Folding mechanism and foldable mobile terminal

Abstract

The embodiment of the invention relates to the technical field of mobile terminals, and provides a folding mechanism and a foldable mobile terminal.The folding mechanism comprises a first support, the first support is provided with a first sliding groove surface and a second sliding groove surface, and the first sliding groove surface and the second sliding groove surface are both arc-shaped surfaces and are coaxially arranged; the first sliding groove face and the second sliding groove face are arranged in the axis direction of the first sliding groove face in a spaced mode. The two faces of the first swing arm make contact with the first sliding groove face and the second sliding groove face correspondingly and are in running fit with the first sliding groove face and the second sliding groove face. According to the folding mechanism and the foldable mobile terminal provided by the embodiment of the invention, the motion precision of the first swing arm can be improved; the first support is integrally arranged, the number of parts is reduced, assembly procedures are few, assembly is easy, and the manufacturing and assembly cost is effectively reduced.

Description

Folding mechanism and foldable mobile terminal

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on March 20, 2023, with application number 202310305448.3 and application name “Folding mechanism and foldable mobile terminal”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of mobile terminals, and in particular to a folding mechanism and a foldable mobile terminal. Background Art

[0003] With the development of flexible screen technology, foldable mobile terminals have emerged. These terminals typically include a left housing, a right housing, a folding mechanism, and a flexible screen. The flexible screen covers the left and right housings, and both housings can rotate relative to the folding mechanism to fold together or unfold.

[0004] In current technology, the folding mechanism primarily consists of a main frame, a swing arm, and left and right door panels. The left and right door panels are pivotally connected to the main frame via the swing arm, while the left and right housings are fixed to the left and right door panels, respectively. Folding mechanisms are typically assembled from numerous components, resulting in a complex structure. The accumulated tolerances of these components can affect the swing arm's motion accuracy.

[0005] Summary of the Invention

[0006] Embodiments of the present application provide a folding mechanism and a foldable mobile terminal, which are used to improve the movement accuracy of a swing arm in the folding mechanism.

[0007] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0008] An embodiment of a first aspect of the present application provides a folding mechanism, the folding mechanism comprising:

[0009] A first bracket, wherein a first chute surface and a second chute surface are integrally provided on the first bracket, wherein the first chute surface and the second chute surface are both arc-shaped surfaces and are coaxially arranged, and the first chute surface and the second chute surface are spaced apart along the axis direction of the first chute surface;

[0010] The first swing arm has two surfaces that are in contact with the first chute surface and the second chute surface respectively and are rotationally matched.

[0011] The above technical solutions in the embodiments of the present application have at least the following technical effects or advantages:

[0012] The folding mechanism provided in an embodiment of the present application includes a first bracket and a first swing arm. The first bracket is provided with a first and a second coaxially spaced-apart groove surface. Two surfaces of the first swing arm respectively contact and rotate with the first and second groove surfaces. The first swing arm is rotatably connected to the first bracket via a virtual axis connection, allowing the first swing arm to rotate relative to the first and second groove surfaces, thereby folding or unfolding the first swing arm relative to the first bracket. The folding mechanism enables the first swing arm to rotate about a fixed axis, thereby improving the motion accuracy of the first swing arm. Furthermore, the folding mechanism simultaneously provides the first and second groove surfaces, which mate with the first swing arm, on the first bracket, facilitating manufacturing and facilitating control of the coaxiality between the groove surfaces. This prevents the cumulative tolerances of various components from affecting the motion accuracy of the swing arm and alleviates the problem of insufficient overlap. The first and second groove surfaces are integrally provided on the first bracket, reducing the number of parts, simplifying assembly, and simplifying assembly. Therefore, the folding mechanism has a simple structure and improves the motion accuracy of the first swing arm. Furthermore, the integrated design of the first bracket reduces the number of parts and assembly steps, effectively reducing manufacturing and assembly costs.

[0013] In some embodiments, the radii of the first chute surface and the second chute surface are different, so as to facilitate contacting the two surfaces of the first swing arm with the first chute surface and the second chute surface respectively.

[0014] In some embodiments, the first swing arm has a first end, and two opposing surfaces of the first end include a first mating portion and a second mating portion, respectively. The first mating portion and the second mating portion are both arcuate surfaces. The first mating portion slidably engages with the first chute surface, and the second mating portion slidably engages with the second chute surface. By providing the first mating portion and the second mating portion, the motion trajectory of the first swing arm can be restricted from two sides, making the motion of the first swing arm smoother.

[0015] In some embodiments, the first end is provided with at least two first mating portions, which are spaced apart along the axis of the first chute surface and disposed on either side of the second mating portion. There are multiple first chute surfaces, and each first mating portion slidably engages with a corresponding first chute surface. The presence of first mating portions on both sides of the first end balances force on both sides of the first swing arm, improving stability during movement.

[0016] In some embodiments, the first bracket is further provided with a limiting surface, and the first slide groove surface is opposite to and spaced from the limiting surface to form a receiving space, and the first engaging portion is rotatably received in the receiving space. The provision of the limiting surface can further enhance the limiting effect on the motion trajectory of the first swing arm, thereby maintaining the motion accuracy of the first swing arm.

[0017] In some embodiments, the first bracket is provided with a forming process slot, the forming process slot being arranged opposite to the first chute surface or the second chute surface. The provision of the forming process slot facilitates the integral formation of the first chute surface and the second chute surface on the first bracket, thereby achieving higher forming precision of the chute surfaces.

[0018] In some embodiments, the first bracket includes a first bracket body and a first boss provided on the first bracket body, and the first slide groove surface is provided on one side of the first boss; the first bracket body is provided with the molding process slot hole arranged opposite to the first slide groove surface.

[0019] In some embodiments, the first bracket further includes a second boss disposed on one side of the first bracket body, and the second slide groove surface is disposed on one side of the second boss.

[0020] In some embodiments, the first bracket includes a first side portion and a second side portion, the first side portion and the second side portion are respectively located on both sides of a center line of the first bracket, and the first side portion is provided with the first slide groove surface having a first axis, and the second side portion is provided with the first slide groove surface and the second slide groove surface having a second axis, the center line of the first bracket is parallel to the axis of the first slide groove surface and the axis of the second slide groove surface; the folding mechanism includes at least two first swing arms, and at least two first swing arms are respectively rotatably connected to the first side portion and the second side portion.

[0021] In some embodiments, the first bracket is provided with a first stop structure, the first stop structure being used to stop the first swing arm when the first swing arm is in an unfolded state or a folded state. By providing the first stop structure, the rotation angle of the first swing arm can be limited.

[0022] In some embodiments, a first mounting hole is provided on the first swing arm; the first stop structure includes a first stop block provided on the first bracket, the first stop block is passed through the first mounting hole, and the first stop block is used to support the first swing arm when the first swing arm is in an unfolded state or a folded state.

[0023] In some embodiments, the first bracket has an inner surface and an outer surface disposed opposite to each other, the first swing arm is folded in a direction away from the outer surface, and a second mounting hole is provided on the first bracket;

[0024] The first stop structure includes a first stop block provided on the first bracket, the first stop block is accommodated in the second mounting hole, the first stop block has a first stop surface facing away from the inner surface, and the first stop surface is used to support the first swing arm when the first swing arm is in the expanded state.

[0025] In some embodiments, the first stop structure includes a second stop surface provided on an edge of the first bracket, and the second stop surface is used to abut against the first swing arm when the first swing arm is in an expanded state.

[0026] In some embodiments, the folding mechanism further includes a second swing arm rotatably connected to the first bracket, and the first swing arm and the second swing arm are spaced apart along the center line direction of the first bracket.

[0027] In some embodiments, the second swing arm is rotatably connected to the first bracket via a rotating shaft and a rotating shaft hole; wherein the rotating shaft hole is formed on the first bracket, and the inner surface of the rotating shaft hole is an integrally formed cylindrical surface; or, the rotating shaft is integrally formed on the first bracket. The rotating shaft or the rotating shaft hole does not need to be divided into two mutually aligned parts formed on two separate components, and the second swing arm can rotate about a predetermined rotation axis with high motion precision.

[0028] In some embodiments, a third slide groove surface and a fourth slide groove surface are further provided on the first bracket, and the third slide groove surface and the fourth slide groove surface are coaxially arranged and are both arc-shaped surfaces; the second swing arm contacts and rotates with the third slide groove surface and the fourth slide groove surface on two opposite surfaces respectively.

[0029] In some embodiments, the third slide groove surface and the fourth slide groove surface are spaced apart along the axial direction of the third slide groove surface; the second swing arm is provided with a third matching portion and a fourth matching portion on two opposite surfaces, respectively, the third matching portion is in contact with and slides with the third slide groove surface, and the fourth matching portion is in contact with and slides with the fourth slide groove surface.

[0030] In some embodiments, a third stop surface and a fourth stop surface are provided on the first bracket, the third stop surface is used to abut the second swing arm when the second swing arm is in an unfolded state, and the fourth stop surface is used to abut the second swing arm when the second swing arm is in a folded state.

[0031] In some embodiments, a second stop block is provided on the second swing arm, and the second stop block is used to abut against the fourth stop surface when the second swing arm is in a folded state.

[0032] In some embodiments, the folding mechanism also includes a second bracket fixedly connected to the first bracket, and the connection method between the first bracket and the second bracket includes one or more of bonding, welding, snap connection, interference fit connection and fastener connection; wherein, the second bracket is used to support the first bracket, or the second bracket is used to connect a connecting plate together with the first bracket.

[0033] In some embodiments, one of the first bracket and the second bracket is provided with a positioning pin, and the other is provided with a positioning hole, wherein the positioning hole is a through hole or a blind hole; the positioning pin is inserted into the positioning hole.

[0034] In some embodiments, the positioning pin is welded in the positioning hole, and the positioning hole is also used to accommodate welding slag.

[0035] In some embodiments, a screw column is provided on the second bracket, and a through hole is provided on the first bracket. The screw column passes through the through hole and is used to install a nut.

[0036] In some embodiments, the second bracket is arranged on the side of the first bracket facing away from the first swing arm and the second bracket is an axis cover. The first bracket is provided with a positioning surface and a glue dispensing groove on the side facing the second bracket. The positioning surface is used to support the second bracket. The glue dispensing groove is recessed relative to the positioning surface and is used to accommodate the colloid.

[0037] In some embodiments, a screen water drop avoidance groove is provided on a surface of the first bracket facing away from the second bracket, and the screen water drop avoidance groove is used to adapt to the screen in the folded state.

[0038] In some embodiments, the second bracket is fixedly connected to one side of the first bracket along the center line direction of the first bracket, and a fourth swing arm is rotatably connected to the second bracket.

[0039] In some embodiments, the outer surface of the first bracket is a curved surface, and the curved surface is used to adapt to the screen in the folded state.

[0040] In some embodiments, a support platform is provided on the surface of the first bracket, and the support platform is used to support a connecting plate connected to the swing arm when the first swing arm is in an expanded state.

[0041] In some embodiments, at least one side of the first bracket is provided with a weight-reducing groove.

