44114 and the second slider 44115 on the same side wall are respectively located at two opposite ends of this side wall.

[0150] See ​ and ​ , ​ FIG. ​ is a schematic structural diagram of a first locking part provided by an embodiment of the present application. ​ and ​ As shown in FIG. and FIG., along the Y-axis direction, two opposite end portions of the first locking part 4414 are bent, and a locking chute 44141 is formed between the bent portion and the unbent portion. Along the Z-axis direction, the unbent portion of the first locking part 4414 is located on the swing arm base 44111, and the two second sliders 44115 of the restraining part 4411 are respectively located in the two locking chutes 44141. In addition, along the X-axis direction, a local area at one end of the first locking part 4414 protrudes and bends to form a first locking sub-part 44142. A first fixing hole 44143 is provided on the first locking sub-part 44142. The first locking sub-part 44142 contacts the side wall of the swing arm base 44111 provided with the boss 44113, and the first fixing hole 44143 on the first locking sub-part 44142 is opposite to the first threaded hole 44116. A screw (not shown in the figure) passes through the first fixing hole 44143 and is inserted into the first threaded hole 44116 to realize the fixed connection between the first locking part 4414 and the restraining part 4411.

[0151] A second fixing hole 44144 is provided in the unbent portion of the first locking part 4414. As can be known from the foregoing, the rotating shaft structure 40 further includes a rotating shaft decorative part that shields the rotating shaft structure 40. The protrusion provided on the rotating shaft decorative part is inserted into the second fixing hole 44144, and through bonding and other means, the fixed connection between the rotating shaft decorative part and the first locking part 4414 is realized, and further the fixed connection with the rotating shaft structure 40 is realized.

[0152] See ​ , ​ is a position relationship diagram of a door panel and a damping member provided by an embodiment of the present application. As shown in FIG. ​ and ​As shown, a third connection chute 459 adapted to the two first sliders 44114 is formed in the door panel 45. The two first sliders 44114 are respectively located in the two third connection chutes 459 and can slide in their corresponding third connection chutes 459 to realize the sliding connection between the damping mechanism 44 and the door panel 45.

[0153] It should be noted here that, in order to clearly show the constraint part 4411, ​ the first locking part 4414 is not shown.

[0154] Continue to refer to ​ , a second shaft body chute 4123 adapted to the constraint swing arm 44112 of one of the damping members 441 is formed in the first middle beam 41, and a second shaft body chute 4123 adapted to the constraint swing arm 44112 of the other damping member 441. Continue to refer to ​ , at least a part of the constraint swing arm 44112 of one of the damping members 441 is located in one of the second shaft body chutes 4123, and at least a part of the constraint swing arm 44112 of the other damping member 441 is located in the other second shaft body chute 4123 to realize the rotational connection between the damping mechanism 44 and the first middle beam 41. And the setting of the constraint part 4411 of one of the damping members 441 makes the rotational degree of freedom of the first door panel 451 and the first door panel connecting member 461 unique, and the setting of the constraint part 4411 of the other damping member 441 makes the rotational degree of freedom of the second door panel 452 and the second door panel connecting member 462 unique, thereby making the rotating shaft structure 40 more stable.

[0155] Continue to refer to ​ and ​ , when the two first sliders 44114 are respectively located in the two third connection chutes 459, at least part of the two compression parts 4412 and the first spring 4413 on the door panel 45 where the two third connection chutes 459 are located are located in the receiving cavity 44113d of the constraint part 4411 where the two first sliders 44114 are located.

[0156] Continue to refer to ​ , when the folding mobile phone 100 is in the unfolded state, a part of the first slider 44114 is only located at the end of the third connection chute 459 facing the first middle beam 41. Therefore, the constraint part 4411 can only cover a part of the two compression parts 4412 and the first spring 4413, and the constraint part 4411 can limit the first spring 4413 in the Z-axis direction. And at this time, the first compression part 44121 can still be located at the second end 457b of the first sliding chute 4571, and the second compression part 44122 can still be located at the second end 457b of the second sliding chute 4572, that is, the compression amount of the first spring 4413 remains unchanged at this time, and the elastic force of the first spring 4413 remains unchanged.

[0157] During the process of the folding mobile phone 100 rotating from the unfolded state to the folded state, refer to ​ , ​ which is a schematic diagram of providing damping force for the damping mechanism provided in the embodiment of the present application. As ​ shown, when the first slider 44114 moves in the third connecting chute 459 in a direction away from the first middle beam 41, the inclined surfaces 44113b4 of the two enclosing sub-parts 44113b respectively exert extrusion on the rotating ring 44125 on the first compression part 44121 and the rotating ring 44125 on the second compression part 44122. As the first slider 44114 continues to move in the third groove 459 in a direction away from the first middle beam 41, the rotating ring 44125 on the first compression part 44121 and the rotating ring 44125 on the second compression part 44122 respectively continue to move along their corresponding inclined surfaces 44113b4 (towards the direction of the first middle beam 41), and at the same time rotate around their corresponding convex columns 44124 to reduce the friction with the inclined surface 44113b4 during the movement. The part of the first slider 44114 in the third groove 459 is increasing, that is, the constraint part 4411 covers more and more areas of the two compression parts 4412 and the first spring 4413.

