Hinge assembly and electronic equipment

Abstract

The invention discloses a hinge assembly and electronic equipment. The hinge assembly comprises a base, a first swing arm, a second swing arm and a synchronous sliding block. A first rotating part of the first swing arm is rotationally connected with the base, and a first spiral groove is formed in the first rotating part. A second rotating part of the second swing arm is rotationally connected with the base, and a second spiral groove is formed in the second rotating part. The synchronous sliding block can slide relative to the base, and the synchronous sliding block is provided with a first protruding part connected into the first spiral groove in a sliding mode and further provided with a second protruding part connected into the second spiral groove in a sliding mode. When the first swing arm and the second swing arm are in a flattened state, the surfaces, facing the screen, of the first rotating part and the second rotating part are of a plane structure. And / or the surfaces, facing the screen, of the first convex part and the second convex part are of plane structures. According to the hinge assembly, gaps formed by the parts used for achieving the swing arm synchronization function are small, so that the supporting performance of the hinge assembly on a screen is improved, and it is guaranteed that the screen has the good impact resistance.

Description

Technical Field

[0001] This application relates to the technical field of hinge assemblies, and more specifically, to a hinge assembly for foldable electronic devices. Background Technology

[0002] Foldable electronic devices typically have two housings connected by a hinge assembly, allowing them to rotate relative to each other and switch between a folded and flattened state. The hinge assembly usually includes a synchronization mechanism to ensure that the two housings rotate synchronously in opposite directions.

[0003] In related technologies, the gaps between the components used to form the synchronization mechanism are relatively large, resulting in poor support for the screen and poor impact resistance of the screen at the synchronization mechanism. Summary of the Invention

[0004] The purpose of this application is to provide a hinge assembly and an electronic device, wherein the gaps formed by the components used to realize the arm synchronization function in the hinge assembly are small, thereby improving the support of the hinge assembly for the screen and ensuring that the screen has better impact resistance.

[0005] In one aspect, this application provides a hinge assembly, including a base, a first swing arm, a second swing arm, and a synchronous slider.

[0006] The first swing arm has a first rotating part, which is rotatably connected to the base. The first rotating part is provided with a first spiral groove that extends spirally along a first direction; the first direction is the axial direction of the hinge assembly.

[0007] The second swing arm has a second rotating part, which is rotatably connected to the base. The second rotating part is provided with a second spiral groove that extends spirally along the first direction.

[0008] The synchronous slider can slide relative to the base along a first direction. The synchronous slider has a first protrusion that is slidably connected in a first spiral groove, and a second protrusion that is slidably connected in a second spiral groove. Under the action of the synchronous slider, the first swing arm and the second swing arm can rotate synchronously and switch between a folded state and a flattened state.

[0009] Specifically, when the first swing arm and the second swing arm are in a flattened state, the surfaces of the first rotating part and the second rotating part facing the screen are planar structures; and / or, the surfaces of the first protrusion and the second protrusion facing the screen are planar structures.

[0010] In the hinge assembly of this application, when the first and second swing arms are in the flattened state, the surfaces of the first rotating part, the first protrusion, the second rotating part, and the second protrusion facing the screen can be entirely or partially planar. Compared to hinge assemblies in related technologies, this design allows for a larger contact area between the components used for synchronization and the screen, enabling more thorough contact and thus providing better support for the screen. Furthermore, on the side of the hinge assembly that supports the screen, the gaps between the components are smaller, resulting in fewer unsupported areas on the screen and ensuring its impact resistance. When the hinge assembly of this application is used in foldable electronic devices, it demonstrates good ability to maintain its mechanical structure under various external impact forces during ball drop tests and pen drop tests, exhibiting superior impact resistance.

[0011] Furthermore, since the surfaces of the first rotating part, the first protrusion, the second rotating part, and the second protrusion facing the screen can all be planar or partially planar, this actually increases the thickness of the component. This not only increases the structural strength of the component itself, but also increases the area of ​​the spiral surface if the rotating part and the protrusion are engaged by a spiral surface. This improves the stability of the spiral surface engagement between the components and reduces wear on the spiral surface. When the hinge assembly in this application is used in foldable electronic devices, this helps to improve the user's feel when folding the shell.

[0012] In one possible design, when the first and second swing arms are in a flattened state, the surfaces of the first rotating part, the second rotating part, the first protrusion, and the second protrusion facing the screen are coplanar.

[0013] The surfaces of these four parts facing the screen are on the same plane. This design avoids irregular structures such as ridges on the surfaces of the rotating and protruding parts facing the screen, allowing the rotating and protruding parts to form a uniform and flat support surface for the screen. When the screen is impacted, the impact force can be evenly transmitted to the hinge assembly, preventing excessive pressure in local areas of the support surface formed by the rotating and protruding parts from puncturing or damaging the screen.

[0014] In one possible design, a first clearance groove is formed near the first protrusion of the synchronous slider, and a second clearance groove is formed near the second protrusion of the synchronous slider. The first rotating part includes a first component and a second component, which are respectively provided with a first helical surface and a second helical surface for enclosing and forming the first helical groove. The second rotating part includes a third component and a fourth component, which are respectively provided with a third helical surface and a fourth helical surface for enclosing and forming the second helical groove. When the first swing arm and the second swing arm are in the folded state, part of the first component extends into the first clearance groove, and part of the third component extends into the second clearance groove.

[0015] By designing a first and a second clearance groove on the synchronous slider, the synchronous slider can avoid the first and third components when the first and second swing arms rotate to the folded state. Compared with related technologies, when solving the same interference problem, this application does not require openings in the first and third components, thus ensuring the integrity of the first and third components. When the first and second swing arms are in the flattened state, the number of gaps in the hinge assembly is reduced, which decreases the portion of the screen that is suspended, thereby providing better support for the screen and improving its impact resistance.

[0016] In one possible design, when the first and second swing arms are in the folded state, the first component abuts against the wall of the first clearance groove, and the third component abuts against the wall of the second clearance groove.

[0017] The synchronous slider has a "three-in-one" effect: first, it performs its basic function, enabling the first and second swing arms to rotate synchronously; second, it can act as a stop, controlling the folding angle of the first and second swing arms to prevent them from over-folding; and third, it can improve the impact resistance of the hinge assembly. Since the first and second swing arms can also abut against the synchronous slider, the impact force on the first and second swing arms can be transmitted to the base through the synchronous slider, thereby adding a stress point and preventing excessive pressure on local parts of the base from causing damage.

[0018] In one possible design, the first clearance groove has a wedge-shaped cross-section. The first component includes a first plane and a second plane inclined relative to the first plane. When the first swing arm is in the flattened state, the first plane faces the screen. When the first swing arm is in the folded state, the second plane abuts against the groove wall of the first clearance groove. The second clearance groove has a wedge-shaped cross-section. The third component includes a third plane and a fourth plane inclined relative to the third plane. When the second swing arm is in the flattened state, the third plane faces the screen. When the second swing arm is in the folded state, the fourth plane abuts against the groove wall of the second clearance groove.

[0019] This design makes the second plane similar to the diagonal bracing structure in the field of architecture, which enables the first component to have high support strength without making the body of the first component too thick. As a result, the first clearance groove does not need to be too large, and its general outline is similar to that of the first component to meet the clearance requirements, thereby ensuring the body thickness and structural strength of the synchronous slider at the first clearance groove.

[0020] Furthermore, when the first swing arm is in the folded state, the second plane of the first component abuts against the wall of the wedge-shaped first clearance groove. This allows for effective surface contact between the first component and the synchronous slider, enabling the first component to evenly transfer the impact force to the synchronous slider. This prevents excessive local pressure from damaging the first component or the synchronous slider, thereby ensuring the impact resistance of the hinge assembly. Correspondingly, the technical principles of the third component and the second clearance groove are similar and will not be elaborated upon here.

[0021] In one possible design, the first plane and the second plane are connected by a chamfer; the third plane and the fourth plane are connected by a chamfer.

