Hinge assemblies and electronic devices

Abstract

This application discloses a hinge assembly and an electronic device. The hinge assembly includes: a pivot, a swing arm, a fixed bracket, a connecting shaft, and a limiting assembly. The limiting assembly is disposed on the fixed bracket. A first end of the swing arm passes through the pivot and is rotatable around the pivot to switch between a folded state and an unfolded state. A second end of the swing arm passes through the connecting shaft and is slidably connected to the fixed bracket via the connecting shaft. The end of the connecting shaft cooperates with the limiting assembly to ensure that the swing arm remains relatively stationary relative to the fixed bracket in both the unfolded and folded states.

Description

Technical Field

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

[0002] With the continuous development of hinge assembly technology, the application of hinge assemblies in people's lives is becoming increasingly widespread. Current hinge assemblies typically have a gap between the swing arm and the fixed support, which causes relative slippage between the swing arm and the fixed support when the hinge assembly switches between the unfolded and folded states, resulting in poor stability. Summary of the Invention

[0003] This application aims to provide a hinge assembly and an electronic device that solves the problem of poor stability of the hinge assembly.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows:

[0005] In a first aspect, embodiments of this application propose a hinge assembly, including: a pivot, a swing arm, a fixed bracket, a connecting shaft, and a limiting component. The limiting component is disposed on the fixed bracket. A first end of the swing arm passes through the pivot and is rotatable around the pivot to switch between a folded state and an unfolded state. A second end of the swing arm passes through the connecting shaft and is slidably connected to the fixed bracket via the connecting shaft. The end of the connecting shaft cooperates with the limiting component to ensure that the swing arm remains relatively stationary relative to the fixed bracket in both the unfolded and folded states.

[0006] In a second aspect, embodiments of this application provide an electronic device including the hinge assembly described in the first aspect above.

[0007] In the embodiments of this application, since the second end of the swing arm passes through the connecting shaft and the end of the connecting shaft cooperates with the limiting component, the swing arm and the fixed bracket remain relatively stationary when the swing arm is in the unfolded state and the folded state. This increases the stability between the swing arm and the fixed bracket, thereby reducing the occurrence of relative sliding between the swing arm and the fixed bracket, and further increasing the stability of the hinge assembly.

[0008] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0009] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0010] Figure 1This is a schematic diagram of the structure of a hinge assembly provided in an embodiment of this application;

[0011] Figure 2 This is an exploded view of a hinge assembly provided in an embodiment of this application;

[0012] Figure 3 This is a schematic diagram of another hinge assembly provided in an embodiment of this application;

[0013] Figure 4 This is a schematic diagram of another hinge assembly provided in an embodiment of this application;

[0014] Figure 5 This is a schematic diagram of a swing arm in a folded state according to an embodiment of this application;

[0015] Figure 6 This is a schematic diagram of a swing arm in an extended state, provided in an embodiment of this application.

[0016] Figure 7 This is a schematic diagram of the structure of a spring sheet included in another hinge assembly provided in this application embodiment. Detailed Implementation

[0017] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0018] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0019] See Figures 1 to 7 , Figure 1 This is a schematic diagram of a hinge assembly provided in an embodiment of this application. Figure 2 An exploded view of a hinge assembly provided in an embodiment of this application. Figures 3 to 6 These are schematic diagrams of a hinge assembly provided in an embodiment of this application. Figure 7 This is a schematic diagram of the structure of a spring in a hinge assembly provided in an embodiment of this application.

[0020] like Figure 3 and Figure 4 As shown, the hinge assembly includes: a pivot 10, a swing arm 20, a fixed bracket 30, a connecting shaft 40, and a limiting component 50. The limiting component 50 is disposed on the fixed bracket 30. The first end of the swing arm 20 passes through the pivot 10, and the swing arm 20 can rotate around the pivot 10 to switch between a folded state and an unfolded state. The second end of the swing arm 20 passes through the connecting shaft 40, and the swing arm 20 is slidably connected to the fixed bracket 30 through the connecting shaft 40. The end of the connecting shaft 40 cooperates with the limiting component 50 so that the swing arm 20 remains relatively stationary with respect to the fixed bracket 30 in both the unfolded and folded states.

