Rotating mechanism and foldable electronic device

Abstract

The present application provides a rotating mechanism and a foldable electronic device. The rotating mechanism comprises a base, a first main swing arm and a second main swing arm. A first stop surface of the base is located in a first rotating groove of the base, and the plane where the first stop surface is located and a second stop surface of the first main swing arm both intersect with the width direction of the base. The first main swing arm is mounted in the first rotating groove, the second stop surface faces the first rotating groove, and the first main swing arm can rotate and slide along the first rotating groove. When the first main swing arm is unfolded relative to the base, the first stop surface and the second stop surface are oppositely arranged; in the width direction of the base, the first main swing arm is stopped on the base; and the first main swing arm and the second main swing arm can rotate towards each other, so that the first main swing arm is folded relative to the second main swing arm. The rotating mechanism provided in the present application can reduce the backlash of the foldable electronic device in an unfolded state, thereby solving the technical problem that redundancy and counter-arches are prone to occur in a display screen.

Description

Rotating mechanism and foldable electronic device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on November 21, 2023, with application number 202311549715.8 and application name “Rotating Mechanism and Foldable Electronic Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of electronic products, and in particular to a rotating mechanism and a foldable electronic device. Background Art

[0003] With the development of science and technology, the appearance (ID) of electronic devices (such as mobile phones, tablets, etc.) has tended to develop from candy-bar phones to foldable phones. Foldable electronic devices have a large display screen when open, which fully satisfies the visual experience of consumers. When closed, they are small in size and easy to carry. The hinge is the core component of foldable electronic devices. The main swing arm in the hinge supports the movement of the middle frame. In the prior art, when the foldable electronic device is in the flat state, the main swing arm has a virtual position, which will cause redundancy and anti-arching of the display screen, affecting the user experience.

[0004] Summary of the Invention

[0005] The present application provides a rotating mechanism and a foldable electronic device, which can reduce the virtual space of the foldable electronic device in a flattened state and solve the technical problem that the display screen is prone to redundancy and arching.

[0006] In a first aspect, the present application provides a rotation mechanism. The rotation mechanism includes a base, a first main swing arm and a second main swing arm. The base is provided with a first rotation groove and a second rotation groove, and the first rotation groove and the second rotation groove are arranged opposite to each other along the width direction of the rotation mechanism. The base includes a first stop surface, the first stop surface is located in the first rotation groove, and the plane where the first stop surface is located intersects with the width direction of the base. The first main swing arm includes a second stop surface, and the plane where the second stop surface is located intersects with the width direction of the base. The first main swing arm is installed in the first rotation groove, the second stop surface faces the first rotation groove, and the first main swing arm can rotate and slide along the first rotation groove; the second main swing arm is installed in the second rotation groove, and the second main swing arm can rotate and slide along the second rotation groove.

[0007] When the first main swing arm is unfolded relative to the base, the first stop surface and the second stop surface are arranged opposite to each other, and the first main swing arm and the base are stopped along the width direction of the base, and the first main swing arm and the second main swing arm can be rotated toward each other so that the first main swing arm is folded relative to the second main swing arm.

[0008] In this embodiment, a first stop surface is set on the base, a second stop surface is set on the first main swing arm, and when the first main swing arm is unfolded relative to the base, the second stop surface is arranged opposite to the first stop surface, so that the first stop surface can prevent the first main swing arm from moving toward the base along the width direction of the base, thereby reducing or even avoiding the empty space of the rotating mechanism in the unfolded state, thereby improving the user's experience; at the same time, it can also avoid redundancy and arching of the display screen, thereby improving the service life of the display screen.

[0009] The base also includes a third stop surface, which is located in the second rotation groove, and the plane where the third stop surface is located intersects with the width direction of the base. The second main swing arm includes a fourth stop surface, and the plane where the fourth stop surface is located intersects with the width direction of the base. The second main swing arm is installed in the second rotation groove, and the fourth stop surface faces the second rotation groove, and the second main swing arm can rotate and slide along the second rotation groove. When the second main swing arm is unfolded relative to the base, the third stop surface and the fourth stop surface are arranged opposite to each other, and the second main swing arm is stopped with the base along the width direction of the base.

[0010] In this embodiment, a third stop surface is set on the base and a fourth stop surface is set on the second main swing arm. When the second main swing arm is unfolded relative to the base, the fourth stop surface is arranged opposite to the third stop surface, so that the third stop surface can prevent the second main swing arm from moving toward the base along the width direction of the base, thereby further reducing or even avoiding the empty space of the rotating mechanism in the unfolded state, thereby improving the user experience.

[0011] In one possible embodiment, when the first main swing arm is extended relative to the base, the first stop surface and the second stop surface abut against each other, and the direction of the abutting force between the first stop surface and the second stop surface is consistent with the width direction of the base. When the second main swing arm is extended relative to the base, the fourth stop surface and the third stop surface abut against each other, and the direction of the abutting force between the fourth stop surface and the third stop surface is consistent with the width direction of the base.

[0012] It should be noted that when the rotating mechanism is in the expanded state, the user may apply a force toward the base to the main swing arm during use. This force causes the main swing arm to have a tendency to move toward the base along the width direction of the base. This tendency is the virtual position when the rotating mechanism is in the expanded state.

[0013] In this embodiment, by setting the directions of the first stop surface and the second stop surface to be perpendicular to the width direction of the base, the direction of the supporting force between the first stop surface and the second stop surface is consistent with the width direction of the base, so that the stop force direction of the rotating mechanism is parallel to the direction in which the user squeezes the virtual position when using the foldable electronic device, thereby improving the stop accuracy of the rotating mechanism and enhancing the user experience.

[0014] In one possible embodiment, the first rotation slot includes a first inner wall disposed away from the second rotation slot and including a first stop surface. The base further includes a first guide rail secured to the first inner wall and extending away from the second rotation slot, the first guide rail being arranged side by side with the first stop surface. The first main swing arm includes a first end, the first main swing arm being provided with a first groove, the opening of the first groove being located on the top or bottom surface of the first main swing arm and extending through the first end.

[0015] When the first main swing arm is installed on the base, the first end faces the first rotation groove, at least part of the first guide rail is located in the first groove, and the first main swing arm can rotate and slide in the first rotation groove along the first guide rail.

[0016] In this embodiment, a first guide rail is provided on the base, a first groove is provided on the first main swing arm, and the first guide rail is installed in the first groove, so that the first main swing arm can rotate relative to the base along the first guide rail, thereby improving the rotation stability of the first main swing arm and preventing the first main swing arm from deviating from the preset path during rotation, thereby improving the stopping effect and stopping accuracy between the second stop surface and the first stop surface.

[0017] In one possible embodiment, the first guide rail and the first stop surface are arranged side by side along the length of the base; the opening of the first groove is located on the bottom surface of the first main swing arm, and the second stop surface is provided on the side wall of the first groove and faces the first end. When the first main swing arm is mounted on the base, the first guide rail is located on the side of the first groove facing away from the top surface of the base, and the top surface of the first guide rail faces and contacts the bottom wall of the groove.

[0018] In this embodiment, by arranging the first guide rail and the first stop surface side by side along the length direction of the base, and arranging the second stop surface on the side wall of the first groove, when the first main swing arm rotates relative to the base along the first guide rail, the first stop surface can rotate along the rotation path of the first main swing arm toward the second stop surface, thereby avoiding the first stop surface from deviating from the second stop surface when the first main swing arm is unfolded relative to the base, and further improving the stopping effect and stopping accuracy between the second stop surface and the first stop surface.

[0019] In one possible embodiment, the first guide rail and the first stop surface are arranged side by side along the thickness direction of the base, and the first guide rail is located on the side of the first stop surface closest to the top surface of the base. The opening of the first groove is located on the top surface of the first main swing arm, and the second stop surface is provided at the first end and connected between the bottom surface of the first main swing arm and the bottom wall of the first groove. When the first main swing arm is mounted on the base, the first guide rail is located on the side of the first groove closest to the top surface of the base, and the bottom surface of the first guide rail is opposite and in contact with the bottom wall of the groove.

[0020] In this embodiment, by arranging the second stop surface at the end of the first main swing arm, the area of ​​the second stop surface can be increased, thereby increasing the contact area between the second stop surface and the first stop surface, and increasing the stop area between the first main swing arm and the base, thereby further improving the stopping effect and stopping accuracy of the first main swing arm and the base, and further reducing or even avoiding the virtual position when the rotating mechanism is in the expanded state.

[0021] In one possible embodiment, the first stop surface includes a first sub-stop surface, which is arranged side by side with the first guide rail along the thickness direction of the base and is located on a side of the first guide rail that is closer to the top surface of the base. The opening of the first groove is located on the bottom surface of the first main swing arm, and the second stop surface includes a second sub-stop surface, which is arranged at the first end and connected between the top surface of the first main swing arm and the bottom wall of the first groove.

[0022] When the first main swing arm is mounted on the base, the first guide rail is located on a side of the first groove facing away from the top surface of the base, and the top surface of the first guide rail is opposite to and in contact with the bottom wall of the first groove. When the first main swing arm is extended relative to the base, the first sub-stop surface is disposed opposite to the second sub-stop surface.

[0023] In this embodiment, by setting a second sub-stop surface on the second stop surface, and the second sub-stop surface is set at the end of the first main swing arm, the area of ​​the second sub-stop surface can be increased, thereby increasing the contact area between the second sub-stop surface and the first sub-stop surface, and increasing the stop area between the first main swing arm and the base, thereby further improving the stopping effect and stopping accuracy of the first main swing arm and the base, and further reducing or even avoiding the virtual position when the rotating mechanism is in the expanded state.

[0024] In one possible embodiment, the first stop surface further includes a third sub-stop surface, disposed parallel to the first guide rail along the length of the base. The first main swing arm further includes a fourth sub-stop surface, disposed on a sidewall of the first groove and facing the first end. When the first main swing arm is extended relative to the base, the third sub-stop surface and the fourth sub-stop surface are disposed opposite each other.

[0025] In this embodiment, by further providing a third sub-stop surface on the base and further providing a fourth sub-stop surface on the first main swing arm, when the rotating mechanism is in the expanded state, the first main swing arm and the base are stopped not only by the second sub-stop surface and the first sub-stop surface, but also by the fourth sub-stop surface and the third sub-stop surface, thereby further preventing the first main swing arm from continuing to move along the width direction of the base toward the base, further improving the stopping effect and stopping accuracy, reducing or even avoiding the virtual position when the rotating mechanism is in the expanded state, and improving the user experience.

[0026] In one possible embodiment, the first stop surface includes a first sub-stop surface, and the first guide rail and the first sub-stop surface are arranged side by side along the length of the base. The second stop surface includes a second sub-stop surface, and the second sub-stop surface is provided at one end of the first main swing arm and connected between the top surface and the bottom surface of the first main swing arm. When the first main swing arm is extended relative to the base, the first sub-stop surface and the second sub-stop surface are arranged opposite each other.

[0027] In this embodiment, by setting a second sub-stop surface on the second stop surface, and the second sub-stop surface is the end surface of the first main swing arm, the area of ​​the second sub-stop surface can be further increased, thereby increasing the contact area between the second sub-stop surface and the first sub-stop surface, increasing the stop area between the first main swing arm and the base, and further improving the stopping effect and stopping accuracy of the first main swing arm and the base, and further reducing or even avoiding the virtual position when the rotating mechanism is in the expanded state.

[0028] In one possible embodiment, the first stop surface further includes a third sub-stop surface, which is arranged side by side with the first stop surface and the first guide rail along the length direction of the base, and the third sub-stop surface is located between the first sub-stop surface and the first guide rail. The opening of the first groove is located on the bottom surface of the first main swing arm; the second stop surface further includes a fourth sub-stop surface, which is arranged on the side wall of the first groove and faces the first end. When the first main swing arm is installed on the base, the first guide rail is located on the side of the first groove facing away from the top surface of the base, and the top surface of the first guide rail is opposite to and in contact with the bottom wall of the first groove. When the first main swing arm is unfolded relative to the base, the third sub-stop surface and the fourth sub-stop surface are arranged opposite to each other.

[0029] In this embodiment, by further providing a third sub-stop surface on the base and further providing a fourth sub-stop surface on the first main swing arm, when the rotating mechanism is in the expanded state, the first main swing arm and the base are stopped not only by the second sub-stop surface and the first sub-stop surface, but also by the fourth sub-stop surface and the third sub-stop surface, thereby further preventing the first main swing arm from continuing to move along the width direction of the base toward the base, further improving the stopping effect and stopping accuracy, reducing or even avoiding the virtual position when the rotating mechanism is in the expanded state, and improving the user experience.

[0030] In a possible implementation manner, the first stop surface and the second stop surface are interference fit.

[0031] It should be explained that the "interference fit" referred to here refers to mutual support and compression. In this embodiment, by providing an interference fit between the first stop surface and the second stop surface, a compression fit between the first stop surface and the second stop surface can be achieved, thereby further preventing the first main swing arm from moving along the width direction of the base toward the base. This can further improve the stopping accuracy of the rotation mechanism, reduce the virtual position of the rotation mechanism in the unfolded state, improve the reliability of the display screen of the foldable electronic device, and enhance the user experience.

[0032] In a possible implementation manner, the interference between the first stop surface and the second stop surface is 0 mm to 0.1 mm.

[0033] In a possible implementation manner, the rotating mechanism further includes a wear-resistant layer, and the wear-resistant layer is provided on the first stop surface and / or the second stop surface.

[0034] In this embodiment, by providing a wear-resistant layer on the stop surface, the wear resistance of the stop surface can be improved, thereby improving the stopping effect between the first stop surface and the second stop surface, thereby improving the service life of the rotating mechanism and improving the stopping accuracy of the rotating mechanism throughout its life cycle.

[0035] In one possible embodiment, the rotating mechanism has a folded state and an unfolded state. When the rotating mechanism switches from the unfolded state to the folded state, the first main swing arm rotates along a first direction. When the rotating mechanism is in the unfolded state, the first main swing arm and the base stop in a second direction; wherein, the second direction is opposite to the first direction.

[0036] In this embodiment, when the rotating mechanism is in the unfolded state, the first main swing arm and the base are stopped in the second direction, thereby preventing the foldable electronic device from being over-unfolded and causing damage to the display screen.

[0037] In one possible embodiment, the base includes a shaft cover and a support plate, wherein the shaft cover and the support plate are stacked and fixedly connected to each other. When the first main swing arm and the second main swing arm are relatively unfolded, the top surface of the first main swing arm and the top surface of the second main swing arm are both flush with the surface of the support plate facing away from the shaft cover.

[0038] The top surface of the first main swing arm, the top surface of the second main swing arm and the top surface of the support plate are used together to support the display screen, thereby improving the reliability of the display screen and ensuring good display of the display screen.

[0039] In a second aspect, the present application provides a foldable electronic device. The foldable electronic device includes a first housing, a second housing, a display screen, and the aforementioned rotation mechanism. The rotation mechanism is connected between the first and second housings, and the display screen is mounted between the first and second housings, and the rotation mechanism. When the rotation mechanism rotates, the first and second housings rotate relative to each other, causing the display screen to bend or unfold.

[0040] The foldable electronic device with the above-mentioned rotating mechanism has little or no dead space when in the unfolded state, and the display screen is not prone to redundancy and arching.

[0041] In summary, the rotating mechanism provided by the present application sets a first stop surface on the base and a second stop surface on the first main swing arm, and when the first main swing arm is unfolded relative to the base, the second stop surface is arranged opposite to the first stop surface, so that the second stop surface can prevent the first main swing arm from moving toward the base along the width direction of the base, thereby reducing or even avoiding the virtual position of the rotating mechanism in the unfolded state, thereby improving the user's experience; at the same time, it can also avoid redundancy and arching of the display screen, thereby improving the service life of the display screen, and preventing the foldable electronic device from being over-expanded and causing damage to the display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background technology, the drawings required for use in the embodiments of the present application or the background technology will be described below.

