Foldable mechanism and foldable terminal

Abstract

The embodiments of the present application provide a foldable mechanism and a foldable terminal, which are used to reduce the size of the foldable mechanism and achieve a lightweight and thin design of the foldable terminal. The foldable mechanism includes a limiting base, a first fixed frame, a first main swing arm, a first auxiliary swing arm, and a first damping swing arm. The first main swing arm is rotatably connected to the first fixed frame and slidably and rotatably connected to the limiting base. The first auxiliary swing arm is slidably connected to the first fixed frame and rotatably connected to the limiting base. The first damping swing arm is slidably and rotatably connected to the first fixed frame and rotatably connected to the limiting base. The rotation center of the first auxiliary swing arm relative to the limiting base is the first center, and the rotation center of the first damping swing arm relative to the limiting base is the second center, and the first center and the second center are spaced apart from each other.

Description

Technical Field

[0001] The present application relates to the field of foldable terminals, and in particular to a foldable mechanism and a foldable terminal. Background Art

[0002] With the advancement of technology, the era of large-screen smart terminals has arrived. Foldable terminals are highly favored by users due to their large screens and easy portability. Currently, foldable terminals often use a folding mechanism to achieve folding and unfolding. Existing foldable mechanisms generally utilize damping components to provide damping to enhance the user experience. However, the damping swing arm of the damping assembly often needs to be compatible with the structure of other swing arms, resulting in a low degree of assembly freedom for the damping swing arm, which is not conducive to reducing the size of the foldable mechanism and achieving a compact design for the foldable terminal. Summary of the Invention

[0003] The present application provides a foldable mechanism and a foldable terminal, which are used to reduce the size of the foldable mechanism and achieve a lightweight and thin design of the foldable terminal.

[0004] In a first aspect, the present application provides a foldable mechanism, comprising a position-limiting base, a connecting assembly, and a damping assembly, wherein the connecting assembly is connected to the position-limiting base, and the damping assembly is connected to both the position-limiting base and the connecting assembly.

[0005] The connecting assembly includes a first fixed frame, a first main swing arm, and a first auxiliary swing arm. The first main swing arm includes a rotating portion, a sliding portion, and a connecting portion connecting the rotating portion and the sliding portion. The rotating portion of the first main swing arm is rotatably connected to the first fixed frame, thereby rotating the first main swing arm to the first fixed frame. The sliding portion of the first main swing arm is slidably and rotatably connected to a limit base, thereby sliding and rotatably connecting the first main swing arm to the limit base.

[0006] The first auxiliary swing arm includes a rotating portion, a sliding portion, and a connecting portion connecting the rotating portion and the sliding portion. The sliding portion of the first auxiliary swing arm is slidably connected to the first fixed frame, thereby slidably connecting the first auxiliary swing arm to the first fixed frame. The rotating portion of the first auxiliary swing arm is rotatably connected to the limit base, thereby rotatably connecting the first auxiliary swing arm to the limit base. The rotation center of the rotating portion of the first auxiliary swing arm relative to the limit base is the first center. In other words, the rotation center of the first auxiliary swing arm relative to the limit base is the first center.

[0007] The damping assembly includes a damping member and a first damping swing arm. The damping member is mounted on a limiting base. The first damping swing arm includes a rotating portion, a sliding portion, and a connecting portion connected to the rotating portion and the sliding portion. The sliding portion of the first damping swing arm slides and rotates to connect to the first fixed frame, so that the first damping swing arm slides and rotates to connect to the first fixed frame. The rotating portion of the first damping swing arm rotationally connects to the damping member, so that the first damping swing arm rotationally connects to the damping member. The rotation center of the rotating portion of the first damping swing arm relative to the damping member is the second center. That is, the rotation center of the first damping swing arm relative to the damping member is the second center.

[0008] The first center and the second center are spaced apart from each other.

[0009] Exemplarily, the limiting base extends along the Y-axis, the first center and the second center are both parallel to the Y-axis, and are spaced apart from each other along the X-axis, wherein the X-axis and the Y-axis are perpendicular to each other.

[0010] It should be noted that the qualifiers such as parallel and perpendicular mentioned in the embodiments of the present application regarding relative positional relationships are all based on the current state of the art, rather than being absolutely strict definitions in a mathematical sense. A small amount of deviation is allowed, and both approximately parallel and approximately perpendicular are acceptable. For example, A and B are parallel, which means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 degrees and 10 degrees. For example, A and B are perpendicular, which means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80 degrees and 100 degrees.

[0011] In the foldable mechanism disclosed herein, when the first fixed frame rotates relative to the limiting base, it drives the first main swing arm to rotate relative to the first fixed frame and slide relative to the limiting base. It also drives the first auxiliary swing arm to slide relative to the first fixed frame and rotate relative to the limiting base. It also drives the first damping swing arm to slide and rotate relative to the first fixed frame and rotate relative to the damping member. Because the first center and the second center are spaced apart, i.e., the rotation center of the first damping swing arm does not coincide with the rotation center of the first auxiliary swing arm, the assembly position of the first damping swing arm on the limiting base does not need to align with the assembly position of the first auxiliary swing arm on the limiting base. This increases the degree of freedom in assembly between the first damping swing arm and the limiting base, and helps reduce the size of the foldable mechanism.

[0012] In one embodiment, the second center is located inside the first center, that is, the second center is located on the side of the first center close to the center of the limiting base, which helps to reduce the size of the foldable mechanism along the X-axis direction.

[0013] In some other embodiments, the second center may also be located on the outside, top side, or bottom side of the first center.

[0014] In one embodiment, the connection assembly of the foldable mechanism further includes a second fixed frame, a second main swing arm, and a second auxiliary swing arm. The second main swing arm includes a rotating portion, a sliding portion, and a connecting portion connected to the rotating portion and the sliding portion. The rotating portion of the second main swing arm is rotatably connected to the second fixed frame, thereby rotatably connecting the second main swing arm to the second fixed frame. The sliding portion of the second main swing arm is slidably and rotatably connected to a limit base, thereby slidably and rotatably connecting the second main swing arm to the limit base.

[0015] The second auxiliary swing arm includes a rotating portion, a sliding portion, and a connecting portion connecting the rotating portion and the sliding portion. The sliding portion of the second auxiliary swing arm is slidably connected to the second fixed frame, thereby slidably connecting the second auxiliary swing arm to the second fixed frame. The rotating portion of the second auxiliary swing arm is rotatably connected to the limit base, thereby rotatably connecting the second auxiliary swing arm to the limit base.

[0016] The damping assembly of the foldable mechanism also includes a second damping swing arm. The second damping swing arm includes a rotating portion, a sliding portion, and a connecting portion connecting the rotating portion and the sliding portion. The sliding portion of the second damping swing arm is slidably and rotationally connected to the second fixed frame, thereby sliding and rotationally connecting the second damping swing arm to the second fixed frame. The rotating portion of the second damping swing arm is rotationally connected to the damping member, thereby rotationally connecting the second damping swing arm to the damping member.

[0017] When the second fixing frame rotates relative to the limiting base, it drives the second main swing arm to rotate relative to the second fixing frame, and slide and rotate relative to the limiting base, and also drives the second auxiliary swing arm to slide relative to the second fixing frame and rotate relative to the limiting base, and also drives the second damping swing arm to slide relative to the second fixing frame and rotate relative to the limiting base.

[0018] Among them, the direction of rotation of the first fixing frame relative to the limiting base is the first direction, and the direction of rotation of the second fixing frame relative to the limiting base is the second direction, and the second direction is opposite to the first direction, so as to realize relative expansion or relative folding between the first fixing frame and the second fixing frame, and thus realize the mutual switching of the foldable mechanism between the folded state and the expanded state.

[0019] In one embodiment, the rotation center of the rotating portion of the second auxiliary swing arm relative to the limit base is the third center. That is, the rotation center of the second auxiliary swing arm relative to the limit base is the third center. The third center is parallel to and spaced apart from the first center. The rotation center of the rotating portion of the second damping swing arm relative to the limit base is the fourth center. That is, the rotation center of the second damping swing arm relative to the limit base is the fourth center. The fourth center is parallel to and spaced apart from the second center, and is also spaced apart from the third center.

[0020] Exemplarily, the third center and the fourth center are both parallel to the Y-axis direction and spaced apart from each other along the X-axis direction.

[0021] When the second fixed frame rotates relative to the limiting base, since the fourth center and the third center are spaced apart from each other, that is, the rotation center of the second damping swing arm does not coincide with the rotation center of the second auxiliary swing arm, the assembly position of the second damping swing arm on the limiting base does not need to be adapted to the assembly position of the second auxiliary swing arm on the limiting base, thereby improving the assembly freedom between the second damping swing arm and the limiting base and helping to reduce the size of the foldable mechanism.

[0022] In one embodiment, the fourth center is located inward of the third center. That is, the fourth center is located on the side of the third center facing the first center. In other words, the fourth center is located on the side of the third center closer to the center of the limiting base, which helps to reduce the size of the foldable mechanism along the X-axis.

[0023] In some other embodiments, the fourth center may also be located on the outside, top side, or bottom side of the third center.

[0024] In one embodiment, the damping assembly of the foldable mechanism further includes a damping member, and the damping member is installed on the limiting base.

[0025] The damping element of the foldable mechanism includes a first damping shaft, a second damping shaft, and a damping plate. The first damping shaft and the second damping shaft are both mounted on a limiting base and are arranged parallel and spaced apart. For example, the axes of the first damping shaft and the second damping shaft are both parallel to the Y-axis.

[0026] The rotating portion of the first damping swing arm is sleeved on the first damping shaft, so that the first damping swing arm is sleeved on the first damping shaft. The axis of the first damping shaft is the second center. The rotating portion of the second damping swing arm is sleeved on the second damping shaft, so that the second damping swing arm is sleeved on the second damping shaft. The axis of the second damping shaft is the fourth center.

[0027] The damping plate is sleeved on the first damping shaft and the second damping shaft, and is arranged along the axial direction of the first damping shaft with the first damping swing arm and the second damping swing arm. That is, along the Y-axis, the damping plate is arranged sequentially with the first damping swing arm and then with the second damping swing arm. Exemplarily, there are multiple damping plates, and the multiple damping plates are arranged sequentially along the Y-axis.

[0028] When the first damping swing arm and the second damping swing arm rotate relative to the damping member, the damping plate can generate a damping force. When the user folds or unfolds the foldable mechanism, the user can also clearly feel the damping force generated by the damping plate, which provides a better hand feel and enhances the user experience.

[0029] In one embodiment, the damping element of the foldable mechanism further includes a first damping sleeve and a second damping sleeve. The first damping sleeve is sleeved on the first damping shaft and mounted on a limiting base. The first damping sleeve is rotatable relative to the first damping shaft to generate a damping force. The second damping sleeve is sleeved on the second damping shaft and mounted on the limiting base. The second damping sleeve is rotatable relative to the second damping shaft to generate a damping force.

[0030] When the user is folding or unfolding the foldable mechanism, the user can also clearly feel the damping force generated by the first damping sleeve and the second damping sleeve, and the user can experience a better hand feel, thereby improving the user experience.

[0031] In one embodiment, there are two first damping sleeves, spaced apart along the axial direction of the first damping shaft, and both hingedly connected to the first damping swing arm. The hinge surface of the first damping sleeves includes multiple crests and troughs, which are arranged alternately. The hinge surface of the first damping swing arm also includes multiple crests and troughs, which are arranged alternately.

[0032] When the foldable mechanism moves from a folded state to a flattened state, the peaks of the hinged surface of the first damping swing arm enter the troughs of the hinged surface of the first damping sleeve. Simultaneously, the peaks of the hinged surface of the first damping sleeve enter the troughs of the hinged surface of the first damping swing arm. At this point, the damping force generated by the rotation of the first damping swing arm relative to the first damping shaft is relatively small, allowing users to experience the feel of the foldable mechanism being fully flattened.

[0033] In one embodiment, there are two second damping sleeves, spaced apart along the axial direction of the second damping shaft, and both hingedly connected to the second damping sleeve. The hinge surface of the first damping sleeve includes multiple crests and troughs, which are arranged alternately. The hinge surface of the first damping swing arm also includes multiple crests and troughs, which are arranged alternately.

[0034] When the foldable mechanism moves from a folded state to a flattened state, the peaks of the hinged surface of the second damping swing arm enter the troughs of the hinged surface of the second damping sleeve. Simultaneously, the peaks of the hinged surface of the second damping sleeve enter the troughs of the hinged surface of the second damping swing arm. At this point, the damping force generated by the rotation of the second damping swing arm relative to the second damping shaft is relatively small, allowing users to experience the feel of the foldable mechanism being fully flattened.

[0035] In one embodiment, the foldable mechanism further includes a pressure plate assembly connected to the limiting base and the connecting assembly. The pressure plate assembly includes a first pressure plate, a second pressure plate, a first pressure plate swing arm, and a second pressure plate swing arm. The first pressure plate is slidably and rotatably connected to the first fixed frame. The second pressure plate is slidably and rotatably connected to the second fixed frame.

[0036] The first pressure plate swing arm includes a rotating portion, a sliding portion, and a connecting portion connecting the rotating portion and the sliding portion. The rotating portion of the first pressure plate swing arm is rotatably connected to the limit base, thereby rotating the first pressure plate swing arm to the limit base. The sliding portion of the first pressure plate swing arm is slidably connected to the first pressure plate, thereby slidably connecting the first pressure plate swing arm to the first pressure plate.

[0037] The second pressure plate swing arm includes a rotating portion, a sliding portion, and a connecting portion connecting the rotating portion and the sliding portion. The rotating portion of the second pressure plate swing arm is rotatably connected to the limit base, thereby rotating the second pressure plate swing arm to the limit base. The sliding portion of the second pressure plate swing arm is slidably connected to the second pressure plate, thereby slidably connecting the second pressure plate swing arm to the second pressure plate.

[0038] When the foldable mechanism is in a flattened state, the first pressing plate and the second pressing plate are respectively located on both sides of the limiting base; when the foldable mechanism is in a folded state, the first pressing plate and the second pressing plate are arranged opposite to each other.

[0039] In one embodiment, there are six first pressure plate swing arms. The six first pressure plate swing arms are sequentially spaced apart along the extension direction of the limiting base to improve the rotational stability of the first pressure plate relative to the limiting base.

[0040] In one embodiment, there are six second pressure plate swing arms. The six second pressure plate swing arms are sequentially spaced apart along the extension direction of the limiting base to improve the rotational stability of the second pressure plate relative to the limiting base.

[0041] In one embodiment, the foldable mechanism further includes a floating plate, and the floating plate is installed on the limiting base.

[0042] When the foldable mechanism is in a flattened state, the top surface of the floating plate is flush with the top surfaces of the first pressing plate and the second pressing plate, and the top surfaces of the floating plate, the first pressing plate and the second pressing plate form a supporting surface.

[0043] When the foldable mechanism is used in a foldable terminal, the supporting surface can support the foldable part of the display screen, which not only ensures a good display of the display screen, but also prevents the foldable part from being damaged or dented due to external force when the foldable part is touched, thereby improving the reliability of the display screen.

[0044] In one embodiment, when the foldable mechanism is in the folded state, the first fixing frame, the second fixing frame, the first support plate, the second support plate, and the floating plate enclose a clearance space. For example, the cross-section of the clearance space is substantially in the shape of a "teardrop."

[0045] When the foldable mechanism is used in a foldable terminal, the foldable mechanism can avoid the R angle formed when the foldable part is bent, so that the foldable part will not bend at a large angle, avoiding undesirable scenes such as creases on the display screen, and helping to extend the service life of the display screen.

[0046] In one embodiment, the floating plate is mounted on the limiting base via an elastic member such as a spring.

[0047] The first pressure plate swing arm and the second pressure plate swing arm also include a supporting portion, which is fixedly connected to a side of the rotating portion away from the connecting portion.

[0048] When the foldable mechanism is in a flattened state, the supporting portion of the first pressure plate swing arm and the supporting portion of the second pressure plate swing arm both abut against the bottom surface of the floating plate, so that the first pressure plate swing arm and the second pressure plate swing arm both abut against the bottom surface of the floating plate, so that the top surface of the floating plate is flush with the top surface of the first pressure plate and the top surface of the second pressure plate.

[0049] When the foldable mechanism switches from the flattened state to the folded state, the elastic member drives the floating plate to sink relative to the base.

[0050] When the foldable mechanism switches from the folded state to the flattened state, the abutting portion of the first pressure plate swing arm and the abutting portion of the second pressure plate swing arm both abut the bottom surface of the floating plate to drive the floating plate to float relative to the base.

[0051] In one embodiment, the first fixing bracket is provided with a first guide groove, and the second fixing bracket is provided with a second guide groove.

[0052] The first pressure plate includes a first support plate and a first guide slider, wherein the first guide slider is fixedly connected to the bottom surface of the first support plate. The first guide slider is installed in the first guide groove and can slide and rotate relative to the first fixing frame to achieve a sliding and rotating connection between the first pressure plate and the first fixing frame.

[0053] The second pressure plate includes a second support plate and a second guide slider, the second guide slider being fixedly connected to the bottom surface of the second support plate. The second guide slider is installed in the second guide groove and can slide and rotate relative to the second fixing frame to achieve a sliding and rotating connection between the second pressure plate and the second fixing frame.

[0054] In one embodiment, the first support plate and the first guide slider are integrally formed to ensure the overall strength of the first pressure plate and simplify the preparation process of the first pressure plate, and / or the second support plate and the second guide slider are integrally formed to ensure the overall strength of the second pressure plate and simplify the preparation process of the second pressure plate.

[0055] In one embodiment, the first pressure plate is provided with a first guide hole, and the sliding portion of the first pressure plate swing arm is passed through the first guide hole and can slide relative to the first pressure plate, so that the first pressure plate swing arm is slidably installed in the first guide hole, thereby realizing a sliding connection between the first pressure plate swing arm and the first pressure plate.

[0056] The second pressure plate is provided with a second guide hole, and the sliding portion of the second pressure plate swing arm is passed through the second guide hole and can slide relative to the second pressure plate, so that the second pressure plate swing arm is slidably installed in the second guide hole, thereby realizing a sliding connection between the second pressure plate swing arm and the second pressure plate.

[0057] In one embodiment, the first pressure plate further includes a first auxiliary plate, which is fixedly connected to the bottom surface of the first support plate and is enclosed with the first support plate to form a first guide hole, and the first pressure plate swing arm is slidably installed in the first guide hole.

[0058] The second pressing plate also includes a second auxiliary plate, which is fixedly connected to the bottom surface of the second supporting plate and enclosed with the second supporting plate to form a second guide hole, and the second pressing plate swing arm is slidably installed in the second guide hole.

[0059] In one embodiment, the first support plate and the first auxiliary plate are integrally formed to ensure the overall strength of the first pressing plate and simplify the preparation process of the first pressing plate, and / or the first support plate and the second auxiliary plate are integrally formed to ensure the overall strength of the second pressing plate and simplify the preparation process of the second pressing plate.

[0060] In one embodiment, the foldable mechanism further includes a synchronization assembly comprising a plurality of gears, each of which is mounted on a position-limiting base. Adjacent gears mesh with each other, one gear being mounted on the first damping shaft and the other being mounted on the second damping shaft. When the first damping swing arm drives the first damping shaft to rotate, the gear mounted on the first damping shaft rotates. Adjacent gears mesh with each other to achieve transmission, thereby driving the gear mounted on the second damping shaft to rotate, which in turn drives the second damping shaft and the second damping swing arm to rotate, thereby achieving synchronized rotation between the first damping swing arm and the second damping swing arm.

[0061] In one embodiment, the foldable mechanism includes two connecting components, which are arranged at intervals along the extension direction of the limiting base, and each connecting component includes a first fixing frame, a first main swing arm, a first auxiliary swing arm and a first damping swing arm.

[0062] In a second aspect, the present application provides a foldable terminal, comprising a first shell, a second shell and any one of the above-mentioned foldable mechanisms, wherein the foldable mechanism is connected to the first shell and the second shell, and a first fixing frame is fixedly connected to the first shell.

[0063] In the foldable terminal disclosed herein, when the first fixed frame of the foldable mechanism rotates relative to the limiting base, it drives the first main swing arm to rotate relative to the first fixed frame and slide relative to the limiting base. It also drives the first auxiliary swing arm to slide relative to the first fixed frame and rotate relative to the limiting base. It also drives the first damping swing arm to slide relative to the first fixed frame and rotate relative to the limiting base. Because the first center and the second center are spaced apart, i.e., the rotation center of the first damping swing arm does not coincide with the rotation center of the first auxiliary swing arm, the assembly position of the first damping swing arm on the limiting base does not need to be aligned with the assembly position of the first auxiliary swing arm on the limiting base. This increases the degree of assembly freedom between the first damping swing arm and the limiting base, helps reduce the size of the foldable mechanism, and thus helps reduce the size of the foldable terminal, thereby facilitating a miniaturized design of the foldable terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be described below.