[0021] The working principle of the embodiments of this application can be found in the following description:

[0022] Since the second end of the swing arm 20 passes through the connecting shaft 40, and the end of the connecting shaft 40 cooperates with the limiting component 50, the swing arm 20 and the fixed bracket 30 remain relatively stationary in the unfolded and folded states. This increases the stability between the swing arm 20 and the fixed bracket 30, thereby reducing the occurrence of relative sliding between the swing arm 20 and the fixed bracket 30, and further increasing the stability of the hinge assembly.

[0023] In this embodiment of the application, by setting the limiting component 50, the difficulty of the swing arm 20 sliding relative to the fixed bracket 30 in the unfolded state and the folded state is increased, thereby increasing the stability of the hinge component.

[0024] It should be noted that the pivot 10, the swing arm 20, the fixed bracket 30, the connecting shaft 40 and the limiting component 50 can form a swing arm assembly, and the number of swing arm assemblies included in the hinge assembly is not limited here. Optionally, the number of swing arm assemblies can be two, which can increase the coverage area of ​​the hinge assembly.

[0025] It should be noted that the specific structure of the limiting component 50 is not limited here. As an optional implementation, the limiting component 50 can be a locking member, which includes a receiving groove, and the end of the connecting shaft 40 passes through the receiving groove and can slide along the receiving groove.

[0026] As another alternative implementation, see Figures 4 to 6The limiting component 50 includes a damping block 51. The fixed bracket 30 has a groove 31 on the side facing the swing arm 20. The extension direction of the groove 31 is the same as the extension direction of the swing arm 20. The damping block 51 is located between the connecting shaft 40 and the groove 31. The connecting shaft 40 abuts against the damping block 51. The damping block 51 can rotate relative to the fixed bracket 30.

[0027] Among them, see Figure 5 When the swing arm 20 is in the folded state, the end of the connecting shaft 40 abuts against the side wall of the slide groove 31 near the rotating shaft 10 and the end of the damping block 51 near the rotating shaft 10, respectively. See Figure 6 When the swing arm 20 is in the unfolded state, the end of the connecting shaft 40 abuts against the side wall of the slide groove 31 away from the rotating shaft 10 and the end of the damping block 51 away from the rotating shaft 10, respectively.

[0028] The side wall of the slide 31 near the rotating shaft 10 can be referred to as the first side wall, the side wall of the slide 31 away from the rotating shaft 10 can be referred to as the second side wall, the end of the damping block 51 near the rotating shaft 10 can be referred to as the first end, and the end of the damping block 51 away from the rotating shaft 10 can be referred to as the second end.

[0029] When the connecting shaft 40 abuts against the damping block 51, since the damping block 51 is located between the connecting shaft 40 and the slide groove 31, the connecting shaft 40 can abut against the inner wall of the damping block 51 and the slide groove 31 respectively, which can enhance the limiting effect on the connecting shaft 40.

[0030] In this embodiment of the application, since the fixed bracket 30 is provided with a sliding groove 31, and the damping block 51 included in the limiting component 50 is located between the connecting shaft 40 and the sliding groove 31, the limiting effect on the connecting shaft 40 can be better, thereby enhancing the limiting effect on the swing arm 20.

[0031] In addition, when the swing arm 20 is in the folded state, the end of the connecting shaft 40 abuts against the side wall of the slide groove 31 near the rotating shaft 10 (i.e., the first side wall) and the end of the damping block 51 near the rotating shaft 10 (i.e., the first end). This causes the side wall of the slide groove 31 near the rotating shaft 10 (i.e., the first side wall) and the end of the damping block 51 near the rotating shaft 10 (i.e., the first end) to exert force on the end of the connecting shaft 40. Under the action of this force, the limiting effect on the connecting shaft 40 can be further enhanced, thereby further enhancing the limiting effect on the swing arm 20.

[0032] Similarly, when the swing arm 20 is in the extended state, the end of the connecting shaft 40 abuts against the side wall of the slide groove 31 away from the rotating shaft 10 (i.e., the second side wall) and the end of the damping block 51 away from the rotating shaft 10 (i.e., the second end). This causes the side wall of the slide groove 31 away from the rotating shaft 10 (i.e., the second side wall) and the end of the damping block 51 away from the rotating shaft 10 (i.e., the second end) to exert force on the end of the connecting shaft 40. Under the action of this force, the limiting effect on the connecting shaft 40 can be further enhanced, thereby further enhancing the limiting effect on the swing arm 20.

