Folding hinge structure and folding electronic device

Abstract

The application provides a folding hinge structure and a folding electronic device. The folding hinge structure comprises a first cam link assembly, a second cam link assembly, an elastic driving assembly and a damping assembly. The first cam link assembly comprises a first cam, a third cam arranged opposite to the first cam, a second cam and a fourth cam arranged opposite to the second cam. The elastic driving assembly is used to provide an elastic driving force to enable the first cam and the third cam and the second cam and the fourth cam to approach each other along the length direction of the first cam link assembly. The damping assembly comprises a damping support arranged between the first cam link assembly and the second cam link assembly and rotating under the action of the elastic force to generate a friction damping force. The folding hinge structure and the folding electronic device provided by the application can bring a damping effect to the user when being opened and closed through the arrangement of the damping assembly.

Description

Technical Field

[0001] This application relates to the field of foldable screen technology, and in particular to a folding hinge structure and a foldable electronic device. Background Technology

[0002] As flexible foldable screen technology matures, flexible foldable electronic products have become a trend. Foldable electronic products (such as foldable phones, foldable tablets, foldable computers, and other electronic devices) need to meet high reliability and a good user experience.

[0003] To ensure a smooth bending experience, foldable electronic devices need to have a certain degree of damping or hovering during the bending process. The folding hinge structure is the core mechanism for achieving folding, but current folding hinge designs suffer from poor feel when opening, failing to provide a better user experience. How to design a damping mechanism to achieve a better user experience is a problem that urgently needs to be solved. Summary of the Invention

[0004] In view of this, this application provides a folding hinge structure with damping effect and a folding electronic device. Using the embodiments of this application, damping is provided during bending or opening, which can ensure the stability of the flexible screen and the structure is simple.

[0005] In a first aspect, embodiments of this application provide a folding hinge structure, comprising: a coaxially rotating first cam link assembly, including a first link and a second link symmetrically arranged, the first link and the second link being rotatable relative to each other; further comprising a first cam group; the first cam group including a first cam, a third cam, a second cam, and a fourth cam opposite to the first cam; wherein, the second end of the first link is fixed with the third cam coaxially rotating with the first link, the second end of the second link is fixed with the fourth cam coaxially rotating with the second link, and the third cam and the fourth cam are located on the same side of the first cam link assembly; the first cam and the second cam do not rotate with the first link and the second link; a second cam link assembly, including a third link and a fourth link symmetrically arranged, the third link and the fourth link being rotatable relative to each other, the third link rotating coaxially with the first link, and the fourth link rotating coaxially with the second link; the first end of the third link is fixedly connected to the first end of the first link via a first link pin, and the first end of the fourth link is fixedly connected to the first end of the first link via a first link pin. The second connecting rod pin is fixedly connected to the first end of the second connecting rod; the first synchronization assembly includes a first drive gear and a second drive gear, the first drive gear is fixed to the second end of the first connecting rod and is disposed on the surface of the third cam opposite to the first cam; the second drive gear is fixed to the second end of the second connecting rod and is disposed on the surface of the fourth cam opposite to the second cam, the first drive gear and the second drive gear mesh with each other; the second synchronization assembly includes a third drive gear and a fourth drive gear, the third drive gear is fixed to the second end of the third connecting rod and the fourth drive gear is fixed to the second end of the fourth connecting rod, the third drive gear and the fourth drive gear mesh with each other; the elastic drive assembly is used to provide an elastic driving force to make the first cam and the third cam, and the second cam and the fourth cam, move closer to each other along the rotation axis direction in which the first connecting rod and the second connecting rod are rotatably connected; the damping assembly includes a damping bracket, the damping bracket is disposed between the first cam connecting rod assembly and the second cam connecting rod assembly, and rotates under the action of elastic force to generate frictional damping force.

[0006] In the embodiments of this application, a damping component is provided in the folding pivot structure. Under the driving action of the elastic drive component, the damping component generates a friction pair with the first cam link assembly and the second cam link assembly, thereby generating a rotational damping force, which can provide a damping effect to the user when opening or closing.

[0007] In one possible design, the elastic drive assembly includes a first abutment plate, a first camshaft, a first elastic element, a second camshaft, and a second elastic element; the first camshaft passes through the first connecting rod and the third connecting rod, and the second camshaft passes through the second connecting rod and the fourth connecting rod, such that the first connecting rod and the second connecting rod rotate relative to each other, and the third connecting rod and the fourth connecting rod rotate relative to each other; the first camshaft also passes through the first cam and the damping bracket, and the second camshaft also passes through the second cam and the damping bracket; the first abutment plate is located at the end of the first camshaft and the second camshaft away from the first cam and the second cam; the first elastic element is sleeved on the first camshaft, and both ends of the first elastic element elastically abut against the side of the first cam opposite to the third cam and the first abutment plate, respectively; the second elastic element is sleeved on the second camshaft, and both ends of the second elastic element elastically abut against the side of the second cam opposite to the fourth cam and the first abutment plate, respectively.

[0008] Based on this design, the elastic drive assembly can drive the first cam and the third cam, as well as the second cam and the fourth cam, to move closer to each other along the rotation axis between the first link and the second link.

[0009] In one possible design, the second cam link assembly further includes a second cam group, and the folding pivot structure further includes a limiting plate. The second cam group includes a fifth cam, a seventh cam, a sixth cam, and an eighth cam opposite to the fifth cam. The second end of the third link is fixed with the seventh cam, which rotates coaxially with the third link. The second end of the fourth link is fixed with the eighth cam, which rotates coaxially with the fourth link. The seventh and eighth cams are located on the same side of the second cam link assembly. The fifth and sixth cams do not rotate with the third and fourth links. The limiting plate is located at the end of the first and second cam shafts away from the fifth and sixth cams, and the sides of the fifth and sixth cams opposite to the seventh and eighth cams abut against the limiting plate. Based on this design, the embodiments of this application can provide a damping effect to the user when opening or closing.

[0010] In one possible design, the first synchronization component further includes two first synchronization gears, which are disposed between the first drive gear and the second drive gear, with adjacent first drive gears, the two first synchronization gears, and the second drive gear meshing with each other. The second synchronization component further includes two second synchronization gears, which are disposed between the third drive gear and the fourth drive gear, with adjacent third drive gears, the two second synchronization gears, and the fourth drive gear meshing with each other. Based on this design, the second synchronization gears can enable the third and fourth links in the second cam linkage assembly to move synchronously, maintaining the synchronization of the folding hinge structure and the folding electronic device.

[0011] In one possible design, the first cam and the second cam are fixedly connected or integrally formed by a first connecting plate, and the fifth cam and the sixth cam are fixedly connected or integrally formed by a second connecting plate; the elastic drive assembly further includes a third camshaft, a third elastic element, a fourth camshaft, and a fourth elastic element; the third camshaft passes through the first connecting plate, one first synchronous gear, the damping bracket, one second synchronous gear, and the second connecting plate; the fourth camshaft passes through the first connecting plate, another first synchronous gear, the damping bracket, another second synchronous gear, and the second connecting plate; the third elastic element is sleeved on the third camshaft, and both ends of the third elastic element elastically abut against the side of the first connecting plate opposite to the third cam and the abutment plate, respectively; the fourth elastic element is sleeved on the fourth camshaft, and both ends of the fourth elastic element elastically abut against the side of the first connecting plate opposite to the fourth cam and the abutment plate, respectively.

[0012] In one possible design, the damping assembly further includes a third cam group, the damping bracket includes a ninth cam and a tenth cam, the third cam group includes an eleventh cam and a twelfth cam opposite to the ninth cam; the ninth cam and the eleventh cam are both sleeved on the first camshaft, the tenth cam and the twelfth cam are both sleeved on the second camshaft, the ninth cam meshes with the eleventh cam, and the tenth cam meshes with the twelfth cam; the ninth cam and the tenth cam are fixed at both ends of the damping bracket, the first camshaft passes through the ninth cam, and the second camshaft passes through the tenth cam; the second end of the third link is fixed with the eleventh cam that rotates coaxially with the third link, and the second end of the fourth link is fixed with the twelfth cam that rotates coaxially with the fourth link; or, the second end of the first link is fixed with the eleventh cam that rotates coaxially with the first link, and the second end of the second link is fixed with the twelfth cam that rotates coaxially with the second link.

[0013] In one possible design, the damping assembly further includes a third cam group comprising a ninth cam, a tenth cam, a fifteenth cam, and a sixteenth cam. The damping bracket includes a first double-sided cam and a second double-sided cam. The first double-sided cam is located between the ninth cam and the fifteenth cam, and the second double-sided cam is located between the tenth cam and the sixteenth cam. The first double-sided cam includes an eleventh cam opposite to the ninth cam and a thirteenth cam opposite to the fifteenth cam. The second double-sided cam includes a twelfth cam opposite to the tenth cam and a fourteenth cam opposite to the sixteenth cam. The ninth, eleventh, thirteenth, and fifteenth cams are all mounted on the first camshaft. The tenth, twelfth, and fourteenth cams... The first and sixteenth cams are both mounted on the second camshaft; the first double-sided cam and the second double-sided cam are fixed at both ends of the damping bracket, the first camshaft passes through the first double-sided cam, and the second camshaft passes through the second double-sided cam; the ninth cam meshes with the eleventh cam, the tenth cam meshes with the twelfth cam, the thirteenth cam meshes with the fifteenth cam, and the fourteenth cam meshes with the sixteenth cam; the second end of the first connecting rod is fixed with the ninth cam, which rotates coaxially with the first connecting rod; the second end of the second connecting rod is fixed with the tenth cam, which rotates coaxially with the second connecting rod; the second end of the third connecting rod is fixed with the fifteenth cam, which rotates coaxially with the third connecting rod; and the second end of the fourth connecting rod is fixed with the sixteenth cam, which rotates coaxially with the fourth connecting rod. Based on this design, the embodiments of this application can provide a damping effect to the user when opening or closing.

[0014] In one possible design, the coaxially rotating damping assembly further includes a first friction plate, a second friction plate, and a third friction plate. The first friction plate is sleeved on the first camshaft, the second camshaft, the third camshaft, and the fourth camshaft, and is close to the first drive gear and the second drive gear. The first end of the second friction plate is sleeved on the first connecting rod pin, and the second end of the second friction plate is sleeved on the first camshaft, with the second end located between the first friction plate and the damping bracket. The first end of the third friction plate is sleeved on the second connecting rod pin, and the second end of the third friction plate is sleeved on the second camshaft, with the second end located between the first friction plate and the damping bracket. Based on this design, the damping force of the folding electronic device during rotation can be improved, providing a damping effect to the user when opening or closing.