[0158] When the rotating ring 44125 on the first compression part 44121 and the rotating ring 44125 on the second compression part 44122 respectively move along their corresponding inclined surfaces 44113b4 (towards the direction of the first middle beam 41), the first compression part 44121 and the second compression part 44122 move towards each other in the Y-axis direction, and the distance between the rotating ring 44125 on the first compression part 44121 and the rotating ring 44125 on the second compression part 44122 in the Y-axis direction decreases, that is, the length of the first spring 4413 becomes smaller, and the elastic force of the spring increases. For example, when the rotating ring 44125 on the first compression part 44121 and the rotating ring 44125 on the second compression part 44122 start to move on their corresponding inclined surfaces 44113b4 (towards the direction of the first middle beam 41), the length of the first spring 4413 is L1; when the rotating ring 44125 on the first compression part 44121 and the rotating ring 44125 on the second compression part 44122 move some distance on their corresponding inclined surfaces 44113b4 (towards the direction of the first middle beam 41), the length of the first spring 4413 is L2, L2 is less than L1, and the first spring 4413 is further compressed.

[0159] Continue to refer to ​, when the rotating ring 44125 moves on its corresponding inclined surface 44113b4, it is tangent to the inclined surface 44113b4. The inclined surfaces 44113b4 of the two enclosing parts 44113b are both subjected to the elastic force F1 perpendicular to the inclined surface 44113b4 generated when the first spring 4413 is compressed. This elastic force F1 is decomposed into a radial force F2 (in the X-axis direction when the folding mobile phone 100 is in the unfolded state) and an axial force F3 (in the Y-axis direction). The radial force F2 has a damping moment with respect to the rotation center of the restraining arm 44112 of the damper 441 (i.e., the rotation center when the restraining arm 44112 of the damper 441 rotates in the second shaft body chute 4123). For example, this moment is 100 N / mm, and the four inclined surfaces 44113b4 corresponding to the two rotating shaft members 40a will generate a damping moment of 400 N / mm.

[0160] That is to say, during the process of the folding mobile phone 100 rotating from the unfolded state to the folded state, the first slider 44114 moves away from the first middle beam 41 in the third groove 459, so that the inclined surfaces 44113b4 of the two enclosing parts 44113b respectively exert pressure on the rotating ring 44125 on the first compression part 44121 and the rotating ring 44125 on the second compression part 44122, thereby further compressing the first spring 4413 and generating a larger damping moment. In this way, during the process of the folding mobile phone 100 rotating from the unfolded state to the folded state, the first body 20 and the second body 30 of the foldable electronic device can hover at any angle. In addition, since the length direction of the first spring 4413 is the Y-axis direction and the compression part 4412 for compressing the first spring 4413 is arranged in the Y-axis direction, it is possible to reduce the occupation of the door panel 45 in the X-axis direction by the first spring 4413 and the compression part 4412 while ensuring that the length of the first spring 4413 remains unchanged (the elastic force remains unchanged), reduce the size of the door panel 45 in the X-axis direction, and is beneficial to the miniaturized design of the rotating shaft structure 40. That is, the rotating shaft structure 40 can ensure a large damping force under a smaller volume. In addition, by providing a retaining part 458 on the door panel 45 to limit the first spring 4413 in the X-axis direction, and by the restraining part 4411 for compressing the first spring 4413 to limit the first spring 4413 in the Z-axis direction, compared with setting the first spring 4413 alone in a limiting box (along the Z-axis direction, the limiting box includes a bottom plate and a cover plate, and the spring is limited in the Z-axis direction by the bottom plate and the cover plate), the structure can be simplified, and the size of the damping mechanism 44 in the Z-axis direction can be reduced, so that the thickness of the rotating shaft structure is thinner, and a large damping force can be ensured under a thinner thickness without losing the torque feel; or, when the thickness of the rotating shaft structure remains unchanged, the size of the first spring 4413 in the Z-axis direction can be increased, that is, the thickness of the first spring 4413 is increased (the force of the spring increases in direct proportion to the thickness), and the damping moment of the damper 441 is increased.