[0033] Optionally, when the swing arm 20 is in the folded state, the end of the connecting shaft 40 is press-fitted with the side wall of the slide groove 31 near the rotating shaft 10 (i.e., the first side wall) and the end of the damping block 51 near the rotating shaft 10 (i.e., the first end); when the swing arm 20 is in the unfolded state, the end of the connecting shaft 40 is press-fitted with the side wall of the slide groove 31 away from the rotating shaft 10 (i.e., the second side wall) and the end of the damping block 51 away from the rotating shaft 10 (i.e., the second end). This increases the difficulty of moving the end of the connecting shaft 40, that is, increases the stability between the end of the connecting shaft 40 and the slide groove 31, enhances the limiting effect on the connecting shaft 40, and further enhances the limiting effect on the swing arm 20.

[0034] In addition, this embodiment can reduce the gap between the end of the connecting shaft 40 and the slide groove 31 and the damping block 51, thereby achieving the effect of zero gap between the end of the connecting shaft 40 and the slide groove 31 and the damping block 51, thereby reducing the volume of the entire hinge assembly.

[0035] It should be noted that only when the swing arm 20 receives a force, causing it to rotate around the pivot 10, and the force on the swing arm 20 is greater than the damping force threshold, can the end of the connecting shaft 40 move along the extension direction of the slide groove 31, thereby allowing the swing arm 20 to switch between the folded and unfolded states. The specific value of the aforementioned damping force threshold is not limited here; for example, the damping force threshold can be the value corresponding to the force exerted on the end of the connecting shaft 40 by at least one of the slide groove 31 and the damping block 51.

[0036] The connecting shaft 40 can also be referred to as the swing arm cam shaft.

[0037] As an optional implementation, see [link to implementation details]. Figures 4 to 6 The bottom wall of the slide 31 is provided with a groove 311, and the damping block 51 is provided with a protrusion 52, which is embedded in the groove 311. The protrusion 52 rotates relative to the groove 311 to drive the damping block 51 to rotate relative to the fixed bracket 30.

[0038] When the swing arm 20 is in the folded state, the end of the connecting shaft 40 abuts against the top wall of the slide 31, the side wall of the slide 31 near the rotating shaft 10 (i.e., the first side wall), and the end of the damping block 51 near the rotating shaft 10 (i.e., the first end). The top wall of the slide 31 is opposite to the bottom wall of the slide 31 and is connected to the side wall of the slide 31 near the rotating shaft 10 (i.e., the first side wall) and the side wall of the slide 31 away from the rotating shaft 10 (i.e., the second side wall).

[0039] When the swing arm 20 is in the unfolded state, the end of the connecting shaft 40 abuts against the top wall of the slide groove 31, the side wall of the slide groove 31 away from the rotating shaft 10 (i.e., the second side wall), and the end of the damping block 51 away from the rotating shaft 10 (i.e., the second end).

[0040] The chute 31 includes a first sidewall, a second sidewall, a top wall, and a bottom wall. The top wall and the bottom wall are arranged opposite to each other, and the first sidewall and the second sidewall are arranged opposite to each other. The first sidewall is connected to the first end of the top wall and the first end of the bottom wall, respectively, and the second sidewall is connected to the second end of the top wall and the second end of the bottom wall, respectively.

[0041] The damping block 51 is provided with a protrusion 52, which can be embedded in the groove 311 and can rotate relative to the groove 311 to drive the damping block 51 to rotate relative to the fixed bracket 30. The above structure can be understood as the damping block 51 and the protrusion 52 forming a seesaw structure.

[0042] Optionally, the damping block 51 and the protrusion 52 can be integrally formed, which can enhance the connection strength between the damping block 51 and the protrusion 52.

