Hinge assembly and electronic device

Abstract

The application discloses a hinge assembly and an electronic device. The hinge assembly comprises a hinge support, a swing arm rotatably connected with the hinge support, a top rod arranged on the swing arm and having a first end facing the hinge support, a rotating member rotatably connected with the swing arm, the rotating member comprising an abutting portion and a movable portion, the abutting portion abutting against the top rod, and an elastic member arranged between the movable portion and the swing arm to make the first end of the top rod abut against the hinge support and generate rotational damping of the swing arm.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of electronic devices, and particularly relates to a hinge assembly and an electronic device with the same. BACKGROUND

[0002] With the development of electronic devices, consumers have increasingly strong demand for folding screens and increasingly high requirements. In order to control the feeling during the flipping process, or to make the screen stop at a certain angle (commonly known as hovering) in a specific scenario of the consumer, the hinge assembly has a damping mechanism.

[0003] In the related art, the damping mechanism of the hinge assembly is matched with a cam in the rotating process through the rotating shaft structure of the hinge, and the rotating damping is formed by the abutment of the cam surface. The damping mechanism has a single structure, and the rotating damping that can be provided is limited, which cannot meet the requirement of hovering at any angle. SUMMARY

[0004] The present application aims to provide a hinge assembly and an electronic device, which at least solve the problem that the rotating damping provided by the existing hinge assembly is limited and cannot realize hovering at any angle.

[0005] To solve the above technical problems, the present application is implemented as follows:

[0006] In a first aspect, the embodiments of the present application provide a hinge assembly, comprising: a hinge bracket; an oscillating arm, which is rotationally connected with the hinge bracket; a top rod, which is arranged on the oscillating arm, and a first end of the top rod faces the hinge bracket; a rotating member and an elastic member, the rotating member is rotationally connected with the oscillating arm, the rotating member comprises an abutting portion and a movable portion, the abutting portion abuts against the top rod, and the elastic member is arranged between the movable portion and the oscillating arm, so that the first end of the top rod abuts against the hinge bracket to generate the rotating damping of the oscillating arm.

[0007] In a second aspect, the embodiments of the present application provide an electronic device, comprising the hinge assembly described in the above embodiments.

[0008] In the embodiments of the present application, by arranging the rotatable rotating member on the oscillating arm, the rotating member can convert the elastic force of the elastic member into the required acting force of the first end of the top rod abutting against the hinge bracket, so that the top rod can provide the rotating damping for the oscillating arm, and the setting positions of the elastic member and the rotating member are relatively flexible, which reduces the limitation of the hinge assembly by the installation space, can expand the design space of the electronic device, improves the applicability of the hinge assembly, and can adjust the damping force provided by the hinge according to the actual needs to meet the requirement of hovering at any angle.

[0009] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and the attendant drawings or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0010] The foregoing and / or additional aspects and advantages of the present application are achieved by providing a folding assembly as specified in the claims.

[0011] Figure 1 is a structural schematic view of a folding assembly according to a first embodiment of the present application;

[0012] Figure 2 is a partial structural schematic view of a folding assembly according to the first embodiment of the present application;

[0013] Figure 3 is an exploded view of a partial structure of a folding assembly according to the first embodiment of the present application;

[0014] Figure 4 is a partial structural schematic view of a folding assembly according to one specific embodiment of the present application;

[0015] Figure 5 is a partial structural schematic view of a folding assembly according to another specific embodiment of the present application;

[0016] Figure 6 is a structural schematic view of a folding assembly according to a second embodiment of the present application;

[0017] Figure 7 is Figure 6 is a sectional view taken along the centerline A-A;

[0018] Figure 8 is a partial structural schematic view of a folding assembly according to the second embodiment of the present application;

[0019] Figure 9 is an exploded view of a partial structure of a folding assembly according to the second embodiment of the present application;

[0020] Figure 10 is a structural schematic view of a folding assembly according to a third embodiment of the present application;

[0021] Figure 11 is a partial structural schematic view of a folding assembly according to the third embodiment of the present application;

[0022] Figure 12 is an exploded view of a partial structure of a folding assembly according to the third embodiment of the present application;

[0023] Figure 13 is a structural schematic view of a folding assembly according to a fourth embodiment of the present application;

[0024] Figure 14 is a partial structure diagram of a folding assembly according to a fourth embodiment of the present application;

[0025] Figure 15 is an exploded view of a partial structure of a folding assembly according to a fourth embodiment of the present application.

