A rotating shaft mechanism and a folding screen terminal

Abstract

A pivot mechanism (22) includes a central beam (400), a first swing arm (140), a connecting block (300), and a door panel (200). One end of the first swing arm is rotatably connected to the central beam, and the other end of the first swing arm is slidably connected to the connecting block. The door panel is connected to the first swing arm. The first swing arm can rotate relative to the central beam between an unfolded state and a folded state. During the rotation between the unfolded and folded states, the first swing arm can push the door panel to slide along a direction parallel to the connecting block toward the surface of the door panel. This is intended to solve the problem that the pivot mechanism of a foldable screen terminal provides poor support for the foldable screen, affecting the user experience. A foldable screen terminal (01) is also involved.

Description

A hinge mechanism and a foldable screen terminal Technical Field

[0001] This application relates to the field of electronic device technology, and in particular to a hinge mechanism and a foldable screen terminal. Background Technology

[0002] Foldable screen devices are gaining popularity due to their large-screen display capabilities. These devices utilize an internal hinge mechanism to fold or unfold. However, existing hinge mechanisms in foldable screen devices offer poor support for the folded screen, negatively impacting the user experience.

[0003] Summary of the Invention

[0004] This application provides a hinge mechanism and a foldable screen terminal to solve the problem that the hinge mechanism of the foldable screen terminal has poor support effect on the foldable screen, which affects the user experience.

[0005] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0006] In a first aspect, a pivot mechanism is provided, comprising a base, a first swing arm, a connecting block, and a door panel. A first end of the first swing arm is rotatably connected to the base, and a second end of the first swing arm is slidably connected to the door panel. The door panel is connected to the connecting block, and the surface of the connecting block facing the door panel is a first surface. One of the door panel and the connecting block is provided with a first sliding member, and the other of the door panel and the connecting block is provided with a straight sliding groove. During the rotation of the first swing arm relative to the base, the first swing arm drives the door panel to rotate, and the first sliding member slides in conjunction with the straight sliding groove, causing the door panel to slide in a direction parallel to the first surface.

[0007] The pivot mechanism provided in the first aspect of this application can drive the door panel to rotate during the rotation of the first swing arm, causing the door panel to slide in a direction parallel to the surface of the connecting block facing the door panel (i.e., the first surface), thereby adjusting the relative position between the door panel and the connecting block. That is, during the rotation of the first swing arm, the relative position between the door panel and the base is adjusted by sliding the door panel relative to the connecting block. Furthermore, the straight slide groove and the first sliding member are slidably engaged to restrict the door panel from sliding in a straight line parallel to the first surface, meaning the door panel can slide relative to the connecting block in a direction away from or towards the central axis of the base.

[0008] For example, the first swing arm is rotatable relative to the base between a folded state and an unfolded state. During the rotation from the unfolded state to the folded state, the first swing arm pushes the door panel to slide away from the base relative to the connecting block, i.e., slides along the direction from the base to the connecting block. During the rotation from the folded state to the unfolded state, the first swing arm pushes the door panel to slide closer to the base relative to the connecting block, i.e., slides along the direction from the connecting block to the base.

[0009] In this way, as the first swing arm rotates from the folded state to the unfolded state, it can push the door panel to move closer to the base, which helps to reduce the gap between the two door panels on both sides of the base. That is, when the pivot mechanism rotates to the unfolded state, the two door panels can provide better support for the folding screen, reducing the risk of dented areas appearing on the folding screen when the folding screen terminal is in the unfolded state, thus improving the user experience.

[0010] In one possible implementation of the first aspect of this application, a first swing arm, a connecting block, and a door panel are provided on opposite sides of the base, with the first swing arms on both sides rotating in opposite directions. The first swing arms can rotate relative to the base between a folded state and an unfolded state. When the first swing arm is in the folded state, the two door panels are positioned opposite each other and spaced apart along the width direction of the base; when the first swing arm is in the unfolded state, the two door panels are on the same plane and cover the base. In this structure, the two door panels support the central area of ​​the foldable screen, thereby creating a larger support plane and improving the support effect on the foldable screen.

[0011] Furthermore, since the door panel can slide relative to the connecting block in a direction parallel to the first surface, the relative position between the door panel and the base can be adjusted during the rotation of the first swing arm, thereby reducing the risk of the door panel and the base coming into contact and improving the reliability of the pivot mechanism.

[0012] Furthermore, during the rotation of the pivot mechanism, the door panel slides in a direction parallel to the first surface, enabling mutual avoidance between the door panel and the base. Therefore, there is no need to provide an avoidance space on the base, which helps to improve the strength of the base. Alternatively, it is not necessary to increase the distance between the base and the door panel when the first swing arm is in the extended state to provide an avoidance space between them, thereby helping to reduce the thickness of the pivot mechanism and contributing to the thinner and lighter design of electronic devices.

[0013] In one possible implementation of the first aspect of this application, the direction of movement of the door panel is perpendicular to the rotation axis of the first swing arm. With this structure, the door panel can only move along the width direction of the pivot mechanism, avoiding displacement of the door panel along the length direction of the pivot mechanism. Therefore, there is no need to reserve clearance space for the door panel along the length direction, which helps to save space along the length direction.

[0014] In one possible implementation of the first aspect of this application, the first sliding member includes a connecting portion and a limiting portion. One end of the connecting portion is fixedly connected to a door panel or connecting block, and the limiting portion is fixed to the side wall of the other end of the connecting portion. The straight sliding groove has two inner walls distributed along the thickness direction of the door panel or connecting block, and the limiting portion is located between the two inner walls of the sliding groove. In this structure, the limiting portion is located between the two inner walls of the sliding groove distributed along the thickness direction of the door panel or connecting block, which can form a limiting position along the thickness direction of the rotating shaft mechanism between the door panel and the connecting block, thereby reducing the risk of mutual force component between the door panel and the connecting block along the thickness direction, and thus further improving the structural reliability.

[0015] In one possible implementation of the first aspect of this application, straight sliding grooves are formed at both ends of the connecting block along its length. The first sliding member is correspondingly provided on the door panel. In this structure, since the thickness of the door panel is less than the thickness of the connecting block, forming straight sliding grooves on the connecting block is less technically challenging and helps to improve the limiting effect between the door panel and the connecting block.

[0016] In one possible implementation of the first aspect of this application, along the thickness direction of the connecting block, the wall panels on both sides of the straight slide groove are a first wall panel and a second wall panel, with the first wall panel located between the limiting part and the door panel. Along the direction parallel to the rotation axis of the first swing arm, the length of the first wall panel is smaller than the length of the second wall panel. This reduces the width of the first sliding member protruding from the edge of the connecting block along the length direction of the rotating shaft mechanism, i.e., parallel to the rotation axis of the first swing arm, thereby saving space along the length direction of the rotating shaft mechanism.

[0017] In one possible implementation of the first aspect of this application, the length of the first sliding member is less than or equal to the length of the second wall plate along a direction parallel to the rotation axis of the first swing arm. This structure prevents the first sliding member from protruding beyond the edge of the connecting block, thereby further saving space.

[0018] In one possible implementation of the first aspect of this application, multiple sets of first sliding members and straight sliding grooves are provided between the connecting block and the door panel, and these multiple sets of first sliding members and straight sliding grooves are spaced apart along a direction parallel to the rotation axis of the first swing arm. This improves the limiting effect between the door panel and the connecting block, reducing the risk of jamming during relative movement between the door panel and the connecting block.

[0019] For example, straight sliding grooves can be formed on both side walls of the connecting block along a direction parallel to the rotation axis of the first swing arm. Two first sliding members are correspondingly provided on the door panel, with the limiting part of the first sliding member extending into the corresponding straight sliding groove. In this structure, both ends of the connecting block along the length direction form a sliding connection with the door panel, which is beneficial for force balance and can improve the reliability of the door panel sliding relative to the connecting block.

[0020] In one possible implementation of the first aspect of this application, multiple connecting blocks are respectively provided on opposite sides of the base, and at least one of the multiple connecting blocks located on the same side of the base is provided with a first sliding member and a straight sliding groove between itself and the corresponding door panel. With this structure, the direction of movement of the door panel can be limited by at least one set of sliding structures.

[0021] In one possible implementation of the first aspect of this application, multiple connecting blocks on the same side of the base are spaced apart along a direction parallel to the rotation axis of the first swing arm; along the direction parallel to the rotation axis of the first swing arm, a first sliding member and a straight sliding groove are provided between the two connecting blocks at both ends and the corresponding door panels. This structure ensures that both ends of the door panel along its length have sliding pairs, which is beneficial for the force balance of the door panel and guarantees the reliability of the door panel sliding.

[0022] In one possible implementation of the first aspect of this application, the pivot mechanism further includes a higher pair mechanism, through which the first swing arm and the door panel are slidably connected; during the rotation of the first swing arm between the unfolded and folded states, the first swing arm pushes the door panel to slide in a direction parallel to the first surface via the higher pair mechanism. In this structure, because the higher pair mechanism has advantages such as a large transmission ratio and high transmission efficiency, it can provide the driving force for driving the door panel's movement, thus making the door panel's movement more efficient and improving the overall structural reliability.

[0023] In one possible implementation of the first aspect of this application, the higher pair mechanism includes a second sliding member and a sliding groove. One of the second sliding member and the sliding groove is disposed on a first rocker arm, and the other is disposed on a door panel. The second sliding member extends into the sliding groove. During the rotation of the first rocker arm, the second sliding member slides along the extending direction of the sliding groove and pushes the door panel to move relative to the connecting block. In this way, based on the mutual abutment between the second sliding member and the sidewall of the sliding groove to form a higher pair, when the second sliding member slides along the sidewall of the sliding groove, it can apply a thrust to the sidewall of the sliding groove, thereby pushing the door panel to move.

