Hinge assemblies and electronic devices

Abstract

This application discloses a hinge assembly and an electronic device, belonging to the field of communication technology. The hinge assembly includes a base, a synchronous swing arm, a virtual swing arm, a first moving member, and an elastic member. Both the synchronous swing arm and the virtual swing arm are rotatably disposed on the base. The elastic member is disposed between the synchronous swing arm and the first moving member, with both ends of the elastic member abutting against the first moving member and the synchronous swing arm, respectively. The virtual swing arm is provided with a cam portion, and the cam portion is provided with a first driving surface. The first moving member is provided with a second driving surface, and the first driving surface and the second driving surface cooperate with each other. During the rotation of the synchronous swing arm and the virtual swing arm relative to the base, the cam portion of the virtual swing arm rotates and drives the first moving member to move through the first driving surface and the second driving surface. The first moving member presses against the synchronous swing arm through the elastic member.

Description

Technical Field

[0001] This application belongs to the field of communication technology, specifically relating to a hinge assembly and an electronic device. Background Technology

[0002] With the development of technology, people are becoming increasingly reliant on electronic devices. In pursuit of a better visual experience, the screen sizes of electronic devices are getting larger and larger, but this has resulted in a significant reduction in the portability and user comfort of these devices.

[0003] To maintain portability and user comfort, foldable electronic devices are finding increasingly wider applications. In related technologies, a foldable electronic device includes a first device body, a second device body, and a hinge assembly. The first and second device bodies are rotatable relative to each other. The hinge assembly includes a synchronous swing arm, a virtual swing arm, and an elastic element. The synchronous swing arm rotates with either the first or second device body, acting on the elastic element during rotation. Simultaneously, the elastic element acts in the opposite direction on the synchronous swing arm, which bears damping force to maintain the first and second device bodies at a preset angle, improving the user experience. Furthermore, the virtual swing arm is rotatably connected to either the first or second device body to provide support for the foldable electronic device.

[0004] However, due to the fit tolerances between the components, the virtual swing arm is prone to wobbling during the relative rotation of the first and second device bodies, generating other movements besides rotation. This makes the foldable electronic device feel shaky, resulting in poor stability. Summary of the Invention

[0005] The purpose of this application is to provide a hinge assembly and electronic device that can solve the problem of poor stability of foldable electronic devices in related technologies.

[0006] In a first aspect, embodiments of this application provide a hinge assembly, the hinge assembly comprising a base, a synchronous swing arm, a virtual swing arm, a first moving member, and an elastic member, wherein:

[0007] Both the synchronous swing arm and the virtual swing arm are rotatably mounted on the base. The elastic element is disposed between the synchronous swing arm and the first moving element. Both ends of the elastic element abut against the first moving element and the synchronous swing arm, respectively. The virtual swing arm is provided with a cam portion, which is provided with a first driving surface. The first moving element is provided with a second driving surface, and the first driving surface cooperates with the second driving surface.

[0008] During the rotation of the synchronous swing arm and the virtual swing arm relative to the base, the cam portion of the virtual swing arm rotates and drives the first moving member to move through the first driving surface and the second driving surface, and the first moving member squeezes the synchronous swing arm through the elastic member.

[0009] Secondly, embodiments of this application also provide an electronic device, including a first device body, a second device body, and the aforementioned hinge assembly, wherein the first device body is connected to the second device body via the hinge assembly;

[0010] During the relative rotation of the first device body and the second device body, the electronic device switches between an unfolded state and a folded state.

[0011] In this embodiment, during the rotation of the virtual swing arm relative to the base, the cam portion of the virtual swing arm and the first moving member cooperate through the first driving surface and the second driving surface. Therefore, when the virtual swing arm rotates, it drives the first moving member to move, and the first moving member squeezes the elastic member, causing the elastic member to undergo elastic deformation and generate deformation. At the same time, the elastic member also acts in the opposite direction on the virtual swing arm, so that the virtual swing arm bears a damping force, preventing the virtual swing arm from performing any movement other than rotating relative to the base. This prevents the foldable electronic device from having a sense of misalignment, effectively avoids the problem of misalignment, and helps to improve the stability of the electronic device.

