A foldable hinge and module for an inwardly folding flexible screen device terminal

Abstract

This utility model relates to the field of folding hinge technology, specifically to a foldable hinge and its module for an inward-folding flexible screen device terminal. The foldable hinge includes a base and two connectors spaced apart along a second axis (Y). The base is rotatably connected to a connector on each side parallel to the first axis (X) via rotating arms, and slidably connected to a connector on each side parallel to the first axis (X) via a set of sliding arms. The two sets of sliding arms are respectively fitted onto a rotating shaft connected to the base along the first axis (X) and rotate around the corresponding rotating shaft via a synchronous transmission structure. A torque control structure cooperating with the sliding arms is fitted onto the rotating shaft. This utility model, through the design of the connectors, base, sliding arms, rotating arms, synchronous transmission structure, and torque control structure, ensures that the opening and closing process meets customer requirements under different operating conditions, avoiding screen compression or stretching.

Description

Technical Field

[0001] This utility model relates to the field of folding hinge technology, and more specifically, to a foldable hinge and its module for an inwardly folding flexible screen device terminal. Background Technology

[0002] A flexible screen is a display screen that can be bent and folded, and is characterized by its thinness and high plasticity.

[0003] The development of flexible screen technology has made the design of electronic device terminals more diversified. The inward folding design provides greater portability and a larger display area, but it also brings many challenges.

[0004] Inward-folding flexible screen devices require folding hinges during use to ensure the screen can be properly flattened or folded, thereby extending the screen's lifespan. When folding left or right, the hinges need to be able to bend synchronously with the screen to ensure that the screen is not squeezed or stretched during the bending process, and that the screen is not squeezed or suspended after folding; when unfolding, the hinges need to ensure that the screen's supporting surface is horizontal. Utility Model Content

[0005] In view of this, the present invention provides a foldable hinge and its module for an inwardly folding flexible screen device terminal, which aims to solve the above-mentioned technical problems.

[0006] In one aspect, the present invention provides a foldable hinge for an inwardly folding flexible screen device terminal, comprising a base and two connectors spaced apart along a second axis Y. The base is rotatably connected to one of the connectors on both sides parallel to the first axis X via rotating arms, and the base is slidably connected to one of the connectors on both sides parallel to the first axis X via a set of sliding arms. The two sets of sliding arms are respectively sleeved on a rotating shaft connected to the base along the first axis X, and rotate around the corresponding rotating shaft via a synchronous transmission structure. A torque control structure cooperating with the sliding arms is sleeved on the rotating shaft.

[0007] In some embodiments of this application, the two connecting members drive the corresponding rotating arm and sliding arm to move relative to or towards each other, and the rotation angle of the rotating arm is greater than the rotation angle of the sliding arm, so that the two connecting members form a teardrop-shaped space when they move towards each other to the folded position.

[0008] In some embodiments of this application, the sliding arm includes a gear arm and a gear arm assembly, and a limiting structure is provided between the gear arm and the gear arm assembly.

[0009] In some embodiments of this application, the limiting structure includes a limiting sleeve sleeved on the two rotating shafts. The limiting sleeve sleeved on both sides of the rotating shafts has a spacer portion extending into the spacer portion between the gear arm and the gear arm assembly. The spacer portion is provided with a limiting surface one and a limiting surface two on both sides parallel to the second axis Y direction. The gear arm and the gear arm assembly are provided with limiting portions on their opposite inner sides. The limiting portions rotate around the rotating shaft between the corresponding limiting surface one and limiting surface two.

[0010] In some embodiments of this application, the torque control structure includes a first cam sleeved on the two rotating shafts and located on both sides of the two sets of sliding arms, a second cam disposed on both sides of the two sets of sliding arms parallel to the second axis Y direction and cooperating with the first cam, and an elastic member sleeved on the other end of the two rotating shafts connected to the base, wherein the two ends of the elastic member abut against a second cam and a bushing sleeve sleeved on one end of the rotating shaft, respectively.