[0026] Reference Signs:

[0027] Hinge assembly 100;

[0028] Swing arm 10; pivot portion 11; guide rail 12;

[0029] Top rod 20; tooth portion 21; accommodating groove 22; guide groove 23;

[0030] Rotating piece 30; rotating connection portion 31; first rod body portion 32; second rod body portion 33; abutting portion 34; pulley 35; matching groove 351; pull rope 36; gear 37; connecting rope 38;

[0031] Elastic member 40;

[0032] Hinge bracket 50. DETAILED DESCRIPTION

[0033] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, and are used only for explaining the present application, and cannot be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts, fall within the scope of protection of the present application.

[0034] The terms "first", "second" in the description and claims of the present application can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0035] In the description of the present application, it is to be understood that the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0036] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] First, the hinge assembly 100 according to the embodiments of the present application will be described below. Figures 1 to 15

[0038] The hinge assembly 100 according to the embodiments of the present application comprises a hinge bracket 50, a swing arm 10, a top rod 20, a rotating piece 30 and an elastic piece 40.

[0039] Specifically, the swing arm 10 is rotationally connected with the hinge bracket 50, the top rod 20 is arranged on the swing arm 10, and a first end of the top rod 20 faces the hinge bracket 50, the rotating piece 30 is rotationally connected with the swing arm 10, the rotating piece 30 comprises an abutting portion 34 and a movable portion, the abutting portion 34 abuts against the top rod 20, and the elastic piece 40 is arranged between the movable portion and the swing arm 10, so that the first end of the top rod 20 abuts against the hinge bracket 50 to generate rotational damping of the swing arm 10.

[0040] As shown in Figures 1 to 15 , the hinge assembly 100 according to the embodiments of the present application can comprise a hinge bracket 50 and two swing arms 10, the two swing arms 10 are located on both sides of the hinge bracket 50, and the two swing arms 10 are respectively rotationally connected with the hinge bracket 50, the two swing arms 10 can be used to mount a folding screen, so that the folding screen can be folded, in addition, the two swing arms 10 can also be used to mount other foldable objects, which are not listed in the present application. The hinge assembly 100 also has top rods 20, rotating pieces 30 and elastic pieces 40 corresponding to the number of swing arms 10, and one swing arm 10 will be taken as an example for description below.

[0041] As shown in Figures 1 to 15 ​As shown, the swing arm 10 is provided with a groove for mounting a push rod 20, a rotating member 30, and an elastic member 40. The push rod 20 is mounted on the swing arm 10, and the first end of the push rod 20 faces the hinge bracket 50 so as to abut against the hinge bracket 50. The swing arm 10 is provided with a protruding rotating shaft portion 11. The axis of the rotating shaft portion 11 can be perpendicular to the rotation axis of the swing arm 10. The rotating member 30 is rotatably mounted on the rotating shaft portion 11. The rotating member 30 can transmit forces in different directions to the push rod 20 through its abutment portion 34. The elastic member 40 is disposed between the movable part of the rotating member 30 and the swing arm 10. Under the action of the elastic member 40, the rotating member 30 has a certain rotational force. The rotating member 30 transmits the elastic force of the elastic member 40 to the push rod 20 through the abutment portion 34, so that the first end of the push rod 20 can abut against the hinge bracket 50, thereby generating rotational damping of the swing arm 10.