[0015] In one possible design, the damping assembly further includes a fourth friction plate, a fifth friction plate, and a sixth friction plate; the fourth friction plate is sleeved on the first camshaft, the second camshaft, the third camshaft, and the fourth camshaft; the fourth friction plate is positioned close to the third drive gear and the fourth drive gear; the first end of the fifth friction plate is sleeved on the first connecting rod pin, and the second end of the fifth friction plate is sleeved on the first camshaft, with the second end located between the fourth friction plate and the damping bracket; the first end of the sixth friction plate is sleeved on the second connecting rod pin, and the second end of the sixth friction plate is sleeved on the second camshaft, with the second end of the sixth friction plate coaxially rotating between the fourth friction plate and the damping bracket. Based on this design, the damping force of the folding electronic device during rotation can be improved, providing a damping effect to the user when opening or closing.

[0016] In one possible design, the elastic drive assembly further includes a fifth elastic element, a sixth elastic element, and a second abutment plate; the fifth elastic element is sleeved on the first camshaft, and its two ends elastically abut against the side of the fifth cam opposite to the seventh cam and the second abutment plate, respectively, to abut against the limiting piece; the sixth elastic element is sleeved on the second camshaft, and its two ends elastically abut against the side of the sixth cam opposite to the eighth cam and the second abutment plate, respectively, to abut against the limiting piece.

[0017] In one possible design, the elastic drive assembly further includes a fifth elastic element, a sixth elastic element, a seventh elastic element, an eighth elastic element, and a second abutment plate; the fifth elastic element is sleeved on the first camshaft, and its two ends elastically abut against the side of the fifth cam opposite to the seventh cam and the second abutment plate, respectively, to abut against the limiting piece; the sixth elastic element is sleeved on the second camshaft, and its two ends elastically abut against the side of the sixth cam opposite to the eighth cam and the second abutment plate, respectively, to abut against the limiting piece; the seventh elastic element is sleeved on the third camshaft, and its two ends elastically abut against the side of the second connecting plate opposite to the seventh cam and the second abutment plate, respectively, to abut against the limiting piece; the eighth elastic element is sleeved on the fourth camshaft, and its two ends elastically abut against the side of the second connecting plate opposite to the eighth cam and the second abutment plate, respectively, to abut against the limiting piece.

[0018] In one possible design, the damping assembly further includes a first friction plate, a second friction plate, a third friction plate, a fourth friction plate, a fifth friction plate, and a sixth friction plate; the second and third friction plates are each sleeved on the ends of the first camshaft, the second cam, the third camshaft, and the fourth camshaft away from the first and second cams; the fifth and sixth friction plates are each sleeved on the ends of the first camshaft, the second camshaft, the third camshaft, and the fourth camshaft away from the fifth and sixth cams; a first friction plate is respectively sleeved on one end of the first camshaft, the second camshaft, the third camshaft, and the fourth camshaft, and the first friction plate is located between the second friction plate and the... Between the third friction plates; a fourth friction plate is respectively sleeved on the other end of the first camshaft, the second camshaft, the third camshaft, and the fourth camshaft, and the fourth friction plate is located between the fifth friction plate and the sixth friction plate; the two ends of the first elastic member elastically abut against the third friction plate and the side of the first cam that is away from the third cam; the two ends of the second elastic member elastically abut against the third friction plate and the side of the second cam that is away from the fourth cam; the two ends of the fifth elastic member elastically abut against the sixth friction plate and the side of the fifth cam that is away from the seventh cam; the two ends of the sixth elastic member elastically abut against the sixth friction plate and the side of the sixth cam that is away from the eighth cam.

[0019] In one possible design, the two ends of the third elastic member elastically abut against the third friction plate and the side of the first connecting plate opposite to the third cam, respectively; the two ends of the fourth elastic member elastically abut against the third friction plate and the side of the first connecting plate opposite to the fourth cam, respectively; the two ends of the seventh elastic member elastically abut against the sixth friction plate and the side of the second connecting plate opposite to the seventh cam, respectively; and the two ends of the eighth elastic member elastically abut against the sixth friction plate and the side of the second connecting plate opposite to the eighth cam, respectively.

[0020] In one possible design, the rotation of the first connecting rod causes the first camshaft and the second camshaft to rotate together.

[0021] In one possible design, when the first connecting rod rotates, it drives the first camshaft, the second camshaft, the third camshaft, and the fourth camshaft to rotate together.

[0022] Secondly, embodiments of this application also provide a folding pivot structure, including: a first limiting piece; a coaxially rotating first cam link assembly, including a first link and a second link symmetrically arranged, the first link and the second link being rotatable relative to each other; further including a first cam group; the first cam group includes a first cam, a third cam opposite to the first cam, a second cam, and a fourth cam opposite to the second cam; wherein, the second end of the first link is fixed with the first cam coaxially rotating with the first link, the second end of the second link is fixed with the second cam coaxially rotating with the second link, and the first cam and the second cam are located on the same side of the first cam link assembly; the first cam... A two-cam linkage assembly includes a symmetrically arranged third and fourth linkage, which are rotatable relative to each other. The third linkage rotates coaxially with the first linkage, and the fourth linkage rotates coaxially with the second linkage. It further includes a second cam group, wherein the first end of the third linkage is fixedly connected to the first end of the first linkage via a first linkage pin, and the first end of the fourth linkage is fixedly connected to the first end of the second linkage via a second linkage pin. The second cam group includes a fifth cam, a seventh cam, a sixth cam, and an eighth cam opposite to the fifth cam. The second end of the third linkage is fixed with the seventh cam, which rotates coaxially with the third linkage. The second end of the fourth link is fixed with the eighth cam, which rotates coaxially with the fourth link, and the seventh cam and the eighth cam are located on the same side of the second cam link assembly; the first synchronization assembly includes a first drive gear and a second drive gear, the first drive gear is fixed to the second end of the first link, and the first drive gear is disposed on the surface of the third cam facing away from the first cam; the second drive gear is fixed to the second end of the second link, and the second drive gear is disposed on the surface of the fourth cam facing away from the second cam, and the first drive gear and the second drive gear mesh with each other; the second synchronization assembly includes a third drive gear and a fourth drive gear, the third drive gear being fixed to the... The fourth drive gear is fixed to the second end of the third link, and the third drive gear and the fourth drive gear mesh with each other; the elastic drive assembly includes a first elastic element, a first camshaft, a second camshaft, and a second elastic element; the two ends of the first elastic element elastically abut against the side of the third cam that is opposite to the first cam and the side of the fifth cam that is opposite to the seventh cam, respectively; the two ends of the second elastic element elastically abut against the side of the fourth cam that is opposite to the second cam and the side of the sixth cam that is opposite to the eighth cam, respectively; the first camshaft passes through the first limiting piece, the first link, and the third link, and the first camshaft also passes through the first cam and the third cam;The second camshaft passes through the first limiting plate, the second connecting rod, and the fourth connecting rod. The second camshaft also passes through the second cam and the fourth cam. The first limiting plate does not rotate with the first connecting rod and the second connecting rod.

[0023] In this embodiment of the application, by setting the elastic drive component at the middle position of the folding pivot structure, the first connecting plate and the second connecting plate can move towards the middle position. Based on this design, a damping effect can also be provided to the user when opening and closing.

[0024] In one possible design, the folding pivot structure further includes a second limiting plate; the second limiting plate is sleeved on the second end of the first camshaft and the second camshaft, and the second limiting plate does not rotate with the third link and the fourth link. Based on this design, the damping force can be increased, and the damping effect can be improved.

[0025] Thirdly, embodiments of this application also provide a foldable electronic device, including a flexible screen, a first housing, and a second housing. The foldable electronic device further includes a folding hinge structure as described above. The first housing and the second housing rotate relative to each other or in opposite directions via the folding hinge structure. The first housing includes a first surface, and the second housing includes a second surface. The flexible screen continuously covers the first surface of the first housing, the folding hinge structure, and the second surface of the second housing, and the flexible screen is fixedly connected to the first surface of the first housing and the second surface of the second housing, respectively.

[0026] The folding hinge structure and folding electronic device provided in this application provide a damping component in the folding hinge structure. Under the driving action of the elastic drive component, the damping component generates a friction pair with the first cam link assembly and the second cam link assembly, thereby generating a rotational damping force, which can provide a damping effect to the user when opening or closing. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a foldable electronic device provided in an embodiment of this application.

[0028] Figure 2 This is a schematic diagram of the folding hinge structure in an embodiment of this application.

[0029] Figure 3 This is a disassembly diagram of the folding hinge structure according to an embodiment of this application.

[0030] Figure 4 This is another disassembly diagram of the folding hinge structure according to an embodiment of this application.

[0031] Figure 5This is a schematic diagram of another embodiment of the folding hinge structure of this application.

[0032] Figure 6 This is a schematic diagram of another embodiment of the folding hinge structure of this application.

[0033] Figure 7 This is a schematic diagram of another embodiment of the folding hinge structure of this application.

[0034] Figure 8 This is a schematic diagram of another embodiment of the folding hinge structure of this application.

[0035] Figure 9 This is a schematic diagram of another embodiment of the folding hinge structure of this application.

[0036] Figure 10 This is a schematic diagram of another embodiment of the folding hinge structure of this application.

[0037] Figure 11 This is a schematic diagram of another embodiment of the folding hinge structure of this application.

[0038] Figure 12 This is a schematic diagram of another embodiment of the folding hinge structure of this application.

[0039] Figure 13 This is a schematic diagram of another embodiment of the folding hinge structure of this application.

[0040] Figure 14 This is a schematic diagram of another embodiment of the folding hinge structure of this application.

[0041] Figure 15 This is a schematic diagram of another embodiment of the folding hinge structure of this application.

[0042] Figure 16 This is a schematic diagram of another embodiment of the folding hinge structure of this application.

[0043] Figure 17 This is a schematic diagram of another embodiment of the folding hinge structure of this application.

[0044] Figure 18 This is a schematic diagram of another embodiment of the folding hinge structure of this application.

[0045] Figure 19 This is a schematic diagram of another embodiment of the folding hinge structure of this application.

