Rotating shaft mechanism and foldable electronic equipment

Abstract

The embodiment of the invention provides a rotating shaft mechanism and foldable electronic equipment, the rotating shaft mechanism comprises a base, swing arms, a shaft cover and a first buffer structure, the base is provided with a first surface and a second surface which are oppositely arranged in the thickness direction of the base, the swing arms are arranged on the two sides of the axis direction of the base, and the first buffer structure is arranged on the second surface of the base. The swing arm is rotatably connected with the base so that the swing arm can be switched between an unfolded state and a folded state relative to the base, the shaft cover is arranged on one side of the second surface of the base, and the first buffering structure is arranged between the base and the shaft cover and used for buffering stress from the shaft cover. According to the rotating shaft mechanism and the foldable electronic equipment provided by the embodiment of the invention, through the buffering effect of the first buffering structure, the force transmitted to the folding screen when the shaft cover side is impacted can be reduced, so that the risk that the folding screen is damaged is reduced.

Description

Technical Field

[0001] This application relates to the field of electronic devices, and more particularly to a pivot mechanism and a foldable electronic device. Background Technology

[0002] With the gradual development of flexible foldable screen technology, foldable electronic devices have emerged, becoming a hot technology due to their larger display area and excellent portability. Folding these devices makes them easy to carry, while unfolding them enables large-screen display functionality.

[0003] Foldable electronic devices generally include a left shell, a right shell, a hinge mechanism, and a foldable screen. The foldable screen covers the left and right shells, which are located on the left and right sides of the hinge mechanism, respectively. Both the left and right shells can rotate relative to the hinge mechanism to fold together or unfold.

[0004] During the use of foldable electronic devices, there is a risk of them being dropped due to improper handling or slipping. Because there are gaps between the components of the hinge mechanism and between the hinge mechanism and the foldable screen, the impact resistance of the foldable screen is reduced. When a foldable electronic device is dropped, its components often suffer varying degrees of damage, especially the curved part of the foldable screen, which usually collides with the hinge mechanism, causing damage or even destruction to the curved part. Summary of the Invention

[0005] This application provides a hinge mechanism and a foldable electronic device. By utilizing the buffering capacity of the first buffer groove and / or the first buffer medium in the hinge mechanism, the force transmitted to the foldable screen of the foldable electronic device when a collision occurs on the hinge cover side can be reduced, thereby reducing the risk of damage to the foldable screen.

[0006] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0007] In a first aspect, embodiments of this application provide a pivot mechanism, which includes: a base, a swing arm, a shaft cover, and a first buffer structure. The base has a first surface and a second surface disposed opposite to each other in the thickness direction of the base. The swing arm is disposed on both sides in the axial direction of the base and is rotatably connected to the base so that the swing arm can switch between an unfolded state and a folded state relative to the base. The shaft cover is disposed on one side of the second surface of the base. The first buffer structure is disposed between the base and the shaft cover and is used to buffer stress from the shaft cover.

[0008] The hinge mechanism provided in this application embodiment provides a first buffer structure between the base and the hinge cover. The first buffer structure can buffer the stress from the hinge cover to reduce the force transmitted from the hinge cover to the base, thereby reducing the force transmitted to the folding screen and reducing the risk of damage to the folding screen.

[0009] In one possible implementation, the first buffer structure includes a first buffer groove disposed on the second surface of the base, the first buffer groove being formed by the second surface of the base recessed towards the first surface, and / or, the first buffer structure includes a first buffer medium disposed between the base and the shaft cover, the first buffer medium being deformable in the thickness direction of the base.

[0010] A first buffer groove is formed by recessing the base on the side facing the axle cover; or a first buffer medium is provided between the base and the axle cover; or a first buffer groove is formed on the base on the side facing the axle cover while a first buffer medium is provided between the base and the axle cover. Both the first buffer groove and the first buffer medium can buffer the force from the axle cover to the base, thereby reducing the force transmitted from the axle cover to the base, and thus reducing the force transmitted to the folding screen, reducing the risk of damage to the folding screen.

[0011] In one possible implementation, the base includes: a first base and a second base, the first base and the second base being stacked along the thickness direction of the base, and the second base being farther away from the shaft cover than the first base; one end of the swing arm connected to the base is clamped between the first base and the second base; the first buffer structure is disposed between the first base and the shaft cover; the rotating shaft mechanism further includes: a second buffer structure disposed between the second base and the first base, the second buffer structure being used to buffer stress from the first base.

[0012] The second buffer structure can buffer the stress from the first base to reduce the force transmitted from the first base to the second base, thereby reducing the force transmitted to the folding screen and reducing the risk of damage to the folding screen.

[0013] In one possible implementation, the second buffer structure includes a second buffer groove disposed on the surface of the second base facing the first base, the second buffer groove being formed by the recess of the surface of the second base facing the first base in a direction away from the first base, and / or, the second buffer structure includes a second buffer medium disposed between the first base and the second base, the second buffer medium being deformable in the thickness direction of the base.

[0014] By recessing a first buffer groove on the side of the base facing the axle cover, or by providing a first buffer medium between the base and the axle cover, or by simultaneously recessing a first buffer groove on the side of the base facing the axle cover and providing a first buffer medium between the base and the axle cover, a second buffer groove can be recessed along a first direction on the side of the second base facing the first base, and / or a second buffer medium can be provided between the first base and the second base. The second buffer groove and the second buffer medium can reduce the force transmitted from the first base to the second base, thereby reducing the force transmitted from the second base to the folding screen. The second buffer groove and the second buffer medium, together with the design of the side of the base facing the axle cover mentioned above, form a double protection, which can further reduce the risk of damage to the folding screen.

[0015] In one possible implementation, a first buffer medium is provided between the base and the bushing, the stress buffering capacity of the first buffer medium increasing along the thickness direction of the base and from the second surface of the base toward the first surface.

[0016] When the stress buffering capacity of the first buffer medium increases along the thickness direction of the base and from the second surface of the base to the first surface, the deformation of the shaft cover when it is impacted is large and the deformation of the base is small, thereby reducing the force transmitted to the folding screen and reducing the risk of damage to the folding screen.

[0017] In one possible implementation, the first buffer medium includes at least one first elastic layer, on which multiple layers of first stress buffer holes are formed. The multiple layers of first stress buffer holes are arranged along the thickness direction of the base, and the length extension direction of the first stress buffer holes is perpendicular to the thickness direction of the base. In a first cross-section of the first elastic layer, the first stress buffer holes are arranged in a matrix. The first cross-section is along the thickness direction of the base and perpendicular to the extension direction of the first stress buffer holes. The total cross-sectional area of ​​each layer of first stress buffer holes in the first cross-section decreases layer by layer along the direction from the second surface of the base to the first surface.

[0018] In this way, the stress buffering capacity of the first buffer medium can be increased along the thickness direction of the base and from the second surface of the base towards the first surface.

[0019] In one possible implementation, a second buffer medium is provided between the first base and the second base, and the stress buffering capacity of the second buffer medium increases along the thickness direction of the base and from the first base to the second base.