[0161] In some embodiments, referring to ​ , ​ is a schematic structural view of a first spring provided by an embodiment of the present application, ​ is a schematic structural view of the door panel provided by an embodiment of the present application from another perspective, ​ is a positional relationship diagram of a swing arm base, a restraint swing arm, a first spring, and a door panel in a folded state provided by an embodiment of the present application. As ​ shown, along the Z-axis direction, the first spring 4413 includes an upper surface 44131 and a lower surface 44132. Among them, the lower surface 44132 contacts the door panel 45, and the upper surface 44131 is located on the side of the lower surface 44132 away from the door panel 45. Along the X-axis direction, the upper surface 44131 of the end of the first spring 4413 close to the first middle beam 41 is an arc surface, and in the direction from the end of the first spring 4413 away from the first middle beam 41 to the end of the first spring 4413 close to the first middle beam 41, the vertical distance from the arc surface to the lower surface 44132 gradually decreases. Correspondingly, the upper surface of the first retaining portion 4581 is also an arc surface. In the direction from the end of the first spring 4413 away from the first middle beam 41 to the end of the first spring 4413 close to the first middle beam 41, the distance from the combined arc surface formed by the arc surface of the first spring 4413 and the arc surface of the first retaining portion 4581 to the door panel 45 gradually decreases. And the combined arc surface formed by the arc surface of the first spring 4413 and the arc surface of the first retaining portion 4581 has the same shape as the arc surface of the restraint swing arm 44112.

[0162] Alternatively, referring to ​ , ​ is another positional relationship diagram of a swing arm base, a restraint swing arm, a first spring, and a door panel in a folded state provided by an embodiment of the present application. As ​ shown, along the X-axis direction, the upper surface 44131 of the end of the first spring 4413 close to the first middle beam 41 is an inclined surface, and in the direction from the end of the first spring 4413 away from the first middle beam 41 to the end of the first spring 4413 close to the first middle beam 41, the vertical distance from the inclined surface to the lower surface 44132 gradually decreases. Correspondingly, the upper surface of the first retaining portion 4581 is also an inclined surface. In the direction from the end of the first spring 4413 away from the first middle beam 41 to the end of the first spring 4413 close to the first middle beam 41, the distance from the combined inclined surface formed by the inclined surface of the first spring 4413 and the inclined surface of the first retaining portion 4581 to the door panel 45 gradually decreases.

[0163] As can be seen from the foregoing, during the process of the folding mobile phone 100 rotating from the unfolded state to the folded state, the first slider 44114 moves in the third connecting chute 459 in a direction away from the first middle beam 41, and more and more of the part of the first slider 44114 is in the third groove 459, that is, the constraint part 4411 covers an increasing area of the two compression parts 4412 and the first spring 4413. By setting the upper surface 44131 of the end of the first spring 4413 close to the first middle beam 41 and the upper surface of the first retaining part 4581 as an arc surface or an inclined surface, it is possible to avoid interference between the first spring 4413 and the first retaining part 4581 and the constraint swing arm 44112 when the folding mobile phone 100 is in the folded state. That is to say, when the folding mobile phone 100 is in the folded state, even if the first spring 4413 and the first retaining part 4581 are located below the constraint swing arm 44112, they will not interfere with the rotation of the constraint swing arm 44112. In this way, the first spring 4413 can move in the direction towards the first middle beam 41, further reducing the size of the rotating shaft structure 40 in the X-axis direction.

[0164] The following illustrates this effect through a comparative example. Refer to ​ , ​ which is another positional relationship diagram of the swing arm base, the constraint swing arm, the first spring and the door panel provided by the embodiment of the present application in the folded state. As ​ shown, in order to avoid interference between the first spring 4413 and the first retaining part 4581 and the constraint swing arm 44112 when the folding mobile phone 100 is in the folded state. The first spring 4413 and the first retaining part 4581 need to move in a direction away from the first middle beam 41, which increases the size of the rotating shaft structure 40 in the X-axis direction. If the upper surface 44131 of the end of the first spring 4413 close to the first middle beam 41 and the upper surface of the first retaining part 4581 are set as an arc surface or an inclined surface, even if the first spring 4413 and the first retaining part 4581 are located below the constraint swing arm 44112, they will not interfere with the rotation of the constraint swing arm 44112. In this way, the first spring 4413 can move in the direction towards the first middle beam 41, reducing the size of the rotating shaft structure 40 in the X-axis direction.

[0165] Continue to refer to ​ , ​ and ​ , in some embodiments, the non-arc surface area and the arc surface on the upper surface 44131 of the first spring 4413 are connected by a curved surface, so that the non-arc surface area and the arc surface on the upper surface 44131 of the first spring 4413 are smoothly transitionally connected. And the radius of curvature R of the projection of the curved surface on the plane formed by the X-axis and the Z-axis is greater than or equal to 0.3 mm. Exemplarily, the radius of curvature R of the projection of the curved surface on the plane formed by the X-axis and the Z-axis is 0.3 mm, 0.4 mm, 0.5 mm or 0.6 mm. Continue to refer to​ and ​ In some embodiments, the vertical distance H3 from the edge of the arc surface or inclined surface of the first spring 4413 close to the first middle beam 41 to the lower surface 44132 is greater than or equal to 0.4 mm. Exemplarily, H3 is 0.4 mm, 0.5 mm, 0.6 mm, or 0.7 mm.