[0012] Furthermore, while the elastic element undergoes elastic deformation, it also compresses the synchronous swing arm. This means the synchronous swing arm bears the elastic force (damping force) generated by the deformation of the elastic element. The deformation of the elastic element is further amplified by the rotation of the virtual swing arm. Compared to solutions that rely solely on other methods to generate damping force on the synchronous swing arm, the increased damping force allows the foldable electronic device to maintain a more stable position at the preset angle, improving the user experience. Therefore, there is no need to increase the number of elastic elements to increase the damping force on the synchronous swing arm, which helps reduce the number of structural components, simplifies the hinge assembly structure, and promotes the miniaturization of electronic devices. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the hinge assembly disclosed in the embodiments of this application;

[0014] Figure 2 This is an exploded view of the hinge assembly disclosed in the embodiments of this application;

[0015] Figure 3 This is a partial structural schematic diagram of the hinge assembly disclosed in the embodiments of this application;

[0016] Figure 4This is a schematic diagram of the cooperation between the virtual swing arm, the first moving member, and the elastic member disclosed in the embodiments of this application;

[0017] Figure 5 This is a schematic diagram of the cooperation between the synchronous swing arm, the first moving member, and the elastic member disclosed in the embodiments of this application;

[0018] Figure 6 This is a schematic diagram of the structure of the electronic device disclosed in the embodiments of this application.

[0019] Explanation of reference numerals in the attached figures:

[0020] 100 - Synchronous swing arm, 101 - First synchronous swing arm, 102 - Second synchronous swing arm, 110 - First rotating part, c - Third driving surface, 120 - Second rotating part, e - Fifth driving surface

[0021] 200 - Virtual swing arm, 201 - First virtual swing arm, 202 - Second virtual swing arm, 210 - Cam section, a - First drive surface

[0022] 300 - First moving component, 310 - First gear, 320 - Second gear, 330 - First transmission gear, 340 - Second transmission gear, 350 - Extrusion component, 351 - First friction surface, b - Second driving surface, 360 - Limiting bracket, 361 - Second friction surface

[0023] 400 - Elastic component, 410 - First elastic component, 420 - Second elastic component

[0024] 510 - First pivot, 520 - Second pivot, 530 - Third pivot, 540 - Fourth pivot

[0025] 600 - Second moving part, d - Fourth driving surface

[0026] 700 - Third elastic element

[0027] 800 - Third moving part, f - Sixth driving surface

[0028] 810-base,

[0029] 910 - First Equipment Body

[0030] 920 - Second equipment body. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0032] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0033] The hinge assembly and electronic device provided in this application will be described in detail below with reference to the accompanying drawings and through specific embodiments and application scenarios.

[0034] Please refer to Figures 1-6 The hinge assembly disclosed in this application includes a base 810, a synchronous swing arm 100, a virtual swing arm 200, a first moving member 300, and an elastic member 400. The base 810 serves as the mounting base for the synchronous swing arm 100, the virtual swing arm 200, the first moving member 300, and the elastic member 400; both the synchronous swing arm 100 and the virtual swing arm 200 are rotatably mounted on the base 810.

[0035] An elastic element 400 is disposed between the synchronous swing arm 100 and the first moving member 300. Both ends of the elastic element 400 abut against the first moving member 300 and the synchronous swing arm 100, respectively; that is, the first end of the elastic element 400 contacts the first moving member 300, and the second end of the elastic element 400 contacts the synchronous swing arm 100. The elastic element 400 can be, but is not limited to, a spring. The virtual swing arm 200 is provided with a cam portion 210, which has a first driving surface a. The first moving member 300 has a second driving surface b, and the first driving surface a and the second driving surface b cooperate with each other. During the rotation of the synchronous swing arm 100 and the virtual swing arm 200 relative to the base 810, the cam portion 210 of the virtual swing arm 200 rotates and drives the first moving member 300 to move through the first driving surface a and the second driving surface b. The first moving member 300 squeezes the synchronous swing arm 100 through the elastic member 400. That is, when the first moving member 300 moves, it squeezes the elastic member 400, and the elastic member 400 undergoes elastic deformation. At the same time, the elastic member 400 squeezes the synchronous swing arm 100.