[0020] When the stress buffering capacity of the second buffer medium increases along the thickness direction of the base and from the first base to the second base, the deformation of the shaft cover when it is impacted is large, the deformation of the first base is large, and the deformation of the second base is small. This can reduce the force transmitted to the folding screen and reduce the risk of damage to the folding screen.

[0021] In one possible implementation, the second buffer medium includes at least one second elastic layer, on which multiple layers of second stress buffer holes are formed. The multiple layers of second stress buffer holes are arranged along the thickness direction of the base, and the length extension direction of the second stress buffer holes is perpendicular to the thickness direction of the base. In the second cross-section of the second elastic layer, the second stress buffer holes are arranged in a matrix. The second cross-section is along the thickness direction of the base and perpendicular to the extension direction of the second stress buffer holes. The total cross-sectional area of ​​each layer of second stress buffer holes in the second cross-section decreases layer by layer along the direction from the second surface of the base to the first surface.

[0022] In this way, the stress buffering capacity of the second buffer medium can be increased along the thickness direction of the base and from the first base to the second base.

[0023] In one possible implementation, the stress buffering capacity of the first buffer structure is less than that of the second buffer structure.

[0024] Thus, when the hinge cover is impacted, a gradual stress change occurs between the hinge cover, the first base, and the second base, with the stress decreasing sequentially. If the hinge cover, the first base, and the second base are considered as a whole, the deformation on the hinge cover side of this whole is large, while the deformation on the second base side is small. This reduces the stress transmitted to the folding screen, thus mitigating the risk of screen damage. This embodiment is primarily applicable to scenarios where the hinge cover side experiences a large impact force. By having the hinge mechanism absorb more stress and generate a larger deformation on the side furthest from the folding screen, it ensures that only a small portion or no stress is transmitted to the folding screen on the side of the hinge mechanism closest to the folding screen, reducing the risk of screen damage.

[0025] In one possible implementation, a first buffer medium is provided between the base and the shaft cover, and a second buffer medium is provided between the first base and the second base. The first buffer medium has a plurality of third stress buffer holes, the length extension direction of which is perpendicular to the thickness direction of the base. In a third cross-section of the first buffer medium, the third stress buffer holes are arranged in a matrix, and the cross-sectional areas of the plurality of third stress buffer holes in the third cross-section are the same. The third cross-section is along the thickness direction of the base and perpendicular to the extension direction of the third stress buffer holes. The second buffer medium has a plurality of fourth stress buffer holes, the length extension direction of which is perpendicular to the thickness direction of the base. In a fourth cross-section of the second buffer medium, the fourth stress buffer holes are arranged in a matrix, and the cross-sectional areas of the plurality of fourth stress buffer holes in the fourth cross-section are the same. The fourth cross-section is along the thickness direction of the base and perpendicular to the extension direction of the fourth stress buffer holes. The total cross-sectional area of ​​the plurality of third stress buffer holes in the third cross-section is greater than the total cross-sectional area of ​​the plurality of fourth stress buffer holes in the fourth cross-section.

[0026] In this way, the stress buffering capacity of the first buffer medium can be less than that of the second buffer medium.

[0027] In one possible implementation, the number of the third stress buffer holes is greater than or equal to the number of the fourth stress buffer holes, and the cross-sectional area of ​​each of the third stress buffer holes in the third section is greater than the cross-sectional area of ​​each of the fourth stress buffer holes in the fourth section.

[0028] In this way, it is easy to make the stress buffering capacity of the first buffer medium less than that of the second buffer medium.

[0029] In one possible implementation, the first buffer medium includes M elastic supports, and the second buffer medium includes N elastic supports, where M is less than N. This allows the stress buffering capacity of the first buffer medium to be less than that of the second buffer medium, and the method is simple.

[0030] In one possible implementation, the elastic support includes: an elastic portion and a first receiving portion and a second receiving portion located at both ends of the elastic portion, the first receiving portion abutting against the first base and the second receiving portion abutting against the shaft cover; or, the first receiving portion abutting against the second base and the second receiving portion abutting against the first base, the elastic portion being extendable and retractable in the thickness direction of the base.

[0031] In one possible implementation, the first buffer structure includes: a first buffer groove disposed on a second surface of the base, and a first buffer medium disposed between the base and the shaft cover, wherein the first buffer medium is disposed in the first buffer groove.

[0032] This reduces the overall thickness of the hinge mechanism, which is beneficial for making foldable electronic devices thinner.

[0033] In one possible implementation, the second buffer structure includes: a second buffer groove disposed on the surface of the second base facing the first base, and a second buffer medium disposed between the first base and the second base, the second buffer medium being disposed in the second buffer groove.

[0034] This reduces the overall thickness of the hinge mechanism, which is beneficial for making foldable electronic devices thinner.

[0035] Secondly, embodiments of this application provide a foldable electronic device, including: a foldable screen, at least two main body parts, and at least one hinge mechanism as described above. Two adjacent main body parts are respectively connected to opposite sides of the axial direction of a base of one hinge mechanism, and the two adjacent main body parts are unfolded and folded relative to each other via the hinge mechanism. The foldable screen is attached to one side of the at least two main body parts and the at least one hinge mechanism.

[0036] The foldable electronic device provided in this application embodiment includes a hinge mechanism as described above. By providing a first buffer structure between the base and the cover of the hinge mechanism, the first buffer structure can buffer the stress from the cover to reduce the force transmitted from the cover to the base, thereby reducing the force transmitted to the foldable screen and reducing the risk of damage to the foldable screen. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of a foldable electronic device provided in an embodiment of this application;

[0038] Figure 2 A schematic diagram of the disassembled structure of a foldable electronic device provided in an embodiment of this application;

[0039] Figure 3 This is a schematic diagram of a foldable screen for a foldable electronic device according to an embodiment of this application;

[0040] Figure 4 This is a schematic diagram of the hinge mechanism when a foldable electronic device is fully folded in a related technology.

[0041] Figure 5 A schematic cross-sectional view of a rotating shaft mechanism provided in an embodiment of this application. Figure 1 ;

[0042] Figure 6 A schematic cross-sectional view of a rotating shaft mechanism provided in an embodiment of this application. Figure 2 ;

[0043] Figure 7 A schematic cross-sectional view of a rotating shaft mechanism provided in an embodiment of this application. Figure 3 ;

[0044] Figure 8 A schematic cross-sectional view of a rotating shaft mechanism provided in an embodiment of this application. Figure 4 ;

[0045] Figure 9 A schematic cross-sectional view of a rotating shaft mechanism provided in an embodiment of this application. Figure 5 ;

[0046] Figure 10 A schematic cross-sectional view of a rotating shaft mechanism provided in an embodiment of this application. Figure 6 ;

[0047] Figure 11 A schematic cross-sectional view of a rotating shaft mechanism provided in an embodiment of this application. Figure 7 ;

[0048] Figure 12 A schematic cross-sectional view of a rotating shaft mechanism provided in an embodiment of this application. Figure 8 ;

[0049] Figure 13 A schematic cross-sectional view of a rotating shaft mechanism provided in an embodiment of this application. Figure 9 ;

[0050] Figure 14 A schematic cross-sectional view of a rotating shaft mechanism provided in an embodiment of this application. Figure 10 ;

[0051] Figure 15 This is a schematic diagram of the arrangement of an elastic support provided in one embodiment of this application;

[0052] Figure 16 This is a schematic diagram of the structure of an elastic support pad provided in an embodiment of this application;

[0053] Figure 17 A schematic diagram of an elastic support pad provided in an embodiment of this application applied to a rotating shaft structure;

[0054] Figure 18 A schematic cross-sectional view of a rotating shaft mechanism provided in an embodiment of this application. Figure 10 one;

[0055] Figure 19Schematic diagram of the structure of the first buffer medium and the second buffer medium provided in an embodiment of this application Figure 1 ;

[0056] Figure 20 A schematic cross-sectional view of a rotating shaft mechanism provided in an embodiment of this application. Figure 10 two;

[0057] Figure 21 A schematic cross-sectional view of a rotating shaft mechanism provided in an embodiment of this application. Figure 10 three;

[0058] Figure 22 Schematic diagram of the structure of the first buffer medium and the second buffer medium provided in an embodiment of this application Figure 2 ;

[0059] Figure 23 A schematic cross-sectional view of a rotating shaft mechanism provided in an embodiment of this application. Figure 10 Four.