[0166] With such a setting, even if a partial area of the first spring 4413 is incomplete (being an inclined surface or an arc surface), it will not affect the elastic force value of the first spring 4413 and will not cause yield deformation.

[0167] To illustrate this beneficial effect, the following will be described in detail by comparing with the related art.

[0168] ​ shows a schematic structural diagram of the first spring of the embodiment of the present application for simulation, ​ shows a comparative simulation diagram between the related art and the embodiment of the present application. ​ On the first spring 4413 in, there is a compression surface, that is, during simulation, the first spring 4413 is compressed through the compression surface. ​ In (1) of, it is a schematic structural diagram of the first spring 4413 when the upper surface 44131 at one end of the first spring 4413 close to the first middle beam 41 is set as an arc surface. ​ In (2) of, it is a schematic structural diagram of the first spring 4413 when the upper surface 44131 at one end of the first spring 4413 close to the first middle beam 41 is set as an inclined surface. ​ The simulation diagram of is a relationship diagram between the compression amount of the first spring and the elastic force of the first spring. The abscissa is the displacement amount of the compression of the first spring, and the maximum displacement value during compression is 1.2 mm. The ordinate is the elastic force value of the first spring after compression. ​ In (1) of, it is a relationship diagram between the compression amount and the elastic force of an ordinary spring (a spring in which the upper surface 44131 at one end of the first spring 4413 close to the first middle beam 41 is not set as an arc surface or an inclined surface). ​ In (2) of, it is a relationship diagram between the compression amount of the first spring and the elastic force of the first spring when the upper surface 44131 at one end of the first spring 4413 close to the first middle beam 41 is set as an arc surface. ​ In (3) of, it is a relationship diagram between the compression amount of the first spring and the elastic force of the first spring when the upper surface 44131 at one end of the first spring 4413 close to the first middle beam 41 is set as an inclined surface, and ​ The curve ① in represents the elastic force curve of the first spring 4413 when the first spring 4413 is compressed. As can be seen from ​ the curve ① in, as the compression amount of the first spring 4413 increases, the elastic force of the first spring 4413 becomes greater and greater; ​The curve ② in ​ represents the elastic force curve of the first spring 4413 when the compressed first spring 4413 is released. As can be seen from

[0169] the curve ② in ​ , as the compression amount of the first spring 4413 decreases, the elastic force of the first spring 4413 becomes smaller and smaller. ​ As can be seen from ​ the curve ① and curve ② in (2) in ​ and the curve ① and curve ② in (1) in ​ are basically the same. The curve ① and curve ② in (3) in ​ have the same trend as the curve ① and curve ② in (1) in ​ , and the curve ① and curve ② in (3) in ​ are smoother. In addition, as can be seen from ​ the (2) and (3), when the compression amount of the first spring in the embodiment of the present application is 1.2 mm, the elastic force can also reach 25 - 30 N, which is basically the same as the elastic force value of the ordinary spring when the compression amount is 1.2 mm. It can be seen from this that by optimizing the size of the first spring 4413 (such as optimizing the vertical distance H3 from the edge of the arc surface or inclined surface of the first spring 4413 close to the first middle beam 41 to the lower surface 44132, the curvature radius R of the projection of the curved surface on the plane formed by the X-axis and the Z-axis, the thickness of each layer of the first spring, the spacing between adjacent layers, and / or the length and width of the first spring, etc.), even if a part of the first spring 4413 is incomplete (is an inclined surface or an arc surface), it will not affect the elastic force value of the first spring 4413, that is, the elastic force value of the first spring 4413 when the upper surface 44131 at the end of the first spring 4413 close to the first middle beam 41 is set as an arc surface, the elastic force value of the first spring 4413 when the upper surface 44131 at the end of the first spring 4413 close to the first middle beam 41 is set as an inclined surface is basically the same as the elastic force value of the ordinary spring, and no yield deformation will occur.

[0170] See ​ and ​ . ​ FIG. ​ is a front structural schematic diagram of a connector provided by an embodiment of the present application, ​ and ​ is a back structural schematic diagram of a connector provided by an embodiment of the present application. As shown in ​ and ​ , the connector 40b includes a second middle beam 47, two connecting plates 48, and two supporting mechanisms 49. Among them, the two connecting plates 48 are respectively a first connecting plate 481 and a second connecting plate 482, and the two supporting mechanisms 49 are respectively a first supporting mechanism 491 and a second supporting mechanism 492. Along the X-axis direction, the first connecting plate 481 and the second connecting plate 482 are arranged on both sides of the second middle beam 47. Combining ​, along the Y-axis direction, both ends of the first connecting plate 481 are fixedly connected to the first door plate connecting member 461 of the first rotating shaft member 40a1 and the first door plate connecting member 461 of the second rotating shaft member 40a2 respectively, and both ends of the second connecting plate 482 are fixedly connected to the second door plate connecting member 462 of the first rotating shaft member 40a1 and the second door plate connecting member 462 of the second rotating shaft member 40a2 respectively.