[0065] Figure 1 This is a schematic structural diagram of a foldable terminal in one state provided by an embodiment of the present application;

[0066] Figure 2 yes Figure 1 A schematic structural diagram of the foldable terminal in the second state;

[0067] Figure 3 yes Figure 2 A schematic diagram of the exploded structure of the foldable terminal shown;

[0068] Figure 4 yes Figure 3 A schematic diagram of the exploded structure of the foldable device in the foldable terminal shown;

[0069] Figure 5 yes Figure 4 A schematic structural diagram of a foldable mechanism in the foldable device shown;

[0070] Figure 6 yes Figure 5 A schematic diagram of the exploded structure of the foldable mechanism shown;

[0071] Figure 7 yes Figure 6 A schematic structural diagram of the limiting base and the damping assembly in the foldable mechanism shown;

[0072] Figure 8 yes Figure 7 A schematic diagram of the partial structure of the first part of the limiting base is shown;

[0073] Figure 9 yes Figure 7A schematic diagram of the partial structure of the second part of the limiting base is shown;

[0074] Figure 10 yes Figure 7 A schematic structural diagram of the third part of the limiting base shown;

[0075] Figure 11 yes Figure 7 A schematic diagram of the partial structure of the first part of the limiting base and the first damping assembly is shown;

[0076] Figure 12 yes Figure 7 The front structural diagram of the limit base and the damping assembly shown;

[0077] Figure 13 yes Figure 7 A schematic diagram of the partial structure of the second part of the limiting base and the second damping assembly;

[0078] Figure 14 yes Figure 7 A rear structural diagram of the limiting base and the damping assembly is shown;

[0079] Figure 15 yes Figure 6 A schematic structural diagram of the first connecting component in the foldable mechanism shown;

[0080] Figure 16 yes Figure 15 A schematic structural diagram of the first connecting component shown at another angle;

[0081] Figure 17 yes Figure 6 A schematic structural diagram of the second connecting component in the foldable mechanism shown;

[0082] Figure 18 yes Figure 17 A schematic structural diagram of the second connecting component shown at another angle;

[0083] Figure 19 yes Figure 6 A schematic structural diagram of the third connecting component in the foldable mechanism shown;

[0084] Figure 20 yes Figure 19 A schematic structural diagram of the third connecting component shown at another angle;

[0085] Figure 21 yes Figure 6 A schematic structural diagram of the first pressure plate and the first pressure plate swing arm of the pressure plate assembly in the foldable mechanism shown;

[0086] Figure 22 yes Figure 21The schematic diagram of the structure of the first pressing plate and the first pressing plate swing arm at another angle is shown;

[0087] Figure 23 yes Figure 6 A schematic structural diagram of the second pressure plate and the second pressure plate swing arm of the pressure plate assembly in the foldable mechanism shown;

[0088] Figure 24 yes Figure 23 The schematic diagram of the structure of the second pressing plate and the second pressing plate swing arm at another angle is shown;

[0089] Figure 25 yes Figure 1 A schematic structural diagram of a foldable mechanism in the foldable terminal shown;

[0090] Figure 26 yes Figure 5 A schematic cross-sectional view of the foldable mechanism taken along point II;

[0091] Figure 27 yes Figure 26 A schematic structural diagram of the foldable mechanism shown in the folded state;

[0092] Figure 28 yes Figure 2 A schematic diagram of a partial cross-sectional structure of the foldable terminal shown;

[0093] Figure 29 yes Figure 1 A schematic diagram of the partial cross-sectional structure of the foldable terminal shown. DETAILED DESCRIPTION

[0094] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application.

[0095] See also Figure 1 and Figure 2 , Figure 1 1 is a structural diagram of a foldable terminal 1000 in one state provided by an embodiment of the present application. Figure 2 yes Figure 1 The structure diagram of the foldable terminal 1000 is shown in the second state.

[0096] The foldable terminal 1000 can be a foldable electronic product such as a mobile phone, tablet computer, personal computer, multimedia player, e-book reader, laptop computer, vehicle-mounted device, or wearable device. In this embodiment, the foldable terminal 1000 is a foldable mobile phone. That is, the foldable terminal 1000 is a mobile phone that can switch between a folded state and an unfolded state.

[0097] For the sake of convenience of description, the length direction of the foldable terminal 1000 is defined as the X-axis direction, the length direction of the foldable terminal 1000 is defined as the Y-axis direction, and the thickness direction of the foldable terminal 1000 is defined as the Z-axis direction. The X-axis direction, the Y-axis direction and the Z-axis direction are perpendicular to each other.

[0098] It should be noted that the qualifiers such as parallel and perpendicular mentioned in the embodiments of the present application regarding relative positional relationships are all based on the current state of the art, rather than being absolutely strict definitions in a mathematical sense. A small amount of deviation is allowed, and both approximately parallel and approximately perpendicular are acceptable. For example, A and B are parallel, which means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 degrees and 10 degrees. For example, A and B are perpendicular, which means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80 degrees and 100 degrees.

[0099] In this embodiment, the extension direction of the rotation axis of the foldable terminal 1000 is the Y-axis direction. That is, the foldable terminal 1000 can be relatively unfolded or relatively folded around the Y-axis direction. Figure 1 The foldable terminal 1000 is shown in a folded state. The size of the foldable terminal 1000 along the X-axis direction is relatively small, and the foldable terminal 1000 is easy to carry. Figure 2 The foldable terminal 1000 is shown in an unfolded state. The size of the foldable terminal 1000 along the X-axis direction is large, and the foldable terminal 1000 has a large display area. Figure 2 The unfolding angle α of the foldable terminal 1000 is 180 degrees. Figure 2 The foldable terminal 1000 is shown in a flattened state.

[0100] It should be noted that the angles illustrated in the embodiments of this application are allowed to have slight deviations. For example, Figure 2 The unfolding angle α of the foldable terminal 1000 is shown as 180 degrees, which means that α can be 180 degrees or approximately 180 degrees, such as 170 degrees, 175 degrees, 185 degrees, and 190 degrees. The angles described below by way of example can be understood in the same way.

[0101] It should be understood that the foldable terminal 1000 shown in the embodiment of the present application is a terminal that can be folded once. In other embodiments, the foldable terminal 1000 can also be a terminal that can be folded multiple times (more than twice). In this case, the foldable terminal 1000 can include multiple parts, and two adjacent parts can be folded relatively close to each other until the foldable terminal 1000 is in a folded state, and the two adjacent parts can also be unfolded relatively far apart until the foldable terminal 1000 is in an unfolded state.

[0102] Please also refer to Figure 3 , Figure 3 yes Figure 2 FIG. 1 is a schematic diagram of the exploded structure of the foldable terminal 1000 .

[0103] The foldable terminal 1000 includes a foldable device 100 and a display screen 200, which is mounted on the foldable device 100. The display screen 200 includes a display surface (not shown) facing away from the foldable device 100, which is used to display information such as text, images, or videos. In this embodiment, the display screen 200 includes a first display portion 210, a second display portion 220, and a foldable portion 230, which is connected between the first display portion 210 and the second display portion 220. The foldable portion 230 can be bent about the Y-axis.

[0104] like Figure 1 As shown, when the foldable terminal 1000 is in the folded state, the first display portion 210 and the second display portion 220 are arranged relative to each other, and the foldable portion 230 is bent. At this time, the display screen 200 is in the folded state, and the exposed area of ​​the display screen 200 is relatively small, which can greatly reduce the probability of the display screen 200 being damaged and achieve effective protection for the display screen 200. Figure 2 As shown, when the foldable terminal 1000 is in the unfolded state, the first display portion 210 and the second display portion 220 are relatively unfolded, and the foldable portion 230 is flattened without bending. At this time, the angles α between the first display portion 210, the second display portion 220, and the foldable portion 230 are all α. The display screen 200 has a large display area, realizing a large-screen display for the foldable terminal 1000 and improving the user experience.

[0105] It should be understood that the foldable terminal 1000 shown in the embodiment of the present application is folded inwardly, and the display screen 200 of the foldable terminal 1000 in the folded state is located on the inner side of the foldable device 100. In other embodiments, the foldable terminal 1000 can also be folded in an outwardly folding manner, in which case the display screen 200 of the foldable terminal 1000 in the folded state is located on the outer side of the foldable device 100.

[0106] Please also refer to Figure 4 , Figure 4 yes Figure 3 FIG. 1 is a schematic diagram of the exploded structure of the foldable device 100 in the foldable terminal 1000 .

[0107] In this embodiment, the foldable device 100 includes a first housing 110, a second housing 120, and a folding mechanism 130. The folding mechanism 130 is connected between the first housing 110 and the second housing 120 to achieve a rotational connection between the first housing 110 and the second housing 120. Specifically, the first housing 110 supports a first display portion 210, and the second housing 120 supports a second display portion 220. In other words, the first display portion 210 is mounted on the first housing 110, and the second display portion 220 is mounted on the second housing 120. The folding mechanism 130 is disposed opposite the folding portion 230.

[0108] The first shell 110 and the second shell 120 can be relatively rotated by the foldable mechanism 130, so that the foldable device 100 can be switched between the folded state and the unfolded state. Specifically, the first shell 110 and the second shell 120 can be relatively rotated to be opposite to each other, so that the foldable device 100 is in the folded state, such as Figure 1 At this time, the foldable mechanism 130 is in the folded state. The first shell 110 and the second shell 120 can also be rotated relative to each other to be relatively unfolded, so that the foldable device 100 is in the unfolded state, as shown. Figure 2 As shown. At this time, the foldable mechanism 130 is in the unfolded state. For example, Figure 2 The foldable terminal 1000 is shown in a flattened state, with an angle α between the first housing 110 and the second housing 120. At this time, the foldable mechanism 130 is in a flattened state.

[0109] The first housing 110 is provided with a first receiving groove 1101, which is located on a side of the first housing 110 facing the second housing 120. The opening of the first receiving groove 1101 is located on the top surface of the first housing 110. The first receiving groove 1101 is recessed from the top surface toward the bottom surface of the first housing 110 and extends through the right side surface of the first housing 110.

[0110] The second housing 120 has the same structure as the first housing 110 and is mirror-symmetrical with respect to the foldable mechanism 130. The second housing 120 is provided with a second receiving groove 1201, which is located on the side of the second housing 120 facing the first housing 110. The opening of the second receiving groove 1201 is located on the top surface of the second housing 120. The second receiving groove 1201 is recessed from the top surface of the second housing 120 toward the bottom surface and extends through the side of the second housing 120 facing the first housing 110.

[0111] When the foldable device 100 is in a flattened state, that is, when the angle α between the first shell 110 and the second shell 120 is formed, the first receiving groove 1101 and the second receiving groove 1201 enclose a receiving space 1301. The foldable mechanism 130 is installed in the receiving space 1301. Part of the foldable mechanism 130 is installed in the first receiving groove 1101 of the first shell 110, and part of the foldable mechanism 130 is installed in the second receiving groove 1201 of the second shell 120.

[0112] It should be noted that the directional terms such as “top”, “bottom”, “left”, “right”, “front” and “back” used in the embodiment of the present application to describe the foldable terminal 1000 are mainly based on the position of the foldable terminal 1000 in the attached Figure 2 The display orientation is explained in the figure, with the positive direction of the Z axis as the "top", the negative direction of the Z axis as the "bottom", the positive direction of the X axis as the "right", the negative direction of the X axis as the "left", the positive direction of the Y axis as the "back", and the negative direction of the Y axis as the "front". It does not constitute a limitation on the orientation of the foldable terminal 1000 in actual application scenarios.

[0113] Existing foldable mechanisms generally utilize damping components that provide damping force to enhance user experience. However, the assembly position of the damping arm of the damping component often needs to match the assembly position of other arms. In particular, the axis of the damping arm often needs to coincide with the axis of the auxiliary arm. This reduces the assembly freedom of the damping arm, hindering the size of the foldable mechanism and the miniaturization of the foldable terminal. Next, the structure of the foldable mechanism 130 in the foldable terminal 1000 shown in the embodiment of the present application will be described.

[0114] See also Figure 5 and Figure 6 , Figure 5 yes Figure 4 The schematic structural diagram of the foldable mechanism 130 in the foldable device 100 is shown. Figure 6 yes Figure 5 A schematic diagram of the exploded structure of the foldable mechanism 130 is shown.

[0115] The foldable mechanism 130 includes a limiting base 10, a connecting assembly 20, a damping assembly 30, and a pressure plate assembly 40. The connecting assembly 20, the damping assembly 30, and the pressure plate assembly 40 are all mounted on the limiting base 10 and can be folded or unfolded relative to the limiting base 10, thereby being able to switch between the folded and unfolded states. For example, the limiting base 10 extends along the Y-axis.

[0116] In this embodiment, there are three connecting assemblies 20, which are spaced apart from each other along the Y-axis. The three connecting assemblies 20 are a first connecting assembly 20a, a second connecting assembly 20b, and a third connecting assembly 20c, with the third connecting assembly 20c located between the first connecting assembly 20a and the second connecting assembly 20b. The first connecting assembly 20a is located at the front side of the foldable mechanism 130, the second connecting assembly 20b is located at the rear side of the foldable mechanism 130, and the third connecting assembly 20c is located in the middle of the foldable mechanism 130. In other embodiments, there may be one, two, or more than four connecting assemblies 20, and this application does not impose any specific limitation on the number of connecting assemblies 20.

[0117] The first connecting assembly 20a includes a first fixed frame 21a, a second fixed frame 22a, a first main swing arm 23a, a second main swing arm 24a, a first auxiliary swing arm 25a, and a second auxiliary swing arm 26a. The first main swing arm 23a is rotationally connected to the first fixed frame 21a and is slidably and rotationally connected to the position-limiting base 10. The second main swing arm 24a is rotationally connected to the second fixed frame 22a and is slidably and rotationally connected to the position-limiting base 10a. The first auxiliary swing arm 25a is slidably connected to the first fixed frame 21a and is rotationally connected to the position-limiting base 10. The second auxiliary swing arm 26a is slidably connected to the second fixed frame 22a and is rotationally connected to the position-limiting base 10.

[0118] Among them, when the first connecting component 20a switches between the folded state and the unfolded state, the direction in which the first fixed frame 21a, the first main swing arm 23a and the first auxiliary swing arm 25a rotate relative to the limiting base 10 is the first direction, and the direction in which the second fixed frame 22a, the second main swing arm 24a and the second auxiliary swing arm 26a rotate relative to the limiting base 10 is the second direction, and the second direction is opposite to the first direction.

[0119] For example, when the first connecting assembly 20a switches from the folded state to the unfolded state, the first fixing frame 21a, the first main swing arm 23a, and the first auxiliary swing arm 25a rotate counterclockwise relative to the limiting base 10, and the second fixing frame 22a, the second main swing arm 24a, and the second auxiliary swing arm 26a rotate clockwise relative to the limiting base 10. When the first connecting assembly 20a switches from the unfolded state to the folded state, the first main swing arm 23a and the first auxiliary swing arm 25a rotate clockwise relative to the limiting base 10, and the second main swing arm 24a and the second auxiliary swing arm 26a rotate counterclockwise relative to the limiting base 10.

[0120] It should be noted that the second connecting assembly 20b and the first connecting assembly 20a can be identical or similar components, symmetrical or partially symmetrical structures, or different structures. Specifically, the second connecting assembly 20b can be centrally symmetrical with the first connecting assembly 20a. The basic structure of each component in the second connecting assembly 20b, the connection relationship between components, and the connection relationship between components and components outside the assembly can all refer to the relevant design of the first connecting assembly 20a. The second connecting assembly 20b and the first connecting assembly 20a may differ in the detailed structure or positional arrangement of the components.

[0121] In this embodiment, the second connecting assembly 20b includes a first fixing frame 21b, a second fixing frame 22b, a first main swing arm 23b, a second main swing arm 24b, a first auxiliary swing arm 25b, and a second auxiliary swing arm 26b. The structures of the components of the second connecting assembly 20b, as well as their connections with the limiting base 10, the pressure plate assembly 40, and the damping assembly 30, can be referred to in the description of the first connecting assembly 20a.

[0122] The third connecting assembly 20c includes a first fixing bracket 21c, a second fixing bracket 22c, a first main swing arm 23c, and a second main swing arm 24c. The components of the third connecting assembly 20c, as well as their connections with the position-limiting base 10, the pressure plate assembly 40, and the damping assembly 30, can be described with reference to the description of the first connecting assembly 20a. In other embodiments, the third connecting assembly 20c may also include a first auxiliary swing arm and a second auxiliary swing arm (not shown), but this application does not impose specific limitations on this.

[0123] It should be noted that the first fixing bracket 21a of the first connecting assembly 20a, the first fixing bracket 21b of the second connecting assembly 20b, and the first fixing bracket 21c of the third connecting assembly 20c can be independent structural members or multiple parts of an integrated structural member. Furthermore, the second fixing bracket 22a of the first connecting assembly 20a, the second fixing bracket 22b of the second connecting assembly 20b, and the second fixing bracket 22c of the third connecting assembly 20c can be independent structural members or multiple parts of an integrated structural member.

[0124] It should be understood that the "and / or" mentioned in the embodiments of the present application refers to both "and" and "or". For example, A and / or B includes the three situations of only A being present, only B being present, and both A and B being present. The following description of "and / or" should be understood in the same way.

[0125] The damping assembly 30 is slidably and rotationally connected to the connecting assembly 20. In this embodiment, there are two damping assemblies 30, which are spaced apart from each other along the Y-axis direction. The two damping assemblies 30 are respectively a first damping assembly 30a and a second damping assembly 30b. The first damping assembly 30a is slidably and rotationally connected to the first connecting assembly 20a. During the process of folding or unfolding the first connecting assembly 20a relative to the limiting base 10, the first damping assembly 30a can provide a damping force. The second damping assembly 30b is slidably and rotationally connected to the second connecting assembly 20b. During the process of folding or unfolding the second connecting assembly 20b relative to the limiting base 10, the second damping assembly 30b can provide a damping force. When a user is using the foldable terminal 1000, for example, when the foldable terminal 1000 is in a folded state or a flattened state, and when the foldable terminal 1000 switches between the folded state and the unfolded state, the user can clearly feel the damping force provided by the first damping component 30a and the second damping component 30b, and the user can experience a better hand feel, thereby improving the user experience.

[0126] In other embodiments, there may be three damping assemblies 30, namely a first damping assembly 30a, a second damping assembly 30b, and a third damping assembly (not shown). The third damping assembly is slidably connected to the third connecting assembly 20c. The third damping assembly can provide a damping force during the folding or unfolding of the third connecting assembly 20c relative to the limiting base 10. Alternatively, there may be one or more damping assemblies 30. This application does not impose any specific limitation on the number of damping assemblies 30.

[0127] In this embodiment, the first damping assembly 30a includes a damping member 31a, a first damping swing arm 32a, and a second damping swing arm 33a. The damping member 31a is mounted on the limiting base 10. The first damping swing arm 32a is rotationally connected to the damping member 31a and is slidably and rotationally connected to the first fixing bracket 21a. The second damping swing arm 33a is rotationally connected to the damping member 31a and is slidably and rotationally connected to the second fixing bracket 22a.

[0128] It should be noted that the second damping assembly 30b and the first damping assembly 30a can be identical or similar components, symmetrical or partially symmetrical structures, or different structures. Specifically, the second damping assembly 30b can be mirror-symmetrical to the first damping assembly 30a. The basic structure of the components in the second damping assembly 30b, the connections between the components, and the connections between the components and components outside the assembly can all refer to the relevant designs of the first damping assembly 30a. The second damping assembly 30b and the first damping assembly 30a may differ in the detailed structure or positional arrangement of the components.

[0129] In this embodiment, the second damping assembly 30b includes a damping member 31b, a first damping swing arm 32b, and a second damping swing arm 33b. The damping member 31b is mounted on the limiting base 10. The first damping swing arm 32b is rotationally connected to the damping member 31b and is slidably and rotationally connected to the first fixing frame 21b. The second damping swing arm 33b is rotationally connected to the damping member 31b and is slidably and rotationally connected to the second fixing frame 22b. The structures of the various components of the second damping assembly 30b and their connections to the limiting base 10, the second connecting assembly 20b, and the pressure plate assembly 40 can be referred to in the description of the first damping assembly 30a.

[0130] The pressure plate assembly 40 is slidably and rotatably connected to the connecting assembly 20. In this embodiment, the pressure plate assembly 40 includes a first pressure plate 41, a second pressure plate 42, a first pressure plate swing arm 43, and a second pressure plate swing arm 44. The front side of the first pressure plate 41 is slidably and rotatably connected to the first fixed frame 21a, the rear side of the first pressure plate 41 is slidably and rotatably connected to the first fixed frame 21b, and the middle portion of the first pressure plate 41 is slidably and rotatably connected to the first fixed frame 21c. The front side of the second pressure plate 42 is slidably and rotatably connected to the second fixed frame 22a, the rear side of the second pressure plate 42 is slidably and rotatably connected to the second fixed frame 22b, and the middle portion of the second pressure plate 42 is slidably and rotatably connected to the second fixed frame 22c. There are four first pressure plate swing arms 43 and four second pressure plate swing arms 44. One end of each first pressure plate swing arm 43 is rotatably connected to the limiting base 10, and the other end is slidably connected to the first pressure plate 41. Along the Y-axis direction, the four first pressure plate swing arms 43 are spaced apart from each other. One end of each second pressing plate swing arm 44 is rotatably connected to the limiting base 10 , and the other end is slidably connected to the second pressing plate 42 .

[0131] In some other embodiments, there may be one, two or more first pressure plate swing arms 43, and / or there may be one, two or more second pressure plate swing arms 44. This application does not impose any specific limitation on the number of first pressure plate swing arms 43 and second pressure plate swing arms 44.

[0132] See also Figure 7 , Figure 7 yes Figure 6 The structure diagram of the limiting base 10 and the damping assembly 30 in the foldable mechanism 130 is shown. Figure 7 A first damping assembly 30 a and a second damping assembly 30 b are shown, and a portion of the first damping assembly 30 a and a portion of the second damping assembly 30 b are both installed on the limiting base 10 .

[0133] The limiting base 10 includes a first portion 10a, a second portion 10b and a third portion 10c. The first portion 10a, the third portion 10c and the second portion 10b are arranged in sequence along the Y-axis direction, and the third portion 10c is connected between the first portion 10a and the second portion 10b. The first portion 10a is located at the front side of the limiting base 10 and can be connected to the first connecting component 20a (such as Figure 6 and Figure 7 The second portion 10b is located at the rear side of the limiting base 10 and can be connected to the second connecting component 20b (as shown) and the first damping component 30a. Figure 6 and Figure 7 The third portion 10c is located in the middle of the limiting base 10 and can be connected to the third connecting component 20c (as shown) and the second damping component 30b. Figure 6 and Figure 7 shown) mating connection.

[0134] It should be noted that the first part 10a and the second part 10b can be the same or similar components, symmetrical or partially symmetrical structures, or different structures. For example, the first part 10a and the second part 10b can be centrally symmetrical to improve the symmetry of the limit base 10, simplify the overall structure of the limit base 10, improve the structural stability of the limit base 10, and reduce the processing cost of the limit base 10. Among them, the basic structure of each component in the second part 10b, the connection relationship between the components, and the connection relationship between the components and components outside the assembly can all refer to the relevant design of the first part 10a. The second part 10b and the first part 10a may be different in the detailed structure or position arrangement of the components.

[0135] In one embodiment, the limiting base 10 is an integral structural member formed by assembly. The limiting base 10 includes a main base and a plurality of sub-bases (not shown), and the plurality of sub-bases are mounted on the main base. Specifically, the main base extends along the Y-axis direction, and the plurality of sub-bases are arranged in sequence along the Y-axis direction. Exemplarily, the plurality of sub-bases can be mounted on the main base by fasteners such as screws, pins or screws. In some other embodiments, the limiting base 10 can also be an integrally formed structural member to improve the overall strength of the limiting base 10 and ensure the structural stability of the limiting base 10.