[0060] Explanation of reference numerals in the attached figures:

[0061] 10-Electronic device; 11-First main body; 12-Second main body; 13-Folding screen; 14-Hinge mechanism; 15-Base;

[0062] 16-Shaft cover;

[0063] 100 - Foldable electronic devices;

[0064] 110 - Foldable screen; 110a - First fixing part; 110b - Second fixing part; 110c - Bending part;

[0065] 120 - First main body section; 130 - Second main body section;

[0066] 200-Rotating shaft mechanism;

[0067] 210 - Base; 210a - First surface; 210b - Second surface; 211 - First base; 212 - Second base;

[0068] 220 - Shaft cover; 230 - First buffer groove; 240 - First buffer medium; 250 - Second buffer groove; 260 - Second buffer medium; 270 - Swing arm; 280 - Slide groove;

[0069] 300 - Flexible support; 310 - Flexible part; 320 - First receiving part; 330 - Second receiving part; 340 - Mounting plate;

[0070] 400 - Elastic support pad; 410 - Elastic protrusion;

[0071] 500 - First stress buffer hole; 600 - Second stress buffer hole; 700 - Third stress buffer hole; 800 - Fourth stress buffer hole. Detailed Implementation

[0072] The terminology used in the implementation section of this application is only for explaining specific embodiments of this application and is not intended to limit this application. The implementation of the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0073] Foldable electronic devices are a type of electronic device that has a hinge mechanism to enable unfolding and folding. Foldable electronic devices can change the state of the hinge mechanism, allowing them to unfold or fold to meet different usage requirements.

[0074] The foldable electronic devices provided in this application can be terminal products such as mobile phones, tablets, televisions, smart wearable products (e.g., smartwatches, smart bracelets), virtual reality (VR) devices, and augmented reality (AR) devices, or professional shooting equipment such as digital cameras, SLR cameras, mirrorless cameras, and action cameras. This application does not limit the specific type of foldable electronic device; any electronic device with a hinge mechanism is acceptable. For ease of understanding, this application uses a foldable mobile phone as an example for illustration.

[0075] Figure 1 This is a schematic diagram of the structure of a foldable electronic device 100 provided in one embodiment of this application. Figure 2 This is a schematic diagram of the disassembled structure of a foldable electronic device 100 provided in an embodiment of this application, with reference to... Figure 1 and Figure 2As shown, the foldable electronic device 100 provided in this application embodiment includes: a foldable screen 110, a first main body 120, a second main body 130, and a hinge mechanism 200. The first main body 120 and the second main body 130 are respectively connected to both sides of the hinge mechanism 200 along its axial direction, and the hinge mechanism 200 enables the first main body 120 and the second main body 130 to be relatively unfolded and folded. The structures of the first main body 120 and the second main body 130 may be the same, not exactly the same, or completely different. It should be noted that, in addition to using one hinge mechanism 200 and two main bodies to form a two-layer folding structure, the foldable electronic device 100 provided in this application embodiment can also use multiple hinge mechanisms 200 and two or more main bodies to form a multi-layer folding structure. This application example uses two main bodies for illustration. When the foldable electronic device 100 includes multiple pivot mechanisms 200 and two or more main bodies, two adjacent main bodies are respectively connected to both sides of the base of a pivot mechanism 200 in the axial direction, and the two adjacent main bodies can be relatively unfolded and folded through the pivot mechanism 200.

[0076] The first main body portion 120 and the second main body portion 130 may house the necessary components of the electronic device. For example, in some embodiments of this application, the foldable electronic device 100 further includes multiple components (not shown in the figures), which can be installed within the first main body portion 120 and the second main body portion 130. These components may include, for example, a motherboard, processor, internal memory, external memory interface, universal serial bus (USB) interface, charging management module, power management module, battery, antenna, communication module, camera, audio module, speaker, receiver, microphone, headphone jack, sensor module, motor, indicator, and subscriber identification module (SIM) card interface, etc. The electronic device may have more or fewer components than described above, may combine two or more components, or may have different component configurations. Each component can be implemented in hardware, software, or a combination of hardware and software, including one or more signal processing and / or application-specific integrated circuits.

[0077] The foldable screen 110 is attached to the surfaces of the first main body 120 and the second main body 130 that are close to each other when folded. For example, as... Figure 1As shown, from the user's perspective, when the foldable electronic device 100 is in a flattened state, the user faces the folding screen 110, which is attached to the upper surfaces of the first main body 120 and the second main body 130. During the relative unfolding and folding of the first main body 120 and the second main body 130, the folding screen 110 is also unfolded and folded simultaneously with the first main body 120 and the second main body 130. When the foldable electronic device 100 includes multiple hinge mechanisms 200 and two or more main bodies, the folding screen 110 is attached to one side of at least two main bodies and at least one hinge mechanism 200.

[0078] The foldable screen 110 includes a display module capable of displaying images and videos. The display module can be a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode (AMOLED), a flexible light-emitting diode (FLED), or a quantum dot light-emitting diode (QLED). Furthermore, in some embodiments of this application, the foldable screen 110 may also include a light-transmitting cover plate, which is disposed on the outside of the display module, i.e., on the side of the display module away from the hinge mechanism 200.

[0079] Figure 3 This is a schematic diagram of the foldable screen 110 of a foldable electronic device 100 provided in an embodiment of this application, with reference to... Figure 3 and combined Figure 2 As shown, the foldable screen 110 includes a curved portion 110c and a first fixing portion 110a and a second fixing portion 110b located on both sides of the curved portion 110c. The first fixing portion 110a is assembled to the first main body portion 120, and the second fixing portion 110b is assembled to the second main body portion 130. The curved portion 110c is provided corresponding to the pivot mechanism 200. During the use of the foldable electronic device 100, the first fixing portion 110a and the second fixing portion 110b generally do not deform, while the curved portion 110c deforms to allow the foldable screen 110 to be relatively unfolded and folded. For example, when the foldable electronic device 100 is fully folded, the cross-section of the curved portion 110c along the arrangement direction of the first fixing portion 110a and the second fixing portion 110b can be deformed into a teardrop shape.