[0042] An embodiment of the second aspect of the present application proposes a foldable mobile terminal, comprising a first shell, a second shell and a screen, wherein the screen covers the first shell and the second shell, and the foldable mobile terminal also includes the folding mechanism as described in the first aspect, and the first shell and the second shell are opened or closed by the folding mechanism.

[0043] The beneficial effects of the terminal device provided by the embodiment of the present application relative to the prior art are similar to the beneficial effects of the folding mechanism provided by the embodiment of the first aspect of the present application relative to the prior art, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] FIG1 is a schematic structural diagram of a foldable mobile terminal in an unfolded state provided by an embodiment of the present application;

[0045] FIG2 is a schematic structural diagram of the foldable mobile terminal shown in FIG1 in a folded state;

[0046] FIG3 is a perspective schematic diagram of a folding mechanism in an unfolded state provided by an embodiment of the present application;

[0047] FIG4 is a partial schematic diagram of the folding mechanism shown in FIG3 ;

[0048] FIG5 is a perspective schematic diagram of the folding mechanism shown in FIG3 in a semi-expanded state;

[0049] FIG6 is a perspective schematic diagram of the folding mechanism shown in FIG3 in a folded state;

[0050] FIG7 is a perspective exploded schematic diagram of the folding mechanism shown in FIG3 ;

[0051] FIG8 is a perspective schematic diagram of the first bracket in the folding mechanism shown in FIG3 ;

[0052] FIG9 is a perspective schematic diagram of the first bracket shown in FIG8 from another angle;

[0053] FIG10 is a perspective schematic diagram of the first bracket shown in FIG8 from another angle;

[0054] FIG11 is a perspective schematic diagram of the first swing arm in the folding mechanism shown in FIG3 ;

[0055] FIG12 is a perspective schematic diagram of the first swing arm shown in FIG11 from another angle;

[0056] FIG13 is a cross-sectional view of the folding mechanism shown in FIG3 along the first matching portion in the unfolded state;

[0057] FIG14 is a cross-sectional view of the folding mechanism shown in FIG3 along the first matching portion in the folded state;

[0058] FIG15 is a cross-sectional view of the folding mechanism shown in FIG3 along the second matching portion in the unfolded state;

[0059] FIG16 is a cross-sectional view of the folding mechanism shown in FIG3 along the second matching portion in the folded state;

[0060] FIG17 is a cross-sectional view of the folding mechanism shown in FIG6 along the first stop block;

[0061] FIG18 is a cross-sectional view of the folding mechanism shown in FIG3 along the first swing arm;

[0062] FIG19 is a cross-sectional view of the folding mechanism shown in FIG3 along the second swing arm;

[0063] FIG20 is a cross-sectional view of the folding mechanism shown in FIG6 along the second swing arm;

[0064] FIG21 is a schematic diagram of the assembly of the first bracket and the second bracket in the folding mechanism shown in FIG3;

[0065] FIG22 is a cross-sectional view of the first bracket and the second bracket shown in FIG21 along line AA;

[0066] FIG23 is a partial schematic diagram of the folding mechanism shown in FIG3 ;

[0067] FIG24 is a side view of the folding mechanism shown in FIG6;

[0068] FIG25 is a perspective schematic diagram of a folding mechanism in an unfolded state provided by another embodiment of the present application;

[0069] FIG26 is a perspective schematic diagram of the folding mechanism shown in FIG25 in a folded state;

[0070] FIG27 is an exploded perspective view of the folding mechanism shown in FIG25;

[0071] FIG28 is a perspective schematic diagram of the first bracket in the folding mechanism shown in FIG25;

[0072] FIG29 is a perspective schematic diagram of the first bracket shown in FIG28 from another angle;

[0073] FIG30 is a perspective schematic diagram of the first bracket shown in FIG28 from another angle;

[0074] FIG31A is a top view of the first bracket shown in FIG28;

[0075] FIG31B is a bottom view of the first bracket shown in FIG28;

[0076] FIG32 is a perspective schematic diagram of the first swing arm in the folding mechanism shown in FIG27;

[0077] FIG33 is a perspective schematic diagram of the first swing arm shown in FIG32 from another angle;

[0078] FIG34 is a perspective schematic diagram of the second swing arm in the folding mechanism shown in FIG27;

[0079] FIG35 is a perspective schematic diagram of the second swing arm shown in FIG34 from another angle;

[0080] FIG36 is a cross-sectional view of the folding mechanism shown in FIG25 along the first chute surface in the unfolded state;

[0081] FIG37 is a cross-sectional view of the folding mechanism shown in FIG25 along the first chute surface in the folded state;

[0082] FIG38 is a cross-sectional view of the folding mechanism shown in FIG25 along the second chute surface in the unfolded state;

[0083] FIG39 is a cross-sectional view of the folding mechanism shown in FIG25 along the second chute surface in the folded state;

[0084] FIG40 is a cross-sectional view of the folding mechanism shown in FIG25 along the third chute surface in the unfolded state;

[0085] FIG41 is a cross-sectional view of the folding mechanism shown in FIG25 along the third chute surface in the folded state;

[0086] FIG42 is a cross-sectional view of the folding mechanism shown in FIG25 along the fourth chute surface in the unfolded state;

[0087] FIG43 is a cross-sectional view of the folding mechanism shown in FIG25 along the fourth chute surface in the folded state;

[0088] FIG44 is a cross-sectional view of the folding mechanism shown in FIG25 along the first stop block in the unfolded state;

[0089] FIG45 is a cross-sectional view of the folding mechanism shown in FIG25 along the third stop surface in the unfolded state;

[0090] FIG46 is a cross-sectional view of the folding mechanism shown in FIG25 along the fourth stop surface in the folded state;

[0091] FIG47 is a schematic diagram of the connection between the first bracket and the second bracket in the folding mechanism shown in FIG25;

[0092] FIG48 is a cross-sectional view of the first bracket and the second bracket shown in FIG47 along line BB.

[0093] 14. The figures in the figure are as follows: 1000, foldable mobile terminal; 100, folding mechanism; 200, screen; 300, first housing; 400, second housing; 10, first bracket; 10a, first side portion; 10b, second side portion; 101, outer surface; 11, first bracket body; 12, first boss; 121, raised portion; 122, extension portion; 13, second boss; 111, positioning surface; 112, glue dispensing groove; 113, supporting platform; 115, second mounting hole; 141, first slide groove surface; 142, second slide groove surface; 143, shaft hole; 144, third slide groove surface; 145, fourth slide groove surface; 146, limiting surface; 15, molding process slot; 16, through hole; 17, screen water drop avoidance groove; 18, weight reduction groove; 20. First swing arm; 21. First end; 22. Second end; 211. First surface; 2111. First matching portion; 212. Second surface; 2121. Second matching portion; 23. First mounting hole; 30. Second swing arm; 311. Third matching portion; 312. Fourth matching portion; 313. Damping structure; 41. Third swing arm; 42. Fourth swing arm; 51. First stop block; 511. First stop surface; 52. Second stop surface; 60. Second stop structure; 61. Third stop surface; 62. Fourth stop surface; 63. Second stop block; 70. Second bracket; 71. Positioning pin; 72. Positioning hole; 73. Screw column; 74. Nut; 75. Fastening screw; 80. Connecting plate. DETAILED DESCRIPTION

[0094] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0095] In the description of this application, it should be understood that the terms "length", "width", "thickness", "top", "bottom", "inside", "outside", "up", "down", "left", "right", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this application.

[0096] The terms "first," "second," "third," and "fourth," etc., are used solely for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. For example, the terms "first pushing portion" and "second pushing portion" are used solely to distinguish between the different pushing portions and do not define their order. The first pushing portion could also be named the second pushing portion, and the second pushing portion could also be named the first pushing portion without departing from the scope of the various described embodiments. Furthermore, the terms "first," "second," "third," and "fourth," etc., do not necessarily define the features being referred to as different.

[0097] In this application, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0098] In this application, "and / or" is simply a way to describe the relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0099] It should be noted that, in this application, words such as "in one embodiment," "exemplarily," and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "in one embodiment," "exemplarily," or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "in one embodiment," "exemplarily," and "for example" is intended to present the relevant concepts in a concrete manner.

[0100] In order to make the objectives, technical solutions and advantages of this application more clear, this application is further described in detail below with reference to the accompanying drawings and embodiments.

[0101] In current technology, the folding mechanism mainly includes a main bracket, a swing arm, a left door panel and a right door panel. The left door panel and the right door panel are respectively connected to the two sides of the main bracket through the swing arm rotation, and the left shell and the right shell are respectively fixed to the left door panel and the right door panel. The folding mechanism is generally assembled from many parts and has a complex structure. The cumulative tolerance of each component will affect the movement accuracy of the swing arm. For example, the main bracket includes a support and a cover plate that are assembled together. The structure that cooperates with the swing arm rotation (such as the rotating shaft hole) is divided into two opposing parts, which are respectively processed on the support and the cover plate. The coaxiality of the two parts is difficult to control, which in turn affects the movement accuracy of the swing arm.

[0102] In view of this, embodiments of the present application provide a folding mechanism and a foldable mobile terminal, which can improve the technical problem of low swing arm motion accuracy of the hinge mechanism in the related art.

[0103] The foldable mobile terminal 1000 provided in the embodiment of the present application can be a mobile phone, a tablet computer, a wearable device, an in-vehicle device, an augmented reality (AR) / virtual reality (VR) device, a laptop computer, an ultramobile personal computer (UMPC), a netbook, a personal digital assistant (PDA), or other foldable mobile terminal product with a flexible screen. The embodiment of the present application does not limit the specific type of the foldable mobile terminal. In the embodiment of the present application, the mobile terminal 1000 is described as a mobile phone.

[0104] Please refer to Figures 1 and 2. Figure 1 shows a schematic diagram of the structure of a foldable mobile terminal 1000 in an unfolded state according to one embodiment of the present application, and Figure 2 shows a schematic diagram of the structure of the foldable mobile terminal 1000 in a folded state. The foldable mobile terminal 1000 includes a folding mechanism 100, a screen 200, a first housing 300, and a second housing 400. The folding mechanism 100 is connected between the first housing 300 and the second housing 400. The screen 200 is located on the surfaces of the first housing 300, the second housing 400, and the folding mechanism 100 and is fixed to the first housing 300 and the second housing 400, respectively. The screen 200 is a flexible screen that can be bent. The foldable mobile terminal 1000 can use the folding mechanism 100 to rotate the first housing 300 and the second housing 400 relative to each other, thereby opening or closing the first housing 300 and the second housing 400, thereby achieving the folding and unfolding of the foldable mobile terminal 1000.

[0105] Figure 1 shows the structure of the foldable mobile terminal 1000 in the unfolded state, with the first housing 300 and the second housing 400 lying approximately in the same plane, and the screen 200 lying flat on the surfaces of the first housing 300, the second housing 400, and the folding mechanism 100. It will be appreciated that in some embodiments, when the foldable mobile terminal 1000 is in the unfolded state, the first housing 300 and the second housing 400 may also have a certain angle, in which case the screen 200 is not unfolded.