[0136] See also Figure 7 and Figure 8 , Figure 8 yes Figure 7 The schematic diagram of the partial structure of the first part 10a of the limiting base 10 is shown. Figure 8 Only shown Figure 7 The first portion 10a of the limiting base 10 shown is a portion away from the third portion 10c.

[0137] The first portion 10a of the limiting base 10 is provided with a first sliding groove 101a, a second sliding groove 102a, a first rotation groove 103a, and a second rotation groove 104a. The first sliding groove 101a and the first rotation groove 103a are located on the left side of the limiting base 10 and are spaced apart from each other along the Y-axis. The first rotation groove 103a is located on the side of the first sliding groove 101a facing the negative direction of the Y-axis. The second sliding groove 102a and the second rotation groove 104a are located on the right side of the limiting base 10 and are spaced apart from each other along the Y-axis. The second rotation groove 104a is located on the side of the second sliding groove 102a facing the positive direction of the Y-axis. Along the X-axis, the first sliding groove 101a and the second rotation groove 104a are spaced apart and arranged opposite each other, and the second sliding groove 102a and the first rotation groove 103a are spaced apart and arranged opposite each other. The first sliding groove 101a and the second sliding groove 102a are both arc-shaped grooves.

[0138] The first portion 10a of the limiting base 10 is provided with a first boss 11a, a second boss 12a, and a third boss 13a. The first boss 11a, the second boss 12a, and the third boss 13a are all provided on the top surface of the limiting base 10 and extend from the top surface of the limiting base 10 along the positive direction of the Z axis. The first boss 11a, the second boss 12a, and the third boss 13a are all located on the left side of the limiting base 10 and are arranged in sequence along the negative direction of the Y axis. Among them, the second boss 12a is located between the first boss 11a and the third boss 13a. Specifically, the first boss 11a and the second boss 12a are located on opposite sides of the first sliding groove 101a, and the second boss 12a and the third boss 13a are located on opposite sides of the first rotating groove 103a.

[0139] The first boss 11a is provided with a first slider 111a, and the first slider 111a is provided on the rear side surface of the first boss 11a. The rear side surface of the first boss 11a is the side surface of the first boss 11a facing the negative direction of the Y-axis. The first slider 111a extends from the rear side surface of the first boss 11a along the negative direction of the Y-axis and is located on the top side of the first sliding groove 101a. The first slider 111a is in the shape of an arc-shaped plate and is recessed in the negative direction of the Z-axis. The axis of the first slider 111a is parallel to the Y-axis. That is, the top and bottom surfaces of the first slider 111a are both arc-shaped surfaces and are both recessed in the negative direction of the Z-axis.

[0140] The second boss 12a is provided with a second slider 121a, and the second slider 121a is provided on the front side of the second boss 12a. The second slider 121a extends from the front side of the second boss 12a along the positive direction of the Y axis and is located on the top side of the first sliding groove 101a. Along the Y axis direction, the second slider 121a is spaced apart from the first slider 111a. The second slider 121a is in the shape of an arc-shaped plate and is recessed in the negative direction of the Z axis. The second slider 121a is coaxial with the first slider 111a. That is, the top and bottom surfaces of the second slider 121a are both arc-shaped surfaces and are recessed in the negative direction of the Z axis. The top surface of the second slider 121a is coaxial with the top surface of the first slider 111a, and the bottom surface of the second slider 121a is coaxial with the bottom surface of the first slider 111a.

[0141] It should be noted that the "coaxial" mentioned in the embodiments of this application means that the extension lines of the axes coincide with each other. For example, A and B are coaxial, which means that the extension line of the axis of A coincides with the extension line of the axis of B. The following description of "coaxial" should be understood in the same way.

[0142] The second boss 12a is also provided with a first mounting hole (not marked in the figure), and the opening of the first mounting hole is located on the rear side surface of the second boss 12a. The first mounting hole is recessed from the rear side surface of the second boss 12a along the positive direction of the Y-axis and is connected to the first rotation groove 103a. The first mounting hole is a circular hole. The axis of the first mounting hole is parallel to the Y-axis direction. Exemplarily, the rear side surface of the second boss 12a is flush with the side wall of the first rotation groove 103a. In some other embodiments, the opening of the first mounting hole may be partially located on the rear side surface of the second boss 12a and partially located on the side wall of the first rotation groove 103a, or the opening of the first mounting hole may be located on the side wall of the first rotation groove 103a.

[0143] The third boss 13a is provided with a second mounting hole (not shown), and the opening of the second mounting hole is located on the front side of the third boss 13a. The second mounting hole is recessed from the front side of the third boss 13a along the negative direction of the Y-axis and is connected to the first rotation groove 103a. The second mounting hole is a circular hole. The second mounting hole is coaxial with the first mounting hole. Exemplarily, the front side of the third boss 13a is flush with the side wall of the first rotation groove 103a. In some other embodiments, the opening of the second mounting hole may be partially located on the front side of the third boss 13a and partially located on the side wall of the first rotation groove 103a, or the opening of the second mounting hole may be located on the side wall of the first rotation groove 103a.

[0144] The third boss 13a also has a third mounting hole (not shown), the opening of which is located on the rear side of the third boss 13a. The third mounting hole is recessed from the rear side of the third boss 13a along the positive direction of the Y-axis. The third mounting hole is a circular hole. The axis of the third mounting hole is parallel to the Y-axis and parallel to the axis of the second mounting hole, and spaced apart. Exemplarily, the axis of the third mounting hole is located on top of the axis of the second mounting hole.

[0145] The first portion 10a of the position limiting base 10 is further provided with a fourth boss 14a, a fifth boss 15a, a sixth boss 16a, and a seventh boss 17a. The fourth boss 14a, the fifth boss 15a, the sixth boss 16a, and the seventh boss 17a are all located on the top surface of the position limiting base 10. Specifically, the fourth boss 14a, the fifth boss 15a, the sixth boss 16a, and the seventh boss 17a all extend from the top surface of the position limiting base 10 in the Z-axis direction. The fourth boss 14a, the fifth boss 15a, the sixth boss 16a, and the seventh boss 17a are all located on the right side of the position limiting base 10 and are spaced apart in sequence along the negative Y-axis direction. Specifically, the fifth boss 15a is located between the fourth boss 14a and the sixth boss 16a, and the sixth boss 16a is located between the fifth boss 15a and the seventh boss 17a. The fourth boss 14a and the fifth boss 15a are respectively located on two opposite sides of the second rotation groove 104a, and the sixth boss 16a and the seventh boss 17a are respectively located on two opposite sides of the second sliding groove 102a.

[0146] The fourth boss 14a is provided with a fourth mounting hole (not marked in the figure), and the opening of the fourth mounting hole is located on the rear side of the fourth boss 14a. The fourth mounting hole is recessed from the rear side of the fourth boss 14a along the positive direction of the Y-axis and is connected to the second rotation groove 104a. Among them, the fourth mounting hole is a circular hole. The axis of the fourth mounting hole is parallel to the axis of the first mounting hole and is arranged at intervals. Exemplarily, the rear side of the fourth boss 14a is flush with the groove side wall of the second rotation groove 104a. In some other embodiments, the opening of the fourth mounting hole may be partially located on the rear side of the fourth boss 14a and partially located on the groove side wall of the second rotation groove 104a, or the opening of the fourth mounting hole is located on the groove side wall of the second rotation groove 104a.

[0147] The fifth boss 15a is provided with a fifth mounting hole (not shown), and the opening of the fifth mounting hole is located on the front side of the fifth boss 15a. The fifth mounting hole is recessed from the front side of the fifth boss 15a along the negative direction of the Y-axis and is connected to the second rotation groove 104a. The fifth mounting hole is a circular hole. The fifth mounting hole is coaxial with the fourth mounting hole. Exemplarily, the front side of the fifth boss 15a is flush with the side wall of the second rotation groove 104a. In some other embodiments, the opening of the fifth mounting hole may be partially located on the front side of the fifth boss 15a and partially located on the side wall of the second rotation groove 104a, or the opening of the fifth mounting hole is located on the side wall of the second rotation groove 104a.

[0148] The sixth boss 16a is provided with a third slider 161a, which is located on the rear side of the sixth boss 16a. The third slider 161a extends from the rear side of the sixth boss 16a in the negative Y-axis direction and is located on the top side of the second sliding groove 102a. The third slider 161a is in the shape of an arcuate plate and is recessed in the negative Z-axis direction. The axis of the third slider 161a is parallel to the axis of the first slider 111a and is spaced apart. In other words, the top and bottom surfaces of the third slider 161a are both arcuate and recessed in the negative Z-axis direction.

[0149] The seventh boss 17a is provided with a fourth slider 171a, which is disposed on the front side of the seventh boss 17a. The fourth slider 171a extends from the front side of the seventh boss 17a along the positive direction of the Y axis and is located on the top side of the second sliding groove 102a. Along the Y axis, the fourth slider 171a is spaced apart from the third slider 161a. The fourth slider 171a is in the shape of an arc-shaped plate and is recessed along the negative direction of the Z axis. The fourth slider 171a is coaxial with the third slider 161a. That is, the top and bottom surfaces of the fourth slider 171a are both arc-shaped surfaces and are recessed in the negative direction of the Z axis. The top surface of the fourth slider 171a is coaxial with the top surface of the third slider 161a, and the bottom surface of the fourth slider 171a is coaxial with the top surface of the third slider 161a.

[0150] The seventh boss 17a is also provided with a sixth mounting hole (not marked in the figure), and the opening of the sixth mounting hole is located on the rear side of the seventh boss 17a. The sixth mounting hole is recessed from the rear side of the seventh boss 17a along the positive direction of the Y-axis and passes through the front side of the seventh boss 17a. That is, the sixth mounting hole passes through the seventh boss 17a along the Y-axis direction. Among them, the sixth mounting hole is a circular hole. The axis of the sixth mounting hole is parallel to the Y-axis direction, and is parallel to the axis of the third mounting hole and the axis of the fifth mounting hole and is spaced apart. Exemplarily, the axis of the sixth mounting hole is located to the right of the axis of the third mounting hole and on the top side of the axis of the fifth mounting hole.

[0151] In addition, the foldable mechanism 130 also includes a first rotating shaft 51a and a second rotating shaft 52a, both of which are mounted on the first portion 10a of the position-limiting base 10. Specifically, one end of the first rotating shaft 51a is mounted in the first mounting hole and fixedly connected to the wall of the first mounting hole, while the other end is mounted in the second mounting hole and fixedly connected to the wall of the second mounting hole. One end of the second rotating shaft 52a is mounted in the fourth mounting hole and fixedly connected to the wall of the fourth mounting hole, while the other end is mounted in the fifth mounting hole and fixedly connected to the wall of the fifth mounting hole.

[0152] The first rotating shaft 51a and the second rotating shaft 52a are both circular shafts. For example, the first rotating shaft 51a is coaxial with both the first and second mounting holes. That is, the axis A1 of the first rotating shaft 51a coincides with both the axis of the first and second mounting holes. The second rotating shaft 52a is coaxial with both the fourth and fifth mounting holes. That is, the axis A2 of the second rotating shaft 52a coincides with both the axis of the fourth and fifth mounting holes.

[0153] In this embodiment, the first portion 10a of the position limiting base 10 further comprises an eighth boss 18a, a ninth boss 19a, a first auxiliary boss 10d, and a second auxiliary boss 10e. The eighth boss 18a, the ninth boss 19a, the first auxiliary boss 10d, and the second auxiliary boss 10e are all disposed on the top surface of the position limiting base 10. Specifically, the eighth boss 18a, the ninth boss 19a, the first auxiliary boss 10d, and the second auxiliary boss 10e all extend from the top surface of the position limiting base 10 along the Z-axis direction.

[0154] Specifically, the eighth boss 18a and the first auxiliary boss 10d are located on the left side of the limiting base 10. The eighth boss 18a is located on the side of the third boss 13a away from the second boss 12a, and is spaced apart from the third boss 13a. The first auxiliary boss 10d is located between the third boss 13a and the eighth boss 18a, and is spaced apart from the third boss 13a and the eighth boss 18a. The ninth boss 19a and the second auxiliary boss 10e are located on the right side of the limiting base 10. The ninth boss 19a is located on the side of the seventh boss 17a away from the sixth boss 16a, and is spaced apart from the seventh boss 17a. The second auxiliary boss 10e is located between the seventh boss 17a and the ninth boss 19a, and is spaced apart from both the seventh boss 17a and the ninth boss 19a.

[0155] The eighth boss 18a is provided with a seventh mounting hole (not shown). The opening of the seventh mounting hole is located on the front side of the eighth boss 18a. The seventh mounting hole is recessed from the front side of the eighth boss 18a along the negative Y-axis direction. The seventh mounting hole is a circular hole and is coaxial with the third mounting hole.

[0156] The first auxiliary boss 10d is provided with a first through-hole (not shown). The opening of the first through-hole is located on the front side of the first auxiliary boss 10d. The first through-hole is recessed from the front side of the first auxiliary boss 10d along the negative Y-axis direction and extends through the rear side of the first auxiliary boss 10d. In other words, the first through-hole extends through the first auxiliary boss 10d along the Y-axis. The first through-hole is circular and coaxial with the seventh and third mounting holes.

[0157] The ninth boss is provided with an eighth mounting hole (not shown). The opening of the eighth mounting hole is located on the front side of the ninth boss 19a. The eighth mounting hole is recessed from the front side of the ninth boss 19a along the negative Y-axis direction. The eighth mounting hole is a circular hole and is coaxial with the sixth mounting hole.

[0158] The second auxiliary boss 10e is provided with a second through-hole (not shown). The opening of the second through-hole is located on the front side of the second auxiliary boss 10e. The second through-hole is recessed from the front side of the second auxiliary boss 10e along the negative Y-axis direction and extends through the rear side of the second auxiliary boss 10e. In other words, the second through-hole extends through the second auxiliary boss 10e along the Y-axis. The second through-hole is circular and coaxial with the eighth and sixth mounting holes.

[0159] In addition, the foldable mechanism 130 also includes a third rotating shaft 53a and a fourth rotating shaft 54a. Both the third rotating shaft 53a and the fourth rotating shaft 54a are mounted on the first portion 10a of the position-limiting base 10. Specifically, the third rotating shaft 53a is disposed through the first through-hole. One end of the third rotating shaft 53a is mounted on the third mounting hole and fixedly connected to the wall of the third mounting hole, while the other end is mounted on the seventh mounting hole and fixedly connected to the wall of the seventh mounting hole. The fourth rotating shaft 54a is disposed through the second through-hole. One end of the fourth rotating shaft 54a is mounted on the sixth mounting hole and fixedly connected to the wall of the sixth mounting hole, while the other end is mounted on the eighth mounting hole and fixedly connected to the wall of the eighth mounting hole. Both the third rotating shaft 53a and the fourth rotating shaft 54a are circular shafts. For example, the third rotating shaft 53a is coaxial with the first through-hole, the seventh mounting hole, and the third mounting hole, and the fourth rotating shaft 54a is coaxial with the second through-hole, the eighth mounting hole, and the sixth mounting hole.

[0160] See also Figure 7 、 Figure 8 and Figure 9 , Figure 9 yes Figure 7 The schematic diagram of the partial structure of the second part 10b of the limiting base 10 is shown. Figure 9 Only shown Figure 7 The second portion 10b of the limiting base 10 shown is a portion away from the third portion 10c.

[0161] The second portion 10b of the limiting base 10 is provided with a first sliding groove 101b, a second sliding groove 102b, a first rotation groove 103b, and a second rotation groove 104b. The first sliding groove 101b and the first rotation groove 103b are located on the left side of the limiting base 10 and are spaced apart from each other along the Y-axis. The first rotation groove 103b is located on the side of the first sliding groove 101b facing the negative direction of the Y-axis. The second sliding groove 102b and the second rotation groove 104b are located on the right side of the limiting base 10 and are spaced apart from each other along the Y-axis. The second rotation groove 104b is located on the side of the second sliding groove 102b facing the positive direction of the Y-axis. Along the X-axis, the first sliding groove 101b and the second rotation groove 104b are spaced apart and arranged opposite each other, and the first rotation groove 103b and the first rotation groove 103b are spaced apart and arranged opposite each other. The first sliding groove 101b and the second sliding groove 102b are both arc-shaped grooves. It should be noted that the structure of the second portion 10b of the limiting base 10 may refer to the relevant description of the structure of the first portion 10a.

[0162] The second part 10b of the limiting base 10 is provided with a first boss 11b, a second boss 12b and a third boss 13b. The first boss 11b, the second boss 12b and the third boss 13b are all provided on the top surface of the limiting base 10, and all extend from the top surface of the limiting base 10 along the Z-axis direction. The first boss 11b, the second boss 12b and the third boss 13b are all located on the left side of the limiting base 10, and are arranged in sequence along the negative direction of the Y-axis. Among them, the second boss 12b is located between the first boss 11b and the third boss 13b. Specifically, the first boss 11b and the second boss 12b are located on opposite sides of the first sliding groove 101b, and the second boss 12b and the third boss 13b are located on opposite sides of the first rotating groove 103b.

[0163] The first boss 11b is provided with a first slider 111b, which is located on the top side of the first sliding groove 101b. The first slider 111b is an arc-shaped plate and is recessed in the negative direction of the Z axis. The axis of the first slider 111b is parallel to the Y axis. The structure of the first slider 111b in the first boss 11b is substantially the same as the structure of the first slider 111a in the first boss 11a, and will not be repeated here. For example, the first slider 111b in the first boss 11b is coaxial with the first slider 111a in the first boss 11a.

[0164] The second boss 12b is provided with a second slider 121b, which is located on the top side of the first sliding groove 101b. Along the Y-axis, the second slider 121b is spaced apart from the first slider 111b. The second slider 121b is in the shape of an arc-shaped plate and is concave in the negative Z-axis direction. The second slider 121b is coaxial with the first slider 111b. The structure of the second slider 121b in the second boss 12b is substantially identical to that of the second slider 121a in the second boss 12a and will not be further described here.

[0165] The second boss 12b also has a first mounting hole (not shown), which communicates with the first rotation groove 103b. The first mounting hole is circular. The axis of the first mounting hole is parallel to the Y-axis. The structure of the first mounting hole in the second boss 12b is substantially the same as that of the first mounting hole in the first boss 11a and will not be further described here. For example, the first mounting hole in the second boss 12b is coaxial with the first mounting hole in the first boss 11a.

[0166] The third boss 13b is provided with a second mounting hole (not shown), which communicates with the first rotation slot 103b. The second mounting hole is circular and coaxial with the first mounting hole. The structure of the second mounting hole in the third boss 13b is substantially identical to that of the second mounting hole in the third boss 13a and will not be further described here.

[0167] In addition, the first boss 11b is further provided with a third mounting hole (not shown), the opening of which is located on the front side of the first boss 11b. The third mounting hole extends from the rear side of the first boss 11b along the negative direction of the Y-axis. The third mounting hole is a circular hole, and the axis of the third mounting hole is parallel to the Y-axis. The structure of the third mounting hole in the first boss 11b is substantially the same as that of the third mounting hole in the third boss 13a, and will not be further described here. For example, the third mounting hole in the first boss 11b is coaxial with the third mounting hole in the third boss 13a.

[0168] The second portion 10b of the limiting base 10 is further provided with a fourth boss 14b, a fifth boss 15b, and a sixth boss 16b. The fourth boss 14b, the fifth boss 15b, and the sixth boss 16b are all provided on the top surface of the limiting base 10. The fourth boss 14b, the fifth boss 15b, and the sixth boss 16b all extend from the top surface of the limiting base 10 along the Z-axis direction. The fourth boss 14b, the fifth boss 15b, and the sixth boss 16b are all located on the right side of the limiting base 10 and are arranged in sequence along the negative direction of the Y-axis. Specifically, the fifth boss 15b is located between the fourth boss 14b and the sixth boss 16b. The fourth boss 14b and the fifth boss 15b are respectively located on opposite sides of the second rotating groove 104b, and the fifth boss 15b and the sixth boss 16b are respectively located on opposite sides of the second sliding groove 102b.

[0169] The fourth boss 14b is provided with a fourth mounting hole (not shown), which communicates with the second rotation slot 104b. The fourth mounting hole is circular. The axis of the fourth mounting hole is parallel to the axis of the first mounting hole and spaced apart. The structure of the fourth mounting hole in the fourth boss 14b is substantially identical to that of the fourth mounting hole in the fourth boss 14a and will not be further described here. For example, the fourth mounting hole in the fourth boss 14b is coaxial with the fourth mounting hole in the fourth boss 14a.

[0170] The fifth boss 15b is provided with a fifth mounting hole (not shown), which communicates with the second rotation slot 104b. The fifth mounting hole is circular and coaxial with the fourth mounting hole. The structure of the fifth mounting hole in the fifth boss 15b is substantially identical to that of the fifth boss 15a and will not be further described here.

[0171] The fifth boss 15b is provided with a third slider 151b, which is located on the top side of the second sliding groove 102b. The third slider 151b is in the shape of an arc-shaped plate and is recessed in the negative direction of the Z axis. The axis of the third slider 151b is parallel to the axis of the first slider 111b and is spaced apart. The structure of the third slider 151b in the fifth boss 15b is substantially the same as the structure of the third slider 161a in the sixth boss 16a, and will not be repeated here. For example, the third slider 151b in the fifth boss 15b and the third slider 161a in the sixth boss 16a are coaxial.

[0172] The sixth boss 16b is provided with a fourth slider 161b, which is located on the top side of the second sliding groove 102b. Along the Y-axis, the fourth slider 161b is spaced apart from the third slider 151b. The fourth slider 161b is in the shape of an arc-shaped plate and is recessed along the negative Z-axis. The fourth slider 161b is coaxial with the third slider 151b. The structure of the fourth slider 161b in the sixth boss 16b is substantially identical to that of the fourth slider 171a in the seventh boss 17a and will not be further described here.

[0173] In addition, the fourth boss 14b is further provided with a sixth mounting hole (not marked in the figure), and the opening of the sixth mounting hole is located on the front side of the fourth boss 14b. The sixth mounting hole is recessed from the front side of the fourth boss 14b along the negative direction of the Y-axis and passes through the rear side of the fourth boss 14b. That is, the sixth mounting hole passes through the fourth boss 14b along the Y-axis direction. The sixth mounting hole is a circular hole. The axis of the sixth mounting hole is parallel to the Y-axis direction, and is parallel to the axis of the third mounting hole and the axis of the fourth mounting hole and is spaced apart. Exemplarily, the axis of the sixth mounting hole is located to the right of the axis of the third mounting hole and is located on the top side of the axis of the fourth mounting hole.