[0043] FIG1 is a schematic structural diagram of a foldable electronic device in a first state provided by an embodiment of the present application;

[0044] FIG2 is a schematic structural diagram of a foldable electronic device in a second state provided by an embodiment of the present application;

[0045] FIG3 is a schematic structural diagram of a foldable electronic device in a third state provided by an embodiment of the present application;

[0046] FIG4 is a schematic diagram of the exploded structure of the foldable electronic device shown in FIG3 ;

[0047] FIG5 is a schematic structural diagram of a rotating mechanism in the foldable electronic device shown in FIG4 ;

[0048] FIG6 is a schematic diagram of the exploded structure of the rotating mechanism shown in FIG5 ;

[0049] FIG7 is a schematic diagram of a partial structure of the base in the rotating mechanism shown in FIG5 ;

[0050] FIG8 is an enlarged structural diagram of the main swing arm in the rotating mechanism shown in FIG6;

[0051] FIG9 is a schematic structural diagram of the main swing arm shown in FIG8 at another angle;

[0052] FIG10 is a schematic diagram of a portion of the structure of the rotating mechanism shown in FIG5;

[0053] FIG11 is a schematic cross-sectional view of the rotating mechanism shown in FIG10 along the AA direction;

[0054] FIG12 is a schematic diagram of a partial structure of the rotating mechanism shown in FIG5 in a second embodiment;

[0055] FIG13 is a schematic structural diagram of the bracket in the rotating mechanism shown in FIG12;

[0056] FIG14 is a schematic diagram of the exploded structure of the bracket shown in FIG13 at another angle;

[0057] FIG15 is an enlarged structural diagram of the main swing arm in the rotating mechanism shown in FIG12;

[0058] FIG16 is an enlarged structural diagram of the main swing arm shown in FIG15 at another angle;

[0059] FIG17 is a schematic cross-sectional view of the rotating mechanism shown in FIG12 along the BB direction;

[0060] FIG18 is a schematic diagram of a partial structure of the rotating mechanism shown in FIG5 in a third embodiment;

[0061] FIG19 is a schematic diagram of the exploded structure of the rotating mechanism shown in FIG18;

[0062] FIG20 is a schematic diagram of the exploded structure of the rotating mechanism shown in FIG18 at another angle;

[0063] FIG21 is a schematic cross-sectional view of the rotating mechanism shown in FIG18 along the CC direction;

[0064] FIG22 is a schematic diagram of a partial structure of the rotating mechanism shown in FIG5 in a fourth embodiment;

[0065] FIG23 is a schematic diagram of the exploded structure of the rotating mechanism shown in FIG22;

[0066] FIG24 is a schematic diagram of the exploded structure of the rotating mechanism shown in FIG22 at another angle;

[0067] FIG25 is a schematic cross-sectional view of the rotating mechanism shown in FIG22 along the DD direction;

[0068] FIG26 is a schematic structural diagram of a fixing frame in the first rotating assembly of the rotating mechanism shown in FIG5 ;

[0069] FIG27 is a schematic diagram of a portion of the structure of the pressure plate in the rotating mechanism shown in FIG5;

[0070] FIG28 is a schematic diagram of a partially exploded structure of the rotating mechanism shown in FIG6 . DETAILED DESCRIPTION

[0071] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0072] With the development of science and technology, the appearance (ID) of electronic devices (such as mobile phones, tablet computers, etc.) tends to develop from straight-screen phones to foldable phones. Foldable electronic devices have a large screen in the open state, which fully meets the visual experience of consumers. In the closed state, they are small in size and easy to carry. The hinge is the core component of the foldable electronic device, and the main swing arm in the hinge supports the movement of the middle frame. In the prior art, when the foldable electronic device is in the unfolded state, the main swing arm has a virtual position, which will cause redundancy and anti-arching of the display screen, affecting the user experience. The rotating mechanism provided in the present application has a stop mechanism, which can reduce the virtual position of the foldable electronic device in the unfolded state and avoid redundancy and anti-arching of the display screen.

[0073] Please refer to Figures 1 to 3. Figure 1 is a structural schematic diagram of the foldable electronic device 1000 provided in an embodiment of the present application in a first state, Figure 2 is a structural schematic diagram of the foldable electronic device 1000 provided in an embodiment of the present application in a second state, and Figure 3 is a structural schematic diagram of the foldable electronic device 1000 provided in an embodiment of the present application in a third state.

[0074] For ease of description, the width direction of the foldable electronic device 1000 is defined as the X direction, the length direction of the foldable electronic device 1000 is defined as the Y direction, and the thickness direction of the foldable electronic device 1000 is defined as the Z direction. The X direction, the Y direction, and the Z direction are perpendicular to each other.

[0075] The foldable electronic device 1000 includes, but is not limited to, a cell phone, a notebook computer, a tablet personal computer, a laptop computer, a personal digital assistant, a wearable device, or a mobile device. In the embodiment of the present application, the foldable electronic device 1000 is described as a cell phone.

[0076] Foldable electronic device 1000 has a folded state and an unfolded state. The unfolded state includes a semi-expanded state and a flattened state. FIG1 shows foldable electronic device 1000 in the folded state, FIG2 shows foldable electronic device 1000 in the semi-expanded state, and FIG3 shows foldable electronic device 1000 in the flattened state. The unfolded angle α of foldable electronic device 1000 shown in FIG2 is 90 degrees, and the unfolded angle β of foldable electronic device 1000 shown in FIG3 is 180 degrees.

[0077] It should be noted that the angles illustrated in the embodiments of the present application are allowed to have slight deviations. For example, the unfolding angle α of the foldable electronic device 1000 shown in Figure 2 is 90 degrees, which means that α can be 90 degrees, or approximately 90 degrees, such as 80 degrees, 85 degrees, 95 degrees or 0 degrees. The unfolding angle β of the foldable electronic device 1000 shown in Figure 3 is 180 degrees, which means that β can be 180 degrees, or approximately 180 degrees, such as 170 degrees, 175 degrees, 185 degrees and 190 degrees. The angles illustrated in the following examples can be understood in the same way.

[0078] The foldable electronic device 1000 shown in the embodiment of the present application is an electronic device that can be folded once. In other embodiments, the foldable electronic device 1000 can also be an electronic device that can be folded multiple times (more than twice). In this case, the foldable electronic device 1000 can include multiple parts. Two adjacent parts can be folded relatively close together until the foldable electronic device 1000 is in a folded state, and two adjacent parts can be unfolded relatively far apart until the foldable electronic device 1000 is in a flat state.

[0079] Please refer to FIG. 4 , which is a schematic diagram of the exploded structure of the foldable electronic device 1000 shown in FIG. 3 .

[0080] The foldable electronic device 1000 includes a folding device 200 and a display screen 300, and the display screen 300 is mounted on the folding device 200. The display screen 300 includes a display surface 340 and a mounting surface 350, and the display surface 340 and the mounting surface 350 are arranged relative to each other. The display surface 340 is used to display text, images, videos, etc. The display screen 300 includes a first part 310, a second part 320 and a foldable part 330. The foldable part 330 is located between the first part 310 and the second part 320, and the foldable part 330 can be bent along the Y direction. The first part 310, the second part 320 and the foldable part 330 together constitute the display screen 300. In this embodiment, the display screen 300 is a flexible display screen 300.

[0081] The folding device 200 includes a first shell 210, a second shell 220 and a rotating mechanism 100. The rotating mechanism 100 is partially fixed to the first shell 210 and partially fixed to the second shell 220 to achieve a rotating connection between the first shell 210 and the second shell 220. The display screen 300 is mounted on the folding device 200, and the mounting surface 350 is fixedly connected to the folding device 200. Specifically, the first shell 210 carries the first part 310 of the display screen 300, and the second shell 220 carries the second part 320. In other words, the first part 310 is mounted on the first shell 210, and the second part 320 is mounted on the second shell 220. Among them, the rotating mechanism 100 is arranged opposite to the foldable part 330. The first shell 210 and the second shell 220 can rotate relative to each other through the rotating mechanism 100, so that the folding device 200 can switch between a folded state and a flattened state.

[0082] 1 , the first housing 210 and the second housing 220 rotate relative to each other via the rotation mechanism 100. As the first housing 210 and the second housing 220 move closer together, the display screen 300 folds, thereby folding the foldable electronic device 1000. When the foldable electronic device 1000 is in the folded state, the foldable portion 330 of the display screen 300 bends, and the first portion 310 and the second portion 320 are positioned relative to each other. At this point, the display screen 300 is positioned between the first housing 210 and the second housing 220, significantly reducing the risk of damage to the display screen 300 and effectively protecting it.

[0083] Referring to Figures 2 and 4 , the first housing 210 and the second housing 220 rotate relative to each other via the rotating mechanism 100. As the first housing 210 and the second housing 220 move away from each other, the display screen 300 unfolds, allowing the foldable electronic device 1000 to unfold to a semi-expanded state. When the foldable electronic device 1000 is in the semi-expanded state, the first housing 210 and the second housing 220 unfold to an angle α, and the first portion 310 and the second portion 320 unfold relative to each other, driving the foldable portion 330 to unfold. At this point, the angle between the first portion 310 and the second portion 320 is α. In this embodiment, α is 90 degrees. In other embodiments, α may also be approximately 90 degrees, or may be 80 degrees, 85 degrees, 95 degrees, or 0 degrees.

[0084] Referring to Figures 3 and 4 , the first housing 210 and the second housing 220 rotate relative to each other via the rotation mechanism 100. As the first and second housings 210, 220 move away from each other, the display screen 300 further unfolds until the foldable electronic device 1000 is flattened. When the folding mechanism 200 is in the flattened state, the angle β between the first and second housings 210, 220 is β. The foldable portion 330 unfolds, with the first and second portions 310, 320 relatively unfolded. At this point, the angles β between the first and second portions 310, 320, and foldable portion 330 are all β. This creates a large display area for the foldable electronic device 1000, enhancing the user experience. In this embodiment, β is 180 degrees. In other embodiments, β may also be approximately 180 degrees, such as 170 degrees, 175 degrees, 185 degrees, or 190 degrees.

[0085] It should be noted that angles α and β are both the angles between the first housing 210 and the second housing 220. These angles are used to distinguish the angles between the first housing 210 and the second housing 220 in different states of the foldable electronic device 1000. Angle α refers to the angle between the first housing 210 and the second housing 220 when the foldable electronic device 1000 is in the semi-expanded state, while angle β refers to the angle between the first housing 210 and the second housing 220 when the foldable electronic device 1000 is in the flattened state.

[0086] Please refer to FIG. 5 and FIG. 6 . FIG. 5 is a schematic structural diagram of the rotating mechanism 100 in the foldable electronic device 1000 shown in FIG. 4 , and FIG. 6 is a schematic exploded structural diagram of the rotating mechanism 100 shown in FIG. 5 .

[0087] For ease of description, this application sets a reference plane P. Reference plane P passes through the center of the rotation mechanism 100 and is perpendicular to the X-direction. It should be understood that the directional terms such as "top" and "bottom" used in the embodiments of this application to describe the rotation mechanism 100 are primarily based on the orientation of the rotation mechanism 100 shown in FIG5 , with the orientation toward the negative Z-axis being "top" and the orientation toward the positive Z-axis being "bottom." These terms do not limit the orientation of the rotation mechanism 100 in actual application scenarios.

[0088] The rotating mechanism 100 includes a base 10, a rotating assembly 1, a synchronization assembly 50, and a pressure plate 40. Both the rotating assembly 1 and the synchronization assembly 50 are mounted on the base 10 and can rotate relative to the base 10. The synchronization assembly 50 is slidably connected to the rotating assembly 1. The pressure plate 40 is mounted on the rotating assembly 1 and is slidably connected to the rotating assembly 1. When the rotating assembly 1 rotates relative to the base 10, it drives the pressure plate 40 and synchronization assembly 50 to rotate relative to the base 10 simultaneously, thereby switching the rotating mechanism 100 between a folded and unfolded state.

[0089] In this embodiment, there are four rotating components 1, namely the first rotating component 101, the second rotating component 102, the third rotating component 103 and the fourth rotating component 104. The first rotating component 101, the second rotating component 102, the third rotating component 103 and the fourth rotating component 104 are arranged in sequence along the Y direction. Among them, the first rotating component 101 is located on the positive side of the Y axis of the base 10, the fourth rotating component 104 is located on the negative side of the Y axis of the base 10, and the second rotating component 102 and the third rotating component 103 are located between the first rotating component 101 and the second rotating component 102. In other embodiments, the rotating components 1 can also be one, two, three or more than five. This application does not specifically limit the number of rotating components 1.

[0090] The first rotating assembly 101 includes a fixed frame 30 and a main swing arm 20. The fixed frame 30 includes a first fixed frame 31 and a second fixed frame 32. The main swing arm 20 includes a first main swing arm 21, a second main swing arm 24, a third main swing arm 27, and a fourth main swing arm 28. The main swing arm 20 is mounted on the base 10 and can slide and rotate relative to the base 10. The first fixed frame 31, the first main swing arm 21, and the third main swing arm 27 are located on one side of the base 10 in the X direction, and the first and third main swing arms 21, 27 are both rotatably connected to the first fixed frame 31. When the first fixed frame 31 rotates relative to the base 10, it drives the first and third main swing arms 21, 27 to slide and rotate relative to the base 10. The second fixed frame 32, the second and fourth main swing arms 24, 28 are located on the other side of the base 10 in the X direction, and the second and fourth main swing arms 24, 28 are both rotatably connected to the second fixed frame 32. When the second fixing frame 32 rotates relative to the base 10 , the second main swing arm 24 and the fourth main swing arm 28 are driven to slide and rotate relative to the base 10 .

[0091] The second rotating assembly 102 and the first rotating assembly 101 can be identical or similar components, symmetrical or partially symmetrical structures, or different structures. In this embodiment, the second rotating assembly 102 has the same structure as the first rotating assembly 101. The second rotating assembly 102 includes a fixed frame 30A and a main swing arm 20A. The fixed frame 30A includes a first fixed frame 31A and a second fixed frame 32A. The main swing arm 20A includes a first main swing arm 21A, a second main swing arm 24A, a third main swing arm 27A, and a fourth main swing arm 28A. The basic structure of each component in the second rotating assembly 102, the connection relationship between the components, and the connection relationship between the components and components outside the assembly can all refer to the relevant design of the first rotating assembly 101. The second rotating assembly 102 and the first rotating assembly 101 can be identical or different in the detailed structure or position arrangement of the components.

[0092] The third rotating assembly 103 and the first rotating assembly 101 can be identical or similar components, symmetrical or partially symmetrical in structure, or different in structure. In this embodiment, the third rotating assembly 103 includes a fixed frame 30B and a main swing arm 20B. The fixed frame 30B includes a first fixed frame 31B and a second fixed frame 32B. The main swing arm 20B includes a first main swing arm 21B and a second main swing arm 24B. The basic structure of each component in the third rotating assembly 103, the connection relationships between components, and the connection relationships between components and components outside the assembly can all refer to the relevant design of the first rotating assembly 101. In this embodiment, the third rotating assembly 103 differs from the first rotating assembly 101 in that the third rotating assembly 103 has two main swing arms 20B. That is, the main swing arms 20B of the third rotating assembly 103 only include the first main swing arm 21B and the second main swing arm 24B, and do not include the third and fourth main swing arms.

[0093] The fourth rotating assembly 104 can be identical or similar to the first rotating assembly 101, with symmetrical or partially symmetrical structures, or different structures. In this embodiment, the fourth rotating assembly 104 includes a fixed frame 30C and a main swing arm 20C. The fixed frame 30C includes a first fixed frame 31C and a second fixed frame 32C. The main swing arm 20C includes a first main swing arm 21C and a second main swing arm 24C. The basic structure of each component in the fourth rotating assembly 104, the connections between components, and the connections between components and components outside the assembly can all refer to the relevant designs of the first rotating assembly 101. The detailed structure and positional arrangement of the components of the fourth rotating assembly 104 can be the same as or different from those of the first rotating assembly 101. In this embodiment, the fourth rotating assembly 104 differs from the first rotating assembly 101 in that the fourth rotating assembly 104 has two main swing arms 20. That is, the main swing arm 20C of the fourth rotating assembly 104 only includes the first main swing arm 21C and the second main swing arm 24C, and does not include the third and fourth main swing arms. Furthermore, the structure of the first main swing arm 21C in the fourth rotating assembly 104 is slightly different from that of the first main swing arm 21 in the first rotating assembly 101 .