[0080] It should be noted that, Figure 3The dotted line is only used to distinguish the areas of the first fixing part 110a, the second fixing part 110b, and the curved part 110c; it is not an indicator of a structural line. The foldable screen 110 is still a complete screen. Furthermore, the length and width dimensions of the first fixing part 110a and the second fixing part 110b can be the same, not exactly the same, or completely different.

[0081] Because the aforementioned foldable electronic device 100 can switch between an unfolded and folded state, when the user uses the foldable electronic device 100 to browse web pages, access information, watch videos, play games, etc., they can switch from the folded state to the unfolded state to achieve a large-screen display, providing the user with richer information and a better user experience. When the user is finished using the foldable electronic device 100, they can switch from the unfolded state to the folded state. This reduces the size of the foldable electronic device 100, making it easier to store.

[0082] Figure 4 This is a schematic diagram of the hinge mechanism 14 when the foldable electronic device 10 is fully folded in a related technology. (Refer to...) Figure 4 As shown, in related technologies, a foldable electronic device 10 generally includes a first main body 11, a second main body 12, a folding screen 13, and a hinge mechanism 14. The first main body 11 and the second main body 12 are rotatably connected to both sides of the hinge mechanism 14. The left and right sides of the folding screen 13 are connected to the first main body 11 and the second main body 12, respectively. The middle part of the folding screen 13 is correspondingly arranged with the hinge mechanism 14. When the first main body 11 and the second main body 12 are unfolded and folded, the folding screen 13 also unfolds and folds along with the first main body 11 and the second main body 12. The hinge mechanism 14 includes a base 15 and a hinge cover 16. The hinge cover 16 is located on the side of the base 15 away from the folding screen 13. The hinge cover 16 can cover the base 15, which is beneficial to the aesthetic appearance of the foldable electronic device 10. The hinge cover 16 can also protect the base 15 from damage caused by impact.

[0083] However, when the hinge cover 16 is impacted, for example, when the user uses it improperly or slips and causes the foldable electronic device 10 to fall, the foldable electronic device 10 will generally land on the hinge mechanism 14 side first. The hinge cover 16 will be deformed by the force F, and then the hinge cover 16 will impact the base 15, and then the base 15 will impact the foldable screen 13, causing the foldable screen 13 to malfunction or even be damaged.

[0084] Understandable, Figure 4 The example given is that the force F is perpendicular to the shaft cover 16. The force F can be a force in any direction outside the shaft cover 16. All of these forces may cause the folding screen 13 to be impacted, resulting in poor display or even damage to the folding screen.

[0085] To address the aforementioned issues, this application provides a hinge mechanism that, when mounted on a foldable electronic device, can reduce the impact on the foldable screen when the hinge mechanism is subjected to an impact, thereby reducing problems such as display defects and damage to the foldable screen.

[0086] It should be noted that, based on the position of the folding screen when the foldable electronic device is in the folded state, foldable electronic devices can be divided into inward-folding devices and outward-folding devices. When the foldable electronic device is in the folded state, the folding screen is located inside the first main body and the second main body; the foldable electronic device is an inward-folding device. When the foldable electronic device is in the folded state, the folding screen is located outside the first main body and the second main body; the foldable electronic device is an outward-folding device. The hinge mechanism provided in this application embodiment is mainly applicable to inward-folding devices.

[0087] The rotating shaft mechanism provided in this application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0088] refer to Figures 1 to 3 As shown, for ease of understanding, this embodiment of the application establishes a three-dimensional coordinate system based on the foldable electronic device 100, wherein the X-axis direction is the arrangement direction of the first fixing part 110a, the bending part 110c, and the second fixing part 110b, the Y-axis direction is the axial direction of the rotating shaft mechanism 200, and the Z-axis direction is the thickness direction of the foldable electronic device 100. The following figures all use this three-dimensional coordinate system.

[0089] Figure 5 A schematic cross-sectional view of the rotating shaft mechanism 200 provided in an embodiment of this application. Figure 1 ,refer to Figure 5 and combined Figure 2 As shown, Figure 5 Can be regarded as Figure 2The schematic diagram shows a cross-sectional view of the pivot mechanism 200 along the section line AA. The pivot mechanism 200 provided in this embodiment includes a base 210, swing arms 270 disposed on both sides of the base 210 along its axial direction, and a shaft cover 220. The two sides of the base 210 refer to the two sides of the base 210 along the X-axis. Swing arms 270 are rotatably connected to both sides of the base 210 along the X-axis. One swing arm 270 of the base 210 along the X-axis is also connected to the first main body 120, and the other swing arm 270 of the base 210 along the X-axis is also connected to the second main body 130. By rotating the swing arms 270 on both sides of the base 210 relative to the base 210, the first main body 120 and the second main body 130 can be switched between an unfolded state and a folded state, thereby causing the foldable screen 110 to switch between an unfolded state and a folded state, thus enabling the foldable electronic device 100 to switch between these states. Of course, the foldable electronic device 100 can also be unfolded or folded to an intermediate state, which can be any state between the unfolded state and the folded state.

[0090] The base 210 serves as the mounting frame for the pivot mechanism 200, and functional components of the pivot mechanism 200 can be mounted on the base 210. These components include, for example, swing arms rotatably connected to both sides of the base 210, a synchronization mechanism mounted on the base 210, and a damping mechanism mounted on the base 210. The synchronization mechanism ensures synchronized movement of the swing arms on both sides of the base 210, while the damping mechanism provides damping force during rotation of the swing arms, improving the ergonomics of the foldable electronic device 100. These are all referenced in relevant technologies and will not be elaborated upon here.

[0091] The base 210 has a first surface 210a and a second surface 210b disposed opposite to each other in the thickness direction of the base 210. Here, the side of the base 210 facing the foldable screen is defined as the first surface 210a, and the side of the base 210 away from the foldable screen is defined as the second surface 210b. A shaft cover 220 is disposed on one side of the second surface 210b of the base 210. The shaft cover 220 can cover the base 210, improving the aesthetic appearance of the foldable electronic device 100, and can also protect the base 210 from damage.

[0092] A first buffer structure is provided between the base 210 and the axle cover 220 to buffer stress from the axle cover 220. It is understood that by providing the first buffer structure between the base 210 and the axle cover 220, the first buffer structure can buffer the stress from the axle cover 220, thereby reducing the force transmitted from the axle cover 220 to the base 210, and thus reducing the force transmitted to the folding screen, reducing the risk of damage to the folding screen.

[0093] For example, Figure 5 As shown, the first buffer structure includes a first buffer groove 230 disposed on the second surface 210b of the base 210. The first buffer groove 230 is formed by recessing from the second surface 210b of the base 210 towards the first surface 210a. It can be understood that when the side of the axle cover 220 away from the base 210 is impacted, due to the presence of the first buffer groove 230, the deformation of the axle cover 220 will no longer impact the base 210. Alternatively, most of the impact force on the axle cover 220 is absorbed by the deformation generated by the axle cover 220, with only a small portion transmitted to the base 210. In other words, the first buffer groove 230 can buffer the force from the axle cover 220 on the base 210, thereby reducing the force transmitted from the base 210 to the folding screen and reducing the risk of damage to the folding screen.