[0042] Therefore, according to the hinge assembly 100 of this application embodiment, by providing a rotatable rotating member 30 on the swing arm 10, the rotating member 30 can convert the elastic force of the elastic member 40 into the force required for the first end of the top rod 20 to abut against the hinge bracket, so that the top rod 20 can provide rotational damping for the swing arm 10, and the setting positions of the elastic member 40 and the rotating member 30 are more flexible, reducing the limitation of the hinge assembly 100 on the installation space, expanding the design space of electronic devices, and improving the applicability of the hinge assembly 100.

[0043] In some specific embodiments of this application, the elastic element 40 is formed as a linear spring, and the rotating element 30 includes a rotating connection portion 31 and a first rod portion 32.

[0044] Specifically, the rotating connection part 31 is rotatably disposed on the swing arm 10 around its own axis, the first end of the first rod part 32 is disposed on the rotating connection part 31, and the second end of the first rod part 32 is away from the axis of the rotating connection part 31; the abutment part 34 is disposed on the first rod part 32, the movable part is disposed on the second end of the first rod part 32 or on the side of the first rod part 32 away from the top rod 20, the first end of the elastic member 40 is connected to the movable part, and the second end of the elastic member 40 is connected to the swing arm 10.

[0045] In other words, such as Figures 1 to 5 As shown, the rotating member 30 has a rotating connecting portion 31 and a first rod portion 32. The rotating connecting portion 31 can extend along the axis of the rotating shaft portion 11 and is rotatably disposed on the rotating shaft portion 11. The first end of the first rod portion 32 can be fixed to the circumferential sidewall of the rotating connecting portion 31, and the second end of the first rod portion 32 is away from the axis of the rotating connecting portion 31. The abutting portion 34 can be a part of the first rod portion 32 to facilitate abutting with the top rod 20. The movable portion can also be a part of the first rod portion 32. The elastic member 40 is formed as a linear spring, such as a compression spring or a tension spring, and the direction of the elastic force of the linear spring does not point to the axis of the rotating connecting portion 31.

[0046] As shown in Figure 4 and Figure 5 , when the elastic member 40 is a compression spring, the first rod body part 32 is formed with a movable part on the side away from the top rod 20, the first end of the compression spring is in abutment with the movable part, the other end of the compression spring is in abutment with the swing arm 10, and the compression spring is in a compressed state, so that the first end of the top rod 20 can continuously abut against the hinged support; as shown in Figures 1 to 3 , when the elastic member 40 is a tension spring, the second end of the first rod body part 32 is formed with a movable part, the first end of the tension spring can be fixed on the second end of the first rod body part 32 in a hanging manner, and the second end of the tension spring can also be fixed on the swing arm 10 in a hanging manner, the tension spring is in a stretched state, and under the tension of the tension spring, the first end of the top rod 20 can continuously abut against the hinged support 50.

[0047] In the embodiment, the rotating connection part 31 and the first rod body part 32 form a lever structure, and the specific setting position of the elastic member 40 can be determined according to actual needs. For example, when it is required to achieve a larger damping through an elastic member 40 with smaller elasticity, the abutment part 34 is located between the first end of the first rod body and the movable part, so that the rotating connection part 31 and the first rod body part 32 form a force-saving lever, the first rod body part 32 can amplify the elastic force of the elastic member 40, and the first end of the top rod 20 can have a larger abutment force.

[0048] Specifically, as shown in Figure 2 , the abutment part 34 on the first rod body part 32 and the axis of the rotating connection part 31 form a resistance arm L1, and the movable part on the first rod body part 32 and the axis of the rotating connection part 31 form a power arm L2. According to the principle of lever: power x power arm = resistance x resistance arm, it can be known that when the power is constant, the size of the resistance can be adjusted by adjusting the size of the power arm and the resistance arm. When the elastic force of the elastic member 40 is constant, increasing the size of L2 or reducing the length of L1 can increase the abutment force of the abutment part 34 against the top rod 20, so as to achieve the purpose of increasing the damping force.

