Rotating mechanism and foldable electronic device

Abstract

This application provides a hinge mechanism and a foldable electronic device, relating to the field of electronic product technology. The hinge mechanism, by designing the support assembly to include a first support plate, a second support plate, a third support plate, and a fourth support plate arranged in parallel, shortens the overall width of the hinge mechanism, increasing the battery installation space in the housing assembly and improving the battery life of the foldable electronic device. Furthermore, by incorporating a motion module, a synchronization module, and a damping module connected to the support assembly, the movement of the hinge mechanism is achieved. Specifically, the synchronization module utilizes a first synchronization component to achieve synchronous linkage of the movements of the first, second, and third support plates, and a second synchronization component to achieve synchronous linkage of the movements of the second, third, and fourth support plates. The damping module utilizes a first damping component and a second damping component to provide damping force in the areas where the second and third support plates are located, respectively.

Description

Technical Field

[0001] This application relates to the field of electronic product technology, and in particular to a pivot mechanism and a foldable electronic device. Background Technology

[0002] Foldable screens, with their bendable nature, allow electronic devices to switch between unfolded and folded states. These devices offer larger display areas and are easy to carry, making them increasingly popular with consumers.

[0003] The hinge mechanism, as a core component of electronic devices, is used to achieve relative rotation between the two main parts of the device, thereby enabling the unfolding or folding of the foldable screen. Currently, most hinge mechanisms employ an odd-numbered support plate architecture, including a main support plate and motion support plate assemblies movably connected to both sides of the main support plate. To ensure the uniqueness of the hinge mechanism's movement trajectory and operational feel, motion components, synchronization components, and damping mechanisms are connected between the main support plate and the motion support plates.

[0004] However, existing hinge mechanisms have a large number of components and a wide overall width, which encroaches on the battery space of the device and reduces the battery life of electronic devices. Summary of the Invention

[0005] This application provides a hinge mechanism and a foldable electronic device. The hinge mechanism has fewer components and a smaller overall width, which helps to increase the battery space of the whole device and improve the battery life of the foldable electronic device.

[0006] One aspect of this application provides a hinge mechanism for use in foldable electronic devices. The hinge mechanism includes: a support assembly comprising a first support plate, a second support plate, a third support plate, and a fourth support plate arranged in parallel; a motion module movably connected to the support assembly; at least one synchronization module comprising a first synchronization component and a second synchronization component, the first synchronization component being connected to the first support plate, the second support plate, and the third support plate, and the second synchronization component being connected to the second support plate, the third support plate, and the fourth support plate; and at least one damping module comprising a first damping component and a second damping component, the first damping component being connected to the first support plate and the second support plate, and the second damping component being connected to the third support plate and the fourth support plate.

[0007] The hinge mechanism provided in this application reduces the number of support plates by designing the support assembly to include a first support plate, a second support plate, a third support plate, and a fourth support plate arranged in parallel. This four-support-plate structure reduces the overall width of the hinge mechanism, providing more space for the housing assembly of the foldable electronic device and increasing the battery installation space within the housing assembly, thus improving the battery life of the foldable electronic device. Furthermore, by connecting a motion module, a synchronization module, and a damping module to the support assembly, the movement of the hinge mechanism is achieved, ensuring the stability, uniqueness, and accuracy of the movement trajectory. Specifically, the synchronization module uses a first synchronization component and a second synchronization component. The first synchronization component enables synchronized movement of the first, second, and third support plates, while the second synchronization component enables synchronized movement of the second, third, and fourth support plates. The damping module uses a first damping component and a second damping component to provide damping force in the areas where the second and third support plates are located, respectively. This design reduces the number of components in the pivot mechanism, lowers its manufacturing cost, and facilitates its spatial layout.

[0008] In one possible implementation, there are multiple synchronization modules, and each synchronization module is evenly spaced along the length of the support component.

[0009] By arranging the synchronization modules evenly spaced along the length of the support component, each first synchronization component and each second synchronization component can evenly distribute the force to each region along the length of the support component. Furthermore, the left and right parts of the support component are subjected to balanced forces, resulting in good overall balance and high reliability of the support component.

[0010] In one possible implementation, the synchronous modules are arranged symmetrically in pairs with the centerline of the support component along its length as the axis of symmetry.

[0011] With the centerline along the length of the supporting component as the axis of symmetry, the rotating shaft mechanism achieves better structural symmetry by symmetrically arranging each synchronization module in pairs. The upper and lower parts of the rotating shaft mechanism are subjected to balanced forces, resulting in good overall balance, high reliability, and long service life.

[0012] In one possible implementation, both the first synchronization component and the second synchronization component include: a first synchronization element, including a first synchronization gear and a first synchronization swing arm connected together; and a second synchronization element, including a second synchronization gear and a second synchronization swing arm connected together; wherein, in the first synchronization component, the first synchronization gear and the second synchronization gear mesh with a second support plate, the first synchronization swing arm slides along the first support plate, and the second synchronization swing arm slides along a third support plate; and in the second synchronization component, the first synchronization gear and the second synchronization gear mesh with a third support plate, the first synchronization swing arm slides along the second support plate, and the second synchronization swing arm slides along a fourth support plate.

[0013] By setting a first synchronizing element and a second synchronizing element, the first synchronizing gear of the first synchronizing element and the second synchronizing gear of the second synchronizing element are of the same type and mesh with each other on the same support plate. The first synchronizing arm of the first synchronizing element and the second synchronizing arm of the second synchronizing element slide along the support plates on both sides respectively to achieve synchronous linkage of three adjacent support plates.

[0014] In one possible implementation, both the first synchronization component and the second synchronization component further include: a fixing plate disposed at both ends of the first synchronization gear and the second synchronization gear.

[0015] In one possible implementation, both the first damping assembly and the second damping assembly include: a guide post; a damping swing arm sleeved on the guide post and rotating about the guide post; an elastic element and at least one drive sleeve, both the elastic element and the drive sleeve being sleeved on the guide post; the drive sleeve and the damping swing arm have a mutually cooperating concave-convex structure, and the drive sleeve moves along the axial direction of the guide post; wherein, in the first damping assembly, the guide post is fixed to the second support plate, the damping swing arm rotates relative to the second support plate, and the damping swing arm slides along the first support plate; in the second damping assembly, the guide post is fixed to the third support plate, the damping swing arm rotates relative to the third support plate, and the damping swing arm slides along the fourth support plate.

[0016] In the first damping assembly (or the second damping assembly), a guide post is fixed to the second support plate (or the third support plate). One end of the damping swing arm is sleeved on the guide post, and the other end of the damping swing arm is slidably connected to the first support plate (or the fourth support plate). An elastic element and a drive sleeve are sleeved on the guide post, confining the elastic element and the drive sleeve between the two ends of the damping swing arm. By abutting the end of the damping swing arm with the drive sleeve and providing a mutually cooperating concave-convex structure, during the movement of the first support plate (or the fourth support plate) relative to the second support plate (or the third support plate), the damping swing arm rotates around the guide post. Under the action of the concave-convex structure, the drive sleeve moves axially along the guide post and compresses the elastic element. The elastic element generates elastic force to provide damping force for the rotating shaft mechanism.

[0017] In one possible implementation, the damping swing arm includes: a main body extending along the length of a support assembly; stop sleeves connected to both ends of the main body along its length and located on one side of the main body along its width; guide posts passing through the stop sleeves at both ends, a drive sleeve abutting against the stop sleeves, and the drive sleeve and the stop sleeves having mutually cooperating concave-convex structures; and at least one sliding plate connected to the other side of the main body along its width; wherein, in the first damping assembly, the stop sleeves are located on a second support plate, and the sliding plate slides along the first support plate; in the second damping assembly, the stop sleeves are located on a third support plate, and the sliding plate slides along a fourth support plate.

[0018] The damping swing arm is connected to stop sleeves at both ends by a main body, which also serves as the connecting base for the sliding plate. The damping swing arm is fitted onto the guide post by the stop sleeves at both ends of the main body and slides along the corresponding support plate via the sliding plate located on the other side of the main body. The drive sleeve abuts against the stop sleeves of the damping swing arm, and the two have a mutually engaging concave-convex structure. As the stop sleeves of the damping swing arm rotate around the guide post, the concave-convex structure pushes the drive sleeve to move axially along the guide post. The drive sleeve compresses the elastic element, changing its compression, thus providing a varying damping force.

[0019] In one possible implementation, there are two drive sleeves, which abut against the stop sleeves at both ends, and the elastic element is located between the two drive sleeves.

[0020] Two drive sleeves are fitted onto the guide post, and these two drive sleeves abut against the stop sleeves at both ends of the damping swing arm, with the elastic element abutting between the two drive sleeves. During the rotation of the damping swing arm around the guide post, the two stop sleeves drive the two drive sleeves to move synchronously, and the two drive sleeves together compress the elastic element, resulting in greater deformation and a greater damping force.

[0021] In one possible implementation, there are two sliding plate sections, which are respectively connected to the two ends of the main body section along its length.

[0022] By incorporating two sliding plates into the damping swing arm, each plate is connected to one end of the main body along its length. The two sliding plates at both ends of the damping swing arm slide synchronously along their corresponding support plates, allowing the damping swing arm to transmit force simultaneously from both ends, resulting in better stability and higher reliability of its movement.

[0023] In one possible implementation, the outer wall surface of the guide post is provided with at least one first guide portion, which makes the arc surface of the outer wall of the guide post discontinuous; the inner wall surface of the drive sleeve is provided with at least one second guide portion, and the first guide portion and the second guide portion correspond to and match each other.

[0024] A first guide portion is provided on the outer wall surface of the guide post. This first guide portion is a surface discontinuous with other areas of the outer wall surface of the guide post, forming a guide surface. Correspondingly, a second guide portion is provided on the inner wall surface of the drive sleeve, so that the second guide portion corresponds to and matches the first guide portion. In this way, the first and second guide portions cooperate to limit the circumferential position of the drive sleeve relative to the guide post, preventing the drive sleeve from rotating around the guide post. Simultaneously, the drive sleeve can slide along the axial direction of the guide post.

