Hinge device, folding device and foldable electronic equipment

Abstract

The invention provides a hinge device, a folding device and foldable electronic equipment, the hinge device comprises a base, a first rotating shaft assembly and a second rotating shaft assembly, a compensation mechanism of each rotating shaft assembly comprises a first connecting rod, a second connecting rod and a third connecting rod, and concentric parts of the connecting rods are rotationally connected with one another; the concentric part of each connecting rod rotates around a third axis relative to the base, and the rotating part of the second connecting rod is driven by the main swing arm to rotate around the first axis relative to the base and drives the concentric part of each connecting rod to rotate around the third axis relative to the base. And the movable plate and the third connecting rod relatively rotate around a fourth axis. When the main swing arm rotates relative to the base, the movable plate slides relative to the main swing arm so as to generate displacement in the direction close to or away from the base. According to the hinge device provided by the embodiment of the invention, the length of the folding device can be adjusted in the foldable electronic equipment, and the display screen is prevented from being extruded or stretched in the folding and unfolding process.

Description

Technical Field

[0001] The present application relates to the field of electronic devices, and in particular to a hinge device, a folding device and a foldable electronic device. Background Art

[0002] With the development of flexible display screens, foldability has become an important direction for the development of electronic devices. A foldable electronic device includes two parts that can rotate relative to each other, and the two parts are rotatably connected by a hinge device to achieve the folding and unfolding of the foldable electronic device to meet different usage scenarios. The foldable electronic device as a whole is composed of a folding device (also called a shell assembly, and the hinge device is arranged in the folding device) and a display screen, and the display screen is laid on one side of the folding device. When the foldable electronic device is folded and unfolded, the display screen folds and unfolds with the folding device. However, since the folding device and the display screen are stacked and both have a certain thickness, there is a path difference between the display screen and the folding device during the folding and unfolding process.

[0003] Foldable electronic devices are divided into inward-folding electronic devices and outward-folding fixed electronic devices. Inward-folding electronic devices refer to foldable electronic devices in which the folding device surrounds the display screen in the folded state, while outward-folding electronic devices refer to foldable electronic devices in which the display screen surrounds the folding device in the folded state. Taking the inward-folding electronic device as an example, when the display screen and the folding device are not fixed, it is assumed that when the inward-folding electronic device is in the unfolded state, the display screen and the folding device are aligned, and the lengths of the two are the same. At this time, if the inward-folding electronic device is switched to the folded state, the display screen and the folding device are misaligned, and both ends protrude from the folding device. If it is to be ensured that both ends of the display screen and the folding device of the inward-folding electronic device are aligned in the folded state, the folding device located on the outside is longer than the display screen on the inside. This means that the length of the folding device needs to be adjusted during the unfolding and folding process of the foldable electronic device to adapt to the different forms of the display screen. In actual products, the two ends of the display screen are often fixed on the folding device. If the length of the folding device cannot be adjusted during the folding and unfolding process, the display screen will be squeezed or stretched, thereby damaging the display screen.

[0004] Existing foldable electronic devices cannot adjust the length of the folding device. For example, in one prior art, a hinge cover and a first rotating arm and a second rotating arm rotatably connected to both sides of the hinge cover are provided in the hinge device, the first rotating arm is fixed to the first shell, and the second rotating arm is fixed to the second shell. The first rotating arm and the second rotating arm are relatively rotated by a pair of mutually meshing gear sets, so that the first shell and the second shell can be relatively rotated. The two ends of the display screen are respectively fixed to the first shell and the second shell, so that it can be unfolded and folded together with the first shell and the second shell. This structure cannot adjust the length of the folding device. Since the display screen is respectively fixed to the first shell and the second shell, the display screen of the foldable electronic device is squeezed in the folded state, facing the risk of damage.

[0005] It can be seen that the foldable electronic devices in the prior art cannot adjust the length of the folding device, which causes the display screen to be squeezed or stretched during the folding and unfolding process, facing the risk of damage. Summary of the invention

[0006] The hinge device, folding device and foldable electronic device provided in the embodiments of the present application solve the problem in the prior art that the foldable electronic device cannot adjust the length of the folding device, causing the display screen to be squeezed or stretched during the folding and unfolding process, facing the risk of damage.

[0007] An embodiment of the present application provides a hinge device for a foldable electronic device, including a base, a first rotating shaft assembly and a second rotating shaft assembly. The first rotating shaft assembly and the second rotating shaft assembly are respectively arranged on both sides of the base in a first direction and are rotatably connected to the base. Each rotating shaft assembly in the first rotating shaft assembly and the second rotating shaft assembly includes a main swing arm, a movable plate and a compensation mechanism.

[0008] The base is provided with a main shaft, and the main swing arm is rotatably connected to the base through the main shaft, so that the main swing arm rotates relative to the base around a first axis; wherein the first axis extends along a second direction, the second direction is the extension direction of the main shaft, and the second direction is perpendicular to the first direction. The movable plate is rotatably connected to the base through the main swing arm, the rotation axis is the first axis, and the movable plate is slidably connected to the main swing arm.

[0009] The compensation mechanism includes a first connecting rod, a second connecting rod and a third connecting rod. Each of the first connecting rod, the second connecting rod and the third connecting rod includes a concentric portion and a rotating portion arranged at intervals. The concentric portions of each connecting rod are rotatably connected to each other, and the rotation axis between any two connecting rods is the second axis.

[0010] The first connecting rod is rotatably connected to the base through the rotating part of the first connecting rod, so that the concentric parts of each connecting rod rotate relative to the base around the third axis. The second connecting rod is rotatably connected to the base through the rotating part of the second connecting rod, and the rotating part of the second connecting rod is installed on the main shaft or the main swing arm, so that it rotates relative to the base around the first axis under the drive of the main swing arm, and drives the concentric parts of each connecting rod to rotate relative to the base around the third axis; the third connecting rod is rotatably connected to the movable plate through the rotating part of the third connecting rod, and the rotation axis between the movable plate and the third connecting rod is the fourth axis; wherein the second axis, the third axis and the fourth axis all extend along the second direction.

[0011] When the main swing arm rotates relative to the base, the movable plate slides relative to the main swing arm under the drive of the main swing arm and the compensation mechanism to generate displacement in a direction close to or away from the base. The movable plate of the first rotating shaft assembly is fixedly connected to the first shell of the foldable electronic device, and the movable plate of the second rotating shaft assembly is fixedly connected to the second shell of the foldable electronic device.

[0012] The hinge device provided in the embodiment of the present application is used to realize the unfolding and folding of a foldable electronic device. The first shell of the foldable electronic device is installed on the movable plate of the first rotating shaft assembly, and the second shell is installed on the movable plate of the second rotating shaft assembly. During the folding process of the foldable electronic device, the main swing arms of the first rotating shaft assembly and the second rotating shaft assembly rotate relative to the base respectively, so that the main swing arms of each rotating shaft assembly rotate relatively, thereby driving the movable plates of each rotating shaft assembly to rotate relatively, so that the first shell and the second shell of the foldable electronic device rotate relatively.

[0013] The movable plate is slidably connected to the main swing arm, and a compensation mechanism is provided in each rotating shaft assembly. The compensation mechanism includes a first connecting rod, a second connecting rod and a third connecting rod, and the concentric parts of the three connecting rods are concentrically connected, and the second axis is a concentric axis. When the foldable electronic device is folded and unfolded, the movement trajectory of the second axis is jointly controlled by the rotation of the first connecting rod relative to the base and the eccentric movement of the rotating part of the second connecting rod, so that the second axis rotates relative to the base and drives the movement of the rotating part of the third connecting rod to drive the movable plate to slide relative to the main swing arm. Driven by the main swing arm and the compensation mechanism, the movable plate slides relative to the main swing arm, and is displaced in the direction of approaching or moving away from the base, thereby changing the distance between the movable plate and the base.

[0014] Furthermore, the first shell and the second shell of the foldable electronic device are also displaced toward or away from the base under the drive of each movable plate, and the overall length of the folding device composed of the first shell, the second shell and the hinge device can be adjusted to adapt to different forms of the display screen. In an inward-folding electronic device, when the foldable electronic device is in an unfolded state, the movable plates of each rotating shaft assembly are closer to the base, and the overall length of the folding device is shorter. When the foldable electronic device is in a folded state, the movable plates of each rotating shaft assembly are farther from the base, and the overall length of the folding device is longer, so it can adapt to the length of the display screen and prevent the display screen from being stretched or squeezed.

[0015] It can be seen that the hinge device provided in the present application can adjust the length of the folding device in a foldable electronic device, thereby preventing the display screen from being squeezed or stretched during the folding and unfolding process, thereby preventing the display screen from being damaged.

[0016] Furthermore, the three connecting rods in the compensation mechanism rotate together around the second axis, that is, they share a common concentric axis, the structure is stable and the assembly error is small, and the motion trajectory of each connecting rod is highly accurate. In addition, the overall structure of the compensation mechanism is relatively compact, occupies a small space, and can be set below the display screen (that is, set in the installation space between the display screen and the base, without the need to set the compensation mechanism on both sides of the base in the length direction of the base to avoid the display screen), which is conducive to the narrow frame design of the foldable electronic device and maximizes the display screen.

[0017] In some embodiments, each rotating shaft assembly further includes an eccentric shaft, and the rotating portion of the second connecting rod is mounted on the main shaft through the eccentric shaft and is rotationally connected to the main shaft. The eccentric shaft is inserted into the main shaft, and the rotating portion of the second connecting rod is configured as a sleeve structure and sleeved on the outer periphery of the eccentric shaft. When the rotating portion of the second connecting rod rotates relative to the base around the first axis under the drive of the main swing arm, the second connecting rod rotates relative to the main shaft around a fifth axis, and the fifth axis is the axis center of the eccentric shaft and is parallel to the first axis.

[0018] By adopting the above solution, the second connecting rod is connected to the main shaft through the solid shaft, the connection strength between the eccentric shaft and the main shaft is high, the stability is strong, and the motion trajectory of the rotating part of the second connecting rod is high in accuracy.

[0019] In some embodiments, the main shaft is provided with an axial hole, the axial hole and the axis of the main shaft are spaced apart in the radial direction of the main shaft, and the eccentric shaft is inserted into the axial hole. The axial hole is provided on the outer wall surface of the main shaft, and a notch is formed on the outer wall surface of the main shaft, and a part of the structure of the eccentric shaft is embedded in the main shaft along the radial direction of the main shaft. The notch is provided on the outer wall surface of the main shaft to facilitate the installation of the eccentric shaft on the main shaft.

[0020] In some embodiments, in each rotating shaft assembly, the third axis is located on a side of the first axis close to another rotating shaft assembly in the first direction.

[0021] By adopting the above solution, the third axes of the first rotating shaft assembly and the second rotating shaft assembly can overlap and be shared, thus saving space.

[0022] In some embodiments, in each rotating shaft assembly, the concentric portion of the first connecting rod includes a first connecting portion, the concentric portion of the second connecting rod includes two second connecting portions spaced apart in the second direction, and the concentric portion of the third connecting rod includes two third connecting portions spaced apart in the second direction;

[0023] Along the second direction, the two third connecting portions of the third connecting rod are arranged between the two second connecting portions of the second connecting rod, and the first connecting portion of the first connecting rod is arranged between the two third connecting portions of the third connecting rod.

[0024] The compensation mechanism also includes a coaxial shaft. Each of the first connecting part, the two second connecting parts, and the two third connecting parts is configured as a sleeve structure, and each connecting part is centrally arranged in the second direction. The coaxial shaft passes through each connecting part, so that any two connecting rods can rotate relative to each other around the second axis.

[0025] By adopting the above scheme, the connecting rods are connected through coaxial shafts, the structure is stable, the assembly error is small, and the motion trajectory of the connecting rod is highly accurate.

[0026] In some embodiments, the rotating part of the first connecting rod is connected to the first connecting part through a first connecting plate, the rotating part of the second connecting rod is connected to the two second connecting parts through a second connecting plate, and the rotating part of the third connecting rod is connected to the two third connecting parts through a third connecting plate. The first connecting plate, the second connecting plate and the third connecting plate are all configured as plate-shaped structures.

[0027] By adopting the above scheme, the plate-like structure is relatively stable, not easy to deform, and has high reliability. In addition, the connecting rod of the plate-like structure can be processed into a bent shape according to the shape and position of each component in the actual product, avoiding other structural parts, such as avoiding the appearance parts on the base, reducing the openings on the appearance parts, and making the product have a complete appearance.