[0049] As shown in Figure 3 , in some specific embodiments of the present application, the elastic member 40 is provided in multiple, and through multiple elastic members 40, the thrust force provided by the movable part for the top rod 20 can be further improved in a limited space.

[0050] According to one embodiment of the present application, the abutment part 34 is arranged on the side of the second end of the first rod body part 32 towards the top rod 20, and the abutment part 34 is in abutment with the second end of the top rod 20.

[0051] That is, as shown in Figures 1 to 5 , the abutment part 34 is arranged on the side of the second end of the first rod body part 32 away from the top rod 20, and the abutment part 34 is in abutment with the second end of the top rod 20.As shown, a portion of the first rod body 32 on the side towards the second end of the top rod 20 is formed as an abutting portion 34 so as to abut against the second end of the top rod 20, and the specific position of the abutting portion 34 on the first rod body 32 can be determined according to actual needs, which will not be described herein again in the embodiment.

[0052] In some embodiments of the present application, the abutting portion 34 is formed as a protrusion protruding from the plane of the first end of the first rod body 32 and the second end of the first rod body 32.

[0053] Specifically, as shown in Figure 1 and Figure 2 , the first rod body 32 is provided with a protrusion on the side towards the second end of the top rod 20, and the protrusion is located between the first end of the first rod body 32 and the second end of the first rod body 32, which serves as the abutting portion 34, so that the abutting portion 34 can abut against the set position of the second end of the top rod 20, i.e., the end face of the second end of the top rod 20, avoiding the abutting portion 34 from abutting against the edge of the second end of the top rod 20, thereby ensuring the balanced force of the top rod 20 and the force transmission effect of the top rod 20.

[0054] According to an embodiment of the present application, the abutting portion 34 is provided at the second end of the first rod body 32, and the abutting portion 34 abuts against the second end of the top rod 20.

[0055] That is, as shown in Figure 10 , the second end of the first rod body 32 can serve as the abutting portion 34, and the second end of the first rod body 32 can be formed as an arc surface so as to contact the second end of the top rod 20, which can avoid damage to the first rod body 32 and the top rod 20, thereby ensuring the reliability of the hinge assembly 100.

[0056] In some embodiments of the present application, the top rod 20 is provided with a tooth portion 21 extending along the movement direction of the top rod 20, and the rotating member 30 comprises a gear 37 and a second rod body 33.

[0057] Specifically, the gear 37 is rotatably provided on the swing arm 10 about its own axis, the transmission teeth of the gear 37 form the abutting portion 34, the transmission teeth are engaged with the tooth portion 21, the first end of the second rod body 33 is provided on the gear 37, the second end of the second rod body 33 is away from the axis of the gear 37, the movable portion is provided on the second rod body 33, the first end of the elastic member 40 is connected with the second rod body 33, and the second end of the elastic member 40 is connected with the swing arm 10.

[0058] In other words, as shown in Figures 6 to 9As shown, the rotating member 30 can be composed of a gear 37 and a second rod body 33, wherein the gear 37 is rotatably arranged on the rotating shaft 11, the transmission teeth of the gear 37 serve as the abutting portion 34, the top rod 20 can be formed as a rack, the tooth portion 21 of the rack is directed to the direction where the gear 37 is located, at least one transmission tooth of the gear 37 can abut on the tooth portion 21 in the movement direction of the top rod 20, the first end of the second rod body 33 is fixedly connected on the circumferential sidewall of the gear 37, and the second end of the second rod body 33 extends along the radial direction of the gear 37, the second end of the second rod body 33 can serve as the movable portion, and the two ends of the elastic member 40 are respectively connected with the second rod body 33 and the swing arm 10.