[0025] In one possible implementation, the first guide portion is a plane.

[0026] In one possible implementation, the outer wall of the guide post is provided with two first guide portions, which are arranged opposite to each other and parallel to each other.

[0027] By setting two opposing and parallel first guide parts on the outer wall of the guide post and two opposing and parallel second guide parts on the inner wall of the drive sleeve, the force between the drive sleeve and the guide post is more balanced, which can improve the structural strength of the guide post and the drive sleeve and extend the service life of the damping module.

[0028] In one possible implementation, the motion module includes: a first motion component, including a first main swing arm and a second main swing arm; the first main swing arm is connected to a second support plate, the second main swing arm is connected to a third support plate, and the first main swing arm is rotatably and slidably connected to the first support plate, the second main swing arm is rotatably and slidably connected to a fourth support plate, and the first main swing arm is rotatably and slidably connected to the second main swing arm.

[0029] A first motion assembly is formed by setting up a first main swing arm and a second main swing arm. The first main swing arm is connected to the second support plate and is rotatably and slidably connected to the first and third support plates on both sides. The second main swing arm is connected to the third support plate and is rotatably and slidably connected to the second and fourth support plates on both sides. This allows the four support plates to be movably connected to form a support assembly, enabling relative rotation and translation of the four support plates and meeting the motion requirements of the support assembly. By directly rotatably and slidably connecting the first and second main swing arms, the space occupied by the first motion assembly can be reduced, which is beneficial for the layout design of the rotating shaft mechanism.

[0030] In one possible implementation, both the first main swing arm and the second main swing arm include a first arc-shaped portion, a connecting plate portion, and a second arc-shaped portion connected in sequence; wherein, in the first main swing arm, the connecting plate portion is connected to the second support plate, and the first arc-shaped portion is rotatably and slidably connected to the first support plate; in the second main swing arm, the connecting plate portion is connected to the third support plate, and the first arc-shaped portion is rotatably and slidably connected to the fourth support plate; the second arc-shaped portion of the first main swing arm is rotatably and slidably connected to the second arc-shaped portion of the second main swing arm.

[0031] In one possible implementation, the motion module further includes: a second motion component, comprising a first auxiliary swing arm and a second auxiliary swing arm, wherein the first auxiliary swing arm is movably connected to a first support plate and a second support plate, and the second auxiliary swing arm is movably connected to a third support plate and a fourth support plate; wherein both the first auxiliary swing arm and the second auxiliary swing arm include a connected flat plate portion and an arc plate portion; in the first auxiliary swing arm, the flat plate portion is slidably connected to the first support plate, and the arc plate portion is rotatably and slidably connected to the second support plate; in the second auxiliary swing arm, the flat plate portion is slidably connected to the fourth support plate, and the arc plate portion is rotatably and slidably connected to the third support plate.

[0032] By setting up a second motion assembly consisting of a first and a second swing arm, the flat plate portion of the first swing arm is slidably connected to the first support plate, and the arc plate portion of the first swing arm is rotatably and slidably connected to the second support plate. The flat plate portion of the second swing arm is slidably connected to the fourth support plate, and the arc plate portion of the second swing arm is rotatably and slidably connected to the third support plate. This can limit the orientation and distance of the first support plate (or the fourth support plate) relative to the second support plate (or the third support plate), ensuring the uniqueness and symmetry of the motion trajectory of the support assembly.

[0033] In one possible implementation, the first and second swing arms are arranged symmetrically.

[0034] By symmetrically arranging the first and second swing arms, the forces transmitted by both to the support assembly are balanced, thus enhancing the force equilibrium of the rotating shaft mechanism. Furthermore, the second motion component occupies less space, which facilitates the layout design of other components on the support assembly.

[0035] In one possible implementation, the pivot mechanism further includes two decorative plates arranged side by side on the side of the support assembly away from the folding screen, and the two decorative plates are respectively connected to the first and second swing arms.

[0036] By arranging two decorative plates side-by-side on the side of the support assembly away from the foldable screen, and connecting these plates to the first and second auxiliary swing arms respectively, the two decorative plates can move synchronously with the movement of the second motion assembly. When the hinge mechanism is in the unfolded state, the two support plates are coplanar and close to each other. At this time, the decorative plates conceal the support assembly, enhancing the appearance of the foldable electronic device. When the hinge mechanism is in the folded state, the two support plates are folded relative to each other with their ends moving away from each other to avoid interfering with the support assembly.

[0037] In one possible implementation, when the foldable electronic device is in a folded state, the foldable screen is surrounded by the hinge mechanism.

[0038] When the hinge mechanism is in the folded state, the folding screen is set on the outside of the hinge mechanism. The hinge mechanism is used in outward-folding electronic devices.

[0039] In one possible implementation, when the pivot mechanism is in the unfolded state, from the first side of the support component to the second side of the support component, the gap between the first support plate and the second support plate, the gap between the second support plate and the third support plate, and the gap between the third support plate and the fourth support plate all gradually increase; wherein, the first side of the support component is the side of the support component facing the folding screen, and the second side of the support component is opposite to the first side of the support component.

[0040] Using the hinge mechanism in its unfolded state as a reference, from the side of the support assembly facing the folding screen to the side of the support assembly away from the folding screen, by gradually increasing the gaps between the first and second support plates, the second and third support plates, and the third and fourth support plates, sufficient movement space can be ensured for all four support plates to meet the movement requirements of the support assembly. Furthermore, when the hinge mechanism is in its folded state, the support plates of the support assembly can be placed close together in pairs, ensuring the stability of the hinge mechanism and smoothly supporting the folding screen.

[0041] Another aspect of this application provides a foldable electronic device, including a first housing, a second housing, a foldable screen, and a hinge mechanism as described above; the hinge mechanism is connected between the first housing and the second housing, the foldable screen is attached to the first housing and the second housing, and the foldable screen is supported by the hinge mechanism.

[0042] The foldable electronic device provided in this application includes a first housing, a second housing, a hinge mechanism connecting the first and second housings, and a foldable screen mounted on the first and second housings. The hinge mechanism, by designing a support assembly comprising a first support plate, a second support plate, a third support plate, and a fourth support plate arranged in parallel, forms a four-support-plate architecture, reducing the number of support plates in the hinge mechanism. The overall width of the hinge mechanism is shortened, reserving more space for the housing assembly of the foldable electronic device, increasing the battery installation space within the housing assembly, and improving the battery life of the foldable electronic device. Furthermore, by setting a motion module, a synchronization module, and a damping module connected to the support assembly, the movement of the hinge mechanism is realized, ensuring the stability of the hinge mechanism's movement and the uniqueness and accuracy of its movement trajectory. Specifically, the synchronization module, by setting a first synchronization component and a second synchronization component, uses the first synchronization component to achieve synchronous linkage of the movements of the first, second, and third support plates, and uses the second synchronization component to achieve synchronous linkage of the movements of the second, third, and fourth support plates. The damping module utilizes a first damping component and a second damping component to provide damping force in the areas where the second and third support plates are located, respectively. This arrangement reduces the number of components in the pivot mechanism, lowers its manufacturing cost, and facilitates its spatial layout. Attached Figure Description

[0043] Figure 1 A schematic diagram of the structure of the foldable electronic device provided in the embodiment of this application when it is in the unfolded state;

[0044] Figure 2 for Figure 1 A schematic diagram of the structure of the foldable electronic device in the folded state;

[0045] Figure 3 An exploded view of the foldable electronic device provided in an embodiment of this application;

[0046] Figure 4 A structural diagram from one perspective of the rotating shaft mechanism provided in the embodiment of this application when it is in the unfolded state;

[0047] Figure 5 for Figure 4 A structural diagram from another perspective when the rotating shaft mechanism is in the unfolded state;

[0048] Figure 6 for Figure 4 A structural diagram of the rotating shaft mechanism in the folded state;

[0049] Figure 7 A front view of the rotating shaft mechanism provided in an embodiment of this application;

[0050] Figure 8 for Figure 7 A magnified view of the structure at point A in the middle;

[0051] Figure 9 for Figure 7 A partially exploded view of the rotating shaft mechanism at point A;

[0052] Figure 10 This is a schematic diagram of the structure of the first main swing arm provided in an embodiment of this application;

[0053] Figure 11 This is a schematic diagram of the structure of the second main swing arm provided in an embodiment of this application;

[0054] Figure 12 for Figure 8 Sectional view at point AA;

[0055] Figure 13 for Figure 8 Sectional view at point BB;

[0056] Figure 14 for Figure 7 A magnified view of the structure at point B in the middle;

[0057] Figure 15 This is a schematic diagram of the structure of the synchronization module provided in the embodiments of this application;

[0058] Figure 16 for Figure 7 A magnified view of the structure at point C in the middle;

[0059] Figure 17 This is a schematic diagram of the structure of the damping module provided in the embodiments of this application;

[0060] Figure 18 for Figure 17 The exploded structure diagram of the damping module in the diagram. Detailed Implementation

[0061] The terminology used in the implementation section of this application is for the purpose of explaining specific embodiments of this application only, and is not intended to limit this application.

[0062] This application provides a foldable electronic device, which can be a consumer electronics product. Exemplary examples include, but are not limited to, foldable electronic products such as foldable mobile phones, laptop computers, notebook computers, netbooks, personal digital assistants (PDAs), personal computers, multimedia players, e-book readers, in-vehicle devices, virtual reality (VR) devices, augmented reality (AR) devices, or wearable devices. Wearable devices include, but are not limited to, smart bracelets, smartwatches, smart head-mounted displays, and smart glasses.

[0063] Figure 1 This is a schematic diagram of the structure of the foldable electronic device provided in the embodiment of this application when it is in the unfolded state. Figure 2 for Figure 1 A schematic diagram of the foldable electronic device in its folded state. (Refer to...) Figure 1 and Figure 2 As shown, this embodiment uses a foldable mobile phone as an example of a foldable electronic device for explanation.