[0024] In one possible implementation of the first aspect of this application, the sliding groove extends along a first direction, which is parallel to the first surface and intersects the rotation axis of the first swing arm. With this structure, when the second sliding member moves relative to the sliding groove, at least one component force can be generated, either approaching or moving away from the base, to push the door panel along that direction.

[0025] In one possible implementation of the first aspect of this application, during the rotation of the first swing arm in both the unfolded and folded states, the first swing arm slides relative to the connecting block along its rotation axis, and pushes the plate to slide relative to the connecting block. In this structure, the relative motion between the second sliding member and the sliding groove is decomposed into two directions: one parallel to the rotation axis of the first swing arm, and the other perpendicular to the rotation axis of the first swing arm.

[0026] Therefore, during the movement of the second slider relative to the sliding groove, the first swing arm can move along its rotation axis. At the same time, based on the above-mentioned higher pair mechanism, it can push the door panel to move in a direction perpendicular to the rotation axis of the first swing arm, that is, to move closer to or away from the base.

[0027] In one possible implementation of the first aspect of this application, the end of the first swing arm furthest from the door panel is rotatably connected to the base. The first swing arm has a first mating surface, and the base has a second mating surface. At least one of the first and second mating surfaces extends spirally around the rotation axis of the first swing arm, and the first and second mating surfaces engage with each other. In this structure, the first swing arm can also move along its rotation axis when rotated, thanks to the first and second mating surfaces.

[0028] In one possible implementation of the first aspect of this application, an arc-shaped groove is provided on the base, and the first end of the first swing arm extends into the arc-shaped groove; along the direction parallel to the rotation axis of the first swing arm, the two end faces of the end of the first swing arm extending into the arc-shaped groove are the first mating surfaces, and the two end faces of the arc-shaped groove are the second mating surfaces.

[0029] In one possible implementation of the first aspect of this application, a third sliding groove is formed on the side wall of the connecting block facing the base, and the end of the first swing arm away from the base extends into the third sliding groove. In this structure, a sliding connection is formed between the third swing arm and the connecting block, which is beneficial for improving the compactness of the overall structure and for miniaturizing the rotating shaft mechanism.

[0030] In one possible implementation of the first aspect of this application, a notch is provided on the surface of the connecting block facing the door panel, the notch communicating with a third sliding groove, and the second sliding member is located within the notch. This structure helps to further save space and improve the overall compactness of the structure.

[0031] In one possible implementation of the first aspect of this application, the rotating shaft mechanism further includes a second swing arm, one end of which is rotatably connected to the base, and the other end of which is connected to the connecting block. Exemplarily, the second swing arm can be fixedly connected to the connecting block, meaning the connecting block rotates synchronously with the second swing arm. Alternatively, the second swing arm and the connecting block can also be rotatably connected to adjust the angle between the connecting block and the door panel.

[0032] In one possible implementation of the first aspect of this application, the base has a support surface, and when the first swing arm is in a folded state, the sidewall of the door panel faces the support surface. Exemplarily, the support surface may be formed in a localized area of ​​the base surface away from the axle cover.

[0033] In other possible examples, the base may also include a beam body and a support base, with the support base fixed to the side of the beam body away from the axle cover, and the surface of the support base away from the axle cover forming a support surface. In this structure, the support base forms an independent component from the beam body, which can be machined separately, thus reducing machining difficulty.

[0034] Secondly, a foldable screen terminal is provided, which includes a housing and a hinge mechanism. The hinge mechanism is the hinge mechanism described in any of the above technical solutions, and the housing and the hinge mechanism are fixedly connected by a connecting block.

[0035] The foldable screen terminal provided in the second aspect of this application, because it includes the hinge mechanism described in any of the above technical solutions, can solve the same technical problem and achieve the same technical effect.

[0036] In one possible implementation of the second aspect of this application, the housing includes a first region and a second region, the second region being disposed on the side of the first region away from the base of the pivot mechanism, and the first region being fixedly connected to the connecting block. When the first swing arm is in a folded state, the door panel is supported between the support surface of the pivot mechanism and the second region. With this structure, when the foldable screen terminal is impacted or dropped, the door panel can transfer the impact force from the base side to the housing, thereby dispersing the impact force on the device and reducing the risk of the foldable screen being crushed. Attached Figure Description

[0037] Figure 1 is a structural diagram of a foldable screen terminal provided in an embodiment of this application;

[0038] Figure 2 is a front view of a foldable screen terminal provided in an embodiment of this application;

[0039] Figure 3 is a front view of a foldable screen terminal in a folded state according to an embodiment of this application;

[0040] Figure 4 is a front view of another foldable screen terminal in a folded state provided in an embodiment of this application;

[0041] Figure 5 is a structural diagram of a rotating shaft mechanism provided in an embodiment of this application;

[0042] Figure 6 is a structural diagram of the foldable screen provided in the embodiment of this application in the unfolded state and the folded state;

[0043] Figure 7 is a structural diagram of another rotating shaft mechanism provided in an embodiment of this application;

[0044] Figure 8 is a structural diagram of the door panel, middle beam, and floating plate of the rotating shaft mechanism provided in Figure 7;

[0045] Figure 9 is a cross-sectional view of a support structure in an unfolded state according to an embodiment of this application;

[0046] Figure 10 is a structural diagram of the support structure provided in Figure 9 in a state between unfolded and folded states.

[0047] Figure 11 is a structural diagram of a rotating shaft mechanism in a folded state according to an embodiment of this application;

[0048] Figure 12 is a structural diagram of a rotating shaft mechanism in an unfolded state according to an embodiment of this application;

[0049] Figure 13 is an exploded view of a rotating shaft mechanism provided in an embodiment of this application;

[0050] Figure 14 is a schematic diagram of the motion principle of a rotating shaft mechanism provided in an embodiment of this application;

[0051] Figure 15 is a schematic diagram of the motion principle of another rotating shaft mechanism provided in an embodiment of this application;

[0052] Figure 16 is a schematic diagram of the motion principle of another rotating shaft mechanism provided in an embodiment of this application;

[0053] Figure 17 is a schematic diagram of the motion principle of another rotating shaft mechanism provided in an embodiment of this application;

[0054] Figure 18 is a schematic diagram of the motion principle of another rotating shaft mechanism provided in an embodiment of this application;

[0055] Figure 19 is a partial structural diagram of the sliding groove of the higher pair mechanism provided in the embodiment of this application;

[0056] Figure 20 is a partial structural diagram of the second sliding member of the higher pair mechanism provided in the embodiment of this application;

[0057] Figure 21 is an assembly diagram of the higher pair mechanism provided in an embodiment of this application;

[0058] Figure 22 is a partial cross-sectional view of the higher pair mechanism provided in Figure 21 along the plane parallel to the XY plane;

[0059] Figure 23 is an exploded view of the middle beam and the first swing arm provided in the embodiment of this application;

[0060] Figure 24 is an assembly diagram of the middle beam and the first swing arm provided in Figure 23;

[0061] Figure 25 is an exploded view of another central beam and first swing arm provided in an embodiment of this application;

[0062] Figure 26 is a structural diagram of the first swing arm from another perspective, as shown in Figure 25.

[0063] Figure 27 is a cross-sectional view of the AA section after the middle beam and the first swing arm are assembled as shown in Figure 25;

[0064] Figure 28 is a structural diagram of the rotating shaft mechanism provided in an embodiment of this application, including another connecting block;

[0065] Figure 29 is an exploded view of the rotating shaft mechanism shown in Figure 28;

[0066] Figure 30 is a partial assembly drawing of the rotating shaft mechanism shown in Figure 28;

[0067] Figure 31 is a partial structural diagram of another sliding groove provided in an embodiment of this application;

[0068] Figure 32 is an exploded view of the door panel and connecting block provided in an embodiment of this application;

[0069] Figure 33 is a partial assembly structure diagram of the door panel and connecting block provided in Figure 32;

[0070] Figure 34 is an enlarged view of the structure of region A in Figure 33;

[0071] Figure 35 is a structural diagram of the straight slide groove and the first sliding member provided in an embodiment of this application;

[0072] Figure 36 is a structural diagram of another straight slide groove and a first sliding member provided in an embodiment of this application;

[0073] Figure 37 is a structural diagram of another straight slide groove and a first sliding member provided in an embodiment of this application;

[0074] Figure 38 is a partial structural diagram of a middle beam provided in an embodiment of this application;

[0075] Figure 39 is a partial cross-sectional view of the foldable screen terminal provided in an embodiment of this application.

[0076] Reference numerals: 01-Foldable screen terminal; 10-Foldable screen; 11-First part; 12-Second part; 13-Third part; 20-Support structure; 21-Housing; 21a-First area; 21b-Second area; 22-Rotating mechanism; 100-Swing arm; 110-Main swing arm; 120-Secondary swing arm; 130-Synchronous swing arm; 140-First swing arm; 141-Second sliding member; 142-First mating surface; 143-Groove; 150-Second swing arm; 200-Door panel; 210-First sliding member; 211-Connecting part; 212-Limiting part; 2 20-Sliding groove; 300-Connecting block; 310-Straight sliding groove; 311-First wall plate; 312-Second wall plate; 320-Third sliding groove; 330-Notch; 400-Central beam; 400a-Allowing space; 410-Arc groove; 411-Second mating surface; 420-Supporting surface; 430-Limiting sliding groove; 500-Shaft cover; 600-Floating plate; 610-Allowing opening; 700-High pair mechanism; 710-Rotating pair; 720-Screw pair; 730-Sliding pair; 740-Moving pair; 800-Synchronous slider; 810-Limiting protrusion; 30-Secondary screen. Detailed Implementation

[0077] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0078] Hereinafter, the terms "first," "second," etc., 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 with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0079] Furthermore, in this application, directional terms such as "upper" and "lower" are defined relative to the indicated placement of the components in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the placement of the components in the accompanying drawings.