[0174] The structure of the sixth mounting hole in the fourth boss 14b is substantially the same as that of the sixth mounting hole in the seventh boss 17a, and will not be described in detail herein.

[0175] In addition, the foldable mechanism 130 also includes a first rotating shaft 51b and a second rotating shaft 52b, both of which are mounted on the second portion 10b of the position-limiting base 10. Specifically, one end of the first rotating shaft 51b is mounted in the first mounting hole and fixedly connected to the wall of the first mounting hole, while the other end is mounted in the second mounting hole and fixedly connected to the wall of the second mounting hole. One end of the second rotating shaft 52b is mounted in the fourth mounting hole and fixedly connected to the wall of the fourth mounting hole, while the other end is mounted in the fifth mounting hole and fixedly connected to the wall of the fifth mounting hole.

[0176] The first rotating axis 51b and the second rotating axis 52b are both circular axes. For example, the first rotating axis 51b is coaxial with the first mounting hole and the second mounting hole. That is, the axis B1 of the first rotating axis 51b coincides with the axis of the first mounting hole and the axis of the second mounting hole. The second rotating axis 52b is coaxial with the fourth mounting hole and the fifth mounting hole. That is, the axis B2 of the second rotating axis 52b coincides with the axis of the fourth mounting hole and the axis of the fifth mounting hole. In this case, the first rotating axis 51b is coaxial with the first rotating axis 51a, and the first rotating axis 51b is coaxial with the second rotating axis 52a. That is, the axis B1 of the first rotating axis 51b coincides with the axis A1 of the first rotating axis 51a, and the axis B2 of the second rotating axis 52b coincides with the axis A2 of the second rotating axis 52a.

[0177] In this embodiment, the second portion 10b of the position limiting base 10 further comprises a seventh boss 17b, an eighth boss 18b, a first auxiliary boss 10f, and a second auxiliary boss 10g. The seventh boss 17b, the eighth boss 18b, the first auxiliary boss 10f, and the second auxiliary boss 10g are all disposed on the top surface of the position limiting base 10. Specifically, the seventh boss 17b, the eighth boss 18b, the first auxiliary boss 10f, and the second auxiliary boss 10g all extend from the top surface of the position limiting base 10 along the Z-axis direction.

[0178] Specifically, the seventh boss 17b and the first auxiliary boss 10f are located on the left side of the limiting base 10. The seventh boss 17b is located on the side of the first boss 11b away from the second boss 12b, and is spaced apart from the first boss 11b. The first auxiliary boss 10f is located between the first boss 11b and the seventh boss 17b, and is spaced apart from the first boss 11b and the seventh boss 17b. The eighth boss 18b and the second auxiliary boss 10g are located on the right side of the limiting base 10. The eighth boss 18b is located on the side of the fourth boss 14b away from the fifth boss 15b, and is spaced apart from the fourth boss 14b. The second auxiliary boss 10g is located between the fourth boss 14b and the eighth boss 18b, and is spaced apart from both the fourth boss 14b and the eighth boss 18b.

[0179] The seventh boss 17b is provided with a seventh mounting hole (not shown). The opening of the seventh mounting hole is located on the rear side of the seventh boss 17b. The seventh mounting hole is recessed from the rear side of the seventh boss 17b along the positive direction of the Y axis. The seventh mounting hole is a circular hole and is coaxial with the third mounting hole.

[0180] The first auxiliary boss 10f is provided with a first through-hole (not shown). The opening of the first through-hole is located on the front side of the first auxiliary boss 10f. The first through-hole is recessed from the front side of the first auxiliary boss 10f along the negative Y-axis direction and extends through the rear side of the first auxiliary boss 10f. In other words, the first through-hole extends through the first auxiliary boss 10f along the Y-axis. The first through-hole is circular and coaxial with the seventh mounting hole and the third mounting hole.

[0181] The ninth boss is provided with an eighth mounting hole (not shown). The opening of the eighth mounting hole is located on the rear side of the eighth boss 18b. The eighth mounting hole is recessed from the front side of the eighth boss 18b along the negative Y-axis direction. The eighth mounting hole is a circular hole and coaxial with the sixth mounting hole.

[0182] The second auxiliary boss 10g is provided with a second through-hole (not shown). The opening of the second through-hole is located on the front side of the second auxiliary boss 10g. The second through-hole is recessed from the front side of the second auxiliary boss 10g along the negative Y-axis direction and extends through the rear side of the second auxiliary boss 10g. In other words, the second through-hole extends through the second auxiliary boss 10g along the Y-axis. The second through-hole is circular and coaxial with the eighth and sixth mounting holes.

[0183] In addition, the foldable mechanism 130 also includes a third rotating shaft 53b and a fourth rotating shaft 54b, both of which are mounted on the second portion 10b of the position-limiting base 10. Specifically, the third rotating shaft 53b is disposed through the first through-hole. One end of the third rotating shaft 53b is mounted on the third mounting hole and fixedly connected to the wall of the third mounting hole, while the other end is mounted on the seventh mounting hole and fixedly connected to the wall of the seventh mounting hole. The fourth rotating shaft 54b is disposed through the second through-hole. One end of the fourth rotating shaft 54b is mounted on the sixth mounting hole and fixedly connected to the wall of the sixth mounting hole, while the other end is mounted on the eighth mounting hole and fixedly connected to the wall of the eighth mounting hole. Both the third rotating shaft 53b and the fourth rotating shaft 54b are circular shafts. Exemplarily, the third rotating shaft 53b is coaxial with the first through-hole, the seventh mounting hole, and the third mounting hole, and the fourth rotating shaft 54b is coaxial with the second through-hole, the eighth mounting hole, and the sixth mounting hole.

[0184] See also Figure 7 、 Figure 8 and Figure 10 , Figure 10 yes Figure 7A schematic structural diagram of the third portion 10c of the limiting base 10 is shown.

[0185] The third portion 10c of the position limiting base 10 is provided with a first sliding groove 101c and a second sliding groove 102c. The first sliding groove 101c is located on the left side of the position limiting base 10, and the second sliding groove 102c is located on the right side of the position limiting base 10. Both the first sliding groove 101c and the second sliding groove 102c are arc-shaped grooves. It should be noted that the structure of the third portion 10c of the position limiting base 10 can be referred to the description of the structure of the first portion 10a.

[0186] The third portion 10c of the position-limiting base 10 is provided with a first boss 11c, a second boss 12c, a third boss 13c, and a fourth boss 14c. The first boss 11c, the second boss 12c, the third boss 13c, and the fourth boss 14c are all located on the top surface of the position-limiting base 10 and extend from the top surface of the position-limiting base 10 in the Z-axis direction. The first boss 11c and the second boss 12c are located on the left side of the position-limiting base 10, on opposite sides of the first sliding groove 101c. The third boss 13c and the fourth boss 14c are located on the right side of the position-limiting base 10, on opposite sides of the second sliding groove 102c.

[0187] The first boss 11c is provided with a first slider 111c, which is located on the top side of the first sliding groove 101c. The first slider 111c is an arc-shaped plate and is recessed in the negative direction of the Z axis. The axis of the first slider 111c is parallel to the Y axis. The structure of the first slider 111c in the first boss 11c is substantially the same as the structure of the first slider 111a in the first boss 11a, and will not be repeated here. For example, the first slider 111c in the first boss 11c is coaxial with the first slider 111a in the first boss 11a.

[0188] The second boss 12c is provided with a second slider 121c, which is located on the top side of the first sliding groove 101c. Along the Y-axis, the second slider 121c is spaced apart from the first slider 111c. The second slider 121c is in the shape of an arc-shaped plate and is recessed in the negative Z-axis direction. The second slider 121c is coaxial with the first slider 111c. The structure of the second slider 121c in the second boss 12c is substantially identical to that of the second slider 121a in the second boss 12a and will not be further described here.

[0189] The third boss 13c is provided with a third slider 131c, which is located on the top side of the second sliding groove 102c. The third slider 131c is in the shape of an arc plate and is recessed in the negative direction of the Z axis. The axis of the third slider 131c is parallel to the axis of the first slider 111c and is spaced apart. The structure of the third slider 131c in the third boss 13c is substantially the same as the structure of the third slider 161a in the sixth boss 16a, and will not be repeated here. For example, the third slider 131c in the third boss 13c is coaxial with the third slider 161a in the sixth boss 16a.

[0190] The fourth boss 14c is provided with a fourth slider 141c, which is located on the top side of the second sliding groove 102c. Along the Y-axis, the fourth slider 141c is spaced apart from the third slider 131c. The fourth slider 141c is in the shape of an arc-shaped plate and is recessed along the negative Z-axis. The fourth slider 141c is coaxial with the third slider 131c. The structure of the fourth slider 141c in the fourth boss 14c is substantially identical to that of the fourth slider 171a in the seventh boss 17a and will not be further described here.

[0191] In this embodiment, the third portion 10c of the position limiting base 10 further comprises a fifth boss 15c, a sixth boss 16c, a seventh boss 17c, an eighth boss 18c, a ninth boss 19c, a tenth boss 10h, an eleventh boss 10i, and a twelfth boss 10j. The fifth boss 15c, the sixth boss 16c, the seventh boss 17c, the eighth boss 18c, the ninth boss 19c, the tenth boss 10h, the eleventh boss 10i, and the twelfth boss 10j are all disposed on the top surface of the position limiting base 10 and extend from the top surface of the position limiting base 10 along the positive direction of the Z axis.

[0192] The fifth, sixth, seventh, and eighth bosses 15c, 16c, 17c, and 18c are all located on the left side of the position limiting base 10 and are spaced apart in sequence along the negative Y-axis direction. The fifth and sixth bosses 15c, 16c are located on the side of the first boss 11c facing away from the second boss 12c and are spaced apart from the first boss 11c. The sixth boss 16c is located between the first and fifth bosses 11c, 15c. The seventh and eighth bosses 17c, 18c are located on the side of the second boss 12c facing away from the first boss 11c and are spaced apart from the second boss 12c. The seventh boss 17c is located between the second and eighth bosses 12c.

[0193] The ninth boss 19c, the tenth boss 10h, the eleventh boss 10i, and the twelfth boss 10j are all located on the right side of the limiting base 10 and are spaced apart in sequence along the negative direction of the Y-axis. The ninth boss 19c and the tenth boss 10h are located on the side of the third boss 13c facing away from the fourth boss 14c and are spaced apart from the third boss 13c. The tenth boss 10h is located between the third boss 13c and the ninth boss 19c. The eleventh boss 10i and the twelfth boss 10j are located on the side of the fourth boss 14c facing away from the third boss 13c and are spaced apart from the fourth boss 14c. The eleventh boss 10i is located between the fourth boss 14c and the twelfth boss 10j.

[0194] The fifth boss 15c is provided with a first mounting hole (not shown), the opening of which is located on the rear side of the fifth boss 15c. The first mounting hole extends from the rear side of the fifth boss 15c in the positive direction of the Y-axis. The first mounting hole is a circular hole, with its axis parallel to the Y-axis. The structure of the first mounting hole in the fifth boss 15c is substantially identical to the third mounting hole in the third boss 13a, and will not be further described here. For example, the first mounting hole in the fifth boss 15c is coaxial with the third mounting hole in the third boss 13a.

[0195] The sixth boss 16c is provided with a second mounting hole (not shown). The opening of the second mounting hole is located on the front side of the sixth boss 16c. The second mounting hole extends from the front side of the sixth boss 16c in the negative Y-axis direction and passes through the rear side of the sixth boss 16c. In other words, the second mounting hole passes through the sixth boss 16c along the Y-axis. The second mounting hole is a circular hole and is coaxial with the first mounting hole.

[0196] The seventh boss 17c is provided with a third mounting hole (not shown), the opening of which is located on the rear side of the seventh boss 17c. The third mounting hole extends from the rear side of the seventh boss 17c in the positive direction of the Y-axis. The third mounting hole is a circular hole, with its axis parallel to the Y-axis. The structure of the third mounting hole in the seventh boss 17c is substantially identical to the first mounting hole in the fifth boss 15c and will not be further described here. For example, the third mounting hole in the seventh boss 17c is coaxial with the first mounting hole in the fifth boss 15c.

[0197] The eighth boss 18c is provided with a fourth mounting hole (not shown). The opening of the fourth mounting hole is located on the front side of the eighth boss 18c. The fourth mounting hole extends from the front side of the eighth boss 18c in the negative Y-axis direction and passes through the rear side of the eighth boss 18c. In other words, the fourth mounting hole passes through the eighth boss 18c along the Y-axis. The fourth mounting hole is a circular hole and is coaxial with the third mounting hole.

[0198] The ninth boss 19c is provided with a fifth mounting hole (not shown), the opening of which is located on the rear side of the ninth boss 19c. The fifth mounting hole extends from the rear side of the ninth boss 19c in the positive direction of the Y-axis. The fifth mounting hole is a circular hole, with its axis parallel to the Y-axis and parallel to the axis of the first mounting hole, and spaced apart. The structure of the fifth mounting hole in the ninth boss 19c is substantially identical to that of the sixth mounting hole in the seventh boss 17a, and will not be further described here. For example, the fifth mounting hole in the ninth boss 19c is coaxial with the sixth mounting hole in the seventh boss 17a.

[0199] The tenth boss 10h is provided with a sixth mounting hole (not shown), the opening of which is located on the front side of the tenth boss 10h. The sixth mounting hole extends from the front side of the tenth boss 10h in the negative Y-axis direction and passes through the rear side of the tenth boss 10h. In other words, the sixth mounting hole passes through the tenth boss 10h along the Y-axis. The sixth mounting hole is a circular hole and is coaxial with the fifth mounting hole.

[0200] The eleventh boss 10i is provided with a seventh mounting hole (not shown), the opening of which is located on the rear side of the eleventh boss 10i. The seventh mounting hole extends from the rear side of the eleventh boss 10i in the positive direction of the Y-axis. The seventh mounting hole is a circular hole, with its axis parallel to the Y-axis. The structure of the seventh mounting hole in the eleventh boss 10i is substantially identical to that of the fifth mounting hole in the ninth boss 19c, and will not be further described here. For example, the seventh mounting hole in the eleventh boss 10i is coaxial with the fifth mounting hole in the ninth boss 19c.

[0201] The twelfth boss 10j is provided with an eighth mounting hole (not shown), the opening of which is located on the front side of the twelfth boss 10j. The eighth mounting hole extends from the front side of the twelfth boss 10j in the negative Y-axis direction and passes through the rear side of the twelfth boss 10j. In other words, the eighth mounting hole passes through the twelfth boss 10j along the Y-axis. The eighth mounting hole is a circular hole, coaxial with the seventh mounting hole.

[0202] Furthermore, the third portion 10c of the position limiting base 10 is further provided with a first auxiliary boss 10k, a second auxiliary boss 10l, a third auxiliary boss 10m, and a fourth auxiliary boss 10n. The first auxiliary boss 10k, the second auxiliary boss 10l, the third auxiliary boss 10m, and the fourth auxiliary boss 10n are all provided on the top surface of the position limiting base 10 and extend from the top surface of the position limiting base 10 along the positive direction of the Z axis.

[0203] The first auxiliary boss 10k and the second auxiliary boss 10l are both located on the left side of the limiting base 10 and are spaced apart in sequence along the negative direction of the Y-axis. Specifically, the first auxiliary boss 10k is located between the fifth boss 15c and the sixth boss 16c, and is spaced apart from both the fifth boss 15c and the sixth boss 16c. The first auxiliary boss 10k is provided with a first through hole (not shown) that extends through the first auxiliary boss 10k along the Y-axis. The first through hole is a circular hole. The first through hole is coaxial with the first mounting hole and the second mounting hole.

[0204] Second auxiliary boss 101 is located between seventh boss 17c and eighth boss 18c, and is spaced apart from both bosses 17c and 18c. Second auxiliary boss 101 is provided with a second through-hole (not shown) extending through second auxiliary boss 101 along the Y-axis. The second through-hole is circular and coaxial with the third and fourth mounting holes.

[0205] The third auxiliary boss 10m and the fourth auxiliary boss 10n are both located on the right side of the limiting base 10 and are spaced apart in sequence along the negative direction of the Y-axis. Specifically, the third auxiliary boss 10m is located between the ninth boss 19c and the tenth boss 10h, and is spaced apart from both the ninth boss 19c and the tenth boss 10h. The third auxiliary boss 10m is provided with a third through hole (not labeled in the figure), which extends through the third auxiliary boss 10m along the Y-axis. The third through hole is a circular hole and is coaxial with the fifth and sixth mounting holes.

[0206] The fourth auxiliary boss 10n is located between the eleventh boss 10i and the twelfth boss 10j, and is spaced apart from both the eleventh boss 10i and the twelfth boss 10j. A fourth through hole (not shown) is defined on the fourth auxiliary boss 10n, extending along the Y-axis. The fourth through hole is circular and coaxial with the seventh and eighth mounting holes.

[0207] In addition, the foldable mechanism 130 also includes a first rotating shaft 51c, a second rotating shaft 52c, a third rotating shaft 53c, and a fourth rotating shaft 54c. The first rotating shaft 51c, the second rotating shaft 52c, the third rotating shaft 53c, and the fourth rotating shaft 54c are all mounted on the third portion 10c of the limiting base 10. Specifically, the first rotating shaft 51c is disposed through the first through hole. One end of the first rotating shaft 51c is mounted on the first mounting hole and fixedly connected to the hole wall of the first mounting hole, and the other end is mounted on the second mounting hole and fixedly connected to the hole wall of the second mounting hole. The second rotating shaft 52c is disposed through the second through hole. One end of the second rotating shaft 52c is mounted on the third mounting hole and fixedly connected to the hole wall of the third mounting hole, and the other end is mounted on the fourth mounting hole and fixedly connected to the hole wall of the fourth mounting hole.

[0208] The first rotation axis 51c and the second rotation axis 52c are both circular axes. For example, the first rotation axis 51c is coaxial with the first through hole, the first mounting hole, and the second mounting hole, while the second rotation axis 52c is coaxial with the second through hole, the third mounting hole, and the fourth mounting hole. In this case, the first rotation axis 51c and the second rotation axis 52c, as well as the third rotation axis 53a and the third rotation axis 53b, are all coaxial.

[0209] The third rotational axis 53c is disposed through the third through-hole. One end of the third rotational axis 53c is mounted in the fifth mounting hole and fixedly connected to the wall of the fifth mounting hole, while the other end is mounted in the sixth mounting hole and fixedly connected to the wall of the sixth mounting hole. The fourth rotational axis 54c is disposed through the fourth through-hole. One end of the fourth rotational axis 54c is mounted in the seventh mounting hole and fixedly connected to the wall of the seventh mounting hole, while the other end is mounted in the eighth mounting hole and fixedly connected to the wall of the eighth mounting hole.

[0210] The third rotation axis 53c and the fourth rotation axis 54c are both circular axes. For example, the third rotation axis 53c is coaxial with the third through hole, the fifth mounting hole, and the sixth mounting hole, and the fourth rotation axis 54c is coaxial with the fourth through hole, the seventh mounting hole, and the eighth mounting hole. In this case, the third rotation axis 53c, the fourth rotation axis 54c, the fourth rotation axis 54a, and the fourth rotation axis 54b are all coaxial.

[0211] See also Figure 8 、 Figure 11 and Figure 12 , Figure 11 yes Figure 7 The schematic diagram of the partial structure of the first part 10a of the limiting base 10 and the first damping component 30a is shown. Figure 12 yes Figure 7 The front view of the limiting base 10 and the damping assembly 30 is shown. Figure 11 Only shown Figure 7 The portion of the first portion 10a of the limiting base 10 facing the third portion 10c is shown. Figure 12 Only the front side surface of the limiting base 10, the axis A1 of the first rotating shaft 51a, the axis A2 of the second rotating shaft 52a, the axis C1 of the first damping shaft 34a, and the axis C2 of the second damping shaft 35a are shown.

[0212] In this embodiment, the damping member 31a of the first damping assembly 30a is installed at a position where the first portion 10a faces the third portion 10c. In other embodiments, the damping member 31a of the first damping assembly 30a can also be installed at a position where the first portion 10a faces away from the third portion 10c.

[0213] The damping member 31a includes a first damping shaft 34a, a second damping shaft 35a, a first damping shaft sleeve 36a, a second damping shaft sleeve 37a, and a damping plate 38a. The first damping shaft 34a and the second damping shaft 35a are both mounted on the first portion 10a of the position limiting base 10 and are arranged parallel to and spaced apart from each other along the X-axis. Specifically, the first damping shaft 34a is mounted on the left side of the first portion 10a, and the second damping shaft 35a is mounted on the right side of the first portion 10a. The first damping shaft 34a is located between the third rotation axis 53a and the first rotation axis 51c, and is spaced apart from both the third rotation axis 53a and the first rotation axis 51c. The second damping shaft 35a is located between the fourth rotation axis 54a and the third rotation axis 53c, and is spaced apart from both the third rotation axis 53a and the first rotation axis 51c.

[0214] The first damping shaft 34a and the second damping shaft 35a are both circular shafts. The axis C1 of the first damping shaft 34a and the axis C2 of the second damping shaft 35a are both parallel to the Y-axis and spaced apart from the axis A1 of the first rotation axis 51a and the axis A2 of the second rotation axis 52a. Specifically, the axis C1 of the first damping shaft 34a and the axis C2 of the second damping shaft 35a are both located between the axis A1 of the first rotation axis 51a and the axis A2 of the second rotation axis 52a. The axis C1 of the first damping shaft 34a is close to the axis A1 of the first rotation axis 51a, and the axis C2 of the second damping shaft 35a is close to the axis A2 of the second rotation axis 52a.

[0215] The first damping sleeve 36a is sleeved onto the first damping shaft 34a and mounted on the first portion 10a of the position limiting base 10. In this embodiment, the front end surface of the first damping sleeve 36a is a hinged surface and includes multiple crests and troughs arranged alternately. The first damping sleeve 36a is cylindrical in shape. Exemplarily, the first damping sleeve 36a is coaxial with the first damping shaft 34a.

[0216] The first damping sleeve 36a can rotate relative to the first damping shaft 34a to generate a damping force. For example, a spring is disposed within the first damping sleeve 36a. When the first damping sleeve 36a rotates relative to the first damping shaft 34a, the spring deforms to generate a damping force. In this embodiment, there are two first damping sleeves 36a, each of which is sleeved on the first damping shaft 34a and spaced apart along the Y-axis. When folding or unfolding the foldable terminal 1000, the user can clearly feel the damping force generated by the rotation of the two first damping sleeves 36a relative to the first damping shaft 34a, providing a better hand feel and enhancing the user experience.