[0022] The first plane of the first component is connected to the second plane by a chamfer, thus preventing the end of the first component from having a sharp "blade" structure, and consequently preventing the first component from cutting or piercing the screen. Correspondingly, the technical principle of the third component is similar, and will not be elaborated here.

[0023] In one possible design, the first protrusion has two fifth helical surfaces arranged opposite to each other along a first direction, the two fifth helical surfaces respectively engaging with the first helical surface and the second helical surface; the second protrusion has two sixth helical surfaces arranged opposite to each other along the first direction, the two sixth helical surfaces respectively engaging with the groove walls of the third helical surface and the fourth helical surface.

[0024] This allows the first protrusion and the groove wall of the first spiral groove, as well as the groove wall of the second protrusion and the second spiral groove, to fit tightly against each other and make full contact, thereby ensuring that the torque of the synchronous slider can be accurately transmitted.

[0025] In one possible design, the first swing arm includes a first sub-swing arm and a second sub-swing arm that are spliced ​​together. A first component is disposed on the first sub-swing arm, and a second component is disposed on the second sub-swing arm. The first component and the second component are spliced ​​together to form a first rotating part. The second swing arm includes a third sub-swing arm and a fourth sub-swing arm that are spliced ​​together. A third component is disposed on the third sub-swing arm, and a fourth component is disposed on the fourth sub-swing arm. The third component and the fourth component are spliced ​​together to form a second rotating part.

[0026] Designing the first and second swing arms as detachable parts makes it easier and more convenient to assemble the first protrusion into the first spiral groove and the second protrusion into the second spiral groove.

[0027] In one possible design, one of the first and second sub-swing arms is provided with a first positioning pin, and the other is provided with a first positioning hole. One of the third and fourth sub-swing arms is provided with a second positioning pin, and the other is provided with a second positioning hole.

[0028] This allows for quick alignment when the first and second sub-swing arms are spliced ​​together, and also allows for quick alignment when the third and fourth sub-swing arms are spliced ​​together.

[0029] In one possible design, when the first and second swing arms are in a flattened state, the opposing surfaces of the first and second rotating parts are planar structures.

[0030] The thickness of the first rotating part and the second rotating part was further increased, thereby increasing their structural strength and increasing the area of ​​the spiral surface, which improved the stability of their cooperation with the spiral surface of the protrusion.

[0031] In one possible design, the surfaces of the first and second protrusions facing away from the screen are planar structures, and the surfaces of the first and second protrusions facing away from each other are planar structures.

[0032] The thickness of the first and second protrusions was further increased, thereby increasing their structural strength and increasing the area of ​​the spiral surface, which improved the stability of their engagement with the spiral surface of the rotating part.

[0033] In one possible design, the base includes an upper base for supporting the screen, the upper base having a first notch and a second notch. When the first and second swing arms are in a flattened state, the step difference between the surface of the first rotating part and the first protrusion facing the screen and the surface of the upper base with the first notch is 0-1 mm, and the step difference between the surface of the second rotating part and the second protrusion facing the screen and the surface of the upper base with the second notch is 0-1 mm.

[0034] In one possible design, a groove is provided on the side of the synchronization slider facing away from the screen, and the groove passes through the synchronization slider along a first direction.

[0035] When the synchronizer slider slides, the groove can avoid other components on the base, or it can also form a sliding engagement with the slider on the base to guide the synchronizer slider.

[0036] In one possible design, the base is provided with a first connecting shaft and a second connecting shaft, the first rotating part is provided with a shaft hole for rotatably connecting with the first connecting shaft, and the second rotating part is provided with a shaft hole for rotatably connecting with the second connecting shaft.

[0037] The specific design of the rotational connection between the first and second swing arms and the base is presented, which has the advantages of simple structure and good stability.

[0038] In one possible design, the first protrusion is provided with a through hole that is slidably connected to the first connecting shaft, and the second protrusion is provided with a through hole that is slidably connected to the second connecting shaft.

[0039] The specific design of the sliding connection between the synchronous slider and the base is presented, which has the advantage of compact structure.

[0040] Secondly, this application also provides an electronic device including the hinge assembly of any of the above.

[0041] The electronic device in this application, because it includes the aforementioned hinge assembly, can provide good support for the screen and ensure the screen's impact resistance. When performing ball drop tests and pen drop tests, the screen has a good ability to maintain its mechanical structure under various external impact forces, and can exhibit good impact resistance performance.

[0042] In addition, some or all of the components in the hinge assembly that perform the synchronization function have greater structural strength, and if the components are engaged by a helical surface, the area of ​​the helical surface is increased, thereby improving the stability of the helical surface engagement between the components and reducing the wear of the helical surface. This helps to improve the user's feel when folding the shell.

[0043] In one possible design, the electronic device also includes a first housing, a second housing, and a screen, with a hinge assembly connecting the first housing and the second housing, and the screen disposed on one side of the first housing, the hinge assembly, and the second housing.

[0044] In one possible design, when the first and second swing arms are in a folded state, the screen is located inside the first and second housings. Attached Figure Description

[0045] Figure 1 This is an exploded view of the screen and casing of the foldable phone provided in the embodiments of this application;

[0046] Figure 2 This is a schematic diagram of the foldable phone provided in the embodiment of this application in its flattened state;

[0047] Figure 3 This is a schematic diagram of the foldable phone in the folded state provided in the embodiments of this application;

[0048] Figure 4 This is a partial schematic diagram of a hinge assembly in related technologies;

[0049] Figure 5 This is a schematic diagram of a synchronous slider in related technologies;

[0050] Figure 6 This is a schematic diagram of a hinge component in a related technology supporting a screen.

[0051] Figure 7 This is a schematic diagram of the hinge assembly provided in an embodiment of this application;

[0052] Figure 8 yes Figure 7 A partial schematic diagram of the hinge assembly in the diagram;

[0053] Figure 9 yes Figure 8 The schematic diagram shows the hinge assembly in the image, concealing the upper base and door panel.

[0054] Figure 10 yes Figure 9 Exploded view of the hinge assembly in the image;

[0055] Figure 11 This is a schematic diagram of the first and second swing arms provided in the embodiments of this application;

[0056] Figure 12 yes Figure 11 Schematic diagram of the second and fourth sub-swing arms;

[0057] Figure 13 yes Figure 11 A schematic diagram of the first and third sub-swing arms in the diagram;

[0058] Figure 14 This is a schematic diagram of the synchronization slider provided in an embodiment of this application;

[0059] Figure 15 yes Figure 14 A schematic diagram of the synchronization slider from another perspective;

[0060] Figure 16 This is a schematic diagram of the hinge assembly provided in this application supporting the screen;

[0061] Figure 17 yes Figure 8 A partial schematic diagram of the hinge assembly in the diagram;

[0062] Figure 18 This is a cross-sectional view of the hinge assembly provided in the embodiment of this application in the flattened state;

[0063] Figure 19 This is a cross-sectional view of the hinge assembly provided in the embodiment of this application during the folding process;

[0064] Figure 20 This is a cross-sectional view of the hinge assembly provided in the embodiment of this application in the folded state;

[0065] Figure 21 yes Figure 18 Enlarged view of point A in the middle;

[0066] Figure 22 yes Figure 20 Enlarged view of point B in the middle.