[0011] In some embodiments of this application, the synchronous transmission structure includes at least two meshing pinions and an external gear disposed on at least a portion of the outer wall of the sliding arm sleeved on the rotating shaft, the external gear meshing with an adjacent pinion.

[0012] In some embodiments of this application, one end of the pinion passes through a second cam away from the base via an extension shaft and abuts against the bushing. An elastic member two is sleeved on one end of the extension shaft passing through the second cam. The other end of the pinion is engaged with the limiting sleeve via a snap-fit ​​portion.

[0013] In some embodiments of this application, a retaining ring is provided between one end of the two rotating shafts that extends into the base and an adjacent second cam, and the retaining ring is sleeved on the retaining groove of the rotating shaft.

[0014] In some embodiments of this application, one end of the rotating arm extends into the connector and is connected to the connector via a connecting shaft, while the other end of the rotating arm extends into the arcuate groove of the connector via an arcuate connecting portion and is rotatably connected to the connector.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: First, the connecting member drives the rotating arm to rotate around the connection point with the base, while simultaneously driving the sliding arm to rotate around the rotation axis connected to the base, with the sliding arm slidingly connected relative to the connecting member. Since the rotation centers of the rotating arm and the sliding arm are not concentric, when they rotate simultaneously, the connecting member slides relative to the sliding arm while rotating, and the rotation angle of the rotating arm is greater than that of the sliding arm, preventing the screen from being squeezed or stretched during bending and maintaining its flatness. Second, the synchronous transmission structure ensures that the two sets of sliding arms can rotate synchronously around their corresponding rotation axes, guaranteeing coordination between the two sliding arms during movement and avoiding screen deformation due to asynchrony. Finally, the torque control structure is installed on the rotation axis and works in conjunction with the sliding arms to ensure that the opening and closing process states required by the customer are achieved under different operating conditions (such as stopping at any angle, semi-automatic opening and closing, etc.), further ensuring the stability and safety of the screen.

[0016] In another aspect, the present invention provides a foldable hinge module for an inwardly folding flexible screen device terminal, comprising three sets of foldable hinges for the inwardly folding flexible screen device terminal, two floating plates, and two support plates. The two support plates are connected to the base of the three sets of foldable hinges. The two floating plates are respectively connected to the connecting members on both sides of the base. When the two connecting members are in the flattened position, the two floating plates and the two support plates are coplanar.

[0017] It is understood that the foldable hinge module of the inward-folding flexible screen device terminal of this utility model has the same beneficial effects as the foldable hinge of the inward-folding flexible screen device terminal, and will not be described in detail here. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A three-dimensional structural diagram of an inwardly folding flexible screen device terminal with its foldable hinge in a flattened position, provided for an embodiment of this utility model; Figure 2 A three-dimensional structural diagram of a flexible screen device terminal with its foldable hinge in the folded position, provided for an embodiment of this utility model; Figure 3 An exploded view of a foldable hinge for an inwardly folding flexible screen device terminal provided for an embodiment of this utility model; Figure 4 A three-dimensional structural diagram of the limiting sleeve provided in an embodiment of this utility model; Figure 5 Provided for the embodiments of this utility model Figure 2 Top view of the structure; Figure 6 Provided for the embodiments of this utility model Figure 5 A cross-sectional view along the AA direction; Figure 7 Provided for the embodiments of this utility model Figure 5 Cross-sectional view along the BB direction; Figure 8 Provided for the embodiments of this utility model Figure 1 Top view of the structure; Figure 9 Provided for the embodiments of this utility model Figure 8 A cross-sectional view along the AA direction; Figure 10 Provided for the embodiments of this utility model Figure 8 Cross-sectional view along the BB direction; Figure 11 A top view of a foldable hinge module of an inwardly folding flexible screen device terminal in a flattened position, provided for an embodiment of this utility model; Figure 12 A cross-sectional view of a foldable hinge module of an inwardly folding flexible screen device terminal in the folded position, provided for an embodiment of this utility model; Figure 13 A schematic diagram of the structure of the floating plate provided in the embodiment of this utility model; Figure 14 A schematic diagram of the structure of the support plate provided in an embodiment of this utility model.