[0217] The second damping sleeve 37a is sleeved onto the second damping shaft 35a and mounted on the first portion 10a of the position limiting base 10. In this embodiment, the front end surface of the second damping sleeve 37a is a hinged surface and includes multiple crests and troughs, which are alternately arranged. The second damping sleeve 37a is cylindrical in shape. Exemplarily, the second damping sleeve 37a is coaxial with the second damping shaft 35a.

[0218] The second damping sleeve 37a can rotate relative to the second damping shaft 35a to generate a damping force. For example, a spring is disposed within the second damping sleeve 37a. When the second damping sleeve 37a rotates relative to the second damping shaft 35a, the spring deforms to generate a damping force. In this embodiment, there are two second damping sleeves 37a, each of which is sleeved on the second damping shaft 35a and spaced apart along the Y-axis. Along the X-axis, each second damping sleeve 37a is spaced apart from and disposed opposite to a first damping sleeve 36a. When folding or unfolding the foldable terminal 1000, the user can clearly feel the damping force generated by the rotation of the two second damping sleeves 37a relative to the second damping shaft 35a, providing a better hand feel and enhancing the user experience.

[0219] In some other embodiments, there may be one or more first damping sleeves 36a, and / or there may be one or more second damping sleeves 37a. The embodiment of the present application does not impose any specific limitation on the number of first damping sleeves 36a and second damping sleeves 37a.

[0220] The first damping swing arm 32a of the first damping assembly 30a is sleeved on the first damping shaft 34a and hinged to both first damping sleeves 36a. The second damping swing arm 33a of the first damping assembly 30a is sleeved on the second damping shaft 35a and hinged to both second damping sleeves 37a.

[0221] In this embodiment, the first damping swing arm 32a includes a rotating portion 321a, a sliding portion 322a, and a connecting portion 323a. The connecting portion 323a is connected between the rotating portion 321a and the sliding portion 322a. The rotating portion 321a includes two sub-rotating portions 324a, which are spaced apart along the Y-axis. The rear end surface of each sub-rotating portion 324a is a hinged surface, and the rear end surface of the sub-rotating portion 324a includes multiple peaks and troughs, which are arranged alternately.

[0222] Specifically, the two sub-rotating parts 324a are both sleeved on the first damping shaft 34a and are respectively hinged to the two first damping sleeves 36a. The hinge surface of each sub-rotating part 324a is hinged to the hinge surface of each first damping sleeve 36a. In this embodiment, the sub-rotating part 324a is cylindrical. The two sub-rotating parts 324a are coaxial with the first damping shaft 34a. The rotation center of the rotating part 321a of the first damping swing arm 32a relative to the damping member 31a is the second center. That is, the rotation center of the first damping swing arm 32a relative to the damping member 31a is the second center. At this time, the second center is the axis C1 of the first damping shaft 34a. That is, the first damping swing arm 32a can rotate around the axis C1 of the first damping shaft 34a.

[0223] The sliding portion 322a is generally planar and plate-shaped. The sliding portion 322a includes a main portion 325a and a rotating portion 326a, which is fixedly connected to the main portion 325a. The main portion 325a is connected between the connecting portion 323a and the rotating portion 326a. For example, the main portion 325a is planar and plate-shaped, and the rotating portion 326a is cylindrical.

[0224] The structure of the second damping swing arm 33a is substantially the same as that of the first damping swing arm 32a. The second damping swing arm 33a includes a rotating portion 331a, a sliding portion 332a, and a connecting portion 333a, wherein the connecting portion 333a is connected between the rotating portion 331a and the sliding portion 332a. The sliding portion 332a includes a main body 335a and a rotating portion 326a. The rotating portion 331a includes two sub-rotating portions 334a, which are arranged at intervals along the Y-axis. The rear end surface of each sub-rotating portion 334a is a hinged surface, and the rear end surface of the sub-rotating portion 324a includes multiple peaks and multiple troughs, which are arranged alternately.

[0225] Specifically, the two sub-rotating parts 334a are both sleeved on the second damping shaft 35a and are respectively hinged to the two second damping sleeves 37a. The hinge surface of each sub-rotating part 334a is hinged to the hinge surface of each second damping sleeve 37a. In this embodiment, the sub-rotating part 334a is cylindrical. The two sub-rotating parts 334a are coaxial with the second damping shaft 35a. The rotation center of the rotating part 331a of the second damping swing arm 33a relative to the damping member 31a is the fourth center. That is, the rotation center of the second damping swing arm 33a relative to the damping member 31a is the fourth center. At this time, the fourth center is the axis C2 of the second damping shaft 35a. That is, the second damping swing arm 33a can rotate around the axis C2 of the second damping shaft 35a.

[0226] In some other embodiments, the rotating portion 321a of the first damping swing arm 32a may also include one or more sub-rotating portions 324a, and / or the rotating portion 331a of the second damping swing arm 33a may also include one or more sub-rotating portions 334a. The embodiment of the present application does not impose any specific restriction on the number of sub-rotating portions 324a of the rotating portion 321a and the sub-rotating portions 334a of the rotating portion 331a.

[0227] When the first damping assembly 30a changes from the folded state to the flattened state, the folding mechanism 130 (eg Figure 5 When the terminal 1000 is folded into the flat state (as shown in FIG. Figure 2 (As shown in the figure), when the folded state is flattened, the peak of the rear end surface of the sub-rotating portion 324a in the first damping arm 32a enters the trough of the front end surface of the first damping sleeve 36a. At the same time, the peak of the front end surface of the first damping sleeve 36a also enters the trough of the rear end surface of the sub-rotating portion 324a. In the second damping arm 33a, the peak of the rear end surface of the sub-rotating portion 334a enters the trough of the front end surface of the second damping sleeve 37a. The peak of the front end surface of the second damping sleeve 37a also enters the trough of the rear end surface of the sub-rotating portion 334a. At this time, the damping force generated by the rotation of the first damping arm 32a relative to the first damping shaft 34a is relatively small, and the damping force generated by the rotation of the second damping arm 33a relative to the second damping shaft 35a is relatively small, allowing users to experience the feeling of the foldable terminal 1000 being fully flattened.

[0228] Similarly, when the first damping assembly 30a enters the folded state from the flattened state, that is, when the foldable mechanism 130 enters the folded state from the flattened state, that is, when the foldable terminal 1000 enters the folded state from the flattened state, in the first damping swing arm 32a, the peak of the rear end surface of the sub-rotating portion 324a will enter the trough of the front end surface of the first damping sleeve 36a, and at the same time, the peak of the front end surface of the first damping sleeve 36a will also enter the trough of the rear end surface of the sub-rotating portion 324a. In the second damping swing arm 33a, the peak of the rear end surface of the sub-rotating portion 334a will enter the trough of the front end surface of the second damping sleeve 37a, and the peak of the front end surface of the second damping sleeve 37a will enter the trough of the rear end surface of the sub-rotating portion 334a. At this time, the damping force generated by the first damping swing arm 32a rotating relative to the first damping shaft 34a is small, and the damping force generated by the second damping swing arm 33a rotating relative to the second damping shaft 35a is small, which allows users to experience the feel of the foldable terminal 1000 being folded into place.

[0229] The damping sheet 38a is sleeved around the first damping shaft 34a and the second damping shaft 35a. It is located on the side of the first damping sleeve 36a and the second damping sleeve 37a away from the third portion 10c and spaced apart from the first damping sleeve 36a and the second damping sleeve 37a. In this embodiment, multiple damping sheets 38a are provided, arranged sequentially along the Y-axis. When the first damping swing arm 32a and the second damping swing arm 33a rotate relative to the damping member 31a, the damping sheet 38a generates a damping force. When the user folds or unfolds the foldable terminal 1000, the user can clearly feel the damping force generated by the damping sheet 38a, providing a better feel and enhancing the user experience.

[0230] See also Figure 9 、 Figure 13 and Figure 14 , Figure 13 yes Figure 7 The schematic diagram of the partial structure of the second part 10b of the limiting base 10 and the second damping component 30b is shown. Figure 14 yes Figure 7 The rear view of the limiting base 10 and the damping assembly 30 is shown. Figure 11 Only shown Figure 7 The portion of the second portion 10b of the limiting base 10 facing the third portion 10c is shown. Figure 14 Only the rear side surface of the limiting base 10, the axis B1 of the first rotating shaft 51b, the axis B2 of the second rotating shaft 52b, the axis D1 of the first damping shaft 34b, and the axis D2 of the second damping shaft 35b are shown.

[0231] In this embodiment, the damping member 31b of the first damping assembly 30a is installed at a position where the second portion 10b faces the third portion 10c. In other embodiments, the damping member 31b of the first damping assembly 30a can also be installed at a position where the second portion 10b faces away from the third portion 10c.

[0232] The damping member 31b includes a first damping shaft 34b, a second damping shaft 35b, a first damping sleeve 36b, a second damping sleeve 37b, and a damping plate 38b. Both the first damping shaft 34b and the second damping shaft 35b are mounted on the second portion 10b of the position limiting base 10 and are arranged parallel to and spaced apart from each other along the X-axis. The mating relationship between the first damping shaft 34b and the second damping shaft 35b and the second portion 10b can be found in the description of the first damping assembly 30a above and will not be repeated here.

[0233] The first damping shaft 34b and the second damping shaft 35b are both circular shafts. The axis D1 of the first damping shaft 34b and the axis D2 of the second damping shaft 35b are both parallel to the Y-axis direction. For example, the first damping shaft 34b is coaxial with the first damping shaft 34a, and the second damping shaft 35b is coaxial with the second damping shaft 35a. That is, the axis D1 of the first damping shaft 34b is parallel to the axis A1 of the first damping shaft 34a (as shown in FIG. Figure 12 The axis D2 of the second damping shaft 35b coincides with the axis A2 of the second damping shaft 35a (as shown in FIG. Figure 12 shown) overlap.

[0234] The axis D1 of the first damping shaft 34b and the axis D2 of the second damping shaft 35b are both spaced apart from the axis A1 of the first rotating shaft 51a and the axis A2 of the second rotating shaft 52a. Specifically, the axis D1 of the first damping shaft 34b and the axis D2 of the second damping shaft 35b are both located between the axis B1 and the axis B2 of the second rotating shaft 52b. The axis D1 of the first damping shaft 34b is close to the axis B1 of the second rotating shaft 52b, while the axis D2 of the second damping shaft 35b is close to the axis B2 of the second rotating shaft 52b.

[0235] The first damping sleeve 36b is sleeved onto the first damping shaft 34b and mounted on the second portion 10b of the position limiting base 10. In this embodiment, the rear end surface of the first damping sleeve 36b is a hinged surface and includes multiple crests and troughs arranged alternately. The structure of the first damping sleeve 36b and the mating relationship between the first damping sleeve 36b and the first damping shaft 34b can be found in the description of the first damping assembly 30a above and will not be further elaborated here.

[0236] The second damping sleeve 37b is sleeved onto the second damping shaft 35b and mounted on the second portion 10b of the position limiting base 10. In this embodiment, the rear end surface of the second damping sleeve 37b is a hinged surface and includes multiple crests and troughs arranged alternately. The structure of the second damping sleeve 37b and the mating relationship between the second damping sleeve 37b and the second damping shaft 35b can be referred to above in the description of the first damping assembly 30a and will not be further elaborated here.

[0237] The damping plate 38b is sleeved on the first damping shaft 34b and the second damping shaft 35b, and is located on the side of the first damping sleeve 36b and the second damping sleeve 37b away from the third portion 10c, and is spaced apart from the first damping sleeve 36b and the second damping sleeve 37b. The structure of the damping plate 38b and the mating relationship between the damping plate 38b and the first damping shaft 34b and the second damping shaft 35b can be referred to above in the description of the first damping assembly 30a, and will not be repeated here.

[0238] The first damping swing arm 32b of the first damping assembly 30a is sleeved on the first damping shaft 34b and hinged to both first damping sleeves 36b. The second damping swing arm 33b of the first damping assembly 30a is sleeved on the second damping shaft 35b and hinged to both second damping sleeves 37b.

[0239] In this embodiment, the first damping swing arm 32b includes a rotating portion 321b, a sliding portion 322b, and a connecting portion 323b. The connecting portion 323b is connected between the rotating portion 321b and the sliding portion 322b. The sliding portion 322b includes a main portion 325b and a rotating portion 326b. The rotating portion 321b includes two sub-rotating portions 324b, which are spaced apart along the Y-axis. The front end surface of each sub-rotating portion 324b is a hinged surface, and the front end surface of the sub-rotating portion 324b includes multiple peaks and troughs, which are arranged alternately.

[0240] The structure of the second damping swing arm 33b is substantially the same as that of the first damping swing arm 32b. The second damping swing arm 33b includes a rotating portion 331b, a sliding portion 332b, and a connecting portion 333b, wherein the connecting portion 333b is connected between the rotating portion 331b and the sliding portion 332b. The sliding portion 332b includes a main body 335b and a rotating portion 326b. The rotating portion 331b includes two sub-rotating portions 334b, which are arranged at intervals along the Y-axis direction. The front end surface of each sub-rotating portion 334b ​​is a hinged surface, and the front end surface of the sub-rotating portion 324b includes multiple peaks and multiple troughs, which are arranged alternately.

[0241] The mating relationship between the first damping swing arm 32b and the first damping shaft 34b, as well as the mating relationship between the second damping swing arm 33b and the second damping shaft 35b, can be referred to above in the description of the first damping assembly 30a and will not be repeated here. The rotation center of the first damping swing arm 32b relative to the damping member 31b is the second center, and the rotation center of the second damping swing arm 33b relative to the damping member 31b is the fourth center. In this case, the second center is the axis D1 of the first damping shaft 34b, and the fourth center is the axis D2 of the second damping shaft 35b. That is, the first damping swing arm 32b can rotate about the axis D1 of the first damping shaft 34b, and the second damping swing arm 33b can rotate about the axis D2 of the second damping shaft 35b.

[0242] See also Figure 11 and Figure 13 In this embodiment, the foldable mechanism 130 further includes a synchronization assembly 50, which is mounted on the limiting base 10. There are two synchronization assemblies 50, which are spaced apart from each other along the Y-axis. The two synchronization assemblies 50 are respectively a first synchronization assembly 50a and a second synchronization assembly 50b. The first synchronization assembly 50a is mounted on the first damping assembly 30a to achieve synchronous rotation between the first damping swing arm 32a and the second damping swing arm 33a. The second synchronization assembly 50b is mounted on the second damping assembly 30b to achieve synchronous rotation between the first damping swing arm 32b and the second damping swing arm 33b.

[0243] In this embodiment, the first synchronization assembly 50a includes multiple gears (not shown) arranged sequentially along the X-axis. One gear is sleeved on the first damping shaft 34a and located between the damping plate 38a and the first damping sleeve 36a. Another gear is sleeved on the second damping shaft 35a and located between the damping plate 38a and the second damping sleeve 37a. Adjacent gears mesh with each other to achieve transmission, thereby achieving synchronous rotation between the first damping swing arm 32a and the second damping swing arm 33a.

[0244] It should be noted that the second synchronization component 50b and the first synchronization component 50a can be identical or similar components, symmetrical or partially symmetrical structures, or different structures. Specifically, the second synchronization component 50b can be mirror-symmetrical to the first synchronization component 50a. The basic structure of each component in the second synchronization component 50b, the connection relationship between components, and the connection relationship between components and components outside the assembly can all refer to the relevant design of the first synchronization component 50a. The second synchronization component 50b and the first synchronization component 50a may differ in the detailed structure or position arrangement of the components.

[0245] In this embodiment, the second synchronization assembly 50b includes multiple gears (not shown), which are arranged in sequence along the X-axis. One gear is sleeved on the first damping shaft 34b and located between the damping plate 38a and the first damping sleeve 36b. One gear is sleeved on the second damping shaft 35b and located between the damping plate 38b and the second damping sleeve 37b. Adjacent gears in the multiple gears mesh with each other to achieve transmission, thereby achieving synchronous rotation between the first damping swing arm 32a and the second damping swing arm 33a. The structure of each component of the second synchronization assembly 50b and the connection relationship between each component and the limiting base 10, the second connecting assembly 20b and the pressure plate assembly 40 can refer to the relevant description of the first synchronization assembly 50a.

[0246] See also Figure 8 、 Figure 15 and Figure 16 , Figure 15 yes Figure 6 The schematic structural diagram of the first connecting component 20a in the foldable mechanism 130 is shown. Figure 16 yes Figure 15 The structure diagram of the first connecting component 20a shown is from another angle.

[0247] The first fixing frame 21a is provided with a receiving notch 211a, a mounting notch 212a, a first sliding hole 213a, a first avoidance groove 214a, a second sliding hole 215a, and a first guide groove 216a. The opening of the receiving notch 211a is located on the top surface of the first fixing frame 21a. The receiving notch 211a is recessed from the top surface to the bottom surface of the first fixing frame 21a (i.e., the negative direction of the Z axis in the figure), and passes through the front end face, rear end face, and right side face of the first fixing frame 21a. In some other embodiments, the receiving notch 211a may not pass through the front end face of the first fixing frame 21a, and / or the receiving notch 211a may not pass through the rear end face of the first fixing frame 21a, and / or the receiving notch 211a may not pass through the right side face of the first fixing frame 21a.

[0248] The opening of the mounting notch 212a is located on the right side of the first fixing frame 21a. The mounting notch 212a is recessed from the right side of the first fixing frame 21a toward the left side (in the negative x-axis direction as shown) and extends through the bottom surface of the first fixing frame 21a and the bottom wall of the slot receiving the notch 211a. In other embodiments, the mounting notch 212a may not extend through the bottom surface of the first fixing frame 21a.

[0249] The mounting notch 212a includes two opposing sidewalls and a bottom wall connected between the two sidewalls. Both sidewalls of the mounting notch 212a are recessed with mounting holes (not shown). One mounting hole is recessed from one sidewall of the mounting notch 212a along the positive Y-axis direction, and the other mounting hole is recessed from the other sidewall of the mounting notch 212a along the negative Y-axis direction. Both mounting holes are circular, and their axes are parallel to the Y-axis. Exemplarily, the two mounting holes are coaxial.

[0250] The bottom wall of the mounting notch 212a is provided with a mounting boss (not shown), which is spaced apart from both sidewalls of the mounting notch 212a. The mounting boss is provided with a through hole that extends through the mounting boss along the Y-axis. The through hole is circular, with its axis parallel to the Y-axis. For example, the through hole is coaxial with the two mounting holes. In other embodiments, the bottom wall of the mounting notch 212a may not be provided with a mounting boss.

[0251] In addition, the first connecting assembly 20a also includes a first pin (not shown), which is inserted into the through hole. One end of the first pin is mounted in one mounting hole and fixedly connected to the wall of the mounting hole, and the other end is mounted in the other mounting hole and fixedly connected to the wall of the mounting hole. The first pin is a circular shaft, and the axis of the first pin is parallel to the Y-axis. Exemplarily, the first pin is coaxial with the through hole and both mounting holes.

[0252] The first sliding hole 213a is located on one side of the mounting notch 212a along the negative Y-axis direction and is spaced apart from the mounting notch 212a. The opening of the first sliding hole 213a is located on the right side of the first fixing frame 21a. The first sliding hole 213a is recessed from the right side of the first fixing frame 21a toward the left side and extends through the left side of the first fixing frame 21a. For example, the first sliding hole 213a is a square hole. In other embodiments, the first sliding hole 213a may also be a round hole or a special-shaped hole.

[0253] The first avoidance groove 214a is located on the side of the first sliding hole 213a away from the mounting notch 212a and is spaced apart from the first sliding hole 213a. The opening of the first avoidance groove 214a is located on the right side of the first fixing frame 21a. The first avoidance groove 214a is recessed from the right side toward the left side of the first fixing frame 21a and passes through the left side, top surface, and bottom wall of the receiving notch 211a of the first fixing frame 21a. In other embodiments, the first avoidance groove 214a may not pass through the top surface of the first fixing frame 21a, and / or the first avoidance groove 214a may not pass through the bottom wall of the receiving notch 211a.

[0254] The second sliding hole 215a is located on the side of the first avoidance groove 214a away from the first sliding hole 213a and is spaced apart from the first avoidance groove 214a. The opening of the second sliding hole 215a is located on the right side of the first fixing frame 21a. The second sliding hole 215a is recessed from the right side of the first fixing frame 21a toward the left side and extends through the left side of the first fixing frame 21a. Exemplarily, the second sliding hole 215a is a square hole. In other embodiments, the second sliding hole 215a may also be a round hole or a special-shaped hole.

[0255] The opening of the first guide groove 216a is located at the bottom wall of the receiving notch 211a. The first guide groove 216a is recessed from the bottom wall of the receiving notch 211a toward the bottom surface of the first fixing frame 21a (in the negative direction of the Z axis as shown) and extends through the left side of the first fixing frame 21a. The first guide groove 216a is an arc-shaped groove. That is, the bottom wall of the first guide groove 216a is an arc-shaped surface. In other embodiments, the first guide groove 216a may not extend through the left side.

[0256] In this embodiment, there are two first guide grooves 216a. One first guide groove 216a is located on the side of the mounting notch 212a facing away from the first sliding hole 213a, is spaced apart from the mounting notch 212a, and also extends through the front end surface of the first fixing frame 21a. The other first guide groove 216a is located between the first avoidance groove 214a and the second sliding hole 215a, is spaced apart from both the first avoidance groove 214a and the second sliding hole 215a, and also extends through the top surface of the first fixing frame 21a. In other embodiments, the first guide groove 216a may not extend through the front end surface of the first fixing frame 21a, and / or the first guide groove 216a may not extend through the top surface of the first fixing frame 21a.

[0257] In this embodiment, the first main swing arm 23a includes a rotating portion 231a, a connecting portion 232a, and a sliding portion 233a. The connecting portion 232a is connected between the rotating portion 231a and the sliding portion 233a. The structure of the rotating portion 231a is compatible with the structure of the mounting notch 212a. The rotating portion 231a includes two sub-rotating portions 234a, which are spaced apart along the Y-axis. The two sub-rotating portions 234a can be mounted on the first pin and rotate relative to the first pin to achieve a rotational connection between the rotating portion 231a and the first pin, thereby achieving a rotational connection between the first main swing arm 23a and the first fixed frame 21a.