[0080] In this application, unless otherwise expressly specified and limited, the term "connection" shall be interpreted broadly. For example, "connection" may be a fixed connection, a detachable connection, or an integral part; it may be a direct connection or an indirect connection through an intermediate medium.

[0081] This application provides a foldable screen terminal, which can be an electronic device with a foldable display screen. For example, the foldable screen terminal can be a mobile phone with an inwardly folding screen or a mobile phone with an outwardly folding screen. Therefore, the embodiments of this application do not impose any special limitations on it. In the following embodiments, a mobile phone with an inwardly folding screen is used as an example for description.

[0082] Specifically, please refer to Figures 1 and 2. Figure 1 is a structural diagram of a foldable screen terminal 01 provided in an embodiment of this application, and Figure 2 is a front view of a foldable screen terminal 01 provided in an embodiment of this application. The foldable screen terminal 01 may include a foldable screen 10 and a support structure 20. The foldable screen 10 is supported and attached to the support structure 20. The support structure 20 can drive the foldable screen 10 to unfold or fold, so that the foldable screen terminal 01 can rotate between the unfolded state and the folded state.

[0083] It is understood that Figures 1 and 2 only schematically show some components of the foldable screen terminal 01, and the actual shape, size, position and structure of these components are not limited by the structures shown in Figures 1 and 2.

[0084] For ease of description in the following embodiments, an XYZ coordinate system is established. When the foldable screen terminal 01 is in an unfolded or folded state, the width direction of the foldable screen terminal 01 is defined as the X-axis, the length direction as the Y-axis, and the thickness direction as the Z-axis. It should be noted that this XYZ coordinate system can be flexibly transformed according to actual needs. The embodiments in this application only provide one possible example and should not be considered as constituting a special limitation on this application.

[0085] The aforementioned foldable screen 10 is used to display images, videos, etc. The foldable screen 10 may include a first part 11, a second part 12, and a third part 13, with the third part 13 disposed between the first part 11 and the second part 12. When the foldable screen terminal 01 is in a folded state, the third part 13 of the foldable screen 10 is bent, and the first part 11 and the second part 12 are positioned opposite each other. At least the third part 13 of the foldable screen 10 is a flexible screen. The first part 11 and the second part 12 of the foldable screen 10 may be flexible screens, or they may be non-flexible screens, or they may be partially flexible and partially non-flexible screens. Therefore, this application does not impose specific limitations in this regard.

[0086] Among them, the aforementioned foldable screen 10 can be an organic light-emitting diode (OLED) display, an active-matrix organic light-emitting diode (AMOLED) display, a mini organic light-emitting diode (MLED) display, a micro organic light-emitting diode (MOLED) display, a quantum dot light-emitting diode (QLED) display, a liquid crystal display (LCD), etc.

[0087] The aforementioned support structure 20 is used to support the foldable screen 10. This support structure 20 may include a housing 21 and a pivot mechanism 22. Two housings 21 are provided, and the pivot mechanism 22 connects the two housings 21. The first part 11 and the second part 12 of the foldable screen 10 are respectively supported and attached to the two housings 21. The third part 13 of the foldable screen 10 is supported and attached to the pivot mechanism 22. The two housings 21 are rotatably connected through a rotating mechanism, thereby enabling the foldable screen terminal 01 to rotate between the unfolded state and the folded state.

[0088] With the foldable screen terminal 01 in its unfolded state, please refer to Figures 1 and 2, which show the structural diagrams of the foldable screen terminal 01 in its unfolded state. At this time, the aforementioned foldable screen 10 is fully unfolded, meaning that the first part 11, the second part 12, and the third part 13 of the foldable screen 10 are on the same plane, ensuring the flatness of the foldable screen 10. In this state, the foldable screen terminal 01 can achieve a large-screen display, providing a better user experience. For example, when watching a movie, the user can use a large screen to watch, which enhances the viewing experience.

[0089] With the foldable screen terminal 01 in a folded state, please refer to Figure 3, which is a front view of a foldable screen terminal 01 in a folded state according to an embodiment of this application. At this time, the first part 11 and the second part 12 of the foldable screen 10 are opposite each other, the third part 13 is bent, and the support structure 20 protects the foldable screen 10 from the outside, that is, the foldable screen 10 is located between the two shells 21 of the support structure 20. In this state, the foldable screen 10 is not visible to the user, to prevent the foldable screen 10 from being scratched or damaged, thereby providing effective protection for the foldable screen 10. For example, when the phone is not needed, the foldable screen terminal 01 can be rotated to a folded state to avoid damage to the foldable screen 10.

[0090] In some embodiments, please refer to FIG4, which is a front view of another foldable screen terminal 01 in a folded state according to an embodiment of this application. The foldable screen terminal 01 may further include a secondary screen 30 (also referred to as an outer screen), which is disposed on the side of any housing 21 away from the foldable screen 10. When the foldable screen terminal 01 is in a folded state, the secondary screen 30 can be used to display images, allowing users to operate with one hand, thereby diversifying the usage scenarios of the foldable screen terminal 01. For example, when a user is riding public transportation, one hand needs to hold the handrail; in this case, the secondary screen 30 can be used to display images, reducing the size of the foldable screen terminal 01, facilitating one-handed operation, and further improving the user experience.

[0091] Based on this, please refer to Figure 5, which is a structural diagram of a pivot mechanism 22 provided in an embodiment of this application. The pivot mechanism 22 is in the folded state described above. The pivot mechanism 22 may include a swing arm 100, a door panel 200, a connecting block 300, a middle beam 400, and a shaft cover 500. Among them, the middle beam 400 and the shaft cover 500 can serve as the base of the pivot mechanism 22.

[0092] The central beam 400 is located inside the shaft cover 500, which is located between the two housings 21. When the foldable screen terminal 01 is in the folded state, the outer surface of the shaft cover 500 (i.e., the surface away from the central beam 400) is exposed, meaning the shaft cover 500 is an exterior component.

[0093] The central beam 400 has swing arms 100 and door panels 200 on both sides along its length (i.e., the Y-axis direction mentioned above). The first end of the swing arm 100 is rotatably connected to the central beam 400. The swing arms 100 on both sides of the central beam 400 rotate in opposite directions, and their rotation axes are parallel to the Y-axis direction. The second end of the swing arm 100 (i.e., the end away from the central beam 400) is connected to a connecting block 300, which is connected to the door panel 200. The connecting blocks 300 on both sides of the central beam 400 are fixedly connected to the two housings 21 shown in Figures 3 and 4, respectively, thereby enabling the two housings 21 to rotate synchronously with the swing arms 100.

[0094] In some embodiments, referring to Figure 5, multiple swing arms 100 can be provided, that is, multiple swing arms 100 are provided on both sides of the middle beam 400, and the multiple swing arms 100 are spaced apart along the Y-axis. Furthermore, the multiple swing arms 100 can be used to perform different functions. For example, the multiple swing arms 100 may include a main swing arm 110, a secondary swing arm 120, and a synchronous swing arm 130, etc.

[0095] The main swing arm 110 can be used to drive the connecting block 300 and door panel 200 to rotate. The auxiliary swing arm 120 can adjust the rotation angle of the door panel 200. The synchronous swing arm 130 can cooperate with the gear set. For example, the synchronous swing arms 130 on both sides of the middle beam 400 can drive the door panels 200 on both sides of the middle beam 400 to rotate synchronously through the meshing of the gear set. In addition, the synchronous swing arm 130 can compress the elastic element (e.g., compression spring) during rotation, thereby providing damping force to the rotating shaft mechanism 22 to improve the rotation feel of the folding screen terminal 01.

[0096] Based on this, the aforementioned swing arm 100 can drive the connecting block 300 and the door panel 200 to rotate between the unfolded and folded states, so that the foldable screen terminal 01 can rotate between the unfolded and folded states. When the foldable screen terminal 01 is in the unfolded state, the two door panels 200 on both sides of the central beam 400 are used to support the third part 13 of the foldable screen 10, so as to ensure that the third part 13 is on the same plane as the first part 11 and the second part 12.

[0097] However, please continue to refer to Figure 5 and in conjunction with Figure 6. Figure 6 is a structural diagram of the foldable screen 10 in the unfolded state and the folded state provided in the embodiment of this application. In Figure 6, the dashed line indicates that the foldable screen 10 is in the unfolded state, and the solid line indicates that the foldable screen 10 is in the folded state.

[0098] Because the rotation axes of the swing arms 100 on both sides of the central beam 400 are different (they are parallel to each other, i.e., both are parallel to the Y-axis), the folding screen 10 has two rotation axes (points A and B as shown in Figure 6). The first part 11 rotates around point A, and the second part 12 rotates around point B. Therefore, when the folding screen 10 rotates from the unfolded state to the folded state, i.e., when the third part 13 is bent, the middle area of ​​the third part 13 will move towards the side closer to the central beam 400, i.e., arch downwards as shown in Figure 6. To avoid the third part 13 from contacting the rotating shaft mechanism 22, some avoidance structures are provided on the rotating shaft mechanism 22.