[0094] Figure 6 A schematic cross-sectional view of the rotating shaft mechanism 200 provided in an embodiment of this application. Figure 2 ,refer to Figure 6 As shown, in the hinge mechanism 200 provided in this embodiment, the first buffer structure may include a first buffer medium 240 disposed between the base 210 and the hinge cover 220. The first buffer medium 240 can absorb energy and deform in the thickness direction of the base 210. When the side of the hinge cover 220 away from the base 210 is impacted, the first buffer medium 240 can buffer the force transmitted from the hinge cover 220, thereby reducing the force transmitted to the base 210 and thus reducing the force transmitted to the folding screen, reducing the risk of damage to the folding screen. In addition, the first buffer medium 240 can also reduce the deformation of the hinge cover 220 when subjected to force, preventing the hinge cover 220 from undergoing large deformation when the foldable electronic device 100 is dropped, and ensuring the external aesthetics of the foldable electronic device 100.

[0095] It should be noted that the embodiments of this application do not limit the specific material and form of the first buffer medium 240. For example, the first buffer medium 240 can be foam, spring, elastic bracket, elastic support pad, etc.

[0096] Of course, in the rotating shaft mechanism 200 provided in this application embodiment, the first buffer groove 230 and the first buffer medium 240 can coexist. Figure 7 A schematic cross-sectional view of the rotating shaft mechanism 200 provided in an embodiment of this application. Figure 3 To keep the map simple, Figure 7 The swing arm has been omitted from the original text, and the same applies to the accompanying figures that do not involve the swing arm. (Reference) Figure 7As shown, in the rotating shaft mechanism 200 provided in this application embodiment, a first buffer groove 230 can be formed on the second surface 210b of the base 210, while a first buffer medium 240 is provided between the base 210 and the shaft cover 220. At this time, the first buffer medium 240 can be disposed in the first buffer groove 230, thereby reducing the thickness of the rotating shaft mechanism 200, i.e., reducing the size of the rotating shaft mechanism 200 in the Z-axis direction. Of course, this application embodiment does not exclude the possibility that the first buffer medium 240 is disposed outside the first buffer groove 230 (e.g., ...). Figure 8 Possible embodiments (shown in the figure).

[0097] It is understood that the hinge mechanism 200 provided in this application embodiment forms a first buffer groove 230 by recessing the base 210 on the side facing the shaft cover 220, or by providing a first buffer medium 240 between the base 210 and the shaft cover 220, or by simultaneously forming a first buffer groove 230 on the side of the base 210 facing the shaft cover 220 and providing a first buffer medium 240 between the base 210 and the shaft cover 220. Both the first buffer groove 230 and the first buffer medium 240 can buffer the force from the shaft cover 220 to the base 210, thereby reducing the force transmitted from the shaft cover 220 to the base 210, and thus reducing the force transmitted to the folding screen, reducing the risk of damage to the folding screen.

[0098] like Figures 5 to 8 As shown in the embodiments of this application, the rotating shaft mechanism 200 is described with the base 210 as a whole, and the swing arm 270 can be rotatably connected to both sides of the base 210 in the form of a fixed rotating shaft. Figure 9 A schematic cross-sectional view of the rotating shaft mechanism 200 provided in an embodiment of this application. Figure 5 ,refer to Figure 9 As shown, in some other embodiments of this application, the base 210 may be composed of multiple parts. For example, the base 210 may include a first base 211 and a second base 212, which are stacked along the thickness direction of the base 210, with the second base 212 being farther from the shaft cover 220 than the first base 211. A groove 280 for rotating the swing arm 270 may be formed between the first base 211 and the second base 212, with one end of the swing arm 270 connected to the base 210 sandwiched between the first base 211 and the second base 212. In this implementation, a second buffer structure may be provided between the first base 211 and the second base 212, which can be used to buffer the stress on the first base 211. Understandably, the second buffer structure can buffer the stress from the first base 211 for the second base 212, thereby reducing the force transmitted from the first base 211 to the second base 212, thus reducing the force transmitted to the folding screen and reducing the risk of damage to the folding screen.

[0099] Figure 10 A schematic cross-sectional view of the rotating shaft mechanism 200 provided in an embodiment of this application. Figure 6 ,refer to Figure 10 As shown, exemplarily, for example, a first buffer groove 230 is formed by recessing the base 210 on the side facing the shaft cover 220; or, a first buffer medium is provided between the base and the shaft cover; or, based on the formation of a first buffer groove on the side of the base facing the shaft cover and the provision of a first buffer medium between the base and the shaft cover, the second buffer structure includes a second buffer groove 250 provided on the surface of the second base 212 facing the first base 211. The second buffer groove 250 is formed by recessing the surface of the second base 212 facing the first base 211 in a direction away from the first base 211. Figure 10 This explanation focuses on the first base 211 having a recessed first buffer groove 230 facing the shaft cover 220, and the second base 212 having a recessed second buffer groove 250 facing the first base 211. It is easy to understand that the second buffer groove 250 reduces the force transmitted from the first base 211 to the second base 212, thereby reducing the force transmitted from the second base 212 to the folding screen. The second buffer groove 250, together with the design of the base 210 facing the shaft cover 220 described above, forms a double protection, further reducing the risk of damage to the folding screen.

[0100] Figure 11 A schematic cross-sectional view of the rotating shaft mechanism 200 provided in an embodiment of this application. Figure 7 ,refer to Figure 11 As shown, a first buffer groove 230 is formed in the recess on the side of the base 210 facing the shaft cover 220; or, a first buffer medium 240 is provided between the base 210 and the shaft cover 220; or, based on the simultaneous formation of the first buffer groove 230 in the recess on the side of the base 210 facing the shaft cover 220 and the provision of the first buffer medium 240 between the base 210 and the shaft cover 220, the second buffer structure may include a second buffer medium 260 disposed between the first base 211 and the second base 212. Figure 11 This explanation focuses on the first buffer groove 230 recessed on the side of the first base 211 facing the shaft cover 220, and the first buffer medium 240 disposed between the first base 211 and the shaft cover 220. An example is provided where a second buffer medium 260 is disposed between the second base 212 and the first base 211. It is easy to understand that the second buffer medium 260 reduces the force transmitted from the first base 211 to the second base 212, thereby reducing the force transmitted from the second base 212 to the folding screen. The second buffer medium 260, together with the design of the side of the base 210 facing the shaft cover 220 described above, forms a double protection, further reducing the risk of damage to the folding screen.

[0101] Figure 12 A schematic cross-sectional view of the rotating shaft mechanism 200 provided in an embodiment of this application. Figure 8 ,refer to Figure 12 As shown, in some embodiments of this application, the second buffer groove 250 and the second buffer medium 260 can coexist. In this case, the second buffer medium 260 can be disposed in the second buffer groove 250, thereby reducing the overall thickness of the rotating shaft mechanism 200, that is, reducing the size of the rotating shaft mechanism 200 on the Z-axis.

[0102] This application does not limit the specific material and form of the second buffer medium 260. For example, the second buffer medium 260 can be foam, spring, elastic bracket 300, elastic support pad 400, etc.