[0028] In some embodiments, the rotating portion, the first connecting portion and the first connecting plate of the first connecting rod are arranged as an integrated structure. The rotating portion, the two second connecting portions and the second connecting plate of the second connecting rod are arranged as an integrated structure; the rotating portion, the two third connecting portions and the third connecting plate of the third connecting rod are arranged as an integrated structure.

[0029] Each connecting rod is an integrally formed structure, which is more solid and simplifies the production and installation process.

[0030] In some embodiments, the main swing arm includes a main body and two connecting arms connected to the main body, the two connecting arms are fixedly connected to the main shaft, and the main shaft rotates relative to the base around the first axis under the drive of the main swing arm, so that the main swing arm rotates relative to the base around the first axis. The movable plate includes a main body and a rotating connecting member connected to the main body, the rotating connecting member is rotatably connected to the rotating part of the third connecting rod, so that the third connecting rod is rotatably connected to the movable plate.

[0031] The main body of the main swing arm is stacked with the main body of the movable plate and is slidably connected via at least one sliding structure; each sliding structure in the at least one sliding structure includes a sliding rail and a sliding block that are slidably connected to each other, one of the sliding rail and the sliding block is arranged on the main body of the movable plate, and the other is arranged on the main body of the main swing arm.

[0032] With the above solution, the main swing arm and the movable plate are connected via a sliding structure to achieve relative sliding between the two.

[0033] In some embodiments, the main shaft includes a first shaft body and a second shaft body spaced apart in a second direction, and each of the two connecting arms of the main swing arm is configured as a sleeve structure, one of the two connecting arms is sleeved and fixed on the first shaft body, and the other is sleeved and fixed on the second shaft body, and when each rotating shaft assembly rotates relative to the base, the first shaft body and the second shaft body of the main shaft rotate synchronously.

[0034] A first hollow portion is provided on the main body of the main swing arm. The first hollow portion is located between the two connecting arms in the second direction and is connected to the space between the two connecting arms. An accommodating space is formed between the two connecting arms and the main body, and the compensation mechanism is located as a whole in the accommodating space.

[0035] By adopting the above scheme, the main shaft is broken into two parts, and the first hollow part is set on the main swing arm to avoid the structure of the compensation mechanism. The compensation mechanism is accommodated in the cavity between the main shaft and the main swing arm, making the overall structure of the hinge device more compact and saving space.

[0036] In some possible embodiments, the rotating connection member of the movable plate includes two rotating arms spaced apart along the second direction, and the rotating portion of the third connecting rod is disposed between the two rotating arms.

[0037] The rotating part of the third connecting rod and the two connecting arms of the movable plate are both configured as sleeve structures and are centrally arranged along the second direction. The compensation mechanism also includes a rotating connecting shaft, which passes through the rotating part of the third connecting rod and the two connecting arms of the movable plate, so that the third connecting rod is rotatably connected to the movable plate.

[0038] In some embodiments, the main body of the main swing arm is slidably connected to the main body of the movable plate through two sliding structures. The main body of the movable plate is provided with a first protrusion, a second protrusion and a third protrusion which are sequentially arranged in intervals along the second direction, and each of the first protrusion, the second protrusion and the third protrusion protrudes out of the main body toward a side close to the main swing arm. The main body of the main swing arm is located as a whole between the first protrusion and the third protrusion in the second direction, and a groove corresponding to the second protrusion is provided on the main body, and the second protrusion is embedded in the groove and slides in the groove.

[0039] Along the second direction, a slide rail is formed between the first protrusion and the second protrusion, and a slide rail is formed between the second protrusion and the third protrusion. The parts of the main body of the main swing arm located on both sides of the groove respectively constitute a slider, and each slider corresponds to each slide rail. The main body itself is designed as a slider, the structure is simple, and the area of ​​the main swing arm and the movable plate in sliding connection is large.

[0040] In some embodiments, each hinge assembly further includes a support plate, which is used to support the display screen of the foldable electronic device and is stacked on a side of the movable plate away from the main swing arm.

[0041] The support plate is slidably connected to the movable plate and the main swing arm respectively. When the main swing arm rotates relative to the base around the first axis, the support plate slides relative to the main swing arm driven by the movable plate, and slides relative to the movable plate along an arc trajectory. The support plate rotates relative to the movable plate around the sixth axis, and the sixth axis extends along the second direction.

[0042] With the above solution, during the rotation of the main swing arm, the support plate not only slides relative to the main swing arm along with the movable plate, but also rotates relative to the movable plate, so that the support plate and the movable plate present different angles to support the display screen in different states.

[0043] In some embodiments, the support plate includes a plate body, a first boss, and two second bosses located on both sides of the first boss in the second direction. Each of the first boss and the two second bosses is connected to the plate body and protrudes from the plate body toward the side close to the main swing arm.

[0044] The main swing arm includes a connection platform protruding from the main body toward a side close to the support plate, and a second hollow portion is provided on the main body of the movable plate. The connection platform of the main swing arm and the first boss of the support plate are both accommodated in the second hollow portion of the movable plate and are slidably connected to each other, so that the support plate and the movable plate are slidably connected. The movable plate is stacked between the main swing arm and the support plate, and in order to avoid the connection piece between the main swing arm and the support plate, the corresponding position on the movable plate is hollowed out for avoidance.

[0045] The movable plate is located as a whole between the two second bosses of the support plate in the second direction. Arc slide rails are arranged at both ends of the movable plate. Each of the two second bosses is arranged into an arc structure and slides in the corresponding arc slide rail. The support plate slides relative to the movable plate along the arc track.

[0046] In some embodiments, an arc-shaped hole is provided on the first boss of the support plate, the arc-shaped hole passes through the first boss along the second direction, and extends along an arc line in a plane perpendicular to the second direction. The connecting platform of the main swing arm includes two connecting brackets spaced apart in the second direction, and the first boss is located between the two connecting brackets.

[0047] The connecting platform of the main swing arm also includes a sliding rod, the two ends of which are installed on two connecting brackets, and the sliding rod is inserted into the arc hole of the first boss. The sliding rod slides in the arc hole, so that the support plate slides along an arc track relative to the main swing arm.

[0048] In some embodiments, the hinge device also includes a fixed bracket arranged on the base, and the rotating part of the first connecting rod in each rotating shaft assembly is rotatably connected to the fixed bracket, so that the first connecting rod of each rotating shaft assembly is rotatably connected to the base, and the third axes of each rotating shaft assembly coincide.

[0049] With the above solution, the first rotating shaft assembly and the second rotating shaft assembly share a third axis. This design is relatively compact and reduces the space occupied by the hinge device in the first direction.

[0050] In some embodiments, the fixed bracket includes a first bracket and a second bracket arranged at intervals in the second direction, the rotating portion of the first connecting rod in each rotating shaft assembly is arranged between the first bracket and the second bracket, and the rotating portion of the first connecting rod in the first rotating shaft assembly is rotatably connected to the first bracket, and the rotating portion of the second connecting rod in the second rotating shaft assembly is rotatably connected to the second bracket.

[0051] The hinge device also includes a fixed shaft. The first bracket, the second bracket, and the rotating part of the first connecting rod in each rotating shaft assembly are all configured as a sleeve structure and are centrally arranged in the second direction. The fixed shaft is sequentially passed through the first bracket, the rotating part of the first connecting rod in the first rotating shaft assembly, the rotating part of the first connecting rod in the second rotating shaft assembly, and the second bracket, so that the first connecting rod of each rotating shaft assembly is rotatably connected to the base.

[0052] In some embodiments, the base includes a bottom plate, a first side wall and a second side wall arranged opposite to each other in a first direction, and a third side wall and a fourth side wall arranged opposite to each other in a second direction. The bottom plate, the first side wall, the second side wall, the third side wall and the fourth side wall are surrounded to form a receiving groove, the main shaft of each rotating shaft assembly is arranged in the receiving groove, and a part of the compensation mechanism is located in the receiving groove.

[0053] The base also includes a cover plate, which is arranged opposite to the bottom plate in a third direction and is used to support the display screen of the foldable electronic device; wherein the third direction is perpendicular to the first direction and perpendicular to the second direction.

[0054] The cover plate is used to support the foldable part of the display screen. When the foldable electronic device is in the unfolded state, the support plates of each hinge assembly are connected to the cover plate of the base to form a flat plate structure, which jointly supports various parts of the display screen.

[0055] In some embodiments, the hinge device further includes a first damping structure and a second damping structure, and the first damping structure and the second damping structure are respectively arranged on two sides of the base in the first direction.

[0056] Each damping structure in the first damping structure and the second damping structure includes a damping shaft and a damping swing arm. The damping shaft is rotatably connected to the base, and the damping swing arm is fixed to the damping shaft so that the damping swing arm is rotatably connected to the base through the damping shaft. The damping swing arm of the first damping structure is fixedly connected to the main swing arm of the first rotating shaft assembly so that it can rotate relative to the base around the first axis of the first rotating shaft assembly under the drive of the main swing arm; the damping swing arm of the second damping structure is fixedly connected to the main swing arm of the second rotating shaft assembly so that it can rotate relative to the base around the first axis of the second rotating shaft assembly under the drive of the main swing arm.

[0057] Each damping structure also includes at least one damping module, and each damping module in the at least one damping module includes an elastic member, a first gear and a sleeve respectively inserted into the damping shaft, the sleeve is arranged between the elastic member and the first gear in the second direction, the sleeve is sleeved outside the damping shaft, the first gear is arranged on the damping shaft and fixed relative to the damping shaft so that it can rotate relative to the base and relative to the sleeve under the drive of the damping shaft.

[0058] The first gear includes a first end face facing the sleeve, and the sleeve includes a second end face facing the first gear. The elastic member applies elastic force to the sleeve and the first gear through its own deformation, and the first end face and the second end face are pressed against each other.

[0059] By adopting the above solution, the damping structure can generate a damping force, so that the foldable electronic device can hover at a specific angle during the process of opening or folding.

[0060] In some embodiments, each damping structure includes two damping modules, the two damping modules are respectively arranged on both sides of the damping swing arm in the second direction, and the elastic member of each damping module is arranged on the side of the sleeve away from the damping swing arm. In each damping module, one end of the elastic member away from the damping swing arm is fixed relative to the base, and the other end is used to squeeze the sleeve and the first gear.

[0061] In some embodiments, the first gears of the first damping structure and the second damping structure are arranged one by one in the second direction, and a synchronization mechanism is arranged between each pair of corresponding first gears, the synchronization mechanism includes a second gear and a third gear that are meshed with each other, the second gear is meshed with one of the first gears, and the third gear is meshed with the other first gear. When the damping swing arm of any damping structure rotates under the drive of the corresponding shaft assembly, the damping swing arm of the other damping structure is driven to rotate through the synchronization mechanism, and the first shaft assembly and the second shaft assembly rotate synchronously.

[0062] With the above solution, when a user rotates one side structure of the foldable electronic device, the other side structure also rotates synchronously under the action of the synchronization mechanism, which makes it more convenient to use and improves the customer experience.

[0063] An embodiment of the present application also provides a folding device, including a first shell, a second shell, and a hinge device provided by any of the above embodiments, wherein the first shell and the second shell are respectively arranged on both sides of the hinge device in a first direction, the movable plate of the first rotating shaft assembly is fixedly connected to the first shell, and the movable plate of the second rotating shaft assembly is fixedly connected to the second shell, and the first shell and the second shell are displaced in a direction closer to or away from the base when they rotate relative to each other.

[0064] The folding device provided in the embodiment of the present application can adjust the length during the opening and folding of the foldable electronic device, adapt to different shapes of the display screen, and prevent the display screen from being stretched or squeezed.

[0065] An embodiment of the present application also provides a foldable electronic device, including a display screen, and also includes a folding device provided by any of the above embodiments, and the display screen is laid on the folding device; wherein, when the foldable electronic device is in a folded state, the folding device surrounds the outside of the display screen.