[0106] Figure 2 shows a schematic diagram of the structure of the foldable mobile terminal 1000 in a folded state. The first housing 300 and the second housing 400 are substantially parallel to each other, and the screen 200 is folded in the space enclosed by the first housing 300, the second housing 400, and the folding mechanism 100. It will be appreciated that in some embodiments, the structure of the foldable mobile terminal 1000 in the folded state is not limited to this. For example, the screen 200 may also be located outside the first housing 300, the second housing 400, and the folding mechanism 100.

[0107] Embodiment 1 of the first aspect of the present application provides a folding mechanism 100. Referring to Figures 3 to 7, the folding mechanism 100 includes a first bracket 10 and a first swing arm 20. The first swing arm 20 is rotatably connected to one side of the first bracket 10 and can be folded or unfolded relative to the first bracket 10.

[0108] Please refer to Figures 8 and 9. The first bracket 10 is integrally provided with a first slide groove surface 141 and a second slide groove surface 142. The first slide groove surface 141 and the second slide groove surface 142 are both arc-shaped surfaces and are coaxially arranged. The first slide groove surface 141 and the second slide groove surface 142 are spaced apart along the axial direction of the first slide groove surface 141; please refer to Figures 11 to 16. The two surfaces of the first swing arm 20 are respectively in contact with the first slide groove surface 141 and the second slide groove surface 142 and rotate in cooperation.

[0109] The first chute surface 141 and the second chute surface 142 are integrally provided on the first bracket 10, eliminating the need for additional components to be assembled to the first bracket 10, thereby reducing the number of components and the number of assembly steps. The first bracket 10 can be an integrally molded structure. It is understood that if the first bracket 10 includes other structures, at least the first chute surface 141 and the second chute surface 142 are integrally provided on the first bracket 10.

[0110] Both the first chute surface 141 and the second chute surface 142 are arcuate surfaces. A curved surface can consist of a single arcuate portion with a predetermined radius, in which case the curved surface is a portion of a cylindrical surface; or it can consist of multiple connected arcuate portions, in which case the curved surface is a curved surface. Furthermore, the curved surface can be smooth or have friction structures such as protrusions. The curvature of the first chute surface 141 and the second chute surface 142 can be the same or different, and can be adjusted based on specific needs.

[0111] The first and second chute surfaces 141, 142 are coaxially arranged, meaning that the axis of the first chute surface 141 coincides with the axis of the second chute surface 142. The first and second chute surfaces 141, 142 are located on opposite sides of the first swing arm 20, providing a sliding guide and position limiter for the first swing arm 20, preventing it from separating from the first bracket 10. Furthermore, because the first and second chute surfaces 141, 142 are coaxially arranged, the first swing arm 20 can rotate about the axis of the first and second chute surfaces 141, 142.

[0112] In Figure 8, the direction L1 is the axial direction of the first chute surface 141, which is also the axial direction of the second chute surface 142. The first chute surface 141 and the second chute surface 142 are not arranged directly opposite each other, but are spaced apart along the axial direction of the first chute surface 141. Accordingly, the contact portions between the first swing arm 20 and the first chute surface 141, as well as the contact portions between the first swing arm 20 and the second chute surface 142, are also spaced apart along the axial direction of the first chute surface 141. The first chute surface 141 and the second chute surface 142 respectively face opposite sides of the first swing arm 20 to limit the position of the first swing arm 20 from both sides. The first chute surface 141 and the second chute surface 142 can have the same protrusion direction. Furthermore, the arc vertices of the first chute surface 141 and the second chute surface 142 can be arranged parallel to the direction of the line connecting the axis.

[0113] In this way, the first sliding groove surface 141 and the second sliding groove surface 142 can provide guidance for the rotation of the first swing arm 20 within a certain length along the axial direction of the first sliding groove surface 141 .

[0114] The first swing arm 20 is connected to the first bracket 10 through a virtual axis connection. The axis of the first slide groove surface 141 and the second slide groove surface 142 is the rotation axis of the first swing arm 20. The "virtual axis" is different from the physical axis, and there is no need to set an actual rotating shaft element. The first swing arm 20 realizes rotation relative to the first bracket 10 through the rotational cooperation relationship with the first slide groove surface 141 and the second slide groove surface 142.

[0115] Referring to Figures 11 to 16 , the two opposing surfaces of the first swing arm 20 respectively contact and rotate with the first chute surface 141 and the second chute surface 142. Specifically, the two opposing surfaces of the first swing arm 20 are a first surface 211 and a second surface 212. As shown in Figures 13 and 14 , the first swing arm 20 contacts and rotates with the first chute surface 141 via the first surface 211. As shown in Figures 15 and 16 , the first swing arm 20 contacts and rotates with the second chute surface 142 via the second surface 212.

[0116] During use, a portion of the first swing arm 20 is positioned between the first and second chute surfaces 141, 142. The two surfaces of the first swing arm 20 rotate relative to the first and second chute surfaces 141, 142, respectively, to fold or unfold the first swing arm 20 relative to the first bracket 10. In the unfolded state, as shown in Figures 13 and 15, the first swing arm 20 is unfolded relative to one side of the first bracket 10; in the folded state, as shown in Figures 14 and 16, the first swing arm 20 is folded above the first bracket 10. It will be appreciated that the unfolding and folding angles of the first swing arm 20 can be set as needed.

[0117] The folding mechanism 100 provided in the embodiment of the present application includes a first bracket 10 and a first swing arm 20. The first bracket 10 is provided with a first and second chute surfaces 141 and 142 that are coaxial and spaced apart. The two surfaces of the first swing arm 20 are in contact with and rotationally engage with the first and second chute surfaces 141 and 142, respectively. As a result, the first swing arm 20 can rotate relative to the first and second chute surfaces 141 and 142, allowing the first swing arm 20 to fold or unfold relative to the first bracket 10. The first swing arm 20 is connected to the first bracket 10 via a virtual axis. The folding mechanism 100 enables the first swing arm 20 to rotate about a fixed axis, improving the motion accuracy of the first swing arm 20 and alleviating the problem of insufficient swing arm overlap. At the same time, the folding mechanism 100 simultaneously incorporates the first chute surface 141 and the second chute surface 142, which mate with the first swing arm 20, on the first bracket 10. This facilitates machining and facilitates controlling the coaxiality between the chute surfaces, preventing the cumulative tolerances of the various components from affecting the swing arm's motion accuracy. The first chute surface 141 and the second chute surface 142 are integrally provided on the first bracket 10, reducing the number of parts, simplifying assembly steps, and simplifying assembly. Therefore, the folding mechanism 100 has a simple structure and improves the motion accuracy of the first swing arm 20. The integrated design of the first bracket 10 reduces the number of parts and assembly steps, effectively reducing manufacturing and assembly costs.

[0118] In some embodiments, the radii of the first sliding groove surface 141 and the second sliding groove surface 142 are different.

[0119] Because the first swing arm 20 has a certain thickness, the radii of the first chute surface 141 and the second chute surface 142 are different, so that the two sides of the first swing arm 20 contact the first chute surface 141 and the second chute surface 142 respectively. It can be understood that the arcuate surface on which the first chute surface 141 and the arcuate surface on which the second chute surface 142 are located together form an arcuate space, which is used to accommodate one end of the first swing arm 20 and allow the first swing arm 20 to rotate within the arcuate space. The arcuate surface on which the first chute surface 141 is located refers to the arcuate surface formed by the first chute surface 141 extending along its axis, and the second chute surface 142 refers to the arcuate surface formed by the second chute surface 142 extending along its axis. If the radius of the first chute surface 141 is greater than the radius of the second chute surface 142, then the second chute surface 142 is located between the arcuate surface on which the first chute surface 141 is located and the axis.

[0120] It can be understood that if the first surface 211 is the upper surface of the first swing arm 20 and the second surface 212 is the lower surface of the first swing arm 20, that is, the first surface 211 is farther away from the bottom surface of the first bracket 10 relative to the second surface 212, then the radius of the first slide groove surface 141 is smaller than the radius of the second slide groove surface 142.

[0121] In other embodiments, the radii of the first slide groove surface 141 and the second slide groove surface 142 can also be configured to be equal, and the shape of the first swing arm 20 needs to be configured accordingly to ensure that the first surface 211 and the second surface 212 contact the first slide groove surface 141 and the second slide groove surface 142 respectively.

[0122] In addition, in this embodiment, the first surface 211 and the second surface 212 are two opposite surfaces arranged on the first swing arm 20. In other embodiments, the first surface 211 and the second surface 212 can also be arranged at a certain angle, as long as they can rotate with the first slide groove surface and the second slide groove surface respectively.

[0123] Please refer to Figures 11 and 12. In some embodiments, the first swing arm 20 has a first end 21. The two opposite surfaces of the first end 21 respectively include a first matching portion 2111 and a second matching portion 2121. The first matching portion 2111 and the second matching portion 2121 are both arc-shaped surfaces. Please refer to Figures 11 to 16 at the same time. The first matching portion 2111 is in contact with and slidably fits with the first slide groove surface 141, and the second matching portion 2121 is in contact with and slidably fits with the second slide groove surface 142.

[0124] Specifically, the first swing arm 20 has a first end 21 and a second end 22 disposed opposite each other. The first end 21 is configured to be pivotally connected to the first bracket 10, while the second end 22 is configured to be connected to the connecting plate 80 of the fixed housing. The first end 21 is pivotally disposed between the first and second chute surfaces 141, 142, allowing the second end 22 to be unfolded or folded relative to the first bracket 10. Because the first end 21 is pivotally connected to the bracket 10, the first swing arm 20 does not need to be oversized. It is understood that in other embodiments, the middle portion of the first swing arm 20 may be pivotally connected to the bracket 10, with this middle portion located between the first and second ends 21, 22.

[0125] The first mating portion 2111 is a portion of one surface of the first end 21. The area of ​​the first mating portion 2111 is smaller than the area of ​​the surface on which it is located. The second mating portion 2121 is a portion of another surface of the first end 21. The area of ​​the second mating portion 2121 is also smaller than the area of ​​the surface on which it is located. It can be understood that the first mating portion 2111 and the second mating portion 2121 are spaced apart along the centerline direction L3 of the first bracket 10.

[0126] The first mating portion 2111 matches the curvature of the first chute surface 141, thereby fitting closely and slidingly engaging with the first chute surface 141. During the folding process, the first mating portion 2111 gradually slides toward the outside of the first bracket 10. The first chute surface 141 can restrict the movement of the first swing arm 20 on one side. Simultaneously, the second mating portion 2121 fits closely and slidingly engages with the second chute surface 142. During the folding process, the second mating portion 2121 gradually slides toward the outside of the first bracket 10. The second chute surface 142 can restrict the movement of the first swing arm 20 on the other side, thereby allowing the first swing arm 20 to rotate about a predetermined rotation axis between the first chute surface 141 and the second chute surface 142. This folding mechanism 100 ensures smooth movement of the first swing arm 20.

[0127] By adopting the above technical solution, the first matching portion 2111 fits and slides with the first slide groove surface 141, and the second matching portion 2121 fits and slides with the second slide groove surface 142, so the movement of the first swing arm 20 is smoother.