[0059] In the embodiment, the gear 37 and the second rod body 33 are formed as a lever structure, the second rod body 33 serves as a power arm, the force of the elastic member 40 can be amplified through the power arm, and the force is transmitted to the top rod 20 through the transmission teeth, so that the hinge assembly 100 can generate a larger damping force using an elastic member 40 with a smaller elastic force, and the force of the elastic member 40 can be smoothly transmitted to the top rod 20 through the transmission teeth and the tooth portion 21.

[0060] Optionally, as shown in Figures 9 to 9 The second end of the second rod body 33 is connected with the elastic member 40 through a connecting rope 38, the first end of the connecting rope 38 is connected with the second end of the second rod body 33, and the second end of the connecting rope 38 is connected with the elastic member 40.

[0061] According to an embodiment of the present application, the rotating member 30 comprises a rotating connecting portion 31 and a first rod body 32.

[0062] Specifically, the rotating connecting portion 31 is rotatably arranged on the swing arm 10 about the axis of the rotating connecting portion 31, the first end of the first rod body 32 is arranged on the rotating connecting portion 31, and the second end of the first rod body 32 is away from the axis of the rotating connecting portion 31; the abutting portion 34 is arranged on the second end of the first rod body 32, the movable portion is arranged on the rotating connecting portion 31, the elastic member 40 is formed as a clock spring or a torsion spring, the first end of the elastic member 40 is connected with the rotating connecting portion 31, and the second end of the elastic member 40 is connected with the swing arm 10.

[0063] That is, as shown in Figure 11 and Figure 12 The rotating member 30 comprises a rotating connecting portion 31 and a first rod body 32, the rotating connecting portion 31 can extend along the axis of the rotating shaft 11 and is rotatably arranged on the rotating shaft 11, the first end of the first rod body 32 can be fixed on the circumferential sidewall of the rotating connecting portion 31, the second end of the first rod body 32 is away from the axis of the rotating connecting portion 31, and the second end of the first rod body 32 is formed as the abutting portion 34.

[0064] In this embodiment, the elastic element 40 can be a mainspring or a spring. The following description uses the mainspring as the elastic element 40. The rotating element 30 is provided with a mounting groove for accommodating the mainspring on the side facing the swing arm 10. The mounting groove is provided with a first slot for mounting the mainspring. The first slot is formed as a movable part. The mounting groove can be coaxially arranged with the rotating shaft 11. The circumferential sidewall of the rotating shaft 11 can be provided with a second slot for mounting the mainspring. The first end of the mainspring is fixedly installed in the first slot, and the second end of the mainspring is fixedly installed in the second slot.

[0065] A clockwork mechanism can replace a linear spring to provide thrust, using rotational torque instead of the linear thrust provided by a linear spring. This allows for a smaller size of the damping structure on the swing arm, saving space. When there is sufficient space in the thickness direction of the electronic device, the elastic element 40 can be a torsion spring. This further reduces the space occupied by the rotating element 30 and the elastic element 40 in the length and width directions, leaving more design space for the electronic device.

[0066] The elastic element 40 mentioned in this application can be replaced with different elastic elements 40 according to actual needs. For example, the linear spring in the above embodiment can be replaced with a clockwork or spring. It only requires changing the installation position of the elastic element 40, which will not be described in detail in this application.

[0067] In some specific embodiments of this application, the rotating component 30 includes a pulley 35 and a pull rope 36. The pulley 35 is rotatably mounted on the swing arm 10 around its own axis. A mating groove 351 is provided on the outer periphery of the pulley 35. An abutment portion 34 is provided between the first end and the second end of the pull rope 36. The first end of the pull rope 36 is connected to the swing arm 10. The second end of the pull rope 36 passes through the top rod 20 and the mating groove 351 in sequence. A movable portion is provided at the second end of the pull rope 36. The first end of the elastic member 40 is connected to the second end of the pull rope 36. The second end of the elastic member 40 is connected to the swing arm 10 so that the abutment portion 34 abuts against the second end of the top rod 20.