[0067] Figure label:

[0068] 01. Base; 02. Notch; 03. Protrusion; 04. Spiral groove; 05. Swing arm; 06. Opening; 07. Synchronous slider; 08. Door panel;

[0069] 10. Base; 11. Upper base; 111. First notch; 112. Second notch; 12. Lower base; 13. First connecting shaft; 14. Second connecting shaft;

[0070] 20. First swing arm; 21. First rotating part; 211. First component; 211a. First helical surface; 211b. First plane; 211c. Second plane; 212. Second component; 212a. Second helical surface; 22. First helical groove; 23. First sub-swing arm; 231. First positioning pin; 24. Second sub-swing arm; 241. First positioning hole; 25. Strip slider;

[0071] 30. Second swing arm; 31. Second rotating part; 311. Third component; 311a. Third helical surface; 312. Fourth component; 312a. Fourth helical surface; 32. Second helical groove; 33. Third sub-swing arm; 331. Second positioning pin; 34. Fourth sub-swing arm; 341. Second positioning hole;

[0072] 40. Synchronous slider; 41. First protrusion; 411. Fifth helical surface; 42. Second protrusion; 421. Sixth helical surface; 43. Groove; 44. First clearance groove; 45. Second clearance groove;

[0073] 51. Door panel; 52. Axle cover; 53. Connecting block; 531. Strip groove; 54. Main swing arm; 57. Cam support; 56. Elastic element;

[0074] 100, Hinge assembly; 200, First housing; 300, Second housing; 400, Screen. Detailed Implementation

[0075] The following are exemplary descriptions of relevant content that may be involved in the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0076] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0077] In the description of this application, it should be understood that the terms "upper", "lower", "side", "inner", "outer", "top", "bottom", etc., indicate the orientation or positional relationship based on the installation orientation or positional relationship, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0078] It should also be noted that in the embodiments of this application, the same reference numerals are used to represent the same component or part. For the same part in the embodiments of this application, the reference numerals may only be used to mark one part or part as an example in the figure. It should be understood that the reference numerals are also applicable to other identical parts or parts.

[0079] In the description of this application, it should be noted that the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0080] Flexible screens, with their bendable properties, are currently used in foldable electronic devices such as smartphones, tablets, smartwatches, game consoles, and wearable devices. These devices can increase display size without increasing overall volume, while also maintaining a high screen-to-body ratio and high resolution. For example, a foldable phone can be folded to the size of a traditional phone, making it easy to carry and store, while unfolding it can have the display size of a tablet, providing a larger display area and improving the user's viewing and operating experience. These features make foldable electronic devices very popular with consumers.

[0081] Figure 1 This is an exploded view of the screen 400 and the casing of the foldable mobile phone provided in the embodiments of this application. Figure 2 This is a schematic diagram of the foldable mobile phone provided in the embodiment of this application in its flattened state. Figure 3 This is a schematic diagram of the foldable phone in its folded state according to an embodiment of this application. Furthermore, for the convenience of the description of the embodiments below, an XYZ coordinate system is established for the foldable phone. Specifically, the extension direction of the rotation axis of the foldable phone is defined as the Y direction, the thickness direction of the foldable phone is defined as the Z direction, and the direction perpendicular to both the Y and Z directions is defined as the X direction.

[0082] like Figures 1-3As shown in the embodiment of this application, the electronic device is a foldable mobile phone. The foldable mobile phone includes a first housing 200, a second housing 300, a screen 400, and a hinge assembly 100. The hinge assembly 100 is connected between the first housing 200 and the second housing 300, and the screen 400 is disposed above the first housing 200, the hinge assembly 100, and the second housing 300.

[0083] The first housing 200 and the second housing 300 are used to support the screen 400 and protect the internal components of the foldable phone. The portions of the screen 400 at both ends are fixedly connected to the first housing 200 and the second housing 300, respectively. The first housing 200 can be a rigid housing, and the second housing 300 can also be a rigid housing, so that the first housing 200 and the second housing 300 can provide stable support for both ends of the screen 400.

[0084] The hinge assembly 100 can deform as the second housing 300 folds or flattens relative to the first housing 200, and prevents the second housing 300 from detaching from the first housing 200. Specifically, the two opposite sides of the hinge assembly 100 are respectively connected to the first housing 200 and the second housing 300. The hinge assembly 100 utilizes its own rotatable characteristics to allow the first housing 200 to flip relative to the second housing 300, so that the first housing 200 is folded, flattened, or in a state between folding and flattening relative to the second housing 300.

[0085] The first housing 200 and the second housing 300 can be folded or unfolded relative to each other, enabling the foldable phone provided in this embodiment to have multiple modes and meet the user's needs in different scenarios. For example, Figure 3 As shown, the first housing 200 and the second housing 300 can be folded together so that the screen 400 can fit together, allowing the foldable phone to switch to a closed mode. At this time, the foldable phone has a smaller volume, making it easier for users to store and carry it.

[0086] The first housing 200 and the second housing 300 are respectively provided with magnets at the location away from the hinge assembly 100. When the first housing 200 and the second housing 300 are in the folded state, the magnets on the two housings attract each other, which can prevent the first housing 200 and the second housing 300 from opening accidentally and ensure that the foldable phone remains closed during storage and carrying.

[0087] The first housing 200 and the second housing 300 can be in a state between folding and unfolding. For example, the first housing 200 and the second housing 300 form an angle of 90 to 120 degrees, so that the foldable phone can be switched to a usage mode that allows it to be placed on a table. At this time, the first housing 200 and the screen 400 on it can face the user, and the second housing 300 is placed on a shelf, desk, or other surface. The second housing 300 also acts like a counterweight base to ensure the stability of the foldable phone.

[0088] The first housing 200 and the second housing 300 can also be relatively flattened, for example, as Figure 1 As shown, the first housing 200 and the second housing 300 form a 180-degree angle, which enables large-screen display, provides users with richer information, and brings users a better user experience.

[0089] It is understandable that when a user holds a foldable phone, the position of the earpiece module can be defined as the top of the foldable phone, the position of the microphone module can be defined as the bottom of the foldable phone, and the two sides of the foldable phone held by the user's left and right hands can be defined as the left and right sides of the foldable phone.

[0090] In some embodiments provided in this application, the first housing 200 and the second housing 300 are arranged vertically, enabling the foldable phone to fold vertically. In other embodiments provided in this application, the first housing 200 and the second housing 300 are arranged horizontally, enabling the foldable phone to fold horizontally, for example, as... Figure 3 The situation is shown below.

[0091] The screen 400 can be a flexible screen that is foldable as a whole, or the screen 400 can be a combination of a foldable flexible screen in the middle area and rigid screens at both ends. This application does not limit the scope of the application.

[0092] The foldable phone may also include multiple modules, which can be housed inside the first housing 200 and the second housing 300. These modules may include, but are not limited to, a motherboard, processor, memory, battery, camera module, earpiece module, speaker module, microphone module, antenna module, and sensor module. This application does not specifically limit the number, type, or location of the modules in the foldable phone.

[0093] In the foldable phone provided in this application embodiment, taking a two-fold structure as an example, the foldable phone includes two shell parts (a first shell 200 and a second shell 300) and a hinge assembly 100 connecting the two shell parts; the two shell parts can rotate towards each other and stack on top of each other with the screen 400 touching each other, so that the foldable phone presents a two-layer shape, i.e. Figure 3 As shown, the foldable phone is an inward-folding foldable phone, that is, the screen 400 is located inside the first housing 200 and the second housing 300.

[0094] In another embodiment of this application, the foldable phone may also have a structure of three or more folds, that is, the foldable phone includes three or more shell parts, and two adjacent shell parts are connected by a hinge assembly 100. The two adjacent shell parts can rotate relative to each other to stack on top of each other or rotate back to back to flatten out. When the foldable phone has a structure of three or more folds, the hinge assembly 100 used in the foldable phone can be adapted to the description of the two-fold structure in this embodiment, and will not be described again in this application.

[0095] In other embodiments of this application, the electronic device includes, but is not limited to, a foldable tablet computer, a foldable handheld game console, a foldable e-reader, a foldable wearable device, etc., and may also be other electronic devices with foldable functionality that need to provide stable support for the screen 400.

[0096] As described above, the foldable phone includes a hinge assembly 100. This hinge assembly 100 not only connects the two side shells but also supports the center of the screen 400, preventing it from collapsing. To enable the two side shells of the foldable electronic device to rotate synchronously, a synchronization mechanism needs to be added to the hinge assembly 100.