[0066] The foldable electronic device provided in the embodiment of the present application can adjust the length of the folding device during the opening and folding process to adapt to different shapes of the display screen and prevent the display screen from being stretched or squeezed. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 A schematic diagram of the structure of a foldable electronic device in an unfolded state;

[0068] Figure 2 A schematic diagram of the structure of a foldable electronic device in a folded state;

[0069] Figure 3a This is a schematic diagram of the structure of a foldable electronic device in an unfolded state according to an embodiment of the present application;

[0070] Figure 3bThis is a schematic diagram of the structure of a foldable electronic device in a folded state according to an embodiment of the present application;

[0071] Figure 3c This is a schematic diagram of the exploded structure of a foldable electronic device according to an embodiment of the present application;

[0072] Figure 4-Figure 5 This is a schematic diagram of the principle structure of the hinge device of the embodiment of the present application, wherein: Figure 4 Corresponding to the unfolded state of the foldable electronic device, Figure 5 Corresponding to the folded state of the foldable electronic device;

[0073] Figure 6a This is a schematic diagram of the three-dimensional structure of the hinge device according to an embodiment of the present application;

[0074] Figure 6b This is a schematic diagram of the top view of the hinge device according to an embodiment of the present application;

[0075] Figure 6c for Figure 6b A partial enlarged view of the middle G part;

[0076] Figure 7a This is a schematic diagram of the structure of the hinge device of the embodiment of the present application without the support plate;

[0077] Figure 7b for Figure 7a A partial enlarged view of the middle H section;

[0078] Figure 7c for Figure 7b Schematic diagram of the structure with the cover removed;

[0079] Figure 7d for Figure 7c A partial enlarged view of part C in the middle;

[0080] Figure 8a This is a schematic diagram of the exploded structure of the hinge device according to an embodiment of the present application;

[0081] Figure 8b for Figure 8a A partial enlarged view of part E in the middle;

[0082] Figure 9a-9b for Figure 7d The cross-sectional view in the AA direction, where: Figure 9a Corresponding to the folded state of the foldable electronic device, Figure 9b Corresponding to the unfolded state of the foldable electronic device;

[0083] Figure 10a-Figure 10b This is a schematic cross-sectional structure diagram of a folding device according to an embodiment of the present application, wherein: Fig.10a Corresponding to the folded state of the foldable electronic device, Fig.10bcorresponds to the unfolded state of the foldable electronic device, and Figure 10a-Figure 10b The cross-sectional position and Figure 9a-9b Consistency;

[0084] Figure 11a-Figure 11b for Figure 7d The cross-sectional view along the BB direction, where: Fig.11a Corresponding to the folded state of the foldable electronic device, Fig.11b Corresponding to the unfolded state of the foldable electronic device;

[0085] Fig.12 It is a structural schematic diagram of the compensation mechanism in the hinge device of the embodiment of the present application;

[0086] Fig.13 It is a schematic diagram of the exploded structure of the compensation mechanism in the hinge device of the embodiment of the present application;

[0087] Fig.14 This is a schematic structural diagram of a main swing arm in a hinge device according to an embodiment of the present application;

[0088] Fig.15 It is a schematic diagram of the assembly structure of the movable plate and the third connecting rod in the hinge device of the embodiment of the present application;

[0089] Fig.16 This is a schematic diagram of the assembly structure of the main swing arm and the movable plate in the hinge device of the embodiment of the present application;

[0090] Fig.17 This is a schematic diagram of the assembly structure of the main swing arm and the movable plate with connecting rod in the hinge device of the embodiment of the present application;

[0091] Fig.18 This is a schematic diagram of the assembly structure of the main swing arm, the movable plate and the support plate in the hinge device of the embodiment of the present application;

[0092] Fig.19 This is a schematic diagram of the exploded structure of the main swing arm, the movable plate and the support plate in the hinge device of the embodiment of the present application;

[0093] Fig. 20 This is a schematic diagram of the assembly structure of the support plate and the movable plate in the hinge device of the embodiment of the present application;

[0094] Fig.21 This is a schematic diagram of the assembly structure of the support plate and the main swing arm in the hinge device of the embodiment of the present application;

[0095] Fig. 22 for Figure 7c A partial enlarged view of part D in the middle;

[0096] Fig.23 It is a schematic diagram of the three-dimensional structure of the damping structure in the hinge device of the embodiment of the present application;

[0097] Fig.24 It is a schematic diagram of the decomposed structure of the damping structure in the hinge device of the embodiment of the present application.

[0098] Description of reference numerals:

[0099] One solution:

[0100] 100', foldable electronic devices;

[0101] 1', folding device; 11', first shell; 12', second shell; 13', hinge device;

[0102] 2', display screen; 21', foldable part.

[0103] This application:

[0104] 100. Hinge device;

[0105] 1. base; 10. receiving groove; 11. first side wall; 12. second side wall;

[0106] 13. third side wall; 14. fourth side wall; 15. bottom plate; 16. cover plate;

[0107] 21. First rotating shaft assembly; 22. Second rotating shaft assembly;

[0108] 23, main shaft; 230, shaft hole; 231, first shaft body; 232, second shaft body;

[0109] 24. Eccentric shaft; 25. Concentric shaft; 26. Rotating connecting shaft;

[0110] 27, fixed bracket; 271, first bracket; 272, second bracket;

[0111] 281, first fixing seat; 282, second fixing seat;

[0112] 3. Compensation institutions;

[0113] 31. first connecting rod; 311. concentric portion; 3111. first connecting portion; 312. rotating portion; 313. first connecting plate;

[0114] 32, second connecting rod; 321, concentric portion; 3211, second connecting portion; 322, rotating portion; 323, second connecting plate;

[0115] 33. third connecting rod; 331. concentric portion; 3311. third connecting portion; 332. rotating portion; 333. third connecting plate;

[0116] 4. main swing arm; 41. main body; 411. first hollow portion; 412. groove; 42. connecting arm; 43. slider;

[0117] 44. connecting platform; 441. connecting bracket; 442. sliding rod;

[0118] 5. movable plate; 51. main body; 511. first convex block; 512. second convex block; 513. third convex block; 514. second hollow portion;

[0119] 52. Rotating connecting member; 521. Rotating arm; 53. Slide rail; 54. Arc slide rail;

[0120] 6. Support plate; 61. Plate body; 62. First boss; 620. Arc hole; 63. Second boss;

[0121] 71. a first damping structure; 72. a second damping structure;

[0122] 73, damping shaft; 74, damping swing arm; 741, fixing plate; 742, rotating arm;

[0123] 75, damping module; 751, elastic member; 752, first gear; 7521, first end face;

[0124] 753, shaft sleeve; 7531, second end surface;

[0125] 76, synchronization mechanism; 761, second gear; 762, third gear;

[0126] 200, folding device;

[0127] 81. a first shell; 82. a second shell;

[0128] 300. Foldable electronic devices;

[0129] 9. display screen; 91. first part; 92. second part; 93. foldable part;

[0130] Q1, first axis; Q2, second axis; Q3, third axis;

[0131] Q4, fourth axis; Q5, fifth axis; Q6, sixth axis;

[0132] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0133] The following specific embodiments illustrate the implementation of the present application, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Although the description of the present application will be introduced in conjunction with some embodiments, this does not mean that the features of this application are limited to the implementation. On the contrary, the purpose of introducing the application in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present application. In order to provide a deep understanding of the present application, the following description will include many specific details. The present application can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present application, some specific details will be omitted in the description. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0134] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0135] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "top", "bottom", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0136] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0137] In the description of the present application, it should be understood that "electrical connection" in the present application can be understood as physical contact and electrical conduction between components; it can also be understood as a form in which different components in a circuit structure are connected through physical lines such as printed circuit board (PCB) copper foil or wires that can transmit electrical signals.

[0138] In the description of the present application, it should be noted that the mutual perpendicularity in the present application is not absolute perpendicularity, and the approximate perpendicularity caused by processing errors and assembly errors (for example, the angle between the two structural features is 89.9°) is also within the scope of mutual perpendicularity in the present application. The mutual parallelism in the present application is also not absolute parallelism, and the approximate parallelism caused by processing errors and assembly errors (for example, the angle between the two structural features is 0.1°) is also within the scope of mutual parallelism in the present application. The axisymmetry in the present application is not absolute axisymmetry, and the approximate axisymmetry caused by processing errors and assembly errors (for example, part of the structure is offset by a certain distance or angle relative to the axis of symmetry) is also within the scope of axisymmetry in the present application. The central symmetry in the present application is not absolute central symmetry, and the approximate central symmetry caused by processing errors and assembly errors (for example, part of the structure is offset by a certain distance or angle relative to the axis of symmetry) is also within the scope of central symmetry in the present application. This application does not make specific restrictions on this.

[0139] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0140] With the development of flexible display screens, foldability has become an important direction for the development of electronic devices. A foldable electronic device includes two parts that can rotate relative to each other, and the two parts are connected by a hinge device to realize the folding and unfolding of the foldable electronic device to meet different usage scenarios. The foldable electronic device as a whole is composed of a folding device (also called a shell assembly, and the hinge device is arranged in the folding device) and a display screen, and the display screen is laid on one side of the folding device. When the foldable electronic device is folded and unfolded, the display screen folds and unfolds together with the folding device. However, since the folding device and the display screen are stacked and both have a certain thickness, there is a path difference between the display screen and the folding device during the folding and unfolding process. It is necessary to adjust the length of the folding device during the unfolding and folding of the foldable electronic device to adapt to the different forms of the display screen. In actual products, the two ends of the display screen are often fixed on the folding device. If the length of the folding device cannot be adjusted during the folding and unfolding process, the display screen will be squeezed or stretched, thereby damaging the display screen.

[0141] In order to more clearly illustrate the path difference between the display screen and the folding device during the unfolding and folding process, the following is an analysis based on the structure of an inward-folding electronic device.

[0142] See also Figure 1-Figure 2 , Figure 1 A schematic diagram of the structure of a foldable electronic device in an unfolded state; Figure 2 The figure is a schematic diagram of the structure of a foldable electronic device in a folded state.

[0143] like Figure 1-Figure 2 As shown, the foldable electronic device 100' includes a folding device 1', and a display screen 2' laid on the folding device 1'. The folding device 1' includes a first shell 11', a second shell 12' and a hinge device 13'. Assuming that the display screen 2' is not fixed to the folding device 1', when the foldable electronic device 100' is in the unfolded state, the length of the display screen 2' and the folding device 1' are consistent. At this time, the first shell 11' and the second shell 12' are rotated to switch the foldable electronic device 100' to the folded state, and the foldable part 21' of the display screen 2', that is, the part of the display screen 2' that is overlapped with the hinge device 13', is folded in a curved shape (common curved shapes include arc shape, water drop shape, etc., and the figure takes the arc shape as an example).

[0144] When the overall length of the folding device 1' remains unchanged, the folding device 1' is bent in a straight angle shape, and the foldable portion 21' of the display screen 2' cannot fit the bent shape of the folding device 1'. Therefore, the foldable electronic device 100' will present a straight angle shape after being folded. Figure 2 In the state shown, the display screen 2' is misaligned with the folding device 1', and both ends thereof protrude from the folding device 1', which shows that there is a folding path difference between the two. In actual scenarios, the two ends of the display screen 2' are respectively fixed on the first shell 11' and the second shell 12'. In this case, when folding and unfolding, the display screen 2' needs to change its own shape to adapt to the different forms of the folding device 1', causing the display screen 2' to be squeezed or stretched. For example, assuming that the length of the display screen 2' and the folding device 1' are exactly adapted in the unfolded state, the display screen 2' will be squeezed in the folded state. In other words, assuming that the length of the display screen 2' and the folding device 1' are exactly adapted in the folded state, the display screen 2' will be stretched in the unfolded state. In either case, the display screen 2' will be damaged.

[0145] It can be seen that the foldable electronic devices in the prior art cannot adjust the length of the folding device, which causes the display screen to be squeezed or stretched during the folding and unfolding process, facing the risk of damage.

[0146] In order to solve the above technical problems, the embodiment of the present application provides a hinge device, which adjusts the length of the folding device during the unfolding and folding of the foldable electronic device by setting a compensation mechanism in the hinge device to prevent the display screen from being stretched or squeezed. In addition, the structure of the compensation mechanism is stable, the assembly error is small, and the motion trajectory is highly accurate. In addition, the overall structure of the compensation mechanism is relatively compact and occupies little space, which is conducive to the narrow frame design of the foldable electronic device and maximizes the display screen.

[0147] The present application also provides a foldable electronic device, which can be, but is not limited to, a foldable electronic product such as a mobile phone, a tablet computer, a laptop computer, a wearable device, etc. The present application embodiment does not impose any special restrictions on the specific form of the above-mentioned foldable electronic device. For the convenience of description, the following description is made using a mobile phone as an example.

[0148] See also Figure 3a to Figure 3c , Figure 3a This is a schematic diagram of the structure of a foldable electronic device in an unfolded state according to an embodiment of the present application; Figure 3b This is a schematic diagram of the structure of a foldable electronic device in a folded state according to an embodiment of the present application; Figure 3c This is a schematic diagram of the exploded structure of a foldable electronic device according to an embodiment of the present application.