[0094] It should be noted that in this embodiment, the first fixing frames and the second fixing frames in the four rotating assemblies 1 are separate structural components, that is, the first fixing frames in the four rotating assemblies 1 are split structures, and the second fixing frames are split structures. In some other embodiments, the first fixing frames in the four rotating assemblies 1 can also be fixedly connected to each other to form a structural component, and the second fixing frames can be fixed to each other to form a structural component. That is, the first fixing frame 31 in the first rotating assembly 101, the first fixing frame 31A of the second rotating assembly 102, the first fixing frame 31B of the third rotating assembly 103, and the first fixing frame 31C of the fourth rotating assembly 104 are fixed to each other and are the same structural component. The second fixing frame 32 in the first rotating assembly 101, the second fixing frame 32B of the second rotating assembly 102, the second fixing frame 32B of the third rotating assembly 103, and the second fixing frame 32C of the fourth rotating assembly 104 are fixed to each other and are the same structural component.

[0095] The pressure plate 40 includes a first pressure plate 41 and a second pressure plate 42. The first pressure plate 41 is mounted on the first fixed frame and is connected to the first fixed frames 31, 31A, 31B, and 31C for simultaneous rotation and sliding. Furthermore, the first pressure plate 41 is connected to the first main swing arms 21, 21A, 21B, and 21C, as well as the third main swing arm 27 for simultaneous sliding and rotation. When the first fixed frames 31, 31A, 31B, and 31C rotate relative to the base 10, the first pressure plate 41 rotates relative to the base 10 and rotates and slides relative to the first fixed frames 31, as well as the first main swing arms 21, 21A, 21B, and 21C. The second pressure plate 42 is mounted on the second fixed frame 32 and is connected to the second fixed frames 32, 32A, 32B, and 32C for simultaneous rotation and sliding. Furthermore, the second pressure plate 42 is connected to the second main swing arms 24, 24A, 24B, and 24C, as well as the fourth main swing arm 28 for simultaneous sliding and rotation. When the second fixing frames 32, 32A, 32B, and 32C rotate relative to the base 10, they drive the second pressure plate 42 to rotate relative to the base 10, rotate and slide relative to the second fixing frames 32, and simultaneously rotate and slide relative to the second main swing arms 24, 24A, 24B, and 24C. It will be appreciated that the main swing arm 20 of this embodiment is connected to both the fixing frames and the pressure plate. The fixing frames 30 and the pressure plate 40 can jointly drive the main swing arm 20 to rotate relative to the base 10. In other words, the main swing arm 20 of this embodiment also serves as a pressure plate swing arm.

[0096] In some other embodiments, the main swing arm 20 may not be connected to the pressure plate 40. The rotation mechanism 100 also includes a pressure plate swing arm. One end of the pressure plate swing arm is mounted on the base 10 and is rotationally connected to the base 10. The other end of the pressure plate swing arm is mounted on the pressure plate 40 and is rotationally and slidingly connected to the pressure plate 40. When the pressure plate 40 rotates relative to the base 10, it drives the pressure plate swing arm to rotate relative to the base 10. In other words, the pressure plate swing arm and the main swing arm 20 are two separate swing arms.

[0097] The synchronization assembly 50 is mounted on the base 10 and is slidably connected to the fixed frame 30. In this embodiment, there are three synchronization assemblies 50. The four synchronization assemblies 50 are respectively a first synchronization assembly 501, a second synchronization assembly 502 and a third synchronization assembly 503. The first synchronization assembly 501 includes a first synchronization swing arm 51, a second synchronization swing arm 52, a synchronization gear 53 and a damping member 60. The first synchronization swing arm 51 and the second synchronization swing arm 52 are respectively arranged on opposite sides of the synchronization gear 53 in the X direction, and are engaged with the synchronization gear 53 and are hinged to the damping member 60. The damping member 60 and the synchronization gear 53 are both mounted on the base 10 and can rotate relative to the base 10. The first synchronization swing arm 51 is located on the same side as the first main swing arm 21, is spaced apart from the first main swing arm 21 and the third main swing arm 27, and is slidably connected to the first fixed frame 31 in the first rotating assembly 101. The second synchronous swing arm 52 is located on the same side as the second main swing arm 24, spaced apart from the second main swing arm 24 and the fourth main swing arm 28, and is slidably connected to the second fixed bracket 32 ​​of the first rotating assembly 101. When the first rotating assembly 101 rotates relative to the base 10, it drives the first synchronous swing arm 51 to rotate, thereby driving the synchronous gear 53 to rotate, and in turn, the second synchronous swing arm 52 to rotate, thereby achieving synchronized rotation of the rotating mechanism 100. Simultaneously, when the first and second synchronous swing arms 51 and 52 rotate relative to the base 10, they abut the damping element 60, generating an elastic force that in turn acts on the first and second synchronous swing arms 51 and 52, thereby providing a damping force for the rotating mechanism 100 and a damping feel for the user.

[0098] The second and third synchronized assemblies 502 and 503 may be identical or similar components, symmetrical or partially symmetrical structures, or different structures from the first synchronized assembly 501. In this embodiment, the structure of the second synchronized assembly 502 is mirror-symmetrical to that of the first synchronized assembly 501. The second synchronized assembly 502 is mounted on the base 10 and is slidably connected to the fixed frame 30A in the second rotating assembly 102. The structure of the third synchronized assembly 503 is mirror-symmetrical to that of the first synchronized assembly 501. The third synchronized assembly 503 is mounted on the base 10 and is slidably connected to the fixed frame 30C in the fourth rotating assembly 104.

[0099] It can be understood that the synchronization swing arms in the first synchronization assembly 501, the second synchronization assembly 502 and the third synchronization assembly 503 also serve as damping swing arms. When the damping member 60 acts on the synchronization swing arms, the synchronization swing arms have a damping force.

[0100] In this embodiment, the rotation mechanism 100 further includes an auxiliary damping assembly 70. The auxiliary damping assembly 70 includes an auxiliary damping member 71, a first damping swing arm 72, and a second damping swing arm 73. The auxiliary damping member 71 has the same or similar structure as the damping member 60. The auxiliary damping member 71 is mounted on the base 10. The first damping swing arm 72 and the second damping swing arm 73 are respectively disposed on opposite sides of the auxiliary damping member 71 in the X-direction and are hingedly connected to the auxiliary damping member 71. The first damping swing arm 72 is slidably connected to the first fixed frame 31B in the third rotation assembly 103. The second damping swing arm 73 is slidably connected to the second fixed frame 32B in the third rotation assembly 103. When the first fixed frame 31B rotates relative to the base 10, it drives the first damping swing arm 72 to rotate relative to the base 10 and abuts against the auxiliary damping member 71, causing the auxiliary damping member 71 to generate an elastic force, which in turn acts on the first damping swing arm 72. When the second fixing frame 32B rotates relative to the base 10, it drives the second damping swing arm 73 to rotate relative to the base 10 and abuts against the auxiliary damping member 71, causing the auxiliary damping member 71 to generate elastic force, which in turn acts on the second damping swing arm 73, thereby further providing damping force for the rotating mechanism 100.

[0101] Please refer to FIG. 7 , which is a partial structural diagram of the base 10 in the rotating mechanism 100 shown in FIG. 5 .

[0102] The base 10 is in the shape of an elongated strip. The length direction of the base 10 is parallel to the Y direction. The base 10 includes a shaft cover 11, a bracket 12, and a support plate 13. The shaft cover 11, the bracket 12, and the support plate 13 are stacked in sequence and fixedly connected to each other. The shaft cover 11 includes an outer surface 111 and an inner surface 112. The outer surface 111 and the inner surface 112 are arranged opposite to each other and are respectively located on opposite sides of the shaft cover 11 in the thickness direction (Z direction).

[0103] The bracket 12 includes a plate body 121 and a stopper 123. The stopper 123 includes a first stopper 124 and a second stopper 125. In this embodiment, there are multiple first stoppers 124 and second stoppers 125. Multiple first stoppers 124 are arranged at intervals along the Y direction on one side of the plate body 121 in the X direction. Multiple second stoppers 125 are arranged at intervals along the Y direction on the other side of the plate body 121 in the X direction. In this embodiment, the bracket 12 includes multiple sub-brackets 12. Multiple sub-brackets 12 are arranged at intervals along the Y direction on the inner surface 112 of the shaft cover 11 and are fixedly connected to the shaft cover 11. In other embodiments, the bracket 12 may also be an integrated structure.

[0104] The support plate 13 is a long, plate-like structure. The support plate 13 includes a support plate body 14 and a guide rail portion 17. The guide rail portion 17 is fixedly connected to the support plate body 14. The guide rail portion 17 is used to mount the main swing arm 20 so that the main swing arm 20 slides and rotates along the guide rail portion 17.

[0105] The support plate body 14 includes a top surface 141, a bottom surface 142, a first side surface 143 and a second side surface 144. The top surface 141 and the bottom surface 142 are arranged opposite to each other and are respectively located on opposite sides of the Z direction. The first side surface 143 and the second side surface 144 are arranged opposite to each other and are respectively located on opposite sides of the X direction, and are connected between the top surface 141 and the bottom surface 142. The top surface 141 is provided with an avoidance groove 145. The avoidance groove 145 is formed by the first side surface 143 and the second side surface 144 being bent and recessed toward the center of the top surface 141 in the X direction. The avoidance groove 145 is used to avoid the display screen 300. When the foldable electronic device 1000 is in a folded state, the bent portion of the display screen 300 is at least partially located in the avoidance groove 145 to avoid undesirable phenomena such as creases when the display screen 300 is bent, which helps to extend the service life of the display screen 300.

[0106] The support plate body 14 is provided with a first notch 15 and a second notch 16. The first notch 15 and the second notch 16 are spaced apart and arranged opposite to each other along the X direction. The first notch 15 is provided on the first side surface 143 and passes through the top surface 141 and the bottom surface 142. The first notch 15 includes a first inner wall 151 and two second inner walls 154. The two second inner walls 154 are arranged opposite to each other along the Y direction, and the first inner wall 151 is connected between the two second inner walls 154. The first inner wall 151 includes a first curved surface 152 and a first stop surface 153. The first curved surface 152 includes two sub-curved surfaces. The two sub-curved surfaces are respectively located on opposite sides of the first inner wall 151 in the Y direction. The first stop surface 153 is located between the two sub-curved surfaces of the first curved surface 152. The first stop surface 153 faces the first side surface 143. The first stop surface 153 is a plane, and the plane where the first stop surface 153 is located intersects with the X direction. In this embodiment, the first stop surface 153 is perpendicular to the X direction. The first stop surface 153 is used for stopping with the first main swing arm 21 .

[0107] The second notch 16 is symmetrically arranged with respect to the first notch 15 relative to the reference plane P. The second notch 16 is arranged on the second side surface 144 and passes through the top surface 141 and the bottom surface 142. The second notch 16 includes a third inner wall 161 and two fourth inner walls 164. The two fourth inner walls 164 are arranged opposite to each other along the Y direction, and the third inner wall 161 is connected between the two fourth inner walls 164. The third inner wall 161 includes a second arc surface 162 and a third stop surface 163. The third stop surface 163 is located between the two sub-arc surfaces of the second arc surface 162. The third stop surface 163 faces the second side surface 144. The third stop surface 163 is a plane, and the plane where the third stop surface 163 is located intersects with the X direction. In this embodiment, the third stop surface 163 is perpendicular to the X direction. The third stop surface 163 is used to stop with the second main swing arm 24.

[0108] The guide rail portion 17 includes a first slide rail 171 and a first guide rail 172. The first slide rail 171 and the first guide rail 172 are both arranged on the inner wall of the first notch 15. In this embodiment, there are two first slide rails 171. Each first slide rail 171 is fixed to a second inner wall 154 and extends toward the first notch 15. The two first slide rails 171 are opposite and spaced apart along the Y direction. The top surface of the first slide rail 171 is flush with the top surface 141 and is used to jointly support the display screen 300. The bottom surface of the first slide rail 171 is arc-shaped and is used to cooperate with the first main swing arm 21. One end of the first guide rail 172 is fixedly connected to the first inner wall 151, and the other end extends toward the first side surface 143. In addition, the first stop surface 153 is located on opposite sides of the first guide rail 172. The top surface of the first guide rail 172 is arc-shaped and is used to cooperate with the first main swing arm 21.

[0109] The guide rail portion 17 also includes a second guide rail 173 and a second guide rail 174. The second guide rail 173 and the second guide rail 174 are both arranged on the inner wall of the second notch 16. In this embodiment, there are two second guide rails 173. One second guide rail 173 is fixed to a fourth inner wall 164 and extends toward the second notch 16. The two second guide rails 173 are opposite and spaced apart along the Y direction. The top surface of the second guide rail 173 is flush with the top surface 141, and they are jointly used to support the display screen 300. The bottom surface of the second guide rail 173 is arc-shaped, and is used to cooperate with the second main swing arm 24. One end of the second guide rail 174 is fixedly connected to the third inner wall 161, and the other end extends toward the second side surface 144. The top surface 141 of the second guide rail 174 is arc-shaped, and is used to cooperate with the second main swing arm 24.

[0110] The support plate body 14 is further provided with a first mounting opening 146, a second mounting opening 147, a third notch 148, and a fourth notch 149. The first mounting opening 146 and the second mounting opening 147 are symmetrically arranged relative to the reference plane P. The third notch 148 and the fourth notch 149 are symmetrically arranged relative to the reference plane P. Furthermore, the first mounting opening 146, the third notch 148, and the first notch 15 are arranged side by side and spaced apart along the Y direction, while the second mounting opening 147, the fourth notch 149, and the second notch 16 are arranged side by side and spaced apart along the Y direction. The structure of the third notch 148 is consistent with that of the first notch 15, and the structure of the fourth notch 149 is consistent with that of the second notch 16. The first mounting opening 146 is used to mount the first synchronous swing arm 51, and the second mounting opening 147 is used to mount the second synchronous swing arm 52.

[0111] The guide rail portion 17 further includes a third guide rail 175, a fourth guide rail 176, a third guide rail 177, and a fourth guide rail 178. The structure of the third guide rail 175 is consistent with that of the first guide rail 171. The structure of the third guide rail 177 is consistent with that of the first guide rail 172. The third guide rails 175 and 177 are fixed to the inner wall of the third notch 148. The structure of the fourth guide rail 176 is consistent with that of the second guide rail 173. The structure of the fourth guide rail 178 is consistent with that of the second guide rail 174. The fourth guide rails 176 and 178 are fixed to the inner wall of the fourth notch 149.

[0112] The bracket 12 is mounted on the inner surface 112 of the shaft cover 11. The three sub-brackets 12 of the bracket 12 are arranged side by side and at intervals along the Y direction. The support plate 13 is mounted on the side of the bracket 12 facing away from the shaft cover 11 and is clamped between the first stopper 124 and the second stopper 125. The stopper 123 fixes the support plate 13 and can improve the structural stability of the support plate 13. The base 10 also includes a plurality of bolts. The bolts pass through the support plate 13 and the bracket 12 and are fixedly connected to the shaft cover 11, thereby achieving a fixed connection between the support plate 13, the bracket 12 and the shaft cover 11.

[0113] It will be understood that the inner wall of the first notch 15 and the first sub-bracket 12 together form a first rotation groove, and the first stop surface 153 is located within the first rotation groove. The first rotation groove is used to mount the first main swing arm 21, and the first main swing arm 21 can rotate and slide within the first rotation groove. The inner wall of the second notch 16 and the first sub-bracket 12 together form a second rotation groove, and the third stop surface 163 is located within the second rotation groove. The second rotation groove is used to mount the second main swing arm 24, and the second main swing arm 24 can rotate and slide within the second rotation groove. The first rotation groove and the second rotation groove are arranged opposite each other along the width direction (X direction) of the base 10. The inner wall of the third notch 148 and the third sub-bracket 12 together form a third rotation groove, which is used to mount the third main swing arm 27. The inner wall of the fourth notch 149 and the third sub-bracket 12 together form a fourth rotation groove, which is used to mount the fourth main swing arm 28.