[0046] Figure 20 This is a schematic diagram of another embodiment of the folding hinge structure of this application.

[0047] Figure 21 This is a schematic diagram of another embodiment of the folding hinge structure of this application.

[0048] Explanation of main component symbols

[0049]

[0050]

[0051] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0052] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or may also have a component that is centrally located. When a component is considered to be "set" on another component, it can be directly set on the other component or may also have a component that is centrally located.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0054] Please see Figure 1 This is a schematic diagram of the structure of a foldable electronic device 100 provided in an embodiment of this application. In some possible implementations, the foldable electronic device 100 can be at least one of a foldable mobile phone, a foldable tablet, a foldable computer, a foldable laptop, a vehicle-mounted mobile device, or an electronic device equipped with a flexible foldable display screen. In the embodiments of this application, the foldable electronic device 100 can be a foldable mobile phone and its folding method can be inward folding or outward folding.

[0055] The foldable electronic device 100 may include a folding hinge structure 10, a first housing 20, a second housing 30, and a flexible screen 40. The first housing 20 and the second housing 30 are respectively connected to opposite sides of the foldable electronic device 100, allowing the first housing 20 and the second housing 30 to rotate relative to each other or in opposite directions via the folding hinge structure 10, thus switching between a flattened state and a folded state. The flexible screen 40 is disposed on the first housing 20, the folding hinge structure 10, and the second housing 30. Specifically, the first housing 20 includes a first surface, the second housing 30 includes a second surface, and the flexible screen 40 continuously covers the first surface of the first housing 20, the folding hinge structure 10, and the second surface of the second housing 30, and the flexible screen 40 is fixedly connected to both the first surface of the first housing 20 and the second surface of the second housing 30.

[0056] It is understood that in some implementations, the flexible screen 40 can be used to display information and provide an interactive interface for the user. The flexible screen 40 can be fixedly connected to the first housing 20 and the second housing 30 by means of adhesive dispensing. The first housing 20 and the second housing 30 can each form an installation space for installing electronic components such as the circuit board, battery, receiver, speaker, and camera of the foldable electronic device 100. The circuit board can integrate electronic components such as the main controller, storage unit, antenna module, and power management module of the foldable electronic device 100, while the battery can power the flexible screen, circuit board, receiver, speaker, camera, and other electronic components.

[0057] When the first housing 20 and the second housing 30 rotate towards each other until they are stacked (stacked means that their sides can be fitted without gaps or spaced apart), the foldable electronic device 100 can be in a folded state. Conversely, when the first housing 20 and the second housing 30 rotate backwards from their stacked state until they reach their limit position, i.e., when they can no longer rotate backwards, the first housing 20 and the second housing 30 are flattened, and the foldable electronic device 100 is in a flattened state. When the foldable electronic device 100 is fully flattened, the flexible screen 40 can be flattened, and the foldable electronic device 100 has the effect of a large screen display. In the folded state, the first housing 20 is stacked on top of the second housing 30, and the flexible screen 40 can be sandwiched between the first housing 20 and the second housing 30.

[0058] It is understood that the folding electronic device 100 can open from 0° to 180°. That is, the folding electronic device 100 can be flattened or completely closed. Optionally, the folding electronic device 100 can open to 30°, 70°, 150°, and 180°. When the folding electronic device 100 is opened to 70°-150°, the folding electronic device 100 can freely stop at the desired angle. It is understood that the folding electronic device 100 can freely stop at any angle between 0° and 180°.

[0059] This application provides a folding electronic device 100 that provides a damped feel during opening and folding. This function is primarily achieved through the folding hinge structure 10 of the folding electronic device 100. For ease of understanding, a detailed description is provided below with reference to the accompanying drawings and specific embodiments.

[0060] Please refer to the following: Figures 2 to 4 This is a schematic diagram of an embodiment of a folding hinge structure 10 provided in this application.

[0061] It is understood that in this embodiment, the folding pivot structure 10 may include a first cam link assembly 11, a second cam link assembly 12, a damping assembly 13, an elastic drive assembly 14, a limiting piece 15, a first link pin 16, and a second link pin 17.

[0062] Specifically, the first cam link assembly 11 may include a first link 111, a second link 112, a first cam group 113, and a first connecting plate 114. The first link 111 and the second link 112 are symmetrically arranged and can rotate relative to each other. The first cam group 113 may include a first cam 1132 engaged with the first cam 1132 and a third cam 1133 disposed opposite to the first cam 1132. The first cam group 113 may also include a second cam 1134 engaged with the second cam 1134 and a fourth cam 1135 disposed opposite to the second cam 1134. The first cam 1132 may be disposed at the first end of the first connecting plate 114, and the third cam 1133 may be disposed at the second end of the first connecting plate 114. It should be noted that, in the embodiments of this application, the first cam 1132 and the second cam 1134 need not rotate with the first link 111 and the second link 112. Therefore, the first cam 1132 and the second cam 1134 can be fixedly connected by the first connecting plate 114 or made into a cam structure, or they can be fixed in other ways. This application does not make specific limitations.

[0063] In one embodiment of this application, the first cam 1132 and the second cam 1134 are fixedly connected or integrally formed.

[0064] The first end of the first connecting rod 111 can be fixedly connected to the first end of the first connecting rod pin 16. Specifically, the first end of the first connecting rod 111 can be provided with a first fixing hole 1111, which can cooperate with the first end of the first connecting rod pin 16. The first end of the first connecting rod pin 16 can be inserted into the first fixing hole 1111 and fixed within it. The first end of the second connecting rod 112 can be fixedly connected to the first end of the second connecting rod pin 17. Specifically, the first end of the second connecting rod 112 can be provided with a second fixing hole 1121, which can cooperate with the first end of the second connecting rod pin 17. The first end of the second connecting rod pin 17 can be inserted into the second fixing hole 1121 and fixed within it.

[0065] It is understood that the second end of the first connecting rod 111 is fixed with the third cam 1133, which rotates coaxially with the first connecting rod 111, and the second end of the second connecting rod 112 is fixed with the fourth cam 1135, which rotates coaxially with the second connecting rod 112, and the third cam 1133 and the fourth cam 1135 are located on the same side of the first cam connecting rod assembly 11.

[0066] In this embodiment, the second cam link assembly 12 may include a third link 121, a fourth link 122, a second cam group 123, and a second connecting plate 124. The third link 121 and the fourth link 122 are symmetrically arranged and can rotate relative to each other. The third link 121 rotates coaxially with the first link 111, and the fourth link 122 rotates coaxially with the second link 112. The second cam group 123 may include a meshing fifth cam 1232 and a seventh cam 1233 opposite to the fifth cam 1232. The second cam group 123 may also include a meshing sixth cam 1234 and an eighth cam 1235 opposite to the sixth cam 1234. The fifth cam 1232 is fixed to the second end of the third connecting rod 121, the seventh cam 1233 can be disposed at the first end of the second connecting plate 124, the sixth cam 1234 is fixed to the second end of the fourth connecting rod 122, and the eighth cam 1235 can be disposed at the second end of the second connecting plate 124. Similarly, in the embodiments of this application, the seventh cam 1233 and the eighth cam 1235 only need not rotate with the third connecting rod 121 and the fourth connecting rod 122. Therefore, in addition to being fixedly connected by the second connecting plate 124 or made into a connected cam structure, the seventh cam 1233 and the eighth cam 1235 can also be fixed in other ways. This application does not make specific limitations.

[0067] The first end of the third connecting rod 121 can be fixedly connected to the second end of the first connecting rod pin 16. Specifically, the first end of the third connecting rod 121 can be provided with a third fixing hole 1211, which can cooperate with the second end of the first connecting rod pin 16. The second end of the first connecting rod pin 16 can be inserted into the third fixing hole 1211 and fixed within it. The first end of the fourth connecting rod 122 can be fixedly connected to the second end of the second connecting rod pin 17. Specifically, the first end of the fourth connecting rod 122 can be provided with a fourth fixing hole 1221, which can cooperate with the second end of the second connecting rod pin 17. The second end of the second connecting rod pin 17 can be inserted into the fourth fixing hole 1221 and fixed within it. It is understood that the second end of the third link 121 is fixed with the fifth cam 1232, which rotates coaxially with the third link 121, and the second end of the fourth link 122 is fixed with the sixth cam 1234, which rotates coaxially with the fourth link 122, and the fifth cam 1232 and the sixth cam 1234 are located on the same side of the second cam link assembly 12.

[0068] The elastic drive assembly 14 includes a first abutment plate 141, a first camshaft 142, a first elastic element 143, a second camshaft 144, and a second elastic element 145. One end of the first camshaft 142 can be connected to the first abutment plate 141, and the other end of the first camshaft 142 can pass through the first elastic element 143 and pass through the rotation axis of the first connecting rod 111 and the third connecting rod 121, thereby realizing the relative rotation of the first connecting rod 111 and the third connecting rod 121. It also passes through the axis of the first cam 1132 and the seventh cam 1233. One end of the second camshaft 144 is connected to the first abutment plate 141, and the other end of the second camshaft 144 can pass through the second elastic element 145 and pass through the rotation axis of the second connecting rod 112 and the fourth connecting rod 122, thereby realizing the relative rotation of the second connecting rod 112 and the fourth connecting rod 122. It also passes through the axis of the second cam 1134 and the eighth cam 1235. The first elastic element 143 and the second elastic element 145 are respectively sleeved on the first camshaft 142 and the second camshaft 144. The two ends of the first elastic element 143 elastically abut against the side of the first camshaft 1132 opposite to the third camshaft 1133 and the first abutment plate 141, respectively. The two ends of the second elastic element 145 elastically abut against the side of the second camshaft 1134 opposite to the fourth camshaft 1135 and the first abutment plate 141, respectively. Based on this design, the first camshaft 142 can sequentially pass through the first abutment plate 141, the first elastic element 143, the first camshaft 1132, and the third camshaft 1133. The second camshaft 144 can sequentially pass through the first abutment plate 141, the second elastic element 145, the second camshaft 1134, and the fourth camshaft 1135.

[0069] It is understood that the first camshaft 142 can pass through the first connecting rod 111 and the third connecting rod 121, and the second camshaft 144 can pass through the second connecting rod 112 and the fourth connecting rod 122, so that the first connecting rod 111 and the second connecting rod 112 can rotate relative to each other, and the third connecting rod 121 and the fourth connecting rod 122 can rotate relative to each other.