[0149] like Figure 3a to Figure 3c As shown, the foldable electronic device 300 includes a display screen 9 and a folding device 200, and the display screen 9 is laid on one side of the folding device 200. Among them, the display screen 9 is used for image presentation and human-computer interaction, and can be, but not limited to, an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED) display screen or a quantum dot light-emitting diode (QLED) display screen, etc., and this application does not impose any restrictions on this. The display screen 9 is connected to a side surface of the folding device 200. The side surface of the display screen 9 facing away from the folding device 200 is its display surface, and the display surface is used to display information and provide an interactive interface for the user.

[0150] The folding device 200 is also called a housing assembly, and is used to carry and accommodate the display screen 9 and other electronic components. The folding device 200 includes a first housing 81, a second housing 82, and a hinge device 100. The first housing 81 and the second housing 82 are respectively arranged on both sides of the hinge device 100 in the first direction X. The first direction X can be the base 1 of the hinge device 100 (see Figure 4, and the introduction of the base 1 will be described in detail below) is the width direction, which is also the length direction of the foldable electronic device 300 in the unfolded state. The first shell 81 and the second shell 82 are used to install the display screen 9 and various electronic components, and the hinge device 100 is used to rotatably connect the first shell 81 and the second shell 82 to achieve the folding and unfolding of the foldable electronic device 300. In one embodiment, the first shell 81 and the second shell 82 have a storage space inside to accommodate some electronic components. Among them, the electronic components include but are not limited to circuit boards, batteries, camera modules, microphones, speakers, etc., and this application does not limit this.

[0151] The foldable electronic device 300 has a folded state and an unfolded state, for example, Figure 3a As shown, when the foldable electronic device 300 is in the unfolded state, the opening angle thereof is 180°, that is, the angle between the first shell 81 and the second shell 82 is 180°. Those skilled in the art will appreciate that the opening angle of the foldable electronic device 300 may also be 90°, 120°, 210°, etc., and the present application does not limit this, and the angles illustrated in the present application are all allowed to have slight deviations. For example, when the foldable electronic device 300 is in the unfolded state, the opening angle thereof may be 180°, or may be approximately 180°, such as 170°, 175°, 185° or 190°, etc., and the same understanding may be given to other angles hereinafter. When the first shell 81 and the second shell 82 are rotated relative to each other to overlap each other, the foldable electronic device 300 is in the unfolded state. Figure 3b In the closed state shown, the angle between the first shell 81 and the second shell 82 can be approximately regarded as 0°. In one embodiment, the foldable electronic device 300 is an inward folding electronic device. When the foldable electronic device 300 is in the folded state, the folding device 200 is entirely surrounded by the outside of the display screen 9.

[0152] It should be noted that the specific structure of the display screen 9 is not limited. In one embodiment. The display screen 9 includes a first part 91, a second part 92 and a foldable part 93, the first part 91 is fixedly connected to the first shell 81, the second part 92 is fixedly connected to the second shell 82, and the foldable part 93 is located between the first part 91 and the second part 92, and is stacked with the hinge device 100. During the use of the foldable electronic device 300, the first part 91 and the second part 92 always maintain a planar state, and the foldable part 93 can be bent to change the angle between the first part 91 and the second part 92, so that the display screen 9 is folded or unfolded with the movement of the folding device 200. Exemplarily, the foldable part 93 can be made of a flexible material so that the foldable part 93 can be bent.

[0153] It should be noted that when the foldable electronic device 300 is in the folded state, the foldable portion 93 of the display screen 9 is bent in any manner. Figure 3b As shown, in one embodiment, the foldable portion 93 of the display screen 9 is bent in a teardrop shape, so that the foldable portion 93 of the display screen 9 has a larger bending radius, so that the display screen 9 is not prone to "stress relaxation" when it is bent for a long time, reducing the risk of creases when the display screen 9 is unfolded. In other alternative embodiments, the foldable portion 93 of the display screen 9 can also be bent in an arc shape or other shapes, which are not listed one by one in this application.

[0154] In one embodiment, when the foldable electronic device 300 is in a folded state, the hinge device 100 avoids and forms a storage space in a direction away from the display screen 9, so that the foldable portion 93 of the flexible display screen 9 can be stored in the storage space formed by the hinge device 100, and the hinge device 100 also limits and protects the foldable portion 93 of the flexible display screen 9, thereby preventing the foldable portion 93 of the display screen 9 from being excessively deformed when subjected to external impact, thereby causing obvious creases or direct damage.

[0155] Furthermore, in the folding device 200, the first housing 81 and the second housing 82 are displaced in the direction of approaching or moving away from the hinge device 100 when they rotate relative to each other, so as to adjust the overall length of the folding device 200, adapt to different forms of the display screen 9, and prevent the display screen 9 from being squeezed or stretched during the unfolding and folding process. The structure and working principle of the hinge device 100 are described below in conjunction with the accompanying drawings to more clearly illustrate the adjustment effect of the hinge device 100 on the length of the folding device 200.

[0156] See also Figure 4-Figure 5 , Figure 4-Figure 5 This is a schematic diagram of the principle structure of the hinge device of the embodiment of the present application, wherein: Figure 4 Corresponding to the unfolded state of the foldable electronic device, Figure 5 Corresponding to the folded state of the foldable electronic device.

[0157] like Figure 4-Figure 5 As shown, the hinge device 100 includes a base 1, a first rotating shaft assembly 21 and a second rotating shaft assembly 22. The first rotating shaft assembly 21 and the second rotating shaft assembly 22 are respectively arranged on both sides of the base 1 in a first direction X and are rotatably connected to the base 1. Each rotating shaft assembly rotates relative to the base 1, so that the first rotating shaft assembly 21 and the second rotating shaft assembly 22 rotate relative to each other.

[0158] Further, each of the first rotating shaft assembly 21 and the second rotating shaft assembly 22 includes a main swing arm 4, a movable plate 5 and a compensation mechanism 3. The movable plate 5 is slidably connected to the main swing arm 4, and the movable plate 5 is rotatably connected to the base 1 through the main swing arm 4, and the rotation axis is the first axis Q1.

[0159] The manner in which the main swing arm 4 is rotatably connected to the base 1 is not limited. In one embodiment, each base 1 is provided with a main shaft 23, and the main swing arm 4 is rotatably connected to the base 1 through the main shaft 23, so that the main swing arm 4 rotates relative to the base 1 around the first axis Q1. The first axis Q1 is along the second direction Y( Figure 4 and Figure 5 The second direction Y is the extension direction of the main axis 23 and is perpendicular to the first direction X. The second direction Y can be understood as the length direction of the base 1, and can also be understood as the width direction of the foldable electronic device 300 in the unfolded state. In one embodiment, the main swing arm 4 is fixedly connected to the main axis 23, and the main axis 23 rotates relative to the base 1 around the first axis Q1, so that the main swing arm 4 rotates relative to the base 1 around the first axis Q1. In other alternative embodiments, the main axis 23 may be fixed relative to the base 1, and the main swing arm 4 may rotate relative to the main axis 23 around the first axis Q1, and the present application does not limit this. When the main axis 23 is fixed relative to the base 1, the main axis 23 and the base 1 may be a split structure or an integrated structure, and the present application does not limit this.

[0160] like Figure 4-Figure 5 As shown, the compensation mechanism 3 includes a first connecting rod 31, a second connecting rod 32 and a third connecting rod 33, each of which includes a concentric portion and a rotating portion arranged at intervals, and the concentric portions of each connecting rod are rotatably connected to each other, so that any two connecting rods rotate relative to each other around the second axis Q2. Or it can be understood that the connecting rods are concentrically connected, and the second axis Q2 is the concentric axis.

[0161] The first connecting rod 31 is rotatably connected to the base 1 through the rotating portion 312 of the first connecting rod 31, so that the concentric portion of each connecting rod rotates relative to the base 1 around the third axis Q3. The second connecting rod 32 is rotatably connected to the base 1 through the rotating portion 322 of the second connecting rod 32, and the rotating portion 322 of the second connecting rod 32 is installed on the main shaft 23 or the main swing arm 4, so that it rotates relative to the base 1 around the first axis Q1 under the drive of the main swing arm 4, and drives the concentric portion of each connecting rod to rotate relative to the base 1 around the third axis Q3. The third connecting rod 33 is rotatably connected to the movable plate 5 through the rotating portion 332 of the third connecting rod 33, so that the movable plate 5 and the third connecting rod 33 rotate relative to each other around the fourth axis Q4. Among them, the second axis Q2, the third axis Q3 and the fourth axis Q4 all extend along the second direction Y.

[0162] Or it can be understood that the rotating portion 322 of the second connecting rod 32 rotates eccentrically around the first axis Q1, driving the concentric portion 321 of the second connecting rod 32 to rotate around the third axis Q3, thereby controlling the displacement of the concentric axis (the second axis Q2), and finally transmitting the motion to the rotating portion 332 of the third connecting rod 33 through the third connecting rod 33. Among them, the rotating portion 322 of the second connecting rod 32 can be installed on the main shaft 23 or on the main swing arm 4, and this application does not limit this. In one embodiment, the rotating portion 322 of the second connecting rod 32 is installed on the main shaft 23.

[0163] When the main swing arm 4 rotates relative to the base 1, the movable plate 5 slides relative to the main swing arm 4 driven by the main swing arm 4 and the compensation mechanism 3 to generate displacement in a direction close to or away from the base 1. The movable plate 5 of the first rotating shaft assembly 21 is fixedly connected to the first housing 81 of the foldable electronic device 300, and the movable plate 5 of the second rotating shaft assembly 22 is fixedly connected to the second housing 82 of the foldable electronic device 300.

[0164] The hinge device 100 provided in the embodiment of the present application is used to realize the unfolding and folding of the foldable electronic device 300. The first housing 81 of the foldable electronic device 300 is mounted on the movable plate 5 of the first rotating shaft assembly 21, and the second housing 82 is mounted on the movable plate 5 of the second rotating shaft assembly 22. During the folding process of the foldable electronic device 300, the main swing arms 4 of the first rotating shaft assembly 21 and the second rotating shaft assembly 22 rotate relative to the base 1, respectively, so that the main swing arms 4 of each rotating shaft assembly rotate relatively, thereby driving the movable plates 5 of each rotating shaft assembly to rotate relatively, so that the first housing 81 and the second housing 82 of the foldable electronic device 300 rotate relatively.

[0165] The movable plate 5 is slidably connected to the main swing arm 4, and a compensation mechanism 3 is provided in each rotating shaft assembly. The compensation mechanism 3 includes a first connecting rod 31, a second connecting rod 32, and a third connecting rod 33. The concentric parts of the three connecting rods are concentrically connected, and the second axis Q2 is a concentric axis. When the foldable electronic device 300 is folded and unfolded, the movement trajectory of the second axis Q2 is jointly controlled by the rotation of the first connecting rod 31 relative to the base 1 and the eccentric movement of the rotating part 322 of the second connecting rod 32, so that the second axis Q2 rotates relative to the base 1 and drives the movement of the rotating part 332 of the third connecting rod 33, so as to drive the movable plate 5 to slide relative to the main swing arm 4. Driven by the main swing arm 4 and the compensation mechanism 3, the movable plate 5 slides relative to the main swing arm 4, and is displaced in the direction of approaching or moving away from the base 1, thereby changing the distance between the movable plate 5 and the base 1.

[0166] Furthermore, the first shell 81 and the second shell 82 of the foldable electronic device 300 are also displaced toward or away from the base 1 under the drive of each movable plate 5, and the overall length of the folding device 200 composed of the first shell 81, the second shell 82 and the hinge device 100 is also adjusted to adapt to different forms of the display screen 9. For example, in an inward-folding electronic device, when the foldable electronic device 300 is in an unfolded state, the movable plates 5 of each rotating shaft assembly are closer to the base 1, and the overall length of the folding device 200 is shorter. When the foldable electronic device 300 is in a folded state, the movable plates 5 of each rotating shaft assembly are farther from the base 1, and the overall length of the folding device 200 is longer, so it can adapt to the length of the display screen 9 and prevent the display screen 9 from being stretched or squeezed.