[0064] For foldable electronic devices, different usage states can occur in different usage scenarios. Figure 1 The diagram shows a foldable electronic device in its unfolded state, with an unfolding angle α of, for example, 180°. In this state, the foldable electronic device can achieve a large-screen display. Figure 2 The diagram shows a foldable electronic device in a folded state, where it is small in size and easy to carry.

[0065] It should be noted that the angles illustrated in this embodiment are allowed to have slight deviations. For example, Figure 1 The unfolding angle α of the foldable electronic device shown is 180°, meaning that the unfolding angle α can be 180°, or approximately 180°, such as 170°, 175°, 185°, or 190°. The angles illustrated in the following text can be understood in the same way.

[0066] in addition, Figure 1 and Figure 2 The foldable electronic device shown is capable of folding once and includes two parts that can rotate relative to each other. When the two parts rotate to be coplanar, the foldable electronic device is in an unfolded state (e.g., Figure 1 (As shown). When the two parts are rotated to overlap, the foldable electronic device is in a folded state (as shown). Figure 2 (As shown).

[0067] In other embodiments, the foldable electronic device may also be an electronic device that can be folded more than twice. In this case, the foldable electronic device may include multiple parts that are rotatably connected in sequence. Two adjacent parts may be relatively far apart to be unfolded into an unfolded state, and two adjacent parts may also be relatively close to be folded into a folded state.

[0068] Figure 3 This is an exploded structural diagram of a foldable electronic device provided in an embodiment of this application. (Refer to...) Figure 3 As shown, the foldable electronic device includes a foldable screen 10 and a housing assembly 20. One side surface of the foldable screen 10 is used to display image information; this side surface is typically defined as its front, and the opposite side surface is its back. The housing assembly 20 surrounds the periphery and back of the foldable screen 10, providing support, fixation, and protection for the foldable screen 10. The front of the foldable screen 10 is exposed outside the housing assembly 20, allowing users to view the content displayed on the foldable screen 10 or perform input operations on the foldable electronic device.

[0069] The foldable screen 10 may include a first non-bending portion 11, a bendable portion 12, and a second non-bending portion 13 arranged sequentially along a first direction; or, in other words, the bendable portion 12 is located between the first non-bending portion 11 and the second non-bending portion 13 in the first direction. The folding method of the foldable electronic device can be... Figure 1 and Figure 2 The horizontal fold shown in the diagram allows the first direction to be... Figure 3 The X direction is shown in the diagram. Of course, foldable electronic devices can also be folded vertically, and this embodiment does not limit this.

[0070] The foldable screen 10 can be made of a flexible material so that the bendable portion 12 can be bent. For example, the foldable screen 10 can be an organic light-emitting diode (OLED) display.

[0071] The housing assembly 20 supports and secures the foldable screen 10, and drives the foldable screen 10 to switch between a folded state and an unfolded state. (See reference...) Figure 3 As shown, the housing assembly 20 includes a first housing 21, a second housing 22, and a rotating shaft mechanism 23, which connects the first housing 21 and the second housing 22. The first housing 21 and the second housing 22 are rotatably connected by the rotating shaft mechanism 23, thereby enabling relative rotation between the first housing 21 and the second housing 22.

[0072] The first housing 21 supports and fixes the first non-bending portion 11 of the foldable screen 10, and the second housing 22 supports and fixes the second non-bending portion 13 of the foldable screen 10. For example, the first non-bending portion 11 of the foldable screen 10 is attached to the first housing 21 by adhesive, and the second non-bending portion 13 of the foldable screen 10 is attached to the second housing 22 by adhesive. The bendable portion 12 of the foldable screen 10 is provided corresponding to the pivot mechanism 23, and the bendable portion 12 is supported by the pivot mechanism 23.

[0073] During use, the first non-bending portion 11 and the second non-bending portion 13 of the foldable electronic device 10 remain flat, while the bendable portion 12 of the foldable screen 10 can be bent. When the pivot mechanism 23 drives the first housing 21 and the second housing 22 to rotate relative to each other, the first non-bending portion 11 and the second non-bending portion 13 of the foldable screen 10 change their orientation accordingly, and the bendable portion 12 of the foldable screen 10 bends or flattens as the orientation of the first non-bending portion 11 and the second non-bending portion 13 changes.

[0074] The first housing 21 and the second housing 22 can rotate in a direction away from each other until they are coplanar. At this time, the housing assembly 20 is in the unfolded state, and the folding screen 10 is also in the unfolded state as the housing assembly 20 unfolds (e.g., Figure 1 (As shown). The first housing 21 and the second housing 22 can also rotate towards each other until they are stacked opposite each other. At this time, the housing assembly 20 is in a folded state, and the folding screen 10 is in a folded state along with the folding of the housing assembly 20 (as shown). Figure 2 (As shown).

[0075] It should be noted that the foldable electronic device in this embodiment can be an outward-folding electronic device. When the foldable electronic device is in a folded state, the first non-bending portion 11 and the second non-bending portion 13 of the foldable screen 10 are opposite to each other, and the housing assembly 20 is located between the first non-bending portion 11 and the second non-bending portion 13. At this time, the foldable screen 10 is surrounded by the housing assembly 20 and is visible to the user. That is to say, when the outward-folding electronic device is in a folded state, the foldable screen 10 is exposed and can be used to realize the display function.

[0076] Continue to refer to Figure 3When the foldable electronic device is an outward-folding electronic device, the first housing 21 and the second housing 22 in the housing assembly 20 of the foldable electronic device can both include a mid-frame 201 and a back cover 202. The first non-bending portion 11 and the second non-bending portion 13 of the foldable screen 10 can be supported on the front of the corresponding mid-frame 201, and the back cover 202 is connected to the side surface of the mid-frame 201 opposite to the foldable screen 10. In the first housing 21 and the second housing 22, the mid-frame 201 and the back cover 202 together form a receiving cavity, which is used to install some functional devices (not shown in the figure) of the foldable electronic device. For example, the receiving cavity is used to install functional devices such as circuit boards, batteries, camera modules, microphones, and speakers.

[0077] The following description uses the foldable electronic device as an outward-folding electronic device, with the hinge mechanism 23 in the folded state and the foldable screen 10 wrapped around the outside of the hinge mechanism 23 as an example to explain the hinge mechanism 23 in detail.

[0078] In related technologies, the hinge mechanism 23 is mostly an odd-numbered support plate structure. The hinge mechanism 23 typically includes a central main support plate and movable support plate assemblies movably connected to both sides of the main support plate. Taking the hinge mechanism 23 applied to an outward-folding electronic device as an example, the movable support plate assemblies on both sides of the main support plate typically include an outer support plate and an inner support plate. The outer support plate is located on both sides of the hinge mechanism 23, and the inner support plate is movably connected between the main support plate and the outer support plate. That is to say, the hinge mechanism 23 includes a total of five support plates. The hinge mechanism 23 is connected to the first housing 21 and the second housing 22 respectively by the outer support plates located on both sides. By setting the inner support plate between the main support plate and the outer support plate, the hinge mechanism 23 ensures that the bendable part 12 of the foldable screen 10 is supported stably.

[0079] To ensure the uniqueness of the movement trajectory of each support plate, not only are movable components needed to connect each pair of the main support plate, inner support plate, and outer support plate, but a moving component is also needed to directly connect the main support plate and the outer support plate. Furthermore, to ensure the stability (operational feel) of the hinge mechanism 23 during unfolding and folding, a damping mechanism is also provided between the main support plate and the moving support plate assembly to provide damping force for the hinge mechanism 23. For the hinge mechanism 23 used in outward-folding electronic devices, the damping mechanism typically includes two damping components: one damping component provides damping force in the area where the main support plate is located, and the other damping component provides damping force in the area where the outer support plate is located.

[0080] However, in the related technology, the hinge mechanism 23 has a large number of support plates, and the width of the support plates is large in order to ensure the overlap of moving parts and damping mechanisms. Therefore, the hinge mechanism 23 has a large number of components and a large overall width, which encroaches on the space of the first housing 21 (or the second housing 22), resulting in limited space for battery installation in the first housing 21 (or the second housing 22), thus weakening the battery life of the foldable electronic device. Furthermore, due to the large number and width of the support plates, as well as the large number of moving parts and damping mechanisms, the manufacturing cost of the hinge mechanism 23 is high, and it is also unfavorable for the spatial layout of the hinge mechanism 23.

[0081] In view of this, the present application embodiment improves the hinge mechanism 23 by designing the support assembly to include a first support plate, a second support plate, a third support plate, and a fourth support plate arranged in parallel in sequence. The hinge mechanism 23 has a four-support plate structure, reducing the number of support plates in the hinge mechanism 23. The overall width of the hinge mechanism 23 is shortened, reserving more space for the housing assembly 20 of the foldable electronic device, which can increase the battery installation space in the housing assembly 20 and improve the battery life of the foldable electronic device. Furthermore, by setting a motion module, a synchronization module, and a damping module connected to the support assembly, the movement of the hinge mechanism 23 is realized, ensuring the stability of the movement of the hinge mechanism 23 and the uniqueness and accuracy of the movement trajectory. Among them, the synchronization module sets a first synchronization component and a second synchronization component. The first synchronization component realizes the synchronous linkage of the movement of the first support plate, the second support plate, and the third support plate, and the second synchronization component realizes the synchronous linkage of the movement of the second support plate, the third support plate, and the fourth support plate. The damping module provides damping force in the areas where the second and third support plates are located by setting up a first damping component and a second damping component, respectively. This arrangement reduces the number of components in the pivot mechanism 23, lowers the manufacturing cost of the pivot mechanism 23, and facilitates the spatial layout of the pivot mechanism 23.

[0082] Figure 4 This is a structural diagram from one perspective of the rotating shaft mechanism provided in the embodiments of this application when it is in the unfolded state. Figure 5 for Figure 4 A structural diagram from another perspective when the rotating shaft mechanism is in the unfolded state. Figure 6 for Figure 4 The structural diagram of the rotating shaft mechanism in the folded state.