[0128] Optionally, because the first end 21 of the first swing arm 20 has a certain thickness, the radii of the first mating portion 2111 and the second mating portion 2121 are different, and the radii of the first slide groove surface 141 and the second slide groove surface 142 are also different. For example, if the first surface 211 is the upper surface of the first swing arm 20 and the second surface 212 is the lower surface of the first swing arm 20, that is, the first surface 211 is farther away from the bottom surface of the first bracket 10 than the second surface 212, then the radius of the first mating portion 2111 is smaller than the radius of the second mating portion 2121.

[0129] In other embodiments, the second matching portion 2121 may only abut against the second slide groove surface 142 without slidingly matching with the second slide groove surface 142 . The movement accuracy of the first swing arm 20 can still be improved through the first slide groove surface 141 and the second slide groove surface 142 .

[0130] Referring to Figures 8 and 11, in some embodiments, the first end 21 is provided with at least two first matching portions 2111, and the at least two first matching portions 2111 are spaced apart along the axial direction of the first slide groove surface 141 and are respectively provided on both sides of the second matching portion 2121. The number of first slide groove surfaces 141 is multiple, and each first matching portion 2111 is respectively slidably matched with a corresponding first slide groove surface 141.

[0131] Taking Figures 11 and 12 as an example, the first end 21 is provided with two first mating portions 2111, and the two first mating portions 2111 have the same shape. Accordingly, as shown in Figures 7 to 9, the first bracket 10 is provided with two first sliding groove surfaces 141 corresponding to the first swing arm 20. Furthermore, the number of second mating portions 2121 can be one or more, and one or more second mating portions 2121 can be provided between two first mating portions 2111.

[0132] By respectively providing first matching portions 2111 on two opposite sides of the first end 21 , each first matching portion 2111 is in contact with and slidably engages with a first sliding groove surface 141 , so that the forces on both sides of the first swing arm 20 are balanced, and the stability during movement is better.

[0133] As shown in FIG9 and FIG14 , optionally, a limiting surface 146 is provided on the edge of the first bracket 10 , and the first slide groove surface 141 is opposite to the limiting surface 146 and spaced apart to jointly enclose an accommodating space, and the first matching portion 2111 is rotatably accommodated in the accommodating space.

[0134] The limiting surface 146 is provided on the edge of the first bracket 10, and the limiting surface 146 and the first chute surface 141 are respectively provided on opposite sides of the first swing arm 20. By providing the limiting surface 146, the limiting effect on the motion trajectory of the first swing arm 20 can be further enhanced, and the motion accuracy of the first swing arm 20 can be maintained.

[0135] It can be understood that since the limiting surface 146 and the second slide groove surface 142 are located on the same side of the first swing arm 20, the second slide groove surface 142 has the functions of sliding guidance and limiting, so the limiting surface 146 can also be omitted.

[0136] In some embodiments, the first bracket 10 is an integrally formed structure.

[0137] The first bracket 10 can be made of plastic material and is suitable for being manufactured in an integral molding manner, but is not limited thereto. For example, the first bracket 10 can also be made of metal or other materials; the first slide groove surface 141 and the second slide groove surface 142 are directly manufactured on the first bracket 10 in an integral molding manner. Therefore, the manufacturing method of the first slide groove surface 141 and the second slide groove surface 142 is simple, reducing the tolerance caused by the assembly of parts; the integrated setting of the first bracket 10 can reduce the number of parts, reduce the assembly complexity and assembly cost.

[0138] 9 and 10 , in some embodiments, a molding process slot hole 15 is defined on the first bracket 10 , and the molding process slot hole 15 is disposed opposite to the first slide groove surface 141 or the second slide groove surface 142 .

[0139] The forming process slot 15 can be a groove or a through hole, and is specifically set according to the shape of the first bracket 10 and the position of the chute surface. The forming process slot 15 is used to expose the first chute surface 141 or the second chute surface 142 to facilitate processing.

[0140] The forming process slot 15 is disposed opposite the first chute surface 141 or the second chute surface 142. That is, when the chute surface to be processed is located at the top of the first bracket 10, the forming process slot 15 is located at the bottom of the first bracket 10; when the chute surface to be processed is located at the bottom of the first bracket 10, the forming process slot 15 is located at the top of the first bracket 10. For example, in this embodiment, the forming process slot 15 is disposed opposite the first chute surface 141, the first chute surface 141 is disposed at the top of the first bracket 10, and the forming process slot 15 passes through the bottom of the first bracket 10.

[0141] The provision of the molding process slot hole 15 facilitates the integral formation of the first slide groove surface 141 and the second slide groove surface 142 on the first bracket 10 , thereby increasing the molding precision of the slide groove surfaces.

[0142] Please continue to refer to Figures 9 and 10. In some embodiments, the first bracket 10 includes a first bracket body 11 and a first boss 12 provided on the first bracket body 11, and the first slide groove surface 141 is provided on one side of the first boss 12; the first bracket body 11 is provided with a molding process slot hole 15 arranged opposite to the first slide groove surface 141.

[0143] Optionally, the first chute surface 141 is provided on the side of the first boss 12 facing the first bracket body 11, and the first chute surface 141 is spaced apart from the surface of the first bracket body 11. A certain gap exists between the first chute surface 141 and the surface of the first bracket body 11, so that the first swing arm 20 can be inserted between the first bracket body 11 and the first chute surface 141. Specifically, the first boss 12 includes a raised portion 121 connected to the first bracket body 11 and an extension portion 122 extending from the raised portion 121 along the centerline direction of the first bracket 10. The extension portion 122 is spaced apart from the first bracket body 11, that is, the extension portion 122 is suspended above the first bracket body 11, and the first chute surface 141 is provided on the side of the extension portion 122 facing the first bracket body 11. By providing the first boss 12, it is convenient to configure the first chute surface 141 to have a certain height.

[0144] In order to form the first chute surface 141 through an integral molding process, a molding process slot 15 is required to be provided on the first bracket body 11. If the first chute surface 141 is provided on the side of the first boss 12 facing the first bracket body 11, the molding process slot 15 is a through hole. It is understood that in other embodiments, the first chute surface 141 can also be provided on the side of the first boss 12 facing away from the first bracket body 11, in which case the molding process slot 15 is not required for the first chute surface 141.

[0145] By providing the molding process slot hole 15 on the first bracket body 11 , the first slide groove surface 141 can be conveniently manufactured integrally on the first bracket 10 .

[0146] In some embodiments, the first bracket 10 further includes a second boss 13 protruding from one side of the first bracket body 11 , and the second sliding groove surface 142 is provided on one side of the second boss 13 .

[0147] As shown in Figures 9 to 16, the first chute surface 141 is used to fit the upper surface of the first swing arm 20, and the second chute surface 142 is used to fit the lower surface of the first swing arm 20. Optionally, two second chute surfaces 142 are provided on the second boss 13 to increase the contact area between the first bracket 10 and the first swing arm 20.

[0148] The second boss 13 is integrally formed with the first bracket body 11 ; optionally, the second slide groove surface 142 is directly provided on the surface of the second boss 13 facing away from the first bracket body 11 , and the second slide groove surface 142 can be directly processed without providing a corresponding molding process slot hole 15 .

[0149] As shown in Figures 8 and 9, the first and second chute surfaces 141, 142 are both arc-shaped and have the same convex direction. The first chute surface 141 is a convex surface protruding from the first boss 12, while the second chute surface 142 is a concave surface recessed from the second boss 13. It is understood that the structures of the first and second bosses 12, 13 are not limited to this. Either the first and second chute surfaces 141, 142 can be convex or concave, as long as they can slideably engage with both surfaces of the first swing arm 20, respectively. As shown in Figures 11 and 12, the first mating portion 2111 is a concave surface, while the second mating portion 2121 is a convex surface. The first and second mating portions 2111, 2121 have the same convex direction.

[0150] Optionally, as shown in Figures 9 and 11 , the first swing arm 20 has two protrusions on both sides extending along the centerline of the first bracket 10 , and the first mating portion 2111 is provided on the surface of the protrusions. The protrusions are rotatably provided between the first slide groove surface 141 and the limiting surface 146 .

[0151] Please refer to Figures 7 and 8. In some embodiments, the first bracket 10 includes a first side portion 10a and a second side portion 10b, and the first side portion 10a and the second side portion 10b are respectively located on both sides of the center line of the first bracket 10; the first side portion 10a is provided with a first slide groove surface 141 and a second slide groove surface 142 having a first axis L1, and the second side portion 10b is provided with a first slide groove surface 141 and a second slide groove surface 142 having a second axis L2, and the center line L3 of the first bracket 10 is parallel to the first axis L1 and the second axis L2; ​​the folding mechanism 100 includes at least two first swing arms 20, and the at least two first swing arms 20 are respectively rotatably connected to the first side portion 10a and the second side portion 10b.

[0152] The number of first swing arms 20 can be two or more, depending on the specific needs. As shown in Figures 7 and 8, the first swing arms 20 on both sides of the first bracket 10 are symmetrically arranged relative to the centerline L3 of the first bracket 10. Accordingly, the first chute surfaces 141 and the second chute surfaces 142 on both sides of the first bracket 10 are also symmetrically arranged. In other embodiments, the first swing arms 20 on both sides of the first bracket 10 can also be asymmetrically arranged.

[0153] By providing first swing arms 20 on either side of the first bracket 10, the first swing arms 20 on both sides of the folding mechanism 100 can fold or unfold relative to the first bracket 10, thereby driving the components connected to the first swing arms 20 to fold or unfold. When the folding mechanism 100 is used in a foldable mobile terminal, the two first swing arms 20 are used to connect the two housings via the connecting plate 80 to achieve relative folding and unfolding of the two housings.

[0154] 3 , 4 and 7 , in some embodiments, the folding mechanism 100 further includes a second swing arm 30 rotatably connected to the first bracket 10 , and the first swing arm 20 and the second swing arm 30 are spaced apart along the centerline direction of the first bracket 10 .

[0155] It can be understood that the number of the second swing arms 30 can also be at least two, and the at least two second swing arms 30 are rotatably connected to the first side portion 10a and the second side portion 10b of the first bracket 10 respectively.

[0156] The first swing arm 20 and the second swing arm 30 are rotatably connected to the first bracket 10 respectively, and the first swing arm 20 and the second swing arm 30 can be connected together to a connecting plate 80 to adapt to the length of the housing.

[0157] Optionally, the folding mechanism 100 further includes a damping structure 313 , which is mounted on the first bracket 10 and connected to the second swing arm 30 . The damping structure 313 is configured to provide a damping force during the rotation of the second swing arm 30 .

[0158] 7 and 8 , in some embodiments, the second swing arm 30 is rotatably connected to the first bracket 10 via a rotating shaft and a rotating shaft hole 143 ; wherein the rotating shaft hole 143 is provided on the first bracket 10 ; or, the rotating shaft (not shown) is integrally formed on the first bracket 10 .