[0019] In the diagram: 1. Base; 11. Arc-shaped groove; 12. Base hole; 2. Connector; 21. Connecting hole one; 3. Rotating arm; 31. Arc-shaped connecting part; 32. Connecting hole two; 4. Sliding arm; 41. Gear arm; 411. External gear; 42. Gear arm disassembly; 43. Limiting part; 44. First cam; 5. Rotating shaft; 51. Slot; 6. Teardrop-shaped space; 7. Limiting sleeve; 71. Spacer; 711. Limiting surface one; 712. Limiting surface two; 81. Second cam; 82. Elastic component one; 83. Bushing; 91. Small gear; 911. Extension shaft; 92. Elastic component two; 93. Snap ring; 10. Connecting shaft; 101. Floating plate; 1011. Through hole; 1012. Limiting groove; 102. Support plate; 103. Fastener; 104. Limiting hole. Detailed Implementation

[0020] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0021] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0022] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] Example 1, combined with Figure 1 As shown, this embodiment provides a foldable hinge for an inwardly folding flexible screen device terminal, including a base 1 and two connectors 2 that are spaced apart in the second axis Y direction.

[0025] Specifically, the inward-folding flexible screen device terminal can be a mobile phone, computer, PAD, vehicle display system, wearable device, etc.

[0026] The base 1 is rotatably connected to a connector 2 on both sides parallel to the first axis X via rotating arms 3, and slidably connected to a connector 2 on both sides parallel to the first axis X via a set of sliding arms 4. The two sets of sliding arms 4 are respectively sleeved on a rotating shaft 5 connected to the base 1 along the first axis X, and rotate around the corresponding rotating shaft 5 via a synchronous transmission structure. A torque control structure that cooperates with the sliding arms 4 is sleeved on the rotating shaft 5.

[0027] It is understandable that when any connector 2 rotates, one end of it drives a corresponding rotating arm 3 to rotate around the base 1 on one side parallel to the first axis X, while the other end of it drives a set of corresponding sliding arms 4 to rotate around the rotating shaft 5 connected to the base 1.

[0028] Understandably, the base 1 provides support and connection for the entire hinge, ensuring the screen can be stably folded and unfolded. Connectors 2 are spaced apart along the second axis (Y-axis) and connected to the base 1 via rotating arms 3, allowing them to rotate freely within a certain range, thus enabling the screen's folding function. Sliding arms 4 are connected to the base 1 on both sides parallel to the first axis (X-axis), providing additional degrees of freedom of movement and making the screen folding smoother. A torque control structure is mounted on the rotating shaft 5, cooperating with the sliding arms 4 to adjust and control the torque during folding, ensuring the screen's stability and safety during folding and unfolding, while also guaranteeing the device's stability and durability.

[0029] Preferred, combined Figure 2 , Figure 5 , Figure 6 , Figure 7 As shown, the two connecting pieces 2 drive the corresponding rotating arm 3 and sliding arm 4 to move relative to or towards each other, and the rotation angle of the rotating arm 3 is greater than the rotation angle of the sliding arm 4, so that when the two connecting pieces 2 move towards each other to the folded position, they form a teardrop-shaped space 6, ensuring that the screen is not squeezed or suspended.

[0030] It is understandable that, since the rotation centers of the rotating arm 3 and the sliding arm 4 are not concentric, and the rotation angle of the rotating arm 3 is greater than that of the sliding arm 4, when the two connecting parts 2 move relative to each other or towards each other, the connecting parts 2 rotate while sliding relative to each other with the corresponding set of sliding arms 4, ensuring that the screen is not squeezed or stretched.