[0114] It should be noted that Figure 7 only shows the partial structure of the base 10 in the positive direction of the Y-axis. The structure of the base 10 in the negative direction of the Y-axis is the same as or similar to the structure in the positive direction of the Y-axis, and the structure of the base 10 in the negative direction of the Y-axis can be appropriately adjusted according to the structures of the second rotating component 102, the third rotating component 103 and the fourth rotating member.

[0115] Please refer to FIG8 and FIG9 . FIG8 is an enlarged structural diagram of the main swing arm 20 in the rotating mechanism 100 shown in FIG6 , and FIG9 is a structural diagram of the main swing arm 20 in FIG8 at another angle.

[0116] The main swing arm 20 includes a first main swing arm 21 and a second main swing arm 24. The first main swing arm 21 includes a first rotating body 22, a first swinging body 212 and a first shaft seat 211. The first shaft seat 211 is provided with a shaft hole. The extension direction of the shaft hole of the first shaft seat 211 is parallel to the Y direction. The first shaft seat 211 is used for rotationally connecting with the first main swing arm 21. The first swinging body 212 is in the shape of a flat plate. The first swinging body 212 is provided with a first rotating hole 213. The first rotating hole 213 passes through the first main swing arm 21 in the width direction (Y direction) of the first main swing arm 21. The direction along the first rotating hole 213 is parallel to the Y direction. That is, the extension direction of the first rotating hole 213 is consistent with the extension direction of the first shaft seat 211. The first swinging body 212 is fixedly connected between the first shaft seat 211 and the first rotating body 22.

[0117] The first rotating body 22 includes a first end 221 and a second end 222. The first end 221 and the second end 222 are disposed opposite each other and located on opposite sides in the X-direction. The second end 222 of the first rotating body 22 is fixedly connected to the end of the first swinging body 212 facing away from the first shaft seat 211. The first rotating body 22 includes a first supporting surface 223 and a first rotating surface 224. The first rotating surface 224 and the first supporting surface 223 are disposed opposite each other along the thickness direction of the first main swing arm 21. The first rotating surface 224 is a curved surface for mounting within the first rotating groove. The first supporting surface 223 is a flat surface. When the first main swing arm 21 is extended relative to the base 10, the first supporting surface 223 and the top surface 141 of the support plate 13 are substantially flush with each other, thereby jointly supporting the display screen 300. The first supporting surface 223 is provided with first arcuate grooves 225 on opposite sides in the Y-direction. The first arcuate grooves 225 are configured for sliding engagement with the first slide rail 171.

[0118] The first rotating body 22 also has a first groove 227 and a first avoidance hole 226. The opening of the first groove 227 is located on the first rotating surface 224 and extends through the first end 221. The first groove 227 includes a first bottom wall 2271 and two first side walls 2272. The two first side walls 2272 are arranged opposite each other along the Y direction and are fixedly connected to the first bottom wall 2271. The first bottom wall 2271 is arc-shaped and is used for sliding connection with the first guide rail 172. The first side walls 2272 have a step structure. The first main swing arm 21 also includes a second stop surface 23. The second stop surface 23 is located at the step structure of the first side surface 143. The second stop surface 23 faces the first end 221. The second stop surface 23 is the step surface of the step structure provided on the first side wall 2272. The plane on which the second stop surface 23 is located intersects with the X direction. The second stop surface 23 is used to stop with the first stop surface 153. In this embodiment, the second stop surface 23 is perpendicular to the X direction. In other embodiments, the angle between the second stop surface 23 and the X-direction may be slightly greater than or less than 90 degrees. The first avoidance hole 226 is provided on the first bottom wall 2271 and penetrates the first rotating body 22 in the thickness direction of the first rotating body 22. The first avoidance hole 226 is used to avoid the first guide rail 172.

[0119] The second main swing arm 24 has the same structure as the first main swing arm 21. The second main swing arm 24 includes a second rotating body 25, a second swinging body 242, and a second shaft seat 241. The second swinging body 242 is provided with a second rotation hole 243. The second swinging body 242 is fixedly connected between the second shaft seat 241 and the second rotating body 25. The second rotating body 25 includes a third end 251 and a fourth end 252. The fourth end 252 is fixedly connected to the end of the second swinging body 242 facing away from the second shaft seat 241.

[0120] The second rotating body 25 includes a second supporting surface 253 and a second rotating surface 254. When the second main swing arm 24 is deployed relative to the base 10, the second supporting surface 253 and the top surface 141 of the support plate 13 are approximately coplanar, and are used to jointly support the display screen 300. The second supporting surface 253 is provided with a second arcuate groove 255, a second groove 257, and a second avoidance hole 256. The second arcuate groove 255 is used for sliding connection with the second guide rail 173. The opening of the second groove 257 is located on the second rotating surface 254 and extends through the third end 251. The second groove 257 includes a second bottom wall 2571 and two second side walls 2572. The second bottom wall 2571 is used for sliding connection with the second guide rail 174. The second side walls 2572 are provided with a step structure. The second main swing arm 24 also includes a fourth stop surface 26. The fourth stop surface 26 is located at the step structure of the second side wall 2572. The fourth stop surface 26 faces the third end 251. The fourth stop surface 26 is a step surface of the step structure provided on the second side wall 2572. The fourth stop surface 26 is used to stop with the third stop surface 163.

[0121] Please refer to FIG. 6 . The structure of the third main swing arm 27 is the same as that of the first main swing arm 21 . The structure of the fourth main swing arm 28 is the same as that of the second main swing arm 24 . Detailed description thereof will be omitted here.

[0122] Please refer to Figures 10 and 11. Figure 10 is a schematic diagram of a portion of the structure of the rotating mechanism 100 shown in Figure 5, and Figure 11 is a schematic diagram of the cross-sectional structure of the rotating mechanism 100 shown in Figure 10 along the AA direction. In the drawings of this application, "cut along AA" means cut along line AA and the planes indicated by the arrows at both ends of line AA. The following description of the drawings should be understood in the same way.

[0123] The first main swing arm 21 and the second main swing arm 24 are both mounted on the base 10 and are respectively located on opposite sides of the base 10 on the X-axis. The first rotating body 22 of the first main swing arm 21 is mounted in the first rotating groove. The first rotating surface 224 faces the bracket 12. The first slide rail 171 is located in the first arcuate groove 225, and the bottom surface of the first slide rail 171 is opposite to and in contact with the bottom wall of the first arcuate groove 225. The first guide rail 172 is located in the first groove 227, and the top surface of the first guide rail 172 is opposite to and in contact with the first bottom wall 2271 of the first groove 227. The two opposite side walls of the first guide rail 172 in the Y direction are respectively opposite to the two opposite first side walls 2272 of the first groove 227. When the first main swing arm 21 rotates relative to the base 10, the first rotating body 22 can slide and rotate in the first rotating groove along the extension direction of the first slide rail 171 and the first guide rail 172.

[0124] The second rotating body 25 of the second main swing arm 24 is installed in the second rotating groove. The second rotating surface 254 faces the bracket 12. The second slide rail 173 is located in the second arc-shaped groove 255, and the bottom surface of the second slide rail 173 is opposite to and in contact with the bottom wall of the second arc-shaped groove 255. The second guide rail 174 is located in the second groove 257, and the top surface 141 of the second guide rail 174 is opposite to and in contact with the second bottom wall 2571 of the second groove 257. The two opposite side walls of the second guide rail 174 in the Y direction are respectively opposite to the two opposite second side walls 2572 of the second groove 257. When the second main swing arm 24 rotates relative to the base 10, the second rotating body 25 can slide and rotate in the second rotating groove along the extension direction of the second slide rail 173 and the second guide rail 174.

[0125] The first main swing arm 21 and the second main swing arm 24 rotate in opposite directions relative to the base 10. For example, when the rotating mechanism 100 switches from the folded state to the flattened state, the first main swing arm 21 rotates in the second direction, and the second main swing arm 24 rotates in the first direction. When the rotating mechanism 100 switches from the flattened state to the folded state, the first main swing arm 21 rotates in the first direction, and the second main swing arm 24 rotates in the second direction. The first direction is opposite to the second direction. In this embodiment, the first direction is counterclockwise, and the second direction is clockwise.

[0126] When the rotating mechanism 100 switches from the folded state to the flattened state, the first main swing arm 21 rotates clockwise, the first rotating surface 224 slides along the first arc surface 152 toward the direction close to the first rotating groove, the bottom wall of the first arc groove 225 slides along the bottom surface of the first slide rail 171 toward the direction close to the first rotating groove, the first bottom wall 2271 of the first groove 227 slides along the top surface of the first guide rail 172 toward the direction close to the first rotating groove, and the second stop surface 23 moves toward the first stop surface 153 and stops with each other. The second main swing arm 24 rotates counterclockwise, the second rotating surface 254 slides along the second arc surface 162 toward the second rotating groove, the bottom wall of the second arc groove 255 slides along the bottom surface of the second slide rail 173 toward the second rotating groove, the second bottom wall 2571 of the second groove 257 slides along the top surface 141 of the second guide rail 174 toward the second rotating groove, and the fourth stop surface 26 moves toward the third stop surface 163 and stops each other, so that the rotating mechanism 100 is in a flattened state.

[0127] When the rotating mechanism 100 is in the flattened state, the first main swing arm 21 and the second main swing arm 24 are unfolded relative to the base 10. The end of the first guide rail 172 facing away from the first inner wall 151 is located in the first avoidance hole 226, and the end of the second guide rail 174 facing away from the third inner wall 161 is located in the second avoidance hole 256. The first support surface 223, the second support surface 253, and the top surface 141 of the support plate 13 are approximately coplanar and collectively serve to support the display screen 300. The second stop surface 23 is opposite to the first stop surface 153 and interlocks with each other. The second stop surface 23 and the first stop surface 153 can either directly contact or abut against each other. The fourth stop surface 26 is opposite to the third stop surface 163 and interlocks with each other. The fourth stop surface 26 and the third stop surface 163 can either directly contact or abut against each other.

[0128] When the rotating mechanism 100 switches from the flattened state to the folded state, the first main swing arm 21 rotates counterclockwise, the first rotating body 22 rotates and slides along the first slide rail 171 and the first guide rail 172 away from the first rotation groove, and the second stop surface 23 moves away from the first stop surface 153 and unlocks from the first stop surface 153. The second main swing arm 24 rotates clockwise, the second rotating body 25 rotates and slides along the second slide rail 173 and the second guide rail 174 away from the second rotation groove, and the fourth stop surface 26 moves away from the third stop surface 163 and unlocks from the third stop surface 163. The first main swing arm 21 and the second main swing arm 24 fold relative to each other, thereby placing the rotating mechanism 100 in the folded state.

[0129] It should be noted that when the rotating mechanism 100 is in the flattened state, the user will apply a force toward the base 10 to the main swing arm 20 during use. This force causes the main swing arm 20 to have a tendency to move toward the base 10 along the width direction (X direction) of the base 10. This tendency is the virtual position when the rotating mechanism 100 is in the flattened state. When the main swing arm 20 still has room to move toward the base 10, the main swing arm 20 will continue to move toward the base 10 along the X direction. In other words, the rotating mechanism 100 has a large virtual position, which will affect the user's experience. In addition, after the main swing arm 20 continues to move toward the base 10 along the X direction, it will squeeze the display screen 300, causing redundancy and reverse arching on the display screen 300, which may cause damage to the display screen 300. The "redundancy" mentioned here refers to the phenomenon of wrinkles when the display screen 300 is squeezed toward the center from opposite sides along the X direction. "Reverse arching" refers to the bending of the display screen 300 away from the base 10.

[0130] In this embodiment, by providing a first stop surface 153 on the first rotation groove and a second stop surface 23 on the first main swing arm 21, when the rotation mechanism 100 is in the flattened state, the second stop surface 23 and the first stop surface 153 abut against each other. This prevents the first main swing arm 21 from moving along the X-direction toward the base 10 when the rotation mechanism 100 is in the flattened state. In other words, the first main swing arm 21 and the base 10 are stopped in the X-direction, thereby reducing or even eliminating the gap between the rotation mechanism 100 and the base 10, improving the user experience. Furthermore, this prevents redundancy and bulging of the display screen 300, thereby increasing the service life of the display screen 300. Furthermore, when the rotation mechanism 100 is in the flattened state, the first main swing arm 21 and the base 10 are also stopped in the clockwise direction, thereby preventing further clockwise rotation of the first main swing arm 21 and preventing the foldable electronic device 1000 from over-expanding and damaging the display screen 300.

[0131] Moreover, in the present embodiment, by providing a third stop surface 163 in the second rotation groove and a fourth stop surface 26 in the second main swing arm 24, when the rotation mechanism 100 is in the flattened state, the fourth stop surface 26 and the third stop surface 163 abut against each other, so that when the rotation mechanism 100 is in the flattened state, the second main swing arm 24 cannot move along the X direction toward the base 10, thereby further reducing or even avoiding the virtual position of the rotation mechanism 100 in the flattened state, thereby improving the user experience.

[0132] In this embodiment, the directions of the first stop surface 153, the second stop surface 23, the third stop surface 163, and the fourth stop surface 26 are all perpendicular to the X-direction. The directions of the abutting force between the first stop surface 153 and the second stop surface 23, as well as the abutting force between the third stop surface 163 and the fourth stop surface 26, are all parallel or substantially parallel to the direction in which the user squeezes the virtual stop. In other words, the direction of the stopping force applied to the rotation mechanism 100 is parallel to the direction in which the user squeezes the virtual stop when using the foldable electronic device 1000. This improves the stopping accuracy of the rotation mechanism 100 and enhances the user experience. Furthermore, the rotation mechanism 100 in this embodiment achieves stopping through abutment between surfaces, which increases the stopping area, thereby further improving the stopping accuracy of the rotation structure and, in turn, enhancing the user experience.

[0133] Furthermore, in this embodiment, the squeezing force applied by the user to the rotation mechanism 100 can be transferred to the first stop surface 153 and the third stop surface 163. The reaction force of the base 10 on the first main swing arm 21 is located at the second stop surface 23, and the reaction force on the second main swing arm 24 is located at the fourth stop surface 26. This avoids the weak areas of the main swing arm 20, thereby optimizing the force applied to the main swing arm 20 and preventing damage to the main swing arm 20 caused by the force applied by the base 10, thereby improving the reliability and service life of the rotation mechanism 100.

[0134] Furthermore, in this embodiment, by providing a first guide rail 172 on the base 10, providing a first groove 227 on the first main swing arm 21, and installing the first guide rail 172 within the first groove 227, the first main swing arm 21 can rotate relative to the base 10 along the first guide rail 172, thereby improving the rotational stability of the first main swing arm 21 and preventing the first main swing arm 21 from deviating from the preset path during rotation, thereby improving the stopping effect and stopping accuracy between the second stop surface 23 and the first stop surface 153. By providing a second guide rail 174 on the base 10, providing a second groove 257 on the second main swing arm 24, and installing the second guide rail 174 within the second groove 257, the second main swing arm 24 can rotate relative to the base 10 along the second guide rail 174, thereby improving the rotational stability of the second main swing arm 24 and preventing the second main swing arm 24 from deviating from the preset path during rotation, thereby improving the stopping effect and stopping accuracy between the fourth stop surface 26 and the third stop surface 163.

[0135] In one embodiment, when the rotating mechanism 100 is in a flattened state, the first stop surface 153 and the second stop surface 23 have an interference fit. The interference between the first stop surface 153 and the second stop surface 23 is 0 to 0.1 mm. In some embodiments, the interference between the first stop surface 153 and the second stop surface 23 is 0 to 0.04 mm. The "interference fit" mentioned here means that the first stop surface 153 and the second stop surface 23 abut and squeeze each other. The deformation caused by the difference in squeezing between the first stop surface 153 and the second stop surface 23 is the interference. The "interference" here is the sum of the deformation of the first stop surface 153 and the deformation of the second stop surface 23. In this embodiment, by interference fitting the first stop surface 153 and the second stop surface 23, a compression fit between the first stop surface 153 and the second stop surface 23 can be achieved, thereby further preventing the first main swing arm 21 from moving along the X direction toward the base 10, and further improving the stopping accuracy of the rotating mechanism 100, reducing the virtual position of the rotating mechanism 100 in the flattened state, improving the reliability of the display screen 300 of the foldable electronic device 1000, and improving the user experience.