[0036] In this embodiment, during the rotation of the virtual swing arm 200 relative to the base 810, since the cam portion 210 of the virtual swing arm 200 and the first moving member 300 cooperate through the first driving surface a and the second driving surface b, the rotation of the virtual swing arm 200 will drive the first moving member 300 to move. In turn, the first moving member 300 will compress the elastic member 400, causing the elastic member 400 to undergo elastic deformation and generate deformation. At the same time, the elastic member 400 will also act in the opposite direction on the virtual swing arm 200, so that the virtual swing arm 200 bears the damping force, preventing the virtual swing arm 200 from performing any movement other than rotating relative to the base 810, preventing the foldable electronic device from having a misalignment feeling, effectively avoiding the problem of misalignment, and helping to improve the stability of the electronic device.

[0037] Furthermore, while the elastic element 400 undergoes elastic deformation, it also compresses the synchronous swing arm 100. In other words, the synchronous swing arm 100 bears the elastic force (damping force) generated by the deformation of the elastic element 400. The deformation of the elastic element 400 is further generated by the rotation of the virtual swing arm 200. Compared to the solution where the top cam acts on the synchronous swing arm 100, the increased damping force allows the folding electronic device to maintain a more stable position at the preset angle, improving the user experience. Therefore, there is no need to increase the number of elastic elements 400 to increase the damping force on the synchronous swing arm 100, which helps reduce the number of structural components, simplifies the hinge assembly structure, and promotes the miniaturization of electronic devices.

[0038] In an optional embodiment, the number of virtual swing arms 200 can be one; or, the number of virtual swing arms 200 can be at least two, such as including a first virtual swing arm 201 and a second virtual swing arm 202. The first virtual swing arm 201 and the second virtual swing arm 202 are both provided with cam portions 210, each cam portion 210 is provided with a first driving surface a, and the first moving member 300 is provided with at least two second driving surfaces b, and the first driving surface a and the second driving surface b correspond one-to-one.

[0039] In another embodiment, when the first virtual swing arm 201 or the second virtual swing arm 202 rotates, the first moving member 300 can be driven to move through the corresponding first driving surface a and second driving surface b, so that the first moving member 300 squeezes the elastic member 400, thereby causing the first virtual swing arm 201 or the second virtual swing arm 202 to bear the damping force applied by the elastic member 400, avoiding the first virtual swing arm 201 and the second virtual swing arm 202 from performing any movement other than rotating relative to the base 810, effectively avoiding the first virtual swing arm 201 and the second virtual swing arm 202 from having any misalignment, preventing the foldable electronic device from having a sense of misalignment, and helping to further improve the stability of the electronic device.

[0040] In one optional embodiment, the base 810 may be provided with a support member, which has a first cylindrical groove and a second cylindrical groove arranged opposite each other. The synchronous swing arm 100, the elastic member 400 and the virtual swing arm 200 are sequentially arranged between the first cylindrical groove and the second cylindrical groove. The synchronous swing arm 100 has a first column that extends into the first cylindrical groove, and the virtual swing arm 200 has a second column that extends into the second cylindrical groove. The first column is rotatably engaged with the first cylindrical groove, and the second column is rotatably engaged with the second cylindrical groove.

[0041] In another embodiment, the rotation axis of the synchronous swing arm 100 is parallel to the rotation axis of the virtual swing arm 200. The hinge assembly also includes a pivot shaft rotatably mounted on the base 810. The elastic element 400 includes a first elastic element 410. The synchronous swing arm 100, the first elastic element 410, and the first moving element 300 are sequentially sleeved on the pivot shaft. When the virtual swing arm 200 rotates, the first moving element 300 moves axially along the pivot shaft. Using this embodiment, by setting the pivot shaft, not only can rotational support be provided for the synchronous swing arm 100 and the virtual swing arm 200, improving rotational stability, but also guidance can be applied to the moving direction of the first moving element 300 and the deformation direction of the first elastic element 410, ensuring that the first moving element 300 moves accurately along the axial direction of the pivot shaft and that the first elastic element 410 undergoes elastic deformation along the axial direction of the pivot shaft.