[0043] In this embodiment of the application, when the swing arm 20 is in the folded state, the end of the connecting shaft 40 abuts against the top wall of the slide groove 31, the side wall of the slide groove 31 near the rotating shaft 10 (i.e., the first side wall), and the end of the damping block 51 near the rotating shaft 10 (i.e., the first end). That is, the top wall of the slide groove 31, the side wall of the slide groove 31 near the rotating shaft 10 (i.e., the first side wall), and the end of the damping block 51 near the rotating shaft 10 (i.e., the first end) can all exert force on the end of the connecting shaft 40, which can further enhance the limiting effect on the end of the connecting shaft 40.

[0044] Similarly, when the swing arm 20 is in the extended state, the end of the connecting shaft 40 abuts against the top wall of the slide groove 31, the side wall of the slide groove 31 away from the rotating shaft 10 (i.e., the second side wall), and the end of the damping block 51 away from the rotating shaft 10 (i.e., the second end). That is, the top wall of the slide groove 31, the side wall of the slide groove 31 away from the rotating shaft 10 (i.e., the second side wall), and the end of the damping block 51 away from the rotating shaft 10 (i.e., the second end) all exert force on the end of the connecting shaft 40, which can further enhance the limiting effect on the end of the connecting shaft 40.

[0045] As an optional implementation, when the swing arm 20 is in the folded state, the angle between the surface of the damping block 51 facing the bottom wall of the slide groove 31 and the bottom wall of the slide groove 31 is a first angle; when the swing arm 20 is in the unfolded state, the angle between the surface of the damping block 51 facing the bottom wall of the slide groove 31 and the bottom wall of the slide groove 31 is a second angle, and the second angle is greater than the first angle.

[0046] Among them, such as Figure 5 As shown, the first included angle can be the angle between the damping block 51 and the bottom wall of the slide groove 31, such as... Figure 6 As shown, the second included angle can be the angle between the damping block 51 and the bottom wall of the slide groove 31, then it is obvious that... Figure 6 The second included angle is greater than Figure 5 The first included angle.

[0047] In this embodiment, when the swing arm 20 is in the extended state, the second included angle between the surface of the damping block 51 facing the bottom wall of the slide 31 and the bottom wall of the slide 31 is greater than the first included angle between the surface of the damping block 51 facing the bottom wall of the slide 31 and the bottom wall of the slide 31 when the swing arm 20 is in the folded state. That is, the damping block 51 is in an inclined state, and the inclination of the damping block 51 when the swing arm 20 is in the extended state is greater than the inclination of the damping block 51 when the swing arm 20 is in the folded state. This increases the difficulty for the end of the connecting shaft 40 to slide towards the side wall of the slide 31 near the rotating shaft 10, further enhancing the stability between the end of the connecting shaft 40 and the slide 31 and the damping block 51, that is, further enhancing the limiting effect on the connecting shaft 40.

[0048] It should be noted that the above implementation methods can also be described in the following description for a more complete explanation of the above implementation methods.

[0049] See Figure 5 As shown, when the swing arm 20 is in the folded state, the distance between the end of the damping block 51 near the pivot 10 (i.e., the first end) and the bottom wall of the slide groove 31 is less than the distance between the end of the damping block 51 away from the pivot 10 (i.e., the second end) and the bottom wall of the slide groove 31.

[0050] See Figure 6 As shown, when the swing arm 20 is in the unfolded state, the distance between the end of the damping block 51 near the rotating shaft 10 (i.e., the first end) and the bottom wall of the slide groove 31 is greater than the distance between the end of the damping block 51 away from the rotating shaft 10 (i.e., the second end) and the bottom wall of the slide groove 31.

[0051] In this embodiment, since the damping block 51 and the protrusion 52 can form a seesaw structure, and when the swing arm 20 is in the folded state, the distance between the end of the damping block 51 near the pivot 10 and the bottom wall of the slide groove 31 is less than the distance between the end of the damping block 51 away from the pivot 10 and the bottom wall of the slide groove 31. That is, the height of the end of the damping block 51 near the pivot 10 within the slide groove 31 is lower than the height of the end of the damping block 51 away from the pivot 10 within the slide groove 31. The end away from the rotating shaft 10 is raised, while the end of the damping block 51 near the rotating shaft 10 is lowered. That is, the surface of the damping block 51 facing the bottom wall of the slide 31 is now a slope with gradually increasing height along the direction from the end of the damping block 51 near the rotating shaft 10 to the end of the damping block 51 away from the rotating shaft 10. This further increases the difficulty for the end of the connecting shaft 40 to slide towards the side wall of the slide 31 away from the rotating shaft 10, and further enhances the stability between the end of the connecting shaft 40 and the slide 31 and the damping block 51.