[0159] The second swing arm 30 is rotatably connected to the first bracket 10 via a rotating shaft and a rotating shaft hole 143. That is, one of the second swing arm 30 and the first bracket 10 is provided with a rotating shaft, and the other is provided with a rotating shaft hole 143, and the rotating shaft is rotatably inserted into the rotating shaft hole 143. The second swing arm 30 is capable of moving about a predetermined rotation axis. The rotation axis of the second swing arm 30 is the centerline of the rotating shaft hole 143, and the rotation axis is parallel to the axis of the first slide groove surface 141 and the centerline of the first bracket 10. At the same time, the embodiment of the present application integrates the rotational connection structure of the first swing arm 20 and the second swing arm 30 into the first bracket 10, reducing the number of parts, the complexity of the assembly process, and the assembly cost.

[0160] In one embodiment, as shown in FIG. 7 and FIG. 8 , the shaft hole 143 is formed on the first bracket 10 , and the inner surface of the shaft hole 143 is an integrally formed cylindrical surface. In this case, a shaft is provided on the second swing arm 30 .

[0161] The inner surface of the shaft hole 143 is a complete cylindrical surface, and the hole diameter and hole center distance are of high precision. The gap between the shaft and the shaft hole 143 can be reduced, thereby improving the synchronization performance of the second swing arm 30. The shaft hole 143 does not need to be divided into two parts that are matched with each other and are respectively made on two components. Therefore, the second swing arm 30 can rotate around a determined rotation axis with high motion accuracy.

[0162] Specifically, the first pivot hole 143 can be provided at the end of the first bracket 10, and the end of the second swing arm 30 away from the first bracket 10 can be rotatably engaged with the pivot hole 143 on the other bracket; or, two spaced first pivot holes 143 are provided on the first bracket 10, and the two ends of the second swing arm 30 are respectively rotatably engaged with the two pivot holes 143, and the coaxiality between the multiple pivot holes 143 is better.

[0163] In another embodiment, the rotating shaft is integrally formed on the first bracket 10. In this case, the second swing arm 30 is provided with a rotating shaft hole 143, which can also realize the rotational connection between the second swing arm 30 and the first bracket 10 and improve the movement accuracy of the second swing arm 30.

[0164] By adopting the above technical solution, the second swing arm 30 is rotatably connected to the first bracket 10 through the rotating shaft and the rotating shaft hole 143. The installation method of the second swing arm 30 is simple, and the second swing arm 30 can move around a determined rotation axis with high movement accuracy.

[0165] 17 and 18 , in some embodiments, a first stopping structure is provided on the first bracket 10 , and the first stopping structure is used to stop the first swing arm 20 during the unfolding or folding process of the first swing arm 20 .

[0166] By providing a first stop structure, the rotation angle of the first swing arm 20 can be limited, allowing the first swing arm 20 to fold and unfold within a certain angular range. For example, the first stop structure can stop the first swing arm 20 in its unfolded state, allowing it to lie flat on one side of the first bracket 10; alternatively, the first stop structure can stop the first swing arm 20 in its folded state, allowing it to be positioned perpendicular to the first bracket 10. It will be appreciated that the rotation angle range of the first swing arm 20 is not limited to this and can be set as needed.

[0167] In some embodiments, please refer to Figures 8, 11, and 17. A first mounting hole 23 is provided on the first swing arm 20; the first stop structure includes a first stop block 51 provided on the first bracket 10, and the first stop block 51 is passed through the first mounting hole 23. The first stop block 51 is used to support the first swing arm 20 when the first swing arm 20 is in an unfolded state or a folded state.

[0168] The first mounting hole 23 may be disposed in the middle of the first swing arm 20 to facilitate the first swing arm 20 to rotate relative to the first stop block 51 .

[0169] The first bracket 10 is provided with a stopper mounting hole. One end of the first stopper 51 is mounted within the stopper mounting hole, while the other end extends through the first mounting hole 23 of the first swing arm 20. When the first swing arm 20 is deployed, the first stopper 51 does not block the first swing arm 20. However, when the first swing arm 20 is folded to a certain extent, the first swing arm 20 at the edge of the first mounting hole 23 abuts against the first stopper 51, thereby preventing the first swing arm 20 from further folding. Optionally, the end of the first stopper 51 is provided with a stopper flange facing the center of the first bracket 10, against which the first swing arm 20 at the edge of the first mounting hole 23 abuts.

[0170] In other embodiments, the first stop block 51 can resist the first swing arm 20 during the expansion process of the first swing arm 20 .

[0171] By setting the first stop block 51, the first stop block 51 can stop the first swing arm 20 when the first swing arm 20 is in the unfolded or folded state to limit the rotation angle of the first swing arm 20; since the first stop block 51 is penetrated into the first mounting hole 23, the first stop block 51 is prevented from hindering the movement of the first swing arm 20 within the normal rotation angle range.

[0172] In some embodiments, the first stop block 51 protrudes from the first bracket 10 , and the first stop block 51 has a first stop surface 511 on the side facing the first bracket 10 , and the first stop surface 511 is used to support the first swing arm 20 during the folding process of the first swing arm 20 .

[0173] The first swing arm 20 has an upper surface and a lower surface disposed opposite each other. The upper surface is defined herein as the surface of the first swing arm 20 that is farther from the bottom surface of the first bracket 10 when in the unfolded state. The first stop surface 511 is configured to abut the upper surface of the first swing arm 20 when the first swing arm 20 is in the folded state. In other embodiments, the first stop surface 511 may also abut the lower surface of the first swing arm 20 when the first swing arm 20 is in the folded state.

[0174] Optionally, the first stop block 51 is installed through the stop block mounting hole on the first bracket 10 to facilitate assembly. In other embodiments, the first stop block 51 can also be integrally formed with the first bracket 10.

[0175] By providing the first stop block 51 protruding from the first bracket 10 , the first stop surface 511 of the first stop block 51 can abut against the first swing arm 20 in the folded state to prevent the first swing arm 20 from over-folding.

[0176] 8 and 18 , in some embodiments, the first stop structure includes a second stop surface 52 disposed on an edge of the first bracket 10 , and the second stop surface 52 is used to abut against the first swing arm 20 when the first swing arm 20 is in an expanded state.

[0177] As shown in Figure 8 , the second stop surface 52 is disposed between the first chute surface 141 and the second chute surface 142. The second stop surface 52 can be flat to facilitate contact with the first swing arm 20. The angle of the second stop surface 52 is adjustable to accommodate different deployment angles. Optionally, the second stop surface 52 is lower than both the first chute surface 141 and the second chute surface 142.

[0178] By adopting the above technical solution, the second stop surface 52 provided on the first bracket 10 is directly used to stop the first swing arm 20 from being over-extended, and the stop structure is relatively simple.

[0179] Please refer to Figures 8, 19 and 20. In some embodiments, the first bracket 10 is further provided with a second stop structure 60. The second stop structure 60 includes a third stop surface 61 and a fourth stop surface 62 provided on the first bracket 10. The third stop surface 61 is used to support the second swing arm 30 when the second swing arm 30 is in an unfolded state, and the fourth stop surface 62 is used to support the second swing arm 30 when the second swing arm 30 is in a folded state.

[0180] Specifically, the first bracket 10 is provided with a rotation axis hole 143. A third stop surface 61 and a fourth stop surface 62 are both provided on one side of the rotation axis hole 143. The third stop surface 61 is located at an edge of the first bracket 10, and the fourth stop surface 62 is located between the third stop surface 61 and the centerline of the first bracket 10. Optionally, the third stop surface 61 can be arranged vertically or offset at a certain angle relative to the vertical direction. When the second swing arm 30 is extended, the second swing arm 30 will abut against the third stop surface 61, thereby preventing the second swing arm 30 from over-extending. Optionally, the fourth stop surface 62 can be arranged horizontally or offset at a certain angle relative to the horizontal direction. When the second swing arm 30 is folded, the second swing arm 30 will abut against the fourth stop surface 62, thereby preventing the second swing arm 30 from over-folding.

[0181] By adopting the above technical solution, the second swing arm 30 is directly stopped by the third stop surface 61 and the fourth stop surface 62 provided on the first bracket 10, so that the rotation angle range of the second swing arm 30 can be limited, and the stop structure is relatively simple.

[0182] Please refer to Figure 7. In some embodiments, the folding mechanism 100 also includes a second bracket 70 fixedly connected to the first bracket 10, and the connection method between the first bracket 10 and the second bracket 70 includes one or more of bonding, welding, snap connection, interference fit connection and fastener connection; wherein, the second bracket 70 is used to support the first bracket 10, or the second bracket 70 is used to connect a connecting plate 80 together with the first bracket 10.

[0183] The present application does not limit the shape and material of the second bracket 70 , and the second bracket 70 may be a shaft cover, a support, or other structures.

[0184] In this embodiment, the second bracket 70 is an axle cover. The second bracket 70 is arranged on the side of the first bracket 10 away from the first swing arm 20. The second bracket 70 is used to support the first bracket 10, but is not limited to this. In other embodiments, the second bracket 70 can also be fixedly connected to one side of the first bracket 10 along the length direction of the first bracket 10, so that the first bracket 10 and the second bracket 70 can jointly support the connecting plate 80 along the length direction of the connecting plate 80.

[0185] The rotating connection structures of the first swing arm 20 and the second swing arm 30 are both provided on the first bracket 10. There is no need to provide a rotating connection structure compatible with the first swing arm 20 or the second swing arm 30 on the second bracket 70. Therefore, the difficulty of assembling the second bracket 70 and the first bracket 10 is reduced. The first bracket 10 and the second bracket 70 can be fixedly connected by one or more connection methods. For example, the first bracket 10 and the second bracket 70 are only connected by bonding. For another example, the first bracket 10 and the second bracket 70 are connected by both snap connection and fastener connection, etc.

[0186] By adopting the above-mentioned technical solution, the folding mechanism 100 provided in this application arranges the rotating connection structure of the first swing arm 20 and the second swing arm 30 on the first bracket 10, the coaxiality is controllable, and the assembly difficulty of the second bracket 70 and the first bracket 10 is reduced, which facilitates assembly and reduces costs.

[0187] Please refer to Figures 7, 8, 20 to 22. In some embodiments, one of the first bracket 10 and the second bracket 70 is provided with a positioning pin 71, and the other is provided with a positioning hole 72. The positioning hole 72 is a through hole or a blind hole; the positioning pin 71 is inserted into the positioning hole 72.

[0188] For example, as shown in FIG21 , a positioning hole 72 is provided on the first bracket 10 , and a positioning pin 71 is protruding from the second bracket 70 ; of course, a positioning pin 71 may be provided on the first bracket 10 and a positioning hole 72 may be provided on the second bracket 70 .

[0189] In addition, the number of the positioning holes 72 and the positioning pins 71 can be one or more, for example, two positioning pins 71 are respectively provided on opposite sides of the second bracket 70. During assembly, the positioning pins 71 on the second bracket 70 are inserted into the corresponding positioning holes 72, which helps to improve the alignment accuracy of the first bracket 10 and the second bracket 70.

[0190] By adopting the above technical solution, the first bracket 10 and the second bracket 70 are aligned through the positioning pin 71 and the positioning hole 72, with high assembly alignment accuracy. The folding mechanism 100 has fewer parts, and the assembly difficulty and cost are reduced.