[0136] When the rotating mechanism 100 is in the flattened state, the third stop surface 163 and the fourth stop surface 26 have an interference fit. The interference between the third stop surface 163 and the fourth stop surface 26 is 0 to 0.1 mm. In some embodiments, the interference between the third stop surface 163 and the fourth stop surface 26 is 0 to 0.04 mm. The "interference" here refers to the sum of the deformation of the third stop surface 163 and the deformation of the fourth stop surface 26. In this embodiment, by having the third stop surface 163 and the fourth stop surface 26 have an interference fit, a press fit between the third stop surface 163 and the fourth stop surface 26 can be achieved, thereby further preventing the second main swing arm 24 from moving along the X direction toward the base 10, thereby further reducing the virtual position of the rotating mechanism 100 in the flattened state and improving the user experience.

[0137] In one embodiment, the rotating mechanism 100 includes a wear-resistant layer. The wear-resistant layer can be a metal material or a polymer material. Exemplarily, the wear-resistant layer is polytetrafluoroethylene. In this embodiment, the first stop surface 153, the second stop surface 23, the third stop surface 163 and the fourth stop surface 26 are all provided with a wear-resistant layer. The wear-resistant layer is formed by a physical vapor deposition method. In other embodiments, the wear-resistant layer can also be formed by other coating processes. In this embodiment, by providing a wear-resistant layer on the stop surface, the wear resistance of the stop surface can be improved, thereby improving the stopping effect between the first stop surface 153 and the second stop surface 23, and the stopping effect between the third stop surface 163 and the fourth stop surface 26, thereby improving the service life of the rotating mechanism 100 and improving the stopping accuracy of the rotating mechanism 100 throughout its life.

[0138] In some other embodiments, the wear-resistant layer may be provided on one of the first stop surface 153, the second stop surface 23, the third stop surface 163, and the fourth stop surface 26. Alternatively, the wear-resistant layer may be provided on two or three of the first stop surface 153, the second stop surface 23, the third stop surface 163, and the fourth stop surface 26.

[0139] Please refer to Figures 12, 13 and 14. Figure 12 is a partial structural schematic diagram of the rotating mechanism 100 shown in Figure 5 in the second embodiment, Figure 13 is a structural schematic diagram of the bracket 12 in the rotating mechanism 100 shown in Figure 12, and Figure 14 is a decomposed structural schematic diagram of the bracket 12 shown in Figure 13 at another angle.

[0140] The base 10 in the rotating mechanism 100 shown in this embodiment is different from the base 10 shown in FIG. 7 in that:

[0141] In this embodiment, the first stop surface 153 of the support plate 13 is located between the two sub-arc surfaces of the first arc surface 152 and faces the first side surface 143. The first stop surface 153 and the first guide rail 172 are arranged side by side along the Z-axis, and the first stop surface 153 is located on the positive Z-axis side of the first guide rail 172. The top surface of the first guide rail 172 is flat and flush with the top surface 141 of the bracket 12, and is used to jointly support the display screen 300. The bottom surface of the first guide rail 172 is curved and is used to cooperate with the first main swing arm 21. In addition, the bottom surface of the first guide rail 172 is connected to the first stop surface 153. The bottom surface of the first slide rail 171 is flat and flush with the bottom surface 142 of the bracket 12. Alternatively, there can be a small height difference between the bottom surface of the first slide rail 171 and the bottom surface 142 of the support plate 13. The top surface of the first slide rail 171 is curved and forms the first slide groove 131. The first sliding groove 131 is used for installing the first main swing arm 21 .

[0142] The third stop surface 163 is located between the two sub-arc surfaces of the second arc surface 162 and faces the second side surface 144. The third stop surface 163 and the second guide rail 174 are arranged side by side along the Z direction, and the third stop surface 163 is located on the positive Z-axis side of the second guide rail 174. The top surface of the second guide rail 174 is a plane and is flush with the top surface 141 of the bracket 12, and is used to jointly support the display screen 300. The bottom surface of the second guide rail 174 is arc-shaped, and is used to cooperate with the second main swing arm 24. In addition, the bottom surface of the second guide rail 174 is connected to the third stop surface 163. The bottom surface of the second slide rail 173 is a plane and is flush with the bottom surface 142 of the bracket 12. The top surface of the second slide rail 173 is arc-shaped and forms a second sliding groove 132. The second sliding groove 132 is used to install the second main swing arm 24.

[0143] Please refer to Figures 15 and 16. Figure 15 is an enlarged structural schematic diagram of the main swing arm 20 in the rotating mechanism 100 shown in Figure 12, and Figure 16 is an enlarged structural schematic diagram of the main swing arm 20 shown in Figure 15 at another angle.

[0144] The main swing arm 20 in the rotating mechanism 100 shown in this embodiment is different from the main swing arm 20 shown in FIG. 8 in that:

[0145] In this embodiment, the first main swing arm 21 also includes a first slider 214. Two first sliders 214 are fixed to opposite sides of the first rotating body 22 along the Y direction. The top surface of the first slider 214 is flush with the first support surface 223, and they are used to jointly support the display screen 300. The bottom surface of the first slider 214 is curved, and is used to cooperate with the first slide rail 171. The first end 221 is provided with a first clearance notch 228. The first clearance notch 228 extends through the first support surface 223 and the first rotating surface 224. A second stop surface 23 is provided on the bottom surface of the first clearance notch 228 and faces the first end 221. In this embodiment, the second stop surface 23 is perpendicular to the X direction. In other embodiments, the angle between the second stop surface 23 and the X direction may be slightly greater than or slightly less than 90 degrees. It is understood that the second stop surface 23 is the bottom wall surface of the first clearance notch 228. The second stop surface 23 is used to stop against the first stop surface 153. The first rotating body 22 is provided with a first groove 227. The opening of the first groove 227 is located on the first supporting surface 223 and communicates with the first avoidance notch 228. The first bottom wall 2271 of the first groove 227 is arc-shaped and connected to the second stop surface 23. The first groove 227 is used to mount the first guide rail 172.

[0146] In this embodiment, the second main swing arm 24 also includes two second sliders 244. The two second sliders 244 are respectively fixed to opposite sides of the second rotating body 25 along the Y direction. The top surface of the second slider 244 is flush with the second support surface 253, and they are used to jointly support the display screen 300. The bottom surface of the second slider 244 is curved, and is used to cooperate with the second slide rail 173. The third end 251 is provided with a second avoidance notch 258. The second avoidance notch 258 passes through the second support surface 253 and the second rotating surface 254. The second avoidance notch 258 includes a fourth stop surface 26. The fourth stop surface 26 faces the third end 251. The fourth stop surface 26 is used to stop with the third stop surface 163. The second rotating body 25 is provided with a second groove 257. The opening of the second groove 257 is located on the second support surface 253 and is connected to the second avoidance notch 258. The second bottom wall 2571 of the second groove 257 is curved. The second bottom wall 2571 is connected to the fourth stop surface 26. The second groove 257 is used for mounting the second guide rail 174 .

[0147] Please refer to FIG. 17 , which is a schematic cross-sectional view of the rotating mechanism 100 shown in FIG. 12 along the BB direction.

[0148] The first main swing arm 21 and the second main swing arm 24 are both mounted on the base 10 and are respectively located on opposite sides of the base 10 on the X-axis. Among them, the first rotating body 22 of the first main swing arm 21 is mounted in the first rotating groove. The first rotating surface 224 faces the first inner wall 151 and can slide along the first arc surface 152 of the first inner wall 151. The first slider 214 is located in the first sliding groove 131 and can slide along the first sliding groove 131. The first guide rail 172 is located in the first groove 227, and the bottom surface of the first guide rail 172 is opposite to and in contact with the first bottom wall 2271 of the first groove 227. When the first main swing arm 21 rotates relative to the base 10, the first rotating body 22 can slide and rotate in the first rotating groove along the extension direction of the first slide rail 171 and the first guide rail 172.

[0149] The second rotating body 25 of the second main swing arm 24 is mounted in the second rotating groove. The second rotating surface 254 faces the third inner wall 161 and can slide along the second curved surface 162 of the third inner wall 161. The second slider 244 is located in the second sliding groove 132 and can slide along the second sliding groove 132. The second guide rail 174 is located in the second groove 257, and the bottom surface of the second guide rail 174 is opposite to and in contact with the second bottom wall 2571 of the second groove 257. When the second main swing arm 24 rotates relative to the base 10, the second rotating body 25 can slide and rotate in the second rotating groove along the extension direction of the second slide rail 173 and the second guide rail 174.

[0150] When the rotating mechanism 100 switches from the folded state to the flattened state, the first main swing arm 21 rotates clockwise, the first rotating surface 224 slides along the first arc surface 152 toward the direction close to the first rotating groove, the first slider 214 slides along the first sliding groove 131 toward the direction close to the first rotating groove, the first bottom wall 2271 of the first groove 227 slides along the bottom surface of the first guide rail 172 toward the direction close to the first guide rail 172, and the second stop surface 23 moves toward the first stop surface 153 and stops with the first stop surface 153. The second main swing arm 24 rotates counterclockwise, the second rotating surface 254 slides along the second arc surface 162 toward the second rotating groove, the second slider 244 slides along the second sliding groove 132 toward the second rotating groove, the second bottom wall 2571 of the second groove 257 slides along the bottom surface of the second guide rail 174 toward the second guide rail 174, the fourth stop surface 26 moves toward the third stop surface 163, and stops with the third stop surface 163, so that the rotating mechanism 100 is in a flattened state.

[0151] When the rotating mechanism 100 is in the flattened state, the first main swing arm 21 and the second main swing arm 24 are relatively extended, the first slider 214 is located in the first sliding groove 131, the first guide rail 172 is located in the first groove 227, the second slider 244 is located in the first sliding groove 131, and the second guide rail 174 is located in the second groove 257. The first support surface 223, the top surface of the first guide rail 172, the second support surface 253, the top surface of the second guide rail 174, and the top surface 141 of the support plate 13 are substantially coplanar and collectively support the display screen 300. The second stop surface 23 is opposite to the first stop surface 153 and interlocks with each other. The second stop surface 23 and the first stop surface 153 can either directly contact or abut each other. The fourth stop surface 26 is opposite to the third stop surface 163 and interlocks with each other. The fourth stop surface 26 and the third stop surface 163 can either directly contact or abut each other.

[0152] In this embodiment, a first stop surface 153 is provided in the first rotation groove, and a second stop surface 23 is provided on the first main swing arm 21. When the rotating mechanism 100 is in the flattened state, the second stop surface 23 and the first stop surface 153 abut against each other, so that when the rotating mechanism 100 is in the flattened state, the second stop surface 23 can prevent the first main swing arm 21 from moving along the X direction toward the base 10, thereby reducing or even avoiding the virtual position of the rotating mechanism 100 in the flattened state, thereby improving the user experience; at the same time, it can also avoid redundancy and arching of the display screen 300, thereby improving the service life of the display screen 300, and preventing the foldable electronic device 1000 from being over-unfolded and causing damage to the display screen 300.

[0153] Moreover, in this embodiment, the second stop surface 23 is arranged at the end of the first main swing arm 21, which can increase the area of ​​the second stop surface 23, thereby increasing the contact area between the second stop surface 23 and the first stop surface 153, and increasing the stop area between the first main swing arm 21 and the base 10, thereby further improving the stopping effect and stopping accuracy of the first main swing arm 21 and the base 10, and further reducing or even avoiding the virtual position when the rotating mechanism 100 is in the flattened state.

[0154] At the same time, in this embodiment, by providing a third stop surface 163 on the second rotation groove and a fourth stop surface 26 on the second main swing arm 24, and when the rotation mechanism 100 is in the flattened state, the fourth stop surface 26 and the third stop surface 163 abut against each other, so that when the rotation mechanism 100 is in the flattened state, the second main swing arm 24 cannot continue to move along the X direction toward the base 10, thereby further reducing or even avoiding the virtual position of the rotation mechanism 100 in the flattened state, thereby improving the user experience.

[0155] Please refer to Figures 18, 19 and 20. Figure 18 is a partial structural schematic diagram of the rotating mechanism 100 shown in Figure 5 in the third embodiment, Figure 19 is a decomposed structural schematic diagram of the rotating mechanism 100 shown in Figure 18, and Figure 20 is a decomposed structural schematic diagram of the rotating mechanism 100 shown in Figure 18 at another angle.

[0156] The base 10 in the rotating mechanism 100 shown in this embodiment is different from the base 10 shown in FIG. 7 in that:

[0157] In this embodiment, the first inner wall 151 of the support plate 13 includes a first curved surface 152 and a first stop surface 153. The first stop surface 153 includes a first sub-stop surface 155 and a third sub-stop surface 156. The first curved surface 152 includes two sub-curved surfaces. The two sub-curved surfaces are located on opposite sides of the first inner wall 151 in the Y direction. The third sub-stop surface 156 and the first sub-stop surface 155 are both connected between the two sub-curved surfaces of the first curved surface 152. The third sub-stop surface 156 and the first sub-stop surface 155 are arranged side by side along the Z direction. Furthermore, the first sub-stop surface 155 is located on the negative Z-axis side of the third sub-stop surface 156. Both the third sub-stop surface 156 and the first sub-stop surface 155 are planar and face the first side surface 143. The planes of the first sub-stop surface 155 and the third sub-stop surface 156 intersect the X direction. In this embodiment, both the first sub-stop surface 155 and the third sub-stop surface 163 are perpendicular to the X-direction. There is a height difference between the top surface of the first guide rail 172 and the top surface 141 of the bracket 12, and the top surface of the first guide rail 172 is located in the positive Z-axis direction relative to the top surface 141. The first sub-stop surface 155 is connected between the top surface 141 and the top surface of the first guide rail 172. The third sub-stop surface 156 is located on opposite sides of the first guide rail 172 in the Y-direction and is fixedly connected to the side surfaces of the first guide rail 172 in the Y-direction.

[0158] In this embodiment, the second inner wall 154 further includes a second curved surface 162 and a third stop surface 163. The third stop surface 163 includes a fifth sub-stop surface 165 and a seventh sub-stop surface 166. The second curved surface 162 includes two sub-curved surfaces. The two sub-curved surfaces of the second curved surface 162 are located on opposite sides of the second inner wall 154 in the Y direction. The seventh sub-stop surface 166 and the fifth sub-stop surface 165 are both connected between the two sub-curved surfaces of the second curved surface 162. The seventh sub-stop surface 166 and the fifth sub-stop surface 165 are arranged side by side along the Z direction. Furthermore, the fifth sub-stop surface 165 is located on the negative Z-axis side of the seventh sub-stop surface 166. Both the seventh sub-stop surface 166 and the fifth sub-stop surface 165 are planar and face the second side surface 144. The planes of the seventh sub-stop surface 166 and the fifth sub-stop surface 165 are perpendicular to the X direction. The top surface of the second guide rail 174 is at a height difference from the top surface 141 of the bracket 12, and is located in the positive Z-axis direction relative to the top surface 141. The fifth sub-stop surface 165 is connected between the top surface 141 and the top surface of the second guide rail 174. The seventh sub-stop surface 166 is located on opposite sides of the second guide rail 174 in the Y direction and is fixedly connected to the side surfaces of the second guide rail 174 in the Y direction.

[0159] The main swing arm 20 of the rotating mechanism 100 shown in this embodiment is different from the main swing arm 20 shown in FIG. 8 in that:

[0160] In this embodiment, a first avoidance notch 228 is provided at the first end 221 of the first main swing arm 21. The first avoidance notch 228 extends through the first support surface 223 and the first rotating surface 224. The second stop surface 23 includes a second sub-stop surface 231 and a fourth sub-stop surface 232. The second sub-stop surface 231 is provided on the bottom wall of the first avoidance notch 228. The second sub-stop surface 231 faces the first end 221. In this embodiment, the second sub-stop surface 231 is perpendicular to the X-direction. It will be understood that the second sub-stop surface 231 is the bottom wall of the first avoidance notch 228. The opening of the first groove 227 is located on the first rotating surface 224 and is connected to the first avoidance notch 228. The fourth sub-stop surface 232 is provided on the first side wall 2272 of the first groove 227 and faces the first end 221. The structure of the fourth sub-stop surface 232 in this embodiment is the same as that of the second stop surface 23 in the embodiment shown in FIG. 8 . The first bottom wall 2271 of the first groove 227 is arc-shaped. The first bottom wall 2271 is connected to the second sub-stop surface 231. That is, the second sub-stop surface 231 is connected between the first bottom wall 2271 and the first support surface 223. The second sub-stop surface 231 is used to stop with the first sub-stop surface 155 provided in the first rotation groove.