[0103] For example, Figure 13 A schematic cross-sectional view of the rotating shaft mechanism 200 provided in an embodiment of this application. Figure 9 , Figure 14 A schematic cross-sectional view of the rotating shaft mechanism 200 provided in an embodiment of this application. Figure 10 ,refer to Figure 13 and Figure 14 As shown, in some embodiments of this application, both the first buffer medium 240 and the second buffer medium 260 can be elastic supports 300. Each elastic support 300 is a single, separate component. By adjusting the number of elastic supports 300 and their elastic force, the stress buffering capacity of the first buffer medium 240 located between the first base 211 and the shaft cover 220, and the second buffer medium 260 located between the second base 212 and the first base 211, can be precisely controlled, enabling the rotating shaft mechanism 200 to adapt to various working conditions.

[0104] Figure 15 This is a schematic diagram of the arrangement of the elastic support 300 provided in one embodiment of this application, with reference to... Figure 15 As shown, the elastic bracket 300 may include an elastic portion 310 and a first receiving portion 320 and a second receiving portion 330 located at both ends of the elastic portion 310. The first receiving portion 320 and the second receiving portion 330 are respectively used to abut against a target object. For example, the first receiving portion 320 abuts against a first base, and the second receiving portion 330 abuts against a shaft cover; the first receiving portion 320 abuts against a second base, and the second receiving portion 330 abuts against a first base. The elastic portion 310 is elastic and can expand and contract in the thickness direction of the base (i.e., the Z-axis direction) to buffer stress. Mounting plates 340 may also be provided at both ends of the elastic bracket 300 along the Z-axis direction. The elastic bracket 300 is fixed to the mounting plates 340, which facilitates the overall installation of the elastic bracket 300.

[0105] For example, Figure 16This is a schematic diagram of the structure of the elastic support pad 400 provided in one embodiment of this application. Figure 17 This is a schematic diagram of an embodiment of the elastic support pad 400 applied to a rotating shaft structure, with reference to... Figure 16 and Figure 17 As shown, the first buffer medium 240 and the second buffer medium 260 can also be elastic support pads 400. The elastic support pad 400 includes a plurality of elastic protrusions 410 arranged in a matrix. When the elastic support pad 400 is compressed, the elastic protrusions 410 can provide cushioning. The shape of the elastic protrusions 410 is not limited in this embodiment, and includes, but is not limited to, those shown above. Figure 16 As shown in the middle shape.

[0106] In some embodiments of this application, when a first buffer structure is provided between the base 210 and the axle cover 220, and a second buffer structure is provided between the second base 212 and the first base 211, the stress buffering capacity of the first buffer structure can be set to be less than that of the second buffer structure. Thus, when the axle cover 220 is impacted, a gradual stress change occurs between the axle cover 220, the first base 211, and the second base 212, with the stress decreasing sequentially. If the axle cover 220, the first base 211, and the second base 212 are considered as a whole, then the deformation of the axle cover 220 side of this whole is large, while the deformation of the second base 212 side of this whole is small. This reduces the stress transmitted to the folding screen, which helps to reduce the risk of damage to the folding screen. This embodiment is mainly applicable to scenarios where the hinge cover 220 is subjected to a large impact force. The side of the hinge mechanism 200 furthest from the folding screen absorbs more stress and generates a larger deformation, ensuring that only a small portion or no stress is transmitted to the folding screen from the side of the hinge mechanism 200 closest to the folding screen, thus reducing the risk of damage to the folding screen. Of course, in other embodiments of this application, the stress buffering capacity of the first buffer structure can be set to be greater than that of the second buffer structure, or the stress buffering capacity of the first buffer structure can be set to be equal to that of the second buffer structure. These can be specifically set according to the usage scenario of the foldable electronic device 100.

[0107] There are several ways to set the stress buffering capacity of the first buffer structure to be less than that of the second buffer structure. For example, the stress buffering performance of the first buffer medium 240 and the second buffer medium 260 can be tested, such as by the static compression test and dynamic compression test methods commonly used in the industry, and then the stress buffering capacity of the first buffer medium 240 can be set to be less than that of the second buffer medium 260.

[0108] In addition to the methods described above, the following methods can also be used to avoid testing the stress-buffering performance of the first buffer medium 240 and the second buffer medium 260. For example, the first buffer medium 240 can include M elastic supports 300, and the second buffer medium 260 can include N elastic supports 300, where M is less than N. For example, Figure 18 A schematic cross-sectional view of the rotating shaft mechanism 200 provided in an embodiment of this application. Figure 10 1. Reference Figure 18 As shown, in some embodiments of this application, the first buffer medium 240 includes four sets of elastic supports 300 arranged along the X-axis, and the second buffer medium 260 includes six sets of elastic supports 300 arranged along the X-axis. Each set of elastic supports 300 includes an equal number of elastic supports 300, and the elastic supports 300 in each set are arranged along the Y-axis (the direction perpendicular to the plane formed by the Z-axis and the X-axis) of the rotating shaft mechanism 200. In this way, the stress buffering capacity of the first buffer medium 240 is less than that of the second buffer medium 260. When the shaft cover 220 is impacted, a stress gradient trend is formed between the shaft cover 220, the first base 211, and the second base 212. The stress on the shaft cover 220, the first base 211, and the second base 212 decreases sequentially, thereby reducing the stress transmitted to the folding screen and helping to reduce the risk of damage to the folding screen.

[0109] For example, Figure 19 Schematic diagram of the structure of the first buffer medium 240 and the second buffer medium 260 provided in an embodiment of this application Figure 1 ,refer to Figure 19 As shown, the first buffer medium 240 and the second buffer medium 260 can be elastic layers. Here, an elastic layer refers to an elastic material layer with a certain thickness, such as rubber or foam.

[0110] For example, the first buffer medium 240 has a plurality of third stress buffer holes 700 with the same cross-sectional area in the thickness direction of the base 210. The third stress buffer holes 700 penetrate the first buffer medium 240, and all the third stress buffer holes 700 are arranged in a matrix, for example... Figure 19 All the third stress buffer holes 700 are arranged in a 3×20 matrix. The penetration direction of each third stress buffer hole 700 is perpendicular to the thickness direction of the base 210. The penetration direction of the third stress buffer hole 700 can be any direction perpendicular to the thickness direction of the base 210. Figure 19 The following example illustrates the penetration direction of the third stress buffer hole 700 along the Y-axis (the direction perpendicular to the plane formed by the Z-axis and the X-axis).

[0111] The second buffer medium 260 has multiple fourth stress buffer holes 800 with the same cross-sectional area in the thickness direction of the base 210. The fourth stress buffer holes 800 penetrate the second buffer medium 260, and all the fourth stress buffer holes 800 are arranged in a matrix, for example... Figure 19 All the fourth stress buffer holes 800 are arranged in a 3×20 matrix. The penetration direction of each fourth stress buffer hole 800 is perpendicular to the thickness direction of the base 210. The penetration direction of the fourth stress buffer hole 800 can be any direction perpendicular to the thickness direction of the base 210. Figure 19 The following explanation uses the example of the fourth stress buffer hole 800 having its penetration direction along the Y-axis (perpendicular to the plane formed by the Z-axis and X-axis). The total cross-sectional area of ​​all third stress buffer holes 700 along the thickness direction of the base 210 is greater than the total cross-sectional area of ​​all fourth stress buffer holes 800 along the thickness direction of the base. Because the total cross-sectional area of ​​the third stress buffer holes 700 along the thickness direction of the base 210 is greater than the total cross-sectional area of ​​all fourth stress buffer holes 800 along the thickness direction of the base, the overall density of the first buffer medium 240 is lower than that of the second buffer medium 260. Therefore, the stress buffering capacity of the first buffer medium 240 is less than that of the second buffer medium 260, thus achieving the goal of the first buffer medium 240 having a lower stress buffering capacity than the second buffer medium 260. When the shaft cover 220 is impacted, a stress gradient trend is formed between the shaft cover 220, the first base 211 and the second base 212. The stress on the shaft cover 220, the first base 211 and the second base 212 decreases in sequence, thereby reducing the stress transmitted to the folding screen and helping to reduce the risk of damage to the folding screen.