[0191] Please refer to Figure 7, Figure 10 and Figure 22. In some embodiments, the second bracket 70 is arranged on the side of the first bracket 10 away from the first swing arm 20. The side of the first bracket 10 facing the second bracket 70 is provided with a positioning surface 111 and a glue dispensing groove 112. The positioning surface 111 is used to support the second bracket 70. The glue dispensing groove 112 is recessed relative to the positioning surface 111. The glue dispensing groove 112 is used to accommodate the colloid.

[0192] The second bracket 70 is a shaft cover that supports the first bracket 10. It is understood that multiple first brackets 10 can be sequentially mounted on the second bracket 70. The second bracket 70 can alleviate the problem of insufficient thickness of the first bracket 10. The positioning surface 111 is used to abut the second bracket 70, thereby aligning the first bracket 10 and the second bracket 70 in the height direction. The dispensing groove 112 is used to accommodate the glue. The position and area of ​​the dispensing groove 112 can be adjusted as needed.

[0193] During assembly, the glue can be applied to the glue dispensing groove 112 first, and then the first bracket 10 is installed on the second bracket 70, so that the positioning pin 71 of the second bracket 70 is inserted into the positioning hole 72 of the first bracket 10, and the positioning surface 111 of the first bracket 10 is against the surface of the second bracket 70.

[0194] By adopting the above technical solution, the first bracket 10 can be aligned with the second bracket 70 in the height direction via the positioning surface 111, and the first bracket 10 can be adhered to the second bracket 70 via adhesive to achieve a fixed connection between the first bracket 10 and the second bracket 70. In this embodiment of the application, the rotational engagement structure of the first swing arm 20 is integrated into the first bracket 10, eliminating the need for a rotational engagement structure on the second bracket 70. This reduces the number of screws required for precise positioning of the first bracket 10 and the second bracket 70, thereby reducing assembly difficulty and cost.

[0195] In some embodiments, a screw column 73 is provided on the second bracket 70, and a through hole 16 is provided on the first bracket 10. The screw column 73 is passed through the through hole 16 and is used to install a nut 74. The number of the screw column 73 and the through hole 16 can be one or more, and optionally, the number of the screw column 73 and the through hole 16 can be two.

[0196] It can be understood that when the first bracket 10 and the second bracket 70 are fixedly connected by the screw column 73 and the nut 74, other connection methods can be used simultaneously. For example, in addition to setting the nut 74, the first bracket 10 and the second bracket 70 are also bonded by colloid.

[0197] By adopting the above technical solution, the folding mechanism 100 uses the nut 74 as a fastener to fix the first bracket 10 and the second bracket 70, and the connection strength is good. The first bracket 10 and the second bracket 70 do not need to use too many parts for assembly, the assembly difficulty is small, and the cost is low.

[0198] 9 and 23 , in some embodiments, a support platform 113 is provided on the surface of the first bracket 10 . The support platform 113 is used to support the connecting plate 80 connected to the first swing arm 20 when the first swing arm 20 is in the expanded state.

[0199] Specifically, referring to Figures 7 and 11 , the first end 21 of the first swing arm 20 is rotatably connected to the first bracket 10 , and the second end 22 of the first swing arm 20 is connected to the connecting plate 80 . The connection between the second end 22 and the connecting plate 80 can be a rotating connection, a sliding connection, a fixed connection, etc. The connecting plate 80 is used to connect to the housing of the foldable mobile terminal.

[0200] Optionally, the first side portion 10 a and the second side portion 10 b of the first bracket 10 are both provided with a plurality of support platforms 113 , and the plurality of support platforms 113 are respectively provided on opposite sides of the first swing arm 20 to stably support the connecting plate 80 .

[0201] By adopting the above technical solution, the first bracket 10 provided in the embodiment of the present application can support the connecting plate 80 in a flattened state through the supporting platform 113, so as to reduce the pressing virtual position of the screen in the axis area in the flattened state.

[0202] In some embodiments, the second bracket 70 is a shaft cover, and a screen water drop avoidance groove 17 is provided on the surface of the first bracket 10 facing away from the second bracket 70 , and the screen water drop avoidance groove 17 is used to adapt to the folded screen 200 .

[0203] Referring to Figures 2 and 24 , the folding mechanism 100 provided in this embodiment of the present application is an inward-folding solution. When the folding mechanism 100 is used in a foldable mobile terminal, in the folded state, the screen 200 is located between the two first swing arms 20. Because the outer contour of the folded screen 200 can be teardrop-shaped, the screen teardrop avoidance groove 17 provided on the first bracket 10 can adapt to the shape of the folded screen 200 to avoid the inward-folding screen 200.

[0204] Specifically, the screen water drop avoidance groove 17 refers to a groove-like structure formed integrally on the surface of the first bracket 10. The first bracket 10 has grooves at both ends, forming part of the screen water drop avoidance groove 17. The surface of the middle portion of the first bracket 10 also has a roughly water drop-shaped groove. It is understood that if the middle portion of the first bracket 10 can avoid the screen, only the grooves at the ends of the first bracket 10 can be used as the screen water drop avoidance groove 17.

[0205] By adopting the above technical solution, a screen water drop avoidance groove 17 is designed on the first bracket 10, which increases the avoidance gap between the first bracket 10 and the water drop outer contour surface of the folded screen.

[0206] Referring to Figures 8 and 10 , at least one side of the first bracket 10 is provided with a weight-reducing groove 18. This groove 18 serves to reduce the weight of the first bracket 10, thereby meeting the lightweight requirements of foldable mobile terminals. The groove 18 can be provided on one or both sides of the first bracket 10. Optionally, the groove 18 can be provided on both the surface of the first bracket 10 proximal to the second bracket 70 and the surface facing away from the second bracket 70.

[0207] Referring to Figures 25 to 27 , a second embodiment of the present application provides a folding mechanism 100. Similar to the first embodiment, the folding mechanism 100 includes a first bracket 10 and a first swing arm 20, wherein the first swing arm 20 is rotatably connected to one side of the first bracket 10. The folding mechanism 100 provided in this embodiment is an outward folding solution. When the folding mechanism 100 is used in a foldable mobile terminal, the screen will fold outside the folding mechanism 100. It will be understood that the folding mechanism 100 provided in this embodiment can also be an inward folding solution. When the folding mechanism 100 is used in a foldable mobile terminal, the screen will fold inside the folding mechanism 100.

[0208] Referring to Figures 28 to 31B , a first chute surface 141 and a second chute surface 142 are provided on one side of the first bracket 10. Both the first chute surface 141 and the second chute surface 142 are arcuate and coaxially arranged, with the first chute surface 141 and the second chute surface 142 spaced apart along the centerline of the first bracket 10. Referring to Figures 27 , 32 , and 33 , the first swing arm 20 has a first end 21, with opposing surfaces of the first end 21 respectively contacting and rotating with the first chute surface 141 and the second chute surface 142. This allows the first swing arm 20 to rotate about a defined axis of rotation, resulting in a simple structure for the folding mechanism 100 and improved motion accuracy for the first swing arm 20.

[0209] As shown in Figures 31A and 32, the first surface 211 of the first end 21 includes a first matching portion 2111, and the second surface 212 includes a second matching portion 2121. The first matching portion 2111 and the second matching portion 2121 are both arc-shaped surfaces. Please refer to Figures 36 and 37. The first matching portion 2111 fits and slides with the first slide groove surface 141; please refer to Figures 38 and 39. The second matching portion 2121 fits and slides with the second slide groove surface 142.

[0210] As shown in Figures 27, 32 and 33, the first end 21 is provided with at least two first matching portions 2111, and the at least two first matching portions 2111 are arranged at intervals along the center line direction of the first bracket 10 and are respectively arranged on both sides of the second matching portion 2121, and each first matching portion 2111 is respectively slidably matched with a corresponding first slide groove surface 141.

[0211] At least one of the first chute surface 141 and the second chute surface 142 is integrally formed on the bracket; a molding process slot hole 15 is provided on the first bracket 10, and the molding process slot hole 15 is arranged opposite to the first chute surface 141 or the second chute surface 142.

[0212] Optionally, as shown in Figures 28 and 31A, the first bracket 10 includes a first bracket body 11 and a first boss 12 provided on the first bracket body 11. A first chute surface 141 is provided on a surface of the first boss 12, and the molding process slot 15 is disposed opposite the first chute surface 141. In this embodiment, the molding process slot 15 is disposed opposite an end of the first chute surface 141 near the middle of the first bracket body 11.

[0213] Optionally, a groove is provided on the first bracket 10 , and the first sliding groove surface 141 is provided in the groove.

[0214] Referring again to Figure 27 , the first bracket 10 includes a first side portion 10a and a second side portion 10b, with the first side portion 10a and the second side portion 10b located on opposite sides of the centerline of the first bracket 10. The folding mechanism 100 includes at least two first swing arms 20, each pivotally connected to the first side portion 10a and the second side portion 10b. In this embodiment, the two first swing arms 20 are staggered relative to the centerline of the first bracket 10. It is understood that the two first swing arms 20 may alternatively be symmetrically disposed relative to the centerline of the first bracket 10.

[0215] In one embodiment, the folding mechanism 100 further includes a second swing arm 30 rotatably connected to the first bracket 10 , and the first swing arm 20 and the second swing arm 30 are spaced apart along a centerline direction of the first bracket 10 .

[0216] Please refer to Figures 27, 28 and 30. The first bracket 10 is also provided with a third slide groove surface 144 and a fourth slide groove surface 145. The third slide groove surface 144 and the fourth slide groove surface 145 are coaxially arranged and are both arc-shaped surfaces; the opposite surfaces of the second swing arm 30 are rotatably connected to the third slide groove surface 144 and the fourth slide groove surface 145 respectively.

[0217] The second swing arm 30 is connected to the first bracket 10 via a virtual axis. The axis between the first and second chute surfaces 141, 142 serves as the rotation axis of the second swing arm 30. The folding mechanism 100 enables the second swing arm 30 to rotate about a fixed axis, thereby improving the motion accuracy of the second swing arm 30. Furthermore, the folding mechanism 100 simultaneously incorporates the third and fourth chute surfaces 144, 145 on the first bracket 10, facilitating fabrication and improving the coaxiality between the chute surfaces, thereby preventing the impact of cumulative component tolerances on the swing arm's motion accuracy.

[0218] 30 to 31B , to facilitate processing, the first bracket 10 is further provided with a molding process slot 15 corresponding to the first chute surface 141 or the second chute surface 142, and a molding process slot 15 corresponding to the third chute surface 144 or the fourth chute surface 145. For example, in this embodiment, the molding process slot 15 is disposed opposite the third chute surface 144.

[0219] The third and fourth chute surfaces 144, 145 are spaced apart along the axis of the third chute surface 144. Referring to Figures 34 and 35, the second swing arm 30 is provided with a third mating portion 311 and a fourth mating portion 312 on opposing surfaces, respectively. Referring to Figures 40 and 41, the third mating portion 311 slidably engages with the third chute surface 144. Referring to Figures 42 and 43, the fourth mating portion 312 slidably engages with the fourth chute surface 145. This ensures smooth movement of the third swing arm 41.

[0220] A first stopping structure is provided on the first bracket 10 , and the first stopping structure is used to stop the first swing arm 20 when the first swing arm 20 is in an unfolded or folded state.