[0052] Optionally, see Figure 5 , Figure 5 When the swing arm 20 is in the folded state, the end of the connecting shaft 40 is on the left side of the damping block 51. The damping block 51 is in a pre-compression state due to the pressure of the end of the connecting shaft 40. The contact surface between the damping block 51 and the end of the connecting shaft 40 is lower on the left and higher on the right. The end of the connecting shaft 40 tends to move to the left under the force. At the same time, if the end of the connecting shaft 40 moves to the right, a certain amount of power needs to be provided, which can prevent the end of the connecting shaft 40 from sliding freely in the slide groove 31, thereby increasing the stability of the connection.

[0053] When the swing arm 20 switches from the unfolded state to the folded state, that is, when the external force exceeds the damping force threshold, the swing arm 20 drives the end of the connecting shaft 40 to move within the slide groove 31, eventually reaching... Figure 6 As shown in the figure, and as the swing arm 20 drives the end of the connecting shaft 40 to move within the slide groove 31, the top wall of the slide groove 31 can continuously provide a downward pressure on the end of the connecting shaft 40, thereby ensuring that the end of the connecting shaft 40 and the slide groove 31 are always in a zero-gap state.

[0054] Simultaneously, when the swing arm 20 is in the extended state, the distance between the end of the damping block 51 near the pivot 10 and the bottom wall of the slide groove 31 is greater than the distance between the end of the damping block 51 away from the pivot 10 and the bottom wall of the slide groove 31; that is, the height of the end of the damping block 51 near the pivot 10 within the slide groove 31 is higher than the height of the end of the damping block 51 away from the pivot 10 within the slide groove 31, causing the end of the damping block 51 away from the pivot 10 to be tilted down, and the damping block 51... The end near the rotating shaft 10 is raised, that is, the surface of the damping block 51 facing the bottom wall of the slide 31 is now a slope with gradually increasing height along the direction from the end of the damping block 51 away from the rotating shaft 10 to the end of the damping block 51 near the rotating shaft 10, thereby further increasing the difficulty of the end of the connecting shaft 40 near the rotating shaft 10 sliding towards the side wall of the slide 31 near the rotating shaft 10, and further enhancing the stability between the end of the connecting shaft 40 and the slide 31 and the damping block 51.

[0055] Optionally, see Figure 6 When the swing arm 20 is in the extended state, the end of the connecting shaft 40 is located to the right of the damping block 51. The damping block 51 is in a pre-compression state due to the pressure of the end of the connecting shaft 40. The contact surface between the damping block 51 and the end of the connecting shaft 40 is higher on the left and lower on the right, forming a large inclined plane. The end of the connecting shaft 40 tends to move to the right under the force. At the same time, if the end of the connecting shaft 40 moves to the left, a certain amount of power needs to be provided so that the end of the connecting shaft 40 cannot slide freely. At the same time, it can also provide an unfolding holding force to the hinge assembly, which can prevent the end of the connecting shaft 40 from sliding freely in the slide groove 31, thereby increasing the stability of the connection.

[0056] When the swing arm 20 switches from the unfolded state to the folded state, that is, when the external force exceeds the damping force threshold, the swing arm 20 drives the end of the connecting shaft 40 to move within the slide groove 31, eventually reaching... Figure 5 As shown in the figure, and as the swing arm 20 drives the end of the connecting shaft 40 to move within the slide groove 31, the top wall of the slide groove 31 can continuously provide a downward pressure on the end of the connecting shaft 40, thereby ensuring that the end of the connecting shaft 40 and the slide groove 31 are always in a zero-gap state.

[0057] As an optional implementation, see [link to implementation details]. Figures 4 to 6 The protrusion 52 is located on the surface of the damping block 51 facing the bottom wall of the slide groove 31, and the protrusion 52 is disposed close to the side wall of the slide groove 31 away from the rotating shaft 10.