[0097] In current hinge assemblies, the synchronization mechanism typically consists of a synchronization slider and a spiral groove. Due to the large gaps between the components of the synchronization mechanism in related technologies, its support for the screen is poor, resulting in low impact resistance at the synchronization mechanism. The following section will describe in detail the shortcomings of the hinge assemblies in related technologies, with reference to accompanying drawings.

[0098] Figure 4 This is a partial schematic diagram of a hinge assembly in related technologies, such as... Figure 4 As shown, in related technologies, the hinge assembly of a foldable phone mainly consists of a base 01, a swing arm 05, a synchronization mechanism, and a door panel 08. The synchronization mechanism primarily comprises a synchronization slider 07 and a spiral groove 04 formed on the swing arm 05. Due to the thickness limitations of the hinge assembly, the base 01 typically has a notch 02 to allow the synchronization mechanism to pass.

[0099] Figure 5 This is a schematic diagram of the synchronous slider 07 in the related technology, as shown below. Figure 5 As shown, the synchronous slider 07 can slide axially relative to the base 01 in the hinge assembly. The synchronous slider 07 has protrusions 03 on both sides, which are slidably disposed in the spiral grooves 04. When either side of the swing arm 05 rotates relative to the base 01, the groove wall of the spiral groove 04 of that side of the swing arm 05 pushes the protrusion 03. The protrusion 03 drives the synchronous slider 07 to slide relative to the base 01. At the same time, the protrusion 03 on the other side pushes the groove wall of the corresponding spiral groove 04, thereby causing the swing arm 05 on the other side to rotate synchronously, thus realizing the synchronous rotation of the two swing arms 05.

[0100] See also Figures 4-5 As shown, in related technologies, the outer surface of the protrusion 03 of the synchronous slider 07 is an arc-shaped curved surface, and the outer surface of the part of the swing arm 05 where the spiral groove 04 is provided is also an arc-shaped curved surface. Figure 6 This is a schematic diagram of the hinge component in the related technology supporting the screen 400. It should be noted that... Figure 6 This is a rough illustration drawn merely to illustrate the shortcomings of the hinge assembly in the related technology. When the protrusion 03 and the spiral groove 04 are engaged, the protrusion 03 and the rocker arm 05 can be considered as a single unit. Figure 6 As shown, when the swing arm 05 is in a flattened state, because the outer surfaces of the spiral groove 04 and the protrusion 03 on the swing arm 05 are arc-shaped, only the apex of the arc-shaped surface is visible. Figure 6 The area indicated by point G provides good support for the screen 400. However, large gaps remain on either side of point G, failing to provide adequate support for the screen 400. This leaves a significant portion of the screen 400 suspended in the air, resulting in poor impact resistance. Before shipping, the screen 400 typically undergoes impact testing, including ball drop and pen drop tests. These tests measure the screen 400's ability to maintain its mechanical structure under various external impacts. Due to a design flaw in the hinge component, the device performs poorly in these impact tests.

[0101] In view of this, in order to solve the above-mentioned technical problems, this application provides a hinge assembly 100 and an electronic device. The gaps formed by the components in the hinge assembly 100 that realize the arm synchronization function are small, thereby improving the support of the hinge assembly 100 for the screen 400 and ensuring that the screen 400 has better impact resistance.

[0102] The technical solution of the hinge component 100 used in the foldable mobile phone in the embodiments of this application will be described in detail below.

[0103] Figure 7 This is a schematic diagram of the hinge assembly 100 provided in an embodiment of this application. Figure 8 yes Figure 7 A partial schematic diagram of the hinge assembly 100. Figure 9 yes Figure 8 The hinge assembly 100 is shown in a schematic diagram with the upper base 11 and door panel 51 hidden. Figure 10 yes Figure 9 An exploded view of the hinge assembly 100. It should be noted that... Figure 10 The shaft cover 52 is hidden inside.

[0104] like Figures 7-10 As shown in the figure, an embodiment of this application provides a hinge assembly 100, which includes a base 10, a first swing arm 20, a second swing arm 30, and a synchronous slider 40. In addition, the hinge assembly 100 also includes a main swing arm 54, a door panel 51, a connecting block 53, a shaft cover 52, a damping assembly, etc.

[0105] Door panels 51 are mainly used to support screen 400. There are two door panels 51 arranged symmetrically with respect to the hinge assembly 100. Each door panel 51 is connected to one or more connecting blocks 53. The connecting blocks 53, as intermediate components, are mainly used to connect door panels 51, main swing arm 54, first swing arm 20, second swing arm 30, etc. The hinge cover 52 is the outermost component of the hinge assembly 100, which can protect and decorate the internal components of the hinge assembly 100.

[0106] The base 10 provides support and mounting positions for components such as the first swing arm 20, the second swing arm 30, and the synchronous slider 40. Figures 8-9 As shown, the base 10 includes an upper base 11 and a lower base 12 that are spliced ​​together. The upper base 11 is located between the two door panels 51 and cooperates with the door panels 51 to support the screen 400. To reduce the overall thickness of the hinge assembly 100, the upper base 11 also has a first notch 111 and a second notch 112. The first notch 111 and the second notch 112 are used to avoid the first rotating part 21 of the first swing arm 20, the second rotating part 31 of the second swing arm 30, and the protrusion of the synchronous slider 40. The upper base 11 and the lower base 12 are respectively provided with a convex arc surface and a concave arc surface. After the upper base 11 and the lower base 12 are spliced, the convex arc surface and the concave arc surface can surround and form an arc-shaped sliding groove. Figure 10As shown, the main swing arm 54 has an arc-shaped slider, which is slidably connected to the arc-shaped groove, allowing the main swing arm 54 to rotate relative to the base 10 and switch between a folded state and a flattened state. There are multiple main swing arms 54, and they are arranged in pairs on both sides of the base 10. It is understood that in other embodiments provided in this application, the base 10 may also be a one-piece structure, without the need for the upper base 11 and lower base 12 to be spliced ​​together.

[0107] As mentioned earlier, the connecting block 53, as an intermediate component, is mainly used to connect the door panel 51, the main swing arm 54, the first swing arm 20, the second swing arm 30, etc. Taking the first swing arm 20 side as an example, the specific design is as follows: Figure 10 As shown, the door panel 51 is fixedly connected to the connecting block 53 (not shown in the figure). The main swing arm 54 and the connecting block 53 are rotatably connected by a pin. The connecting block 53 has a strip groove 531. The first swing arm 20 has strip sliders 25 on both sides. The strip sliders 25 are slidably disposed in the strip groove 531, so that the connecting block 53 and the first swing arm 20 are slidably connected. The main swing arm 54 and the first swing arm 20 have different centers of rotation relative to the base 10. When the main swing arm 54 rotates and drives the connecting block 53 to rotate, the connecting block 53 drives the first swing arm 20 to rotate through the groove wall of the strip groove 531. The connection method between the door panel 51, the main swing arm 54, and the connecting block 53 on the side of the second swing arm 30 is similar and will not be described in detail here.

[0108] Furthermore, to enhance the damping feel of the foldable phone when folded and to achieve a proper hovering effect after folding, the hinge assembly 100 also needs to be equipped with a damping component. For example... Figure 10 As shown, the damping assembly includes an elastic element 56 and a cam support 57. The first rotating part 21 of the first swing arm 20 and the second rotating part 31 of the second swing arm 30 are provided with end face gears. When the first swing arm 20 and the second swing arm 30 rotate, the end face gears push the cam support 57, and the cam support 57 then squeezes the elastic element 56, thereby achieving the damping feel when the user folds the shell.

[0109] The technical solutions of the first swing arm 20, the second swing arm 30, and the synchronous slider 40 in the embodiments of this application will be described in detail below.

[0110] Figure 11 This is a schematic diagram of the first swing arm 20 and the second swing arm 30 provided in the embodiments of this application. Figure 12 yes Figure 11 Schematic diagram of the second sub-swing arm 24 and the fourth sub-swing arm 34. Figure 13 yes Figure 11 A schematic diagram of the first sub-swing arm 23 and the third sub-swing arm 33. It should be noted that... Figure 13 The first sub-swing arm 23 and the third sub-swing arm 33 in the middle Figure 11 The perspectives are different.