[0221] 28 and 44 , the first stopping structure includes a first stopping block 51 disposed on the first bracket 10 . The first stopping block 51 has a first stopping surface 511 . The first stopping surface 511 is used to resist the first swing arm 20 when the first swing arm 20 is in the expanded state.

[0222] The first bracket 10 has an inner surface and an outer surface that are relatively arranged. The first swing arm 20 is folded in a direction away from the outer surface. A second mounting hole 115 is provided on the first bracket 10. The first stop block 51 is accommodated in the second mounting hole 115. The first stop block 51 has a first stop surface 511 that faces away from the inner surface. The first stop surface 511 is used to support the first swing arm 20 when the first swing arm 20 is in an unfolded state.

[0223] The first stop surface 511 can be an inclined surface inclined relative to the inner surface of the first bracket 10. The angle of the first stop surface 511 can be set according to the desired deployment angle. It will be appreciated that when the first swing arm 20 is folded, it will gradually move away from the first stop surface 511, so that the first stop surface 511 will not hinder the folding of the first swing arm 20. The second mounting hole 115 provided in the first bracket 10 facilitates the installation of the first stop block 51 on the first bracket 10. Furthermore, the first stop block 51 is used to support the first swing arm 20 when it is deployed, without hindering its folding.

[0224] Referring to Figure 28 , in some embodiments, the first bracket 10 is provided with a second stop structure 60 , which includes a third stop surface 61 and a fourth stop surface 62 disposed on the first bracket 10 . Referring to both Figures 28 and 45 , the third stop surface 61 is configured to abut the second swing arm 30 when the second swing arm 30 is deployed. Referring to both Figures 28 and 46 , the fourth stop surface 62 is configured to abut the second swing arm 30 when the second swing arm 30 is folded. The third stop surface 61 may be disposed at an edge of the first bracket 10 , and the fourth stop surface 62 may be disposed between the third stop surface 61 and the centerline of the first bracket 10 .

[0225] Optionally, a second stop block 63 is provided on the second swing arm 30, configured to abut against the fourth stop surface 62 when the second swing arm 30 is folded. In this embodiment, the second stop block 63 is fixedly connected to the second swing arm 30, and a groove is provided on the first bracket 10 for the second stop block 63 to rotate. Referring to Figures 25 and 27 , in some embodiments, the folding mechanism 100 further includes a third swing arm 41 rotatably connected to the first bracket 10. The first swing arm 20, the second swing arm 30, and the third swing arm 41 are spaced apart along the centerline of the first bracket 10.

[0226] The third swing arm 41 can be rotatably connected to the first bracket 10 via a rotating shaft or a virtual shaft. For example, in this embodiment, the third swing arm 41 is rotatably connected to the first bracket 10 via a rotating shaft. Specifically, referring to Figures 25, 27, and 30, the first bracket 10 is provided with a rotating shaft hole 143, and the third swing arm 41 is rotatably connected to the first bracket 10 via a rotating shaft inserted into the rotating shaft hole 143. It will be understood that if the third swing arm 41 is rotatably connected to the first bracket 10 via a virtual shaft, the first bracket 10 is provided with a sliding groove surface adapted to the third swing arm 41. The specific structure can be referred to the first swing arm 20 and will not be described in detail here.

[0227] Please continue to refer to Figure 25. In some embodiments, the folding mechanism 100 also includes a second bracket 70 fixedly connected to the first bracket 10, and the connection method between the first bracket 10 and the second bracket 70 includes one or more of bonding, welding, snap connection, interference fit connection and fastener connection.

[0228] Optionally, the folding mechanism 100 includes a plurality of first brackets 10 and second brackets 70 connected between adjacent first brackets 10. The number of first brackets 10 can be two or more. The length of the first bracket 10 does not need to be too long, which is convenient for manufacturing.

[0229] Optionally, the second bracket 70 is fixedly connected to one side of the first bracket 10 along the length direction of the first bracket 10, and the fourth swing arm 42 is rotatably connected to the second bracket 70. The structure of the fourth swing arm 42 can be the same as any one of the first swing arm 20, the second swing arm 30, and the third swing arm 41, or can be a swing arm of other structures, which is not limited in this application.

[0230] By providing the fourth swing arm 42 , the fourth swing arm 42 can drive the housing to rotate together with the swing arm on the first bracket 10 .

[0231] Please refer to Figures 47 and 48. In some embodiments, one of the first bracket 10 and the second bracket 70 is provided with a positioning pin 71, and the other is provided with a positioning hole 72. The positioning hole 72 is a through hole or a blind hole; the positioning pin 71 is inserted into the positioning hole 72.

[0232] Optionally, the positioning pin 71 is welded in the positioning hole 72, and the positioning hole 72 is also used to accommodate welding slag. In this way, the stability of the connection between the first bracket 10 and the second bracket 70 can be improved.

[0233] In some embodiments, the second bracket 70 and the first bracket 10 are further fixedly connected by fastening screws 75 .

[0234] The folding mechanism 100 provided in this embodiment is an outward-folding solution. When the folding mechanism 100 is used in a foldable mobile terminal, the screen will fold outside the folding mechanism 100. Referring to Figures 30 and 37 to 46, in some embodiments, the outer surface 101 of the first bracket 10 is a curved surface designed to conform to the screen in the folded state. The outer surface 101 of the first bracket 10 refers to the surface of the first bracket 10 facing away from the first swing arm 20 when in the folded state.

[0235] It can be understood that when the folding mechanism 100 further includes a second bracket 70 , the outer surface of the second bracket 70 is also a curved surface, and the curved surface is used to adapt to the screen in the folded state.

[0236] Please refer to Figures 1 and 2 again. The embodiment of the second aspect of the present application proposes a foldable mobile terminal 1000, including a first shell 300, a second shell 400 and a screen 200, the screen 200 is covered on the first shell 300 and the second shell 400, and the foldable mobile terminal 1000 also includes the folding mechanism 100 provided in any embodiment of the first aspect, and the first shell 300 and the second shell 400 are opened or closed by the folding mechanism 100.

[0237] The above is only a specific implementation method of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed in this application, which should be covered by the protection scope of the present application.

Claims

1. A folding mechanism, characterized in that: The folding mechanism comprises: A first bracket, wherein a first slide groove surface and a second slide groove surface are integrally provided on the first bracket, the first slide groove surface and the second slide groove surface are both arc-shaped surfaces and are coaxially arranged, and the first slide groove surface and the second slide groove surface are spaced apart along the axial direction of the first slide groove surface; The first swing arm, two surfaces of the first swing arm are respectively in contact with the first slide groove surface and the second slide groove surface and are rotationally matched.

2. The folding mechanism according to claim 1, characterized in that: The radii of the first chute surface and the second chute surface are different.

3. The folding mechanism according to claim 1, characterized in that: The first swing arm has a first end, and the two opposite surfaces of the first end respectively include a first matching portion and a second matching portion, the first matching portion and the second matching portion are both arc-shaped surfaces, the first matching portion is in contact with and slidably fits with the first slide groove surface, and the second matching portion is in contact with and slidably fits with the second slide groove surface.

4. The folding mechanism according to claim 3, characterized in that: The first end is provided with at least two first matching parts, and the at least two first matching parts are arranged at intervals along the axial direction of the first slide groove surface and are respectively arranged on both sides of the second matching part; the number of the first slide groove surfaces is multiple, and each first matching part is slidably matched with a corresponding first slide groove surface.

5. The folding mechanism according to claim 4, characterized in that: The first bracket is also provided with a limiting surface, the first slide groove surface is opposite to the limiting surface and is spaced apart from each other to jointly enclose a receiving space, and the first matching portion is rotatably received in the receiving space.

6. The folding mechanism according to claim 1, characterized in that: The first bracket is provided with a forming process slot hole, and the forming process slot hole is arranged opposite to the first slide groove surface or the second slide groove surface.

7. The folding mechanism according to claim 6, characterized in that: The first bracket includes a first bracket body and a first boss disposed on the first bracket body, and the first slide groove surface is disposed on one side of the first boss; The first bracket body is provided with the molding process slot hole arranged opposite to the first slide groove surface.

8. The folding mechanism according to claim 7, characterized in that: The first bracket further includes a second boss disposed on one side of the first bracket body, and the second slide groove surface is disposed on one side of the second boss.

9. The folding mechanism according to any one of claims 1 to 8, characterized in that: The first bracket includes a first side portion and a second side portion, the first side portion and the second side portion are respectively located on both sides of a center line of the first bracket, the first side portion is provided with the first slide groove surface and the second slide groove surface having a first axis, and the second side portion is provided with the first slide groove surface and the second slide groove surface having a second axis, and the center line of the first bracket is parallel to the first axis and the second axis; The folding mechanism includes at least two first swing arms, and the at least two first swing arms are rotatably connected to the first side portion and the second side portion respectively.

10. The folding mechanism according to any one of claims 1 to 8, characterized in that: The first bracket is provided with a first stopping structure, and the first stopping structure is used to stop the first swing arm when the first swing arm is in an unfolded state or a folded state.

11. The folding mechanism according to claim 10, characterized in that: A first mounting hole is provided on the first swing arm; the first stopping structure includes a first stop block provided on the first bracket, the first stop block is passed through the first mounting hole, and the first stop block is used to support the first swing arm when the first swing arm is in an unfolded state or a folded state.

12. The folding mechanism according to claim 10, characterized in that: The first bracket has an inner surface and an outer surface that are arranged opposite to each other, the first swing arm is folded in a direction away from the outer surface, and a second mounting hole is provided on the first bracket; The first stop structure includes a first stop block arranged on the first bracket, the first stop block is accommodated in the second mounting hole, the first stop block has a first stop surface facing away from the inner surface, and the first stop surface is used to support the first swing arm when the first swing arm is in an expanded state.

13. The folding mechanism according to claim 10, characterized in that: The first stop structure includes a second stop surface arranged on an edge of the first bracket, and the second stop surface is used to abut against the first swing arm when the first swing arm is in an expanded state.

14. The folding mechanism according to any one of claims 1 to 8, characterized in that: The folding mechanism further comprises a second swing arm rotatably connected to the first bracket, and the first swing arm and the second swing arm are spaced apart along the center line direction of the first bracket.

15. The folding mechanism according to claim 14, characterized in that: The second swing arm is rotatably connected to the first bracket via a rotating shaft and a rotating shaft hole; Wherein, the shaft hole is provided on the first bracket, and the inner surface of the shaft hole is an integrally formed cylindrical surface; or, The rotating shaft is integrally formed on the first bracket.

16. The folding mechanism according to claim 14, characterized in that: The first bracket is also provided with a third slide groove surface and a fourth slide groove surface, the third slide groove surface and the fourth slide groove surface are coaxially arranged and are both arc-shaped surfaces; The two opposite surfaces of the second swing arm are respectively in contact with the third slide groove surface and the fourth slide groove surface and are rotationally matched.

17. The folding mechanism according to claim 16, characterized in that: The third chute surface and the fourth chute surface are arranged at intervals along the axial direction of the third chute surface; The second swing arm has two opposite surfaces respectively provided with a third matching portion and a fourth matching portion, the third matching portion is fitted and slidably matched with the third slide groove surface, and the fourth matching portion is fitted and slidably matched with the fourth slide groove surface.