[0031] Furthermore, since the sliding arm 4 is slidably connected to the connector 2, and the connector 2 is provided with a groove, the other end of the sliding arm 4 is sleeved on the rotating shaft 5, extends into the groove and slides relative to the connector 2. During the hinge folding and bending process, while the connector 2 rotates, the two sets of sliding arms 4 slide out synchronously relative to the two connectors 2, which further avoids the screen being squeezed during the bending process.

[0032] Preferred, combined Figure 3 , Figure 4 As shown, the sliding arm 4 includes a gear arm 41 and a gear arm assembly 42, with a limiting structure between the gear arm 41 and the gear arm assembly 42. The limiting structure includes a limiting sleeve 7 sleeved on the two rotating shafts 5. The limiting sleeve 7 sleeved on both sides of the rotating shaft 5 has a spacer portion 71 extending between the gear arm 41 and the gear arm assembly 42. The spacer portion 71 has a limiting surface 711 and a limiting surface 712 on both sides parallel to the second axis Y direction. The gear arm 41 and the gear arm assembly 42 have limiting portions 43 on their opposite inner sides. The limiting portions 43 rotate around the rotating shaft 5 between the corresponding limiting surface 711 and the limiting surface 712.

[0033] It is understandable that, since the two sets of sliding arms 4 are sleeved on the rotating shaft 5 and rotate relative to the rotating shaft 5, in order to ensure that the folding range of the sliding arms 4 is between the folded position and the flat position during the rotation, corresponding limiting structures need to be set in the folded position and the flat position.

[0034] Furthermore, the sliding arm 4 includes a gear arm 41 and a gear arm component 42. Since the spacer portion 71 of the limiting sleeve 7 extends between the gear arm 41 and the gear arm component 42 on both sides, only one limiting sleeve 7 is needed to achieve the limiting control of the two sets of sliding arms 4 as a whole. The spacer portion 71 is provided with a limiting surface 1 711 and a limiting surface 2 712 on both sides parallel to the second axis Y direction. That is, the spacer portion 71 is provided with four sets of limiting surfaces 1 711 and limiting surfaces 2 712, which correspond to and cooperate with the limiting portions 43 of the two gear arms 41 and the two gear arm components 42, respectively. Among them, the limiting surface 1 711 and the limiting surface 2 712 are perpendicular to the radial plane of the rotation axis 5, so that the limiting portion 43 can abut against the limiting surface 1 711 or the limiting surface 2 712 during the rotation of the gear arm 41 and the gear arm component 42 around the rotation axis 5, thereby achieving the limiting control.

[0035] Understandably, the sliding arm 4, through the cooperation of the gear arm 41 and the gear arm disassembly 42, utilizes a limiting structure to ensure stable operation within a specific angle range. The limiting structure, through the design of the limiting sleeve 7 and the limiting surface, restricts the range of motion of the gear arm 41 and the gear arm disassembly 42, effectively preventing excessive rotation or disengagement of the gear arm 41 and the gear arm disassembly 42 during use, thus improving the safety and reliability of the foldable hinge.

[0036] Preferred, combined Figure 3 , Figure 1 As shown, the torque control structure includes a first cam 44 sleeved on the two rotating shafts 5 and located on both sides of the two sets of sliding arms 4, a second cam 81 disposed on both sides of the two sets of sliding arms 4 parallel to the second axis Y direction and cooperating with the first cam 44, and an elastic member 82 sleeved on the other end of the two rotating shafts 5 connected to the base 1, and the two ends of the elastic member 82 respectively abut against a second cam 81 and a bushing 83 sleeved on one end of the rotating shaft 5.