[0042] In one optional embodiment, the number of synchronous swing arm 100, rotating shaft, and first elastic element 410 is one each. In another embodiment, combined with Figure 4 and Figure 5 As shown, the number of synchronous swing arms 100 is at least two, including a first synchronous swing arm 101 and a second synchronous swing arm 102. The number of rotating shafts is at least two, including a first rotating shaft 510 and a second rotating shaft 520 that are parallel to each other. The first synchronous swing arm 101 and the second synchronous swing arm 102 are respectively sleeved on the outside of the first rotating shaft 510 and the second rotating shaft 520, and both the first rotating shaft 510 and the second rotating shaft 520 are sleeved with a first elastic member 410. The first moving member 300 includes a first gear 310, a second gear 320, and an extrusion member 350. The first gear 310 is sleeved on the outside of the first rotating shaft 510, and the second gear 320 is sleeved on the outside of the second rotating shaft 520. The first gear 310 and the second gear 320 are connected in a transmission manner. The extrusion member 350 is provided with a second driving curved surface b. When the virtual swing arm 200 rotates, the extrusion member 350 moves and simultaneously drives the first gear 310 and the second gear 320 to move along the axial direction of the first rotating shaft 510.

[0043] In this embodiment, when the virtual swing arm 200 rotates, the first moving member 300 moves and simultaneously presses at least two first elastic members 410. These at least two first elastic members 410 then press at least two synchronous swing arms 100 respectively. That is, the first synchronous swing arm 101 and the second synchronous swing arm 102 respectively bear the damping force applied by the corresponding first elastic member 410. This damping force is generated by the rotation of the virtual swing arm 200, thus increasing the damping force borne by both the first and second synchronous swing arms 101 and 102. This helps the electronic device to maintain a more stable position at a preset angle, improving the user experience. Furthermore, when the first synchronous swing arm 101 rotates, the first rotating shaft 510 can rotate accordingly. Since the first gear 310 and the second gear 320 are connected, the rotation of the first rotating shaft 510 drives the second rotating shaft 520 to rotate via the first gear 310 and the second gear 320, thereby driving the second synchronous swing arm 102 to rotate. This achieves synchronous rotation of the first and second synchronous swing arms 101 and 102, improving the folding or unfolding efficiency of the electronic device.

[0044] Optionally, the extruder 350 is provided with at least two second driving surfaces b, which correspond to and cooperate with the first driving surface a of the first virtual swing arm 201 and the first driving surface a of the second virtual swing arm 202, respectively.

[0045] In an optional embodiment, the elastic element 400 includes only the first elastic element 410; or, as... Figure 4 As shown, the number of elastic elements 400 is at least two, including a first elastic element 410 and a second elastic element 420. The second elastic element 420 is disposed between the first rotating shaft 510 and the second rotating shaft 520. When the first moving member 300 moves, it compresses the synchronous swing arm 100 through the second elastic element 420. The second elastic element 420 can be, but is not limited to, a spring. Compared with the previous embodiment, by adding the second elastic element 420, the first moving member 300 compresses both the first elastic element 410 and the second elastic element 420 simultaneously when moving. Therefore, the total deformation of the elastic elements 400 increases. The damping force applied to the virtual swing arm 200 by the first moving member 300 by the first elastic element 410 and the second elastic element 420 further prevents the virtual swing arm 200 from producing misalignment, improving the stability of the electronic device. Simultaneously, the damping force applied to the synchronous swing arm 100 by the first elastic element 410 and the second elastic element 420 also increases, making it more conducive to the electronic device being stably maintained at any angle, further improving the user experience.