18. The folding mechanism according to claim 14, characterized in that: The first bracket is provided with a third stop surface and a fourth stop surface, the third stop surface is used to abut the second swing arm when the second swing arm is in an unfolded state, and the fourth stop surface is used to abut the second swing arm when the second swing arm is in a folded state.

19. The folding mechanism according to claim 18, characterized in that: The second swing arm is provided with a second stop block, and the second stop block is used to abut against the fourth stop surface when the second swing arm is in a folded state.

20. The folding mechanism according to claim 1, characterized in that: The folding mechanism further comprises a second bracket fixedly connected to the first bracket, and the connection method between the first bracket and the second bracket comprises one or more of bonding, welding, snap connection, interference fit connection and fastener connection; The second bracket is used to support the first bracket, or the second bracket is used to connect a connecting plate together with the first bracket.

21. The folding mechanism according to claim 20, characterized in that: One of the first bracket and the second bracket is provided with a positioning pin, and the other is provided with a positioning hole, wherein the positioning hole is a through hole or a blind hole; the positioning pin is inserted into the positioning hole.

22. The folding mechanism according to claim 21, characterized in that: The positioning pin is welded in the positioning hole, and the positioning hole is also used to accommodate welding slag.

23. The folding mechanism according to claim 20, characterized in that: The second bracket is provided with a screw column, the first bracket is provided with a through hole, the screw column is passed through the through hole and is used for installing a nut.

24. The folding mechanism according to any one of claims 20 to 23, characterized in that: The second bracket is arranged on the side of the first bracket away from the first swing arm and the second bracket is a shaft cover. The first bracket is provided with a positioning surface and a glue dispensing groove on the side facing the second bracket. The positioning surface is used to support the second bracket. The glue dispensing groove is recessed relative to the positioning surface and is used to accommodate the colloid.

25. The folding mechanism according to claim 24, characterized in that: A screen water drop avoidance groove is provided on a surface of the first bracket facing away from the second bracket, and the screen water drop avoidance groove is used to adapt to the screen in a folded state.

26. The folding mechanism according to any one of claims 20 to 23, characterized in that: The second bracket is fixedly connected to one side of the first bracket along the center line direction of the first bracket, and a fourth swing arm is rotatably connected to the second bracket.

27. The folding mechanism according to claim 26, characterized in that: The outer surface of the first bracket is a curved surface, and the curved surface is used to adapt to the screen in the folded state.

28. The folding mechanism according to any one of claims 1 to 8, characterized in that: A support platform is provided on the surface of the first bracket, and the support platform is used to support a connecting plate connected to the first swing arm when the first swing arm is in an unfolded state.

29. The folding mechanism according to any one of claims 1 to 8, characterized in that: At least one side of the first bracket is provided with a weight-reducing groove.

30. A foldable mobile terminal, comprising a first shell, a second shell and a screen, wherein the screen covers the first shell and the second shell, characterized in that: The foldable mobile terminal further comprises the folding mechanism as claimed in any one of claims 1 to 29, and the first shell and the second shell are opened or closed by the folding mechanism.

31. A folding mechanism, characterized in that: The folding mechanism comprises: A first bracket, the first bracket is an integrally formed structure, a first slide groove surface and a second slide groove surface are integrally provided on the first bracket, the first slide groove surface and the second slide groove surface are both arc-shaped surfaces and are coaxially arranged, and the first slide groove surface and the second slide groove surface are spaced apart along the axial direction of the first slide groove surface, and a molding process slot hole is also provided on the first bracket, the molding process slot hole is a groove or a through hole, and the molding process slot hole is arranged opposite to the first slide groove surface or the second slide groove surface to expose the first slide groove surface or the second slide groove surface; A first swing arm, two surfaces of which are respectively in contact with the first slide groove surface and the second slide groove surface and are rotationally matched; The second swing arm is rotatably connected to the first bracket, the first swing arm and the second swing arm are spaced apart along the center line direction of the first bracket, and the rotation connection structures of the first swing arm and the second swing arm are integrated on the first bracket; wherein: The second swing arm is rotatably connected to the first bracket via a rotating shaft and a rotating shaft hole, the rotating shaft is rotatably inserted into the rotating shaft hole, wherein the second swing arm is provided with the rotating shaft, the rotating shaft hole is provided on the first bracket and the inner surface of the rotating shaft hole is an integrally formed cylindrical surface, or the rotating shaft is integrally formed on the first bracket, and the second swing arm is provided with the rotating shaft hole; or, The first bracket is also provided with a third slide groove surface and a fourth slide groove surface, which are coaxially arranged and are both arc-shaped surfaces, and the two opposite surfaces of the second swing arm are respectively in contact with and rotationally matched with the third slide groove surface and the fourth slide groove surface.

32. The folding mechanism according to claim 31, characterized in that: The radii of the first chute surface and the second chute surface are different.

33. The folding mechanism according to claim 31, characterized in that: The first swing arm has a first end, and the two opposite surfaces of the first end respectively include a first matching portion and a second matching portion, the first matching portion and the second matching portion are both arc-shaped surfaces, the first matching portion is in contact with and slidably fits with the first slide groove surface, and the second matching portion is in contact with and slidably fits with the second slide groove surface.

34. The folding mechanism according to claim 33, characterized in that: The first end is provided with at least two first matching parts, and the at least two first matching parts are arranged at intervals along the axial direction of the first slide groove surface and are respectively arranged on both sides of the second matching part; the number of the first slide groove surfaces is multiple, and each first matching part is slidably matched with a corresponding first slide groove surface.

35. The folding mechanism according to claim 34, characterized in that: The first bracket is also provided with a limiting surface, the first slide groove surface is opposite to the limiting surface and is spaced apart from each other to jointly enclose a receiving space, and the first matching portion is rotatably received in the receiving space.

36. The folding mechanism according to claim 31, characterized in that: The first bracket includes a first bracket body and a first boss disposed on the first bracket body, and the first slide groove surface is disposed on one side of the first boss; The first bracket body is provided with the molding process slot hole arranged opposite to the first slide groove surface.

37. The folding mechanism according to claim 36, characterized in that: The first bracket further includes a second boss disposed on one side of the first bracket body, and the second slide groove surface is disposed on one side of the second boss.

38. The folding mechanism according to any one of claims 31 to 37, characterized in that: The first bracket includes a first side portion and a second side portion, the first side portion and the second side portion are respectively located on both sides of a center line of the first bracket, the first side portion is provided with the first slide groove surface and the second slide groove surface having a first axis, and the second side portion is provided with the first slide groove surface and the second slide groove surface having a second axis, and the center line of the first bracket is parallel to the first axis and the second axis; The folding mechanism includes at least two first swing arms, and the at least two first swing arms are rotatably connected to the first side portion and the second side portion respectively.

39. The folding mechanism according to any one of claims 31 to 37, characterized in that: The first bracket is provided with a first stopping structure, and the first stopping structure is used to stop the first swing arm when the first swing arm is in an unfolded state or a folded state.

40. The folding mechanism according to claim 39, characterized in that: A first mounting hole is provided on the first swing arm; the first stopping structure includes a first stop block provided on the first bracket, the first stop block is passed through the first mounting hole, and the first stop block is used to support the first swing arm when the first swing arm is in an unfolded state or a folded state.

41. The folding mechanism according to claim 39, characterized in that: The first bracket has an inner surface and an outer surface that are arranged opposite to each other, the first swing arm is folded in a direction away from the outer surface, and a second mounting hole is provided on the first bracket; The first stop structure includes a first stop block disposed on the first bracket, the first stop block receiving In the second mounting hole, the first stop block has a first stop surface facing away from the inner surface, and the first stop surface is used to abut against the first swing arm when the first swing arm is in an expanded state.

42. The folding mechanism according to claim 39, characterized in that: The first stop structure includes a second stop surface arranged on an edge of the first bracket, and the second stop surface is used to abut against the first swing arm when the first swing arm is in an expanded state.

43. The folding mechanism according to claim 31, characterized in that: The third chute surface and the fourth chute surface are arranged at intervals along the axial direction of the third chute surface; The second swing arm has two opposite surfaces respectively provided with a third matching portion and a fourth matching portion, the third matching portion is fitted and slidably matched with the third slide groove surface, and the fourth matching portion is fitted and slidably matched with the fourth slide groove surface.

44. The folding mechanism according to any one of claims 31 to 37, characterized in that: The first bracket is provided with a third stop surface and a fourth stop surface, the third stop surface is used to abut the second swing arm when the second swing arm is in an unfolded state, and the fourth stop surface is used to abut the second swing arm when the second swing arm is in a folded state.

45. The folding mechanism according to claim 44, characterized in that: The second swing arm is provided with a second stop block, and the second stop block is used to abut against the fourth stop surface when the second swing arm is in a folded state.

46. ​​The folding mechanism according to claim 31, characterized in that: The folding mechanism further comprises a second bracket fixedly connected to the first bracket, and the connection method between the first bracket and the second bracket comprises one or more of bonding, welding, snap connection, interference fit connection and fastener connection; The second bracket is used to support the first bracket, or the second bracket is used to connect a connecting plate together with the first bracket.

47. The folding mechanism according to claim 46, characterized in that: One of the first bracket and the second bracket is provided with a positioning pin, and the other is provided with a positioning hole, wherein the positioning hole is a through hole or a blind hole; the positioning pin is inserted into the positioning hole.

48. The folding mechanism according to claim 47, characterized in that: The positioning pin is welded in the positioning hole, and the positioning hole is also used to accommodate welding slag.

49. The folding mechanism according to claim 46, characterized in that: The second bracket is provided with a screw column, the first bracket is provided with a through hole, the screw column is passed through the through hole and is used for installing a nut.

50. The folding mechanism according to any one of claims 46 to 49, characterized in that: The second bracket is arranged on the side of the first bracket away from the first swing arm and the second bracket is a shaft cover. The first bracket is provided with a positioning surface and a glue dispensing groove on the side facing the second bracket. The positioning surface is used to support the second bracket. The glue dispensing groove is recessed relative to the positioning surface and is used to accommodate the colloid.

51. The folding mechanism according to claim 50, characterized in that: A screen water drop avoidance groove is provided on a surface of the first bracket facing away from the second bracket, and the screen water drop avoidance groove is used to adapt to the screen in a folded state.

52. The folding mechanism according to any one of claims 46 to 49, characterized in that: The second bracket is fixedly connected to one side of the first bracket along the center line direction of the first bracket, and a fourth swing arm is rotatably connected to the second bracket.

53. The folding mechanism according to claim 52, characterized in that: The outer surface of the first bracket is a curved surface, and the curved surface is used to adapt to the screen in the folded state.

54. The folding mechanism according to any one of claims 31 to 37, characterized in that: A support platform is provided on the surface of the first bracket, and the support platform is used to support a connecting plate connected to the first swing arm when the first swing arm is in an unfolded state.

55. The folding mechanism according to any one of claims 31 to 37, characterized in that: At least one side of the first bracket is provided with a weight-reducing groove.

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