[0171] Continue to refer to ​ , the second middle beam 47 includes a first part 471 and two second parts 472. Along the Y-axis direction, the two second parts 472 are located at opposite ends of the first part 471 and are fixedly connected. At least one second connection hole 4721 is formed on each of the two second parts 472. Combining ​ , the first middle beam 41 of the first rotating shaft member 40a1 is opposite to the second connection hole 4721 on one of the second parts 472 through the third connection hole 413 thereon (that is, the projection of the third connection hole 413 on the plane formed by the X-axis and the Y-axis overlaps with the projection of the second connection hole 4721 on the plane formed by the X-axis and the Y-axis), and then the first middle beam 41 of the first rotating shaft member 40a1 and the second middle beam 47 can be fixedly connected by bolts; the first middle beam 41 of the second rotating shaft member 40a2 is opposite to the second connection hole 4721 on the other second part 472 through the third connection hole 413 thereon, and then the first middle beam 41 of the second rotating shaft member 40a2 and the second middle beam 47 can be fixedly connected by bolts, thereby realizing the fixed connection of the connecting member 40b and the first rotating shaft member 40a1 and the second rotating shaft member 40a2.

[0172] In some embodiments, continue to refer to ​ , the connecting member 40b further includes a second cover plate 47a. Along the Z-axis direction, the second cover plate 47a is located on the second middle beam 47 and is fixedly connected to the second middle beam 47, and can protect or enclose the structure on the second middle beam 47, etc.

[0173] It should be noted here that, in order to clearly show the second middle beam 47 and other structures of the connecting member 40b, ​ the second cover plate 47a is not shown (it will block some areas of the second middle beam 47). Refer to ​ , ​ is a schematic structural diagram of a support mechanism provided by an embodiment of the present application. As ​ shown, the support mechanism 49 includes a support portion 493 and a second locking portion 494.

[0174] Refer to ​ and ​ , ​ is a schematic structural diagram of the support portion provided by an embodiment of the present application from a perspective, ​This is a schematic structural diagram of the support part provided by the embodiment of the present application from another perspective. As ​ and ​ shown, the support part 493 includes a support base 4931, a support swing arm 4932, and two third sliders 4933. Along the X-axis direction, the support base 4931 is provided with a second threaded hole 4934 penetrating through two side walls, and the support swing arm 4932 is located on one side wall of the support base 4931. Along the Y-axis direction, the two third sliders 4933 are located on two opposite side walls of the support base 4931.

[0175] Continue to refer to ​ , along the Z-axis direction, the second locking part 494 is located on one side of the support base 4931, and along the X-axis direction, a partial area at one end of the second locking part 494 protrudes and bends to form a second locking sub-part 4941. A fourth fixing hole is provided on the second locking sub-part 4941, and the fourth fixing hole of the second locking sub-part 4941 is opposite to the second threaded hole 4934. A screw 4942 passes through the fourth fixing hole and inserts into the second threaded hole 4934 to realize the fixed connection between the second locking part 494 and the support part 493.

[0176] A fifth fixing hole 4943 is provided in the unbent part of the second locking part 494. As can be seen from the foregoing, the rotating shaft structure 40 further includes a rotating shaft decorative part that shields the rotating shaft structure 40. The protrusion provided on the rotating shaft decorative part is inserted into the fifth fixing hole 4943, and through bonding or other means, the fixed connection between the rotating shaft decorative part and the second locking part 494 is realized, and further the fixed connection with the rotating shaft structure 40 is realized.

[0177] Refer to ​ , ​ This is a schematic back structure diagram of the connecting part without setting the connecting plate provided by the embodiment of the present application. As ​ and ​As shown, a sliding groove (not shown due to occlusion) adapted to the support swing arms 4932 of the two support mechanisms 49 is provided on the second middle beam 47. The two support swing arms 4932 are respectively located in their corresponding sliding grooves to achieve the rotational connection between the support mechanism 49 and the second middle beam 47. And the rotation center of one of the support mechanisms 49 relative to the second middle beam 47 coincides with the rotation center of the restraint swing arm 44112 of one of the damping members 441 relative to the first middle beam 41 (that is, the projection of the rotation center of one of the support mechanisms 49 relative to the second middle beam 47 on the plane formed by the X-axis and the Z-axis coincides with the projection of the rotation center of the restraint swing arm 44112 of one of the damping members 441 relative to the first middle beam 41 on the plane formed by the X-axis and the Z-axis). The rotation center of the other support mechanism 49 relative to the second middle beam 47 coincides with the rotation center of the restraint swing arm 44112 of the other damping member 441 relative to the first middle beam 41 (that is, the projection of the rotation center of the other support mechanism 49 relative to the second middle beam 47 on the plane formed by the X-axis and the Z-axis coincides with the projection of the rotation center of the restraint swing arm 44112 of the other damping member 441 relative to the first middle beam 41 on the plane formed by the X-axis and the Z-axis).