[0167] The following is a systematic description of the motion relationship of the various components in the hinge assembly 100 in conjunction with a specific scenario when the user uses the foldable electronic device 300: When the foldable electronic device 300 switches from the unfolded state to the folded state, the user moves the first shell 81 or the second shell 82 of the foldable electronic device 100 (or both shells can be moved at the same time), and the moved shell transmits the force applied by the user to the movable plate 5 in the rotating shaft assembly where it is located, and then transmits the force to the main swing arm 4 through the movable plate 5. The main swing arm 4 rotates relative to the base 1 around the first axis Q1 through the main shaft 23, and the shell, the movable plate 5 and the main swing arm 4, as well as the part of the display screen 9 corresponding to the shell, rotate synchronously relative to the base 1. At the same time, the main swing arm 4 drives the rotating portion 322 of the second connecting rod 32 to rotate relative to the base 1 around the first axis Q1, and the first connecting rod 31 rotates relative to the base 1 around the third axis Q3 driven by the second connecting rod 32. Under the joint action of the first connecting rod 31 and the second connecting rod 32, the concentric part of each connecting rod rotates relative to the base 1 around the third axis Q3 (that is, the second axis Q2 rotates around the third axis Q3). Further, the concentric part 311 of the third connecting rod 33 also rotates relative to the base 1 around the third axis Q3, and transmits the motion to the rotating part 332 of the third connecting rod 33, and the rotating part 332 of the third connecting rod 33 moves in a direction away from the base 1, then the movable plate 5 slides relative to the main swing arm 4 under the joint action of the shell and the third connecting rod 33, and produces a displacement in a direction away from the base 1. At the same time, the movable plate 5 and the third connecting rod 33 rotate relative to each other around the fourth axis Q4. When the foldable electronic device 300 switches from the folded state to the unfolded state, the movement path of each component is opposite to the above path.

[0168] It can be seen that the hinge device 100 provided in the present application can adjust the length of the folding device 200 in the foldable electronic device 300, thereby preventing the display screen 9 from being squeezed or stretched during the folding and unfolding process, thereby preventing the display screen 9 from being damaged.

[0169] Furthermore, the three connecting rods in the compensation mechanism 3 rotate together around the second axis Q2, that is, they share a concentric axis, the structure is stable, the assembly error is small, and the motion trajectory of each connecting rod is highly accurate. In addition, the overall structure of the compensation mechanism 3 is relatively compact, and the space occupied is small. It can be set below the display screen 9 (that is, set in the installation space between the display screen 9 and the base 1), and there is no need to set the compensation mechanism 3 on both sides of the base 1 in the length direction of the base 1 (that is, the second direction Y) in order to avoid the display screen 9, which is conducive to the narrow frame design of the foldable electronic device and maximizes the display screen.

[0170] It should be noted that Figure 4-Figure 5 It is only a schematic diagram of the principle of the hinge device 100 and does not represent the actual structure of the hinge device 100. The present application does not limit the specific structure of each component in the hinge device 100. The following examples are used in conjunction with the accompanying drawings to illustrate possible structures of the hinge device 100.

[0171] Please refer to Figure 6- Fig.13 , Figure 6a This is a schematic diagram of the three-dimensional structure of the hinge device according to an embodiment of the present application; Figure 6b This is a schematic diagram of the top view of the hinge device according to an embodiment of the present application; Figure 6c for Figure 6b A partial enlarged view of the middle G part; Figure 7a This is a schematic diagram of the structure of the hinge device of the embodiment of the present application without the support plate; Figure 7b for Figure 7a A partial enlarged view of the middle H section; Figure 7c for Figure 7b Schematic diagram of the structure with the cover removed; Figure 7d for Figure 7c A partial enlarged view of part C in the middle; Figure 8a This is a schematic diagram of the exploded structure of the hinge device according to an embodiment of the present application; Figure 8b for Figure 8a A partial enlarged view of part E in the middle; Figure 9a-9b for Figure 7d The cross-sectional view along the AA direction, where: Figure 9a Corresponding to the folded state of the foldable electronic device, Figure 9b Corresponding to the unfolded state of the foldable electronic device; Figure 10a-Figure 10b This is a schematic cross-sectional structure diagram of a folding device according to an embodiment of the present application, wherein: Fig.10a Corresponding to the folded state of the foldable electronic device, Fig.10b corresponds to the unfolded state of the foldable electronic device, and Figure 10a-Figure 10b The cross-sectional position and Figure 9a-9b Consistency; Figure 11a-Figure 11b for Figure 7d The cross-sectional view along the BB direction, where: Fig.11a Corresponding to the folded state of the foldable electronic device, Fig.11bCorresponding to the unfolded state of the foldable electronic device; Fig.12 It is a structural schematic diagram of the compensation mechanism in the hinge device of the embodiment of the present application; Fig.13 Schematic diagram of the decomposed structure of the compensation mechanism in the hinge device of the embodiment of the present application. Figure 9a-9b , Figure 11a-Figure 11b A support plate 6 is also added, and the function of the support plate 6 will be explained later.

[0172] Those skilled in the art will appreciate that the number of the first rotating shaft assembly 21 and the second rotating shaft assembly 22 is not limited, and can be 1, 2, 3 or more, and the number of the first rotating shaft assembly 21 and the second rotating shaft assembly 22 can be equal or unequal. Figure 6a-Figure 7a As shown, in one embodiment, the hinge device 100 includes three first rotating shaft components 21 and three second rotating shaft components 22 arranged at intervals in the second direction Y, and the three first rotating shaft components 21 and the three second rotating shaft components 22 are arranged one by one. The provision of multiple rotating shaft components allows the foldable electronic device 300 to be subjected to more uniform force during the unfolding and folding process, and the rotation feel at each location remains consistent.

[0173] It will be understood by those skilled in the art that the specific structure of the base 1 is not limited. Figure 6a-Figure 11b As shown, in one embodiment, the base 1 includes a bottom plate 15, a first side wall 11 and a second side wall 12 arranged opposite to each other in a first direction X, and a third side wall 13 and a fourth side wall 14 arranged opposite to each other in a second direction Y. The bottom plate 15, the first side wall 11, the second side wall 12, the third side wall 13 and the fourth side wall 14 surround and form a receiving groove 10, the main shaft 23 of each rotating shaft assembly is arranged in the receiving groove 10, and a part of the compensation mechanism 3 is located in the receiving groove 10. Or it can be understood that the base 1 is arranged as a groove structure as a whole, the main shaft 23 is accommodated in the base 1, and a part of the compensation mechanism 3 is located in the base 1, and a part extends out of the base 1, and is connected with the main swing arm 4 and the movable plate 5 and other components.

[0174] It can be understood by those skilled in the art that the positional relationship between the first axis Q1 and the third axis Q3 in the compensation mechanism 3 of each rotating shaft assembly is not limited. In one embodiment, the third axis Q3 is located on the side of the first axis Q1 close to another rotating shaft assembly in the first direction X. Or it can be understood that the third axis Q3 of each rotating shaft assembly is located between the main shafts 23 of the two rotating shaft assemblies in the first direction X. With this structure, the third axis Q3 of the first rotating shaft assembly 21 and the second rotating shaft assembly 22 can overlap and share, saving space.

[0175] like Figure 8b-Figure 11bAs shown, in one embodiment, the hinge device 100 further includes a fixed bracket 27, and the fixed bracket 27 is disposed on the base 1. The rotating portion 312 of the first connecting rod 31 in each rotating shaft assembly is rotatably connected to the fixed bracket 27, so that the first connecting rod 31 of each rotating shaft assembly is rotatably connected to the base 1, and the third axis Q3 of each rotating shaft assembly coincides. Or it can be understood that the first rotating shaft assembly 21 and the second rotating shaft assembly 22 share a third axis Q3. This design is relatively compact and reduces the space occupied by the hinge device 100 in the first direction X. It should be noted that the fixed bracket 27 can be a component fixed to the base 1 (that is, the fixed bracket 27 and the base 1 are a split structure), or it can be set as an integrated structure with the base 1, and the present application does not limit this.

[0176] It should be noted that the specific structure of the fixed bracket 27 and the specific connection method between each first connecting rod 31 and the fixed bracket 27 are not limited. In one embodiment, the fixed bracket 27 includes a first bracket 271 and a second bracket 272 spaced apart in the second direction Y, the rotating portion 312 of the first connecting rod 31 in each rotating shaft assembly is arranged between the first bracket 271 and the second bracket 272, and the rotating portion 312 of the first connecting rod 31 in the first rotating shaft assembly 21 is rotatably connected to the first bracket 271, and the rotating portion 322 of the second connecting rod 32 in the second rotating shaft assembly 22 is rotatably connected to the second bracket 272. The hinge device 100 further includes a fixed shaft (not shown in the figure), the first bracket 271, the second bracket 272, and the rotating portion 312 of the first connecting rod 31 in each rotating shaft assembly are all configured as sleeve structures and are arranged concentrically in the second direction Y. The fixed shaft is sequentially arranged through the first bracket 271, the rotating portion 312 of the first connecting rod 31 in the first rotating shaft assembly 21, the rotating portion 312 of the first connecting rod 31 in the second rotating shaft assembly 22, and the second bracket 272, so that the first connecting rod 31 of each rotating shaft assembly is rotatably connected to the base 1. In other alternative embodiments, only one bracket may be provided in the fixed bracket 27, and the first connecting rod 31 of each rotating shaft assembly may also be connected to the same bracket, which is not limited in the present application.

[0177] Those skilled in the art can understand that the structure of each connecting rod in the compensation mechanism 3 is not limited, and the connection method of each connecting rod with other components is not limited.

[0178] like Figure 9a-Figure 11bAs shown, in one embodiment, the rotating portion 322 of the second connecting rod 32 is mounted on the eccentric shaft 24, and is mounted on the main shaft 23 through the eccentric shaft 24. When the main swing arm 4 rotates, it drives the main shaft 23 and the eccentric shaft 24 on the main shaft 23 to rotate, thereby driving the rotating portion 322 of the second connecting rod 32 to rotate. Or it can be understood that in the process of the main swing arm 4 rotating relative to the base 1, the main swing arm 4 and the main shaft 23 are relatively fixed, and the main shaft 23 rotates relative to the base 1 around the first axis Q1, thereby driving the eccentric shaft 24 to rotate around the first axis Q1. Since the rotating portion 322 of the second connecting rod 32 is mounted on the eccentric shaft 24, the rotating portion 322 of the second connecting rod 32 also rotates around the first axis Q1 driven by the eccentric shaft 24.

[0179] In one embodiment, the eccentric shaft 24 of each rotating shaft assembly is inserted into the main shaft 23. The rotating portion 322 of the second connecting rod 32 is set as a sleeve structure and is sleeved on the outer periphery of the eccentric shaft 24. When the rotating portion 322 of the second connecting rod 32 rotates relative to the base 1 around the first axis Q1 under the drive of the main swing arm 4, the second connecting rod 32 rotates relative to the main shaft 23 around the fifth axis Q5, and the fifth axis Q5 is the axis of the eccentric shaft 24 and is parallel to the first axis Q1. With this structure, the connection strength and stability of the eccentric shaft 24 and the main shaft 23 are high, and the motion trajectory accuracy of the rotating portion 322 of the second connecting rod 32 is high.

[0180] It will be understood by those skilled in the art that the specific connection method between the eccentric shaft 24 and the main shaft 23 is not limited. Figure 8b As shown, in one embodiment, a shaft hole 230 is provided on the main shaft 23, and the shaft hole 230 and the axis of the main shaft 23 are spaced apart in the radial direction of the main shaft 23, and the eccentric shaft 24 is inserted into the shaft hole 230. In the radial direction of the main shaft 23, the eccentric shaft 24 can be located in the main shaft 23 as a whole, or only a part of the structure can be located in the main shaft 23, and the present application does not limit this. In one embodiment, the shaft hole 230 is provided on the outer wall surface of the main shaft 23, and a notch is formed on the outer wall surface of the main shaft 23, and a part of the structure of the eccentric shaft 24 is embedded in the main shaft 23 along the radial direction of the main shaft 23. The notch is provided on the outer wall surface of the main shaft 23 to facilitate the installation of the eccentric shaft 24 on the main shaft 23.

[0181] It will be understood by those skilled in the art that the structure of the concentric parts of each connecting rod is not limited. Figure 12-13 As shown, combined with Figure 6a-Figure 11bIt is understood that, in one embodiment, the concentric portion 311 of the first connecting rod 31 includes a first connecting portion 3111, the concentric portion 321 of the second connecting rod 32 includes two second connecting portions 3211 spaced apart in the second direction Y, and the concentric portion 331 of the third connecting rod 33 includes two third connecting portions 3311 spaced apart in the second direction Y. Along the second direction Y, the two third connecting portions 3311 of the third connecting rod 33 are disposed between the two second connecting portions 3211 of the second connecting rod 32, and the first connecting portion 3111 of the first connecting rod 31 is disposed between the two third connecting portions 3311 of the third connecting rod 33. Or it can be understood that the concentric portions of each connecting rod are nested in the second direction Y, and the structure is compact.