[0099] In one example, please refer to Figures 7 and 8. Figure 7 is a structural diagram of another pivot mechanism 22 provided in an embodiment of this application, and Figure 8 is a structural diagram of the pivot mechanism 22 provided in Figure 7, including the door panel 200, the middle beam 400, and the floating plate 600. The pivot mechanism 22 also includes a floating plate 600. A clearance space 400a is provided in the middle of the middle beam 400. The floating plate 600 is located on the side of the middle beam 400 away from the shaft cover 500 and is situated within the clearance space 400a. The floating plate 600 is movably connected to the middle beam 400. During the rotation of the swing arm 100 from the unfolded state to the folded state, the floating plate 600 can move towards the middle beam 400, thereby creating clearance between the third part 13 of the folded screen 10 and the floating plate 600 to prevent the third part 13 from contacting the floating plate 600.

[0100] However, when the aforementioned pivot mechanism 22 is in the deployed state, there are gaps between the two sides of the float 600 and the edges of the clearance space 400a of the middle beam 400, and there are also gaps between the middle beam 400 and the door panels 200 on both sides, as shown by the elliptical dashed box in Figure 8. Furthermore, since the float 600 is located within the clearance space 400a on the middle beam 400, in order to avoid the aforementioned multiple swing arms 100, the float 600 also has multiple clearance areas, such as clearance openings 610 opened on the float 600 to avoid the protruding structures on the swing arms 100.

[0101] Therefore, please refer to Figures 7 and 8. When the foldable screen terminal 01 is in the unfolded state, the hinge mechanism 22 provides relatively low support for the third part 13 of the foldable screen 10. At the aforementioned gaps and clearance openings 610, the area corresponding to the third part 13 of the foldable screen 10 cannot be effectively supported, resulting in a noticeable collapse when the user presses this area. Using objects with pointed tips (e.g., a stylus) can easily cause this area to malfunction, damaging the foldable screen 10.

[0102] Furthermore, when the hinge mechanism 22 is in the unfolded state, the door panel 200, a portion of the middle beam 400 (on one side of the clearance space 400a), the floating plate 600, a portion of the middle beam 400 (on the other side of the clearance space 400a), and the door panel 200 are sequentially distributed along the X-axis. The third part 13 of the folding screen 10 is supported by multiple supporting planes. Therefore, due to factors such as assembly errors, there may be height differences (height differences along the Z-axis) between the multiple supporting planes, preventing them from being located in the same plane. This reduces the support effect on the folding screen 10, causing creases to appear on the folding screen 10 and affecting the user experience.

[0103] In another example, please refer to Figures 9 and 10. Figure 9 is a cross-sectional view of a support structure 20 in an unfolded state according to an embodiment of this application, and Figure 10 is a structural view of the support structure 20 in Figure 9 between an unfolded state and a folded state. The door panels 200 of the support structure 20 can be fixedly connected to the swing arm 100, that is, the door panels 200 rotate synchronously with the swing arm 100. When the swing arm 100 is in the unfolded state, the two door panels 200 provide support for the third part 13 of the folded screen 10. During the process of the swing arm 100 rotating from the unfolded state to the folded state, the two door panels 200 rotate synchronously with the swing arm 100.

[0104] In this case, when the door panel 200 rotates around the rotation axis of the swing arm 100, the edge of the door panel 200 may obstruct the middle beam 400, as shown in the area indicated by the circular dashed box in Figure 10.

[0105] Therefore, to prevent conflict, space needs to be reserved on one side of the central beam 400 to allow the door panel 200 to rotate. However, reserving space on one side of the central beam 400 is not conducive to the miniaturization of the foldable screen terminal 01; locally thinning the central beam 400 to create this space would affect its strength. Alternatively, the rotation axis of the swing arm 100 can be moved away from the axle cover 500, i.e., upward in Figure 10, to avoid mutual obstruction. However, moving the rotation axis of the swing arm 100 may cause the foldable screen 10 to arch away from the axle cover 500, resulting in reduced reliability.

[0106] To address the aforementioned technical problems, this application provides another hinge mechanism 22, which can be used in the aforementioned foldable screen terminal 01. Please refer to Figures 11, 12, and 13. Figure 11 is a structural diagram of the hinge mechanism 22 in a folded state according to an embodiment of this application; Figure 12 is a structural diagram of the hinge mechanism 22 in an unfolded state according to an embodiment of this application; and Figure 13 is an exploded view of the hinge mechanism 22 according to an embodiment of this application.

[0107] The rotating shaft mechanism 22 includes a central beam 400, a first swing arm 140, a connecting block 300, a door panel 200, and a second swing arm 150. The central beam 400 is provided with the first swing arm 140, the connecting block 300, the door panel 200, and the second swing arm 150 on both sides along the length direction (i.e., the Y-axis direction).

[0108] When the first swing arm 140 is in the folded state, the two door panels 200 are opposite to each other and spaced apart along the width direction of the middle beam 400. In this state, the third part 13 of the folding screen 10 shown in Figure 6 is located between the two door panels 200, thereby avoiding the third part 13 of the folding screen 10 shown in Figure 6, so as to prevent the door panels 200 from contacting the folding screen 10.

[0109] When the first swing arm 140 is in the unfolded state, the two door panels 200 are on the same plane and can completely cover the middle beam 400, so that the third part 13 of the folding screen 10 is supported only by the support plane formed by the two door panels 200, thereby reducing the number of support planes supporting the third part 13, that is, reducing the number of gaps between two adjacent support planes, which in turn helps to improve the support effect of the third part 13.

[0110] Since the two door panels 200 can cover structural components such as the central beam 400 and the shaft cover 500, they can also cover other structural components installed on the central beam 400. Therefore, there is no need to create a clearance structure (i.e., a clearance opening 610 for clearance of the protruding structure on the aforementioned swing arm 100) on the two door panels 200. This allows the two door panels 200 to form a larger supporting plane for the third part 13 of the folding screen 10, thus avoiding the problem of collapse caused by user pressure and further improving the support effect on the folding screen 10.

[0111] It is understandable that when the first swing arm 140 is in the unfolded state, the two door panels 200 being on the same plane means that the supporting planes on the two door panels 200 that support the folding screen 10 are on the same plane, that is, the surfaces of the two door panels 200 away from the middle beam 400 are on the same plane, thereby ensuring the support effect on the third part 13 of the folding screen 10.

[0112] Furthermore, in the unfolded state, the two door panels 200 can contact or abut against each other to provide better support for the folding screen 10. In some other possible examples, when the hinge mechanism 22 is in the unfolded state, there may also be a certain gap between the two door panels 200 to accommodate assembly errors in the overall structure. Therefore, this application does not impose any special limitations on this.

[0113] Based on this, please continue to refer to Figures 11-13, and in conjunction with Figure 14, which is a schematic diagram of the motion principle of a rotating shaft mechanism 22 provided in an embodiment of this application. The first swing arm 140 of the rotating shaft mechanism 22 is rotatably connected to the middle beam 400. A connecting block 300 is disposed at the end of the first swing arm 140 away from the middle beam 400, and the connecting block 300 can rotate with the first swing arm 140. The door panel 200 is slidably connected to the first swing arm 140. That is, during the rotation of the first swing arm 140 between the unfolded state and the folded state, the connecting block 300 and the door panel 200 can rotate together.

[0114] One end of the second swing arm 150 is rotatably connected to the central beam 400, and the other end of the second swing arm 150 is connected to the connecting block 300, so that the second swing arm 150 can drive the connecting block 300 to rotate relative to the central beam 400. For example, the other end of the second swing arm 150 can be rotatably connected to the connecting block 300, so that during the rotation of the rotating shaft mechanism 22 between the unfolded and folded states, the second swing arm 150 and the connecting block 300 can rotate relative to each other, thereby adjusting the angle of the connecting block 300 and the door panel 200 to avoid obstructing the third part 13 of the folding screen 10.

[0115] Alternatively, please refer to Figure 15, which is a schematic diagram of the motion principle of another rotating shaft mechanism 22 provided in an embodiment of this application. The second swing arm 150 can also be fixedly connected to the connecting block 300 to make the overall structure of the rotating shaft mechanism 22 more compact. In the following embodiments, the fixed connection between the second swing arm 150 and the connecting block 300 is used as an example for description. And the surface of the connecting block 300 facing the door panel 200 is the first surface.

[0116] Based on this, during the rotation of the first swing arm 140 between the unfolded state and the folded state, the first swing arm 140 drives the door panel 200 to rotate and can push the door panel 200 to slide relative to the connecting block 300, so that the door panel 200 slides in a direction parallel to the first surface.

[0117] For example, during the process of the first swing arm 140 rotating from the unfolded state to the folded state, the first swing arm 140 pushes the door panel 200 to move away from the middle beam 400 relative to the connecting block 300. During the process of the first swing arm 140 rotating from the folded state to the unfolded state, the first swing arm 140 pushes the door panel 200 to move closer to the middle beam 400 relative to the connecting block.

[0118] The direction closer to the center beam 400 can be the direction in which the connecting block 300 points to the center beam 400, and the direction farther away from the center beam 400 can be the direction in which the center beam 400 points to the connecting block 300, so that the relative position between the door panel 200 and the center beam 400 can be adjusted during the sliding process.

[0119] For example, the direction of movement of the door panel 200 can be perpendicular to the rotation axis (i.e., the Y-axis direction) of the first swing arm 140. In some other possible examples, the direction of movement of the door panel 200 can also form an acute or obtuse angle with the Y-axis direction. For example, the angle between the direction of movement of the door panel 200 and the Y-axis direction can be any angle between 80° and 100°, etc.