[0178] See ​ , ​ is a schematic structural diagram of a swing arm slideway disassembling part provided by an embodiment of the present application. As ​ shown, the support mechanism 49 further includes a swing arm slideway disassembling part 495. A fourth connection sliding groove 4951 adapted to the support base 4931 is provided on the swing arm slideway disassembling part 495, and a third groove 4952 adapted to the two third sliders 4933 is formed by partial depression of the side wall of the fourth connection sliding groove 4951. Combining ​ and ​ , the two third sliders 4933 slide in the two third grooves respectively to achieve the sliding connection between the swing arm slideway disassembling part 495 and the support base 4931. At least one sixth fixing hole 4953 is provided in the area of the swing arm slideway disassembling part 495 where the fourth connection sliding groove 4951 is not provided. Correspondingly, seventh fixing holes are provided in the first middle frame 22 and the second middle frame 32 (not shown due to occlusion ​ in the figure). A screw passes through the sixth fixing hole 4953 of the swing arm slideway disassembling part 495 of one of the support mechanisms 49 and the seventh fixing hole of the first middle frame 22 to lock and fix the swing arm slideway disassembling part 495 of one of the support mechanisms 49 to the first middle frame 22. Another screw passes through the sixth fixing hole 4953 of the swing arm slideway disassembling part 495 of the other support mechanism 49 and the seventh fixing hole of the second middle frame 32 to lock and fix the swing arm slideway disassembling part 495 of the other support mechanism 49 to the second middle frame 32.

[0179] See ​ ,​ The ​ sectional view of the shown connecting member along the BB' direction. As ​ shown, the second threaded hole 4934 is provided with a second spring 4935 and a sphere (such as a steel ball) 4936. The second spring 4935 is located between the screw 4942 and the sphere 4936. A pit 473 is provided on the second middle beam 47. When the folding mobile phone 100 is in the unfolded state, a partial area of the sphere 4936 is located in the pit 473.

[0180] When the included angle between the plane where the first support member 222 of the first middle frame 22 is located and the plane where the second support member 322 of the second middle frame 32 is located is a first included angle (such as 90°), refer to ​ , ​ This is a positional relationship diagram of the second middle beam and the support base when the included angle between the plane where the first support member of the first middle frame provided in the embodiment of the present application is located and the plane where the second support member of the second middle frame is located is the first included angle. The sphere 4936 does not contact the second middle beam 47.

[0181] When the included angle between the plane where the first support member 222 of the first middle frame 22 is located and the plane where the second support member 322 of the second middle frame 32 is located is a second included angle (the second included angle is greater than the first included angle, and the second included angle is such as 150°), refer to ​ , ​ This is a positional relationship diagram of the second middle beam and the support base when the included angle between the plane where the first support member of the first middle frame provided in the embodiment of the present application is located and the plane where the second support member of the second middle frame is located is the second included angle. The sphere 4936 starts to contact the second middle beam 47. It should be noted here that ​ and ​ only show the support base of one support mechanism 49. The support base 4931 of the other support mechanism 49 and the second middle beam 47 are the same as this.

[0182] Continue to refer to ​, during the process that the included angle between the plane where the first support member 222 of the first middle frame 22 is located and the plane where the second support member 322 of the second middle frame 32 is located rotates from the second included angle to the third included angle (the third included angle is greater than the second included angle, and if the third included angle is 180°), the second middle beam 47 exerts extrusion on the sphere 4936, causing the sphere 4936 to compress the second spring 4935 and be in a compressed state. Moreover, as the included angle increases, the compression amount increases and the elastic force increases. This elastic force is a radial force, and this elastic force has a damping moment with respect to the rotation center when the support mechanism 49 rotates relative to the second middle beam 47 (that is, the rotation center when the support swing arm 4932 of the support mechanism 49 rotates in the chute located on the second middle beam 47 that it fits). This moment can be 30 - 50 N / mm, further improving the damping moment of the rotating shaft structure 40. That is to say, by arranging the support mechanism 49 on the connecting member 40b, not only can the middle area of the flexible display screen 10 be supported, but also the damping moment can be further improved.

[0183] In summary, for the rotating shaft structure provided by the embodiment of the present application, when the size in the Z-axis direction is small (that is, the thickness is small), it can provide sufficient damping moment to ensure that the first fuselage 20 and the second fuselage 30 stably hover at any rotation position, while improving the operation feel of folding or unfolding, or enabling the foldable electronic device to stably maintain the folded position or the unfolded position.