[0182] It should be noted that the manner in which the concentric parts of each connecting rod are rotatably connected to each other is not limited. In one embodiment, the compensation mechanism 3 further includes a concentric shaft 25, each of the first connecting part 3111, the two second connecting parts 3211, and the two third connecting parts 3311 is configured as a sleeve structure, and each connecting part is arranged concentrically in the second direction Y, and the concentric shaft 25 is penetrated in each connecting part so that any two connecting rods rotate relative to each other around the second axis Q2. Among them, the number of concentric shafts 25 is not limited, and can be 1 or 2. For example, only one concentric shaft 25 can be provided, and one concentric shaft 25 runs through all the connecting parts of each connecting rod. Alternatively, two concentric shafts 25 can also be provided in the second direction Y, wherein one concentric shaft 25 rotatably connects the first connecting part 3111, one of the second connecting parts 3211, and one of the third connecting parts 3311, and the other concentric shaft 25 rotatably connects the first connecting part 3111, another second connecting part 3211, and another third connecting part 3311. The connecting rods are connected by the coaxial shaft 25, so the structure is stable and the assembly error is small. In other alternative embodiments, the coaxial shaft 25 may not be provided, for example, the connecting parts of the connecting rods may be hinged to each other to achieve rotational connection.

[0183] like Figure 12-13 As shown, in one embodiment, the rotating portion 312 of the first connecting rod 31 is connected to the first connecting portion 3111 via a first connecting plate 313, the rotating portion 322 of the second connecting rod 32 is connected to the two second connecting portions 3211 via a second connecting plate 323, and the rotating portion 332 of the third connecting rod 33 is connected to the two third connecting portions 3311 via a third connecting plate 333. Among them, the first connecting plate 313, the second connecting plate 323 and the third connecting plate 333 are all configured as a plate-like structure, which is relatively stable, not easy to deform, and has high reliability. In addition, the connecting rod of the plate-like structure can be processed into a bent shape according to the shape and position of each component in the actual product, so as to avoid other structural parts, such as the appearance parts ( Figure 9a-9bThe cover plate 16 in the middle is avoided to reduce the opening on the appearance part, so that the product has a complete appearance. In other alternative embodiments, the rotating part and the connecting part of each connecting rod can also be connected by a rod-like structure, a sheet-like structure, etc., and this application does not limit this.

[0184] It should be noted that the rotating part, connecting part, and connecting plate of each connecting rod can be integrally formed or can be a split structure. In one embodiment, the rotating part, the first connecting part 3111, and the first connecting plate 313 of the first connecting rod 31 are arranged as an integral structure. The rotating part, the two second connecting parts 3211, and the second connecting plate 323 of the second connecting rod 32 are arranged as an integral structure. The rotating part, the two third connecting parts 3311, and the third connecting plate 333 of the third connecting rod 33 are arranged as an integral structure. Each connecting rod is an integrally formed structure, which is more firm and simplifies the production and installation process.

[0185] See also Figure 14-17 , Fig.14 This is a schematic structural diagram of a main swing arm in a hinge device according to an embodiment of the present application; Fig.15 It is a schematic diagram of the assembly structure of the movable plate and the third connecting rod in the hinge device of the embodiment of the present application; Fig.16 This is a schematic diagram of the assembly structure of the main swing arm and the movable plate in the hinge device of the embodiment of the present application; Fig.17 It is a schematic diagram of the assembly structure of the main swing arm and the movable plate with connecting rod in the hinge device of the embodiment of the present application.

[0186] It will be understood by those skilled in the art that the specific structures of the main swing arm 4 and the movable plate 5 are not limited. Figure 14-17 As shown, in one embodiment, the main swing arm 4 includes a main body 41 and two connecting arms 42 connected to the main body 41, the two connecting arms 42 are fixedly connected to the main shaft 23, and the main shaft 23 rotates around the first axis Q1 relative to the base 1 under the drive of the main swing arm 4, so that the main swing arm 4 rotates around the first axis Q1 relative to the base 1.

[0187] Among them, the specific structure of the main shaft 23 and the connection method between the connecting arm 42 and the main shaft 23 are not limited. In one embodiment, the main shaft 23 includes a first shaft body 231 and a second shaft body 232 arranged at intervals in the second direction Y, and each connecting arm 42 of the two connecting arms 42 of the main swing arm 4 is configured as a sleeve structure, one of the two connecting arms 42 is sleeved and fixed on the first shaft body 231, and the other is sleeved and fixed on the second shaft body 232, so that the first shaft body 231 and the second shaft body 232 of the main shaft 23 rotate synchronously under the drive of the main swing arm 4. A first hollow portion 411 is provided on the main body 41 of the main swing arm 4, and the first hollow portion 411 is located between the two connecting arms 42 in the second direction Y, and is connected to the space between the two connecting arms 42, so that an accommodation space is formed around the two connecting arms 42 and the main body 41, and the compensation mechanism 3 is located in the accommodation space as a whole. Or it can be understood that the main shaft 23 is broken into two parts, and a first hollow portion 411 is set on the main swing arm 4, thereby avoiding the structure of the compensation mechanism 3, and accommodating the compensation mechanism 3 in the cavity between the main shaft 23 and the main swing arm 4, so that the overall structure of the hinge device 100 is more compact and space-saving.

[0188] In one embodiment, the movable plate 5 includes a main body 51, and the main body 41 of the main swing arm 4 is stacked with the main body 51 of the movable plate 5 and slidably connected via a sliding structure. The number of sliding structures is not limited, and can be 1, 2, 3, etc. Each sliding structure in the sliding structure includes a slide rail 53 and a slider 43 that are slidably connected to each other, and one of the slide rail 53 and the slider 43 is arranged on the main body 51 of the movable plate 5, and the other is arranged on the main body 41 of the main swing arm 4, and the present application does not limit this.

[0189] In one embodiment, the main body 51 of the movable plate 5 is provided with a first protrusion 511, a second protrusion 512 and a third protrusion 513 which are sequentially arranged at intervals along the second direction Y, and each of the first protrusion 511, the second protrusion 512 and the third protrusion 513 protrudes from the main body 51 toward the side close to the main swing arm 4. The main body 41 of the main swing arm 4 is located as a whole between the first protrusion 511 and the third protrusion 513 in the second direction Y, and a groove 412 corresponding to the second protrusion 512 is provided on the main body 41, and the second protrusion 512 is embedded in the groove 412 and slides in the groove 412. Along the second direction Y, a slide rail 53 is formed between the first protrusion 511 and the second protrusion 512, and a slide rail 53 is formed between the second protrusion 512 and the third protrusion 513, and the parts of the main body 41 of the main swing arm 4 located on both sides of the groove 412 respectively constitute a slider 43, and each slider 43 corresponds to each slide rail 53. Or it can be understood that the main body 41 of the main swing arm 4 is slidably connected with the main body 51 of the movable plate 5 through two sliding structures. The main body 41 of the main swing arm 4 is divided into two parts by the groove 412, each part constitutes a slider 43, and each slider 43 slides between the two protrusions of the movable plate 5. The main body 41 itself is designed as a slider 43, the structure is simple, and the area of ​​the main swing arm 4 and the movable plate 5 for sliding connection is large.

[0190] like Fig.15 As shown, in one embodiment, the movable plate 5 further includes a rotating connecting member 52 connected to the main body 51, and the rotating connecting member 52 is rotatably connected to the rotating portion 332 of the third connecting rod 33, so that the third connecting rod 33 is rotatably connected to the movable plate 5. Among them, the rotating connecting member 52 and the main body 51 of the movable plate 5 can be a split structure or an integrated structure, and the present application does not limit this. Among them, the specific structure of the rotating connecting member 52 is not limited. In one embodiment, the rotating connecting member 52 of the movable plate 5 includes two rotating arms 521 arranged at intervals along the second direction Y, and the rotating portion 332 of the third connecting rod 33 is arranged between the two rotating arms 521. The rotating portion 332 of the third connecting rod 33 and the two connecting arms 42 of the movable plate 5 are both configured as sleeve structures and are arranged concentrically along the second direction Y. The compensation mechanism 3 also includes a rotating connecting shaft 26, which is inserted through the rotating portion 332 of the third connecting rod 33 and the two connecting arms 42 of the movable plate 5, so that the third connecting rod 33 is rotatably connected to the movable plate 5. In other alternative embodiments, the rotating connecting shaft 26 may not be provided. For example, the rotating portion of the third connecting rod 33 may be hinged to the two connecting arms 42 of the movable plate 5 to achieve relative rotation therebetween, and the present application does not impose any limitation on this.

[0191] See also Figure 18-Figure 21 , Fig.18 This is a schematic diagram of the assembly structure of the main swing arm, the movable plate and the support plate in the hinge device of the embodiment of the present application; Fig.19This is a schematic diagram of the exploded structure of the main swing arm, the movable plate and the support plate in the hinge device of the embodiment of the present application; Fig. 20 This is a schematic diagram of the assembly structure of the support plate and the movable plate in the hinge device of the embodiment of the present application; Fig.21 It is a schematic diagram of the assembly structure of the support plate and the main swing arm in the hinge device of the embodiment of the present application.

[0192] like Figure 18-Figure 21 As shown, in one embodiment, each rotating shaft assembly further includes a support plate 6, which is used to support the display screen 9 of the foldable electronic device 300 and is stacked on the side of the movable plate 5 away from the main swing arm 4. The support plate 6 is slidably connected to the movable plate 5 and the main swing arm 4 respectively. When the main swing arm 4 rotates relative to the base 1 around the first axis Q1, the support plate 6 slides relative to the main swing arm 4 driven by the movable plate 5, and slides relative to the movable plate 5 along an arc track, so that the support plate 6 rotates relative to the movable plate 5 around the sixth axis Q6, and the sixth axis Q6 extends along the second direction Y. Or it can be understood that during the rotation of the main swing arm 4, the support plate 6 not only slides relative to the main swing arm 4 with the movable plate 5, but also rotates relative to the movable plate 5, so that the support plate 6 and the movable plate 5 present different angles to support the display screen 9 in different states.

[0193] For example, Figure 9b , Fig.10b , Fig.11b As shown, when the foldable electronic device 300 is in the unfolded state, the support plates 6 of each hinge assembly are opened relative to the movable plate 5 and fit with the display screen 9 in the flattened state. Figure 9a , Fig.10a , Fig.11a As shown, when the foldable electronic device 300 is in a folded state, the support plates 6 of each hinge assembly rotate to fit with the movable plate 5, avoiding the foldable portion 93 of the display screen 9 and guiding the foldable portion 93 to bend in a water drop shape.

[0194] like Figure 6a to Figure 6b As shown, in one embodiment, in order to simplify the production and processing technology, the support plates 6 of the three first rotating shaft assemblies 21 in the hinge device 100 are set as an integrated structure, and the support plates 6 of the three second rotating shaft assemblies 22 are set as an integrated structure. In other alternative embodiments, the support plates 6 of each first rotating shaft assembly 21 can also be set separately, and the support plates 6 of each second rotating shaft assembly 22 can also be set separately, and the present application does not limit this.

[0195] like Figures 6a to 7b , Figures 9a to 11bAs shown, in one embodiment, the base 1 further includes a cover plate 16, which is arranged opposite to the bottom plate 15 in the third direction Z and is used to support the display screen 9 of the foldable electronic device 300. The cover plate 16 is used to support the foldable portion 93 of the display screen 9. Exemplarily, when the foldable electronic device 300 is in the unfolded state, the support plates 6 of each hinge assembly and the cover plate 16 of the base 1 can be connected to form a flat plate structure to jointly support various parts of the display screen 9. The third direction Z is perpendicular to the first direction X and the second direction Y. It should be noted that the third direction Z can be understood as the thickness direction of the base 1, and can also be understood as the thickness direction of the foldable electronic device 300 in the unfolded state.

[0196] It will be understood by those skilled in the art that the specific structure of the support plate 6 is not limited. Figure 18-Figure 21 As shown, in one embodiment, the support plate 6 includes a plate body 61, a first boss 62, and two second bosses 63 respectively located on both sides of the first boss 62 in the second direction Y. Each of the first boss 62 and the two second bosses 63 is connected to the plate body 61 and protrudes from the plate body 61 toward the side close to the main swing arm 4. The movable plate 5 is located as a whole between the two second bosses 63 of the support plate 6 in the second direction Y. Arc-shaped slide rails 54 are provided at both ends of the movable plate 5. Each of the two second bosses 63 is provided in an arc-shaped structure and slides in the corresponding arc-shaped slide rail 54, so that the support plate 6 slides relative to the movable plate 5 along the arc-shaped track.