[0083] Reference Figures 4 to 6As shown in any embodiment, the rotating shaft mechanism 23 includes a support assembly 100, which is the main support structure of the rotating shaft mechanism 23. The support assembly 100 includes a first support plate 110, a second support plate 120, a third support plate 130, and a fourth support plate 140. The first support plate 110, second support plate 120, third support plate 130, and fourth support plate 140 can all extend along the length direction of the rotating shaft mechanism 23, and can be arranged side-by-side sequentially along the width direction of the rotating shaft mechanism 23. The first support plate 110, second support plate 120, third support plate 130, and fourth support plate 140 are movably connected to each other, and can move relative to each other.

[0084] Reference Figure 4 or Figure 5 As shown in the figure, the first support plate 110, the second support plate 120, the third support plate 130, and the fourth support plate 140 are coplanar. At this time, the pivot mechanism 23 is in the unfolded state, and the foldable electronic device is also in the unfolded state. (Refer to...) Figure 6 As shown in the figure, the first support plate 110 and the fourth support plate 140 are close to each other and folded relative to each other, while the second support plate 120 and the third support plate 130 are tilted relative to each other. At this time, the pivot mechanism 23 is in a folded state, and the foldable electronic device is also in a folded state.

[0085] The pivot mechanism 23 also includes components connected to the support assembly 100, such as the motion module, synchronization module, and damping module mentioned later. These components are movably connected to the support assembly 100. The motion module enables relative movement (e.g., relative rotation and relative translation) between the first support plate 110, the second support plate 120, the third support plate 130, and the fourth support plate 140, allowing the pivot mechanism 23 to drive relative movement between the first housing 21 and the second housing 22, thus switching the housing assembly 20 between its unfolded and folded states. The synchronization module synchronizes the movement of the first support plate 110, the second support plate 120, the third support plate 130, and the fourth support plate 140, ensuring the symmetry of the movement trajectory of the support assembly 100, so that the first housing 21 and the second housing 22 rotate and translate synchronously. The damping module provides damping force to ensure the stability of the housing assembly 20 in its unfolded, folded, and transitional states, improving the handling feel of the foldable device.

[0086] Figure 4 The upward-facing surface of the support component 100 shown in the figure is used to support the folding screen 10. Figure 5 The viewpoint of the support component 100 in the middle and Figure 4 The perspective of the supporting component 100 in the middle is opposite. Figure 5 The upward-facing surface of the support component 100 shown is opposite to the folding screen 10. For ease of explanation, in this embodiment, the side of the support component 100 facing the folding screen 10 is defined as its first side, and the side of the support component 100 facing away from the folding screen 10 is defined as its second side.

[0087] The first side of the support assembly 100 is mainly used to support the bendable portion 12 of the foldable screen 10, and the portions of the first non-bendable portion 11 and the second non-bendable portion 13 adjacent to the bendable portion 12. The second support plate 120 and the third support plate 130, located in the middle region of the pivot mechanism 23, correspond to the bendable portion 12 of the foldable screen 10. The second support plate 120 and the third support plate 130 are only used to support the bendable portion 12 and are not connected to the bendable portion 12 to avoid affecting its deformation movement. The first support plate 110 and the fourth support plate 140, located on both sides of the pivot mechanism 23, can be connected to the first housing 21 and the second housing 22, respectively. Furthermore, at least a portion of the first support plate 110 is used to support the first non-bendable portion 11 of the foldable screen 10, and the first non-bendable portion 11 can be attached to the first support plate 110. Similarly, at least a portion of the fourth support plate 140 is used to support the second non-bending portion 13 of the folding screen 10, which can be attached to the fourth support plate 140.

[0088] For outward-folding electronic devices, when the foldable electronic device is in the folded state, the foldable screen 10 wraps around the outside of the housing assembly 20, with the first housing 21 and the second housing 22 facing each other and their sides close together. Therefore, a certain clearance space needs to be reserved between the first housing 21 and the second housing 22 to prevent them from interfering with each other when folded. When the foldable electronic device is in the unfolded state, the gap between the first housing 21 and the second housing 22 is relatively large, and at least a portion of the surface of the support assembly 100 facing away from the foldable screen 10 is exposed. For example, the surfaces of the second support plate 120 and the third support plate 130 are completely exposed outside the housing assembly 20, and portions of the surfaces of the first support plate 110 and the fourth support plate 140 are exposed outside the housing assembly 20.

[0089] In this regard, refer to Figure 5 or Figure 6 As shown, the hinge mechanism 23 typically also includes a decorative panel 500, which is disposed on the second side of the support assembly 100. The decorative panel 500 is used to cover the surface of the support assembly 100 facing away from the folding screen 10, so as to prevent the support assembly 100 and the components connected to the support assembly 100 from being exposed when the hinge mechanism 23 is in the unfolded state, thereby improving the appearance of the foldable electronic device.

[0090] The decorative panel 500 can be two, arranged side-by-side on the surface of the support assembly 100. For example, the two decorative panels 500 are symmetrically arranged about the center line of the support assembly 100, corresponding to the second support plate 120 and the third support plate 130 respectively, and each can partially cover the first support plate 110 and the fourth support plate 140 respectively. The decorative panels 500 can be movably connected to the support assembly 100, and the two decorative panels 500 can move relative to each other as the support assembly 100 moves.

[0091] Reference Figure 5 As shown, when the pivot mechanism 23 is in the unfolded state, the two decorative panels 500 unfold along with the support assembly 100, and the two decorative panels 500 can be in a coplanar state. Furthermore, the two decorative panels 500 are close to each other; for example, there is no obvious gap between them. At this time, the decorative panels 500 cover the surface of the support assembly 100, ensuring the aesthetic appearance of the foldable electronic device. (Refer to...) Figure 6 As shown, when the pivot mechanism 23 is in the folded state, the two decorative panels 500 fold relative to each other as the support assembly 100 folds, and the two support plates are in a roughly parallel state. Furthermore, the ends of the two decorative panels 500 near the central region of the support assembly 100 (the region where the second support plate 120 and the third support plate 130 are located) are far apart from each other, with a gap between them to avoid interference between the decorative panels 500 and the support assembly 100.

[0092] Compared to the five-support-plate architecture in related folding electronic devices, this embodiment uses a support assembly 100 composed of a first support plate 110, a second support plate 120, a third support plate 130, and a fourth support plate 140 arranged in parallel, with the hinge mechanism 23 consisting of four support plates. This arrangement reduces the number of support plates in the hinge mechanism 23, resulting in a smaller overall width of the hinge mechanism 23. This allows for more space to be reserved in the housing assembly 20, increasing the battery installation space within the housing assembly 20 and improving the battery life of the foldable electronic device.

[0093] Furthermore, while ensuring the overlap of the motion module 200, synchronization module 300, and damping module 400 on the support assembly 100, the overall number of components in the pivot mechanism 23 is reduced by decreasing the number of support plates in the support assembly 100. This saves on the manufacturing cost of the pivot mechanism 23 and lowers the production cost of foldable electronic devices.

[0094] Continue to refer to Figure 4 or Figure 5As shown, taking the posture of the pivot mechanism 23 in the unfolded state as a reference, from the first side to the second side of the support assembly 100, the gaps between the first support plate 110 and the second support plate 120, the gap between the second support plate 120 and the third support plate 130, and the gap between the third support plate 130 and the fourth support plate 140 all gradually increase. In this way, the first support plate 110, the second support plate 120, the third support plate 130, and the fourth support plate 140 all have sufficient room to move, meeting the movement requirements of the support assembly 100 when the pivot mechanism 23 switches between the unfolded and folded states. Furthermore, referring to... Figure 6 As shown, when the pivot mechanism 23 is in the folded state, the first support plate 110, the second support plate 120, the third support plate 130 and the fourth support plate 140 can be closely abutted in pairs to ensure the stability of the pivot mechanism 23, so that the bendable part 12 of the foldable screen 10 maintains a smooth and rounded surface shape.

[0095] For example, the cross-sectional shape of the second support plate 120 and the third support plate 130 located in the middle of the support assembly 100 may be generally trapezoidal. The first support plate 110 located on one side of the support assembly 100 may extend obliquely toward the side wall of the second support plate 120. Similarly, the fourth support plate 140 located on the other side of the support assembly 100 may extend obliquely toward the side wall of the third support plate 130.

[0096] Figure 7 This is a front view of the rotating shaft mechanism provided in an embodiment of this application. Figure 8 for Figure 7 A magnified view of the structure at point A in the middle. Figure 9 for Figure 7 The exploded view of the rotating shaft mechanism at point A. Figure 10 This is a schematic diagram of the structure of the first main swing arm provided in an embodiment of this application. Figure 11 This is a schematic diagram of the structure of the second main swing arm provided in an embodiment of this application. Figure 12 for Figure 8 Sectional view at point AA. Figure 13 for Figure 8 Sectional view at point BB.

[0097] Reference Figure 7As shown, the components connected to the support assembly 100, such as the motion module 200, the synchronization module 300, and the damping module 400, can be arranged along the length of the support assembly 100. In this way, these components ensure a stable and reliable connection of the support assembly 100 and provide forces at various points along its length to achieve relative movement between the support plates of the support assembly 100. This guarantees the uniqueness and symmetry of the movement trajectory of the support assembly 100, ensures the stability of the rotation mechanism 23, and improves the operational feel of the foldable electronic device.

[0098] Reference Figure 8 and Figure 9 As shown, the motion module 200 connected to the support assembly 100 may include a first motion component 210, which mainly provides the degrees of freedom required for the movement of the support assembly 100. The first motion component 210 may include a first main swing arm 211 and a second main swing arm 212. The first main swing arm 211 is used to movably connect the first support plate 110, the second support plate 120, and the third support plate 130, and the second main swing arm 212 is used to movably connect the second support plate 120, the third support plate 130, and the fourth support plate 140. Through the combined action of the first main swing arm 211 and the second main swing arm 212, the first support plate 110, the second support plate 120, the third support plate 130, and the fourth support plate 140 can be movably connected together to form the support assembly 100.