[0046] In an optional embodiment, the hinge assembly further includes a third pivot 530 and a fourth pivot 540 that are parallel to each other. The third pivot 530 is parallel to the first pivot 510. A second elastic element 420 is fitted around both the third pivot 530 and the fourth pivot 540. The first moving member 300 further includes a first transmission gear 330 and a second transmission gear 340. The first transmission gear 330 is fitted around the third pivot 530, and the second transmission gear 340 is fitted around the fourth pivot 540. The first transmission gear 330 and the second... The transmission gears 340 mesh with each other, and the first transmission gear 330 meshes with the first gear 310, and the second transmission gear 340 meshes with the second gear 320. That is, the first gear 310, the first transmission gear 330, the second transmission gear 340 and the second gear 320 mesh in sequence to ensure that the first synchronous swing arm 101 and the second synchronous swing arm 102 rotate synchronously. When the virtual swing arm 200 rotates, the extrusion member 350 moves and drives the first transmission gear 330 and the second transmission gear 340 to move axially along the third rotating shaft 530.

[0047] In this embodiment, the number of second elastic elements 420 increases, thus the total deformation of elastic elements 400 further increases during the movement of the extruder 350. The damping force exerted by the elastic elements 400 on the virtual swing arm 200 and the synchronous swing arm 100 also further increases, which can more effectively prevent the virtual swing arm 200 from generating false displacement, and is more conducive to the electronic device being stably maintained at the preset angle, thereby improving the stability of the electronic device. Moreover, by applying guidance to the deformation direction of the second elastic element 420 through the third rotating shaft 530 and the fourth rotating shaft 540, the second elastic element 420 is accurately deformed along the third rotating shaft 530, ensuring that the elastic force generated by the second elastic element 420 is an effective damping force.

[0048] Of course, in other embodiments, the hinge assembly may not have a third pivot 530 and a fourth pivot 540, and the second elastic element 420 may be directly disposed between the first pivot 510 and the second pivot 520.

[0049] In an optional embodiment, the extruder 350 is provided with a first friction surface 351, which contacts the first end face of the first gear 310, the first end face of the second gear 320, the first end face of the first transmission gear 330, and the first end face of the second transmission gear 340, respectively; and / or, the first moving member 300 further includes a limiting bracket 360, which is disposed on the side of the first gear 310 and the second gear 320 facing away from the extruder 350, and the limiting bracket 360 is provided with a second friction surface 361, which contacts the second end face of the first gear 310, the second end face of the second gear 320, the second end face of the first transmission gear 330, and the second end face of the second transmission gear 340, respectively. The first gear 310 and the second gear 320 extrude the first elastic member 410 through the limiting bracket 360, and the first transmission gear 330 and the second transmission gear 340 extrude the second elastic member 420 through the limiting bracket 360.

[0050] The first friction surface 351 contacts the first end face of each gear, and / or the second friction surface 361 contacts the second end face of each gear. During the synchronous rotation of the first synchronous swing arm 101 and the second synchronous swing arm 102, the first gear 310, the first transmission gear 330, the second transmission gear 340, and the second gear 320 all rotate. Therefore, friction is generated between the first friction surface 351 and the first end face of each gear, and / or between the second friction surface 361 and the second end face of each gear. The rotational damping force is increased, which helps the electronic device to maintain a more stable preset angle and improves the user experience.

[0051] Of course, in other embodiments, the extruder 350 may not have the first friction surface 351, and the extruder 350 may have smooth contact with the first end face of each gear; the first moving member 300 may not have the limiting bracket 360, and the first gear 310 and the second gear 320 may directly extrude the first elastic member 410, and the first transmission gear 330 and the second transmission gear 340 may directly extrude the second elastic member 420. That is, the electronic device is kept at a preset angle by relying solely on the damping force applied to the synchronous swing arm 100 by the elastic member 400.

[0052] In one optional embodiment, the elastic element 400 directly abuts against the synchronous swing arm 100, so when the elastic element 400 undergoes elastic deformation, the elastic element 400 directly applies a damping force to the synchronous swing arm 100.