[0070] In this embodiment, the opposing sides of the first cam 1132 and the third cam 1133 are respectively provided with engaging protrusions and notches. The opposing sides of the second cam 1134 and the fourth cam 1135 are respectively provided with engaging protrusions and notches. Based on this design, the elastic drive assembly 14 can drive the first cam 1132 and the third cam 1133, as well as the second cam 1134 and the fourth cam 1135 in the first cam group 113 to cooperate in order to unfold or fold the foldable electronic device 100. Specifically, the elastic drive assembly 14 is used to provide an elastic driving force so that the first cam 1132 and the third cam 1133, and the second cam 1134 and the fourth cam 1135 can move closer to each other along the rotation axis direction of the first connecting rod 111 and the second connecting rod 112. The opposing sides of the fifth cam 1232 and the seventh cam 1233 are respectively provided with engaging protrusions and notches. The sixth cam 1234 and the eighth cam 1235 have engaging protrusions and notches on their opposite sides, respectively. Based on this design, the elastic drive assembly 14 can drive the fifth cam 1232 and the seventh cam 1233, as well as the sixth cam 1234 and the eighth cam 1235 in the second cam group 123, to cooperate in unfolding or folding the foldable electronic device 100. Specifically, the elastic drive assembly 14 provides an elastic driving force to bring the fifth cam 1232 and the seventh cam 1233, and the sixth cam 1234 and the eighth cam 1235, closer together along the length of the second cam link assembly 12.

[0071] In this embodiment, both the first elastic element 143 and the second elastic element 145 can be energy storage springs.

[0072] In this embodiment, the folding hinge structure 10 further includes a first synchronization component 18.

[0073] The first synchronization component 18 may include a first drive gear 181 and a second drive gear 182. The first drive gear 181 is fixed to the second end of the first connecting rod 111, and is disposed on the surface of the third cam 1133 opposite to the first cam 1132 and sleeved on the first camshaft 142. The second drive gear 182 is fixed to the second end of the second connecting rod 112, and may be disposed on the surface of the fourth cam 1135 opposite to the second cam 1134 and sleeved on the second camshaft 144. In this application scenario, the first drive gear 181 and the second drive gear 182 can mesh with each other.

[0074] In this embodiment, the folding hinge structure 10 may further include a second synchronization component 19.

[0075] The second synchronization component 19 may include a third drive gear 191 and a fourth drive gear 192. The third drive gear 191 is fixed to the second end of the third connecting rod 121 and can be sleeved on the first camshaft 142. The fourth drive gear 192 is fixed to the second end of the fourth connecting rod 122 and can be sleeved on the second camshaft 144. In this application scenario, the third drive gear 191 and the fourth drive gear 192 can mesh with each other.

[0076] Based on this design, the first link 111, the second link 112, the third link 121, and the fourth link 122 are all links with drive gear structures, which can be used to drive the movement of other components. For example, the meshing between the first link 111 and the second link 112, and the meshing between the third link 121 and the fourth link 122, ensures the synchronization of the movement of the foldable electronic device 100. The first link 111 and the third link 121 are connected by a first link pin 16, and the second link 112 and the fourth link 122 are connected by a second link pin 17, thereby also maintaining the synchronization of the movement of the foldable electronic device 100.

[0077] In this embodiment, the damping component 13 includes a damping bracket 131.

[0078] The damping bracket 131 is disposed between the first cam link assembly 11 and the second cam link assembly 12, and rotates under the action of elasticity to generate a certain frictional damping force, thereby ensuring that damping force is generated within a set angle. Specifically, the damping bracket 131 is disposed between the first link 111 and the second link 112, and between the third link 121 and the fourth link 122.

[0079] Specifically, the damping bracket 131 is provided with through holes 1311 and 1312, the second connecting plate 124 is provided with through holes 1241 and 1242, and the limiting piece 15 may be provided with a first slot 151 and a second slot 152. Based on this design, the second end of the first camshaft 142 can pass sequentially through the first abutment plate 141, the first elastic element 143, the first cam 1132, the third cam 1133, the first drive gear 181, the through hole 1311 of the damping bracket 131, the third drive gear 191, the through hole 1241 of the second connecting plate 124, and the first slot 151, thereby being snapped into the first slot 151. The second camshaft 144 can sequentially pass through the first abutment plate 141, the second elastic element 145, the second cam 1134 and the fourth cam 1135, the second drive gear 182, the through hole 1312 of the damping bracket 131, the fourth drive gear 192, the through hole 1242 of the second connecting plate 124, and the second slot 152, thereby being snapped into the second slot 152. Based on this design, the limiting piece 15 can ensure that the first camshaft 142 and the second camshaft 144 will not come out of the folding pivot structure 10 under the action of spring force. It can be understood that the limiting piece 15 is located at the end of the first camshaft 142 and the second camshaft 144 away from the fifth cam and the sixth cam, and the sides of the fifth cam 1232 and the sixth cam 1234 opposite to the seventh cam 1233 and the eighth cam 1235 both abut against the limiting piece 15.

[0080] It is understood that the elastic drive assembly 14 can provide an elastic drive force to bring the first cam 1132 and the third cam 1133, as well as the second cam 1134 and the fourth cam 1135, closer to each other along the rotation axis direction of the first link 111 and the second link 112.

[0081] Based on this design, the damping bracket 131, under the driving force provided by the elastic drive assembly 14, can generate a friction pair with the first link 111, the second link 112, the third link 121 and the fourth link 122, thereby increasing the rotational damping force, realizing the intermediate suspension requirement of the folding electronic device 100 rotation, and providing the user with a damping feel.

[0082] It is understood that, in another possible embodiment, the first synchronization component 18 may further include an even number of first synchronization gears 183, and the second synchronization component 19 may further include an even number of second synchronization gears 193. The first synchronization gear 183 may be disposed between the first drive gear 181 and the second drive gear 182. In this application scenario, adjacent first drive gears 181, first synchronization gears 183, and second drive gears 182 can mesh with each other. The second synchronization gear 193 may be disposed between the third drive gear 191 and the fourth drive gear 192. In this application scenario, adjacent third drive gears 191, second synchronization gears 193, and fourth drive gears 192 can mesh with each other.

[0083] In some possible implementations, the elastic drive assembly 14 may further include a third camshaft 146, a third elastic element 147, a fourth camshaft 148, and a fourth elastic element 149. One end of the third camshaft 146 may be connected to the first abutment plate 141, and the other end of the third camshaft 146 may pass through the third elastic element 147 and the first connecting plate 114, and sequentially pass through the first synchronizing gear 183, the damping bracket 131, the second synchronizing gear 193, the second connecting plate 124, and the limiting piece 15, and be fixed to the limiting piece 15. One end of the fourth camshaft 148 is connected to the first abutment plate 141, and the other end of the fourth camshaft 148 may pass through the fourth elastic element 149 and the first connecting plate 114, and sequentially pass through the first synchronizing gear 183, the damping bracket 131, the second synchronizing gear 193, the second connecting plate 124, and the limiting piece 15, and be fixed to the limiting piece 15. The third elastic element 147 and the fourth elastic element 149 are respectively sleeved on the third camshaft 146 and the fourth camshaft 148. The two ends of the third elastic element 147 elastically abut against the side of the first connecting plate 114 opposite to the third cam 1133 and the first abutting plate 141, respectively. The two ends of the fourth elastic element 149 elastically abut against the side of the first connecting plate 114 opposite to the fourth cam 1135 and the first abutting plate 141, respectively.

[0084] Specifically, the limiting piece 15 is further provided with a third slot 153 and a fourth slot 154. The second end of the third camshaft 146 can sequentially pass through the first abutment plate 141, the third elastic element 147, the first connecting plate 114, the first synchronous gear 183, the damping bracket 131, the second synchronous gear 193, the second connecting plate 124, and the third slot 153, and is fixed within the third slot 153. The fourth camshaft 148 can sequentially pass through the first abutment plate 141, the fourth elastic element 149, the first connecting plate 114, the first synchronous gear 183, the damping bracket 131, the second synchronous gear 193, the second connecting plate 124, and the fourth slot 154, and is fixed within the fourth slot 154.

[0085] In this embodiment, both the third elastic element 147 and the fourth elastic element 149 can be energy storage springs.

[0086] It is understood that in some embodiments, the first camshaft 142 may pass through the first connecting rod 111 and the third connecting rod 121, and the first camshaft 142 may also pass through the first cam 1132 and the damping bracket 131. The second camshaft 144 may pass through the second connecting rod 112 and the fourth connecting rod 122, and the second camshaft 144 may also pass through the second cam 1134 and the damping bracket 131.

[0087] Please see Figure 5 This is a schematic diagram of the folding hinge structure 10 provided in another embodiment of this application.

[0088] and Figure 2 The difference between the embodiment of the folding hinge structure 10 shown is that, as Figure 5 As shown, in this embodiment, the second connecting plate 124, the third connecting rod 121, and the fourth connecting rod 122 do not have mutually meshing cam structures. The damping bracket 131 can rotate under the action of elasticity, generating a certain frictional damping force, thereby ensuring that damping force is generated within a set angle. In this embodiment, the folding pivot structure 10 can use fewer structural components, providing a damping feel for the user, and has a simple structure.

[0089] Please see Figure 6 This is a schematic diagram of the folding hinge structure 10 provided in another embodiment of this application.

[0090] and Figures 2 to 4 The difference between the embodiment of the folding hinge structure 10 shown is that, as Figure 6As shown, in this embodiment, the first connecting plate 114, the first connecting rod 111, and the second connecting rod 112 do not have mutually meshing cam structures. The damping bracket 131 can rotate under the action of elasticity to generate a certain frictional damping force, thereby ensuring that damping force is generated within a set angle. In this embodiment, the folding pivot structure 10 can use fewer structural components, providing users with a damping feel, and has a simple structure.

[0091] Please see Figure 7 This is a schematic diagram of the folding hinge structure 10 provided in another embodiment of this application.

[0092] and Figure 2 The difference between the embodiment of the folding pivot structure 10 shown is that, in this embodiment, the elastic drive assembly 14 may further include a fifth elastic element 1410, a sixth elastic element 1411, a seventh elastic element 1412, an eighth elastic element 1413, and a second abutment plate (not shown in the figure).