[0058] In this embodiment, the protrusion 52 is not located in the middle of the surface of the damping block 51 facing the bottom wall of the slide groove 31, but is located near the side wall of the slide groove 31 away from the rotating shaft 10. In this way, the damping force that the swing arm 20 needs to resist in the unfolded state is less than the damping force that the swing arm 20 needs to resist in the folded state, thereby facilitating the switching of the swing arm 20 from the unfolded state to the folded state, which makes it easier to fold the swing arm 20.

[0059] As an optional implementation, see [link to implementation details]. Figure 5 The fixed bracket 30 includes a bracket body 32 and a pressure plate 33. The bracket body 32 and the pressure plate 33 are connected, and the bracket body 32 and the pressure plate 33 enclose each other to form the sliding groove 31.

[0060] The connection method between the support body 32 and the pressure plate 33 is not limited here. Optionally, the support body 32 and the pressure plate 33 can be detachably connected.

[0061] Among them, the bracket body 32 can also be called the middle frame fixing bracket, and the pressure plate 33 can be called the sliding groove pressure plate 33.

[0062] In this embodiment, the bracket body 32 and the pressure plate 33 can be processed separately, and then the bracket body 32 and the pressure plate 33 are used to form a sliding groove 31, thereby improving the assembly efficiency of the sliding groove 31. At the same time, when the bracket body 32 and the pressure plate 33 are damaged, only the bracket body 32 or the pressure plate 33 needs to be replaced, without replacing the entire fixed bracket 30, thus reducing the replacement cost.

[0063] As an optional implementation, the support body 32 and the pressure plate 33 are integrally formed.

[0064] In this embodiment, the support body 32 and the pressure plate 33 are integrally formed, thereby enhancing the connection strength between the support body 32 and the pressure plate 33, that is, enhancing the connection strength of the slide groove 31, thereby extending the service life of the slide groove 31.

[0065] As an optional implementation, see [link to implementation details]. Figure 4 The hinge assembly further includes a spring plate group 60 and a movable bracket 70. The spring plate group 60 includes a plurality of spring plates 61. The movable bracket 70 includes a first bracket portion 71 and a second bracket portion 72 arranged at intervals. The swing arm 20 is partially located between the first bracket portion 71 and the second bracket portion 72. The rotating shaft 10 is sequentially inserted into the first bracket portion 71, the first end of the swing arm 20, the second bracket portion 72, and each spring plate 61 included in the spring plate group 60.

[0066] While the swing arm 20 rotates around the pivot 10, it can also move along the length of the pivot 10, which causes the swing arm 20 to have an impact force on the movable support 70. Under the action of the impact force, the movable support 70 is easily moved.

[0067] In this embodiment, when the swing arm 20 moves along the length of the pivot 10, and the second support portion 72 in the movable bracket 70 applies an impact force to each of the spring pieces 61 in the spring piece group 60, each of the spring pieces 61 in the spring piece group 60 will deform, thereby giving the spring piece 61 a rebound force. Under the action of the rebound force, damping can be provided to prevent the swing arm 20 from continuing to move along the length of the pivot 10, that is, it can limit the movement of the swing arm 20 and the movable bracket 70.

[0068] It should be noted that the number and specific structure of the shrapnel 61 are not limited here.

[0069] As an optional implementation, see [link to implementation details]. Figure 7 The spring piece 61 includes a first connecting part 611, a connecting piece 612, and a second connecting part 613. The first connecting part 611 is connected to the second connecting part 613 through the connecting piece 612. Both the first connecting part 611 and the second connecting part 613 are provided with connecting through holes 614 for connecting to the rotating shaft 10, and the connecting piece 612 is an arc-shaped connecting piece.

[0070] In this embodiment, since both the first connecting portion 611 and the second connecting portion 613 have connecting through holes 614 for connecting with the rotating shaft 10, a rotating shaft 10 can pass through each of the connecting through holes 614 on the first connecting portion 611 and the second connecting portion 613. That is, the spring piece 61 can communicate with two rotating shafts 10, and a swing arm 20 can be connected to each rotating shaft 10. This enhances the foldability of the hinge assembly. At the same time, the connecting piece 612 is an arc-shaped connecting piece, which makes the spring piece 61 easier to bend under the action of force, thereby providing a more convenient rebound force.