[0099] The first main swing arm 211 can be connected to the second support plate 120, and the first main swing arm 211 is rotatably and slidably connected to the first support plate 110, and rotatably and slidably connected to the third support plate 130. Thus, under the action of the first main swing arm 211, with the second support plate 120 as a reference, both the first support plate 110 and the third support plate 130 can move relative to the second support plate 120. The first main swing arm 211 can provide a virtual center for the movement of the first support plate 110 and the third support plate 130, allowing the first support plate 110 and the third support plate 130 to rotate and translate relative to the second support plate 120.

[0100] Similarly, the second main swing arm 212 can be connected to the third support plate 130, and the second main swing arm 212 is rotatably and slidably connected to the second support plate 120, and rotatably and slidably connected to the fourth support plate 140. Thus, under the action of the second main swing arm 212, with the third support plate 130 as a reference, both the second support plate 120 and the fourth support plate 140 can move relative to the third support plate 130. The second main swing arm 212 can provide a virtual center for the movement of the second support plate 120 and the fourth support plate 140, allowing them to rotate and translate relative to the third support plate 130.

[0101] Under the action of the first main swing arm 211 and the second main swing arm 212, the first support plate 110 and the third support plate 130 can rotate and slide relative to the second support plate 120, and the second support plate 120 and the fourth support plate 140 can rotate and slide relative to the third support plate 130. In this way, the first support plate 110, the second support plate 120, the third support plate 130 and the fourth support plate 140 can all rotate freely, and the first support plate 110 and the second support plate 120, the second support plate 120 and the third support plate 130, and the third support plate 130 and the fourth support plate 140 can be relatively close to or relatively far apart to meet the movement requirements of the support plate assembly.

[0102] In this configuration, the first main swing arm 211 and the second main swing arm 212 can be directly connected, rotating and sliding together to achieve a relative rotational and sliding motion between the second support plate 120 and the third support plate 130. In this case, the first main swing arm 211 and the second main swing arm 212 can be arranged side-by-side and overlap each other. This results in a smaller space occupied by the first motion component 210 along the length of the rotating shaft mechanism 23, which is beneficial for the layout design of other components on the support component 100. Alternatively, the first main swing arm 211 and the second main swing arm 212 can not be directly connected. Instead, they can be staggered, with the first main swing arm 211 directly rotating and slidingly connected to the third support plate 130, and the second main swing arm 212 directly rotating and slidingly connected to the second support plate 120, to achieve a relative rotational and sliding motion between the second support plate 120 and the third support plate 130.

[0103] The following explanation uses the example of the first main swing arm 211 and the second main swing arm 212 being arranged side by side and overlapping, with the two rotating directly and slidingly connected.

[0104] Reference Figure 10 and Figure 11 As shown, both the first main swing arm 211 and the second main swing arm 212 may include a first arc-shaped portion 2101, a connecting plate portion 2102, and a second arc-shaped portion 2103, which are connected sequentially. The first arc-shaped portion 2101, the connecting plate portion 2102, and the second arc-shaped portion 2103 can be an integrally formed structure; in other words, both the first main swing arm 211 and the second main swing arm 212 can be integrally formed parts. (Refer to...) Figure 12As shown, in the first main swing arm 211, the connecting plate portion 2102 can be connected to the second support plate 120, the first arc-shaped portion 2101 is rotatably and slidably connected to the first support plate 110, and the second arc-shaped portion 2103 is rotatably and slidably connected to the third support plate 130. In the second main swing arm 212, the connecting plate portion 2102 can be connected to the third support plate 130, the first arc-shaped portion 2101 is rotatably and slidably connected to the fourth support plate 140, and the second arc-shaped portion 2103 is rotatably and slidably connected to the second support plate 120.

[0105] When the first swing arm and the second main swing arm 212 are directly connected, the second arc-shaped portion 2103 of the first main swing arm 211 and the second arc-shaped portion 2103 of the second main swing arm 212 are rotatably and slidably connected. At this time, the second arc-shaped portion 2103 of the first main swing arm 211 and the second arc-shaped portion 2103 of the second main swing arm 212 can match each other, and the two overlap each other by means of the arc surface. The two can move relative to each other under the guidance of the overlapping arc surface, so as to realize the relative rotation and sliding between the second arc-shaped portion 2103 of the first main swing arm 211 and the second arc-shaped portion 2103 of the second main swing arm 212.

[0106] Furthermore, combined Figure 8 and Figure 12 As shown, regarding the rotational and sliding connection between the first main swing arm 211 and the first support plate 110, and the rotational and sliding connection between the second main swing arm 212 and the fourth support plate 140, in some embodiments, arc-shaped plates 101 can be provided on both the first support plate 110 and the fourth support plate 140. The arc-shaped plate 101 on the first support plate 110 extends towards the second support plate 120, and the arc-shaped plate 101 on the fourth support plate 140 extends towards the third support plate 130. The first support plate 110 is rotatably and slidably connected to the first main swing arm 211 through the arc-shaped plate 101, and the fourth support plate 140 is rotatably and slidably connected to the second main swing arm 212 through the arc-shaped plate 101. For example, the arc-shaped plate 101 can be integrally formed on the first support plate 110 and the fourth support plate 140. Alternatively, the arc-shaped plate 101 can also be a separate component, and the arc-shaped plate 101 can be connected to the first support plate 110 and the fourth support plate 140 by fasteners such as screws and rivets, or by bonding or welding.

[0107] On the one hand, this avoids the need to create arc-shaped grooves on the first support plate 110 and the fourth support plate 140, which helps to reduce the thickness of the first support plate 110 and the fourth support plate 140, thus meeting the requirement for a thinner and lighter rotating shaft mechanism 23. On the other hand, since the arc-shaped plate 101 of the first support plate 110 (or the fourth support plate 140) extends towards the second support plate 120 (or the third support plate 130), the overlap width between the first main swing arm 211 (or the second main swing arm 212) and the corresponding arc-shaped plate 101 is larger, making the movement of the support assembly 100 more stable and reliable, which helps to enhance the stability and reliability of the rotating shaft mechanism 23.

[0108] It should be noted that the first main swing arm 211 and the second main swing arm 212 enable the four support plates to slide in an arc shape in pairs, giving each support plate of the support assembly 100 a relatively large degree of freedom of movement. Although this ensures that each support plate can rotate and translate relative to the others, the relatively unrestricted free movement of each support plate results in a non-unique and asymmetrical motion trajectory of the support assembly 100, which may affect the motion accuracy of the pivot mechanism 23 and the usability of the foldable device.

[0109] Therefore, based on the first motion component 210, the motion module 200 of the rotating shaft mechanism 23 may also include a second motion component 220 (see...). Figure 8 and Figure 9 The second motion component 220 restricts the movement trajectory of the support component 100, thereby improving the movement accuracy of the support component 100. The second motion component 220 may include a first auxiliary swing arm 221 and a second auxiliary swing arm 222. The first auxiliary swing arm 221 is movably connected to the first support plate 110 and the second support plate 120, and the second auxiliary swing arm 222 is movably connected to the third support plate 130 and the fourth support plate 140. The first auxiliary swing arm 221 defines the movement posture of the first support plate 110 relative to the second support plate 120, and the second auxiliary swing arm 222 defines the movement posture of the fourth support plate 140 relative to the third support plate 130.

[0110] Reference Figure 13 As shown, both the first and second auxiliary swing arms 221 and 222 can include a connected flat plate portion 2201 and an arc plate portion 2202, which can be integrally formed. Both the first and second auxiliary swing arms 221 and 222 can be integrally formed parts. In the first auxiliary swing arm 221, the flat plate portion 2201 is slidably connected to the first support plate 110, and the arc plate portion 2202 is rotatably and slidably connected to the second support plate 120. In the second auxiliary swing arm 222, the flat plate portion 2201 is slidably connected to the fourth support plate 140, and the arc plate portion 2202 is rotatably and slidably connected to the third support plate 130.

[0111] During the rotation and sliding of the arc plate portion 2202 of the first auxiliary swing arm 221 (or the second auxiliary swing arm 222) around the second support plate 120 (or the third support plate 130), the flat plate portion 2201 of the first auxiliary swing arm 221 (or the second auxiliary swing arm 222) slides along the first support plate 110 (or the fourth support plate 140). Thus, guided by the flat plate portion 2201 of the first auxiliary swing arm 221 (or the second auxiliary swing arm 222), the orientation and distance of the first support plate 110 (or the fourth support plate 140) relative to the second support plate 120 (or the third support plate 130) are defined. During the switching between the unfolded and folded states of the pivot mechanism 23, the movement trajectory of the support assembly 100 is unique, and the movement trajectories of the left and right sides of the support assembly 100 are symmetrical to ensure the accuracy and symmetry of the movement of the support assembly 100, thus ensuring the effectiveness of the foldable electronic device.

[0112] For example, the centerline of the support assembly 100 in the width direction can serve as the axis of symmetry of the second motion assembly 220, with the first auxiliary swing arm 221 and the second auxiliary swing arm 222 symmetrically arranged on both sides of this axis of symmetry. With this arrangement, the first auxiliary swing arm 221 and the second auxiliary swing arm 222 are located at the same position in the length direction of the support assembly 100, and the forces transmitted by both to the support assembly 100 are balanced, which enhances the force balance of the rotating shaft mechanism 23 and improves its reliability and service life. Furthermore, the second motion assembly 220 occupies less space in the length direction of the support assembly 100, which is beneficial for the layout design of other components on the support assembly 100.

[0113] Based on the dimensional design of the rotating shaft mechanism 23, multiple first motion components 210 and multiple second motion components 220 can be provided on the support component 100 along its length direction to ensure stable and reliable connection of the support component 100 and improve the stability and accuracy of the rotating shaft mechanism 23's movement. For example, the centerline along the length direction of the support component 100 can serve as the axis of symmetry for each first motion component 210 and each second motion component 220, so that the rotating shaft mechanism 23 experiences balanced forces, thereby improving its smoothness and reliability.