[0161] In this embodiment, a second relief notch 258 is provided at the third end 251 of the second main swing arm 24. The second relief notch 258 extends through the second support surface 253 and the second rotational surface 254. The fourth stop surface 26 includes a sixth sub-stop surface 261 and an eighth sub-stop surface 262. The sixth sub-stop surface 261 is provided on the bottom wall of the second relief notch 258. The sixth sub-stop surface 261 faces the third end 251. In this embodiment, the sixth sub-stop surface 261 is perpendicular to the X-direction. The opening of the second groove 257 is located on the second rotational surface 254 and communicates with the second relief notch 258. The eighth sub-stop surface 262 is provided on the second sidewall 2572 of the second groove 257 and faces the third end 251. The structure of the eighth sub-stop surface 262 in this embodiment is identical to that of the fourth stop surface 26 in the embodiment shown in FIG. The second bottom wall 2571 of the second groove 257 is arcuate and connected to the sixth sub-stop surface 261. That is, the sixth sub-stop surface 261 is connected between the second bottom wall 2571 and the second support surface 253. The sixth sub-stop surface 261 is used to stop with the fifth sub-stop surface 165 provided on the second rotation groove.

[0162] Please also refer to FIG. 21 , which is a schematic cross-sectional view of the rotating mechanism 100 shown in FIG. 18 along the CC direction.

[0163] The first main swing arm 21 and the second main swing arm 24 are both mounted on the base 10 and are respectively located on opposite sides of the base 10 on the X-axis. The first rotating body 22 of the first main swing arm 21 is mounted in the first rotating groove. The first rotating surface 224 faces the bracket 12. The first slide rail 171 is located in the first arcuate groove 225, and the bottom surface of the first slide rail 171 is opposite to and in contact with the bottom wall of the first arcuate groove 225. The first guide rail 172 is located in the first groove 227, and the top surface of the first guide rail 172 is opposite to and in contact with the first bottom wall 2271 of the first groove 227. The two opposite side walls of the first guide rail 172 in the Y direction are respectively opposite to the two opposite first side walls 2272 of the first groove 227. When the first main swing arm 21 rotates relative to the base 10, the first rotating body 22 can slide and rotate in the first rotating groove along the extension direction of the first slide rail 171 and the first guide rail 172.

[0164] The second rotating body 25 of the second main swing arm 24 is installed in the second rotating groove. The second rotating surface 254 faces the bracket 12. The second slide rail 173 is located in the second arc-shaped groove 255, and the bottom surface of the second slide rail 173 is opposite to and in contact with the bottom wall of the second arc-shaped groove 255. The second guide rail 174 is located in the second groove 257, and the top surface of the second guide rail 174 is opposite to and in contact with the second bottom wall 2571 of the second groove 257. The two opposite side walls of the second guide rail 174 in the Y direction are respectively opposite to the two opposite second side walls 2572 of the second groove 257. When the second main swing arm 24 rotates relative to the base 10, the second rotating body 25 can slide and rotate in the second rotating groove along the extension direction of the second slide rail 173 and the second guide rail 174.

[0165] When the rotating mechanism 100 switches from the folded state to the flattened state, the first main swing arm 21 rotates clockwise, the first rotating surface 224 slides along the first arc surface 152 toward the direction close to the first rotating groove, the bottom wall of the first arc groove 225 slides along the bottom surface of the first slide rail 171 toward the direction close to the first rotating groove, the first bottom wall 2271 of the first groove 227 slides along the top surface of the first guide rail 172 toward the direction close to the first guide rail 172, the fourth sub-stop surface 232 moves toward the third sub-stop surface 156 and stops with each other, and the second sub-stop surface 231 moves toward the first sub-stop surface 155 and stops with each other. The second main swing arm 24 rotates counterclockwise, the second rotating surface 254 slides along the second arc surface 162 toward the second rotating groove, the bottom wall of the second arc groove 255 slides along the bottom surface of the second slide rail 173 toward the second rotating groove, the second bottom wall 2571 of the second groove 257 slides along the top surface 141 of the second guide rail 174 toward the second guide rail 174, the eighth sub-stop surface 262 moves toward the seventh sub-stop surface 166 and stops with each other, the sixth sub-stop surface 261 moves toward the fifth sub-stop surface 165 and stops with each other, so that the rotating mechanism 100 is in a flattened state.

[0166] When the rotating mechanism 100 is in the flattened state, the first main swing arm 21 and the second main swing arm 24 are relatively extended. The end of the first guide rail 172 facing away from the first inner wall 151 is located in the first avoidance hole 226, and the end of the second guide rail 174 facing away from the third inner wall 161 is located in the second avoidance hole 256. The first support surface 223, the second support surface 253, and the top surface 141 of the support plate 13 are approximately coplanar and collectively support the display screen 300. The fourth sub-stop surface 232 is opposite to and interlocked with the third sub-stop surface 156. The fourth sub-stop surface 232 and the third sub-stop surface 156 can either directly contact or abut against each other. The second sub-stop surface 231 is opposite to and interlocked with the first sub-stop surface 155. The second sub-stop surface 231 and the first sub-stop surface 155 can either directly contact or abut against each other. The eighth sub-stop surface 262 and the seventh sub-stop surface 166 are opposite and interlocked with each other. The eighth sub-stop surface 262 and the seventh sub-stop surface 166 can be in direct contact or can also abut against each other. The sixth sub-stop surface 261 and the fifth sub-stop surface 165 are opposite and interlocked with each other. The sixth sub-stop surface 261 and the fifth sub-stop surface 165 can be in direct contact or can also abut against each other.

[0167] In this embodiment, by providing a first sub-stop surface 155 on the support plate 13 and a second sub-stop surface 231 on the first main swing arm 21, when the rotating mechanism 100 is in the flattened state, the first main swing arm 21 and the base 10 are stopped not only by the fourth sub-stop surface 232 and the third sub-stop surface 156, but also by the second sub-stop surface 231 and the first sub-stop surface 155, thereby further preventing the first main swing arm 21 from continuing to move along the X direction toward the base 10, improving the stopping effect and stopping accuracy, further reducing or even avoiding the virtual position of the rotating mechanism 100 in the flattened state, and improving the user experience; at the same time, it can also further avoid redundancy and anti-arching of the display screen 300, thereby increasing the service life of the display screen 300, and preventing the foldable electronic device 1000 from being over-unfolded and causing damage to the display screen 300.

[0168] Moreover, in the present embodiment, by providing the fifth sub-stop surface 165 on the support plate 13 and the sixth sub-stop surface 261 on the second main swing arm 24, when the rotating mechanism 100 is in the flattened state, the second main swing arm 24 and the base 10 are stopped not only by the seventh sub-stop surface 166 and the eighth sub-stop surface 262, but also by the fifth sub-stop surface 165 and the sixth sub-stop surface 261, thereby further preventing the second main swing arm 24 from continuing to move along the X direction toward the base 10, improving the stopping effect and stopping accuracy, further reducing or even avoiding the virtual position of the rotating mechanism 100 in the flattened state, and improving the user experience.

[0169] Please refer to Figures 22, 23 and 24. Figure 22 is a partial structural schematic diagram of the rotating mechanism 100 shown in Figure 5 in the fourth embodiment, Figure 23 is a decomposed structural schematic diagram of the rotating mechanism 100 shown in Figure 22, and Figure 24 is a decomposed structural schematic diagram of the rotating mechanism 100 shown in Figure 22 at another angle.

[0170] The base 10 in the rotating mechanism 100 shown in this embodiment is different from the base 10 shown in FIG. 7 in that:

[0171] In this embodiment, the first inner wall 151 of the support plate 13 includes a first stop surface 153. The first stop surface 153 includes a third sub-stop surface 156 and a first sub-stop surface 155. The first sub-stop surface 155 includes two parts. The two parts of the first sub-stop surface 155 are located on opposite sides of the first inner wall 151 in the Y direction. The third sub-stop surface 156 is connected between the two parts of the first sub-stop surface 155. The third sub-stop surface 156 and the first sub-stop surface 155 are both planes and both face the first side surface 143. The planes on which the first sub-stop surface 155 and the third sub-stop surface 156 lie intersect with the X direction. In this embodiment, the first sub-stop surface 155 and the third sub-stop surface 156 are both perpendicular to the X direction.

[0172] In this embodiment, the second inner wall 154 includes a third stop surface 163. The third stop surface 163 includes a seventh sub-stop surface 166 and a fifth sub-stop surface 165. The fifth sub-stop surface 165 includes two portions. The two portions of the fifth sub-stop surface 165 are located on opposite sides of the second inner wall 154 in the Y direction. The seventh sub-stop surface 166 connects between the two portions of the fifth sub-stop surface 165. Both the seventh sub-stop surface 166 and the fifth sub-stop surface 165 are planar and face the second side surface 144. The planes of the fifth sub-stop surface 165 and the seventh sub-stop surface 166 both intersect the X direction. In this embodiment, both the fifth sub-stop surface 165 and the seventh sub-stop surface 166 are perpendicular to the X direction.

[0173] The main swing arm 20 of the rotating mechanism 100 shown in this embodiment is different from the main swing arm 20 shown in FIG. 8 in that:

[0174] In this embodiment, the second stop surface 23 includes a second sub-stop surface 231 and a fourth sub-stop surface 232. The second sub-stop surface 231 is located on the surface of the first end 221 facing away from the second end 222. The second sub-stop surface 231 is a plane, and the plane in which the second sub-stop surface 231 lies is perpendicular to the X-axis. It can be understood that the second sub-stop surface 231 is the end surface of the first rotating body 22 in the negative direction of the X-axis. The fourth sub-stop surface 232 is located on the first sidewall 2272 of the first groove 227 and faces the first end 221. The structure of the fourth sub-stop surface 232 in this embodiment is identical to that of the second stop surface 23 in the embodiment shown in FIG. The orientation of the second sub-stop surface 231 is the same as that of the fourth sub-stop surface 232. The second sub-stop surface 231 is used to stop against the first sub-stop surface 155, and the fourth sub-stop surface 232 is used to stop against the third sub-stop surface 156. That is, the second sub-stop surface 231 and the fourth sub-stop surface 232 are used together to abut against the base 10 .

[0175] In this embodiment, the fourth stop surface 26 of the second main swing arm 24 includes a sixth sub-stop surface 261 and an eighth sub-stop surface 262. The sixth sub-stop surface 261 is located on the bottom wall of the second avoidance notch 258. The sixth sub-stop surface 261 is located on the side of the second end 222 facing away from the second end 222. The sixth sub-stop surface 261 is a plane, and the plane in which the sixth sub-stop surface 261 lies is perpendicular to the X-axis. It can be understood that the sixth sub-stop surface 261 is the end surface of the second rotating body 25 in the negative direction of the X-axis. The eighth sub-stop surface 262 is located on the second sidewall 2572 of the second groove 257 and faces the third end 251. The structure of the eighth sub-stop surface 262 in this embodiment is identical to that of the fourth stop surface 26 in the embodiment shown in FIG. The orientation of the sixth sub-stop surface 261 is identical to that of the eighth sub-stop surface 262. The sixth sub-stop surface 261 is used to stop with the fifth sub-stop surface 165 , and the eighth sub-stop surface 262 is used to stop with the seventh sub-stop surface 166 . That is, the sixth sub-stop surface 261 and the eighth sub-stop surface 262 are used together to abut against the base 10 .

[0176] Please refer to FIG. 25 , which is a schematic cross-sectional view of the rotating mechanism 100 shown in FIG. 22 along the DD direction.

[0177] The first main swing arm 21 and the second main swing arm 24 are both mounted on the base 10 and are respectively located on opposite sides of the base 10 on the X-axis. The first rotating body 22 of the first main swing arm 21 is mounted in the first rotating groove. The first rotating surface 224 faces the bracket 12. The first slide rail 171 is located in the first arcuate groove 225, and the bottom surface of the first slide rail 171 is opposite to and in contact with the bottom wall of the first arcuate groove 225. The first guide rail 172 is located in the first groove 227, and the top surface of the first guide rail 172 is opposite to and in contact with the first bottom wall 2271 of the first groove 227. The two opposite side walls of the first guide rail 172 in the Y direction are respectively facing the two opposite first side walls 2272 of the first groove 227. When the first main swing arm 21 rotates relative to the base 10, the first rotating body 22 can slide and rotate in the first rotating groove along the extension direction of the first slide rail 171 and the first guide rail 172.

[0178] The second rotating body 25 of the second main swing arm 24 is mounted in the second rotating groove. The second rotating surface 254 faces the bracket 12. The second slide rail 173 is located in the second arcuate groove 255, and the bottom surface of the second slide rail 173 is opposite to and in contact with the bottom wall of the second arcuate groove 255. The second guide rail 174 is located in the second groove 257, and the top surface of the second guide rail 174 is opposite to and in contact with the second bottom wall 2571 of the second groove 257. The two opposite side walls of the second guide rail 174 in the Y direction respectively face the two opposite second side walls 2572 of the second groove 257. When the second main swing arm 24 rotates relative to the base 10, the second rotating body 25 can slide and rotate in the second rotating groove along the extension direction of the second slide rail 173 and the second guide rail 174.

[0179] When the rotating mechanism 100 switches from the folded state to the flattened state, the first main swing arm 21 rotates clockwise, the bottom wall of the first arc-shaped groove 225 slides along the bottom surface of the first slide rail 171 toward the direction close to the first rotating groove, the first bottom wall 2271 of the first groove 227 slides along the top surface of the first guide rail 172 toward the direction close to the first guide rail 172, the fourth sub-stop surface 232 moves toward the third sub-stop surface 156 and stops with each other, and the second sub-stop surface 231 moves toward the first sub-stop surface 155 and stops with each other. The second main swing arm 24 rotates counterclockwise, the bottom wall of the second arc-shaped groove 255 slides along the bottom surface of the second slide rail 173 toward the second rotating groove, the second bottom wall 2571 of the second groove 257 slides along the top surface 141 of the second guide rail 174 toward the second guide rail 174, the eighth sub-stop surface 262 moves toward the seventh sub-stop surface 166 and stops with each other, the sixth sub-stop surface 261 moves toward the fifth sub-stop surface 165 and stops with each other, so that the rotating mechanism 100 is in a flattened state.

[0180] When the rotating mechanism 100 is in the flattened state, the end of the first guide rail 172 facing away from the first inner wall 151 is located in the first avoidance hole 226, and the end of the second guide rail 174 facing away from the third inner wall 161 is located in the second avoidance hole 256. The first support surface 223, the second support surface 253, and the top surface 141 of the support plate 13 are approximately coplanar and collectively support the display screen 300. The fourth sub-stop surface 232 opposes and interlocks with the third sub-stop surface 156. The fourth sub-stop surface 232 and the third sub-stop surface 156 can either directly contact or abut against each other. The second sub-stop surface 231 opposes and interlocks with the first sub-stop surface 155. The second sub-stop surface 231 and the first sub-stop surface 155 can either directly contact or abut against each other. The eighth sub-stop surface 262 and the seventh sub-stop surface 166 are opposite and interlocked with each other. The eighth sub-stop surface 262 and the seventh sub-stop surface 166 can be in direct contact or can also abut against each other. The sixth sub-stop surface 261 and the fifth sub-stop surface 165 are opposite and interlocked with each other. The sixth sub-stop surface 261 and the fifth sub-stop surface 165 can be in direct contact or can also abut against each other.

[0181] In this embodiment, by providing a first sub-stop surface 155 on the support plate 13 and a second sub-stop surface 231 on the first main swing arm 21, when the rotating mechanism 100 is in the flattened state, the first main swing arm 21 and the support plate 13 are stopped not only by the third sub-stop surface 156 and the fourth sub-stop surface 232, but also by the first sub-stop surface 155 and the second sub-stop surface 231, thereby further preventing the first main swing arm 21 from continuing to move along the X direction toward the base 10, improving the stopping effect and stopping accuracy, further reducing or even avoiding the virtual position of the rotating mechanism 100 in the flattened state, and improving the user experience; at the same time, it can also further avoid redundancy and anti-arching of the display screen 300, thereby increasing the service life of the display screen 300, and preventing the foldable electronic device 1000 from being over-unfolded and causing damage to the display screen 300.