[0120] In this way, during the rotation of the first swing arm 140, the door panel 200 slides relative to the connecting block 300 to adjust the distance between the door panel 200 and the middle beam 400, thereby reducing the risk of the edge of the door panel 200 abutting against the middle beam 400 and the axle cover 500, so that the rotating shaft mechanism 22 can rotate normally, which is beneficial to improving the reliability of the overall structure.

[0121] In some embodiments, please continue to refer to FIG15, a planar sliding pair 740 can be formed between the door panel 200 and the connecting block 300. That is, during the rotation of the first swing arm 140, the first swing arm 140 pushes the door panel 200 to slide relative to the connecting block 300 along a surface parallel to the connecting block 300 toward the door panel 200, thereby realizing the adjustment of the relative position between the door panel 200 and the middle beam 400.

[0122] The door panel 200 and the first swing arm 140 can be connected by a higher pair mechanism 700. During the rotation of the first swing arm 140 from the unfolded state to the folded state, the first swing arm 140 pushes the door panel 200 to move relative to the connecting block 300 through the higher pair mechanism 700.

[0123] The higher-pair mechanism 700 may include a sliding groove 220 and a second sliding member 141. The structure of the second sliding member 141 includes, but is not limited to, a slider, a sliding column, a roller, a ball, a roller shaft, or a drum. One of the sliding groove 220 and the second sliding member 141 is disposed on the first swing arm 140, and the other of the sliding groove 220 and the second sliding member 141 is disposed on the door panel 200. The second sliding member 141 extends into the sliding groove 220.

[0124] During the rotation of the first swing arm 140 between the unfolded and folded states, the second slider 141 slides along the extension direction of the sliding groove 220, pushing the door panel 200 to move relative to the connecting block 300. That is, during the sliding of the second slider 141 along the extension direction of the sliding groove 220, the second slider 141 abuts against the inner wall of the sliding groove 220, and at least one component force along the sliding direction of the door panel 200 (e.g., a component force along the X-axis) is generated, thereby enabling the second slider 141 to push the door panel 200 to move along the X-axis (as shown in Figures 11-13) during the sliding process, that is, the door panel 200 can move away from or towards the center beam 400.

[0125] Furthermore, the connection method between the first swing arm 140 and the middle beam 400 is not unique. For example, referring to Figure 15, the first swing arm 140 and the middle beam 400 can be rotatably connected through a revolute joint 710. In this case, in order for the first swing arm 140 to push the door panel 200 to move relative to the connecting block 300, the rotation axis of the first swing arm 140 and the rotation axis of the second swing arm 150 can be parallel but not coincident. This allows the first swing arm 140 to generate displacement along the X-axis or Z-axis relative to the connecting block 300 and the door panel 200 during rotation, thereby causing relative sliding between the second sliding member 141 and the sliding groove 220, and thus generating a component force that can push the door panel 200 to move.

[0126] Alternatively, please refer to Figure 16, which is a schematic diagram of the motion principle of another rotating shaft mechanism 22 provided in this embodiment. The first swing arm 140 and the middle beam 400 can also be rotatably connected by a screw pair 720, the axis of which coincides with the rotation axis of the first swing arm 140. In this case, during rotation, the first swing arm 140 can also move along its rotation axis, i.e., the Y-axis direction, so that the second sliding member 141 can slide relative to the sliding groove 220 and generate a component force that can push the door panel 200 to move.

[0127] Based on this, please refer to Figure 17, which is a schematic diagram of the motion principle of another rotating shaft mechanism 22 provided in this application embodiment. To ensure the sliding direction of the door panel 200 relative to the connecting block 300, the door panel 200 and the connecting block 300 can also be slidably connected by a sliding pair 730. Specifically, the sliding pair 730 may include a first sliding member 210 and a straight sliding groove 310. The structure of the second sliding member 141 includes, but is not limited to, a slider, a sliding column, a roller, a ball, a roller shaft, or a drum. The extension direction of the straight sliding groove 310 is the same as the sliding direction of the door panel 200, that is, the extension direction of the straight sliding groove 310 is parallel to the surface of the connecting block 300 facing the door panel 200 (for example, the X-axis direction when the rotating shaft mechanism 22 is in the unfolded or folded state). One of the first sliding member 210 and the straight sliding groove 310 is disposed on the door panel 200, and the other of the first sliding member 210 and the straight sliding groove 310 is disposed on the connecting block 300. The first sliding member 210 extends into the straight sliding groove 310 so that the door panel 200 and the connecting block 300 are slidably connected, thereby limiting the sliding trajectory of the door panel 200 relative to the connecting block 300, which is beneficial to improving the reliability of the overall structure.

[0128] Furthermore, please refer to Figure 18, which is a schematic diagram of the motion principle of another rotating shaft mechanism 22 provided in this application embodiment. The first swing arm 140 of this rotating shaft mechanism 22 and the connecting block 300 can also be slidably connected using a sliding pair. Specifically, a third sliding groove 320 can be provided on the connecting block 300, and the end of the first swing arm 140 away from the central beam 400 extends into the sliding groove 220, so that it can slide relative to the first swing arm 140 within the third sliding groove 320 during rotation. This structure makes the rotating shaft mechanism 22 more compact, which is beneficial for miniaturization of the overall structure.

[0129] The above is a simplified structural diagram illustrating the basic structure of the rotating shaft mechanism 22 provided in this application embodiment. The specific structure of the rotating shaft mechanism 22 will be described in detail below with reference to three-dimensional diagrams. Since the connection structures between the central beam 400 and the first swing arms 140, connecting blocks 300, and door panels 200 on both sides are identical, the following embodiments will focus on the connection structures between the first swing arms 140, connecting blocks 300, second swing arms 150, and door panels 200 located on the same side of the central beam 400 and the central beam 400.

[0130] As can be seen from the above embodiments, during the rotation of the first swing arm 140 from the unfolded state to the folded state, the first swing arm 140 can push the door panel 200 to move away from the center beam 400 through the aforementioned higher pair mechanism 700. The higher pair mechanism 700 includes a sliding groove 220 and a second sliding member 141. The second sliding member 141 abuts against the side wall of the sliding groove 220. During relative movement, the second sliding member 141 slides along the side wall of the sliding groove 220 to apply a thrust to the side wall of the sliding groove 220, thereby enabling the first swing arm 140 to push the door panel 200 to move. In the following embodiments, the sliding groove 220 is provided on the door panel 200, and the second sliding member 141 is provided on the first swing arm 140 as an example for explanation.

[0131] In some embodiments, please refer to Figures 19 and 20. Figure 19 is a partial structural diagram of the sliding groove 220 of the high-pair mechanism 700 provided in the present application embodiment, and Figure 20 is a partial structural diagram of the second sliding member 141 of the high-pair mechanism 700 provided in the present application embodiment.

[0132] The sliding groove 220 can extend along a first direction, which is parallel to the door panel 200, that is, the first direction is parallel to the XY plane, and the first direction intersects with the rotation axis (Y-axis direction) of the first swing arm 140, that is, the first direction is inclined relative to the Y-axis direction.

[0133] Please refer to Figures 21 and 22. Figure 21 is an assembly diagram of the higher pair mechanism 700 provided in an embodiment of this application, and Figure 22 is a partial cross-sectional view of the higher pair mechanism 700 provided in Figure 21 along a plane parallel to the XY plane. In Figure 21, the dashed line represents the first swing arm 140 covered by the door panel 200, and the higher pair mechanism 700 between the first swing arm 140 and the door panel 200.

[0134] During the rotation of the first swing arm 140 relative to the middle beam 400, that is, during the sliding of the second sliding member 141 along the extension direction of the sliding groove 220, the relative motion direction between the second sliding member 141 and the sliding groove 220 can be decomposed into direction a and direction b as shown in Figure 22. Direction a can be parallel to the Y-axis direction, and direction b can be parallel to the X-axis direction.

[0135] That is, when the first swing arm 140 moves in the direction a, the second sliding member 141 can apply a component force in the direction b to the door panel 200, so that the door panel 200 moves relative to the connecting block 300 in the direction of the X axis, thereby realizing the movement of the door panel 200 away from or closer to the middle beam 400, that is, adjusting the relative position between the door panel 200 and the middle beam 400.

[0136] It is understood that the extension direction of the aforementioned sliding groove 220 can refer to the line connecting the two ends of the sliding groove 220, and the extension path between the two ends of the sliding groove 220 can be flexibly set according to actual needs. For example, the extension path of the sliding groove 220 can extend along a straight line or along an arc.

[0137] Alternatively, as shown in Figure 21, the extension path of the sliding groove 220 can also include multiple non-collinear straight paths connected end to end in sequence. In this case, the extension directions of the multiple straight paths all intersect, so that when the second slider 141 slides within the sliding groove 220, the movement speed of the second slider 141 can be changed based on the change in extension direction. This adjusts the rotation speed of the terminal at different positions when rotating between the unfolded and folded states, which helps protect the terminal and reduces the risk of impact damage caused by excessive terminal rotation speed. Therefore, this application does not impose any special limitations on this aspect.

[0138] Based on this, in order for the second sliding member 141 to slide along the sliding groove 220, the first swing arm 140 and the middle beam 400 can be rotatably connected by a helical pair 720 as shown in Figure 17. Please refer to Figures 23 and 24. Figure 23 is an exploded view of the middle beam 400 and the first swing arm 140 provided in the embodiment of this application, and Figure 24 is an assembly diagram of the middle beam 400 and the first swing arm 140 provided in Figure 23.