[0197] In one embodiment, the main swing arm 4 includes a connection platform 44 protruding from the main body 41 toward the side close to the support plate 6, and a second hollow portion 514 is provided on the main body 51 of the movable plate 5. The connection platform 44 of the main swing arm 4 and the first boss 62 of the support plate 6 are both accommodated in the second hollow portion 514 of the movable plate 5 and are slidably connected to each other, so that the support plate 6 is slidably connected to the movable plate 5. Or it can be understood that the movable plate 5 is stacked between the main swing arm 4 and the support plate 6, and in order to avoid the connection between the main swing arm 4 and the support plate 6, the corresponding position on the movable plate 5 is hollowed out to avoid it.

[0198] The specific structures of the first boss 62 and the connecting platform 44 are not limited. In one embodiment, an arc hole 620 is provided on the first boss 62 of the support plate 6, and the arc hole 620 penetrates the first boss 62 along the second direction Y and extends along an arc in a plane perpendicular to the second direction Y. The connecting platform 44 of the main swing arm 4 includes two connecting brackets 441 spaced apart in the second direction Y, and the first boss 62 is located between the two connecting brackets 441. The connecting platform 44 of the main swing arm 4 also includes a sliding rod 442, both ends of the sliding rod 442 are installed on the two connecting brackets 441, and the sliding rod 442 is penetrated in the arc hole 620 of the first boss 62, and the sliding rod 442 slides in the arc hole 620, so that the support plate 6 slides relative to the main swing arm 4 along an arc track. In other alternative embodiments, the support plate 6 and the main swing arm 4 can also be slidably connected by structures such as sliders and slide grooves, and this application does not limit this.

[0199] See also Figure 22-Figure 24 , Fig. 22 for Figure 7c A partial enlarged view of part D in the middle; Fig.23 It is a schematic diagram of the three-dimensional structure of the damping structure in the hinge device of the embodiment of the present application; Fig.24 It is a schematic diagram of the decomposed structure of the damping structure in the hinge device of the embodiment of the present application.

[0200] like Figure 22-Figure 24 As shown, in one embodiment, the hinge device 100 further includes a damping structure, which can generate a damping force so that the foldable electronic device 300 can hover at a specific angle during the process of opening or folding.

[0201] Specifically, the damping structure includes a first damping structure 71 and a second damping structure 72, and the first damping structure 71 and the second damping structure 72 are respectively arranged on both sides of the base 1 in the first direction X. The specific number of the first damping structure 71 and the second damping structure 72 is not limited, and both can be 1, 2 or more, and the number of the first damping structure 71 and the second damping structure 72 can be the same or different, and the present application does not limit this.

[0202] Each damping structure includes a damping shaft 73 and a damping swing arm 74. The damping shaft 73 is rotatably connected to the base 1. The damping swing arm 74 is fixed to the damping shaft 73, so that the damping swing arm 74 is rotatably connected to the base 1 through the damping shaft 73. The damping swing arm 74 of the first damping structure 71 is fixedly connected to the main swing arm 4 of the first rotating shaft assembly 21, so that it rotates relative to the base 1 around the first axis Q1 of the first rotating shaft assembly 21 under the drive of the main swing arm 4. The damping swing arm 74 of the second damping structure 72 is fixedly connected to the main swing arm 4 of the second rotating shaft assembly 22, so that it rotates relative to the base 1 around the first axis Q1 of the second rotating shaft assembly 22 under the drive of the main swing arm 4. When the user rotates any part of the foldable electronic device 300, the main swing arm 4 rotates to drive the corresponding damping swing arm 74 to rotate, and the damping force is transmitted to the user through the damping swing arm 74. The specific structure of the damping swing arm 74 is not limited. In one embodiment, the damping swing arm 74 includes a fixed plate 741 and two rotating arms 742 connected to the fixed plate 741, and the fixed plate 741 is fixedly connected to the corresponding main swing arm 4. The two rotating arms 742 are spaced apart in the second direction Y and are both sleeved on the damping shaft 73.

[0203] Furthermore, each damping structure also includes a damping module 75. The damping module 75 is a core component for generating damping force, and the specific number thereof is not limited, and each damping structure may include one or more damping modules 75. In one embodiment, each damping structure includes two damping modules 75, and the two damping modules 75 are respectively arranged on both sides of the damping swing arm 74 in the second direction Y.

[0204] It should be noted that the specific structure of the damping module 75 is not limited. In one embodiment, each damping module 75 includes an elastic member 751, a first gear 752 and a sleeve 753 respectively inserted into the damping shaft 73, the sleeve 753 is arranged between the elastic member 751 and the first gear 752 in the second direction Y, the sleeve 753 is sleeved outside the damping shaft 73, the first gear 752 is arranged on the damping shaft 73 and fixed relative to the damping shaft 73, so as to rotate relative to the base 1 under the drive of the damping shaft 73, and rotate relative to the sleeve 753. The first gear 752 includes a first end face 7521 facing the sleeve 753, the sleeve 753 includes a second end face 7531 facing the first gear 752, and the elastic member 751 applies elastic force to the sleeve 753 and the first gear 752 through its own deformation, so that the first end face 7521 and the second end face 7531 are pressed against each other. Or it can be understood that the shaft sleeve 753 and the first gear 752 are matched through the end faces. During the folding and unfolding process of the foldable electronic device 300, the end faces of the two rotate relative to each other and squeeze each other under the squeezing force of the elastic member 751, generating friction, which is the damping force. Some uneven structures can be set on the first end face 7521 and the second end face 7531, so that the friction between the two changes with the angle of opening or folding of the foldable electronic device 300, and this application does not limit this. Among them, the elastic member 751 can be a spring, etc., and this application does not limit this.

[0205] Those skilled in the art can understand that the friction force can only be generated by the relative rotation of the sleeve 753 and the first gear 752 in the damping module 75, so the first gear 752 rotates relative to the damping shaft 73, and rotates with the damping shaft 73 under the drive of the damping swing arm 74, and the sleeve 753 rotates relative to the damping shaft 73, so that it can rotate relative to the first gear 752. In one embodiment, the first damping structure 71 and the second damping structure 72 are correspondingly arranged in the first direction X below the sleeve 753, and the corresponding two sleeves 753 are arranged as an integral structure, so that each sleeve 753 can rotate relative to its respective damping shaft 73. In other alternative embodiments, the first gear 752 can also rotate relative to the damping shaft 73, and the sleeve 753 can be fixed relative to the damping shaft 73, so that the first gear 752 and the sleeve 753 can rotate relative to each other, and the present application does not limit this.

[0206] It can be understood by those skilled in the art that the elastic member 751 is used to provide a squeezing force to the first gear 752 and the shaft sleeve 753, and the specific location of the elastic member 751 is not limited, as long as the first gear 752 and the shaft sleeve 753 can be squeezed against each other. In one embodiment, the elastic member 751 of each damping module 75 is disposed on a side of the shaft sleeve 753 away from the damping swing arm 74. In each damping module 75, one end of the elastic member 751 away from the damping swing arm 74 is fixed relative to the base 1, and the other end is used to squeeze the shaft sleeve 753 and the first gear 752.

[0207] In other alternative embodiments, the damping module 75 may also adopt other structures. For example, a concave cam group may be provided in the damping module 75, and the concave wheel and the cam in the concave cam group rotate relative to each other, and the elastic member 751 squeezes the concave cam group so that the concave wheel and the cam rub relative to each other to generate a damping force.

[0208] like Figure 22-Figure 24 As shown, in one embodiment, each first gear 752 of the first damping structure 71 and the second damping structure 72 is arranged one by one in the second direction Y, and a synchronization mechanism 76 is arranged between each pair of corresponding first gears 752, and the synchronization mechanism 76 includes a second gear 761 and a third gear 762 that mesh with each other, the second gear 761 meshes with one of the first gears 752, and the third gear 762 meshes with the other first gear 752. When the damping swing arm 74 of any damping structure rotates under the drive of the corresponding shaft assembly, the damping swing arm 74 of the other damping structure is driven to rotate through the synchronization mechanism 76, so that the first shaft assembly 21 and the second shaft assembly 22 rotate synchronously. With this structure, when the user rotates one side structure of the foldable electronic device 300, the other side structure also rotates synchronously under the action of the synchronization mechanism 76, which is more convenient when used and improves the customer experience. In other alternative embodiments, the synchronization mechanism 76 can also be set in other forms, and this application is not limited to this.

[0209] like Figure 8a , Figure 8b and Fig. 22 As shown, in one embodiment, the hinge device 100 further includes a first fixing seat 281 and a second fixing seat 282, both of which are arranged on the base 1 and fixed relative to the base 1. The number of the first fixing seat 281 and the second fixing seat 282 is not limited. In one embodiment, a first fixing seat 281 is arranged between an adjacent set of rotating shaft components (including a first rotating shaft component 21 and a second rotating shaft component 22 correspondingly arranged in the first direction X) and a set of damping structures (including a first damping structure 71 and a second damping structure 72 correspondingly arranged in the first direction X), and a second fixing seat 282 is arranged between two rotating arms 742 of each damping swing arm 74 in each set of damping structures. The first fixing seat 281 and the second fixing seat 282 support the adjacent components in the hinge device 100 and improve the overall structural strength of the hinge device 100. The first fixing seat 281 and the second fixing seat 282 can be integrally formed with the base 1, or can be arranged as a split structure with the base 1, and the present application does not limit this.

[0210] In one embodiment, the first fixing seat 281 can be used to install and support the main shaft 23 of each rotating shaft assembly and the damping shaft 73 of each damping structure, for example Figure 8b In the embodiment, the second shaft body 232 of the main shaft 23 in each rotating shaft assembly is mounted on the first fixing seat 281 and is rotatably connected to the first fixing seat 281, and the damping shaft 73 of each damping mechanism is also mounted on the first fixing seat 281 and is rotatably connected to the first fixing seat 281. In addition, the fixed end of the elastic member 751 in each damping structure (i.e., the end away from the damping swing arm 74 in the second direction Y) abuts against the first fixing seat 281. In one embodiment, the second fixing seat 282 is used to mount the damping shaft 73 (e.g. Fig.24 Each damping shaft 74 is mounted on the second fixed seat 282 and is rotatably connected to the second fixed seat 282). On the other hand, the second fixed seat 282 is arranged between the two rotating arms 742 of each damping swing arm 74 to strengthen the strength of the damping swing arm 74 and reduce the risk of breakage of the rotating arm 742 of the damping swing arm 74.

[0211] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and modifications of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and modifications.

Claims

1. A hinge device, comprising a base, a first rotating shaft assembly and a second rotating shaft assembly, wherein the first rotating shaft assembly and the second rotating shaft assembly are respectively arranged on both sides of the base in a first direction and are rotatably connected to the base, characterized in that: Each of the first rotating shaft assembly and the second rotating shaft assembly comprises: A main swing arm, wherein a main shaft is disposed on the base, and the main swing arm is rotatably connected to the base via the main shaft, so that the main swing arm rotates relative to the base around a first axis; wherein the first axis extends along a second direction, the second direction is the extension direction of the main shaft, and the second direction is perpendicular to the first direction; A movable plate, wherein the movable plate is rotatably connected to the base through the main swing arm, the rotation axis is the first axis, and the movable plate is slidably connected to the main swing arm; A compensation mechanism, the compensation mechanism comprising a first connecting rod, a second connecting rod and a third connecting rod, each of the first connecting rod, the second connecting rod and the third connecting rod comprises a concentric portion and a rotating portion arranged at intervals, the concentric portions of each connecting rod are rotatably connected to each other, and the rotation axis between any two connecting rods is a second axis; The first connecting rod is rotatably connected to the base through the rotating part of the first connecting rod, so that the concentric parts of each connecting rod rotate relative to the base around a third axis; the second connecting rod is rotatably connected to the base through the rotating part of the second connecting rod, and the rotating part of the second connecting rod is installed on the main shaft or the main swing arm, so that it rotates relative to the base around the first axis under the drive of the main swing arm, and drives the concentric parts of each connecting rod to rotate relative to the base around the third axis; the third connecting rod is rotatably connected to the movable plate through the rotating part of the third connecting rod, and the rotation axis between the movable plate and the third connecting rod is a fourth axis; wherein the second axis, the third axis and the fourth axis all extend along the second direction; When the main swing arm rotates relative to the base, the movable plate slides relative to the main swing arm driven by the main swing arm and the compensation mechanism to generate displacement in a direction close to or away from the base.