[0111] like Figures 11-13 As shown, the first swing arm 20 includes a first sub-swing arm 23 and a second sub-swing arm 24 spliced ​​together. A first component 211 is disposed on the first sub-swing arm 23, and a second component 212 is disposed on the second sub-swing arm 24. The first component 211 and the second component 212 are spliced ​​together to form a first rotating part 21, and the first component 211 and the second component 212 are respectively rotatably connected to the base 10. The second swing arm 30 includes a third sub-swing arm 33 and a fourth sub-swing arm 34 spliced ​​together. A third component 311 is disposed on the third sub-swing arm 33, and a fourth component 312 is disposed on the fourth sub-swing arm 34. The third component 311 and the fourth component 312 are spliced ​​together to form a second rotating part 31, and the third component 311 and the fourth component 312 are respectively rotatably connected to the base 10.

[0112] The first component 211 and the second component 212 are respectively provided with a first helical surface 211a and a second helical surface 212a, which are used to enclose and form a first helical groove 22. The first helical groove 22 extends helically along a first direction, wherein the first direction is the axial direction of the hinge assembly 100, i.e. Figure 11 The Y direction. The third component 311 and the fourth component 312 are respectively provided with a third helical surface 311a and a fourth helical surface 312a, which are used to enclose and form a second helical groove 32. The second helical groove 32 extends helically along the first direction.

[0113] The first helical groove 22 has the opposite helix direction to the second helical groove 32, and the pitch of the first helical groove 22 is the same as the pitch of the second helical groove 32. The opposite helix direction means that the second helical groove 32 and the first helical groove 22 are arranged in opposite directions. For example, if the first helical groove 22 is arranged clockwise, then the second helical groove 32 is arranged counterclockwise. Since the pitch of the first helical groove 22 is the same as the pitch of the second helical groove 32, when the first rotating part 21 rotates and pushes the first protrusion 41 through the groove wall of the first helical groove 22, the second protrusion 42 pushes the groove wall of the second helical groove 32, causing the second rotating part 31 to rotate by an equal angle in opposite directions relative to the base 10. This results in the first swing arm 20 and the second swing arm 30 rotating synchronously relative to the base 10.

[0114] For example Figures 12-13As shown, in one embodiment provided in this application, the second sub-swing arm 24 is provided with a first positioning pin 231, and the first sub-swing arm 23 is provided with a first positioning hole 241. The fourth sub-swing arm 34 is provided with a second positioning pin 331, and the third sub-swing arm 33 is provided with a second positioning hole 341. This allows for quick alignment when the first sub-swing arm 23 and the second sub-swing arm 24 are assembled together, and also allows for quick alignment when the third sub-swing arm 33 and the fourth sub-swing arm 34 are assembled together. The positioning pin and the positioning hole can also be interchanged. That is, in another embodiment provided in this application, the first sub-swing arm 23 is provided with a first positioning pin 231, the second sub-swing arm 24 is provided with a first positioning hole 241, the third sub-swing arm 33 is provided with a second positioning pin 331, and the fourth sub-swing arm 34 is provided with a second positioning hole 341.

[0115] The above describes an embodiment where the first swing arm 20 is assembled from disassembled parts, and an embodiment where the second swing arm 30 is assembled from disassembled parts. It is understood that in other embodiments provided in this application, the first swing arm 20 can be an integral structure, and the second swing arm 30 can also be an integral structure, without the need to be assembled from sub-swing arms.

[0116] Figure 14 This is a schematic diagram of the synchronous slider 40 provided in an embodiment of this application. Figure 15 yes Figure 14 A schematic diagram of the synchronization slider 40 from another perspective.

[0117] like Figures 14-15 As shown, the synchronous slider 40 has a first protrusion 41 slidably connected in the first helical groove 22. The first protrusion 41 has two fifth helical surfaces 411 arranged opposite to each other along a first direction. The two fifth helical surfaces 411 respectively engage with the first helical surface 211a and the second helical surface 212a. The synchronous slider 40 also has a second protrusion 42 slidably connected in the second helical groove 32. The second protrusion 42 has two sixth helical surfaces 421 arranged opposite to each other along the first direction. The two sixth helical surfaces 421 respectively engage with the groove walls of the third helical surface 311a and the fourth helical surface 312a.

[0118] The synchronous slider 40 can slide relative to the base 10 along a first direction. For example, the synchronous slider 40 can be slidably connected to the base 10 via a slide rail, or the synchronous slider 40 can also be slidably connected to the base 10 via a first connecting shaft 13 and a second connecting shaft 14. A more detailed description can be found in the embodiments described later. When the first swing arm 20 rotates relative to the base 10, the first helical surface 211a will push the fifth helical surface 411 to push the synchronous slider 40 to slide. At the same time, the sixth helical surface 421 of the synchronous slider 40 will push the fourth helical surface 312a, causing the second rotating part 31 to rotate, thereby driving the second swing arm 30 to rotate synchronously. When the second swing arm 30 rotates relative to the base 10, the third helical surface 311a will push the sixth helical surface 421 to push the synchronous slider 40 to slide. At the same time, the fifth helical surface 411 of the synchronous slider 40 will push the second helical surface 212a, causing the first rotating part 21 to rotate, thereby driving the first swing arm 20 to rotate synchronously. In any case, the synchronous slider 40 can drive the first swing arm 20 and the second swing arm 30 to rotate synchronously and switch between folded and flattened states.

[0119] Return to Figure 9 As shown, when the first swing arm 20 and the second swing arm 30 are in the flattened state, the surfaces of the first rotating part 21 and the second rotating part 31 facing the screen 400 are planar structures, as are the surfaces of the first protrusion 41 and the second protrusion 42 facing the screen 400. This design ensures that the surfaces of the first rotating part 21, the second rotating part 31, the first protrusion 41, and the second protrusion 42 facing the screen 400 provide good support for the screen 400, thus guaranteeing the screen 400's impact resistance. The advantages described above will be explained in detail below with reference to the accompanying drawings.

[0120] Figure 16 This is a schematic diagram of the hinge assembly 100 provided in this application supporting the screen 400. It should be noted that... Figure 16 This only shows a rough illustration of the hinge assembly 100 supporting the screen 400. When the first spiral groove 22 and the first rotating part 21 are engaged, the first rotating part 21 and the first protrusion 41 can be considered as a single unit. Similarly, Figure 16 The second rotating part 31 and the second protrusion 42 are also combined into a whole and displayed.

[0121] like Figure 16 As shown, when the first swing arm 20 and the second swing arm 30 are in the flattened state, the surfaces of the first rotating part 21, the first protrusion 41, the second rotating part 31, and the second protrusion 42 facing the screen 400 are planar structures. Thus, the first rotating part 21, the second rotating part 31, the first protrusion 41, and the second protrusion 42 can achieve more sufficient contact with the screen 400. Figure 6Compared with the hinge assembly in the related technology, the first rotating part 21, the first protrusion 41, the second rotating part 31 and the second protrusion 42 in the embodiment of this application have a larger contact area with the screen 400, which can provide good support for the screen 400. On the side of the hinge assembly 100 used to support the screen 400, the gaps formed between the components are smaller, so that there are fewer parts of the screen 400 that are suspended in the air, thus ensuring the impact resistance of the screen 400.

[0122] Furthermore, since the surfaces of the first rotating part 21, the first protrusion 41, the second rotating part 31, and the second protrusion 42 facing the screen 400 are planar structures, compared to curved surfaces, this actually increases the body thickness of the first rotating part 21, the first protrusion 41, the second rotating part 31, and the second protrusion 42. This not only increases their structural strength but also increases the area of ​​the spiral surface, thereby improving the stability of the spiral surface engagement between the first rotating part 21 and the first protrusion 41, the second rotating part 31, and the second protrusion 42, reducing wear on the spiral surface, and also improving the user's folding feel.