[0114] The aforementioned decorative panel 500 can be connected to the second motion component 220. One decorative panel 500 is connected to the first auxiliary swing arm 221, and the other decorative panel 500 is connected to the second auxiliary swing arm 222. For example, the two decorative panels 500 are respectively connected to the flat plate portion 2201 of the first auxiliary swing arm 221 and the flat plate portion 2201 of the second auxiliary swing arm 222. During the switching between the unfolded and folded states of the pivot mechanism 23, the first auxiliary swing arm 221 and the second auxiliary swing arm 222 respectively drive the two decorative panels 500 to move. When the pivot mechanism 23 is in the unfolded state, the first auxiliary swing arm 221 and the second auxiliary swing arm 222 are coplanar and their arc plate portions 2202 are close to each other, so that the two decorative panels 500 are coplanar and close to each other. When the pivot mechanism 23 is in the folded state, the first auxiliary swing arm 221 and the second auxiliary swing arm 222 are opposite to each other and away from each other, so that the two decorative panels 500 are opposite to each other and their ends are away from each other.

[0115] Figure 14 for Figure 7 A magnified view of the structure at point B in the middle section. (Refer to...) Figure 14 As shown, in this embodiment, the synchronization module 300 includes a first synchronization component 310 and a second synchronization component 320. The first synchronization component 310 is connected to the first support plate 110, the second support plate 120, and the third support plate 130. The first synchronization component 310 uses the second support plate 120 as a reference to ensure that the first support plate 110 and the third support plate 130 are synchronized with respect to the second support plate 120. The second synchronization component 320 is connected to the second support plate 120, the third support plate 130, and the fourth support plate 140. The second synchronization component 320 uses the third support plate 130 as a reference to ensure that the second support plate 120 and the fourth support plate 140 are synchronized with respect to the third support plate 130.

[0116] Under the combined action of the first synchronization component 310 and the second synchronization component 320, the first support plate 110, the second support plate 120, the third support plate 130, and the fourth support plate 140 move in sync to ensure the symmetry of the movement trajectory of the support component 100. During the switching between the unfolded and folded states of the foldable electronic device, the synchronization module 300 in the pivot mechanism 23 ensures the synchronous relative movement of the first housing 21 and the second housing 22, thereby improving the stability and reliability of the foldable electronic device's movement and enhancing the accuracy of the housing component 20's alignment.

[0117] Understandably, under the action of the first synchronization component 310, the first support plate 110 and the third support plate 130, with the second support plate 120 as a fixed reference, exhibit symmetrical motion postures relative to the second support plate 120. Similarly, under the action of the second synchronization component 320, the second support plate 120 and the fourth support plate 140, with the third support plate 130 as a fixed reference, exhibit symmetrical motion postures relative to the third support plate 130. This ensures the symmetry of the overall motion trajectory of the support component 100, guaranteeing that the rotating shaft mechanism 23 drives the first housing 21 and the second housing 22 to move synchronously relative to each other.

[0118] Since the first synchronization component 310 occupies the first support plate 110, the second support plate 120, and the third support plate 130, and the second synchronization component 320 occupies the second support plate 120, the third support plate 130, and the fourth support plate 140, both share support plates. Therefore, the first synchronization component 310 and the second synchronization component 320 cannot be arranged side by side along the width direction of the support component 100, but can be staggered along the length direction of the support component 100.

[0119] Furthermore, the number of synchronization modules 300 can be set according to the size and spatial layout design of the rotating shaft mechanism 23. For example, the rotating shaft mechanism 23 may include one synchronization module 300. In this case, the synchronization module 300 can be located in the middle region along the length of the support component 100 to ensure that the force generated by the synchronization module 300 can keep the support component 100 in balance. Alternatively, the rotating shaft mechanism 23 may also include multiple synchronization modules 300, which can be spaced apart along the length of the support component 100. In this case, the forces generated by different synchronization modules 300 act on different parts of the support component 100, and the support component 100 as a whole can maintain force balance.

[0120] When the rotating shaft mechanism 23 includes multiple synchronization modules 300, each synchronization module 300 can be evenly spaced along the length of the support assembly 100. In this way, each first synchronization component 310 connected to the first support plate 110, the second support plate 120, and the third support plate 130 can evenly distribute the force to various regions along the length of the support assembly 100, ensuring balanced force distribution across the first support plate 110, the second support plate 120, and the third support plate 130. Similarly, each second synchronization component 320 connected to the second support plate 120, the third support plate 130, and the fourth support plate 140 can also evenly distribute the force to various regions along the length of the support assembly 100, ensuring balanced force distribution across the second support plate 120, the third support plate 130, and the fourth support plate 140. Furthermore, along the width of the support assembly 100, the left and right parts of the support assembly 100 are subjected to balanced force, resulting in good overall balance and high reliability of the support assembly 100.

[0121] For example, the number of synchronization modules 300 can be even, and the synchronization modules 300 can be arranged symmetrically in pairs with the center line of the support component 100 along its length as the axis of symmetry (see...). Figure 7 (As shown). In this way, other components such as the motion module 200 and damping module 400 on the shaft mechanism can also be arranged evenly and symmetrically, resulting in better structural symmetry of the shaft mechanism 23. Along the length of the shaft mechanism 23, the upper and lower parts of the shaft mechanism 23 are subjected to balanced forces, resulting in good overall balance, high reliability, and long service life of the shaft mechanism 23.

[0122] Taking a scenario with four synchronization modules 300, two of the synchronization modules 300 can be positioned near both ends of the support component 100 along its length, and these two synchronization modules 300 are symmetrically arranged. The other two synchronization modules 300 can be positioned near the middle of the support component 100 along its length, and these two synchronization modules 300 are also symmetrically arranged. Among the two synchronization modules 300 near both ends of the support component 100, one of the first synchronization component 310 and the second synchronization component 320 (e.g.) Figure 7 The second synchronization component 320 shown is located closer to the end of the support component 100. The other of the two synchronization modules 300 located closer to the middle of the support component 100 is the other of the first synchronization component 310 and the second synchronization component 320 (e.g., Figure 7 The first synchronization component 310 shown is positioned closer to the end of the support component 100.

[0123] Figure 15 This is a schematic diagram of the structure of the synchronization module provided in an embodiment of this application. (Refer to...) Figure 15As shown in the figure, in the synchronization module 300 of this embodiment, the first synchronization component 310 and the second synchronization component 320 have the same structure. The figure shows the structure of one synchronization component. The synchronization module 300 adopts a gear synchronization method. Both the first synchronization component 310 and the second synchronization component 320 may include a first synchronization element 301 and a second synchronization element 302. The first synchronization element 301 and the second synchronization element 302 mesh with each other to achieve synchronization.

[0124] The first synchronizing element 301 may include a connected first synchronizing gear 3011 and a first synchronizing swing arm 3012, which can be integrally formed, and the first synchronizing element 301 is also integrally formed. Similarly, the second synchronizing element 302 may include a second synchronizing gear 3021 and a second synchronizing swing arm 3022, which can also be integrally formed, and the second synchronizing element 302 is also integrally formed. The first synchronizing gear 3011 and the second synchronizing gear 3021 are of the same type and mesh with the same support plate. The first synchronizing swing arm 3012 and the second synchronizing swing arm 3022 slide along the support plates on both sides to achieve synchronous linkage of the three adjacent support plates.

[0125] In the first synchronization assembly 310, the first synchronization gear 3011 of the first synchronization member 301 and the second synchronization gear 3021 of the second synchronization member 302 mesh with the second support plate 120. The first synchronization arm 3012 of the first synchronization member 301 slides along the first support plate 110, and the second synchronization arm 3022 of the second synchronization member 302 slides along the third support plate 130, so as to realize the synchronous linkage of the first support plate 110, the second support plate 120, and the third support plate 130. In the second synchronization assembly 320, the first synchronization gear 3011 of the first synchronization member 301 and the second synchronization gear 3021 of the second synchronization member 302 mesh with the third support plate 130. The first synchronization arm 3012 of the first synchronization member 301 slides along the second support plate 120, and the second synchronization arm 3022 of the second synchronization member 302 slides along the fourth support plate 140, so as to realize the synchronous linkage of the second support plate 120, the third support plate 130, and the fourth support plate 140.

[0126] Continue to refer to Figure 15Both the first synchronization component 310 and the second synchronization component 320 may further include a fixing plate 303, which is disposed at both ends of the meshing first synchronization gear 3011 and second synchronization gear 3021. The fixing plates 303 at both ends limit the relative positions of the first synchronization gear 3011 and the second synchronization gear 3021, ensuring reliable meshing. Furthermore, the fixing plates 303 at both ends allow the first synchronization component 301 and the second synchronization component 302 to be assembled together, making the first synchronization component 310 and the second synchronization component 320 a single integrated structure, facilitating their installation on the support component 100.

[0127] Figure 16 for Figure 7 A magnified view of the structure at point C. (Refer to...) Figure 16 As shown, in this embodiment, the damping module 400 includes a first damping component 410 and a second damping component 420, the structures of which can be identical. The first damping component 410 is connected to the first support plate 110 and the second support plate 120, and can provide damping force at the location of the second support plate 120. The second damping component 420 can be connected to the third support plate 130 and the fourth support plate 140, and can provide damping force at the location of the third support plate 130.

[0128] A damping module 400 is formed by setting a first damping component 410 and a second damping component 420. The first damping component 410 and the second damping component 420 provide damping force on the left and right sides of the support component 100, respectively. The damping force generated by the overall pivot mechanism 23 is balanced from left to right, which can ensure the stability and consistency of the relative movement of the first housing 21 and the second housing 22, and improve the operation feel of the foldable electronic device. Furthermore, the first damping component 410 and the second damping component 420 are set independently and will not interfere with the relative movement of the second support plate 120 and the third support plate 130 in the middle of the support component 100. Compared with an integrated damping structure, the overall structure and movement mode of the damping module 400 in this embodiment are also simpler, and there is no need to design a floating mechanism for the damping module 400 to meet the movement trajectory requirements of the second support plate 120 and the third support plate 130.