[0068] In other words, such as Figures 13 to 15 As shown, the rotating member 30 can be composed of a pulley 35 and a tension member. The pulley 35 is rotatably mounted on the rotating shaft 11 around its own axis. The outer circumferential surface of the pulley 35 is provided with a mating groove 351 extending circumferentially. The mating groove 351 can limit the pull rope 36 and prevent the pull rope 36 from falling off the pulley 35. The first end of the pull rope 36 can be fixedly connected to the swing arm 10. The second end of the pull rope 36 is formed as a movable part. After passing through the top rod 20 and the mating groove 351 on the pulley 35, the second end of the pull rope 36 is fixedly connected to the first end of the elastic member 40. The second end of the elastic member 40 is fixedly connected to the swing arm 10.

[0069] like Figure 14 and Figure 15As shown, the abutting portion 34 is arranged between the first end of the pull rope 36 and the pulley 35, the elastic member 40 is a tension spring in a stretched state, so that the pull rope 36 can be pulled tight, and the abutting portion on the pull rope 36 can abut against the second end of the top rod 20 to provide an abutting force for the top rod 20.

[0070] In this embodiment, the tension force of the tension spring can be converted into the abutting force of the top rod 20 in the first direction by the pulley 35, the placement position of the tension spring is required to be low, and the placement position and angle of the tension spring can be determined according to actual requirements, so that the design space is more free.

[0071] Optionally, the rotating shaft portion 11 can be movable along the length direction of the top rod 20, so that the pulley 35 and the pull rope 36 form a movable pulley block, the elastic force of the elastic member 40 can be amplified by the movable pulley block, so that the limitation that the damping force is insufficient due to insufficient elastic force of the elastic member 40 can be broken.

[0072] According to one embodiment of the present application, the second end of the top rod 20 is provided with a containing groove 22, and the abutting portion 34 is located in the containing groove 22 and abuts against the top rod 20.

[0073] That is, as shown, Figure 15 The second end of the top rod 20 is provided with a containing groove 22 containing the pull rope 36, and the connection relationship between the pull rope 36 and the top rod 20 is more stable through the containing groove 22, so that the pull rope 36 is prevented from falling off the top rod 20, and the reliability of the hinge assembly 100 is improved.

[0074] In some specific embodiments of the present application, the swing arm 10 is provided with a guide rail 12 extending in the first direction, the top rod 20 is provided with a guide groove 23 matched with the guide rail 12, and the top rod 20 is movably arranged in the guide rail 12 in the first direction.

[0075] Specifically, as shown, Figure 15 The swing arm 10 can be provided with a guide rail 12 extending in the first direction, and the top rod 20 can be provided with a guide groove 23, the top rod 20 is guided through the cooperation of the guide groove 23 and the guide rail 12, and the stability of the hinge assembly 100 during operation can be improved.

[0076] In summary, according to the hinge assembly 100 of the embodiment of the present application, the rotatable rotating member 30 is arranged on the swing arm 10, the rotating member 30 can convert the elastic force of the elastic member 40 into the required force for the first end of the top rod 20 to abut against the hinge bracket 50, so that the top rod 20 can provide rotational damping for the swing arm 10, and the setting positions of the elastic member 40 and the rotating member 30 are relatively flexible, the hinge assembly 100 is less limited by the installation space, the design space of the electronic equipment can be expanded, and the applicability of the hinge assembly 100 is improved.

[0077] Embodiments of the present application also provide an electronic device, for example, but not limited to, a mobile phone, a tablet computer, a television, a watch, a VR head-mounted display, and any other product or component with display function, which comprises the hinge assembly 100 of any of the above embodiments. Since the hinge assembly 100 according to the embodiments of the present application has the above technical effects, the electronic device according to the embodiments of the present application also has corresponding technical effects, that is, the mounting positions of the elastic member 40 and the rotating member 30 in the electronic device can be determined according to the mounting space, so that the electronic device has a larger design space.