[0123] For example Figure 11 As shown, in one embodiment provided in this application, when the first swing arm 20 and the second swing arm 30 are in a flattened state, the opposing surfaces of the first rotating part 21 and the second rotating part 31 are planar structures. The opposing surfaces of the first rotating part 21 and the second rotating part 31 can be understood as... Figure 11 A surface filled with a dashed line.

[0124] In this embodiment, the thickness of the first rotating part 21 and the second rotating part 31 is further increased, thereby increasing their structural strength and increasing the area of ​​the spiral surface, which improves the stability of their cooperation with the spiral surface of the protrusion.

[0125] For example Figure 14 and Figure 15 As shown, in one embodiment provided by this application, the surfaces of the first protrusion 41 and the second protrusion 42 facing away from the screen 400 are planar structures. The surfaces of the first protrusion 41 and the second protrusion 42 that are opposite to each other are planar structures. The surfaces of the first protrusion 41 and the second protrusion 42 facing away from the screen 400 can be understood as... Figure 15 The surface filled with the vertical dashed line, the surfaces opposite to the first protrusion 41 and the second protrusion 42 can be understood as... Figure 14 and Figure 15 The surface filled with horizontal dashed lines.

[0126] In this embodiment, the body thickness of the first protrusion 41 and the second protrusion 42 is further increased, thereby increasing their structural strength and increasing the area of ​​the spiral surface, thus improving the stability of their engagement with the spiral surface of the rotating part.

[0127] In one embodiment provided in this application, the corners of two adjacent surfaces of the first protrusion 41 have chamfers, which can be beveled or rounded. The second protrusion 42, the first rotating part 21, the second rotating part 31, etc., have similar designs. In this embodiment, the above design can prevent the edges of the components from damaging the screen 400.

[0128] In another embodiment provided in this application, when the first swing arm 20 and the second swing arm 30 are in a flattened state, the surfaces of the first rotating part 21 and the second rotating part 31 facing the screen 400 are planar structures, while the surface shapes of the first protrusion 41 and the second protrusion 42 facing the screen 400 are not limited. Alternatively, in another embodiment provided in this application, when the first swing arm 20 and the second swing arm 30 are in a flattened state, the surfaces of the first protrusion 41 and the second protrusion 42 facing the screen 400 are planar structures, while the surface shapes of the first rotating part 21 and the second rotating part 31 facing the screen 400 are not limited. Compared to related technologies where the side of the synchronization mechanism facing the screen 400 is a curved surface, in this embodiment, even if only a portion of the rotating part or protrusion is a planar structure, it can still improve the support effect on the screen 400.

[0129] In one embodiment provided in this application, when the first swing arm 20 and the second swing arm 30 are in a flattened state, the first rotating part 21, the second rotating part 31, the first protrusion 41 and the second protrusion 42 are coplanar with the surface of the screen 400.

[0130] In this embodiment, the surfaces of the first rotating part 21, the second rotating part 31, the first protrusion 41, and the second protrusion 42 facing the screen 400 are all planar structures, and these four surfaces facing the screen 400 are also on the same plane. This design can avoid irregular structures such as protrusions on the surfaces of the rotating parts and protrusions facing the screen 400, so that the rotating parts and protrusions can form a uniform and flat support surface for the screen 400. When the screen 400 is impacted, the impact force can be evenly transmitted to the hinge assembly 100, avoiding excessive pressure at local positions on the support surface formed by the rotating parts and protrusions, which could puncture or damage the screen 400.

[0131] Figure 17 yes Figure 8 A partial schematic diagram of the hinge assembly 100.

[0132] like Figure 17As shown, in one embodiment provided in this application, when the first swing arm 20 and the second swing arm 30 are in a flattened state, the step difference between the surface of the first rotating part 21 and the first protrusion 41 facing the screen 400 and the surface of the upper base 11 with the first notch 111 is 0-1mm, and the step difference between the surface of the second rotating part 31 and the second protrusion 42 facing the screen 400 and the surface of the upper base 11 with the second notch 112 is 0-1mm.

[0133] The surfaces of the first rotating part 21, the first protrusion 41, the second rotating part 31, and the second protrusion 42 facing the screen 400 can be understood as follows: Figure 17 The surface filled with the vertical dashed line in the middle, and the surface of the upper base 11 with the first notch 111 and the second notch 112 can be understood as... Figure 17 The horizontal dashed lines fill the surfaces, and the step difference between these two sets of surfaces is between 0 and 1 mm. When the step difference between these two sets of surfaces is 0, they are on the same plane, forming a uniform and flat support surface for the screen 400, thus preventing excessive local pressure on the support surface from puncturing or damaging the screen 400. When the step difference between the two sets of surfaces is less than or equal to 1 mm and not equal to 0, these two sets of surfaces can also provide good support for the screen 400.

[0134] Return Figure 4 As shown, the hinge assembly in the related technology, besides having the design flaw of "the outer surfaces of both the portion of the swing arm 05 with the spiral groove 04 and the protrusion 03 being curved surfaces," also has a notch 06 on the portion of the swing arm 05 with the spiral groove 04. This notch 06 is designed to prevent interference between the portion of the swing arm 05 with the synchronous slider 07 when the swing arm 05 rotates to the folded state. However, the presence of this notch 06 further increases the number of gaps in the hinge assembly, resulting in more unsupported portions of the screen 400, thus failing to provide adequate support for the screen 400.

[0135] Therefore, in order to solve the above problems, such as Figure 14 As shown, in one embodiment provided in this application, a first clearance groove 44 is provided on the synchronous slider 40 near the first protrusion 41, and a second clearance groove 45 is provided on the synchronous slider 40 near the second protrusion 42. When the first swing arm 20 and the second swing arm 30 are in a folded state, a portion of the first component 211 extends into the first clearance groove 44, and a portion of the third component 311 extends into the second clearance groove 45.

[0136] In this embodiment, by designing a first clearance groove 44 and a second clearance groove 45 on the synchronous slider 40, the synchronous slider 40 can avoid the first component 211 and the third component 311 when the first swing arm 20 and the second swing arm 30 rotate to the folded state. Compared with related technologies, when solving the same interference problem, this embodiment does not require openings in the first component 211 and the third component 311, thereby ensuring the integrity of the body of the first component 211 and the third component 311. When the first swing arm 20 and the second swing arm 30 are in the flattened state, the number of gaps in the hinge assembly 100 is reduced, which reduces the part of the screen 400 that is in a suspended state, thereby forming a better support effect for the screen 400 and improving the impact resistance of the screen 400.

[0137] The working process of the above embodiments will be further described below with reference to the accompanying drawings.

[0138] Figure 18 This is a cross-sectional view of the hinge assembly 100 provided in the embodiments of this application in the flattened state, as shown below. Figure 18 As shown, the first component 211 and the third component 311 are intact, and the gaps between the first component 211 and the third component 311 and the upper base 11 are very small, thus providing good support for the screen 400.

[0139] Figure 19 This is a cross-sectional view of the hinge assembly 100 provided in this application embodiment during the folding process, as shown below. Figure 19 As shown, the first swing arm 20 and the second swing arm 30 begin to fold. The first swing arm 20 and the second swing arm 30 rotate synchronously under the action of the synchronous slider 40, which in turn drives the first component 211 and the third component 311 to rotate around the first connecting shaft 13 and the second connecting shaft 14, respectively.

[0140] Figure 20 This is a cross-sectional view of the hinge assembly 100 provided in the embodiment of this application in the folded state, as shown below. Figure 20 As shown, since the first clearance groove 44 and the second clearance groove 45 are designed on the synchronous slider 40, when the first swing arm 20 and the second swing arm 30 are in the folded state, the ends of the first component 211 and the third component 311 can extend into the first clearance groove 44 and the second clearance groove 45 to avoid interference with the synchronous slider 40.