[0139] The axis of the helical pair 720 coincides with the rotation axis of the first swing arm 140. That is, during the rotation of the first swing arm 140, it can also move along the rotation axis of the first swing arm 140, so that the second sliding member 141 can slide relative to the sliding groove 220 (as shown in Figures 20 and 21) in the Y-axis direction. Since the extension direction of the sliding groove 220 intersects the Y-axis direction, the second sliding member 141 can apply a component force in the X-axis direction to the sliding groove 220, that is, the first swing arm 140 pushes the door panel 200 to slide in the X-axis direction.

[0140] That is, the relative motion between the second sliding member 141 and the sliding groove 220 can be decomposed into motions along the Y-axis and along the X-axis. The first swing arm 140 is limited to move along the Y-axis by the aforementioned screw pair 720, thereby pushing the door panel 200 to move along the X-axis.

[0141] Specifically, the first swing arm 140 has a first mating surface 142, and the middle beam 400 has a second mating surface 411. At least one of the first mating surface 142 and the second mating surface 411 extends spirally around the rotation axis of the first swing arm 140, so that a helical pair 720 is formed between the first swing arm 140 and the middle beam 400, and the first mating surface 142 and the second mating surface 411 are mutually engaged. For example, an arc-shaped groove 410 may be provided on the middle beam 400. The axis of the arc-shaped groove 410 coincides with the rotation axis of the first swing arm 140. Along the Y-axis direction, the two end faces of the first swing arm 140 that extend into the arc-shaped groove 410 are the first mating surfaces 142, and the two end faces of the arc-shaped groove 410 are the second mating surfaces 411. The first mating surface 142 and the second mating surface 411 are mutually engaged.

[0142] In this way, when the first swing arm 140 rotates relative to the middle beam 400, the first mating surface 142 and the second mating surface 411 move relative to each other. Since at least one of the first mating surface 142 and the second mating surface 411 extends spirally around the rotation axis of the first swing arm 140, the first swing arm 140 can also move along the Y-axis while rotating, thereby enabling the second sliding member 141 to slide relative to the sliding groove 220 along the Y-axis and apply a component force along the X-axis to the door panel 200 to push the door panel 200 to move along the X-axis.

[0143] In other possible examples, a guide groove and a guide protrusion (not shown in the figure) can be provided between the two surfaces of the first swing arm 140 and the arcuate groove 410 distributed along the Z-axis. The guide groove extends spirally around the rotation axis of the first swing arm 140, and the guide protrusion extends into the guide groove. In this case, the inner wall of the guide groove and the side wall of the guide protrusion form a first mating surface 142 and a second mating surface 411, respectively, so that the first swing arm 140 can move along the Y-axis during rotation.

[0144] Furthermore, in this case, the dimension of the arc-shaped groove 410 along the Y-axis direction needs to be larger than the dimension of the first swing arm 140 along the Y-axis direction, so that the first swing arm 140 can move within the arc-shaped groove 410 along the Y-axis direction. In addition, since the structural forms of the first mating surface 142 and the second mating surface 411 are not limited to the above-described structures, this application does not impose any special limitations on them.

[0145] In some embodiments, please refer to Figures 25, 26 and 27. Figure 25 is an exploded view of another middle beam 400 and first swing arm 140 provided in the embodiments of this application. Figure 26 is a structural view of the first swing arm 140 provided in Figure 25 from another perspective. Figure 27 is an AA cross-sectional view of the middle beam 400 and the first swing arm 140 provided in Figure 25 after assembly.

[0146] The rotating shaft mechanism 22 provided in this embodiment may further include a synchronous slider 800. Grooves 143 are provided on the surfaces of the two first swing arms 140 facing the central beam 400, and both ends of the synchronous slider 800 extend into the grooves 143 on the two first swing arms 140. In this way, when one first swing arm 140 rotates, it can move along its rotation axis (i.e., the Y-axis direction), thus driving the synchronous slider 800 to move along the Y-axis direction.

[0147] Furthermore, since the other end of the synchronizing slider 800 extends into the groove on the other first swing arm 140, the synchronizing slider 800 can drive the other first swing arm 140 to move along the Y-axis. Based on the function of the aforementioned screw pair 720, it can drive the first swing arm 140 to rotate, so that under the action of the synchronizing slider 800, the two first swing arms 140 can rotate synchronously.

[0148] To limit the movement direction of the synchronous slider 800, a limiting protrusion 810 and a limiting groove 430 can be provided between the synchronous slider 800 and the central beam 400. One of the limiting protrusion 810 and the limiting groove 430 is provided on the synchronous slider 800, and the other of the limiting protrusion 810 and the limiting groove 430 is provided on the central beam 400. The limiting groove 430 extends along the Y-axis direction, and the limiting protrusion 810 extends into the limiting groove 430, thereby limiting the movement of the synchronous slider 800 along the Y-axis direction, which helps to improve the reliability of the overall structure.

[0149] For example, the limiting protrusion 810 can be provided on the synchronous slider 800, and the limiting groove 430 can be formed on the middle beam 400. The limiting protrusion 810 and the synchronous slider 800 can be fixedly connected by means of bonding, welding and snap-fitting, or the limiting protrusion 810 and the synchronous slider 800 can be integrally formed, that is, the two form a whole structural component.

[0150] Furthermore, both ends of the synchronous slider 800 along the X-axis can be provided with limiting protrusions 810, and two corresponding limiting grooves 430 are formed on the central beam 400, with the two limiting protrusions 810 extending into their respective limiting grooves 430. In other examples, the number of limiting protrusions 810 can also be one, three, or four, etc. Therefore, this application does not impose any special limitations on this.

[0151] Based on this, to make the connection structure between the first swing arm 140, the connecting block 300, and the door panel 200 more compact, please refer to Figures 28, 29, and 30. Figure 28 is a structural diagram of the pivot mechanism 22 provided in this embodiment, including another connecting block 300. Figure 29 is an exploded view of the pivot mechanism 22 provided in Figure 28. Figure 30 is a partial assembly diagram of the pivot mechanism 22 provided in Figure 28. In Figure 28, the door panel 200 is not shown. In Figure 30, the dashed lines represent the first swing arm 140 and the connecting block 300, etc., covered by the door panel 200. The middle beam 400 and the bushing 500 are not shown in Figure 30.

[0152] In the rotating shaft mechanism 22, a third sliding groove 320 can be provided on the connecting block 300. The third sliding groove 320 is provided on the surface of the connecting block 300 facing the middle beam 400. The end of the first swing arm 140 away from the middle beam 400 extends into the third sliding groove 320, thereby realizing the sliding connection between the first swing arm 140 and the connecting block 300, so as to make the overall structure more compact and help save space.

[0153] It is understood that the extension direction of the third slide groove 320 is based on the movement direction of the first swing arm 140. For example, when the first swing arm 140 can move along the Y-axis during rotation, the third slide groove 320 extends along the Y-axis so that the first swing arm 140 can slide relative to the connecting block 300 along the Y-axis. Therefore, this application does not impose any special limitation on the extension direction of the third slide groove 320.

[0154] Furthermore, a notch 330 may be provided on the connecting block 300, which communicates with the third sliding groove 320. The second sliding element is located within the notch 330, meaning the notch 330 penetrates the wall panel of the connecting block 300 between the first swing arm 140 and the door panel 200. At the notch 330, a local area between the first swing arm 140 and the door panel 200 is opposite each other, and the aforementioned high-pair mechanism 700 is disposed in this local area, i.e., the high-pair mechanism 700 is located within the notch 330. With this structure, the connection structure of the first swing arm 140, the door panel 200, and the connecting block 300 becomes more compact, which is beneficial for the miniaturization of the pivot mechanism 22, thereby contributing to the miniaturization of the foldable screen terminal 01.

[0155] In other embodiments, please refer to FIG31, which is a partial structural diagram of another sliding groove 220 provided in an embodiment of this application. The door panel 200 shown in FIG31 is in an unfolded state, that is, the door panel 200 covers the middle beam 400. The sliding groove 220 extends along a second direction, which is perpendicular to the Y-axis direction and intersects the width direction (i.e., the X-axis direction) of the door panel 200, that is, the second direction is inclined relative to the X-axis direction.

[0156] In this way, the relative motion between the second sliding member 141 and the sliding groove 220 is decomposed into motions along the X-axis and along the Z-axis. During the rotation of the first swing arm 140, that is, during the rotation of the first sliding member 141 relative to the middle beam 400, it can move relative to the door panel 200 along the X-axis or along the Z-axis.

[0157] For example, when the first sliding member 141 shown in Figure 31 moves upward along the Z-axis, it can drive the door panel 200 to move to the left along the X-axis, that is, to move away from the middle beam 400, thereby realizing the relative sliding of the second sliding member 141 and the sliding groove 220 to push the door panel 200 to move along the X-axis.

[0158] In some other possible embodiments, the extending direction of the sliding groove 220 may also be the same as the movement direction of the door panel 200, that is, the sliding groove 220 extends along the X-axis. When the second slider 141 moves to the end of the sliding groove 220 away from the center beam 400, it can push the door panel 200 to slide away from the center beam 400. Therefore, this application does not specifically limit the extending direction of the sliding groove 220.

[0159] Furthermore, in order for the first swing arm 140 to move relative to the connecting block 300 along the X-axis or Z-axis direction during rotation, the rotation axis of the first swing arm 140 can be made not to coincide with the rotation axis of the connecting block 300. Since the connecting block 300 is fixedly connected to the second swing arm 150, the rotation axis of the first swing arm 140 and the rotation axis of the second swing arm 150 are parallel but not on the same axis.

[0160] In this way, during the rotation of the first swing arm 140 and the second swing arm 150, displacements will occur between them along the X-axis and Z-axis directions. That is, the first swing arm 140 can move relative to the connecting block 300 and the door panel 200 along the X-axis or Z-axis direction, so that the second sliding member 141 can slide in the sliding groove 220, so that the second sliding member 141 can provide a component force along the X-axis direction to the door panel 200, thereby pushing the door panel 200 to move along the X-axis direction.