[0184] The above is described. 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 foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A rotating shaft structure, characterized in that, include: at least one rotating shaft; The rotating shaft member includes a first center beam, a door panel and a damping mechanism; The first center beam extends along a first direction; The door panel is located on at least one side of the first center beam along a second direction, the second direction being different from the first direction; The damping mechanism includes a restraining portion, two compression portions, and a first elastic portion; the two compression portions are located on the door panel and are both slidably connected to the door panel, and the sliding direction of the compression portions is the first direction; along the first direction, the two compression portions are opposite to each other, and the first elastic portion is located between the two opposing compression portions; The restraining portion is rotatably connected to the first center beam and slidably connected to the door panel, and the sliding direction of the restraining portion is a second direction; The restraining portion has a receiving cavity, and the restraining portion is covered on the door panel so that at least part of the two compression portions and the first elastic portion are located in the receiving cavity; Along the second direction, two inner surfaces of one end of the receiving cavity are inclined surfaces; When the restraining part slides along the second direction on the door panel, the two compression parts move on the two inclined surfaces respectively, and the two compression parts approach each other or move away from each other along the first direction; when the two compression parts approach each other along the first direction, the first elastic part is compressed, and both of the inclined surfaces are subjected to the force perpendicular to the inclined surfaces generated by the first elastic part when it is compressed.

2. The shaft structure according to claim 1, characterized in that, Along a third direction, the first elastic portion includes an upper surface and a lower surface, the upper surface is located on a side of the lower surface away from the door panel, and the third direction is different from both the first direction and the second direction; Along the second direction, the upper surface of the end of the first elastic part close to the first middle beam is a curved surface, and the vertical distance from the end of the first elastic part away from the first middle beam to the direction of the end of the first elastic part close to the first middle beam gradually decreases.

3. The shaft structure according to claim 1, characterized in that, Along a third direction, the first elastic portion includes an upper surface and a lower surface, the upper surface is located on a side of the lower surface away from the door panel, and the third direction is different from both the first direction and the second direction; Along the second direction, the upper surface of the end of the first elastic part close to the first center beam is an inclined surface, and the vertical distance from the inclined surface to the lower surface gradually decreases from the end of the first elastic part away from the first center beam to the direction of the end of the first elastic part close to the first center beam.

4. The rotating shaft structure according to claim 2 or 3, characterized in that, When the upper surface of the end of the first elastic portion close to the first center beam is a curved surface, the area of the upper surface of the first elastic portion that is not a curved surface and the curved surface are connected by a curved surface; When the upper surface of the end of the first elastic portion close to the first center beam is an inclined surface, the area of the upper surface of the first elastic portion that is not an inclined surface and the inclined surface are connected by a curved surface.

5. The shaft structure according to claim 4, characterized in that A curvature radius of a projection of the curved surface on a reference surface is greater than or equal to 0.3 mm, and the reference surface is perpendicular to the first direction.

6. The shaft structure according to claim 2 or 3, characterized in that A vertical distance from an edge of the arc surface or the inclined surface of the first elastic portion close to the first center beam to the lower surface is greater than or equal to 0.4 mm.

7. The shaft structure according to any one of claims 1-6, characterized in that, On both sides of the first elastic part along the second direction, there are enclosing parts arranged.

8. The shaft structure according to any one of claims 1-7, characterized in that, The compression part includes a bearing plate. Along the third direction, the bearing plate includes a first surface, on which there are convex columns. A rotating ring is sleeved on the convex columns and can rotate relative to the convex columns. The third direction is different from both the first direction and the second direction. When the constraint part slides along the second direction on the door panel, the two rotating rings in the two compression parts move on the two inclined surfaces respectively.

9. The shaft structure according to claim 8, wherein Along the third direction, the bearing plate further includes a second surface, which is opposite to the first surface. There are also convex columns on the second surface. A sliding groove adapted to the convex columns on the second surface is arranged on the door panel, so that the compression part is slidably connected with the door panel. A retaining wall is arranged at the end of the first surface. Along the second direction, the retaining walls of the two compression parts are opposite to each other. The first elastic part is located between the two opposite retaining walls.

10. The shaft structure according to any one of claims 1-9, characterized in that, The constraint part includes a swing arm base. The swing arm base is a structure formed by the opposite ends of a flat base protruding in the third direction along the first direction, and a first groove is formed between the two protrusions. The third direction is different from both the first direction and the second direction. The constraint part further includes a constraint swing arm and a convex platform. Along the second direction, the constraint swing arm and the convex platform are fixed on the opposite two side walls of the swing arm base. The constraint swing arm is rotatably connected with the first middle beam, so that the constraint part is rotatably connected with the first middle beam. The number of the convex platforms can be two. Along the first direction, the two convex platforms are located at the opposite ends of one side wall of the swing arm base. The convex platform includes a shielding sub - part extending along the first direction and a surrounding sub - part extending along the third direction. One end of the shielding sub - part is connected with one end of the surrounding sub - part to form a clamping groove. The shielding sub - part is located at the position where there is no protrusion on the side wall, and the surrounding sub - part is located on the protruding side wall. The surrounding sub - parts of the two convex platforms are opposite to each other, and the openings of the two clamping grooves are opposite to each other. Both of the two clamping grooves communicate with the first groove to form the receiving cavity.