[0093] like Figure 7 As shown, in this embodiment, the fifth elastic element 1410 is sleeved on the first camshaft 142, the sixth elastic element 1411 is sleeved on the second camshaft 144, the seventh elastic element 1412 is sleeved on the third camshaft 146, and the eighth elastic element 1413 is sleeved on the fourth camshaft 148.

[0094] The two ends of the fifth elastic member 1410 elastically abut against the side of the second connecting plate 124 opposite to the seventh cam 1233 and the second abutting plate, respectively, to abut against the limiting piece 15. The two ends of the sixth elastic member 1411 elastically abut against the side of the second connecting plate 124 opposite to the eighth cam 1235 and the second end of the second camshaft 144, respectively.

[0095] The two ends of the seventh elastic member 1412 elastically abut against the side of the second connecting plate 124 opposite to the seventh cam 1233 and the second abutting plate, respectively, to abut against the limiting piece 15. The two ends of the eighth elastic member 1413 elastically abut against the side of the second connecting plate 124 opposite to the eighth cam 1235 and the second connecting plate, respectively, to abut against the limiting piece 15. In this embodiment, the fifth elastic member 1410, the sixth elastic member 1411, the seventh elastic member 1412, and the eighth elastic member 1413 can all be energy storage springs.

[0096] Please see Figure 8 and Figure 9 This is a schematic diagram of the folding hinge structure 10 provided in another embodiment of this application.

[0097] and Figure 2 The difference between the embodiment of the folding pivot structure 10 shown is that the damping assembly 13 in this embodiment includes a damping bracket 131 and a third cam group 132.

[0098] In this embodiment, the damping bracket 131 has a ninth cam 1321 and a tenth cam 1323 at both ends. The third cam group 132 may include an eleventh cam 1322 opposite to the ninth cam 1321 and a twelfth cam 1324 opposite to the tenth cam 1323. The ninth cam 1321 and the eleventh cam 1322 are both sleeved on the first camshaft 142. The tenth cam 1323 and the twelfth cam 1324 are both sleeved on the second camshaft 144.

[0099] It is understood that the ninth cam 1321 and the tenth cam 1323 are fixed to both ends of the damping bracket 131. The second end of the third link 121 is fixed with the eleventh cam 1322, which rotates coaxially with the third link 121. The second end of the fourth link 122 is fixed with the twelfth cam 1324, which rotates coaxially with the fourth link 122. The damping bracket 131 is sleeved on the third camshaft 146 and the fourth camshaft 148. The damping bracket 131 is positioned close to the first cam link assembly 11.

[0100] like Figure 9 As shown, in this embodiment, the damping bracket 131 has an eleventh cam 1322 and a twelfth cam 1324 at both ends. The third cam group 132 may include a ninth cam 1321 opposite to the eleventh cam 1322 and a tenth cam 1323 opposite to the twelfth cam 1324, and the eleventh cam 1322 and the twelfth cam 1324 are fixed to both ends of the damping bracket 131. The second end of the first connecting rod 111 is fixed with the ninth cam 1321, which rotates coaxially with the first connecting rod 111, and the second end of the second connecting rod 112 is fixed with the tenth cam 1323, which rotates coaxially with the second connecting rod 112. The damping bracket 131 is sleeved on the third camshaft 146 and the fourth camshaft 148. The damping bracket 131 is disposed close to the second cam connecting rod assembly 12.

[0101] Please see Figure 10 This is a schematic diagram of the folding hinge structure 10 provided in another embodiment of this application.

[0102] and Figure 8 The difference between the embodiment of the folding hinge structure 10 shown is that, as Figure 10As shown, in this embodiment, the third cam group 132 includes a ninth cam 1321, a tenth cam 1323, a fifteenth cam 1332, a sixteenth cam 1334, and a damping bracket 131. The damping bracket 131 has a first double-sided cam and a second double-sided cam at its two ends, respectively. The first double-sided cam and the second double-sided cam are fixed to the two ends of the damping bracket 131. The first camshaft 142 can pass through the first double-sided cam, and the second camshaft 144 can pass through the second double-sided cam. The first double-sided cam may include an eleventh cam 1322 and a thirteenth cam 1331, and the second double-sided cam may include a twelfth cam 1324 and a fourteenth cam 1333.

[0103] The ninth cam 1321 is positioned opposite to the eleventh cam 1322, the thirteenth cam 1331 is positioned opposite to the fifteenth cam 1332, the tenth cam 1323 is positioned opposite to the twelfth cam 1324, and the fourteenth cam 1333 is positioned opposite to the sixteenth cam 1334.

[0104] In this embodiment, the ninth cam 1321, the eleventh cam 1322, the thirteenth cam 1331 and the fifteenth cam 1332 are all mounted on the first camshaft 142, and the tenth cam 1323, the twelfth cam 1324, the fourteenth cam 1333 and the sixteenth cam 1334 are all mounted on the second camshaft 144.

[0105] The ninth cam 1321 meshes with the eleventh cam 1322, and the tenth cam 1323 meshes with the twelfth cam 1324. The thirteenth cam 1331 meshes with the fifteenth cam 1332, and the fourteenth cam 1333 meshes with the sixteenth cam 1334. The damping bracket 131 is sleeved on the third camshaft 146 and the fourth camshaft 148. The eleventh cam 1322 and the thirteenth cam 1331 are fixed to the first end of the damping bracket 131, and the twelfth cam 1324 and the fourteenth cam 1333 are fixed to the second end of the damping bracket 131.

[0106] based on Figures 8 to 10 The illustrated embodiment can achieve greater torque within a limited space. If the space of the folding electronic device 100 is limited, and the elasticity of the elastic element is limited, greater rotational holding force and self-flattening or self-closing drive torque can be achieved by increasing the number of concave cam pairs.

[0107] Please see Figure 11 This is a schematic diagram of the folding hinge structure 10 provided in another embodiment of this application. Figure 2The difference between the embodiment of the folding pivot structure 10 shown is that the damping component 13 in this embodiment may include a damping bracket 131, a first friction plate 134, a second friction plate 135 and a third friction plate 136.

[0108] The first friction plate 134 is sleeved on the first camshaft 142, the second camshaft 144, the third camshaft 146, and the fourth camshaft 148, and is positioned close to the first drive gear 181 and the second drive gear 182, meaning the first friction plate 134 is a static friction plate. The first end of the second friction plate 135 is sleeved on the first connecting rod pin 16, and the second end of the second friction plate 135 is sleeved on the first camshaft 142, with the second end located between the first friction plate 134 and the damping bracket 131. That is, the second friction plate 135 is a dynamic friction plate and can rotate coaxially with the first connecting rod 111.

[0109] The first end of the third friction plate 136 is sleeved on the second connecting rod pin 17, and the second end of the third friction plate 136 is sleeved on the second camshaft 144, with the second end of the third friction plate 136 located between the first friction plate 134 and the damping bracket 131. That is, the third friction plate 136 is a moving friction plate and can rotate coaxially with the second connecting rod 112.

[0110] Furthermore, in this embodiment, the damping assembly 13 may further include a fourth friction plate, a fifth friction plate, and a sixth friction plate. Specifically, a fourth friction plate may be disposed between the first friction plate 134 and the first cam connecting rod assembly 11. The first end of the fifth friction plate is sleeved on the first connecting rod pin 16, and the second end of the fifth friction plate may be sleeved on the first camshaft 142, with the second end of the fourth friction plate located between the first friction plate 134 and the fifth friction plate. The first end of the sixth friction plate may be sleeved on the second connecting rod pin 17, and the second end of the sixth friction plate may be sleeved on the second camshaft 144, with the second end of the sixth friction plate located between the first friction plate 134 and the fourth friction plate.

[0111] Please see Figure 12 This is a schematic diagram of the folding hinge structure 10 provided in another embodiment of this application. Figure 11The difference in the embodiment of the folding pivot structure 10 shown is that the first friction plate 134 is positioned close to the third drive gear 191 and the fourth drive gear 192. The first end of the second friction plate 135 is sleeved on the first connecting rod pin 16, and the second end of the second friction plate 135 is sleeved on the first camshaft 142, with the second end of the second friction plate 135 located between the first friction plate 134 and the damping bracket 131. That is, the second friction plate 135 is a moving friction plate and can rotate coaxially with the first connecting rod 111. The first end of the third friction plate 136 is sleeved on the second connecting rod pin 17, and the second end of the third friction plate 136 is sleeved on the second camshaft 144, with the second end of the third friction plate 136 located between the first friction plate 134 and the damping bracket 131. That is, the third friction plate 136 is a moving friction plate and can rotate coaxially with the second connecting rod 112.

[0112] Please see Figure 13 This is a schematic diagram of the folding hinge structure 10 provided in another embodiment of this application. Figure 11 The difference between the embodiment of the folding pivot structure 10 shown is that, in this embodiment, the damping component 13 may further include a fourth friction plate 137, a fifth friction plate 138, and a sixth friction plate 139.

[0113] The fourth friction plate 137 is sleeved on the first camshaft 142, the second camshaft 144, the third camshaft 146, and the fourth camshaft 148, and is positioned close to the third drive gear 191 and the fourth drive gear 192. The first end of the fifth friction plate 138 is sleeved on the first connecting rod pin 16, and the second end of the fifth friction plate 138 is sleeved on the first camshaft 142, with the second end located between the fourth friction plate and the damping bracket 131. The first end of the sixth friction plate 139 is sleeved on the second connecting rod pin 17, and the second end of the sixth friction plate 139 is sleeved on the second camshaft 144, with the second end located between the fourth friction plate 137 and the damping bracket 131.

[0114] based on Figures 11 to 12 In the illustrated embodiment, when the elastic force of the elastic element is limited, a greater intermediate hovering force can be achieved by increasing the logarithm of the friction pair.

[0115] Please see Figure 14 This is a schematic diagram of the folding hinge structure 10 provided in another embodiment of this application. Figure 8The difference between the embodiment of the folding pivot structure 10 shown is that, in this embodiment, the damping component 13 may further include a first friction plate 134, a second friction plate 135, and a third friction plate 136.

[0116] The first friction plate 134 is sleeved on the first camshaft 142, the second camshaft 144, the third camshaft 146, and the fourth camshaft 148, and is positioned close to the first drive gear 181 and the second drive gear 182. The first end of the second friction plate 135 is sleeved on the first connecting rod pin 16, and the second end of the second friction plate 135 is sleeved on the first camshaft 142, with the second end located between the first friction plate 134 and the ninth cam 1321, which is sleeved on the first camshaft 142. The first end of the third friction plate 136 is sleeved on the second connecting rod pin 17, and the second end of the third friction plate 136 is sleeved on the second camshaft 144, with the second end located between the tenth cam 1323 and the first friction plate 134.