[0161] It is understood that the aforementioned higher pair mechanism 700 is used to provide a driving force for the door panel 200 to move relative to the center beam 400, for example, driving the door panel 200 to move along the X-axis. The specific structure of the higher pair mechanism 700 is not limited to the above-mentioned types, that is, the specific structure of the sliding groove 220 and the second sliding member 141 can be flexibly set according to actual design requirements. Therefore, this application does not impose any special limitations on it.

[0162] Based on this, to ensure the sliding direction of the door panel 200, a sliding connection can be achieved between the door panel 200 and the connecting block 300 through a sliding pair 730. The sliding pair 730 can limit the movement direction of the door panel 200, thereby improving structural reliability. For example, the sliding pair 730 can limit the door panel 200 to slide only along the X-axis direction. In the following embodiments, the sliding of the door panel 200 along the X-axis direction will be used as an example for explanation.

[0163] Please refer to Figures 32, 33 and 34. Figure 32 is an exploded view of the door panel 200 and the connecting block 300 provided in the embodiment of this application. Figure 33 is a partial assembly structure diagram of the door panel 200 and the connecting block 300 provided in Figure 32. Figure 34 is an enlarged view of the structure of area A in Figure 33.

[0164] The sliding pair 730 includes a straight slide groove 310 and a first sliding member 210. The extension direction of the straight slide groove 310 is the same as the movement direction of the door panel 200, that is, parallel to the surface of the connecting block 300 facing the door panel 200. The first sliding member 210 extends into the straight slide groove 310. During the sliding process of the door panel 200 relative to the connecting block 300, the first sliding member 210 slides along the extension direction of the straight slide groove 310, that is, the door panel 200 slides along the extension direction of the straight slide groove 310. In the following embodiments, the straight slide groove 310 is formed on the connecting block 300 and the first sliding member 210 is disposed on the door panel 200 as an example for description.

[0165] In some embodiments, the straight slide groove 310 may be disposed on at least one sidewall at both ends of the connecting block 300 along its length direction. The length direction of the connecting block 300 is parallel to the Y-axis direction, that is, the straight slide groove 310 has two inner walls distributed along the thickness direction of the connecting block 300. Here, the thickness direction of the connecting block 300 refers to the distribution direction of the connecting block 300 and the door panel 200 stacked together. When the first swing arm is in the extended state, the thickness direction of the connecting block 300 is the aforementioned Z-axis direction.

[0166] The first sliding member 210 includes a connecting part 211 and a limiting part 212. One end of the connecting part 211 is fixedly connected to the door panel 200, and the other end of the connecting part 211 is fixedly connected to the limiting part 212. The limiting part 212 extends into the straight sliding groove 310 and is located between two inner walls distributed along the Z-axis direction in the straight sliding groove 310.

[0167] In this structure, the first sliding member 210 can be formed into an approximately L-shaped structure. On one hand, the limiting part 212 sliding within the straight sliding groove 310 can restrict the sliding direction of the door panel 200 relative to the connecting block 300. On the other hand, the edge of the connecting block 300 is located between the door panel 200 and the limiting part 212, and can also limit the connection block 300 and the door panel 200 along the Z-axis direction to prevent the door panel 200 and the connecting block 300 from separating from each other along the Z-axis direction, thereby further improving the reliability of the overall structure.

[0168] To improve the stability of the sliding connection between the door panel 200 and the connecting block 300, straight sliding grooves 310 are provided on both side walls of the connecting block 300 along the Y-axis direction, and two first sliding members 210 are correspondingly provided on the door panel 200, so that there are two sets of sliding pairs 730 between the door panel 200 and the connecting block 300, and the two sets of sliding pairs 730 are distributed at both ends of the connecting block 300 along the Y-axis direction, thereby balancing the forces between the door panel 200 and the connecting block 300 and improving the sliding stability between the door panel 200 and the connecting block 300.

[0169] Furthermore, please refer to Figure 35, which is a structural diagram of the straight slide groove 310 and the first sliding member 210 provided in the embodiment of this application. Along the thickness direction of the door panel 200, that is, along the Z-axis direction, the two wall panels on both sides of the straight slide groove 310 are the first wall panel 311 and the second wall panel 312, respectively. The first wall panel 311 is located between the limiting part 212 and the door panel 200. That is, the straight slide groove 310 divides the connecting block 300 into two layers, and the first wall panel 311 is located between the second wall panel 312 and the door panel 200. When the first sliding member 210 extends into the straight slide groove 310, the limiting part 212 extends into the straight slide groove 310, that is, the first wall panel 311 is located between the limiting part 212 and the door panel 200, so that a limiting structure along the Z-axis direction can be formed between the door panel 200 and the connecting block 300.

[0170] Furthermore, to save space along the Y-axis, the length L1 of the first wall panel 311 along the Y-axis can be smaller than the length L2 of the second wall panel 312 along the Y-axis. When the limiting part 212 extends into the straight slide groove 310, the length of the first sliding member 210 protruding from the edge of the connecting block 300 along the Y-axis can be reduced, thereby reducing the space occupied by the first sliding member 210 along the Y-axis.

[0171] In some examples, along the Y-axis, the length L3 of the first slider 210 is less than or equal to the length L2 of the second wall panel 312. This causes the first slider 210 to be recessed within the edge of the connecting block 300, or the first slider 210 to be flush with the side wall of the connecting block 300, so that the first slider 210 does not increase the space occupied by the connecting block 300 along the Y-axis, thus making the overall structure more compact.

[0172] In some other possible embodiments, please refer to FIG36, which is a structural diagram of another straight slide groove 310 and first sliding member 210 provided in an embodiment of this application. The straight slide groove 310 and the first sliding member 210 can also be disposed between two opposing surfaces of the door panel 200 and the connecting block 300. For example, the straight slide groove 310 is formed on the surface of the connecting block 300 facing the door panel 200, and the straight slide groove 310 extends along the X-axis direction. The straight slide groove 310 has two inner walls distributed along the Z-axis direction, that is, the cross-section of the straight slide groove forms an approximately L-shaped structure. The limiting part 212 of the first sliding member 210 extends into the straight slide groove 310 between the two inner walls distributed along the Z-axis direction, and the connecting part 211 of the first sliding member 210 is fixed to the surface of the door panel 200 facing the connecting block 300. Therefore, the first sliding member 210 extends into the straight slide groove 310 and can slide along the extending direction of the straight slide groove 310, thereby defining the sliding direction between the door panel 200 and the connecting block 300.

[0173] Furthermore, multiple sets of straight sliding grooves 310 and first sliding members 210 can be provided between the door panel 200 and the connecting block 300, with the multiple sets of straight sliding grooves 310 and first sliding members 210 distributed at intervals along the Y-axis direction. The multiple sets of straight sliding grooves 310 and first sliding members 210 can adopt identical structures, or they can adopt different structures.

[0174] For example, the structure shown in Figure 35 can be provided on the sidewall of the connecting block 300 distributed along the Y-axis direction. Please refer to Figure 37, which is a structural diagram of another straight slide groove 310 and first sliding member 210 provided in the embodiment of this application. A sliding pair can be formed between the surfaces of the connecting block 300 and the door panel 200 by using a structure of protrusion (i.e., first sliding member 210) and groove (i.e., straight slide groove). The straight slide groove 310 and first sliding member 210 shown in Figure 37 can only restrict the sliding direction of the door panel 200, and the processing difficulty is low, which is beneficial to saving costs.

[0175] It is understood that the specific structures of the straight slide groove 310 and the first sliding member 210 are not limited to the above-mentioned types, and can be flexibly set according to actual needs. Therefore, this application does not impose any special limitations on them.

[0176] Based on this, multiple connecting blocks 300 can be provided on the same side of the aforementioned central beam 400. The multiple connecting blocks 300 are distributed at intervals along the length direction (i.e., the Y-axis direction) of the central beam 400. Therefore, multiple sets of sliding pairs 730 can be provided between the door panel 200 and the multiple connecting blocks 300. For example, at least one set of sliding pairs 730 is provided between each connecting block 300 and the door panel 200.

[0177] Alternatively, only two sets of sliding pairs 730 can be provided between the multiple connecting blocks 300 and the door panel 200. These two sets of sliding pairs 730 are provided at both ends of the door panel 200 along the Y-axis direction, that is, among the multiple connecting blocks 300 distributed along the Y-axis direction, a set of sliding pairs 730 is provided between the two connecting blocks 300 at both ends and the door panel 200.

[0178] Specifically, two connecting blocks 300 distributed along the Y-axis and located at both ends are respectively the first connecting block and the second connecting block. The ends of the first connecting block and the second connecting block that are far apart from each other are respectively provided with a set of sliding pairs 730 between them and the door panel 200. That is, the two sets of sliding pairs 730 are located at both ends of the door panel 200 along the Y-axis, which is conducive to the overall force balance and improves the reliability of the sliding connection between the door panel 200 and the connecting blocks 300.

[0179] It is understandable that when multiple connecting blocks 300 are provided on the same side of the central beam 400, the position and number of sliding pairs 730 between the connecting blocks 300 and the door panel 200 can be flexibly changed based on actual design requirements. Therefore, this application does not impose any special limitations on this.