11. The shaft structure according to claim 10, wherein, The surrounding sub - part includes an inner surface and an outer surface along the first direction, and further includes an outer side wall and an inner side wall that connect the inner surface and the outer surface and are opposite to each other along the second direction. The inner side wall is connected with the swing arm base, and the connection part of the outer side wall and the inner surface is the inclined surface.

12. The shaft structure according to claim 10, characterized in that, The constraint part further includes two first sliders. Along the first direction, the two first sliders are located on the opposite two side walls of the swing arm base. Connection sliding grooves adapted to the two first sliders are opened on the door panel, so that the constraint part is slidably connected with the door panel.

13. The shaft structure according to claim 10, wherein At least one first threaded hole is formed by partial depression at the position on the side wall of the swing arm base where no convex platform is provided. The damping mechanism further includes a first locking portion; along the second direction, a partial area at one end of the first locking portion protrudes and bends to form a first locking sub-portion, a fixing hole is formed in the first locking sub-portion, and the fixing hole in the first locking sub-portion is opposite to the first threaded hole; a screw passes through the fixing hole in the first locking sub-portion and is inserted into the first threaded hole to enable fixed connection between the first locking portion and the restraining portion.

14. The shaft structure according to claim 13, wherein, The restraining portion further includes two second sliders; along the first direction, the two second sliders are located on two opposite side walls of the swing arm base. Along the first direction, two opposite end portions of the first locking portion are bent, and a locking chute is formed between the bent portion and the unbent portion; the two second sliders are respectively located in the two locking chutes.

15. The shaft structure according to any one of claims 1-14, characterized in that, The rotating shaft structure includes at least two rotating shaft members; the rotating shaft structure further includes at least one connecting member; along the first direction, at least one connecting member is provided between adjacent two rotating shaft members, and the connecting member is fixedly connected to the rotating shaft member.

16. The shaft structure according to claim 15, characterized in that, The connecting member includes a second middle beam and a supporting mechanism; the supporting mechanism is rotatably connected to the second middle beam.

17. The shaft structure according to claim 16, wherein The rotation center when the supporting mechanism rotates relative to the second middle beam coincides with the rotation center when the restraining portion rotates relative to the first middle beam.

18. The shaft structure according to claim 16 or 17, characterized in that, The supporting mechanism includes a supporting portion; the supporting portion includes a supporting base. Along the second direction, the supporting base is provided with a second threaded hole penetrating through two side walls; a screw is locked in the second threaded hole. A second elastic member and a sphere are arranged in the second threaded hole, and the second elastic member is located between the screw and the sphere; a pit is formed on the second middle beam; when the sphere contacts the second middle beam, the second elastic member is compressed until a partial area of the sphere is located in the pit.

19. The shaft structure according to claim 18, wherein, The supporting mechanism further includes a second locking portion. Along the third direction, the second locking portion is located on one side of the supporting base, and along the second direction, a partial area at one end of the second locking portion protrudes and bends to form a second locking sub-portion, a fixing hole is formed in the second locking sub-portion, and the fixing hole of the second locking sub-portion is opposite to the second threaded hole; the screw passes through the fixing hole of the second locking sub-portion and is inserted into the second threaded hole to enable fixed connection between the second locking portion and the supporting portion.

20. The shaft structure according to claim 18, wherein, The supporting mechanism further includes a swing arm slideway disassembly part, and the swing arm slideway disassembly part is slidably connected to the supporting base. The swing arm slideway disassembly part is fixedly connected to the first body and the second body of the foldable electronic device.

21. The shaft structure according to claim 20, wherein The supporting portion further includes a third slider. A connection chute adapted to the supporting base is formed on the swing arm slideway disassembly part, and a groove adapted to the third slider is formed by partial depression of the side wall of the connection chute of the swing arm slideway disassembly part, so that the swing arm slideway disassembly part is slidably connected to the supporting base. At least one fixing hole is formed in the area of the swing arm slideway disassembly part where the connection chute is not formed.

22. A foldable electronic device, characterized in that, It includes the rotating shaft structure according to any one of claims 1-21.

23. The foldable electronic device according to claim 22, wherein, The foldable electronic device further includes a first body, a second body and a flexible display screen. The rotating shaft structure is fixedly connected to the first body and the second body through the door panel; The flexible display screen is located on one side of the first body, the second body and the rotating shaft structure, and the flexible display screen is supported by the first body, the second body and the rotating shaft structure.

24. The foldable electronic device according to claim 22 or 23, characterized in that The foldable electronic device is an outward foldable electronic device.

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