[0117] Please see Figure 15 This is a schematic diagram of the folding hinge structure 10 provided in another embodiment of this application. Figure 14 The difference in the embodiment of the folding pivot structure 10 shown is that, in this embodiment, the first friction plate 134 is disposed close to the third drive gear 191 and the fourth drive gear 192. The first friction plate 134 is sleeved on the first camshaft 142, the second camshaft 144, the third camshaft 146, and the fourth camshaft 148.

[0118] The first end of the second friction plate 135 is sleeved on the first connecting rod pin 16, the second end of the second friction plate 135 is sleeved on the first camshaft 142, and the second end of the second friction plate 135 is located between the first friction plate 134 and the eleventh cam 1322.

[0119] The first end of the third friction plate 136 is sleeved on the second connecting rod pin 17, the second end of the third friction plate 136 is sleeved on the second camshaft 144, and the second end of the third friction plate 136 is located between the twelfth cam 1324 and the first friction plate 134.

[0120] In one embodiment, such as Figure 16As shown, both the first camshaft 142 and the second camshaft 144 can be flat shafts or irregularly shaped shafts. In other possible embodiments, the third camshaft 146 and the fourth camshaft 148 can also be flat shafts or irregularly shaped shafts, that is, the shaft holes of the first cam 1132, the second cam 1134, and the first synchronizing gear 183 are all flat holes or irregularly shaped holes. Based on this design, it can be ensured that when the first connecting rod 111 rotates, it can drive the first camshaft 142, the second camshaft 144, the third camshaft 146, and the fourth camshaft 148 to rotate together.

[0121] Please see Figure 17 This is a schematic diagram of the folding hinge structure 10 provided in another embodiment of this application.

[0122] and Figure 7 The difference between the embodiment of the folding pivot structure 10 shown is that, in this embodiment, the damping assembly 13 includes a damping bracket 131, a first friction plate 134, a second friction plate 135, and a third friction plate 136.

[0123] A second friction plate 135 and a third friction plate 136 are fitted onto the first end of the first camshaft 142, the first end of the second camshaft 144, the first end of the third camshaft 146, and the first end of the fourth camshaft 148. The first ends of the first elastic member 143, the second elastic member 145, the third elastic member 147, and the fourth elastic member 149 elastically abut against the third friction plate 136. A first friction plate 134 is respectively fitted onto the first end of the first camshaft 142, the first end of the second camshaft 144, the first end of the third camshaft 146, and the first end of the fourth camshaft 148, with the first friction plate 134 located between the second friction plate 135 and the third friction plate 136.

[0124] A second friction plate 135 and a third friction plate 136 are fitted onto the second ends of the first camshaft 142, the second camshaft 144, the third camshaft 146, and the fourth camshaft 148, respectively. The first ends of the fifth elastic member 1410, the sixth elastic member 1411, the seventh elastic member 1412, and the eighth elastic member 1413 elastically abut against the third friction plate 136. A first friction plate 134 is fitted onto the second ends of the first camshaft 142, the second camshaft 144, the third camshaft 146, and the fourth camshaft 148, respectively, with the first friction plate 134 located between the second friction plate 135 and the third friction plate 136.

[0125] In some possible embodiments, the second friction plate 135 may be a first abutment plate. In other possible embodiments, a first abutment plate 141 may be added between the second friction plate 135 and the first end of the first camshaft 142, the second camshaft 144, the third camshaft 146, and the fourth camshaft 148. Alternatively, a first abutment plate 141 may be added between the third friction plate 136 and the first elastic member 143, the second elastic member 145, the third elastic member 147, and the fourth elastic member 149.

[0126] Based on this design, at the distal end of the elastic element, there are a second friction plate 135 and a third friction plate 136 as static friction plates, and a first friction plate 134 as a dynamic friction plate. These plates can rotate together with the first camshaft 142, the second camshaft 144, the third camshaft 146, and the fourth camshaft 148. This design enhances rotational damping force, achieves the requirement of intermediate suspension during rotation, and provides the user with a damping feel.

[0127] It is understood that in this embodiment, the folding pivot structure 10 may have multiple friction pads on both sides. In some other possible embodiments, the folding pivot structure 10 may also have multiple friction pads on one side.

[0128] Please see Figure 18 This is a schematic diagram of the folding hinge structure 10 provided in another embodiment of this application.

[0129] and Figure 17 The difference in the embodiment of the folding pivot structure 10 shown is that, in this embodiment, the damping assembly 13 further includes a third cam group 132.

[0130] In this embodiment, the third cam group 132 may include a engaged ninth cam 1321, an eleventh cam 1322 opposite to the ninth cam 1321, an engaged tenth cam 1323, and a twelfth cam 1324 opposite to the tenth cam 1323. The ninth cam 1321 and the eleventh cam 1322 are both mounted on the first camshaft 142. The tenth cam 1323 and the twelfth cam 1324 are both mounted on the second camshaft 144.

[0131] It is understood that the ninth cam 1321 is fixed to the first end of the damping bracket 131, and the tenth cam 1323 is fixed to the second end of the damping bracket 131. The second end of the third link 121 is fixed with the eleventh cam 1322, which rotates coaxially with the third link 121. The second end of the fourth link 122 is fixed with the twelfth cam 1324, which rotates coaxially with the fourth link 122. The damping bracket 131 is sleeved on the third camshaft 146 and the fourth camshaft 148. The damping bracket 131 is positioned close to the first cam link assembly 11. Figure 19 As shown, in another embodiment, the damping bracket 131 may be positioned close to the second cam link assembly 12. The eleventh cam 1322 is fixed to the first end of the damping bracket 131, and the twelfth cam 1324 is fixed to the second end of the damping bracket 131. The second end of the first link 111 is fixed with the ninth cam 1321, which rotates coaxially with the first link 111, and the second end of the second link 112 is fixed with the tenth cam 1323, which rotates coaxially with the second link 112. The damping bracket 131 is sleeved on the third camshaft 146 and the fourth camshaft 148.

[0132] Please see Figure 20 This is a schematic diagram of the folding hinge structure 10 provided in another embodiment of this application.

[0133] and Figure 18 The difference between the embodiment of the folding hinge structure 10 shown is that, in this embodiment, as Figure 20 As shown, the folding shaft structure 10 in this embodiment further includes a fourth cam group 133, which may include a thirteenth cam 1331 engaged with the thirteenth cam 1331, a fifteenth cam 1332 disposed opposite to the thirteenth cam 1331, a fourteenth cam 1333 engaged with the fourteenth cam 1333, and a sixteenth cam 1334 disposed opposite to the fourteenth cam 1333.

[0134] In this embodiment, the ninth cam 1321, the eleventh cam 1322, the thirteenth cam 1331 and the fifteenth cam 1332 are all mounted on the first camshaft 142, and the tenth cam 1323, the twelfth cam 1324, the fourteenth cam 1333 and the sixteenth cam 1334 are all mounted on the second camshaft 144.

[0135] The ninth cam 1321 meshes with the eleventh cam 1322, and the tenth cam 1323 meshes with the twelfth cam 1324. The thirteenth cam 1331 meshes with the fifteenth cam 1332, and the fourteenth cam 1333 meshes with the sixteenth cam 1334. The damping bracket 131 is sleeved on the third camshaft 146 and the fourth camshaft 148. The eleventh cam 1322 and the thirteenth cam 1331 are fixed to the first end of the damping bracket 131, and the twelfth cam 1324 and the fourteenth cam 1333 are fixed to the second end of the damping bracket 131.

[0136] based on Figures 17 to 20 In the illustrated embodiment, when the strength of the moving friction plate is limited, the opening and closing torque is adjusted by setting a friction pair at the far end in conjunction with the number of concave cam pairs, which simplifies the transmission mechanism and improves space utilization.

[0137] Please see Figure 21 This is a schematic diagram of the folding hinge structure 10 provided in another embodiment of this application.

[0138] and Figure 2 The difference between the embodiment of the folding hinge structure 10 shown is that:

[0139] In this embodiment, the folding pivot structure 10 may include a first cam link assembly 11, a second cam link assembly 12, an elastic drive assembly 14, a limiting piece 15, a first link pin 16, a second link pin 17, a first synchronization assembly 18, and a second synchronization assembly 19.

[0140] The first cam link assembly 11 may include a first link 111, a second link 112, a first cam group 113, and a first connecting plate 114. The first cam group 113 may include a first cam 1132 engaged with the first cam 1132 and a third cam 1133 disposed opposite to the first cam 1132. The first cam group 113 may also include a second cam 1134 engaged with the second cam 1134 and a fourth cam 1135 disposed opposite to the second cam 1134. The third cam 1133 may be disposed at the first end of the first connecting plate 114, and the fourth cam 1135 may be disposed at the second end of the first connecting plate 114.

[0141] The second cam link assembly 12 may include a third link 121, a fourth link 122, a second cam group 123, and a second connecting plate 124. The second cam group 123 may include a engaged fifth cam 1232 and a seventh cam 1233 opposite to the fifth cam 1232. The second cam group 123 may also include an engaged sixth cam 1234 and an eighth cam 1235 opposite to the sixth cam 1234. The fifth cam 1232 may be located at the first end of the second connecting plate 124, and the sixth cam 1234 may be located at the second end of the second connecting plate 124.

[0142] The first connecting rod 111 is fixedly connected to the third connecting rod 121 via the first connecting rod pin 16, and the second connecting rod 112 is fixedly connected to the fourth connecting rod 122 via the second connecting rod pin 17.

[0143] The second end of the first connecting rod 111 is fixed with a first cam 1132 that rotates coaxially with the first connecting rod 111. The second end of the second connecting rod 112 is fixed with a second cam 1134 that rotates coaxially with the second connecting rod 112. Both the first cam 1132 and the second cam 1134 are located on the same side of the first cam-link assembly 11. The second end of the third connecting rod 121 is fixed with a seventh cam 1233 that rotates coaxially with the third connecting rod 121. The second end of the fourth connecting rod 122 is fixed with an eighth cam 1235 that rotates coaxially with the fourth connecting rod 122. Both the seventh cam 1233 and the eighth cam 1235 are located on the same side of the second cam-link assembly 12.