[0182] Moreover, in the present embodiment, by providing the fifth sub-stop surface 165 on the support plate 13 and the sixth sub-stop surface 261 on the second main swing arm 24, when the rotating mechanism 100 is in the flattened state, the second main swing arm 24 and the support plate 13 are stopped not only by the seventh sub-stop surface 166 and the eighth sub-stop surface 262, but also by the fifth sub-stop surface 165 and the sixth sub-stop surface 261, thereby further preventing the second main swing arm 24 from continuing to move along the X direction toward the base 10, improving the stopping effect and stopping accuracy, further reducing or even avoiding the virtual position of the rotating mechanism 100 in the flattened state, and improving the user experience.

[0183] At the same time, in this embodiment, by arranging the first sub-stop surface 155 on the end surface of the first main swing arm 21, the area of ​​the first sub-stop surface 155 can be increased, thereby increasing the stop area of ​​the first main swing arm 21 and the support plate 13, and further improving the stop effect and stop accuracy of the first main swing arm 21 and the support plate 13, and further reducing or even avoiding the virtual position of the rotating mechanism 100 when it is in the flattened state.

[0184] In this embodiment, by arranging the fifth sub-stop surface 165 on the end surface of the second main swing arm 24, the area of ​​the fifth sub-stop surface 165 can be increased, thereby increasing the stop area of ​​the second main swing arm 24 and the support plate 13, and further improving the stop effect and stop accuracy of the second main swing arm 24 and the support plate 13, and further reducing or even avoiding the virtual position when the rotating mechanism 100 is in the flattened state.

[0185] It should be noted that the structure of the main swing arm 20 in any rotating component 1 in the rotating mechanism 100 shown in Figure 5 can be the same as the structure of any main swing arm 20 in the above four embodiments, and the structure of the support plate 13 can be adjusted according to the structure of the main swing arm 20 adopted.

[0186] Please refer to FIG. 26 , which is a schematic structural diagram of the fixing frame 30 in the first rotating assembly 101 of the rotating mechanism 100 shown in FIG. 5 .

[0187] The fixed frame 30 in the first rotating assembly 101 includes a first fixed frame 31 and a second fixed frame 32. The first fixed frame 31 is a thick, elongated, plate-like structure. The first fixed frame 31 is provided with a first guide slot 311, a first axial hole 312, a first slot 313, and a third axial hole 314. The first guide slot 311 is arc-shaped. It is configured for sliding connection with the first pressure plate 41. In this embodiment, there are three first guide slots 311. These three first guide slots 311 are spaced apart along the length (Y-direction) of the first fixed frame 31. The first axial hole 312 extends parallel to the X-direction. The first axial hole 312 is configured for rotational connection with the first main swing arm 21 in the first rotating assembly 101. The third axial hole 314 is spaced apart from the first axial hole 312. The third axial hole 314 extends parallel to the X-direction. The third axial hole 314 is configured for rotational connection with the third main swing arm 27 in the first rotating assembly 101. The first slide groove 313 is provided on the top surface of the first fixing frame 31. The extending direction of the first slide groove 313 is parallel to the width direction (X direction) of the first fixing frame 31. The first slide groove 313 is used for sliding connection with the first synchronous swing arm 51.

[0188] The second fixing frame 32 is symmetrical to the first fixing frame 31, and the second fixing frame 32 and the first fixing frame 31 are mirror-imaged about the reference plane P. The second fixing frame 32 is provided with a second guide slot 321, a second axial hole 322, a second slot 323, and a fourth axial hole 324. The second guide slot 321 is configured to be slidably connected to the second pressure plate 42. In this embodiment, there are three second guide slots 321. The three second guide slots 321 are spaced apart along the length (Y direction) of the second fixing frame 32. The second axial hole 322 extends parallel to the X direction. The second axial hole 322 is configured to be rotationally connected to the second main swing arm 24 in the first rotating assembly 101. The fourth axial hole 324 is spaced apart from the second axial hole 322. The fourth axial hole 324 extends parallel to the X direction. The fourth axial hole 324 is configured to be rotationally connected to the fourth main swing arm 28 in the first rotating assembly 101. The second slot 323 is provided on the top surface of the second fixing frame 32. The extending direction of the second sliding groove 323 is parallel to the width direction (X direction) of the second fixing frame 32. The second sliding groove 323 is used for sliding connection with the second synchronous swing arm 52.

[0189] Please refer to FIG. 27 , which is a partial structural diagram of the pressure plate 40 in the rotating mechanism 100 shown in FIG. 5 .

[0190] The pressure plate 40 includes a first pressure plate 41 and a second pressure plate 42. The first pressure plate 41 includes a first body 411 and a first guide slider 412. The first body 411 is a long plate-like structure. The first guide slider 412 is arc-shaped. The structure of the first guide slider 412 matches the structure of the first guide slot 311. The first guide slider 412 is fixed to the bottom surface of the first body 411. The first guide slider 412 is used to be installed in the first guide slot 311 to achieve a rotational and sliding connection with the first fixed frame 31. In this embodiment, there are three first guide sliders 412. The three first guide sliders 412 are arranged at intervals along the length direction (Y direction) of the first body 411. In addition, the three first guide sliders 412 are arranged in a one-to-one correspondence with the three first guide slots 311.

[0191] The first body 411 is provided with a first sliding hole 413 and a third sliding hole 414. The first sliding hole 413 is provided on the bottom surface of the first body 411. The depth direction of the first sliding hole 413 is parallel to the Y direction. The first sliding hole 413 is used to achieve rotational and sliding connection between the first pressure plate 41 and the first main swing arm 21. In this embodiment, the first sliding hole 413 is in the shape of a curved teardrop. The shape of the first sliding hole 413 referred to here refers to the shape of the cross section of the first sliding hole 413. The cross section direction is perpendicular to the depth direction of the first sliding hole 413. In other embodiments, the first sliding hole 413 may also be in the shape of an elongated strip or other special-shaped structure. The shape of the first sliding hole 413 is not specifically limited here, as long as the first sliding hole 413 can achieve rotational and sliding connection between the first pressure plate 41 and the first main swing arm 21.

[0192] The shape of the third sliding hole 414 is the same as or similar to that of the first sliding hole 413. The third sliding hole 414 is spaced apart from the first sliding hole 413. The third sliding hole 414 is used to achieve a sliding and rotational connection between the first pressure plate 41 and the third main swing arm 27.

[0193] The second pressure plate 42 and the first pressure plate 41 are symmetrical structures, and the second pressure plate 42 and the first pressure plate 41 are mirror-symmetrical about the reference plane P. The second pressure plate 42 includes a second body 421 and a second guide slider 422. The second body 421 is a long, plate-like structure. The second guide slider 422 is arc-shaped. The structure of the second guide slider 422 matches the structure of the second guide slot 321. The second guide slider 422 is fixed to the bottom surface of the second body 421. The second guide slider 422 is used to be installed in the second guide slot 321 to achieve a rotational and sliding connection with the second fixed frame 32. In this embodiment, there are three second guide sliders 422. The three second guide sliders 422 are arranged at intervals along the length direction (Y direction) of the second body 421. In addition, the three second guide sliders 422 are arranged in a one-to-one correspondence with the three second guide slots 321.

[0194] The second body 421 is provided with a second sliding hole 423 and a fourth sliding hole 424. The second sliding hole 423 is provided on the bottom surface of the second body 421. The depth direction of the second sliding hole 423 is parallel to the Y direction. The second sliding hole 423 is used to achieve a rotational and sliding connection between the second main swing arm 24 and the second pressure plate 42. In this embodiment, the second sliding hole 423 is in the shape of a curved teardrop. The shape of the fourth sliding hole 424 is the same as or similar to that of the second sliding hole 423. The fourth sliding hole 424 is spaced apart from the second sliding hole 423. The fourth sliding hole 424 is used to achieve a sliding and rotational connection between the second pressure plate and the third main swing arm 27.

[0195] Please refer to Figure 5 . The first fixed frame 31, the first pressure plate 41, the first main swing arm 21, and the third main swing arm 27 are all located on the positive X-axis side of the base 10. The first pressure plate 41 is mounted on the first fixed frame 31 and can slide and rotate relative to the first fixed frame 31. The bottom surface of the first pressure plate 41 faces the top surface of the first fixed frame 31. The first guide slider 412 is located in the first guide slot 311 and can slide along the first guide slot 311. The first rotating body 22 of the first main swing arm 21 is mounted in the first rotating slot, with the first shaft seat 211 facing the first fixed frame 31. The rotating mechanism 100 also includes a first rotating shaft a and a second rotating shaft b. The first rotating shaft a is mounted in the first shaft hole 312 and can rotate therein. The second rotating shaft b is mounted in the first sliding hole 413. The second rotating shaft b can rotate about the axis of the second rotating shaft b within the first sliding hole 413 and can also slide within the first sliding hole 413. The third main swing arm 27 is spaced apart from the first main swing arm 21. It is rotationally connected to the first fixing frame 31 and is rotationally and slidably connected to the first pressure plate 41. The third main swing arm 27 is mounted in a third rotation slot and can rotate and slide within the slot. The connection between the third main swing arm 27, the first fixing frame 31, and the first pressure plate 41 is similar to that of the first main swing arm 21 and will not be further described here. The first fixing frame 31 is fixedly connected to the first housing 210.

[0196] The second fixed frame 32, the second pressure plate 42, the second main swing arm 24, and the fourth main swing arm 28 are all located on the negative X-axis side of the base 10. The second pressure plate 42 is mounted on the second fixed frame 32 and can slide and rotate relative to the second fixed frame 32. The bottom surface of the second pressure plate 42 faces the top surface of the second fixed frame 32. The second guide slider 422 is located in the second guide slot 321 and can slide along the second guide slot 321. The second rotating body 25 of the second main swing arm 24 is mounted in the second rotation slot, with the second shaft seat 241 facing the second fixed frame 32. The rotation mechanism 100 also includes a third rotating shaft c and a fourth rotating shaft d. The third rotating shaft c is mounted in the second shaft hole 322 and can rotate within the second shaft hole 322. The third rotating shaft c is mounted in the second sliding hole 423 and can rotate about the axis of the third rotating shaft c within the second sliding hole 423 and can slide within the second sliding hole 423. The fourth main swing arm 28 is spaced apart from the second main swing arm 24. The fourth main swing arm 28 is rotationally connected to the second fixing frame 32 and is rotationally and slidably connected to the second pressure plate 42. The fourth main swing arm 28 is mounted in a fourth rotation slot and is both rotatable and slidable within the slot. The connection between the fourth main swing arm 28, the second fixing frame 32, and the second pressure plate 42 is similar to that of the second main swing arm 24 and will not be further described here. The second fixing frame 32 is fixedly connected to the second housing 220.

[0197] Rotation of the first housing 210 relative to the base 10 drives the first fixing frame 31 to rotate relative to the base 10, thereby driving the first pressure plate 41 to rotate relative to the base 10. This rotation of the first fixing frame 31 relative to the base 10 also drives the first pressure plate 41 to rotate and slide relative to the first fixing frame 31 along the first guide slot 311. Rotation of the first fixing frame 31 relative to the base 10 also drives the first main swing arm 21 to rotate, causing the first rotating body 22 to rotate and slide within the first rotating slot. The first rotating shaft a rotates within the first shaft hole 312, and the second rotating shaft b rotates and slides within the first sliding hole 413.

[0198] Rotation of the second housing 220 relative to the base 10 drives the second fixing frame 32 to rotate relative to the base 10, thereby driving the second pressure plate 42 to rotate relative to the base 10, and causing the second pressure plate 42 to rotate and slide relative to the second fixing frame 32 along the second guide slot 321. Rotation of the second fixing frame 32 relative to the base 10 also drives rotation of the second main swing arm 24, causing the second rotating body 25 to rotate and slide within the second rotating slot, the third rotating shaft c to rotate within the second shaft hole 322, and the fourth rotating shaft d to rotate and slide within the second sliding hole 423.

[0199] The first housing 210 and the second housing 220 rotate in opposite directions, the first fixing frame 31 and the second fixing frame 32 rotate in opposite directions, the first pressure plate 41 and the second pressure plate 42 rotate in opposite directions, and the first main swing arm 21 and the second main swing arm 24 rotate in opposite directions. For example, when the rotating mechanism 100 rotates from the flattened state to the folded state, the first fixing frame 31, the first pressure plate 41, and the first main swing arm 21 rotate counterclockwise, while the second fixing frame 32, the second pressure plate 42, and the second main swing arm 24 rotate clockwise. When the rotating mechanism 100 rotates from the folded state to the flattened state, the first fixing frame 31, the first pressure plate 41, and the first main swing arm 21 rotate clockwise, while the second fixing frame 32, the second pressure plate 42, and the second main swing arm 24 rotate counterclockwise.

[0200] In this embodiment, by providing a first fixing frame 31 and a second fixing frame 32, and fixing the first fixing frame 31 to the first shell 210 and fixing the second fixing frame 32 to the second shell 220, the connection strength between the fixing frame 30 and the shell can be increased, thereby improving the rotation stability of the foldable electronic device 1000.

[0201] The first pressing plate 41 and the second pressing plate 42 are both disposed opposite the display screen 300. That is, the orthographic projections of the display screen 300 on the first pressing plate 41 and the second pressing plate 42 completely cover the first pressing plate 41 and the second pressing plate 42, or partially cover the first pressing plate 41 and the second pressing plate 42. The first pressing plate 41, the second pressing plate 42, and the support plate 13 collectively support the display screen 300, thereby increasing the stability of the connection of the display screen 300 and ensuring a good display on the display screen 300.

[0202] In this embodiment, the display screen 300 is folded and unfolded by rotating the first pressing plate 41 and the second pressing plate 42, respectively, through rotation of the first fixing frame 31. In this embodiment, by providing a guide slot on the first pressing plate 41 and an arcuate guide slider on the first fixing frame 31, the first pressing plate 41 can slide in an arcuate manner relative to the first fixing frame 31. By providing a guide slot on the second pressing plate 42 and an arcuate guide slider on the second fixing frame 32, the second pressing plate 42 can slide in an arcuate manner relative to the second fixing frame 32. When the first fixing frame 31 and the second fixing frame 32 rotate, the first pressing plate 41 and the second pressing plate 42 rotate relative to each other, and the first pressing plate 41 slides in an arc relative to the first fixing frame 31, while the second pressing plate 42 slides in an arc relative to the second fixing frame 32. This allows the angle between the first pressing plate 41 and the second pressing plate 42 to be adjustable, thereby adapting to the folding angle of the foldable portion of the display screen 300 and preventing the first pressing plate 41 and the second pressing plate 42 from squeezing the display screen 300 when the rotating mechanism 100 is in the folded state. In other words, when the rotating mechanism 100 is in the folded state, the angle between the first fixing frame 31 and the second fixing frame 32 is different from the angle between the first pressing plate 41 and the second pressing plate 42, and the angle between the first pressing plate 41 and the second pressing plate 42 can be adjusted according to the bending angle of the display screen 300 to adapt to the bending of the display screen 300.

[0203] Please refer to FIG. 28 , which is a schematic diagram of a partially exploded structure of the rotating mechanism 100 shown in FIG. 6 .

[0204] The synchronization assembly 50 includes a first synchronization swing arm 51, a second synchronization swing arm 52, a synchronization gear 53, and a damping member 60. The synchronization gear 53 and the damping member 60 are both mounted on the base 10. The first synchronization swing arm 51 and the second synchronization swing arm 52 are respectively located on opposite sides of the base 10 in the X direction and mesh with the synchronization gear 53 and the damping member 60. When the first synchronization swing arm 51 rotates, it drives the synchronization gear 53 to rotate, thereby driving the second synchronization swing arm 52 to rotate, thereby achieving synchronized movement of the first synchronization swing arm 51 and the second synchronization swing arm 52. In addition, when the first synchronization swing arm 51 and the second synchronization swing arm 52 rotate, they abut against the damping member 60, causing the damping member 60 to generate a damping force, thereby providing a damping force for the rotation of the rotating mechanism 100 and providing a damping feel to the user.