[0053] In another embodiment, the hinge assembly further includes a second moving member 600. The synchronous swing arm 100 includes a first rotating portion 110, and the second moving member 600 is disposed between the first rotating portion 110 and the elastic member 400. The first rotating portion 110 is provided with a third driving surface c, and the second moving member 600 is provided with a fourth driving surface d. The third driving surface c and the fourth driving surface d cooperate. When the first rotating portion 110 rotates, it drives the second moving member 600 to move through the third driving surface c and the fourth driving surface d. The second moving member 600 compresses the elastic member 400, causing the elastic member 400 to undergo elastic deformation. Optionally, the first elastic member 410 and the second elastic member 420 both abut against the second moving member 600, and the first elastic member 410 and the second elastic member 420 compress the synchronous swing arm 100 through the second moving member 600.

[0054] In this embodiment, the rotation of the synchronous swing arm 100 is converted into movement by the second moving member 600. This causes the elastic member 400 to undergo further deformation due to the rotation of the virtual swing arm 200, in addition to the deformation caused by the rotation of the synchronous swing arm 100. As a result, the deformation of the elastic member 400 is further increased, and the damping force applied by the elastic member 400 to the virtual swing arm 200 and the synchronous swing arm 100 is also further increased. This can more effectively prevent the virtual swing arm 200 from producing false displacement, and is more conducive to the electronic device being stably maintained at the preset angle, thereby improving the stability of the electronic device.

[0055] Optionally, the second moving member 600 may have a through hole through which the rotating shaft passes. More optionally, the second moving member 600 may have at least two first through holes and at least two second through holes, with the first rotating shaft 510 and the second rotating shaft 520 passing through each of the first through holes, and the third rotating shaft 530 and the fourth rotating shaft 540 passing through each of the second through holes. In this way, the rotating shaft guides the movement direction of the second moving member 600, ensuring that the second moving member 600 moves accurately along the axial direction of the rotating shaft.

[0056] In one alternative embodiment, such as Figures 1-2 as well as Figure 5As shown, the hinge assembly also includes a third elastic element 700 and a third moving element 800. The synchronous swing arm 100 includes a second rotating part 120, and the third moving element 800 is disposed between the third elastic element 700 and the second rotating part 120. The second rotating part 120 has a fifth driving surface e, and the third moving element 800 has a sixth driving surface f. The fifth driving surface e and the sixth driving surface f cooperate. When the second rotating part 120 rotates, it drives the third moving element 800 to move through the fifth driving surface e and the sixth driving surface f. The third moving element 800 compresses the third elastic element 700, causing the third elastic element 700 to undergo elastic deformation. The third elastic element 700 can be, but is not limited to, a spring. Optionally, one end of the third elastic element 700 directly abuts against the third moving element 800, and the other end of the third elastic element 700 directly abuts against the base 810. During the movement of the third moving element 800, the third elastic element 700 is compressed.

[0057] In this embodiment, when the second rotating part 120 rotates, the third moving part 800 drives the third elastic part 700 to generate elastic deformation. At the same time, the third elastic part 700 applies a damping force to the second rotating part 120 through the third moving part 800, which further increases the damping force borne by the synchronous swing arm 100, making it more conducive to the electronic device being stably maintained at any angle when unfolded.

[0058] Optionally, there are at least two third elastic elements 700 and at least two third movable elements 800. These at least two third elastic elements 700 are respectively sleeved outside the first rotating shaft 510 and the second rotating shaft 520. Similarly, these at least two third movable elements 800 are also respectively sleeved outside the first rotating shaft 510 and the second rotating shaft 520. Both the first synchronous swing arm 101 and the second synchronous swing arm 102 include a second rotating portion 120, which is respectively sleeved outside the first rotating shaft 510 and the second rotating shaft 520. Thus, the second rotating portions 120 of both the first synchronous swing arm 101 and the second synchronous swing arm 102 bear the elastic force generated by the third elastic elements 700, thereby increasing the damping force borne by both the first synchronous swing arm 101 and the second synchronous swing arm 102, further facilitating the stable maintenance of the electronic device at any unfolded angle.