[0037] It is understood that the two first cams 44 are located on the opposite outer sides of the two sets of sliding arms 4, and cooperate with the first cams 44 on both sides of the two sets of sliding arms 4 parallel to the second axis Y direction. Due to the provision of elastic member 82 (e.g., spring), adjacent sets of first cams 44 and second cams 81 are pressed together under the action of elastic member 82. When the second cam 81 follows the sliding arm 4 to rotate around the rotation axis 5, the second cam 81 rotates relative to the first cam 44. With the cooperation of different curved surface structures, damping force is generated to realize the opening and closing process state required by the customer (such as stopping at any angle, semi-automatic opening and closing, etc.). Specifically, the hinge in this embodiment includes 4 sets of cam contact surfaces that can generate frictional resistance.

[0038] Preferably, the synchronous transmission structure includes at least two meshing pinions 91 and an external gear 411 disposed on at least part of the outer wall of the sliding arm 4 and sleeved on the rotating shaft 5. The external gear 411 meshes with an adjacent pinion 91. One end of the pinion 91 passes through a second cam 81 away from the base 1 via an extension shaft 911 and abuts against a bushing 83. An elastic member 92 is sleeved on one end of the extension shaft 911 passing through the second cam 81. The other end of the pinion 91 is engaged with a limiting sleeve 7 via a snap-fit ​​portion.

[0039] Specifically, the external gear 411 is located on the outer wall of the gear arm 41 sleeved on the transmission shaft in the sliding arm 4, and two meshing pinions 91 are located on the inner side of the two rotating shafts 5. Thus, the synchronous movement of the gear arms 41 on both sides is achieved through gear meshing, ensuring the synchronous movement of the structure on both sides of the hinge during the folding process.

[0040] Understandably, one end of the pinion 91 passes through the second cam 81 via the extension shaft 911 and abuts against the bushing 83, while the other end engages with the limiting sleeve 7 via a snap-fit ​​part, ensuring the stability and reliability of the pinion 91 during movement. The external gear 411 transmits power from the sliding arm 4 to the pinion 91, thereby achieving synchronous movement of the entire synchronous transmission structure. The elastic member 92 is used to absorb and mitigate impacts and vibrations during transmission, improving the smoothness and lifespan of the foldable hinge, and reducing noise and wear during transmission.

[0041] Preferably, a retaining ring 93 is provided between one end of the two rotating shafts 5 that extends into the base 1 and an adjacent second cam 81, and the retaining ring 93 is sleeved on the retaining groove 51 of the rotating shaft 5.

[0042] Understandably, when the rotating shaft 5 is inserted into the base 1, the snap ring 93 is embedded in the snap groove 51, preventing the rotating shaft 5 from moving axially. This not only improves the stability of the rotating shaft 5, but also simplifies the assembly process.

[0043] Preferably, one end of the rotating arm 3 extends into the connector 2 and is connected to the connector 2 via the connecting shaft 10, while the other end of the rotating arm 3 extends into the arc groove 1111 of the connector 2 via the arc-shaped connecting part 31 and is rotatably connected to the connector 2.

[0044] Specifically, combined Figures 5 to 7 and Figures 8 to 10 As shown, the arc-shaped connecting arm slides in the arc-shaped groove 1111 as the rotating arm 3 rotates. When the two connecting parts 2 are in the flat position, the arc-shaped connecting parts 31 of the two rotating arms 3 are completely in the arc-shaped groove 1111. When the two connecting parts 2 are in the folded position, at least part of the arc-shaped connecting parts 31 of the two rotating arms 3 are in the arc-shaped groove 1111, while making an acute angle between the two rotating arms 3, thereby forming a teardrop-shaped space 6 to prevent the screen from being squeezed.

[0045] Understandably, the arc-shaped groove 1111 works in conjunction with the arc-shaped connecting part 31 to provide a guiding path, allowing the rotating arm 3 to rotate within a limited range while maintaining the stability of the connection.