[0205] The synchronization assembly 50 also includes fixed rods 54. In this embodiment, there are two fixed rods 54. The two fixed rods 54 are respectively a first fixed rod 541 and a second fixed rod 542. The first fixed rod 541 and the second fixed rod 542 are spaced apart along the X-direction. Furthermore, the first fixed rod 541 and the second fixed rod 542 both extend parallel to the Y-direction and are fixedly connected to the base 10.

[0206] The damping member 60 includes a baffle 61, a first damping plate 62, a second damping plate 63, and a damping spring 64. The first damping plate 62 is provided with a first hinge seat 621 and a second hinge seat 622. The first hinge seat 621 includes a plurality of protrusions and a plurality of recesses. The plurality of protrusions and the plurality of recesses are arranged alternately to form a ring structure. The second hinge seat 622 has the same or similar structure as the first hinge seat 621. The first hinge seat 621 and the second hinge seat 622 are spaced apart along the X direction. The second damping plate 63 is provided with a third hinge seat 631 and a fourth hinge seat 632. The third hinge seat 631 and the fourth hinge seat 632 are spaced apart along the X direction. The third hinge seat 631 and the fourth hinge seat 632 have the same or similar structure as the first hinge seat 621.

[0207] The baffle 61, the first damping plate 62 and the second damping plate 63 are all mounted on the fixed rod 54 and are arranged in sequence along the Y direction. The first damping plate 62 is located between the baffle 61 and the second damping plate 63. In addition, the baffle 61 and the second damping plate 63 are both fixedly connected to the fixed rod 54. The first damping plate 62 is slidably connected to the fixed rod 54 and can move along the length direction of the fixed rod 54. The first hinge seat 621 and the second hinge seat 622 face the second damping plate 63, and the third hinge seat 631 and the fourth hinge seat 632 face the first damping plate 62. The damping spring 64 is installed between the baffle 61 and the first damping plate 62 and is fixedly connected to the baffle 61 and the first damping plate 62.

[0208] In this embodiment, there are two synchronous gears 53. These two synchronous gears 53 are a third gear 531 and a fourth gear 532. The third gear 531 and the fourth gear 532 are arranged side by side along the X direction and mesh with each other. The synchronous gears 53 are disposed between the two fixed rods 54 and are rotationally connected to the second damping plate 63.

[0209] The first synchronous swing arm 51 includes a first sliding body 511, a first gear 512, and a first rotating column 513. The first sliding body 511 is a plate-like structure. It is mounted in the first sliding groove 313, allowing the first synchronous swing arm 51 to be slidably connected to the first fixed frame 31. The first rotating column 513 and the first gear 512 are arranged side by side along the width of the first sliding body 511 and are both connected to one end of the first synchronous swing arm 51. A first hinge 514 is provided at the end of the first rotating column 513 facing away from the first gear 512. A third hinge 515 is provided at the end of the first gear 512 facing away from the first rotating column 513. The structure of the first hinge 514 matches that of the first hinge seat 621. The structure of the third hinge 515 matches that of the third hinge seat 631. Both the first rotating column 513 and the first gear 512 are hollow structures, with the central axes of the first rotating column 513 and the first gear 512 coinciding.

[0210] The first synchronous swing arm 51 is mounted on the first fixed rod 541. The first gear 512 and the first rotating column 513 are sleeved around the outer periphery of the first fixed rod 541 and are located between the first damping baffle 61 and the second damping baffle 61. The first gear 512 meshes with the third gear 531. The first hinge 514 is hinged to the first hinge seat 621, and the third hinge 515 is hinged to the third hinge seat 631.

[0211] The second synchronous swing arm 52 includes a second sliding body 521, a second gear 522, and a second rotating column 523. The second sliding body 521 is a plate-like structure. It is mounted in the second sliding groove 323 to allow the second synchronous swing arm 52 to be slidably connected to the second fixed frame 32. The second rotating column 523 and the second gear 522 are arranged side by side along the width of the second sliding body 521 and are both connected to one end of the second synchronous swing arm 52. A second hinge 524 is provided on the end of the second rotating column 523 facing away from the second gear 522. A fourth hinge 525 is provided on the end of the second gear 522 facing away from the second rotating column 523. The structure of the second hinge 524 matches that of the second hinge seat 622, and the structure of the fourth hinge 525 matches that of the fourth hinge seat 632. The second rotating column 523 and the second gear 522 are both hollow structures, and the central axes of the second rotating column 523 and the second gear 522 coincide.

[0212] The second synchronous swing arm 52 is mounted on the second fixed rod 542. The second gear 522 and the second rotating column 523 are sleeved around the outer periphery of the second fixed rod 542 and are located between the first damping baffle 61 and the second damping baffle 61. The second gear 522 is meshed with the fourth gear 532. The second hinge 524 is hinged to the second hinge seat 622, and the fourth hinge 525 is hinged to the fourth hinge seat 632.

[0213] Referring to Figures 5 and 6 , the first synchronization assembly 501 is mounted on the base 10. The damping member 60 and synchronization gear 53 are located within the base 10. The rotating rod is fixedly connected to the base 10. The first synchronization swing arm 51 and the second synchronization swing arm 52 are located on opposite sides of the base 10 in the X-axis. The first synchronization swing arm 51 is located in the positive direction of the X-axis of the base 10, while the second synchronization swing arm 52 is located in the negative direction of the X-axis of the base 10. The first sliding body 511 is mounted in the first slide groove 313 of the first fixed frame 31 and is slidable within the first slide groove 313. The second sliding body 521 is mounted in the second slide groove 323 of the second fixed frame 32 and is slidable within the second slide groove 323.

[0214] When the rotating mechanism 100 is in the flattened state, the first synchronous swing arm 51 and the second synchronous swing arm 52 are relatively extended, that is, the angle between the first synchronous swing arm 51 and the second synchronous swing arm 52 is approximately 180°. When the rotating mechanism 100 is in the folded state, the first synchronous swing arm 51 and the second synchronous swing arm 52 are relatively folded, that is, the first synchronous swing arm 51 and the second synchronous swing arm 52 are arranged approximately parallel to each other.

[0215] When the first fixed frame 31 rotates relative to the base 10, it drives the first sliding body 511 to rotate relative to the base 10 while simultaneously sliding within the first sliding groove 313. When the first sliding body 511 rotates relative to the base 10, it drives the first rotating column 513 and the first gear 512 to rotate about the first rotating rod. The rotation of the first gear 512 drives the third gear 531 to rotate, which in turn drives the fourth gear 532 to rotate, which in turn drives the second gear 522 to rotate about the second rotating rod. The rotation of the second gear 522 drives the second sliding body 521 to rotate relative to the base 10, causing it to slide within the second sliding groove 323 and simultaneously driving the second fixed frame 32 to rotate relative to the base 10, thereby achieving synchronized rotation of the first and second synchronized swing arms 51 and 52, as well as synchronized rotation of the first and second fixed frames 31 and 32. The first and second synchronized swing arms 51 and 52 rotate in opposite directions, and the first and second fixed frames 31 and 32 rotate in opposite directions.

[0216] When the first synchronous swing arm 51 rotates about the first rotating rod, it drives the first hinge 514 and the third hinge 515 to rotate. The third hinge 515 repeatedly abuts the third hinge seat 631, and the first hinge 514 repeatedly abuts the first hinge seat 621. When the second synchronous swing arm 52 rotates about the second rotating rod, it drives the second hinge 524 and the fourth hinge 525 to rotate. The fourth hinge 525 repeatedly abuts the fourth hinge seat 632, and the second hinge 524 repeatedly abuts the second hinge seat 622. The first hinge 514 and the second hinge 524 repeatedly push the first damping baffle 61 toward the damping spring 64, repeatedly compressing the damping spring 64, causing the damping spring 64 to generate elastic force. The elastic restoring force of the damping spring 64 acts on the first synchronous swing arm 51 and the second synchronous swing arm 52, thereby providing a damping force for the rotation of the first synchronous swing arm 51 and the second synchronous swing arm 52. The damping force of the first synchronous swing arm 51 acts on the first shell 210 through the first fixed frame 31, and the damping force of the second synchronous swing arm 52 acts on the second shell 220 through the second fixed frame 32, thereby providing a damping feel to the user.

[0217] In this embodiment, by setting up a synchronization component 50, and when the first synchronization swing arm 51 rotates, the second synchronization swing arm 52 can be driven to rotate through the synchronization gear 53, so that the first synchronization swing arm 51 and the second synchronization swing arm 52 can be rotated synchronously, and then the rotation mechanism 100 and the foldable electronic device 1000 can be rotated synchronously, so as to facilitate user use and enhance the user experience.

[0218] In this embodiment, by setting a damping member 60, and when the first synchronous swing arm 51 and the second synchronous swing arm 52 rotate relative to the base 10, the damping member 60 always presses against the first synchronous swing arm 51 and the second synchronous swing arm 52 to generate a damping force, thereby providing a damping feel to the user and improving the user's usage experience.

[0219] The above are only some of the embodiments and implementations of this application. The scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A rotating mechanism, characterized in that: include: A base, a first main swing arm, and a second main swing arm; The base is provided with a first rotation groove and a second rotation groove, and the first rotation groove and the second rotation groove are arranged opposite to each other along the width direction of the rotation mechanism; the base includes a first stop surface, the first stop surface is located in the first rotation groove, and the plane where the first stop surface is located intersects with the width direction of the base; The first main swing arm comprises a second stop surface, and the plane where the second stop surface is located intersects with the width direction of the base; The first main swing arm is installed in the first rotation groove, the second stop surface faces the first rotation groove, and the first main swing arm can rotate and slide along the first rotation groove; The second main swing arm is installed in the second rotation groove, and the second main swing arm can rotate and slide along the second rotation groove; When the first main swing arm is unfolded relative to the base, the first stop surface and the second stop surface are arranged opposite to each other, and the first main swing arm and the base are stopped along the width direction of the base, and the first main swing arm and the second main swing arm can be rotated in a direction approaching each other so that the first main swing arm can be folded relative to the second main swing arm.

2. The rotating mechanism according to claim 1, characterized in that: When the first main swing arm is unfolded relative to the base, the first stop surface and the second stop surface abut against each other, and the direction of the abutting force between the first stop surface and the second stop surface is consistent with the width direction of the base.

3. The rotating mechanism according to claim 2, characterized in that: The first rotation groove comprises a first inner wall, the first inner wall is arranged facing away from the second rotation groove, and the first inner wall comprises the first stop surface; The base further includes a first guide rail, which is fixed to the first inner wall and extends in a direction away from the second rotation groove, and the first guide rail is arranged side by side with the first stop surface; The first main swing arm comprises a first end, the first main swing arm is provided with a first groove, the opening of the first groove is located on the top surface or the bottom surface of the first main swing arm, and the first groove runs through the first end; When the first main swing arm is installed on the base, the first end faces the first rotation groove, at least part of the first guide rail is located in the first groove, and the first main swing arm can rotate and slide in the first rotation groove along the first guide rail.

4. The rotating mechanism according to claim 3, characterized in that: The first guide rail and the first stop surface are arranged side by side along the length direction of the base; the opening of the first groove is located on the bottom surface of the first main swing arm, and the second stop surface is arranged on the side wall of the first groove and faces the first end; When the first main swing arm is installed on the base, the first guide rail is located on the side of the top surface of the first groove facing away from the base, and the top surface of the first guide rail is opposite to and in contact with the bottom wall surface of the groove.

5. The rotating mechanism according to claim 3, characterized in that: The first guide rail and the first stop surface are arranged side by side along the thickness direction of the base, and the first guide rail is located on the side of the first stop surface close to the top surface of the base; the opening of the first groove is located on the top surface of the first main swing arm, and the second stop surface is arranged at the first end and connected between the bottom surface of the first main swing arm and the bottom wall surface of the first groove; When the first main swing arm is installed on the base, the first guide rail is located on a side of the first groove close to the top surface of the base, and the bottom surface of the first guide rail is opposite to and in contact with the bottom wall surface of the groove.

6. The rotating mechanism according to claim 3, characterized in that: The first stop surface includes a first sub-stop surface, and the first sub-stop surface is arranged side by side with the first guide rail along the thickness direction of the base, and the first sub-stop surface is located on a side of the first guide rail close to the top surface of the base; The opening of the first groove is located at the bottom surface of the first main swing arm, and the second stop surface includes a second sub-stop surface, which is arranged at the first end and connected between the top surface of the first main swing arm and the bottom wall surface of the first groove; When the first main swing arm is installed on the base, the first guide rail is located on a side of the first groove facing away from the top surface of the base, and the top surface of the first guide rail is opposite to and in contact with the bottom wall surface of the first groove; When the first main swing arm is unfolded relative to the base, the first sub-stop surface is arranged opposite to the second sub-stop surface.

7. The rotating mechanism according to claim 6, characterized in that: The first stop surface further includes a third sub-stop surface, which is arranged side by side with the first guide rail along the length direction of the base; the first main swing arm further includes a fourth sub-stop surface, which is arranged on the side wall of the first groove and faces the first end; When the first main swing arm is unfolded relative to the base, the third sub-stop surface is arranged opposite to the fourth sub-stop surface.

8. The rotating mechanism according to claim 3, characterized in that: The first stop surface includes a first sub-stop surface, and the first guide rail and the first sub-stop surface are arranged side by side along the length direction of the base; The second stop surface includes a second sub-stop surface, and the second sub-stop surface is provided at one end of the first main swing arm and connected between the top surface of the first main swing arm and the bottom surface of the first main swing arm; When the first main swing arm is unfolded relative to the base, the first sub-stop surface is arranged opposite to the second sub-stop surface.

9. The rotating mechanism according to claim 8, characterized in that: The first stop surface further includes a third sub-stop surface, and along the length direction of the base, the third sub-stop surface is arranged side by side with the first stop surface and the first guide rail, and the third sub-stop surface is located between the first sub-stop surface and the first guide rail; The opening of the first groove is located at the bottom surface of the first main swing arm; the second stop surface further includes a fourth sub-stop surface, the fourth sub-stop surface is arranged on the side wall of the first groove and faces the first end; When the first main swing arm is installed on the base, the first guide rail is located on a side of the first groove facing away from the top surface of the base, and the top surface of the first guide rail is opposite to and in contact with the bottom wall surface of the first groove; When the first main swing arm is unfolded relative to the base, the third sub-stop surface is arranged opposite to the fourth sub-stop surface.

10. The rotating mechanism according to any one of claims 1 to 9, characterized in that: The first stop surface and the second stop surface are interference fit.

11. The rotating mechanism according to claim 10, characterized in that: The interference between the first stop surface and the second stop surface is 0 mm to 0.1 mm.

12. The rotating mechanism according to any one of claims 1 to 9, characterized in that: The rotating mechanism further includes a wear-resistant layer, and the wear-resistant layer is arranged on the first stop surface and / or the second stop surface.

13. The rotating mechanism according to any one of claims 1 to 9, characterized in that: The rotating mechanism has a folded state and an unfolded state. When the rotating mechanism switches from the unfolded state to the folded state, the first main swing arm rotates along a first direction. When the rotating mechanism is in the unfolded state, the first main swing arm and the base stop in a second direction; wherein the second direction is opposite to the first direction.

14. The rotating mechanism according to any one of claims 1 to 9, characterized in that: The base includes an axle cover and a support plate, wherein the axle cover and the support plate are stacked and fixedly connected to each other; when the first main swing arm and the second main swing arm are relatively unfolded, the top surface of the first main swing arm and the top surface of the second main swing arm are both flush with the surface of the support plate facing away from the axle cover.

15. A foldable electronic device, characterized in that: It includes a first shell, a second shell, a display screen and a rotating mechanism as described in any one of claims 1 to 14, wherein the rotating mechanism is connected between the first shell and the second shell, and the display screen is installed on the first shell, the second shell and the rotating mechanism, and when the rotating mechanism rotates, the first shell and the second shell rotate relative to each other to drive the display screen to bend or unfold.

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