[0180] Based on the above embodiments, please refer to Figures 38 and 39. Figure 38 is a partial structural diagram of a middle beam 400 provided in an embodiment of this application, and Figure 39 is a partial cross-sectional structural diagram of a foldable screen terminal 01 provided in an embodiment of this application. The middle beam 400 of the pivot mechanism 22 provided in this embodiment of this application has a support surface 420, which is located on the side of the middle beam 400 away from the shaft cover 500. When the first swing arm 140 is in the folded state, the side wall of the door panel 200 is opposite to the support surface 420.

[0181] The support surface 420 can be formed in a portion of the surface of the central beam 400 away from the axle cover 500. Multiple support surfaces 420 can be provided, spaced apart along the Y-axis. This allows the door panel 200 to face multiple support surfaces 420 when the first swing arm 140 is in a folded state, thus forming multiple support points and improving the overall structural reliability.

[0182] It is understood that since two door panels 200 are provided on both sides of the central beam 400, each door panel 200 on the central beam 400 has at least one of the aforementioned support surfaces 420. Furthermore, the number of support surfaces 420 corresponding to the two door panels 200 may be the same or different. Therefore, this application does not impose any special limitations on this.

[0183] Based on this, please refer to Figures 38 and 39. The housing 21 of the foldable screen terminal 01 may include a first region 21a and a second region 21b. The second region 21b is located on the side of the first region 21a away from the rotating shaft mechanism 22, that is, the first region 21a and the second region 21b are distributed along the X-axis direction, and the thickness of the first region 21a is less than the thickness of the second region 21b. The connecting block 300 is distributed and fixedly connected to the first region 21a along the Z-axis direction. When the foldable screen terminal 01 is in the folded state, the side wall of the door panel 200 away from the central beam 400 is opposite to the second region 21b, that is, the door panel 200 is located between the second region 21b and the aforementioned support surface 420.

[0184] In this way, when the foldable screen terminal 01 is in a folded state, the door panel 200 can form a support between the second region 21b of the housing 21 and the support surface 420. When the foldable screen terminal 01 is dropped or impacted, the shaft cover 500 and the middle beam 400 of the pivot mechanism 22 will deform in the direction closer to the foldable screen 10.

[0185] In this case, since the door panel 200 is located between the second region 21b of the housing 21 and the support surface 420, when the shaft cover 500 and the middle beam 400 move, after the support surface 420 comes into contact with the door panel 200, it will drive the door panel 200 to continue moving, so that the side of the door panel 200 away from the middle beam 400 comes into contact with the second region 21b of the housing 21.

[0186] At this time, the door panel 200 abuts against the second region 21b of the support surface 420 and the housing 21, that is, the door panel 200 can form a support between the support beam 400 and the second region 21b to disperse the impact force of the folding screen terminal 01 when it is dropped and hit, thereby preventing the shaft cover 500 and the beam 400 from continuing to move, reducing the risk of the beam 400 abutting against the folding screen 10, and improving the reliability of the overall structure.

[0187] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0188] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A rotation shaft mechanism characterized by comprising: The device includes a base, a first swing arm, a connecting block, and a door panel. A first end of the first swing arm is rotatably connected to the base, and a second end of the first swing arm is slidably connected to the door panel. The door panel is connected to the connecting block. The surface of the connecting block facing the door panel is a first surface. One of the door panel and the connecting block is provided with a first sliding member, and the other is provided with a straight sliding groove. During the rotation of the first swing arm relative to the base, the first swing arm drives the door panel to rotate, and the first sliding member slides in cooperation with the straight sliding groove so that the door panel slides in a direction parallel to the first surface.

2. The rotation shaft mechanism according to claim 1, wherein The base is provided with the first swing arm, the connecting block and the door panel on opposite sides, and the first swing arms on both sides of the base rotate in opposite directions. The first swing arm is rotatable relative to the base between a folded state and an unfolded state. When the first swing arm is in the folded state, the two door panels are opposite each other and spaced apart along the width direction of the base. When the first swing arm is in the unfolded state, the two door panels are on the same plane and cover the base.

3. A pivot mechanism according to claim 1 or 2, characterised in that The sliding direction of the door panel is perpendicular to the rotation axis of the first swing arm.

4. The rotating shaft mechanism according to any one of claims 1-3, characterized in that, The first sliding member includes a connecting part and a limiting part. One end of the connecting part is fixedly connected to the door panel or the connecting block, and the limiting part is fixed to the side wall of the other end of the connecting part. The straight sliding groove has two inner walls distributed along the thickness direction of the door panel or the connecting block, and the limiting part is located between the two inner walls.

5. The rotation shaft mechanism according to claim 4, wherein The straight sliding groove is formed at both ends of the connecting block along its length, and the first sliding member is correspondingly provided on the door panel.

6. The rotation shaft mechanism according to claim 5, wherein Along the thickness direction of the connecting block, the wall panels on both sides of the straight slide groove are a first wall panel and a second wall panel, with the first wall panel located between the limiting part and the door panel; Along a direction parallel to the rotation axis of the first swing arm, the length of the first wall panel is smaller than the length of the second wall panel.

7. The rotating shaft mechanism according to claim 6, characterized in that, Along a direction parallel to the rotation axis of the first swing arm, the length of the first sliding member is less than or equal to the length of the second wall panel.

8. The revolute mechanism according to any one of claims 1-7, wherein Multiple sets of the first sliding members and the straight sliding grooves are provided between the connecting block and the door panel, and the multiple sets of the first sliding members and the straight sliding grooves are distributed at intervals along the direction parallel to the rotation axis of the first swing arm.

9. The revolute mechanism according to any one of claims 1-8, wherein A plurality of connecting blocks are respectively provided on opposite sides of the base, and at least one of the plurality of connecting blocks located on the same side of the base is provided with the first sliding member and the straight sliding groove between it and the corresponding door panel.

10. The rotation shaft mechanism according to claim 9, wherein The multiple connecting blocks on the same side of the base are spaced apart along a direction parallel to the rotation axis of the first swing arm; along a direction parallel to the rotation axis of the first swing arm, the first sliding member and the straight sliding groove are provided between the two connecting blocks at both ends and the corresponding door panels.

11. The revolute mechanism according to any one of claims 1-10, wherein The pivot mechanism also includes a higher pair mechanism, through which the first swing arm and the door panel are slidably connected; During the rotation of the first swing arm between the unfolded state and the folded state, the first swing arm pushes the door panel to slide in a direction parallel to the first surface through the higher pair mechanism.

12. The rotation mechanism according to claim 11, wherein The high-pair mechanism includes a second sliding member and a sliding groove. One of the second sliding member and the sliding groove is disposed on the first swing arm, and the other of the second sliding member and the sliding groove is disposed on the door panel. The second sliding member extends into the sliding groove. During the rotation of the first swing arm, the second sliding member slides along the extension direction of the sliding groove and pushes the door panel to slide relative to the connecting block.

13. The rotation mechanism according to claim 12, wherein The sliding groove extends along a first direction, which is parallel to the first surface and intersects the rotation axis of the first swing arm.

14. A pivot mechanism according to claim 12 or 13, wherein During the rotation of the first swing arm between the unfolded and folded states, the first swing arm slides relative to the connecting block along the rotation axis of the first swing arm, and pushes the door panel to slide relative to the connecting block.

15. The rotation mechanism according to claim 14, wherein The first swing arm has a first mating surface, and the base has a second mating surface. At least one of the first mating surface and the second mating surface extends spirally around the rotation axis of the first swing arm, and the first mating surface and the second mating surface mate with each other.

16. The rotational axis mechanism of claim 15, wherein An arc-shaped groove is provided on the base, and the first end of the first swing arm extends into the arc-shaped groove; along the direction parallel to the rotation axis of the first swing arm, the two end faces of the end of the first swing arm that extends into the arc-shaped groove are the first mating surfaces, and the two end faces of the arc-shaped groove are the second mating surfaces.

17. A pivot mechanism according to any one of claims 14 to 16, wherein The rotating shaft mechanism further includes a synchronous slider. The first swing arm has a groove on its surface facing the base, and the first swing arm is provided on both sides of the base. Along the width direction of the base, the two ends of the synchronous slider extend into the two grooves respectively.

18. The rotational axis mechanism of claim 17, wherein, A limiting protrusion and a limiting groove are provided between the synchronous slider and the base. One of the limiting protrusion and the limiting groove is provided on the synchronous slider, and the other of the limiting protrusion and the limiting groove is provided on the base. The limiting groove extends along the rotation axis of the first swing arm, and the limiting protrusion extends into the limiting groove.

19. The revolute mechanism according to any one of claims 11-18, wherein, The connecting block has a third sliding groove on its side wall facing the base, and the end of the first swing arm away from the base extends into the third sliding groove.

20. The rotational axis mechanism of claim 19, wherein, The connecting block has a notch on its surface facing the door panel, the notch is connected to the third sliding groove, and the high-pair mechanism is located at the notch.

21. The revolute mechanism of any one of claims 1-20, wherein, The rotating shaft mechanism also includes a second swing arm, one end of which is rotatably connected to the base, and the other end of which is connected to the connecting block.

22. The revolute mechanism of any one of claims 1-21, wherein, The base has a support surface, and when the first swing arm is in the folded state, the side wall of the door panel is opposite to the support surface.

23. A foldable screen terminal, comprising: include: case; The rotating shaft mechanism is as described in any one of claims 1-22, wherein the housing is fixedly connected to the connecting block of the rotating shaft mechanism. 24.The foldable screen terminal of claim 23, wherein, The shell comprises a first region and a second region, the second region is arranged on the side of the first region away from the base of the rotating shaft mechanism, and the first region is fixedly connected with the connecting block; In the case that the first swing arm is in the folded state, the door panel is supported between the supporting surface of the rotating shaft mechanism and the second region.

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