2. The hinge device according to claim 1, characterized in that each of the rotating shaft assemblies further comprises an eccentric shaft, and the rotating portion of the second connecting rod is mounted on the main shaft through the eccentric shaft and is rotatably connected to the main shaft; The eccentric shaft is inserted into the main shaft, and the rotating part of the second connecting rod is configured as a sleeve structure and is sleeved on the outer periphery of the eccentric shaft. When the rotating part of the second connecting rod rotates around the first axis relative to the base under the drive of the main swing arm, the second connecting rod rotates around the fifth axis relative to the main shaft. The fifth axis is the axis center of the eccentric shaft and is parallel to the first axis.

3. The hinge device according to claim 2, characterized in that: The main shaft is provided with an axial hole, the axial hole and the axis of the main shaft are spaced apart in the radial direction of the main shaft, and the eccentric shaft is inserted into the axial hole; The shaft hole is arranged on the outer wall surface of the main shaft, and a notch is formed on the outer wall surface of the main shaft. Along the radial direction of the main shaft, a part of the structure of the eccentric shaft is embedded in the main shaft.

4. The hinge device according to any one of claims 1 to 3, characterized in that: In each of the rotating shaft assemblies, the third axis is located on a side of the first axis close to another of the rotating shaft assemblies in the first direction.

5. The hinge device according to any one of claims 1 to 4, characterized in that: In each of the rotating shaft assemblies, the concentric portion of the first connecting rod includes a first connecting portion, the concentric portion of the second connecting rod includes two second connecting portions spaced apart in the second direction, and the concentric portion of the third connecting rod includes two third connecting portions spaced apart in the second direction; Along the second direction, the two third connecting portions of the third connecting rod are arranged between the two second connecting portions of the second connecting rod, and the first connecting portion of the first connecting rod is arranged between the two third connecting portions of the third connecting rod; The compensation mechanism also includes a coaxial shaft. Each of the first connecting part, the two second connecting parts, and the two third connecting parts is configured as a sleeve structure, and each connecting part is concentrically arranged in the second direction. The coaxial shaft passes through each connecting part, so that any two connecting rods can rotate relative to each other around the second axis.

6. The hinge device according to claim 5, characterized in that: The rotating part of the first connecting rod is connected to the first connecting part via a first connecting plate, the rotating part of the second connecting rod is connected to the two second connecting parts via a second connecting plate, and the rotating part of the third connecting rod is connected to the two third connecting parts via a third connecting plate; The first connecting plate, the second connecting plate and the third connecting plate are all configured as plate-shaped structures.

7. The hinge device according to claim 6, characterized in that: The rotating part of the first connecting rod, the first connecting part and the first connecting plate are arranged as an integrated structure; the rotating part of the second connecting rod, the two second connecting parts and the second connecting plate are arranged as an integrated structure; the rotating part of the third connecting rod, the two third connecting parts and the third connecting plate are arranged as an integrated structure.

8. The hinge device according to any one of claims 1 to 7, characterized in that: The main swing arm includes a main body and two connecting arms connected to the main body, the two connecting arms are fixedly connected to the main shaft, and the main shaft rotates around the first axis relative to the base under the drive of the main swing arm, so that the main swing arm rotates around the first axis relative to the base; The movable plate includes a main body and a rotatable connecting member connected to the main body, wherein the rotatable connecting member is rotatably connected to the rotating portion of the third connecting rod, so that the third connecting rod is rotatably connected to the movable plate; The main body of the main swing arm and the main body of the movable plate are stacked and slidably connected by at least one sliding structure; each sliding structure in the at least one sliding structure includes a sliding rail and a slider that are slidably connected to each other, one of the sliding rail and the slider is arranged on the main body of the movable plate, and the other is arranged on the main body of the main swing arm.

9. The hinge device according to claim 8, characterized in that: The main shaft comprises a first shaft body and a second shaft body spaced apart in the second direction, each of the two connecting arms of the main swing arm is configured as a sleeve structure, one of the two connecting arms is sleeved and fixed to the first shaft body, and the other is sleeved and fixed to the second shaft body, and when each of the rotating shaft assemblies rotates relative to the base, the first shaft body and the second shaft body of the main shaft rotate synchronously; A first hollow portion is provided on the main body of the main swing arm. The first hollow portion is located between the two connecting arms in the second direction and is connected to the space between the two connecting arms. An accommodating space is formed between the two connecting arms and the main body, and the compensation mechanism is located as a whole in the accommodating space.

10. The hinge device according to claim 8 or 9, characterized in that: The rotating connecting member of the movable plate comprises two rotating arms spaced apart along the second direction, and the rotating portion of the third connecting rod is arranged between the two rotating arms; The rotating part of the third connecting rod and the two connecting arms of the movable plate are both configured as sleeve structures and are centrally arranged along the second direction. The compensation mechanism also includes a rotating connecting shaft, which passes through the rotating part of the third connecting rod and the two connecting arms of the movable plate, so that the third connecting rod is rotatably connected to the movable plate.

11. The hinge device according to any one of claims 8 to 10, characterized in that: The main body of the main swing arm is slidably connected to the main body of the movable plate via two sliding structures; The main body of the movable plate is provided with a first protrusion, a second protrusion and a third protrusion which are sequentially arranged at intervals along the second direction, and each of the first protrusion, the second protrusion and the third protrusion protrudes from the main body toward a side close to the main swing arm; The main body of the main swing arm is located as a whole between the first protrusion and the third protrusion in the second direction, and a groove corresponding to the second protrusion is provided on the main body, and the second protrusion is embedded in the groove and slides in the groove; Along the second direction, a slide rail is formed between the first protrusion and the second protrusion, a slide rail is formed between the second protrusion and the third protrusion, and the parts of the main body of the main swing arm located on both sides of the groove respectively constitute a slider, and each slider corresponds to each slide rail one by one.

12. The hinge device according to any one of claims 8 to 11, characterized in that: Each of the rotating shaft assemblies further comprises a support plate, which is used to support the display screen of the foldable electronic device and is stacked on a side of the movable plate away from the main swing arm; The support plate is slidably connected to the movable plate and the main swing arm respectively. When the main swing arm rotates relative to the base around the first axis, the support plate slides relative to the main swing arm driven by the movable plate and slides relative to the movable plate along an arc trajectory. The support plate rotates relative to the movable plate around a sixth axis, and the sixth axis extends along the second direction.

13. The hinge device according to claim 12, characterized in that: The support plate includes a plate body, a first boss, and two second bosses respectively located on both sides of the first boss in the second direction, wherein the first boss and each of the two second bosses are connected to the plate body and protrude from the plate body toward a side close to the main swing arm; The main swing arm includes a connecting platform protruding from the main body toward a side close to the support plate, and a second hollow portion is provided on the main body of the movable plate. The connecting platform of the main swing arm and the first boss of the support plate are both accommodated in the second hollow portion of the movable plate and are slidably connected to each other, so that the support plate is slidably connected to the movable plate; The movable plate is located as a whole between the two second bosses of the support plate in the second direction, and arc-shaped slide rails are arranged at both ends of the movable plate. Each of the two second bosses is arranged in an arc-shaped structure and slides in the corresponding arc-shaped slide rail, and the support plate slides relative to the movable plate along the arc-shaped track.

14. The hinge device according to claim 13, characterized in that: An arc-shaped hole is provided on the first boss of the support plate, the arc-shaped hole penetrates the first boss along the second direction and extends along an arc line in a plane perpendicular to the second direction, the connecting platform of the main swing arm includes two connecting brackets spaced apart in the second direction, and the first boss is located between the two connecting brackets; The connecting platform of the main swing arm also includes a sliding rod, both ends of which are installed on the two connecting brackets, and the sliding rod is inserted into the arc hole of the first boss. The sliding rod slides in the arc hole, so that the support plate slides along an arc trajectory relative to the main swing arm.

15. The hinge device according to any one of claims 1 to 14, characterized in that: The hinge device also includes a fixed bracket arranged on the base, and the rotating part of the first connecting rod in each of the rotating shaft assemblies is rotatably connected to the fixed bracket, so that the first connecting rod of each of the rotating shaft assemblies is rotatably connected to the base, and the third axes of each of the rotating shaft assemblies coincide.

16. The hinge device according to claim 15, characterized in that The fixed bracket includes a first bracket and a second bracket arranged at intervals in the second direction, the rotating portion of the first connecting rod in each of the rotating shaft assemblies is arranged between the first bracket and the second bracket, and the rotating portion of the first connecting rod in the first rotating shaft assembly is rotatably connected to the first bracket, and the rotating portion of the second connecting rod in the second rotating shaft assembly is rotatably connected to the second bracket; The hinge device also includes a fixed shaft, and the first bracket, the second bracket, and the rotating part of the first connecting rod in each of the rotating shaft assemblies are all configured as sleeve structures and are centrally arranged in the second direction. The fixed shaft is sequentially passed through the first bracket, the rotating part of the first connecting rod in the first rotating shaft assembly, the rotating part of the first connecting rod in the second rotating shaft assembly, and the second bracket, so that the first connecting rod of each of the rotating shaft assemblies is rotatably connected to the base.

17. The hinge device according to any one of claims 1 to 16, characterized in that: The base comprises a bottom plate, a first side wall and a second side wall arranged opposite to each other in a first direction, and a third side wall and a fourth side wall arranged opposite to each other in the second direction, wherein the bottom plate, the first side wall, the second side wall, the third side wall and the fourth side wall surround and form a receiving groove, the main shaft of each of the rotating shaft assemblies is arranged in the receiving groove, and a part of the compensation mechanism is located in the receiving groove; The base also includes a cover plate, which is arranged opposite to the bottom plate in a third direction and is used to support the display screen of the foldable electronic device; wherein the third direction is perpendicular to the first direction and perpendicular to the second direction.

18. The hinge device according to claim 17, characterized in that The hinge device further comprises a first damping structure and a second damping structure, wherein the first damping structure and the second damping structure are respectively arranged on two sides of the base in the first direction; Each damping structure in the first damping structure and the second damping structure includes a damping shaft and a damping swing arm, the damping shaft is rotatably connected to the base, the damping swing arm is fixed to the damping shaft, so that the damping swing arm is rotatably connected to the base through the damping shaft, the damping swing arm of the first damping structure is fixedly connected to the main swing arm of the first rotating shaft assembly, so that it rotates relative to the base around the first axis of the first rotating shaft assembly under the drive of the main swing arm; the damping swing arm of the second damping structure is fixedly connected to the main swing arm of the second rotating shaft assembly, so that it rotates relative to the base around the first axis of the second rotating shaft assembly under the drive of the main swing arm; Each of the damping structures further comprises at least one damping module, wherein each of the at least one damping module comprises an elastic member, a first gear and a shaft sleeve respectively arranged on the damping shaft, the shaft sleeve is arranged between the elastic member and the first gear in the second direction, the shaft sleeve is sleeved outside the damping shaft, the first gear is arranged on the damping shaft and fixed relative to the damping shaft, so as to rotate relative to the base and relative to the shaft sleeve under the drive of the damping shaft; The first gear includes a first end face facing the sleeve, and the sleeve includes a second end face facing the first gear. The elastic member applies elastic force to the sleeve and the first gear through its own deformation, and the first end face and the second end face are pressed against each other.

19. The hinge device according to claim 18, characterized in that Each of the damping structures comprises two damping modules, the two damping modules are respectively arranged on both sides of the damping swing arm in the second direction, and the elastic member of each damping module is arranged on a side of the shaft sleeve away from the damping swing arm; In each of the damping modules, one end of the elastic member away from the damping swing arm is fixed relative to the base, and the other end is used to squeeze the bushing and the first gear.

20. The hinge device according to claim 18 or 19, characterized in that: The first gears of the first damping structure and the second damping structure are arranged one by one in the second direction, and a synchronization mechanism is arranged between each pair of corresponding first gears, and the synchronization mechanism includes a second gear and a third gear that are meshed with each other, the second gear is meshed with one of the first gears, and the third gear is meshed with the other first gear. When the damping swing arm of any one of the damping structures rotates driven by the corresponding rotating shaft assembly, the damping swing arm of the other damping structure is driven to rotate through the synchronization mechanism, and the first rotating shaft assembly and the second rotating shaft assembly rotate synchronously.

21. A folding device, characterized in that: It includes a first shell, a second shell, and a hinge device as described in any one of claims 1-20, the first shell and the second shell are respectively arranged on both sides of the hinge device in the first direction, the movable plate of the first rotating shaft assembly is fixedly connected to the first shell, and the movable plate of the second rotating shaft assembly is fixedly connected to the second shell, and the first shell and the second shell are displaced in a direction closer to or away from the base when they rotate relative to each other.

22. A foldable electronic device, comprising a display screen, characterized in that: It also includes a folding device as described in claim 21, wherein the display screen is laid on the folding device; wherein, when the foldable electronic device is in a folded state, the folding device surrounds the outside of the display screen.

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