[0258] The connecting portion 232a is in the shape of a flat plate. The structure of the sliding portion 233a is compatible with the structure of the first sliding groove 101a. Specifically, the bottom surface of the sliding portion 233a is an arc-shaped surface. The sliding portion 233a is provided with a first slide groove 235a and a second slide groove 236a. The opening of the first slide groove 235a is located at the front end surface of the sliding portion 233a. The first slide groove 235a is recessed from the front end surface of the sliding portion 233a to the rear end surface (the negative direction of the Y axis in the figure). Exemplarily, the first slide groove 235a also passes through the top surface of the sliding portion 233a. Specifically, the first slide groove 235a is an arc-shaped groove compatible with the first slider 111a, and the axis of the first slide groove 235a is parallel to the Y axis direction.

[0259] The opening of the second slide groove 236a is located on the rear end of the sliding portion 233a. The second slide groove 236a is recessed from the rear end of the sliding portion 233a toward the front end (in the positive direction of the Y axis in the figure). Exemplarily, the second slide groove 236a also extends through the top surface of the sliding portion 233a. The second slide groove 236a is an arc-shaped groove that is compatible with the second slider 121a and is coaxial with the first slide groove 235a.

[0260] The first slider 111a can slide and rotate within the first sliding groove 235a, and the second slider 121a can slide and rotate within the second sliding groove 236a, thereby allowing the sliding portion 233a to slide and rotate within the first sliding groove 101a, thereby achieving a sliding and rotating connection between the first main swing arm 23a and the limiting base 10. At this time, the first sliding groove 235a and the first slider 111a are coaxial, and the second sliding groove 236a and the second slider 121a are coaxial.

[0261] In this embodiment, the first auxiliary swing arm 25a includes a rotating portion 251a, a connecting portion 252a, and a sliding portion 253a. The connecting portion 252a is connected between the rotating portion 251a and the sliding portion 253a. The sliding portion 253a is planar and plate-shaped. The structure of the sliding portion 253a is compatible with the structure of the first sliding hole 213a. The sliding portion 253a can be inserted into the first sliding hole 213a and can slide relative to the first fixed frame 21a within the first sliding hole 213a to achieve a sliding connection between the first auxiliary swing arm 25a and the first fixed frame 21a. The structure of the rotating portion 251a is compatible with the structure of the first rotating groove 103a. The rotating portion 251a can be mounted on the first rotating shaft 51a and can rotate relative to the first rotating shaft 51a to achieve a rotational connection between the first auxiliary swing arm 25a and the limiting base 10.

[0262] Among them, the rotation center of the rotating part 251a of the first auxiliary swing arm 25a relative to the limiting base 10 is the first center. That is, the rotation center of the first auxiliary swing arm 25a relative to the limiting base 10 is the first center. In this embodiment, the first center is the axis A1 of the first rotating shaft 51a. That is, the first auxiliary swing arm 25a can rotate around the axis A1 of the first rotating shaft 51a. The first center (axis A1 of the first rotating shaft 51a) and the second center (axis C1 of the first damping shaft 34a) are spaced from each other. Specifically, the first center is located outside the second center. That is, the second center is located inside the first center. That is, the second center is located on the side of the first center close to the center of the limiting base 10. In some other embodiments, the second center may also be located outside, on the top side, or on the bottom side of the first center, and this application does not impose specific restrictions on this.

[0263] The second fixing frame 22a is provided with a receiving notch 221a, a mounting notch 222a, a first sliding hole 223a, a second avoidance groove 224a, a second sliding hole 225a, and a second guide groove 226a. The structures of the receiving notch 221a, the mounting notch 222a, the first sliding hole 223a, the second avoidance groove 224a, the second sliding hole 225a, and the second guide groove 226a can be referred to the relevant description of the receiving notch 211a, the mounting notch 212a, the first sliding hole 213a, the first avoidance groove 214a, the second sliding hole 215a, and the first guide groove 216a in the first fixing frame 21a, and are not repeated here.

[0264] The receiving notch 221a opens on the top surface of the second fixing frame 22a. The receiving notch 221a also extends through the front, rear, and left sides of the second fixing frame 22a. The mounting notch 222a and the opening of the first sliding hole 223a are both located on the left side of the second fixing frame 22a. The mounting notch 222a is located on the side of the first sliding hole 223a facing the negative direction of the Y-axis and is spaced apart from the first sliding hole 223a.

[0265] The bottom wall of the groove of the mounting notch 222a is provided with a mounting boss. The first connecting assembly 20a also includes a second pin (not shown), which is inserted into the through hole of the mounting boss. One end of the second pin is mounted in one mounting hole and fixedly connected to the wall of the mounting hole, and the other end is mounted in the other mounting hole and fixedly connected to the wall of the mounting hole. The second pin is a circular shaft, parallel to the first pin and spaced apart. Exemplarily, the second pin is coaxial with the through hole and both mounting holes.

[0266] The second avoidance groove 224a is located on a side of the mounting notch 222a away from the first sliding hole 223a and is spaced apart from the mounting notch 222a. The second sliding hole 225a is located on a side of the second avoidance groove 224a away from the mounting notch 222a and is spaced apart from the second avoidance groove 224a. The opening of the second sliding hole 225a is located on the left side of the second fixing bracket 22a.

[0267] A second guide groove 226a extends through the right side of the second fixing bracket 22a. In this embodiment, there are two second guide grooves 226a. One second guide groove 226a is located on the side of the first sliding hole 223a facing away from the mounting notch 222a and is spaced apart from the first sliding hole 223a. The other second guide groove 226a is located between the second avoidance groove 224a and the second sliding hole 225a and is spaced apart from both the second avoidance groove 224a and the second sliding hole 225a.

[0268] In this embodiment, the structures of the second main swing arm 24a and the second auxiliary swing arm 26a can be referenced to the description of the first main swing arm 23a and the first auxiliary swing arm 25a, and will not be repeated here. The second main swing arm 24a includes a rotating portion 241a, a connecting portion 242a, and a sliding portion 243a. The connecting portion 242a is connected between the rotating portion 241a and the sliding portion 243a. The rotating portion 241a includes two sub-rotating portions 244a. The two sub-rotating portions 244a can be mounted on the second pin and rotate relative to the second pin to achieve a rotational connection between the rotating portion 241a and the second pin, thereby achieving a rotational connection between the second main swing arm 24a and the second fixed frame 22a.

[0269] The structure of the sliding portion 243a is compatible with that of the second sliding groove 102a. The bottom surface of the sliding portion 243a is an arcuate surface. The sliding portion 243a is provided with a third sliding groove 245a and a fourth sliding groove 246a. The third sliding groove 245a is an arcuate groove compatible with the third slider 161a, with its axis parallel to the Y-axis. The fourth sliding groove 246a is an arcuate groove compatible with the fourth slider 171a, and is coaxial with the third sliding groove 245a.

[0270] The third slider 161a can slide and rotate within the third sliding groove 245a, and the fourth slider 171a can slide and rotate within the fourth sliding groove 246a, thereby allowing the sliding portion 243a to slide and rotate within the second sliding groove 102a, thereby achieving a sliding and rotating connection between the second main swing arm 24a and the limiting base 10. At this time, the third sliding groove 245a and the third slider 161a are coaxial, and the fourth sliding groove 246a and the fourth slider 171a are coaxial.

[0271] In this embodiment, the second auxiliary swing arm 26a includes a rotating portion 261a, a connecting portion 262a, and a sliding portion 263a. The connecting portion 262a is connected between the rotating portion 261a and the sliding portion 263a. The structure of the sliding portion 263a is compatible with the structure of the first sliding hole 223a. The sliding portion 263a can be inserted into the first sliding hole 223a and can slide relative to the second fixed frame 22a within the first sliding hole 223 to achieve a sliding connection between the second auxiliary swing arm 26a and the second fixed frame 22a. The rotating portion 261a is compatible with the structure of the second rotating groove 104a. The rotating portion 261a can be mounted on the second rotating shaft 52a and can rotate relative to the second rotating shaft 52a to achieve a rotational connection between the second auxiliary swing arm 26a and the limiting base 10.

[0272] Among them, the rotation center of the rotating part 261a of the second auxiliary swing arm 26a relative to the limiting base 10 is the third center. That is, the rotation center of the second auxiliary swing arm 26a relative to the limiting base 10 is the third center. In this embodiment, the third center is the axis A2 of the second rotating shaft 52a. That is, the second auxiliary swing arm 26a can rotate around the axis A2 of the second rotating shaft 52a. The third center (axis A2 of the second rotating shaft 52a) and the fourth center (axis C2 of the second damping shaft 35a) are spaced from each other. Specifically, the third center is located on the outside of the fourth center. That is, the fourth center is located on the inside of the third center. That is, the fourth center is located on the side of the third center close to the first center. In some other embodiments, the fourth center may also be located on the outside, top side or bottom side of the third center, and this application does not impose specific restrictions on this.

[0273] Please also refer to Figure 11 and Figure 12 The sliding portion 322a of the first damping swing arm 32a can be inserted into the second sliding hole 215a of the first fixed frame 21a and can slide relative to the first fixed frame 21a within the second sliding hole 215a. Furthermore, the rotating portion 326a of the sliding portion 322a can rotate relative to the first fixed frame 21a within the second sliding hole 215a, thereby achieving a sliding and rotational connection between the first damping swing arm 32a and the first fixed frame 21a. The sliding portion 332a of the second damping swing arm 33a can be inserted into the second sliding hole 225a of the second fixed frame 22a and can slide relative to the second fixed frame 22a within the second sliding hole 225a. Furthermore, the rotating portion 336a of the sliding portion 332a can rotate relative to the second fixed frame 22a within the second sliding hole 225a, thereby achieving a sliding and rotational connection between the second damping swing arm 33a and the second fixed frame 22a.

[0274] When the first fixing frame 21a rotates relative to the limiting base 10, the first fixing frame 21a drives the first main swing arm 23a to rotate relative to the first fixing frame 21a, and to slide and rotate relative to the limiting base 10. It also drives the first auxiliary swing arm 25a to slide relative to the first fixing frame 21a and rotate relative to the limiting base 10. It also drives the first damping swing arm 32a to slide and rotate relative to the first fixing frame 21a and rotate relative to the damping member 31a. At this time, the first synchronizing assembly 50a can drive the second damping swing arm 33a to rotate relative to the damping member 31a, thereby driving the second damping swing arm 34 to slide and rotate relative to the second fixing frame 22a, and further driving the second fixing frame 22 to rotate relative to the limiting base 10, thereby achieving synchronous rotation of the first fixing frame 21a and the second fixing frame 22a relative to the limiting base 10.

[0275] Similarly, when the second fixing frame 22a rotates relative to the limiting base 10, the second fixing frame 22a drives the second main swing arm 24a to rotate relative to the second fixing frame 22a, slide and rotate relative to the limiting base 10, and drives the second auxiliary swing arm 26a to slide relative to the second fixing frame 22a and rotate relative to the limiting base 10. It also drives the second damping swing arm 32 to slide and rotate relative to the second fixing frame 22a and rotate relative to the damping member 31a. At this time, the first synchronizing assembly 50a can drive the first damping swing arm 32a to rotate relative to the damping member 31a, thereby driving the first damping swing arm 32a to slide and rotate relative to the first fixing frame 21a, and further driving the first fixing frame 21a to rotate relative to the limiting base 10, thereby achieving synchronized rotation of the first and second fixing frames 21a, 22a relative to the limiting base 10.

[0276] In this embodiment, when the first fixing frame 21a and the second fixing frame 22a rotate relative to the position-limiting base 10, the rotation center C1 of the first damping swing arm 32a does not coincide with the rotation center A1 of the first auxiliary swing arm 25a, and the rotation center C2 of the second damping swing arm 33a does not coincide with the rotation center A2 of the second auxiliary swing arm 26a. This increases the degree of freedom with which the first damping swing arm 32a and the second damping swing arm 33a can be assembled on the position-limiting base 10. Furthermore, the rotation centers C1 and C2 of the first damping swing arm 32a and 33a are both located between the rotation centers A1 and A2 of the first auxiliary swing arm 25a and the second auxiliary swing arm 26a, thereby reducing the size of the first damping assembly 30a along the X-axis, thereby reducing the size of the foldable mechanism 130 along the X-axis, and thereby reducing the size of the foldable terminal 1000 along the X-axis.

[0277] See also Figure 9 、 Figure 17 and Figure 18 , Figure 17 yes Figure 6 The schematic structural diagram of the second connecting component 20b in the foldable mechanism 130 is shown. Figure 18 yes Figure 17 The structure diagram of the second connecting component 20b shown is at another angle.

[0278] The first fixing frame 21b is provided with a receiving notch 211b, an installation notch 212b, a first sliding hole 213b, a first avoidance groove 214b, a second sliding hole 215b and a first guide groove 216b. The structures of the receiving notch 211b, the installation notch 212b, the first sliding hole 213b, the first avoidance groove 214b, the second sliding hole 215b and the first guide groove 216b can all refer to the receiving notch 211a, the installation notch 212a, the first sliding hole 213a, the first avoidance groove 214a, the second sliding hole 215a and the first guide groove 216a of the first fixing frame 21a in the first connecting assembly 20a (such as Figure 15 and Figure 16 The relevant description of FIG) is not repeated here.

[0279] The mounting notch 212b is located on the side of the first sliding hole 213b facing the positive direction of the Y-axis and is spaced apart from the first sliding hole 213b. The first avoidance groove 214b is located on the side of the mounting notch 212b facing away from the first sliding hole 213b and is spaced apart from the mounting notch 212b. The second sliding hole 215b is located on the side of the first avoidance groove 214b away from the mounting notch 212b and is spaced apart from the first avoidance groove 214b.

[0280] There are two first guide grooves 216b. One first guide groove 216b is located between the second sliding hole 215b and the first avoidance groove 214b, and is spaced apart from both the second sliding hole 215b and the first avoidance groove 214b. The other first guide groove 216b is located on the side of the first sliding hole 213b facing away from the mounting notch 212b, is spaced apart from the first sliding hole 213b, and also extends through the rear end surface of the first fixing bracket 21b.

[0281] In this embodiment, the structures of the first main swing arm 23b and the first auxiliary swing arm 25b can be referenced to the description of the first main swing arm 23a and the first auxiliary swing arm 25a in the first connecting assembly 20a and are not further described here. The first main swing arm 23b includes a rotating portion 231b, a connecting portion 232b, and a sliding portion 233b. The connecting portion 232b is connected between the rotating portion 231b and the sliding portion 233b. The rotating portion 231b includes two sub-rotating portions 234b. The two sub-rotating portions 234b are mounted on the first pin and can rotate relative to the first pin to achieve a rotational connection between the rotating portion 231b and the first pin, thereby achieving a rotational connection between the first main swing arm 23b and the first fixed frame 21a.

[0282] The structure of the sliding portion 233b matches that of the first sliding groove 101b. The sliding portion 233b is provided with a first sliding groove 235b and a second sliding groove 236b. The first slider 111b can slide and rotate within the first sliding groove 235b, while the second slider 121b can slide and rotate within the second sliding groove 236b. This allows the sliding portion 233b to slide and rotate within the first sliding groove 101b, thereby achieving a sliding and rotating connection between the first main swing arm 23b and the limiting base 10. The first sliding groove 235b is coaxial with the first slider 111b, while the second sliding groove 236b is coaxial with the second slider 121b.

[0283] The first auxiliary swing arm 25b includes a rotating portion 251b, a connecting portion 252b, and a sliding portion 253b. The connecting portion 252b is connected between the rotating portion 251b and the sliding portion 253b. The structure of the sliding portion 253b is compatible with the structure of the first sliding hole 213b. The sliding portion 253b can be inserted into the first sliding hole 213b and can slide relative to the first fixed frame 21b within the first sliding hole 213b to achieve a sliding connection between the first auxiliary swing arm 25b and the first fixed frame 21b. The rotating portion 251b is compatible with the structure of the first rotating groove 103b. The rotating portion 251b can be mounted on the first rotating shaft 51b and can rotate relative to the first rotating shaft 51b to achieve a rotational connection between the first auxiliary swing arm 25b and the limiting base 10.

[0284] Among them, the rotation center of the rotating part 251b of the first auxiliary swing arm 25b relative to the limiting base 10 is the first center. That is, the rotation center of the first auxiliary swing arm 25b relative to the limiting base 10 is the first center. In this embodiment, the first center is the axis B1 of the first rotating shaft 51b. That is, the first auxiliary swing arm 25b can rotate around the axis B1 of the first rotating shaft 51b. The first center (axis B1 of the first rotating shaft 51b) and the second center (axis C1 of the first damping shaft 34b) are spaced from each other. Specifically, the first center is located on the outside of the second center. That is, the second center is located on the inside of the first center. That is, the second center is located on the side of the first center close to the center of the limiting base 10.

[0285] The second fixing frame 22b is provided with a receiving notch 221b, an installation notch 222b, a first sliding hole 223b, a second avoidance groove 224b, a second sliding hole 225b and a second guide groove 226b. The structures of the receiving notch 221b, the installation notch 222b, the first sliding hole 223b, the second avoidance groove 224b, the second sliding hole 225b and the second guide groove 226b can all refer to the receiving notch 221a, the installation notch 222a, the first sliding hole 223a, the second avoidance groove 224a, the second sliding hole 225a and the second guide groove 226a of the second fixing frame 22a in the first connecting assembly 20a (such as Figure 15 and Figure 16The related description of FIG1 is shown in FIG1 and will not be repeated here.

[0286] The mounting notch 222b is located on the side of the first sliding hole 223b facing the negative direction of the Y-axis and is spaced apart from the first sliding hole 223b. The second avoidance groove 224b is located on the side of the first sliding hole 223b away from the mounting notch 222b and is spaced apart from the first sliding hole 223b. The second sliding hole 225b is located on the side of the second avoidance groove 224b away from the first sliding hole 223b and is spaced apart from the second avoidance groove 224b.

[0287] There are two second guide grooves 226b. One second guide groove 226b is located between the second avoidance groove 224b and the second slide hole 225b, and is spaced apart from both the second avoidance groove 224b and the second slide hole 225b. The other second guide groove 226b is located on the side of the mounting notch 222b facing away from the first slide hole 223b, is spaced apart from the mounting notch 222b, and also extends through the rear end surface of the second fixing bracket 22b.

[0288] In this embodiment, the structures of the second main swing arm 24b and the second auxiliary swing arm 26b can be referred to in the description of the second main swing arm 24a and the second auxiliary swing arm 26a in the first connecting assembly 20a, and are not further described here. The second main swing arm 24b includes a rotating portion 241b, a connecting portion 242b, and a sliding portion 243b. The connecting portion 242b is connected between the rotating portion 241b and the sliding portion 243b. The rotating portion 241b includes two sub-rotating portions 244b. The two sub-rotating portions 244b can be mounted on the second pin and rotate relative to the second pin to achieve a rotational connection between the rotating portion 241b and the second pin, thereby achieving a rotational connection between the second main swing arm 24b and the second fixed frame 22b.

[0289] The structure of the sliding portion 243b matches that of the second sliding groove 102b. The sliding portion 243b is provided with a third sliding groove 245b and a fourth sliding groove 246b. The third slider 151b can slide and rotate within the third sliding groove 245b, and the fourth slider 161b can slide and rotate within the fourth sliding groove 246b. This allows the sliding portion 243b to slide and rotate within the second sliding groove 102b, thereby achieving a sliding and rotating connection between the second main swing arm 24b and the limiting base 10. The third sliding groove 245b is coaxial with the third slider 151b, and the fourth sliding groove 246b is coaxial with the fourth slider 161b.

[0290] The second auxiliary swing arm 26b includes a rotating portion 261b, a connecting portion 262b, and a sliding portion 263b. The connecting portion 262b is connected between the rotating portion 261b and the sliding portion 263b. The structure of the sliding portion 263b is compatible with the structure of the first sliding hole 223b. The sliding portion 263b can be inserted into the first sliding hole 223b and can slide relative to the second fixed frame 22b within the first sliding hole 223b to achieve a sliding connection between the second auxiliary swing arm 26b and the second fixed frame 22b. The rotating portion 261b is compatible with the structure of the second rotating groove 104b. The rotating portion 261b can be mounted on the second rotating shaft 52b and can rotate relative to the second rotating shaft 52b to achieve a rotational connection between the second auxiliary swing arm 26b and the limiting base 10.

[0291] Among them, the rotation center of the rotating part 261b of the second auxiliary swing arm 26b relative to the limiting base 10 is the third center. That is, the rotation center of the second auxiliary swing arm 26b relative to the limiting base 10 is the third center. In this embodiment, the third center is the axis B2 of the second rotating shaft 52b. That is, the second auxiliary swing arm 26b can rotate around the axis B2 of the second rotating shaft 52b. The third center (axis B2 of the second rotating shaft 52b) and the fourth center (axis C2 of the second damping shaft 35b) are spaced from each other. Specifically, the third center is located on the outside of the fourth center. That is, the fourth center is located on the inside of the first center. That is, the second center is located on the side of the first center close to the center of the limiting base 10.

[0292] Please also refer to Figure 13 and Figure 14 The sliding portion 322b of the first damping swing arm 32b can be inserted into the second sliding hole 215b of the first fixed frame 21b and can slide relative to the first fixed frame 21b within the second sliding hole 215b. Furthermore, the rotating portion 326b of the sliding portion 322b can rotate relative to the first fixed frame 21b within the second sliding hole 215b, thereby achieving a sliding and rotational connection between the first damping swing arm 32b and the first fixed frame 21b. The sliding portion 332b of the second damping swing arm 33b can be inserted into the second sliding hole 225b of the second fixed frame 22b and can slide relative to the second fixed frame 22b within the second sliding hole 225b. Furthermore, the rotating portion 336b of the sliding portion 332b can rotate relative to the second fixed frame 22b within the second sliding hole 225b, thereby achieving a sliding and rotational connection between the second damping swing arm 33b and the second fixed frame 22b.

[0293] When the first fixing frame 21b and the second fixing frame 22b rotate relative to the limiting base 10, the first fixing frame 21b drives the first main swing arm 23b to rotate relative to the first fixing frame 21b, and to slide and rotate relative to the limiting base 10. It also drives the first auxiliary swing arm 25b to slide relative to the first fixing frame 21b and rotate relative to the limiting base 10. It also drives the first damping swing arm 32b to slide and rotate relative to the first fixing frame 21b and rotate relative to the damping member 31b. The second fixing frame 22b drives the second main swing arm 24b to rotate relative to the second fixing frame 22b, and to slide and rotate relative to the limiting base 10. It also drives the second auxiliary swing arm 26b to slide relative to the second fixing frame 22b and rotate relative to the limiting base 10. It also drives the second damping swing arm 32 to slide and rotate relative to the second fixing frame 22b and rotate relative to the damping member 31b.