[0112] For example, Figure 20 A schematic cross-sectional view of the rotating shaft mechanism 200 provided in an embodiment of this application. Figure 10 Second, reference Figure 20 As shown, in some embodiments of this application, the number of third stress buffer holes 700 formed on the first buffer medium 240 can be greater than or equal to the number of fourth stress buffer holes 800 formed on the second buffer medium 260. Figure 20 Taking an example where the number of third stress-buffering holes 700 on the first buffer medium 240 is equal to the number of fourth stress-buffering holes 800 on the second buffer medium 260, and where the cross-sectional area of ​​each third stress-buffering hole 700 in the thickness direction of the base 210 is greater than the cross-sectional area of ​​each fourth stress-buffering hole 800 in the thickness direction of the base 210, the stress-buffering capacity of the first buffer medium 240 is less than that of the second buffer medium 260. It should be noted that both the first buffer medium 240 and the second buffer medium 260 may include one or more elastic layers, for example... Figure 20The following example illustrates how the first buffer medium 240 and the second buffer medium 260 each include two elastic layers arranged along the X-axis.

[0113] It is understood that, in some embodiments of this application, the number of third stress buffer holes 700 formed on the first buffer medium 240 may be less than the number of fourth stress buffer holes 800 formed on the second buffer medium 260 (e.g., Figure 21 As shown in the figure, when the stress buffering capacity of the first buffer medium 240 is less than that of the second buffer medium 260, it is sufficient to ensure that the total cross-sectional area of ​​all the third stress buffer holes 700 in the thickness direction of the base 210 is greater than the total cross-sectional area of ​​the fourth stress buffer holes 800 in the thickness direction of the base 210.

[0114] Based on this, in some embodiments of this application, the stress buffering capacity of the first buffer medium 240 and / or the second buffer medium 260 may also be set to increase along the thickness direction of the base 210 and from the second surface 210b of the base 210 towards the first surface 210a. For example, Figure 22 Schematic diagram of the structure of the first buffer medium 240 and the second buffer medium 260 provided in an embodiment of this application Figure 2 , Figure 23 A schematic cross-sectional view of the rotating shaft mechanism 200 provided in an embodiment of this application. Figure 10 IV. References Figure 22 and Figure 23 As shown, Figure 23 The first buffer medium 240 and the second buffer medium 260 can be adopted Figure 22 The structure of either the first buffer medium 240 or the second buffer medium 260 is specified. The embodiments of this application do not limit the opening shape of the first stress buffer hole 500 and the second stress buffer hole 600, including but not limited to... Figure 22 The shapes can be circular, rectangular, or triangular, trapezoidal, or irregular. The first buffer medium 240 may include at least one first elastic layer, and the second buffer medium 260 may include at least one second elastic layer. Figure 23 The following example illustrates the use of a first buffer medium 240 comprising a first elastic layer and a second buffer medium 260 comprising two second elastic layers.

[0115] The first buffer medium 240 has multiple layers of first stress buffer holes 500 penetrating through it. These multiple layers of first stress buffer holes 500 are arranged layer by layer along the thickness direction of the base 210 in a matrix arrangement. The penetration direction of each first stress buffer hole 500 is perpendicular to the thickness direction of the base 210. The total cross-sectional area of ​​each layer of first stress buffer holes 500 in the thickness direction of the base 210 decreases layer by layer along the direction from the second surface 210b to the first surface 210a of the base 210. This can be understood as the density of the first buffer medium 240 being lower closer to the shaft cover 220, resulting in a weaker stress absorption capacity, and the density of the first buffer medium 240 being higher further away from the shaft cover 220, resulting in a stronger stress absorption capacity. This makes the stress buffering capacity of the first buffer medium 240 increase along the direction from the second surface to the first surface of the base.

[0116] Similarly, the second buffer medium 260 is provided with multiple layers of second stress buffer holes 600 penetrating the second buffer medium 260. The multiple layers of second stress buffer holes 600 are arranged layer by layer along the thickness direction of the base 210 in a matrix arrangement. Furthermore, the penetration direction of each second stress buffer hole 600 is perpendicular to the thickness direction of the base 210. The total cross-sectional area of ​​each layer of second stress buffer holes 600 in the thickness direction of the base 210 decreases layer by layer along the direction from the second surface 210b of the base 210 to the first surface 210a. It can be understood that the density of the second buffer medium 260 is lower the closer it is to the first base 211, and the corresponding stress absorption capacity is weaker. The density of the second buffer medium 260 is higher the farther it is from the first base 211, and the corresponding stress absorption capacity is stronger. This makes the stress buffering capacity of the second buffer medium 260 increase along the first direction.

[0117] When the shaft cover 220 is impacted, the stress buffering capacity of the first buffer medium 240 increases along the direction from the second surface 210b of the base 210 towards the first surface 210a. This results in a larger deformation of the shaft cover 220 and a smaller deformation of the first base 211, thereby reducing the force transmitted to the folding screen and minimizing the risk of damage. Similarly, when the shaft cover 220 is impacted, the stress buffering capacity of the second buffer medium 260 increases along the direction from the second surface 210b of the base 210 towards the first surface 210a. This results in a larger deformation of the first base 211 and a smaller deformation of the second base 212, further reducing the force transmitted to the folding screen and minimizing the risk of damage.

[0118] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design solutions. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0119] In the description of the embodiments of this application, the term "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of a single item or a plurality of items. For example, at least one of a, b, c can represent a, b, c, a and b, a and c, b and c, a and b and c, where a, b, and c can be a single item or a plurality of items.

[0120] In the description of embodiments of this application, "parallel," "perpendicular," "equal," and "coplanar" include the described situation and situations similar to the described situation, the range of which is within an acceptable deviation range, wherein the acceptable deviation range is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximately parallelism, wherein the acceptable deviation range for approximately parallelism may be, for example, within ±10° or ±5°. "Perpendicular" includes absolute perpendicularity and approximately perpendicularity, wherein the acceptable deviation range for approximately perpendicularity may be, for example, within ±10° or ±5°; "equal" includes absolute equality and approximately equality, wherein the acceptable deviation range for approximately equality may be, for example, the difference between the two equals being less than or equal to 5% of either one. For example, an angle of 180° between two components includes both absolute 180° and approximate 180°, where an acceptable deviation range for approximate 180° could be, for example, within ±10° or ±5°; similarly, an angle of 0° between two components includes both absolute 0° and approximate 0°, where an acceptable deviation range for approximate 0° could be, for example, within ±10° or ±5°. Similarly, an angle of 90° between two components includes both absolute 90° and approximate 90°, where an acceptable deviation range for approximate 90° could be, for example, within ±10° or ±5°.