[0078] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0079] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A hinge assembly, characterized in that, include: Hinge bracket; A swing arm, which is rotatably connected to the hinge bracket, and the swing arm is provided with a protruding pivot portion; A push rod is provided on the swing arm, and the first end of the push rod faces the hinge bracket; A rotating component and an elastic component are provided. The rotating component is rotatably disposed on the pivot portion so that the rotating component is rotatably connected to the swing arm. The rotating component includes an abutting portion and a movable portion. The abutting portion abuts against the top rod. The elastic component is disposed between the movable portion and the swing arm so that the first end of the top rod abuts against the hinge bracket to generate rotational damping of the swing arm.

2. The hinge assembly according to claim 1, characterized in that, The elastic element is formed as a linear spring, and the rotating element includes: A rotating connecting part is rotatably disposed on the swing arm about its own axis; A first rod portion, with a first end disposed at the rotating connection portion, and a second end of the first rod portion located away from the axis of the rotating connection portion; The abutting part is located on the first rod body, the movable part is located at the second end of the first rod body or on the side of the first rod body away from the top rod, the first end of the elastic member is connected to the movable part, and the second end of the elastic member is connected to the swing arm.

3. The hinge assembly according to claim 2, characterized in that, The abutting part is located on the side of the first rod body facing the second end of the top rod, and the abutting part abuts against the second end of the top rod.

4. The hinge assembly according to claim 3, wherein the abutting portion is formed as a protrusion protruding from the plane containing the first end of the first rod portion and the second end of the first rod portion.

5. The hinge assembly according to claim 2, characterized in that, The abutting part is located at the second end of the first rod body, and the abutting part abuts against the second end of the top rod.

6. The hinge assembly according to claim 1, characterized in that, The push rod is provided with teeth extending along the direction of movement of the push rod, and the rotating member includes: A gear, rotatably mounted on the rocker arm about its own axis, wherein the transmission teeth of the gear form the abutment portion and mesh with the tooth portion; The second rod portion has a first end located on the gear and a second end located away from the axis of the gear. The movable portion is located on the second rod portion. The first end of the elastic element is connected to the second rod portion, and the second end of the elastic element is connected to the swing arm.

7. The hinge assembly according to claim 1, characterized in that, The rotating component includes: A rotating connecting part is rotatably disposed on the swing arm about its own axis; A first rod portion, with a first end disposed at the rotating connection portion, and a second end of the first rod portion located away from the axis of the rotating connection portion; The abutting part is located at the second end of the first rod body, and the movable part is located at the rotating connecting part. The elastic element is formed as a spring or a torsion spring, with its first end connected to the rotating connection and its second end connected to the swing arm.

8. The hinge assembly according to claim 1, characterized in that, The rotating component includes: A pulley is rotatably mounted on the swing arm about its own axis, and a mating groove is provided on the outer periphery of the pulley; A pull rope, wherein the abutting part is disposed between the first end of the pull rope and the second end of the pull rope, the first end of the pull rope is connected to the swing arm, the second end of the pull rope passes sequentially through the top rod and the mating groove, and the movable part is disposed at the second end of the pull rope; The first end of the elastic element is connected to the second end of the pull rope, and the second end of the elastic element is connected to the swing arm so that the abutting part abuts against the second end of the top rod.

9. The hinge assembly according to claim 8, characterized in that, The second end of the top rod is provided with a receiving groove, and the abutting part is located in the receiving groove and abuts against the top rod.

10. The hinge assembly according to any one of claims 1-9, characterized in that, The swing arm is provided with a guide rail extending along a first direction, and the push rod is provided with a guide groove that matches the guide rail. The push rod is movably disposed on the guide rail along the first direction.

11. An electronic device, characterized in that, Includes the hinge assembly according to any one of claims 1-10.

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