[0144] The elastic drive assembly 14 includes a first camshaft 142, a first elastic element 143, a second camshaft 144, and a second elastic element 145. One end of the first camshaft 142 can be connected to the limiting piece 15, and the other end of the first camshaft 142 can pass through the axis of the first cam 1132 and connect to the axis of the third cam 1133. It then sequentially passes through the first connecting plate 114, the first elastic element 143, the second connecting plate 124, the fifth cam 1232, and the seventh cam 1233 and connects to another limiting piece 15. One end of the second camshaft 144 is connected to the limiting piece 15, and the other end of the second camshaft 144 can pass through the axis of the second cam 1134 and connect to the axis of the fourth cam 1135. It then sequentially passes through the first connecting plate 114, the second elastic element 145, the second connecting plate 124, the sixth cam 1234, and the eighth cam 1235 and connects to another limiting piece 15. The two ends of the first elastic member 143 elastically abut against the side of the first connecting plate 114 opposite to the third cam 1133 and the side of the second connecting plate 124 opposite to the fifth cam 1232, respectively. The two ends of the second elastic member 145 elastically abut against the side of the first connecting plate 114 opposite to the third cam 1133 and the side of the second connecting plate 124 opposite to the fifth cam 1232, respectively.

[0145] The first synchronization component 18 may include a first drive gear 181, a second drive gear 182, and an even number of first synchronization gears 183. The first drive gear 181 is fixed to the second end of the first connecting rod 111, and is disposed on the surface of the third cam 1133 opposite to the first cam 1132 and sleeved on the first camshaft 142. The second drive gear 182 is fixed to the second end of the second connecting rod 112, and may be disposed on the surface of the fourth cam 1135 opposite to the second cam 1134 and sleeved on the second camshaft 144. The first synchronization gears 183 may be disposed between the first drive gear 181 and the second drive gear 182. In this application scenario, adjacent first drive gears 181, first synchronization gears 183, and second drive gears 182 can mesh with each other.

[0146] The second synchronization component 19 may include a third drive gear 191, a fourth drive gear 192, and an even number of second synchronization gears 193. The third drive gear 191 is fixed to the second end of the third connecting rod 121 and can be sleeved on the first camshaft 142. The fourth drive gear 192 is fixed to the second end of the fourth connecting rod 122 and can be sleeved on the second camshaft 144. In this application scenario, the third drive gear 191 and the fourth drive gear 192 can mesh with each other. A second synchronization gear 193 can be disposed between the third drive gear 191 and the fourth drive gear 192. In this application scenario, adjacent third drive gears 191, second synchronization gears 193, and fourth drive gears 192 can mesh with each other.

[0147] In some possible implementations, the elastic drive assembly 14 may further include a third camshaft 146, a third elastic element 147, a fourth camshaft 148, and a fourth elastic element 149. The third elastic element 147 and the fourth elastic element 149 are respectively sleeved on the third camshaft 146 and the fourth camshaft 148.

[0148] One end of the third camshaft 146 can be connected to the limiting piece 15, and the other end of the third camshaft 146 can sequentially pass through the first synchronizing gear 183, the first connecting plate 114, the third elastic element 147, the second connecting plate 124, and the second synchronizing gear 193 to connect to another limiting piece 15. One end of the fourth camshaft 148 is connected to the limiting piece 15, and the other end of the fourth camshaft 148 can sequentially pass through the first synchronizing gear 183, the first connecting plate 114, the third elastic element 147, the second connecting plate 124, and the second synchronizing gear 193 to connect to another limiting piece 15. The two ends of the third elastic element 147 elastically abut against the side of the first connecting plate 114 opposite to the third cam 1133 and the side of the second connecting plate 124 opposite to the fifth cam 1232, respectively. The two ends of the fourth elastic member 149 elastically abut against the side of the first connecting plate 114 opposite to the fourth cam 1135 and the side of the second connecting plate 124 opposite to the sixth cam 1234, respectively.

[0149] In this embodiment, the limiting plate 15 will not rotate with the rotation of the first link 111 and the second link 112, and the other limiting plate 15 will not rotate with the rotation of the third link 121 and the fourth link 122. Based on this design, a friction pair can be generated between the limiting plate 15 and the first link 111 and the second link 112, generating a damping force. Similarly, the other limiting plate 15 can also generate a friction pair with the third link 121 and the fourth link 122, generating a damping force.

[0150] In another possible embodiment, a friction pair may be provided between the limiting plate 15 and the first cam link assembly 11, and a friction pair may also be provided between the limiting plate 15 and the second cam link assembly 12. Based on this design, the friction damping force can be further improved, and the damping effect can be enhanced.

[0151] based on Figure 21 In the embodiment shown, the elastic drive component 14 can be positioned in the middle of the folding pivot structure, and the first connecting plate 114 and the second connecting plate 124 can move toward the middle position. Based on this design, a damping effect can also be provided to the user when opening and closing.

[0152] The folding hinge structure and folding electronic device provided in this application exhibit friction between 0 and 180°, enabling damping at specific angles. They can automatically flatten and maintain a flattened state when approaching 180°, automatically close and maintain a closed state when approaching 0°, and freely hover within the intermediate angle of 0-180°. The folding hinge structure and folding electronic device provided in this application embodiment offer a damping effect to the user during opening and closing, and the folding hinge structure has a wide range of applications.

[0153] The above description is merely a preferred embodiment of this application and is not intended to limit this application in any way. Although the preferred embodiment has been disclosed above, it is not intended to limit this application. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of this application. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A folding hinge structure, characterized in that, include: The first cam link assembly includes a first link and a second link symmetrically arranged, the first link and the second link being rotatable relative to each other; it also includes a first cam group; the first cam group includes a first cam, a third cam, a second cam, and a fourth cam, which are arranged opposite to the first cam; Wherein, the second end of the first connecting rod is fixed with the third cam that rotates coaxially with the first connecting rod, the second end of the second connecting rod is fixed with the fourth cam that rotates coaxially with the second connecting rod, and the third cam and the fourth cam are located on the same side of the first cam-link assembly; the first cam and the second cam do not rotate with the first connecting rod and the second connecting rod; The second cam link assembly includes a symmetrically arranged third link and a fourth link, which are rotatable relative to each other. The third link rotates coaxially with the first link, and the fourth link rotates coaxially with the second link. The first end of the third link is fixedly connected to the first end of the first link via a first link pin, and the first end of the fourth link is fixedly connected to the first end of the second link via a second link pin. The first synchronization component includes a first drive gear and a second drive gear. The first drive gear is fixed to the second end of the first connecting rod and is disposed on the surface of the third cam opposite to the first cam. The second drive gear is fixed to the second end of the second connecting rod and is disposed on the surface of the fourth cam opposite to the second cam. The first drive gear and the second drive gear mesh with each other. The second synchronization component includes a third drive gear and a fourth drive gear. The third drive gear is fixed to the second end of the third connecting rod, and the fourth drive gear is fixed to the second end of the fourth connecting rod. The third drive gear and the fourth drive gear mesh with each other. An elastic drive assembly is used to provide an elastic drive force to bring the first cam and the third cam, and the second cam and the fourth cam, closer to each other in the direction of the rotation axis that allows the first link and the second link to be rotatably connected; The damping assembly includes a damping bracket disposed between the first cam link assembly and the second cam link assembly, and rotates under the action of elastic force to generate frictional damping force.

2. The folding hinge structure as described in claim 1, characterized in that, The elastic drive assembly includes a first abutment plate, a first camshaft, a first elastic element, a second camshaft, and a second elastic element; The first camshaft passes through the first connecting rod and the third connecting rod, and the second camshaft passes through the second connecting rod and the fourth connecting rod, so that the first connecting rod and the second connecting rod rotate relative to each other, and the third connecting rod and the fourth connecting rod rotate relative to each other; The first camshaft also has the first cam and the damping bracket passing through it, and the second camshaft also has the second cam and the damping bracket passing through it; The first abutment plate is located at the end of the first camshaft and the second camshaft away from the first cam and the second cam; The first elastic element is sleeved on the first camshaft, and the two ends of the first elastic element elastically abut against the side of the first cam that is away from the third cam and the first abutment plate, respectively. The second elastic element is sleeved on the second camshaft, and the two ends of the second elastic element elastically abut against the side of the second cam that is away from the fourth cam and the first abutment plate, respectively.

3. The folding hinge structure as described in claim 2, characterized in that, The second cam link assembly further includes a second cam group, and the folding pivot structure further includes a limiting piece. The second cam group includes a fifth cam, a seventh cam, a sixth cam, and an eighth cam opposite to the fifth cam. The second end of the third link is fixed with the seventh cam, which rotates coaxially with the third link. The second end of the fourth link is fixed with the eighth cam, which rotates coaxially with the fourth link. The seventh cam and the eighth cam are located on the same side of the second cam link assembly. The fifth cam and the sixth cam do not rotate with the third link and the fourth link. The limiting piece is located at the end of the first camshaft and the second camshaft away from the fifth cam and the sixth cam, and the sides of the fifth cam and the sixth cam opposite to the seventh cam and the eighth cam both abut against the limiting piece.

4. The folding hinge structure as described in claim 3, characterized in that, The first synchronization component further includes two first synchronization gears, which are disposed between the first drive gear and the second drive gear, and adjacent first drive gears, the two first synchronization gears, and the second drive gear mesh with each other; The second synchronization component further includes two second synchronization gears, which are disposed between the third drive gear and the fourth drive gear, and adjacent third drive gears, the two second synchronization gears, and the fourth drive gear mesh with each other.

5. The folding hinge structure as described in claim 4, characterized in that, The first cam and the second cam are fixedly connected by a first connecting plate or integrally formed, and the fifth cam and the sixth cam are fixedly connected by a second connecting plate or integrally formed; The elastic drive assembly further includes a third camshaft, a third elastic element, a fourth camshaft, and a fourth elastic element; The third camshaft passes through the first connecting plate, a first synchronizing gear, the damping bracket, a second synchronizing gear, and the second connecting plate; The fourth camshaft passes through the first connecting plate, another first synchronizing gear, the damping bracket, another second synchronizing gear, and the second connecting plate; The third elastic element is sleeved on the third camshaft, and the two ends of the third elastic element elastically abut against the side of the first connecting plate opposite to the third camshaft and the abutment plate, respectively. The fourth elastic element is sleeved on the fourth camshaft, and the two ends of the fourth elastic element elastically abut against the side of the first connecting plate opposite to the fourth camshaft and the abutment plate, respectively.