[0059] Of course, in other embodiments, the hinge assembly may not include the third elastic element 700 and the third moving element 800, and the synchronous swing arm 100 may only include the first rotating part 110, that is, the synchronous swing arm 100 may be subjected to damping force by relying solely on the first elastic element 410 and the second elastic element 420.

[0060] Based on the hinge assembly disclosed in this application, this application also discloses an electronic device. The electronic device includes a first device body 910, a second device body 920, and the hinge assembly described in the above embodiments. The first device body 910 is connected to the second device body 920 via the hinge assembly. During the relative rotation of the first device body 910 and the second device body 920, the electronic device switches between an unfolded state and a folded state. Specifically, a first synchronous swing arm 101 is connected to the first device body 910, and a second synchronous swing arm 102 is connected to the second device body 920. This configuration, using the hinge assembly, can prevent the electronic device from experiencing any slippage, thus improving its stability. Moreover, the increased damping force during folding or unfolding allows the electronic device to maintain a more stable position at a preset angle, enhancing the user experience.

[0061] The electronic devices disclosed in this application can be smartphones, tablets, e-book readers, wearable devices, video game consoles, etc. This application does not limit the specific types of electronic devices.

[0062] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A hinge assembly, characterized by The hinge assembly comprises a base (810), a synchronous swing arm (100), a virtual swing arm (200), a first moving part (300) and an elastic part (400), wherein: The synchronous swing arm (100) and the virtual swing arm (200) are rotatably arranged on the base (810), the elastic part (400) is arranged between the synchronous swing arm (100) and the first moving part (300), the two ends of the elastic part (400) are respectively in abutment with the first moving part (300) and the synchronous swing arm (100), and the virtual swing arm (200) is provided with a cam part (210), the cam part (210) is provided with a first driving curved surface (a), the first moving part (300) is provided with a second driving curved surface (b), and the first driving curved surface (a) cooperates with the second driving curved surface (b); In the process of rotating the synchronous swing arm (100) and the virtual swing arm (200) relative to the base (810), the cam part (210) of the virtual swing arm (200) rotates and drives the first moving part (300) to move through the first driving curved surface (a) and the second driving curved surface (b), and the first moving part (300) extrudes the synchronous swing arm (100) through the elastic part (400); The rotation axis of the synchronous swing arm (100) is parallel to the rotation axis of the virtual swing arm (200), the hinge assembly further comprises a rotating shaft, the elastic part (400) comprises a first elastic part (410), the synchronous swing arm (100), the first elastic part (410) and the first moving part (300) are sequentially arranged on the rotating shaft, and the first moving part (300) moves along the axial direction of the rotating shaft when the virtual swing arm (200) rotates; The number of the synchronous swing arms (100) is at least two, the at least two synchronous swing arms (100) comprise a first synchronous swing arm (101) and a second synchronous swing arm (102), the number of the rotating shafts is at least two, the at least two rotating shafts comprise a first rotating shaft (510) and a second rotating shaft (520) which are parallel to each other, the first synchronous swing arm (101) and the second synchronous swing arm (102) are respectively arranged outside the first rotating shaft (510) and the second rotating shaft (520), and the first rotating shaft (510) and the second rotating shaft (520) are both arranged with the first elastic part (410); The first moving part (300) comprises a first gear (310), a second gear (320) and a pressing part (350), the first gear (310) is sleeved outside the first rotating shaft (510), the second gear (320) is sleeved outside the second rotating shaft (520), and the first gear (310) is in transmission connection with the second gear (320), the pressing part (350) is provided with the second driving curved surface (b), when the virtual swing arm (200) rotates, the pressing part (350) moves and drives the first gear (310) and the second gear (320) to move along the axial direction of the first rotating shaft (510) at the same time, and the pressing part (350) is provided with a first friction surface (351), the first friction surface (351) is in contact with the first end surface of the first gear (310) and the first end surface of the second gear (320) respectively.