[0046] Specifically, combined Figure 3 As shown, the other end of the connector 2 with the sliding groove is provided with a connecting hole 21 for the connecting shaft 10 to pass through, and the other end of the rotating arm 3 connected to the base 1 is provided with a connecting hole 32 for the connecting shaft 10 to pass through. The axes of the connecting hole 21 and the connecting hole are aligned, and the connecting shaft 10 is inserted into the connecting hole 21 and the connecting hole 32 to achieve the connection between the connector 2 and the rotating arm 3.

[0047] Specifically, the assembly method of the foldable hinge of an inwardly folding flexible screen device terminal in this embodiment includes the following steps: S1. Insert one end of each of the two rotating shafts 5 into the bushing 83, and insert an elastic member 82 into each of the two rotating shafts 5. S2. Insert the extension shafts 911 of the two small gears 91 into a second cam 81, and insert an elastic member 92 into each end of the two extension shafts 911 that passes through the second cam 81. S3. Insert the entire assembly of step S2 into the rotating shaft 5 of step S1 through the second cam 81, so that one end of the elastic member 82 abuts against the bushing 83 and the other end abuts against the second cam 81. S4. Based on step S3, insert the two gear arms 41, the limiting sleeve 7, the two gear arm disassembly parts 42, and the second cam 81 into the rotating shaft 5 in sequence, and finally insert the snap ring 93 into the slot 51 of the rotating shaft 5. S5. Slide the arc-shaped connecting parts 31 of the two rotating arms 3 into the arc-shaped grooves 1111 on both sides of the base 1, and insert the component of step S4 through the rotating shaft 5 into the base hole 12 of the base 1. S6. Pass the two connectors 2 to the other end of the gear arm 41 and gear arm disassembly 42 connected to the rotating shaft 5, so that the axes of the first connecting hole 21 of the connector 2 and the second connecting hole 32 of the rotating arm 3 coincide. Then, insert the connecting shaft 10 into the first connecting hole 21 and the second connecting hole 32 on both sides to complete the assembly.

[0048] Example 2, see Figures 11 to 14 As shown, in another aspect, the foldable hinge module of the inward folding flexible screen device terminal of this utility model includes three sets of foldable hinges for the inward folding flexible screen device terminal, two floating plates 101, and two support plates 102. The two support plates 102 are connected to the base 1 of the three sets of foldable hinges. The two floating plates 101 are respectively connected to the connecting parts 2 on both sides of the base 1. When the two connecting parts 2 are in the flat position, the two floating plates 101 and the two support plates 102 are coplanar.

[0049] Specifically, three sets of foldable hinges are arranged in a straight line. The base 1 and the limiting sleeve 7 are provided with limiting holes 104. Fasteners 103 connect the two support plates 102 to the limiting holes 104 of the base 1 and the limiting sleeve 7. The two support plates 102 are located inside the two connecting pieces 2 when they are in the folded position. Two floating plates 101 are respectively connected to the three sets of connecting pieces 2 on both sides parallel to the first axis X direction. At least a portion of the sliding arm 4 is connected to the rotating shaft 5, and at least a portion of the connecting hole 1 21 and the connecting hole 2 32 are engaged with the through holes 1011 or limiting grooves 1012 opened at corresponding positions on the floating plate 101. At least a portion of the sliding arm 4 is connected to the rotating shaft 5, and at least a portion of the connecting hole 1 21 and the connecting hole 2 32 do not protrude from the other side of the floating plate 101 relative to the connecting piece 2. This ensures that when the foldable hinge module is in the flattened position, the floating plate 101 and the support plate 102 are coplanar, providing a horizontal support surface for the screen.

[0050] It will be understood by those skilled in the art that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A foldable hinge of an inner folding flexible screen device terminal, comprising a base (1) and two connecting pieces (2) which are spaced apart in the direction of the second axis (Y), characterized in that: The base (1) is rotatably connected to a connector (2) on both sides parallel to the first axis (X) via rotating arms (3), and the base (1) is slidably connected to a connector (2) on both sides parallel to the first axis (X) via a set of sliding arms (4); the two sets of sliding arms (4) are respectively sleeved on a rotating shaft (5) connected to the base (1) along the first axis (X), and rotate around the corresponding rotating shaft (5) through a synchronous transmission structure, and a torque control structure that cooperates with the sliding arms (4) is sleeved on the rotating shaft (5).