[0294] At this time, the rotation center D1 of the first damping swing arm 32b does not coincide with the rotation center B1 of the first auxiliary swing arm 25b, and the rotation center D2 of the second damping swing arm 33b does not coincide with the rotation center B2 of the second auxiliary swing arm 26b. This increases the degree of freedom of assembly of the first and second damping swing arms 32b, 33b on the limiting base 10. Furthermore, the rotation centers D1, D2 of the first and second damping swing arms 32b, 33b are both located between the rotation centers B1, B2 of the first and second auxiliary swing arms 25b, 26b, respectively. This reduces the size of the second damping assembly 30b along the X-axis, facilitating a reduction in the size of the foldable mechanism 130 along the X-axis, and thereby reducing the size of the foldable terminal 1000 along the X-axis.

[0295] See also Figure 10 、 Figure 19 and Figure 20 , Figure 19 yes Figure 6 The schematic structural diagram of the third connecting component 20c in the foldable mechanism 130 is shown. Figure 20 yes Figure 19 The third connecting component 20c is shown as a schematic structural diagram at another angle.

[0296] The first fixing frame 21c is provided with a receiving notch 211c, an installation notch 212c and a first guide groove 213c. The structures of the receiving notch 211c, the installation notch 212c and the first guide groove 213c can all refer to the receiving notch 211a, the installation notch 212a and the first guide groove 216a of the first fixing frame 21a in the first connecting assembly 20a (such as Figure 15 and Figure 16 The related description of FIG1 is shown in FIG1 and will not be repeated here.

[0297] The mounting notch 212c is located in the middle of the first fixing bracket 21c. Two first guide grooves 213c are provided, one on opposite sides of the mounting notch 212c and spaced apart from the mounting notch 212c. One first guide groove 213c is located on the side of the mounting notch 212c facing the positive Y-axis direction and extends through the front end of the first fixing bracket 21c. The other first guide groove 213c is located on the side of the mounting notch 212c facing the negative Y-axis direction and extends through the rear end of the first fixing bracket 21c.

[0298] In this embodiment, the structure of the first main swing arm 23c can refer to the first main swing arm 23a in the first connecting assembly 20a (eg Figure 15 and Figure 16 The relevant description of the first main swing arm 23c is omitted here. The first main swing arm 23c includes a rotating portion 231c, a connecting portion 232c, and a sliding portion 233c. The connecting portion 232c is connected between the rotating portion 231c and the sliding portion 233c. The rotating portion 231c includes two sub-rotating portions 234c. The two sub-rotating portions 234c can be mounted on the first pin and rotate relative to the first pin to achieve a rotational connection between the rotating portion 231c and the first pin, thereby achieving a rotational connection between the first main swing arm 23c and the first fixed frame 21c.

[0299] The structure of the sliding portion 233c matches that of the first sliding groove 101c. The sliding portion 233c is provided with a first sliding groove 235c and a second sliding groove 236c. The first slider 111c can slide and rotate within the first sliding groove 235c, while the second slider 121c can slide and rotate within the second sliding groove 236c. This allows the sliding portion 233c to slide and rotate within the first sliding groove 101c, thereby achieving a sliding and rotating connection between the first main swing arm 23c and the limiting base 10. The first sliding groove 235c is coaxial with the first slider 111c, while the second sliding groove 236c is coaxial with the second slider 121c.

[0300] The second fixing frame 22c is provided with a receiving notch 221c, an installation notch 222c and a second guide groove 223c. The structures of the receiving notch 221c, the installation notch 222c and the second guide groove 223c can refer to the receiving notch 221a, the installation notch 222a and the second guide groove 226a of the second fixing frame 22a in the first connecting assembly 20a (such as Figure 15 and Figure 16 The related description of FIG1 is shown in FIG1 and will not be repeated here.

[0301] The mounting notch 222c is located in the middle of the second fixing bracket 22c. Two second guide grooves 223c are provided, one on opposite sides of the mounting notch 222c and spaced apart from the mounting notch 222c. One second guide groove 223c is located on the side of the mounting notch 222c facing the positive Y-axis direction and extends through the front end of the second fixing bracket 22c. The other second guide groove 223c is located on the side of the mounting notch 222c facing the negative Y-axis direction and extends through the rear end of the second fixing bracket 22c.

[0302] In this embodiment, the structure of the second main swing arm 24c can refer to the second main swing arm 24a in the first connecting assembly 20a (eg Figure 15 and Figure 16 The relevant description of the second main swing arm 24c is omitted here. The second main swing arm 24c includes a rotating portion 241c, a connecting portion 242c, and a sliding portion 243c. The connecting portion 242c is connected between the rotating portion 241c and the sliding portion 243c. The rotating portion 241c includes two sub-rotating portions 244c. These two sub-rotating portions 244c can be mounted on the second pin and rotate relative to the second pin to achieve a rotational connection between the rotating portion 241c and the second pin, thereby achieving a rotational connection between the second main swing arm 24c and the second fixed frame 22c.

[0303] The structure of the sliding portion 243c matches that of the second sliding groove 102c. The sliding portion 243c is provided with a third sliding groove 245c and a fourth sliding groove 246c. The third slider 131c can slide and rotate within the third sliding groove 245c, while the fourth slider 141c can slide and rotate within the fourth sliding groove 246c. This allows the sliding portion 243c to slide and rotate within the second sliding groove 102c, thereby achieving a sliding and rotating connection between the second main swing arm 24c and the limiting base 10. The third sliding groove 245c is coaxial with the third slider 131c, and the fourth sliding groove 246c is coaxial with the fourth slider 141c.

[0304] When the first fixing frame 21c and the second fixing frame 22c rotate relative to the limiting base 10, the first fixing frame 21c drives the first main swing arm 23c to rotate relative to the first fixing frame 21c, and slide and rotate relative to the limiting base 10. The second fixing frame 22c drives the second main swing arm 24c to rotate relative to the second fixing frame 22c, and slide and rotate relative to the limiting base 10, so as to realize the mutual switching of the third connecting component 20c between the folded state and the flattened state.

[0305] See also Figure 21 and Figure 22 , Figure 21 yes Figure 6 The schematic structural diagram of the first pressure plate 41 and the first pressure plate swing arm 43 of the pressure plate assembly 40 in the foldable mechanism 130 is shown. Figure 22 yes Figure 21 The structure diagram of the first pressing plate 41 and the first pressing plate swing arm 43 is shown at another angle.

[0306] The first pressing plate 41 extends along the Y-axis direction. The first pressing plate 41 is provided with a first guide hole 411, the opening of which is located on the right side of the first pressing plate 41. The first guide hole 411 is recessed from the right side of the first pressing plate 41 toward the left side (negative direction of the X-axis in the figure) and passes through the left side of the first pressing plate 41. Exemplarily, the first guide hole 411 is a square hole. In other embodiments, the first guide hole 411 may not pass through the left side of the first pressing plate 41.

[0307] In this embodiment, there are four first guide holes 411, and the four first guide holes 411 are arranged in sequence along the Y-axis. The four first guide holes 411 are respectively a first front guide hole 411a, a first rear guide hole 411b, and a first middle guide hole 411c, and there are two first middle guide holes 411c. The first front guide hole 411a is located on the front side of the first pressure plate 41, the first rear guide hole 411b is located on the rear side of the first pressure plate 41, and the two first middle guide holes 411c are located in the middle of the first pressure plate 41. In other embodiments, there may be one, two, three, or more first guide holes 411. This application does not impose any specific limitation on the number of first guide holes 411.

[0308] The first pressure plate 41 also includes a first guide slider 412, which is disposed on the bottom surface of the first pressure plate 41. The first guide slider 412 extends from the bottom surface of the first pressure plate 41 in a direction away from the top surface (in the negative direction of the Z axis as shown). The structure of the first guide slider 412 is compatible with the structure of the first guide groove 216a (first guide groove 216b or first guide groove 213c). The bottom surface of the first guide slider 412 is an arcuate surface.

[0309] In this embodiment, there are six first guide sliders 412, which are arranged in sequence along the Y-axis. The six first guide sliders 412 are two first front guide sliders 412a, two first rear guide sliders 412b, and two first middle guide sliders 412c. The two first front guide sliders 412a are located on the front side of the first pressure plate 41, on opposite sides of the first front guide hole 411a. The two first rear guide sliders 412b are located on the rear side of the first pressure plate 41, on opposite sides of the first rear guide hole 411b. The two first middle guide sliders 412c are located in the middle of the first pressure plate 41, between the two first middle guide holes 411c, and spaced apart from the first middle guide holes 411c. In other embodiments, the number of first guide sliders 412 may be less than five or more than seven. This application does not impose any specific limitation on the number of first guide holes 411.

[0310] In one embodiment, the first pressure plate 41 is an integrally formed structural member formed by assembly. The first pressure plate 41 includes a first support plate 413, four first auxiliary plates 414, and six first guide sliders 412. The four first auxiliary plates 414 and the six first guide sliders 412 are all mounted on the first support plate 413. The four first auxiliary plates 414 are fixedly connected to the bottom surface of the first support plate 413 and are spaced apart along the Y-axis. Each first auxiliary plate 414 and the first support plate 413 enclose a first guide hole 411. The six first guide sliders 412 are fixedly connected to the bottom surface of the first support plate 413 and are spaced apart along the Y-axis. Each first guide slider 412 forms a first guide slider 412. Exemplarily, the first support plate 413, the first auxiliary plates 414, and the first guide sliders 412 may be integrally formed to enhance the structural strength and ensure the stability of the first pressure plate 41. In some other embodiments, the first auxiliary plate 414 can be fixedly connected to the bottom surface of the first support plate 413 by welding or the like, and / or the first guide slider 412 can also be fixedly connected to the bottom surface of the first support plate 413 by welding or the like.

[0311] In this embodiment, the four first pressure plate swing arms 43 are respectively a first front pressure plate swing arm 43a, a first rear pressure plate swing arm 43b, and a first intermediate pressure plate swing arm 43c, and there are two first intermediate pressure plate swing arms 43c. In other embodiments, the number of first pressure plate swing arms 43 may be less than three or more than five. This application does not impose any specific limitation on the number of first pressure plate swing arms 43.

[0312] The first front pressure plate swing arm 43a includes a rotating portion 431a, a connecting portion 432a, and a sliding portion 433a. The connecting portion 432a is connected between the rotating portion 431a and the sliding portion 433a. The sliding portion 433a is flat and plate-shaped. The sliding portion 433a is adapted to the structure of the first front guide hole 411a. The sliding portion 433a can be inserted into the first front guide hole 411a and can slide relative to the first pressure plate 41 within the first front guide hole 411a, thereby achieving a sliding connection between the first front pressure plate swing arm 43a and the first pressure plate 41.

[0313] The rotating part 431a includes two sub-rotating parts (not shown), which are arranged at intervals along the Y-axis direction. The two sub-rotating parts can be sleeved on the third rotating shaft 53a (such as Figure 8 As shown), and can rotate relative to the third rotating shaft 53a to achieve a rotational connection between the first front pressure plate swing arm 43a and the limiting base 10.

[0314] The first rear pressure plate swing arm 43b has the same structure as the first front pressure plate swing arm 43a. The first rear pressure plate swing arm 43b includes a rotating portion 431b, a connecting portion 432b and a sliding portion 433b, and the connecting portion 432b is connected between the rotating portion 431b and the sliding portion 433b. The sliding portion 433b is adapted to the structure of the first rear guide hole 411b. The sliding portion 433b can be inserted into the first rear guide hole 411b, and can slide relative to the first pressure plate 41 in the first rear guide hole 411b to achieve a sliding connection between the first rear pressure plate swing arm 43b and the first pressure plate 41. The rotating portion 431b includes two sub-rotating portions (not marked in the figure), and the two sub-rotating portions can be sleeved on the third rotating shaft 53b (such as Figure 9 As shown), and can rotate relative to the third rotating shaft 53b to achieve a rotational connection between the first rear pressure plate swing arm 43b and the limiting base 10.

[0315] The first intermediate pressure plate swing arm 43c has the same structure as the first front pressure plate swing arm 43a. The first intermediate pressure plate swing arm 43c includes a rotating portion 431c, a connecting portion 432c and a sliding portion 433c, and the connecting portion 432c is connected between the rotating portion 431c and the sliding portion 433c. The sliding portion 433c is adapted to the structure of the first intermediate guide hole 411c. The sliding portion 433c of each first intermediate pressure plate swing arm 43c can be respectively passed through a first intermediate guide hole 411c, and can slide relative to the first pressure plate 41 in the first intermediate guide hole 411c to achieve a sliding connection between each first intermediate pressure plate swing arm 43c and the first pressure plate 41. The rotating portion 431c includes two sub-rotating portions (not marked in the figure). The two sub-rotating portions of a first intermediate pressure plate swing arm 43c can be sleeved on the first rotating shaft 51c (such as Figure 10 As shown), and can rotate relative to the first rotating shaft 51c, the two sub-rotating parts of the other first intermediate pressure plate swing arm 43c can be sleeved on the second rotating shaft 52c, and can rotate relative to the second rotating shaft 52c to realize the rotational connection between the two first intermediate pressure plate swing arms 43c and the limiting base 10.

[0316] Please also refer to Figure 15 、 Figure 17 and Figure 19 In this embodiment, the front side of the first support plate 413 can be received in the receiving notch 211a of the first fixing frame 21a, the rear side of the first support plate 413 can be received in the receiving notch 211b of the first fixing frame 21b, and the middle portion of the first support plate 413 can be received in the receiving notch 211c of the first fixing frame 21c. A first auxiliary plate 414 can be received in the first avoidance groove 214a of the first fixing frame 21a, and a first auxiliary plate 414 can be received in the first avoidance groove 214b of the first fixing frame 21b.

[0317] Each first front guide slider 412a can be mounted in a first guide slot 216a and can slide and rotate within the first guide slot 216a to achieve a sliding and rotational connection between the first pressure plate 41 and the first fixing frame 21a. Each first rear guide slider 412b can be mounted in a first guide slot 216b and can slide and rotate within the first guide slot 216b to achieve a sliding and rotational connection between the first pressure plate 41 and the first fixing frame 21b. Each first middle guide slider 412c can be mounted in a first guide slot 213c and can slide and rotate within the first guide slot 213c to achieve a sliding and rotational connection between the first pressure plate 41 and the first fixing frame 21c.

[0318] See also Figure 23 and Figure 24 , Figure 23 yes Figure 6 The schematic structural diagram of the second pressure plate 42 and the second pressure plate swing arm 44 of the pressure plate assembly 40 in the foldable mechanism 130 is shown. Figure 24 yes Figure 23 The structure diagram of the second pressure plate 42 and the second pressure plate swing arm 44 is shown at another angle.

[0319] The structure of the second pressing plate 42 is similar to that of the first pressing plate 41 (eg Figure 21 and Figure 22 ) are roughly the same. The structure of the second pressing plate 42 can refer to the relevant description of the first pressing plate 41 above, and will not be repeated here. The second pressing plate 42 is provided with a second guide hole 421, and the opening of the second guide hole 421 is located on the left side of the second pressing plate 42. In this embodiment, there are four second guide holes 421, and the four second guide holes 421 are arranged in sequence along the Y-axis direction. The four second guide holes 421 are respectively a second front guide hole 421a, a second rear guide hole 421b and a second middle guide hole 421c, and there are two second middle guide holes 421c. The second front guide hole 421a is located on the front side of the second pressing plate 42, the second rear guide hole 421b is located on the rear side of the second pressing plate 42, and the two second middle guide holes 421c are located in the middle of the second pressing plate 42.

[0320] The second pressure plate 42 is also provided with a second guide slider 422, which is disposed on the bottom surface of the second pressure plate 42. In this embodiment, there are six second guide sliders 422, which are spaced apart in sequence along the Y-axis. The six second guide sliders 422 are two second front guide sliders 422a, two second rear guide sliders 422b, and two second middle guide sliders 422c. The two second front guide sliders 422a are located on the front side of the second pressure plate 42, on opposite sides of the second front guide hole 421a. The two second rear guide sliders 422b are located on the rear side of the second pressure plate 42, on opposite sides of the second rear guide hole 421b. The two second middle guide sliders 422c are located in the middle portion of the second pressure plate 42, between the two second middle guide holes 421c, and spaced apart from the second middle guide holes 421c.

[0321] In one embodiment, the second pressure plate 42 includes a second support plate 423, four second auxiliary plates 424, and six second guide sliders 422. The four second auxiliary plates 424 and the six second guide sliders 422 are all mounted on the second support plate 423. The four second auxiliary plates 424 are mounted on the bottom surface of the second support plate 423 and are spaced apart from each other along the Y-axis. Each second auxiliary plate 424 and the second support plate 423 enclose a second guide hole 421. The six second guide sliders 422 are mounted on the bottom surface of the second support plate 423 and are spaced apart from each other along the Y-axis. Each second guide slider 422 forms a second guide slider 422.

[0322] The structure of the second pressure plate swing arm 44 is similar to that of the first pressure plate swing arm 43 (such as Figure 21 and Figure 22 ) are substantially the same. The structure of the second pressure plate swing arm 44 can be found in the description of the first pressure plate swing arm 43 above and will not be repeated here. In this embodiment, there are four second pressure plate swing arms 44, namely a second front pressure plate swing arm 44a, a second rear pressure plate swing arm 44b, and a second middle pressure plate swing arm 44c. There are two second middle pressure plate swing arms 44c.

[0323] The second front pressure plate swing arm 44a includes a rotating portion 441a, a connecting portion 442a and a sliding portion 443a, and the connecting portion 442a is connected between the rotating portion 441a and the sliding portion 443a. The structure of the sliding portion 443a is compatible with the structure of the second front guide hole 421a. The sliding portion 443a can be inserted into the second front guide hole 421a, and can slide relative to the second pressure plate 42 in the second front guide hole 421a to achieve a sliding connection between the second front pressure plate swing arm 44a and the second pressure plate 42. The rotating portion 441a includes two sub-rotating portions (not marked in the figure), and the two sub-rotating portions can be sleeved on the fourth rotating shaft 54a (such as Figure 8As shown), and can rotate relative to the fourth rotating shaft 54a to achieve a rotational connection between the second front pressure plate swing arm 44a and the limiting base 10.

[0324] The second rear pressure plate swing arm 44b includes a rotating portion 441b, a connecting portion 442b and a sliding portion 443b, and the connecting portion 442b is connected between the rotating portion 441b and the sliding portion 443b. The structure of the sliding portion 443b is compatible with the structure of the second rear guide hole 421b. The sliding portion 443b can be inserted into the second rear guide hole 421b, and can slide relative to the second pressure plate 42 in the second rear guide hole 421b to achieve a sliding connection between the second rear pressure plate swing arm 44b and the second pressure plate 42. The rotating portion 441b includes two sub-rotating portions (not marked in the figure), and the two sub-rotating portions can be sleeved on the fourth rotating shaft 54b (such as Figure 9 As shown), and can rotate relative to the fourth rotating shaft 54b to achieve a rotational connection between the second rear pressure plate swing arm 44b and the limiting base 10.

[0325] The second intermediate pressure plate swing arm 44c includes a rotating portion 441c, a connecting portion 442c and a sliding portion 443c, and the connecting portion 442c is connected between the rotating portion 441c and the sliding portion 443c. The structure of the sliding portion 443c is compatible with the structure of the second intermediate guide hole 421c. The sliding portion 443c of each second intermediate pressure plate swing arm 44c can be respectively inserted into a second intermediate guide hole 421c, and can slide relative to the second pressure plate 42 in the second intermediate guide hole 421c to achieve a sliding connection between each second intermediate pressure plate swing arm 44c and the second pressure plate 42. The rotating portion 441c includes two sub-rotating portions (not marked in the figure). The two sub-rotating portions of a second intermediate pressure plate swing arm 44c can be sleeved on the third rotating shaft 53c (such as Figure 10 As shown), and can rotate relative to the third rotating shaft 53c, the two sub-rotating parts of the other second middle pressure plate swing arm 44c can be sleeved on the fourth rotating shaft 54c (as shown Figure 10 As shown), and can rotate relative to the fourth rotating shaft 54c to achieve the rotational connection between the two second middle pressure plate swing arms 44c and the limiting base 10.

[0326] Please also refer to Figure 15 、 Figure 17 and Figure 19 In this embodiment, the front side of the second support plate 423 can be received in the receiving notch 221a of the second fixing frame 22a, the rear side of the second support plate 423 can be received in the receiving notch 221b of the second fixing frame 22b, and the middle portion of the second support plate 423 can be received in the receiving notch 221c of the second fixing frame 22c. One first auxiliary plate 414 can be received in the second avoidance groove 224a of the second fixing frame 22a, and one first auxiliary plate 414 can be received in the second avoidance groove 224b of the second fixing frame 22b.

[0327] Each second front guide slider 422a can be mounted in a second guide slot 226a and can slide and rotate within the second guide slot 226a to achieve a sliding and rotational connection between the second pressure plate 42 and the second fixing frame 22a. Each second rear guide slider 422b can be mounted in a second guide slot 226b and can slide and rotate within the second guide slot 226b to achieve a sliding and rotational connection between the second pressure plate 42 and the second fixing frame 22b. Each second middle guide slider 422c can be mounted in a second guide slot 223c and can slide and rotate within the second guide slot 223c to achieve a sliding and rotational connection between the second pressure plate 42 and the second fixing frame 22c.

[0328] Please also refer to Figure 5 and Figure 25 , Figure 25 yes Figure 1 FIG. 1 is a schematic structural diagram of the foldable mechanism 130 in the foldable terminal 1000 .

[0329] When the first fixed frame 21a and the second fixed frame 22a (the first fixed frame 21b and the first fixed frame 21b or the first fixed frame 21c and the second fixed frame 22c) rotate relative to the limit base 10, the first fixed frame 21a drives the first pressure plate 41 to slide and rotate relative to the first fixed frame 21a, and also drives the first pressure plate swing arm 43 to slide relative to the first fixed frame 21a and rotate relative to the limit base 10. The second fixed frame 22a drives the second pressure plate 42 to slide and rotate relative to the second fixed frame 22a, and also drives the second pressure plate swing arm 44 to slide relative to the second fixed frame 22a and rotate relative to the limit base 10, thereby realizing the rotation of the first pressure plate 41 and the second pressure plate 42 relative to the limit base 10, so that the first pressure plate 41 and the second pressure plate 42 rotate relative to each other, thereby realizing the mutual switching of the pressure plate assembly 40 between the folded state and the flattened state.