[0121] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one" does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0122] The directional terms used in the embodiments of this application, such as "inner" and "outer," are merely for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or a specific orientation structure and operation. Therefore, they should not be construed as limitations on the embodiments of this application. Furthermore, unless otherwise stated in this application, "multiple" in this application refers to two or more.

[0123] In the embodiments of this application, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0124] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0125] The terms "first," "second," "third," "fourth," etc. (if present) in the claims, description, and drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0126] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0127] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them; although the embodiments of this application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A rotation shaft mechanism characterized by comprising: The hinge mechanism comprises: a base having a first surface and a second surface arranged opposite to each other in a thickness direction of the base; a swing arm arranged on both sides of the base in an axial direction of the base, the swing arm being rotatably connected to the base so that the swing arm can be switched between an unfolded state and a folded state relative to the base; a shaft cover arranged on one side of the second surface of the base; a first buffer structure arranged between the base and the shaft cover, the first buffer structure being used for buffering stress from the shaft cover.

2. The hinge mechanism according to claim 1, wherein the first buffer structure comprises a first buffer groove arranged on the second surface of the base, the first buffer groove being formed by recessing the second surface of the base towards the first surface; and / or the first buffer structure comprises a first buffer medium arranged between the base and the shaft cover, the first buffer medium being deformable in the thickness direction of the base.

3. The rotation axis mechanism according to claim 2, wherein the base comprises a first base and a second base, the first base and the second base being arranged in a stacked manner in the thickness direction of the base, and the second base being farther away from the shaft cover than the first base; and the first buffer structure is arranged between the first base and the shaft cover. The hinge mechanism further comprises a second buffer structure arranged between the second base and the first base, the second buffer structure being used for buffering stress from the first base.

4. The hinge mechanism according to claim 3, wherein the second buffer structure comprises a second buffer groove arranged on a surface of the second base facing the first base, the second buffer groove being formed by recessing the surface of the second base facing the first base away from the first base; and / or the second buffer structure comprises a second buffer medium arranged between the first base and the second base, the second buffer medium being deformable in the thickness direction of the base.

5. A pivot mechanism according to any one of claims 2 to 4, wherein The first buffer medium is arranged between the base and the shaft cover, and the stress buffering capacity of the first buffer medium increases in the thickness direction of the base and from the second surface of the base towards the first surface.

6. The rotation shaft mechanism according to claim 5, wherein The first buffer medium comprises at least one first elastic layer, and a plurality of first stress buffering holes penetrating through the first elastic layer are arranged on the first elastic layer, the plurality of first stress buffering holes being arranged in the thickness direction of the base, and the length extension direction of the first stress buffering holes being perpendicular to the thickness direction of the base. In a first cross section of the first elastic layer, the first stress buffering holes are arranged in a matrix; the first cross section is in the thickness direction of the base and perpendicular to the length extension direction of the first stress buffering holes. In the first cross section, the total cross-sectional area of each layer of the first stress buffering holes decreases layer by layer from the second surface of the base towards the first surface.

7. The rotation shaft mechanism according to claim 4, wherein The second buffer medium is arranged between the first base and the second base, and the stress buffering capacity of the second buffer medium increases along the thickness direction of the base and from the first base to the second base.

8. The rotation shaft mechanism according to claim 7, wherein The second buffer medium comprises at least one second elastic layer, and a plurality of second stress buffering holes are arranged in the second elastic layer and extend through the second elastic layer. The plurality of second stress buffering holes are arranged along the thickness direction of the base, and the length extension direction of the second stress buffering holes is perpendicular to the thickness direction of the base. In a second cross section of the second elastic layer, the second stress buffering holes are arranged in a matrix. The second cross section is along the thickness direction of the base and perpendicular to the extension direction of the second stress buffering holes. In the second cross section, the total cross-sectional area of each layer of the second stress buffering holes decreases layer by layer from the second surface to the first surface of the base.

9. The pivot mechanism according to claim 3 or 4, wherein The stress buffering capacity of the first buffer structure is less than that of the second buffer structure.

10. The pivot mechanism of claim 9, wherein, The first buffer medium is arranged between the base and the shaft cover, and the second buffer medium is arranged between the first base and the second base. A plurality of third stress buffering holes are arranged in the first buffer medium, and the length extension direction of the third stress buffering holes is perpendicular to the thickness direction of the base. In a third cross section of the first buffer medium, the third stress buffering holes are arranged in a matrix. The cross-sectional areas of the plurality of third stress buffering holes in the third cross section are the same, and the third cross section is along the thickness direction of the base and perpendicular to the extension direction of the third stress buffering holes. A plurality of fourth stress buffering holes are arranged in the second buffer medium, and the length extension direction of the fourth stress buffering holes is perpendicular to the thickness direction of the base. In a fourth cross section of the second buffer medium, the fourth stress buffering holes are arranged in a matrix. The cross-sectional areas of the plurality of fourth stress buffering holes in the fourth cross section are the same, and the fourth cross section is along the thickness direction of the base and perpendicular to the extension direction of the fourth stress buffering holes. The total cross-sectional area of the plurality of third stress buffering holes in the third cross section is greater than the total cross-sectional area of the plurality of fourth stress buffering holes in the fourth cross section.

11. The rotation shaft mechanism according to claim 10, wherein The number of the third stress buffering holes is greater than or equal to the number of the fourth stress buffering holes, and the cross-sectional area of each third stress buffering hole in the third cross section is greater than the cross-sectional area of each fourth stress buffering hole in the fourth cross section.

12. The rotation shaft mechanism according to claim 9, wherein The first buffer medium comprises M elastic supports, and the second buffer medium comprises N elastic supports, where M is less than N.

13. The rotation mechanism according to claim 12, wherein The elastic support comprises an elastic part and first and second receiving parts located at two ends of the elastic part, respectively. The first receiving part abuts against the first base, and the second receiving part abuts against the shaft cover. Alternatively, the first receiving part abuts against the second base, and the second receiving part abuts against the first base. The elastic part can be stretched and contracted along the thickness direction of the base.

14. The rotation mechanism according to claim 2, wherein The first buffering structure comprises a first buffering groove arranged on the second surface of the base, and a first buffering medium arranged between the base and the shaft cover and arranged in the first buffering groove.

15. The rotation mechanism according to claim 4, wherein The second buffering structure comprises a second buffering groove arranged on the surface of the second base facing the first base, and a second buffering medium arranged between the first base and the second base and arranged in the second buffering groove.

16. A foldable electronic device, characterized by The application further discloses a folding screen comprising: a folding screen, at least two main body parts, and at least one rotation shaft mechanism according to any one of claims 1-15; two adjacent main body parts are respectively connected on two sides of the axis direction of the base of the rotation shaft mechanism, and the two adjacent main body parts are relatively unfolded and folded through the rotation shaft mechanism; the folding screen is attached to one side of the at least two main body parts and the at least one rotation shaft mechanism.

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