[0071] It should be noted that the thickness of the spring piece 61 can be L, and the rebound force that each spring piece 61 can provide can be F. Thus, when n spring pieces 61 are stacked in sequence, the rebound force provided can be nF.

[0072] As an optional implementation, the plurality of spring pieces 61 are stacked sequentially on the second support portion 72.

[0073] In this embodiment, since any two adjacent spring pieces 61 are stacked sequentially, the gap between the spring pieces 61 can be reduced, thereby reducing the volume occupied by the multiple spring pieces 61 and thus reducing the volume of the entire hinge assembly. At the same time, since any two adjacent spring pieces 61 are stacked sequentially, the rebound force provided by the multiple spring pieces 61 is all along the same direction, thereby further enhancing the limiting effect on the swing arm 20.

[0074] It should be noted that the structure of each spring piece 61 can be exactly the same, which can improve the fit between the spring pieces 61 and further reduce the gap between the spring pieces 61.

[0075] As an optional implementation, see [link to implementation details]. Figures 1 to 4 The hinge assembly further includes a plurality of friction plates 80, which are stacked sequentially and located between the first support portion 71 and the second support portion 72. The rotating shaft 10 is sequentially inserted into the first support portion 71, the first end of the swing arm 20, each of the plurality of friction plates 80, the second support portion 72, and each of the spring plates 61 included in the spring plate group 60.

[0076] In this embodiment, multiple friction plates 80 are stacked sequentially, so that there is friction between any two adjacent friction plates 80, thereby providing damping to prevent the end of the connecting shaft 40 from moving along the slide groove 31, and thus enhancing the limiting effect on the connecting shaft 40.

[0077] It should be noted that, see Figure 2 The hinge assembly provided in this application embodiment may further include a synchronous swing arm 81, a middle frame fixing bracket 82, a sliding swing arm 83, a door panel 84, a base plate 85, a synchronous slider 86, and a hinge cover 87. The base plate 85 can serve as an assembly reference, meaning that all the above components can be mounted on the base plate 85. The rotating shaft 10 can serve as a rotation reference and can pass through the synchronous swing arm 81, the sliding swing arm 83, the synchronous slider 86, the synchronous swing arm 81, the friction plate 80, etc. in sequence.

[0078] When the swing arm switches between the folded and unfolded states, the synchronous swing arm 81 and the sliding swing arm 83 can rotate, and the synchronous swing arm 81 and the synchronous slider 86 are engaged by the cam surface, so that the synchronous slider 86 and the sliding swing arm 83 can move along the length direction of the rotating shaft 10.

[0079] In addition, when the hinge assembly is applied in an electronic device, the electronic device may include a middle frame. The sliding arm 83 can drive the middle frame fixing bracket 82 to slide the middle frame. The spring plate group 60 can generate a rebound force under the impact force of the rotating shaft 10, thereby generating damping for the swing arm to move along the length direction of the rotating shaft 10, and generating friction between the friction plate 80 and the synchronous swing arm 81, so that there is damping during the hinge rotation. The magnitude of the damping can be determined by the stiffness of the spring plate group 60 and the amount of sliding of the rotating shaft 10.

[0080] This application also provides an electronic device including the hinge assembly in the above embodiments. Since the electronic device provided in this application includes the hinge assembly in the above embodiments, it has the same beneficial technical effects as the above embodiments. The specific structure of the hinge assembly can be found in the relevant descriptions in the above embodiments, and will not be repeated here.

[0081] When the hinge assembly is applied to the electronic device in the embodiments of this application, the electronic device may also include two middle frames and a flexible screen. The flexible screen can cover the two middle frames, and the pivot 10, swing arm 20, fixed bracket 30, connecting shaft 40 and limiting component 50 can form a swing arm assembly. The hinge assembly may include two swing arm assemblies, and the two middle frames are connected to the two swing arm assemblies one by one. In this way, through the unfolding and folding of the two swing arm assemblies, the flexible screen can be switched between the unfolded state and the folded state by the two middle frames.