[0129] In the damping module 400, the first damping component 410 and the second damping component 420 can be arranged side by side along the width direction of the support component 100 to ensure the balance of the left and right sides of the rotating shaft mechanism 23. Furthermore, depending on the size design and damping force requirements of the rotating shaft mechanism 23, the rotating shaft mechanism 23 may include one or more damping modules 400; this embodiment does not impose any limitations on this. When the rotating shaft mechanism 23 includes one damping module 400, the damping module 400 can be located in the middle of the length direction of the support component 100 to ensure the balance of the damping force generated by the rotating shaft mechanism 23 as a whole. When the rotating shaft mechanism 23 includes two or more damping modules 400, each damping module 400 can be spaced apart along the length direction of the support component 100 so that the damping force of the rotating shaft mechanism 23 can be evenly distributed.

[0130] Taking the rotating shaft mechanism 23, which includes two damping modules 400, as an example, the two damping modules 400 can be located in the upper and lower halves of the rotating shaft mechanism 23 along its length, respectively. Furthermore, with the centerline of the rotating shaft mechanism 23 along its length as the axis of symmetry, the two damping modules 400 can be symmetrically arranged (see...). Figure 7 (As shown). This ensures that both the upper and lower parts of the rotating shaft mechanism 23 generate sufficient damping force, and that the rotating shaft mechanism 23 is force-balanced. For example, the damping module 400 can be located between two adjacent synchronization modules 300.

[0131] Figure 17 This is a schematic diagram of the damping module provided in an embodiment of this application. (Refer to...) Figure 17 As shown in the figure, the structure of a damping component in the damping module 400 is illustrated. In this embodiment, both the first damping component 410 and the second damping component 420 may include a guide post 4011, a damping swing arm 4012, an elastic element 4013, and at least one drive sleeve 4014. The guide post 4011 is fixedly connected to the corresponding support plate. One end of the damping swing arm 4012 is sleeved on the guide post 4011, and the other end slides along an adjacent support plate. The elastic element 4013 and the drive sleeve 4014 are both sleeved on the guide post 4011, and the elastic element 4013 and the drive sleeve 4014 are constrained between the two ends of the damping swing arm 4012. For example, the elastic element 4013 may be a compression spring sleeved on the guide post 4011.

[0132] The drive sleeve 4014 abuts against the end of the damping swing arm 4012, and the drive sleeve 4014 and the end of the damping swing arm 4012 have a mutually engaging concave-convex structure. With the relative movement of two adjacent support plates, the damping swing arm 4012 slides along one of the support plates and rotates around the guide post 4011. The guide post 4011 is fixed relative to the support plate it is on, and the drive sleeve 4014, sleeved outside the guide post 4011, cannot rotate around the guide post 4011, but the drive sleeve 4014 can move axially along the guide post 4011. Thus, as the damping swing arm 4012 rotates around the guide post 4011, the damping swing arm 4012 rotates relative to the drive sleeve 4014. Under the action of the concave and convex structure between the damping swing arm 4012 and the drive sleeve 4014, the drive sleeve 4014 can move axially along the guide post 4011. The drive sleeve 4014 compresses the elastic element 4013, and the elastic force generated by the elastic element 4013 provides damping force for the rotating shaft mechanism 23.

[0133] In the first damping assembly 410, the guide post 4011 can be fixed to the second support plate 120. One end of the damping swing arm 4012 is sleeved on the guide post 4011, and the other end of the damping swing arm 4012 slides along the first support plate 110. During the rotation of the damping swing arm 4012 around the guide post 4011, the drive sleeve 4014 moves axially along the guide post 4011, and the drive sleeve 4014 compresses the elastic element 4013 to generate a damping force in the area where the second support plate 120 is located.

[0134] In the second damping assembly 420, the guide post 4011 can be fixed to the third support plate 130. One end of the damping swing arm 4012 is sleeved on the guide post 4011, and the other end of the damping swing arm 4012 slides along the fourth support plate 140. During the rotation of the damping swing arm 4012 around the guide post 4011, the drive sleeve 4014 moves axially along the guide post 4011, and the drive sleeve 4014 compresses the elastic element 4013 to generate a damping force in the area where the third support plate 130 is located.

[0135] Figure 18 for Figure 17 The exploded structure diagram of the damping module in the image. Combined with... Figure 17 and Figure 18As shown, in the first damping assembly 410 and the second damping assembly 420, the damping swing arm 4012 may include a main body 40121, a stop sleeve 40122, and a sliding plate portion 40123. The main body 40121 of the damping swing arm 4012 may extend along the length direction of the support assembly 100. The stop sleeve 40122 is connected to both ends of the main body 40121 along its length direction, and the stop sleeve 40122 is located on one side of the main body 40121 along its width direction. The sliding plate portion 40123 is connected to the other side of the main body 40121 along its width direction. The damping swing arm 4012 may be a one-piece molded part, or in other words, the main body 40121, the stop sleeve 40122, and the sliding plate portion 40123 are a one-piece molded structure.

[0136] The damping swing arm 4012 is fitted onto the guide post 4011 by stop sleeves 40122 at both ends. Alternatively, the guide post 4011 passes through the stop sleeves 40122 at both ends of the damping swing arm 4012, with both ends of the guide post 4011 extending beyond the two stop sleeves 40122, thus fixing the guide post 4011 to the corresponding support plate. The sliding plate portion 40123 of the damping swing arm 4012 slides along the corresponding support plate. Specifically, in the first damping assembly 410, the stop sleeves 40122 of the damping swing arm 4012 are fitted onto the guide post 4011 on the second support plate 120, and the sliding plate portion 40123 of the damping swing arm 4012 slides along the first support plate 110. In the second damping assembly 420, the stop sleeve 40122 of the damping swing arm 4012 is sleeved on the guide post 4011 on the third support plate 130, and the sliding plate portion 40123 of the damping swing arm 4012 slides along the fourth support plate 140.

[0137] The drive sleeve 4014 abuts against the stop sleeve 40122 of the damping swing arm 4012. The stop sleeve 40122 and the drive sleeve 4014 are provided with mutually cooperating concave and convex structures. For example, the end of the stop sleeve 40122 of the damping swing arm 4012 facing the drive sleeve 4014 has a protrusion 40124, and the end of the drive sleeve 4014 facing the stop sleeve 40122 has a concave portion 40141. The protrusion 40124 and the concave portion 40141 cooperate with each other. During the rotation of the stop sleeve 40122 of the damping swing arm 4012 around the guide post 4011, the protrusion 40124 of the stop sleeve 40122 moves accordingly and abuts against different parts of the drive sleeve 4014. The protrusion 40124 of the stop sleeve 40122 slides along the end face of the drive sleeve 4014 to slide into or out of the recess 40141 of the drive sleeve 4014. Thus, the stop sleeve 40122 pushes against the drive sleeve 4014 as it moves axially along the guide post 4011, and the drive sleeve 4014 compresses the elastic element 4013, changing its compression amount, so that the elastic element 4013 provides a varying damping force.

[0138] Continue to refer to Figure 17 or Figure 18 Regarding the arrangement of the sliding plate portion 40123 of the damping swing arm 4012, in some embodiments, the damping swing arm 4012 may have two sliding plate portions 40123, which are respectively connected to both ends of the main body portion 40121 along its length. In this way, during the movement of the support assembly 100, the two sliding plate portions 40123 at both ends of the damping swing arm 4012 slide synchronously along the corresponding support plates, transmitting the force to the stop sleeves 40122 at both ends of the damping swing arm 4012, causing the stop sleeves 40122 to rotate around the guide post 4011. With this arrangement, the damping swing arm 4012 transmits force simultaneously at both ends, resulting in better stability and higher reliability of the damping swing arm 4012's movement.

[0139] Of course, in other embodiments, the damping swing arm 4012 may also have only one sliding plate portion 40123. In this case, the sliding plate portion 40123 can be connected to the middle part of the main body portion 40121 in the length direction, so as to transmit a balanced force to the stop sleeves 40122 at both ends of the damping swing arm 4012 through the sliding plate portion 40123, thereby ensuring the smoothness of the movement of the damping swing arm 4012. This embodiment does not limit this.

[0140] Continue to refer to Figure 17 or Figure 18 In one implementation, two drive sleeves 4014 can be fitted onto the guide post 4011. The two drive sleeves 4014 abut against the stop sleeves 40122 at both ends of the damping swing arm 4012, respectively. An elastic element 4013 abuts between the two drive sleeves 4014. Both the two drive sleeves 4014 and the corresponding stop sleeves 40122 have mutually cooperating concave-convex structures. Thus, during the rotation of the stop sleeves 40122 at both ends of the damping swing arm 4012 around the guide post 4011, the two stop sleeves 40122 drive the two drive sleeves 4014 to move synchronously. The two drive sleeves 4014 move towards or away from each other along the axial direction of the guide post 4011. The two drive sleeves 4014 jointly compress the elastic element 4013, resulting in a larger deformation of the elastic element 4013 and a greater damping force. Consequently, the damping effect of the damping module 400 is better, the stability of the rotating shaft mechanism 23 is stronger, and the operating feel of the foldable electronic device is improved.

[0141] In another implementation, a drive sleeve 4014 can also be fitted onto the guide post 4011. The drive sleeve 4014 abuts against the stop sleeve 40122 at one end of the damping swing arm 4012, and the elastic element 4013 is located between the drive sleeve 4014 and the stop sleeve 40122 at the other end of the damping swing arm 4012. During the movement of the damping swing arm 4012, only one drive sleeve 4014 compresses the elastic element 4013, resulting in a small deformation of the elastic element 4013. In this case, to enhance the damping effect of the damping module 400, other structures that can increase the damping force can be fitted onto the guide post 4011 to increase the damping force of the damping module 400. For example, a friction pair can be provided between the elastic element 4013 and the stop sleeve 40122 at the other end of the damping swing arm 4012. During the movement of the damping swing arm 4012, the friction force generated by the friction pair compensates for the damping force of the damping module 400.