2. The foldable hinge of an inner folding flexible screen device terminal according to claim 1, wherein, The two connecting pieces (2) drive the corresponding rotating arm (3) and sliding arm (4) to move relative to or towards each other, and the rotation angle of the rotating arm (3) is greater than the rotation angle of the sliding arm (4), so that the two connecting pieces (2) form a teardrop-shaped space (6) when they move towards each other to the folded position.

3. The foldable hinge of an inner folding flexible screen device terminal according to claim 1, wherein, The sliding arm (4) includes a gear arm (41) and a gear arm disassembly (42), and a limit structure is provided between the gear arm (41) and the gear arm disassembly (42).

4. The foldable hinge of an inwardly folding flexible screen device terminal according to claim 3, characterized in that, The limiting structure includes a limiting sleeve (7) sleeved on the two rotating shafts (5). The limiting sleeve (7) sleeved on both sides of the rotating shaft (5) has a spacer (71) extending between the gear arm (41) and the gear arm assembly (42). The spacer (71) is provided with a limiting surface one (711) and a limiting surface two (712) on both sides parallel to the second axis (Y). The gear arm (41) and the gear arm assembly (42) are provided with limiting parts (43) on their opposite inner sides. The limiting parts (43) rotate around the rotating shaft (5) between the corresponding limiting surface one (711) and limiting surface two (712).

5. The foldable hinge of claim 4, wherein, The torque control structure includes a first cam (44) sleeved on the two rotating shafts (5) and located on both sides of the two sets of sliding arms (4), a second cam (81) disposed on both sides of the two sets of sliding arms (4) parallel to the second axis (Y) and cooperating with the first cam (44), and an elastic member (82) sleeved on the other end of the connection between the two rotating shafts (5) and the base (1), and the two ends of the elastic member (82) respectively abut against a second cam (81) and a bushing (83) sleeved on one end of the rotating shaft (5).

6. The foldable hinge of claim 5, wherein, The synchronous transmission structure includes at least two meshing pinions (91) and an external gear disposed on at least part of the outer wall of the sliding arm (4) sleeved on the rotating shaft (5), the external gear meshing with an adjacent pinion (91).

7. The foldable hinge of claim 6, wherein, One end of the pinion (91) passes through an extension shaft (911) through a second cam (81) away from the base (1) and abuts against the bushing (83). One end of the extension shaft (911) passing through the second cam (81) is fitted with an elastic member (92). The other end of the pinion (91) is engaged with the limiting sleeve (7) through a snap-fit ​​part.

8. The foldable hinge of claim 5, wherein, A retaining ring (93) is provided between one end of the two rotating shafts (5) that extends into the base (1) and an adjacent second cam (81), and the retaining ring (93) is sleeved on the retaining groove (51) of the rotating shaft (5).

9. The foldable hinge of an inner folding flexible screen device terminal according to claim 1, wherein, One end of the rotating arm (3) extends into the connector (2) and is connected to the connector (2) via the connecting shaft (10). The other end of the rotating arm (3) extends into the arc groove (11) of the connector (2) via the arc connecting part (31) and is rotatably connected to the connector (2).

10. A foldable hinge module of an in-fold flexible screen device terminal, characterized in that, The device includes three sets of foldable hinges for an inwardly folding flexible screen device terminal as described in any one of claims 1-9, two floating plates (101), and two support plates (102). The two support plates (102) are connected to the base (1) of the three sets of foldable hinges. The two floating plates (101) are respectively connected to the connecting members (2) on both sides of the base (1). When the two connecting members (2) are in the flattened position, the two floating plates (101) and the two support plates (102) are coplanar.

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