2. The hinge assembly of claim 1, wherein, The number of the virtual swing arms (200) is at least two, the at least two virtual swing arms (200) comprise a first virtual swing arm (201) and a second virtual swing arm (202), the first virtual swing arm (201) and the second virtual swing arm (202) are both provided with the cam part (210), each cam part (210) is provided with the first driving curved surface (a), the first moving part (300) is provided with at least two second driving curved surfaces (b), and the first driving curved surface (a) corresponds to the second driving curved surface (b) one by one.

3. The hinge assembly of claim 1, wherein, The number of the elastic parts (400) is at least two, the at least two elastic parts (400) comprise the first elastic part (410) and a second elastic part (420), the second elastic part (420) is arranged between the first rotating shaft (510) and the second rotating shaft (520).

4. The hinge assembly of claim 3, wherein, The hinge assembly further comprises a third rotating shaft (530) and a fourth rotating shaft (540) which are parallel to each other, the second elastic part (420) is sleeved outside the third rotating shaft (530) and the fourth rotating shaft (540), The first moving part (300) further comprises a first transmission gear (330) and a second transmission gear (340), the first transmission gear (330) is sleeved outside the third rotating shaft (530), the second transmission gear (340) is sleeved outside the fourth rotating shaft (540), the first transmission gear (330) is engaged with the second transmission gear (340), the first transmission gear (330) is engaged with the first gear (310), the second transmission gear (340) is engaged with the second gear (320), when the virtual swing arm (200) rotates, the pressing part (350) moves and drives the first transmission gear (330) and the second transmission gear (340) to move along the axial direction of the third rotating shaft (530).

5. The hinge assembly of claim 4, wherein, The first friction surface (351) is in contact with the first end surface of the first transmission gear (330) and the first end surface of the second transmission gear (340) respectively. And / or, the first moving part (300) further comprises a limiting support (360), the limiting support (360) is arranged on the side of the first gear (310) and the second gear (320) away from the extrusion part (350), and the limiting support (360) is provided with a second friction surface (361), the second friction surface (361) is in contact with the second end surface of the first gear (310), the second end surface of the second gear (320), the second end surface of the first transmission gear (330) and the second end surface of the second transmission gear (340) respectively, the first gear (310) and the second gear (320) extrude the first elastic part (410) through the limiting support (360), and the first transmission gear (330) and the second transmission gear (340) extrude the second elastic part (420) through the limiting support (360).

6. The hinge assembly of claim 1, wherein, The hinge assembly further comprises a second moving part (600), and the synchronous swing arm (100) comprises a first rotating part (110). The second moving part (600) is arranged between the first rotating part (110) and the elastic part (400), the first rotating part (110) is provided with a third drive curved surface (c), the second moving part (600) is provided with a fourth drive curved surface (d), the third drive curved surface (c) cooperates with the fourth drive curved surface (d), the first rotating part (110) drives the second moving part (600) to move through the third drive curved surface (c) and the fourth drive curved surface (d) when the first rotating part (110) rotates, the second moving part (600) extrudes the elastic part (400), and the elastic part (400) elastically deforms.

7. The hinge assembly of claim 1, wherein, The hinge assembly further comprises a third elastic part (700) and a third moving part (800), and the synchronous swing arm (100) comprises a second rotating part (120). The third moving part (800) is arranged between the third elastic part (700) and the second rotating part (120), the second rotating part (120) is provided with a fifth drive curved surface (e), the third moving part (800) is provided with a sixth drive curved surface (f), the fifth drive curved surface (e) cooperates with the sixth drive curved surface (f), the second rotating part (120) drives the third moving part (800) to move through the fifth drive curved surface (e) and the sixth drive curved surface (f) when the second rotating part (120) rotates, the third moving part (800) extrudes the third elastic part (700), and the third elastic part (700) elastically deforms.

8. An electronic device, comprising: The electronic device comprises a first device body (910), a second device body (920) and the hinge assembly according to any one of claims 1-7, and the first device body (910) is connected with the second device body (920) through the hinge assembly. During relative rotation of the first device body (910) and the second device body (920), the electronic device is switched between an unfolded state and a folded state.

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