[0141] For example Figure 20As shown, in one embodiment provided in this application, the first clearance groove 44 and the second clearance groove 45 are not blindly opened, but are made to meet the following conditions by controlling the groove depth of the first clearance groove 44 and the second clearance groove 45: when the first swing arm 20 and the second swing arm 30 are in the folded state, the first component 211 abuts against the groove wall of the first clearance groove 44, and the third component 311 abuts against the groove wall of the second clearance groove 45.

[0142] This design allows the synchronous slider 40 to have a "three-in-one" effect: firstly, it performs its basic function, enabling the first swing arm 20 and the second swing arm 30 to rotate synchronously; secondly, it can act as a stop, controlling the folding angle of the first swing arm 20 and the second swing arm 30 to prevent them from over-folding; and thirdly, it can improve the impact resistance of the hinge assembly 100. This is because the phone casing is fixedly connected to the door panel 51 or the connecting block 53. When the phone falls, the phone casing will transmit the impact force from the connecting block 53 to the first swing arm 20, the second swing arm 30, and the main swing arm 54. The first swing arm 20, the second swing arm 30, and the main swing arm 54 will then transmit the impact force to the base 10. The base 10 has fewer stress points and higher pressure, making it prone to damage. In this embodiment, since the first swing arm 20 and the second swing arm 30 can also abut against the synchronous slider 40, the impact force on the first swing arm 20 and the second swing arm 30 can also be transmitted to the base 10 through the synchronous slider 40, thereby adding a force point and thus avoiding excessive pressure on local parts of the base 10 and damage.

[0143] As mentioned above, the first component 211 and the third component 311 mainly support the screen 400. The first clearance groove 44 and the second clearance groove 45 designed on the synchronous slider 40 are designed to avoid the first component 211 and the second component 212 when the first swing arm 20 and the second swing arm 30 rotate to the folded state. The thickness and shape of the first component 211 and the second component 212 will affect the structural strength of the first component 211 and the second component 212, which in turn will affect the support effect on the screen 400. Generally speaking, the greater the thickness of the first component 211 and the second component 212, the greater the structural strength, and thus the better the support effect on the screen 400. Due to the limited space on the base 10, the size of the synchronous slider 40 cannot be increased without restriction. After the first clearance groove 44 and the second clearance groove 45 are opened, the thickness and structural strength of the synchronous slider 40 will inevitably be reduced. In particular, when the thickness of the first component 211 and the second component 212 increases, the size of the first clearance groove 44 and the second clearance groove 45 must also be increased accordingly in order to allow the first component 211 and the second component 212 to make way, thereby further reducing the thickness and structural strength of the synchronous slider 40.

[0144] It is evident that there is a contradiction between the supporting effect of the first component 211 and the second component 212 on the screen 400 and the structural strength of the synchronous slider 40. To balance this contradiction, the following embodiments define the structures of the first clearance groove 44, the second clearance groove 45, the first component 211, and the third component 311, as detailed below.

[0145] Figure 21 yes Figure 18 Enlarged view of point A in the middle. Figure 22 yes Figure 20 Enlarged view of point B in the middle.

[0146] like Figures 21-22 As shown, in one embodiment provided in this application, the first clearance groove 44 has a wedge-shaped cross-section. The first component 211 includes a first plane 211b and a second plane 211c inclined relative to the first plane 211b. When the first swing arm 20 is in the flattened state, the first plane 211b faces the screen 400. When the first swing arm 20 is in the folded state, the second plane 211c abuts against the groove wall of the first clearance groove 44. The second clearance groove 45 has a wedge-shaped cross-section. The third component 311 includes a third plane and a fourth plane inclined relative to the third plane. When the second swing arm 30 is in the flattened state, the third plane faces the screen 400. When the second swing arm 30 is in the folded state, the fourth plane abuts against the groove wall of the first clearance groove 44.

[0147] In this embodiment, by defining the structures of the first clearance groove 44, the second clearance groove 45, the first component 211, and the third component 311 as described above, the structural strength of the synchronous slider 40 can be ensured while ensuring that the first component 211 and the third component 311 provide good support for the screen 400. The specific reason is as follows: taking the first component 211 and the first clearance groove 44 as an example... Figure 21 As shown, the first component 211 includes a first plane 211b and a second plane 211c inclined relative to the first plane 211b. This design makes the second plane 211c similar to a bracing structure in the field of architecture, enabling the first component 211 to have high supporting strength without making the body of the first component 211 too thick. Therefore, the first clearance groove 44 does not need to be too large, and its general outline is similar to that of the first component 211 to meet the clearance requirements, thereby ensuring the body thickness and structural strength of the synchronous slider 40 at the first clearance groove 44. Correspondingly, the technical principles of the third component 311 and the second clearance groove 45 are similar and will not be described in detail here.

[0148] In addition, for example Figure 22As shown, when the first swing arm 20 is in the folded state, the second plane 211c of the first component 211 abuts against the groove wall of the wedge-shaped first clearance groove 44. This allows for effective surface contact between the first component 211 and the synchronous slider 40, enabling the first component 211 to evenly transmit the impact force to the synchronous slider 40, thus avoiding excessive local pressure that could damage the first component 211 or the synchronous slider 40, thereby ensuring the impact resistance of the hinge assembly 100. Correspondingly, the technical principles of the third component 311 and the second clearance groove 45 are similar and will not be described in detail here.

[0149] For example Figure 21 As shown, in one embodiment provided in this application, the first plane 211b and the second plane 211c are connected by a chamfer. The third plane and the fourth plane are connected by a chamfer.

[0150] In this embodiment, the first plane 211b and the second plane 211c of the first component 211 are connected by a chamfer, thereby preventing the end of the first component 211 from having a sharp "blade" structure, and thus preventing the first component 211 from cutting or piercing the screen 400. Furthermore, when the first swing arm 20 rotates around the first connecting shaft 13, the first component 211 also rotates around the first connecting shaft 13. The rotation trajectory of the end of the first component 211 is an arc. To avoid the end of the first component 211, the upper base 11 also needs to have an arc-shaped clearance groove. A chamfer is provided at the junction of the first plane 211b and the second plane 211c, thereby preventing the end of the first component 211 from excessively intruding into the clearance groove. This eliminates the need for an excessively large clearance groove on the upper base 11, ensuring the thickness and strength of the upper base 11. Correspondingly, the technical principle of the third component 311 is similar and will not be described in detail here.

[0151] Alternatively, the chamfer can be an angled chamfer or a rounded chamfer. A rounded chamfer is preferred, as it better fits the arc-shaped clearance groove of the upper base 11, and compared to an angled chamfer, a rounded chamfer can retain more of the body substrate to ensure the strength of the first member 211 and the third member 311.

[0152] As previously described, the first protrusion 41 has two fifth helical surfaces 411 arranged opposite to each other along a first direction, so that the first protrusion 41 is similar in shape to the first helical groove 22. The second protrusion 42 has two sixth helical surfaces 421 arranged opposite to each other along a first direction, so that the second protrusion 42 is similar in shape to the second helical groove 32. In another embodiment provided in this application, the first protrusion 41 and the second protrusion 42 may also be hemispherical, cylindrical, or other structures, and the first protrusion 41 and the second protrusion 42 are slidably connected in the first helical groove 22 and the second helical groove 32, respectively.

[0153] For example Figure 14 Figure 15 As shown, in one embodiment of this application, a groove 43 is provided on the side of the synchronization slider 40 facing away from the screen 400, and the groove 43 extends through the synchronization slider 40 along a first direction. Since the synchronization slider 40 needs to slide relative to the base 10 along the first direction, in this embodiment, a groove 43 extending along the first direction is provided at the bottom of the synchronization slider 40. When the synchronization slider 40 slides, the groove 43 can avoid other components on the base 10, or it can also form a sliding engagement with the slider on the base 10 through the groove 43 to guide the synchronization slider 40.

[0154] For example Figure 10 As shown, in one embodiment provided by this application, the base 10 is provided with a first connecting shaft 13 and a second connecting shaft 14, the first rotating part 21 is provided with a shaft hole for rotatably connecting with the first connecting shaft 13, and the second rotating part 31 is provided with a shaft hole for rotatably connecting with the second connecting shaft 14. In this embodiment, a specific design for the rotatable connection between the first swing arm 20 and the second swing arm 30 and the base 10 is given, which has the advantages of simple structure and good stability.