[0082] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0083] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A hinge assembly, characterized in that, include: The device includes a pivot, a swing arm, a fixed bracket, a connecting shaft, and a limiting assembly. The limiting assembly is mounted on the fixed bracket. A first end of the swing arm passes through the pivot and can rotate around the pivot to switch between a folded state and an unfolded state. A second end of the swing arm passes through the connecting shaft and is slidably connected to the fixed bracket via the connecting shaft. The end of the connecting shaft engages with the limiting assembly to ensure that the swing arm remains relatively stationary relative to the fixed bracket in both the unfolded and folded states. The limiting component includes a damping block. The fixed bracket has a sliding groove on one side facing the swing arm. The extension direction of the sliding groove is the same as the extension direction of the swing arm. The damping block is located between the connecting shaft and the sliding groove. The connecting shaft abuts against the damping block. The damping block can rotate relative to the fixed bracket. When the swing arm is in the folded state, the end of the connecting shaft abuts against the side wall of the slide groove near the rotating shaft and the end of the damping block near the rotating shaft, respectively. When the swing arm is in the unfolded state, the end of the connecting shaft abuts against the side wall of the slide groove away from the rotating shaft and the end of the damping block away from the rotating shaft, respectively. The bottom wall of the slide is provided with a groove, and the damping block is provided with a protrusion, which is embedded in the groove. The protrusion rotates relative to the groove to drive the damping block to rotate relative to the fixed bracket.

2. The hinge assembly according to claim 1, characterized in that, When the swing arm is in the folded state, the end of the connecting shaft abuts against the top wall of the slide, the side wall of the slide near the rotating shaft, and the end of the damping block near the rotating shaft, respectively. The top wall of the slide is opposite to the bottom wall of the slide and is connected to the side wall of the slide near the rotating shaft and the side wall of the slide away from the rotating shaft, respectively. When the swing arm is in the extended state, the end of the connecting shaft abuts against the top wall of the slide groove, the side wall of the slide groove away from the rotating shaft, and the end of the damping block away from the rotating shaft.

3. The hinge assembly according to claim 1, characterized in that, When the swing arm is in the folded state, the angle between the surface of the damping block facing the bottom wall of the slide and the bottom wall of the slide is a first angle; when the swing arm is in the unfolded state, the angle between the surface of the damping block facing the bottom wall of the slide and the bottom wall of the slide is a second angle, and the second angle is greater than the first angle.

4. The hinge assembly according to claim 1, characterized in that, The protrusion is located on the surface of the damping block facing the bottom wall of the slide, and the protrusion is disposed near the side wall of the slide away from the rotating shaft.

5. The hinge assembly according to claim 1, characterized in that, The fixed bracket includes a bracket body and a pressure plate, the bracket body and the pressure plate are connected, and the bracket body and the pressure plate enclose each other to form the sliding groove.

6. The hinge assembly according to any one of claims 1 to 5, characterized in that, The hinge assembly further includes a spring sheet group and a movable bracket. The spring sheet group includes multiple spring sheets, and the movable bracket includes a first bracket portion and a second bracket portion arranged at intervals. The swing arm portion is located between the first bracket portion and the second bracket portion. The rotating shaft passes through the first bracket portion, the first end of the swing arm, the second bracket portion, and each spring sheet included in the spring sheet group in sequence.

7. The hinge assembly according to claim 6, characterized in that, The spring includes a first connecting part, a connecting piece, and a second connecting part. The first connecting part is connected to the second connecting part through the connecting piece. Both the first connecting part and the second connecting part are provided with connecting through holes for connecting to the rotating shaft, and the connecting piece is an arc-shaped connecting piece.

8. The hinge assembly according to claim 6, characterized in that, The multiple spring pieces are stacked sequentially on the second support portion.

9. The hinge assembly according to claim 6, characterized in that, The hinge assembly also includes a plurality of friction plates, which are stacked sequentially and located between the first support portion and the second support portion. The rotating shaft is sequentially inserted into the first support portion, the first end of the swing arm, each of the plurality of friction plates, the second support portion, and each of the springs included in the spring plate group.

10. An electronic device, characterized in that, The hinge assembly includes any one of claims 1 to 9.

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