6. The folding hinge structure as described in claim 5, characterized in that, The damping assembly further includes a third cam group, the damping bracket includes a ninth cam and a tenth cam, the third cam group includes an eleventh cam and a twelfth cam opposite to the ninth cam; the ninth cam and the eleventh cam are both sleeved on the first camshaft, the tenth cam and the twelfth cam are both sleeved on the second camshaft, the ninth cam meshes with the eleventh cam, and the tenth cam meshes with the twelfth cam; The ninth cam and the tenth cam are fixed to both ends of the damping bracket, the first camshaft passes through the ninth cam, and the second camshaft passes through the tenth cam; The second end of the third link is fixed with the eleventh cam that rotates coaxially with the third link, and the second end of the fourth link is fixed with the twelfth cam that rotates coaxially with the fourth link; or, the second end of the first link is fixed with the eleventh cam that rotates coaxially with the first link, and the second end of the second link is fixed with the twelfth cam that rotates coaxially with the second link.

7. The folding hinge structure as described in claim 5, characterized in that, The damping assembly further includes a third cam group, which includes a ninth cam, a tenth cam, a fifteenth cam, and a sixteenth cam. The damping bracket includes a first double-sided cam and a second double-sided cam. The first double-sided cam is located between the ninth cam and the fifteenth cam, and the second double-sided cam is located between the tenth cam and the sixteenth cam. The first double-sided cam includes an eleventh cam opposite to the ninth cam and a thirteenth cam opposite to the fifteenth cam. The second double-sided cam includes a twelfth cam opposite to the tenth cam and a fourteenth cam opposite to the sixteenth cam. The ninth cam, the eleventh cam, the thirteenth cam, and the fifteenth cam are all sleeved on the first camshaft, and the tenth cam, the twelfth cam, the fourteenth cam, and the sixteenth cam are all sleeved on the second camshaft. The first double-sided cam and the second double-sided cam are fixed at both ends of the damping bracket. The first cam shaft passes through the first double-sided cam, and the second cam shaft passes through the second double-sided cam. The ninth cam meshes with the eleventh cam, the tenth cam meshes with the twelfth cam, the thirteenth cam meshes with the fifteenth cam, and the fourteenth cam meshes with the sixteenth cam. The second end of the first connecting rod is fixed with the ninth cam, which rotates coaxially with the first connecting rod; the second end of the second connecting rod is fixed with the tenth cam, which rotates coaxially with the second connecting rod; the second end of the third connecting rod is fixed with the fifteenth cam, which rotates coaxially with the third connecting rod; and the second end of the fourth connecting rod is fixed with the sixteenth cam, which rotates coaxially with the fourth connecting rod.

8. The folding hinge structure as described in claim 5, characterized in that, The damping assembly further includes a first friction plate, a second friction plate, and a third friction plate; the first friction plate is sleeved on the first camshaft, the second camshaft, the third camshaft, and the fourth camshaft, and is positioned close to the first drive gear and the second drive gear; the first end of the second friction plate is sleeved on the first connecting rod pin, the second end of the second friction plate is sleeved on the first camshaft, and the second end of the second friction plate is located between the first friction plate and the damping bracket; the first end of the third friction plate is sleeved on the second connecting rod pin, the second end of the third friction plate is sleeved on the second camshaft, and the second end of the third friction plate is located between the first friction plate and the damping bracket.

9. The folding hinge structure as described in claim 8, characterized in that, The damping assembly further includes a fourth friction plate, a fifth friction plate, and a sixth friction plate; the fourth friction plate is sleeved on the first camshaft, the second camshaft, the third camshaft, and the fourth camshaft; the fourth friction plate is positioned close to the third drive gear and the fourth drive gear; the first end of the fifth friction plate is sleeved on the first connecting rod pin, the second end of the fifth friction plate is sleeved on the first camshaft, and the second end of the fifth friction plate is located between the fourth friction plate and the damping bracket; the first end of the sixth friction plate is sleeved on the second connecting rod pin, the second end of the sixth friction plate is sleeved on the second camshaft, and the second end of the sixth friction plate is located between the fourth friction plate and the damping bracket.

10. The folding hinge structure as described in claim 5, characterized in that, The elastic drive assembly further includes a fifth elastic element, a sixth elastic element, and a second abutment plate; The fifth elastic element is sleeved on the first camshaft, and the two ends of the fifth elastic element elastically abut against the side of the fifth cam opposite to the seventh cam and the second abutment plate to abut against the limiting piece; The sixth elastic element is sleeved on the second camshaft, and the two ends of the sixth elastic element elastically abut against the side of the sixth cam opposite to the eighth cam and the second abutment plate to abut against the limiting piece.

11. The folding hinge structure as described in claim 5, characterized in that, The elastic drive assembly further includes a fifth elastic element, a sixth elastic element, a seventh elastic element, an eighth elastic element, and a second abutment plate; The fifth elastic element is sleeved on the first camshaft, and the two ends of the fifth elastic element elastically abut against the side of the fifth cam opposite to the seventh cam and the second abutment plate, respectively, so as to abut against the limiting piece; The sixth elastic element is sleeved on the second camshaft, and the two ends of the sixth elastic element elastically abut against the side of the sixth cam opposite to the eighth cam and the second abutment plate to abut against the limiting piece. The seventh elastic element is sleeved on the third camshaft, and the two ends of the seventh elastic element elastically abut against the side of the second connecting plate opposite to the seventh cam and the second abutting plate to abut against the limiting piece; The eighth elastic element is sleeved on the fourth camshaft, and the two ends of the eighth elastic element elastically abut against the side of the second connecting plate opposite to the eighth cam and the second abutting plate to abut against the limiting piece.

12. The folding hinge structure as described in claim 10, characterized in that, The damping assembly further includes a first friction plate, a second friction plate, a third friction plate, a fourth friction plate, a fifth friction plate, and a sixth friction plate; The second friction plate and the third friction plate are both sleeved on the ends of the first camshaft, the second cam, the third camshaft, and the fourth camshaft away from the first cam and the second cam; the fifth friction plate and the sixth friction plate are both sleeved on the ends of the first camshaft, the second camshaft, the third camshaft, and the fourth camshaft away from the fifth cam and the sixth cam. A first friction plate is fitted onto one end of each of the first, second, third, and fourth camshafts, with the first friction plate located between the second and third friction plates. A fourth friction plate is fitted onto the other end of each of the first, second, third, and fourth camshafts, with the fourth friction plate located between the fifth and sixth friction plates. The two ends of the first elastic member elastically abut against the third friction plate and the side of the first camshaft facing away from the third cam, respectively. The two ends of the second elastic member elastically abut against the third friction plate and the side of the second cam facing away from the fourth cam, respectively. The two ends of the fifth elastic element elastically abut against the sixth friction plate and the side of the fifth cam that is away from the seventh cam, respectively; the two ends of the sixth elastic element elastically abut against the sixth friction plate and the side of the sixth cam that is away from the eighth cam, respectively.

13. A folding hinge structure, characterized in that, include: First limiting plate; The first cam link assembly includes a first link and a second link symmetrically arranged, the first link and the second link being rotatable relative to each other; it also includes a first cam group; the first cam group includes a first cam, a third cam, a second cam, and a fourth cam, which are arranged opposite to the first cam; Wherein, the second end of the first connecting rod is fixed with the first cam that rotates coaxially with the first connecting rod, the second end of the second connecting rod is fixed with the second cam that rotates coaxially with the second connecting rod, and the first cam and the second cam are located on the same side of the first cam connecting rod assembly; The second cam link assembly includes a symmetrically arranged third link and a fourth link, which are rotatable relative to each other. The third link rotates coaxially with the first link, and the fourth link rotates coaxially with the second link. It also includes a second cam group, wherein the first end of the third link is fixedly connected to the first end of the first link via a first link pin, and the first end of the fourth link is fixedly connected to the first end of the second link via a second link pin. The second cam group includes a fifth cam, a seventh cam, a sixth cam, and an eighth cam opposite to the fifth cam. Wherein, the second end of the third link is fixed with the seventh cam that rotates coaxially with the third link, the second end of the fourth link is fixed with the eighth cam that rotates coaxially with the fourth link, and the seventh cam and the eighth cam are located on the same side of the second cam link assembly; The first synchronization component includes a first drive gear and a second drive gear. The first drive gear is fixed to the second end of the first connecting rod and is disposed on the surface of the third cam opposite to the first cam. The second drive gear is fixed to the second end of the second connecting rod and is disposed on the surface of the fourth cam opposite to the second cam. The first drive gear and the second drive gear mesh with each other. The second synchronization component includes a third drive gear and a fourth drive gear. The third drive gear is fixed to the second end of the third connecting rod, and the fourth drive gear is fixed to the second end of the fourth connecting rod. The third drive gear and the fourth drive gear mesh with each other. An elastic drive assembly includes a first elastic element, a first camshaft, a second camshaft, and a second elastic element. The two ends of the first elastic element elastically abut against the side of the third cam facing away from the first cam and the side of the fifth cam facing away from the seventh cam, respectively. The two ends of the second elastic element elastically abut against the side of the fourth cam facing away from the second cam and the side of the sixth cam facing away from the eighth cam, respectively. The first camshaft passes through a first limiting plate, a first connecting rod, and a third connecting rod, and also passes through the first cam and the third cam. The second camshaft passes through a first limiting plate, a second connecting rod, and a fourth connecting rod, and also passes through the second cam and the fourth cam. The first limiting plate does not rotate with the first connecting rod and the second connecting rod.

14. The folding hinge structure as described in claim 13, characterized in that, Also includes: The folding hinge structure also includes a second limiting piece; The second limiting piece is sleeved on the second end of the first camshaft and the second camshaft, and the second limiting piece does not rotate with the third link and the fourth link.

15. A foldable electronic device, comprising a flexible screen, a first housing, and a second housing, characterized in that, The foldable electronic device further includes a folding hinge structure as described in any one of claims 1-12 or a folding hinge structure as described in any one of claims 13-14; The first housing and the second housing can rotate relative to each other or in opposite directions via the folding pivot structure; The first housing includes a first surface, the second housing includes a second surface, the flexible screen continuously covers the first surface of the first housing, the folding hinge structure and the second surface of the second housing, and the flexible screen is fixedly connected to the first surface of the first housing and the second surface of the second housing respectively.

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