[0142] As for how to restrict the drive sleeve 4014 to move only along the axial direction of the guide post 4011, refer to... Figure 18 As shown, the outer wall surface of the guide post 4011 may be provided with at least one first guide portion 40111, which makes the arc surface of the outer wall of the guide post 4011 discontinuous. That is, the area on the outer wall surface of the guide post 4011 other than the first guide portion 40111 can be an arc surface, so that the stop sleeve 40122 of the damping swing arm 4012 can rotate around the guide post 4011. The first guide portion 40111 is a surface that is discontinuous with the arc surface of other areas, and the first guide portion 40111 forms a guide surface. The inner wall surface of the drive sleeve 4014 may be provided with at least one second guide portion 40142, which corresponds to and matches the first guide portion 40111.

[0143] The mutual cooperation between the first guide portion 40111 of the guide post 4011 and the second guide portion 40142 of the drive sleeve 4014 limits the circumferential position of the drive sleeve 4014 relative to the guide post 4011, preventing the drive sleeve 4014 from rotating around the guide post 4011. Furthermore, because the contours of the first guide portion 40111 of the guide post 4011 and the second guide portion 40142 of the drive sleeve 4014 match, the drive sleeve 4014 can slide axially along the guide post 4011.

[0144] The first guide portion 40111 on the outer wall of the guide post 4011 can be a plane. Alternatively, the first guide portion 40111 on the outer wall of the guide post 4011 can be an arc surface, and the curvature of this arc surface is different from that of the arc surfaces in other areas of the outer wall of the guide post 4011. Alternatively, the first guide portion 40111 on the outer wall of the guide post 4011 can also be an elliptical surface, a wavy surface, or other surface types. Correspondingly, the second guide portion 40142 on the inner wall of the drive sleeve 4014 can also be a plane, an arc surface with a curvature different from that of the arc surfaces in other areas of the inner wall of the drive sleeve 4014, or an elliptical surface, a wavy surface, or other surface types.

[0145] Taking the first guide portion 40111 on the outer wall of the guide post 4011 as a plane as an example, the second guide portion 40142 on the inner wall of the drive sleeve 4014 can also be a plane. For example... Figure 18 As shown, the outer wall surface of the guide post 4011 can be provided with two first guide portions 40111, which can be arranged opposite each other and parallel to each other. Correspondingly, the inner wall surface of the drive sleeve 4014 can be provided with two second guide portions 40142, which can be arranged opposite each other and parallel to each other. With this arrangement, the force between the drive sleeve 4014 and the guide post 4011 is more balanced, which helps to improve the structural strength of the guide post 4011 and the drive sleeve 4014 and extend the service life of the damping module 400.

[0146] 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 foregoing terms in the embodiments of this application according to the specific circumstances.

[0147] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

Claims

1. A hinge mechanism, applied to a foldable electronic device, characterized in that, The rotating shaft mechanism includes: The support assembly includes a first support plate, a second support plate, a third support plate, and a fourth support plate arranged in parallel in sequence; The motion module is movably connected to the support assembly; At least one synchronization module, the synchronization module including a first synchronization component and a second synchronization component, the first synchronization component being connected to the first support plate, the second support plate and the third support plate, and the second synchronization component being connected to the second support plate, the third support plate and the fourth support plate; At least one damping module includes a first damping component and a second damping component, wherein the first damping component is connected to the first support plate and the second support plate, and the second damping component is connected to the third support plate and the fourth support plate; The motion module includes: The first motion component includes a first main swing arm and a second main swing arm; the first main swing arm is connected to the second support plate, the second main swing arm is connected to the third support plate, and the first main swing arm is rotatably and slidably connected to the first support plate, the second main swing arm is rotatably and slidably connected to the fourth support plate, and the first main swing arm is rotatably and slidably connected to the second main swing arm.

2. The rotating shaft mechanism according to claim 1, characterized in that, The number of synchronization modules is multiple, and each synchronization module is evenly spaced along the length direction of the support component.

3. The rotating shaft mechanism according to claim 2, characterized in that, With the center line of the support component along its length as the axis of symmetry, the synchronization modules are arranged symmetrically in pairs.

4. The rotating shaft mechanism according to any one of claims 1-3, characterized in that, Both the first synchronization component and the second synchronization component include: The first synchronizing element includes a connected first synchronizing gear and a first synchronizing swing arm; The second synchronizing element includes a connected second synchronizing gear and a second synchronizing swing arm; In the first synchronization component, the first synchronization gear and the second synchronization gear mesh with the second support plate, the first synchronization swing arm slides along the first support plate, and the second synchronization swing arm slides along the third support plate; in the second synchronization component, the first synchronization gear and the second synchronization gear mesh with the third support plate, the first synchronization swing arm slides along the second support plate, and the second synchronization swing arm slides along the fourth support plate.

5. The rotating shaft mechanism according to claim 4, characterized in that, Both the first synchronization component and the second synchronization component further include: A fixing plate is disposed at both ends of the first synchronizing gear and the second synchronizing gear.

6. The rotating shaft mechanism according to any one of claims 1-3, characterized in that, Both the first damping component and the second damping component include: Guide pillar; A damping swing arm is sleeved on the guide post and rotates around the guide post; An elastic element and at least one drive sleeve are provided, both of which are sleeved on the guide post; the drive sleeve has a mating concave-convex structure with the damping swing arm, and the drive sleeve moves along the axial direction of the guide post; In the first damping assembly, the guide post is fixed to the second support plate, the damping swing arm rotates relative to the second support plate, and the damping swing arm slides along the first support plate; in the second damping assembly, the guide post is fixed to the third support plate, the damping swing arm rotates relative to the third support plate, and the damping swing arm slides along the fourth support plate.

7. The rotating shaft mechanism according to claim 6, characterized in that, The damping swing arm includes: The main body extends along the length direction of the support assembly; Stop sleeves are connected to both ends of the main body in the length direction and located on one side of the main body in the width direction; the guide post passes through the stop sleeves at both ends, the drive sleeve abuts against the stop sleeves, and the drive sleeve and the stop sleeves have a mutually cooperating concave-convex structure; At least one sliding plate portion is connected to the other side of the main body portion in the width direction; In the first damping assembly, the stop sleeve is located on the second support plate, and the sliding plate slides along the first support plate; in the second damping assembly, the stop sleeve is located on the third support plate, and the sliding plate slides along the fourth support plate.

8. The rotating shaft mechanism according to claim 7, characterized in that, The number of drive sleeves is two, and the two drive sleeves respectively abut against the stop sleeves at both ends, and the elastic element is located between the two drive sleeves.

9. The rotating shaft mechanism according to claim 7, characterized in that, The number of the two sliding plate parts is two, and the two sliding plate parts are respectively connected to the two ends of the main body part along its length.

10. The rotating shaft mechanism according to claim 6, characterized in that, The outer wall surface of the guide post is provided with at least one first guide portion, which makes the arc surface of the outer wall of the guide post discontinuous; The inner wall surface of the drive sleeve is provided with at least one second guide portion, and the first guide portion and the second guide portion correspond to and match each other.

11. The rotating shaft mechanism according to claim 10, characterized in that, The first guide portion is a plane.

12. The rotating shaft mechanism according to claim 11, characterized in that, The outer wall of the guide post is provided with two first guide portions, which are arranged opposite to each other and parallel to each other.

13. The rotating shaft mechanism according to any one of claims 1-3, characterized in that, Both the first main swing arm and the second main swing arm include a first arc-shaped part, a connecting plate part, and a second arc-shaped part connected in sequence; In the first main swing arm, the connecting plate portion is connected to the second support plate, and the first arc-shaped portion is rotatably and slidably connected to the first support plate; in the second main swing arm, the connecting plate portion is connected to the third support plate, and the first arc-shaped portion is rotatably and slidably connected to the fourth support plate; the second arc-shaped portion of the first main swing arm is rotatably and slidably connected to the second arc-shaped portion of the second main swing arm.

14. The rotating shaft mechanism according to any one of claims 1-3, characterized in that, The motion module also includes: The second motion component includes a first auxiliary swing arm and a second auxiliary swing arm, wherein the first auxiliary swing arm is movably connected to the first support plate and the second support plate, and the second auxiliary swing arm is movably connected to the third support plate and the fourth support plate; The first and second auxiliary swing arms each include a connected flat plate portion and an arc plate portion; in the first auxiliary swing arm, the flat plate portion is slidably connected to the first support plate, and the arc plate portion is rotatably and slidably connected to the second support plate; in the second auxiliary swing arm, the flat plate portion is slidably connected to the fourth support plate, and the arc plate portion is rotatably and slidably connected to the third support plate.

15. The rotating shaft mechanism according to claim 14, characterized in that, The first and second auxiliary swing arms are arranged symmetrically.

16. The rotating shaft mechanism according to claim 14, characterized in that, Also includes: Two decorative panels are arranged side by side on the side of the support assembly away from the folding screen, and the two decorative panels are respectively connected to the first auxiliary swing arm and the second auxiliary swing arm.

17. The rotating shaft mechanism according to any one of claims 1-3, characterized in that, When the foldable electronic device is in a folded state, the foldable screen is arranged outside the pivot mechanism.

18. The rotating shaft mechanism according to claim 17, characterized in that, When the rotating shaft mechanism is in the unfolded state, from the first side of the support assembly to the second side of the support assembly, the gap between the first support plate and the second support plate, the gap between the second support plate and the third support plate, and the gap between the third support plate and the fourth support plate all gradually increase. The first side of the support component is the side of the support component facing the foldable screen, and the second side of the support component is opposite to the first side of the support component.

19. A foldable electronic device, characterized in that, Includes a first housing, a second housing, a folding screen, and a pivot mechanism as described in any one of claims 1-18; The pivot mechanism is connected between the first housing and the second housing, the foldable screen is attached to the first housing and the second housing, and the foldable screen is supported by the pivot mechanism.

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