[0155] For example Figure 10 As shown, in one embodiment provided by this application, the first protrusion 41 is provided with a through hole that is slidably connected to the first connecting shaft 13, and the second protrusion 42 is provided with a through hole that is slidably connected to the second connecting shaft 14. This embodiment provides a specific design for the sliding connection between the synchronous slider 40 and the base 10, which has the advantage of a compact structure.

[0156] Finally, it should be noted that the above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A hinge assembly, characterized in that, include: Base (10); The first swing arm (20) has a first rotating part (21), the first rotating part (21) is rotatably connected to the base (10) and is provided with a first spiral groove (22) extending spirally along a first direction; the first direction is the axial direction of the hinge assembly; The second swing arm (30) has a second rotating part (31), the second rotating part (31) is rotatably connected to the base (10) and is provided with a second spiral groove (32) that extends spirally along the first direction; The synchronous slider (40) can slide relative to the base (10) along the first direction. The synchronous slider (40) has a first protrusion (41) slidably connected in the first spiral groove (22) and a second protrusion (42) slidably connected in the second spiral groove (32). Under the action of the synchronous slider (40), the first swing arm (20) and the second swing arm (30) can rotate synchronously and switch between folded and flattened states. When the first swing arm (20) and the second swing arm (30) are in a flattened state, the surfaces of the first rotating part (21) and the second rotating part (31) facing the screen (400) are planar structures; and / or, the surfaces of the first protrusion (41) and the second protrusion (42) facing the screen (400) are planar structures.

2. The hinge assembly according to claim 1, characterized in that, When the first swing arm (20) and the second swing arm (30) are in a flattened state, the first rotating part (21), the second rotating part (31), the first protrusion (41) and the second protrusion (42) are coplanar with the surfaces facing the screen (400).

3. The hinge assembly according to claim 1 or 2, characterized in that, The synchronous slider (40) has a first clearance groove (44) near the first protrusion (41), and the synchronous slider (40) has a second clearance groove (45) near the second protrusion (42); The first rotating part (21) includes a first component (211) and a second component (212), wherein the first component (211) and the second component (212) are respectively provided with a first spiral surface (211a) and a second spiral surface (212a) for enclosing and forming the first spiral groove (22); The second rotating part (31) includes a third component (311) and a fourth component (312), wherein the third component (311) and the fourth component (312) are respectively provided with a third helical surface (311a) and a fourth helical surface (312a) for enclosing and forming the second helical groove (32); When the first swing arm (20) and the second swing arm (30) are in a folded state, part of the first component (211) extends into the first clearance groove (44), and part of the third component (311) extends into the second clearance groove (45).

4. The hinge assembly according to claim 3, characterized in that, When the first swing arm (20) and the second swing arm (30) are in a folded state, the first component (211) abuts against the wall of the first clearance groove (44), and the third component (311) abuts against the wall of the second clearance groove (45).

5. The hinge assembly according to claim 4, characterized in that, The first clearance groove (44) has a wedge-shaped cross section. The first component (211) includes a first plane (211b) and a second plane (211c) that is inclined relative to the first plane (211b). When the first swing arm (20) is in a flattened state, the first plane (211b) faces the screen (400). When the first swing arm (20) is in a folded state, the second plane (211c) abuts against the groove wall of the first clearance groove (44). The second clearance groove (45) has a wedge-shaped cross section. The third component (311) includes a third plane and a fourth plane that is inclined relative to the third plane. When the second swing arm (30) is in a flattened state, the third plane faces the screen (400). When the second swing arm (30) is in a folded state, the fourth plane abuts against the groove wall of the second clearance groove (45).

6. The hinge assembly according to claim 5, characterized in that, The first plane (211b) and the second plane (211c) are connected by a chamfer; The third plane and the fourth plane are connected by a chamfer.

7. The hinge assembly according to any one of claims 3-6, characterized in that, The first protrusion (41) has two fifth helical surfaces (411) arranged opposite to each other along the first direction, and the two fifth helical surfaces (411) respectively cooperate with the first helical surface (211a) and the second helical surface (212a); The second protrusion (42) has two sixth helical surfaces (421) arranged opposite to each other along the first direction. The two sixth helical surfaces (421) respectively cooperate with the groove walls of the third helical surface (311a) and the fourth helical surface (312a).

8. The hinge assembly according to any one of claims 3-7, characterized in that, The first swing arm (20) includes a first sub-swing arm (23) and a second sub-swing arm (24) spliced ​​together. The first component (211) is disposed on the first sub-swing arm (23), and the second component (212) is disposed on the second sub-swing arm (24). The first component (211) and the second component (212) are spliced ​​together to form the first rotating part (21). The second swing arm (30) includes a third sub-swing arm (33) and a fourth sub-swing arm (34) spliced ​​together. The third component (311) is disposed on the third sub-swing arm (33), and the fourth component (312) is disposed on the fourth sub-swing arm (34). The third component (311) and the fourth component (312) are spliced ​​together to form the second rotating part (31).

9. The hinge assembly according to claim 8, characterized in that, One of the first sub-swing arm (23) and the second sub-swing arm (24) is provided with a first positioning pin (231), and the other is provided with a first positioning hole (241); One of the third sub-swing arm (33) and the fourth sub-swing arm (34) is provided with a second positioning pin (331), and the other is provided with a second positioning hole (341).

10. The hinge assembly according to any one of claims 1-9, characterized in that, When the first swing arm (20) and the second swing arm (30) are in a flattened state, the opposing surfaces of the first rotating part (21) and the second rotating part (31) are planar structures.

11. The hinge assembly according to any one of claims 1-10, characterized in that, The surfaces of the first protrusion (41) and the second protrusion (42) facing away from the screen (400) are planar structures, and the surfaces of the first protrusion (41) and the second protrusion (42) facing away from each other are planar structures.

12. The hinge assembly according to claim 2, characterized in that, The base (10) includes an upper base (11) for supporting the screen (400), the upper base (11) having a first notch (111) and a second notch (112); When the first swing arm (20) and the second swing arm (30) are in a flattened state, the step difference between the surface of the first rotating part (21) and the first protrusion (41) facing the screen (400) and the surface of the upper base (11) with the first notch (111) is 0 to 1 mm, and the step difference between the surface of the second rotating part (31) and the second protrusion (42) facing the screen (400) and the surface of the upper base (11) with the second notch (112) is 0 to 1 mm.

13. The hinge assembly according to any one of claims 1-12, characterized in that, The synchronization slider (40) has a groove (43) on the side facing away from the screen (400), and the groove (43) passes through the synchronization slider (40) along the first direction.

14. The hinge assembly according to any one of claims 1-13, characterized in that, The base (10) is provided with a first connecting shaft (13) and a second connecting shaft (14). The first rotating part (21) is provided with a shaft hole that is rotatably connected to the first connecting shaft (13), and the second rotating part (31) is provided with a shaft hole that is rotatably connected to the second connecting shaft (14).

15. The hinge assembly according to claim 14, characterized in that, The first protrusion (41) is provided with a through hole that is slidably connected to the first connecting shaft (13), and the second protrusion (42) is provided with a through hole that is slidably connected to the second connecting shaft (14).

16. An electronic device, characterized in that, Includes the hinge assembly (100) as described in any one of claims 1-15.

17. The electronic device according to claim 16, characterized in that, It also includes a first housing (200), a second housing (300), and a screen (400), wherein the hinge assembly (100) is connected between the first housing (200) and the second housing (300), and the screen (400) is disposed on one side of the first housing (200), the hinge assembly (100), and the second housing (300).

18. The electronic device according to claim 17, characterized in that, When the first swing arm (20) and the second swing arm (30) are in a folded state, the screen (400) is located inside the first housing (200) and the second housing (300).

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