[0330] Please also refer to Figure 21 and Figure 23 The first front pressure plate swing arm 43a also includes a supporting portion 434a, which is located on the side of the rotating portion 431a away from the connecting portion 432a and is fixedly connected to the rotating portion 431a. The supporting portion 434a includes two sub-supporting portions (not shown), each of which is fixedly connected to a sub-rotating portion. Furthermore, the first rear pressure plate swing arm 43b also includes a supporting portion 434b, and the first intermediate pressure plate swing arm 43c also includes a supporting portion 434c.

[0331] The second front pressure plate swing arm 44a also includes a supporting portion 444a, which is located on the side of the rotating portion 441a away from the connecting portion 442a and is fixedly connected to the rotating portion 441. The supporting portion 444a includes two sub-supporting portions (not shown), each of which is fixedly connected to a sub-rotating portion. Furthermore, the second rear pressure plate swing arm 44b also includes a supporting portion 444b, and the second intermediate pressure plate swing arm 44c also includes a supporting portion 444c.

[0332] Please also refer to Figure 26 and Figure 27 , Figure 26 yes Figure 5 The cross-sectional structure diagram of the foldable mechanism 130 is shown along II. Figure 27 yes Figure 26 The structure diagram of the foldable mechanism 130 shown is in a folded state, wherein the section along II refers to the section along the plane where the II line is located. Similar descriptions in this application can be understood in the same way.

[0333] In this embodiment, the foldable mechanism 130 further includes a floating plate 60, which is mounted on the limiting base 10 (eg Figure 6 As shown). Exemplarily, the float plate 60 is mounted on the limiting base 10 via an elastic member such as a spring. When the foldable mechanism 130 is in the flattened state, the pressure plate assembly 40 is in the flattened state, and the first pressure plate 41 and the second pressure plate 42 are respectively located on both sides of the limiting base 10. The top surface of the first pressure plate 41, the top surface of the second pressure plate 42, and the top surface of the float plate 60 are flush. The top surface of the first pressure plate 41 (i.e., the top surface of the first support plate 413), the top surface of the second pressure plate 42 (i.e., the top surface of the second support plate 423), and the top surface of the float plate 60 form a support surface 1302. The abutting portion 434a of the first front pressure plate swing arm 43a and the abutting portion 434a of the second front pressure plate swing arm 44a both abut against the bottom surface of the float plate 60.

[0334] When the foldable mechanism 130 is in the folded state, the pressure plate assembly 40 is in the folded state, the first pressure plate 41 and the second pressure plate 42 are arranged opposite each other, and the first fixing frame (such as the first fixing frame 21a, the first fixing frame 21b, and the first fixing frame 21c described above), the second fixing frame (such as the second fixing frame 22a, the second fixing frame 22b, and the second fixing frame 22c described above), the first pressure plate 41, the second pressure plate 42, and the floating plate 60 enclose a clearance space 1303. The cross-section of the clearance space 1303 is "teardrop-shaped." It should be noted that the cross-section of the clearance space 1303 refers to the cross-section taken along the XZ plane.

[0335] When the pressure plate assembly 40 switches from a folded state to a flattened state, the supporting portion 434a of the first pressure plate swing arm 43 and the supporting portion 434a of the second pressure plate swing arm 44 can support the bottom surface of the floating plate 60, driving the floating plate 60 to float relative to the limiting base 10 (i.e., move along the positive direction of the Z axis), and drive the elastic member in the initial state to deform, until the supporting force applied to the floating plate 60 by the supporting portion of the first pressure plate swing arm 43 and the supporting portion of the second pressure plate swing arm 44 and the deformation force of the elastic member reach a balance.

[0336] When the pressure plate assembly 40 switches from the unfolded state to the folded state, the supporting portion 434a of the first pressure plate swing arm 43 and the supporting portion 434a of the first front pressure plate swing arm 43a do not abut the floating plate 60, and the supporting portion 444a of the second front pressure plate swing arm 44a does not abut the floating plate 60, that is, the supporting portion 434a of the first front pressure plate swing arm 43a and the supporting portion 444a of the second front pressure plate swing arm 44a do not apply a supporting force to the floating plate 60, and the floating plate 60 will sink relative to the limit base 10 (that is, move along the negative direction of the Z axis) driven by the restoring force of the elastic member until the elastic member returns to its initial state.

[0337] It should be noted that the coordination relationship between the first rear pressure plate swing arm 43b, the first intermediate pressure plate swing arm 43c, the second rear pressure plate swing arm 44b and the second intermediate pressure plate swing arm 44c and the floating plate 60 can be respectively referred to the coordination relationship between the first front pressure plate swing arm 43a and the second front pressure plate swing arm 44a and the floating plate 60, which will not be repeated here.

[0338] See also Figure 28 and Figure 29 , Figure 28 yes Figure 2 The schematic diagram of the partial cross-section structure of the foldable terminal 1000 is shown. Figure 29 yes Figure 1 The schematic diagram of the partial cross-section structure of the foldable terminal 1000 is shown. Figure 28 and Figure 29 The illustrated foldable terminal 1000 only shows the foldable mechanism 130 and the foldable portion 230 of the display screen 200 .

[0339] Specifically, the first fixing frame 21a (such as Figure 15 As shown), the first fixing frame 21b (as Figure 17 As shown) and the first fixing frame 21c (as Figure 19 ) is fixedly connected to the first housing 110, and the second fixing bracket 22a (as shown Figure 15 As shown), the second fixing frame 22b (as Figure 17 as shown) and a second fixing bracket 22c (as shown) Figure 191 and 12. As shown in FIG, the first fixing bracket 21a, the first fixing bracket 21b, and the first fixing bracket 21c are fixedly connected to the first housing 110 by fasteners such as screws or bolts, and the second fixing bracket 22a, the second fixing bracket 22b, and the second fixing bracket 22c are fixedly connected to the second housing 120 by fasteners such as screws or bolts.

[0340] At this time, the support surface 1302 formed by the first pressing plate 41, the second pressing plate 42, and the floating plate 60 can support the foldable portion 230 of the display screen 200, not only ensuring a good display of the display screen 200, but also preventing the foldable portion 230 from being damaged or dented by external force when the foldable portion 230 is touched, thereby improving the reliability of the display screen 200. The support surface 1302 can be flush with the top surface of the first housing 110 and the top surface of the second housing 120, so that the first pressing plate 41, the second pressing plate 42, and the floating plate 60 can jointly support the display screen 200 with the first housing 110 and the second housing 120, thereby achieving effective support for the display screen 200 by the foldable device 100 in the flattened state.

[0341] When the foldable terminal 1000 is folded, the foldable portion 230 of the display 200 is located inside the folding mechanism 130. Specifically, the foldable portion 230 is located within the escape space 1303. For example, the escape space 1303 is roughly "teardrop" shaped. In this case, the folding mechanism 130 avoids the rounded corners formed by the foldable portion 230 when it bends, preventing the foldable portion 230 from bending at a large angle. This prevents undesirable effects such as creases on the display 200, thereby extending the life of the display 200.

[0342] In the foldable mechanism 130 used in the foldable terminal 1000 shown in this embodiment, the rotation center D1 of the first damping swing arm 32b and the rotation center B1 of the first auxiliary swing arm 25b (or Figure 12 The rotation center C1 of the first damping swing arm 32a and the rotation center A1 of the first auxiliary swing arm 25a do not coincide with each other, and the rotation center D2 of the second damping swing arm 33b and the rotation center B2 of the second auxiliary swing arm 26b (or Figure 12The rotation center C2 of the second damping swing arm 33a and the rotation center A2 of the second auxiliary swing arm 26a do not overlap, thereby increasing the degree of freedom of assembly of the first damping swing arm 32b and the second damping swing arm 33b on the limiting base 10. Furthermore, the rotation center D1 of the first damping swing arm 32b and the rotation center D2 of the second damping swing arm 33b are both located between the rotation center B1 of the first auxiliary swing arm 25b and the rotation center B2 of the second auxiliary swing arm 26b. This reduces the size of the second damping assembly 30b along the X-axis, facilitating a reduction in the size of the foldable mechanism 130 along the X-axis, and thereby reducing the size of the foldable terminal 1000 along the X-axis, thereby facilitating a miniaturized design of the foldable terminal 1000.

[0343] The above description is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by any person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application; the embodiments of this application and the features of the embodiments can be combined with each other unless there is a conflict. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A foldable mechanism, characterized in that: The invention comprises a limit base, a first fixing frame, a first main swing arm, a first auxiliary swing arm, a damping member, a first damping swing arm, a second fixing frame, a second main swing arm, a second auxiliary swing arm, a second damping swing arm, a first pressure plate, a first pressure plate swing arm, a second pressure plate, and a second pressure plate swing arm, wherein the first main swing arm is rotatably connected to the first fixing frame and is slidably and rotatably connected to the limit base, the first auxiliary swing arm is slidably connected to the first fixing frame and is rotatably connected to the limit base, the damping member is mounted on the limit base, the first damping swing arm is rotatably connected to the damping member, and is slidably and rotatably connected to the first fixing frame; The rotation center of the first auxiliary swing arm relative to the limiting base is a first center, the rotation center of the first damping swing arm relative to the damping member is a second center, and the first center and the second center are spaced apart from each other. The second main swing arm is rotatably connected to the second fixing frame and is slidably and rotatably connected to the limit base; the second auxiliary swing arm is slidably connected to the second fixing frame and is rotatably connected to the limit base; the second damping swing arm is rotatably connected to the damping member and is slidably and rotatably connected to the second fixing frame; The first pressing plate is slidably and rotatably connected to the first fixing frame, the first pressing plate swing arm is rotatably connected to the limiting base and slidably connected to the first pressing plate, the second pressing plate is slidably and rotatably connected to the second fixing frame, the second pressing plate swing arm is rotatably connected to the limiting base and slidably connected to the second pressing plate; When the foldable mechanism is in a flattened state, the first pressing plate and the second pressing plate are respectively located on both sides of the limiting base; when the foldable mechanism is in a folded state, the first pressing plate and the second pressing plate are arranged opposite to each other.

2. The foldable mechanism according to claim 1, wherein: The second center is located inside the first center.

3. The foldable mechanism according to claim 1 or 2, characterized in that: The rotation center of the second auxiliary swing arm relative to the limit base is the third center, and the third center is parallel to and spaced apart from the first center. The rotation center of the second damping swing arm relative to the limit base is the fourth center, and the fourth center is parallel to and spaced apart from the second center, and is also spaced apart from the third center.

4. The foldable mechanism according to claim 3, wherein: The fourth center is located on a side of the third center facing the first center.

5. The foldable mechanism according to any one of claims 1, 2 and 4, characterized in that: The foldable mechanism also includes a first damping shaft, a second damping shaft and a damping plate. The first damping shaft and the second damping shaft are both installed on the limiting base and are arranged in parallel and at intervals. The first damping swing arm is sleeved on the first damping shaft, and the axis center of the first damping shaft is the second center. The second damping swing arm is sleeved on the second damping shaft, and the axis center of the second damping shaft is the fourth center. The damping plate is sleeved on the first damping shaft and the second damping shaft, and is arranged along the axial direction of the first damping shaft with the first damping swing arm and the second damping swing arm.

6. The foldable mechanism according to claim 3, wherein: The foldable mechanism also includes a first damping shaft, a second damping shaft and a damping plate. The first damping shaft and the second damping shaft are both installed on the limiting base and are arranged in parallel and at intervals. The first damping swing arm is sleeved on the first damping shaft, and the axis center of the first damping shaft is the second center. The second damping swing arm is sleeved on the second damping shaft, and the axis center of the second damping shaft is the fourth center. The damping plate is sleeved on the first damping shaft and the second damping shaft, and is arranged along the axial direction of the first damping shaft with the first damping swing arm and the second damping swing arm.

7. The foldable mechanism according to any one of claims 1, 2, 4 and 6, characterized in that: The foldable mechanism further includes a floating plate, and the floating plate is mounted on the limiting base; When the foldable mechanism is in a flattened state, the top surface of the floating plate is flush with the top surfaces of the first pressing plate and the second pressing plate, and the top surfaces of the first pressing plate, the second pressing plate and the floating plate form a supporting surface.

8. The foldable mechanism according to claim 3, wherein: The foldable mechanism further includes a floating plate, and the floating plate is mounted on the limiting base; When the foldable mechanism is in a flattened state, the top surface of the floating plate is flush with the top surfaces of the first pressing plate and the second pressing plate, and the top surfaces of the first pressing plate, the second pressing plate and the floating plate form a supporting surface.

9. The foldable mechanism according to claim 5, wherein: The foldable mechanism further includes a floating plate, and the floating plate is mounted on the limiting base; When the foldable mechanism is in a flattened state, the top surface of the floating plate is flush with the top surfaces of the first pressing plate and the second pressing plate, and the top surfaces of the first pressing plate, the second pressing plate and the floating plate form a supporting surface.

10. The foldable mechanism according to claim 7, wherein: When the foldable mechanism is in a folded state, the first fixing frame, the second fixing frame, the first pressing plate, the second pressing plate and the floating plate enclose an escape space, and a cross section of the escape space is in the shape of a water drop.

11. The foldable mechanism according to claim 8 or 9, characterized in that: When the foldable mechanism is in a folded state, the first fixing frame, the second fixing frame, the first pressing plate, the second pressing plate and the floating plate enclose an escape space, and a cross section of the escape space is in the shape of a water drop.

12. The foldable mechanism according to claim 7, wherein: The floating plate is mounted on the limiting base via an elastic member; When the foldable mechanism switches from the flattened state to the folded state, the elastic member drives the floating plate to sink relative to the base; When the foldable mechanism switches from the folded state to the flattened state, the first pressure plate swing arm and the second pressure plate swing arm both abut against the bottom surface of the floating plate to drive the floating plate to float relative to the base.

13. The foldable mechanism according to any one of claims 8 to 10, characterized in that: The floating plate is mounted on the limiting base via an elastic member; When the foldable mechanism switches from the flattened state to the folded state, the elastic member drives the floating plate to sink relative to the base; When the foldable mechanism switches from the folded state to the flattened state, the first pressure plate swing arm and the second pressure plate swing arm both abut against the bottom surface of the floating plate to drive the floating plate to float relative to the base.

14. The foldable mechanism according to claim 11, wherein: The floating plate is mounted on the limiting base via an elastic member; When the foldable mechanism switches from the flattened state to the folded state, the elastic member drives the floating plate to sink relative to the base; When the foldable mechanism switches from the folded state to the flattened state, the first pressure plate swing arm and the second pressure plate swing arm both abut against the bottom surface of the floating plate to drive the floating plate to float relative to the base.

15. The foldable mechanism according to any one of claims 1, 2, 4, 6, 8 to 10, 12 and 14, characterized in that The first fixing frame is provided with a first guide groove, the second fixing frame is provided with a second guide groove, the first pressure plate includes a first support plate and a first guide slider, the first guide slider is fixedly connected to the bottom surface of the first support plate, the first guide slider is installed in the first guide groove, and can slide and rotate relative to the first fixing frame, the second pressure plate includes a second support plate and a second guide slider, the second guide slider is fixedly connected to the bottom surface of the second support plate, the second guide slider is installed in the second guide groove, and can slide and rotate relative to the second fixing frame.

16. The foldable mechanism according to claim 3, wherein: The first fixing frame is provided with a first guide groove, the second fixing frame is provided with a second guide groove, the first pressure plate includes a first support plate and a first guide slider, the first guide slider is fixedly connected to the bottom surface of the first support plate, the first guide slider is installed in the first guide groove, and can slide and rotate relative to the first fixing frame, the second pressure plate includes a second support plate and a second guide slider, the second guide slider is fixedly connected to the bottom surface of the second support plate, the second guide slider is installed in the second guide groove, and can slide and rotate relative to the second fixing frame.

17. The foldable mechanism according to claim 7, wherein: The first fixing frame is provided with a first guide groove, the second fixing frame is provided with a second guide groove, the first pressure plate includes a first support plate and a first guide slider, the first guide slider is fixedly connected to the bottom surface of the first support plate, the first guide slider is installed in the first guide groove, and can slide and rotate relative to the first fixing frame, the second pressure plate includes a second support plate and a second guide slider, the second guide slider is fixedly connected to the bottom surface of the second support plate, the second guide slider is installed in the second guide groove, and can slide and rotate relative to the second fixing frame.

18. The foldable mechanism according to claim 11, wherein: The first fixing frame is provided with a first guide groove, the second fixing frame is provided with a second guide groove, the first pressure plate includes a first support plate and a first guide slider, the first guide slider is fixedly connected to the bottom surface of the first support plate, the first guide slider is installed in the first guide groove, and can slide and rotate relative to the first fixing frame, the second pressure plate includes a second support plate and a second guide slider, the second guide slider is fixedly connected to the bottom surface of the second support plate, the second guide slider is installed in the second guide groove, and can slide and rotate relative to the second fixing frame.

19. The foldable mechanism according to claim 13, wherein: The first fixing frame is provided with a first guide groove, the second fixing frame is provided with a second guide groove, the first pressure plate includes a first support plate and a first guide slider, the first guide slider is fixedly connected to the bottom surface of the first support plate, the first guide slider is installed in the first guide groove, and can slide and rotate relative to the first fixing frame, the second pressure plate includes a second support plate and a second guide slider, the second guide slider is fixedly connected to the bottom surface of the second support plate, the second guide slider is installed in the second guide groove, and can slide and rotate relative to the second fixing frame.

20. The foldable mechanism according to claim 15, wherein: The first support plate and the first guide slider are integrally formed, and / or the second support plate and the second guide slider are integrally formed.

21. The foldable mechanism according to any one of claims 16 to 19, wherein: The first support plate and the first guide slider are integrally formed, and / or the second support plate and the second guide slider are integrally formed.

22. The foldable mechanism according to claim 15, wherein: The first pressing plate further includes a first auxiliary plate, the first auxiliary plate being fixedly connected to the bottom surface of the first supporting plate and enclosing a first guide hole with the first supporting plate, and the first pressing plate swing arm being slidably mounted in the first guide hole; The second pressure plate further includes a second auxiliary plate, which is fixedly connected to the bottom surface of the second support plate and enclosed with the second support plate to form a second guide hole, and the second pressure plate swing arm is slidably installed in the second guide hole.

23. The foldable mechanism according to any one of claims 16 to 20, characterized in that The first pressing plate further includes a first auxiliary plate, the first auxiliary plate being fixedly connected to the bottom surface of the first supporting plate and enclosing a first guide hole with the first supporting plate, and the first pressing plate swing arm being slidably mounted in the first guide hole; The second pressure plate further includes a second auxiliary plate, which is fixedly connected to the bottom surface of the second support plate and enclosed with the second support plate to form a second guide hole, and the second pressure plate swing arm is slidably installed in the second guide hole.

24. The foldable mechanism according to claim 21, wherein: The first pressing plate further includes a first auxiliary plate, the first auxiliary plate being fixedly connected to the bottom surface of the first supporting plate and enclosing a first guide hole with the first supporting plate, and the first pressing plate swing arm being slidably mounted in the first guide hole; The second pressure plate further includes a second auxiliary plate, which is fixedly connected to the bottom surface of the second support plate and enclosed with the second support plate to form a second guide hole, and the second pressure plate swing arm is slidably installed in the second guide hole.

25. The foldable mechanism according to claim 22 or 24, characterized in that: The first support plate and the first auxiliary plate are integrally formed, and / or the first support plate and the second auxiliary plate are integrally formed.

26. The foldable mechanism according to claim 23, wherein: The first support plate and the first auxiliary plate are integrally formed, and / or the first support plate and the second auxiliary plate are integrally formed.

27. The foldable mechanism according to claim 5, wherein: The foldable mechanism further includes a plurality of gears, all of which are mounted on the limiting base, and two adjacent gears are meshed with each other. One gear is sleeved on the first damping shaft, and the other gear is sleeved on the second damping shaft.

28. The foldable mechanism according to claim 6, wherein: The foldable mechanism further includes a plurality of gears, all of which are mounted on the limiting base, and two adjacent gears are meshed with each other. One gear is sleeved on the first damping shaft, and the other gear is sleeved on the second damping shaft.

29. A foldable mechanism according to any one of claims 1, 2, 4, 6, 8 to 10, 12, 14, 16 to 20, 22, 24 and 26 to 28, wherein: The foldable mechanism includes two connecting components, which are arranged at intervals along the extension direction of the limiting base. Each of the connecting components includes the first fixing frame, the first main swing arm, the first auxiliary swing arm and the first damping swing arm.

30. The foldable mechanism according to claim 3, wherein: The foldable mechanism includes two connecting components, which are arranged at intervals along the extension direction of the limiting base. Each of the connecting components includes the first fixing frame, the first main swing arm, the first auxiliary swing arm and the first damping swing arm.

31. The foldable mechanism according to claim 7, wherein: The foldable mechanism includes two connecting components, which are arranged at intervals along the extension direction of the limiting base. Each of the connecting components includes the first fixing frame, the first main swing arm, the first auxiliary swing arm and the first damping swing arm.

32. The foldable mechanism according to claim 11, wherein: The foldable mechanism includes two connecting components, which are arranged at intervals along the extension direction of the limiting base. Each of the connecting components includes the first fixing frame, the first main swing arm, the first auxiliary swing arm and the first damping swing arm.

33. The foldable mechanism according to claim 13, wherein: The foldable mechanism includes two connecting components, which are arranged at intervals along the extension direction of the limiting base. Each of the connecting components includes the first fixing frame, the first main swing arm, the first auxiliary swing arm and the first damping swing arm.

34. The foldable mechanism according to claim 15, wherein: The foldable mechanism includes two connecting components, which are arranged at intervals along the extension direction of the limiting base. Each of the connecting components includes the first fixing frame, the first main swing arm, the first auxiliary swing arm and the first damping swing arm.

35. The foldable mechanism according to claim 21, wherein: The foldable mechanism includes two connecting components, which are arranged at intervals along the extension direction of the limiting base. Each of the connecting components includes the first fixing frame, the first main swing arm, the first auxiliary swing arm and the first damping swing arm.

36. The foldable mechanism according to claim 23, wherein: The foldable mechanism includes two connecting components, which are arranged at intervals along the extension direction of the limiting base. Each of the connecting components includes the first fixing frame, the first main swing arm, the first auxiliary swing arm and the first damping swing arm.

37. The foldable mechanism according to claim 25, wherein: The foldable mechanism includes two connecting components, which are arranged at intervals along the extension direction of the limiting base. Each of the connecting components includes the first fixing frame, the first main swing arm, the first auxiliary swing arm and the first damping swing arm.

38. A foldable terminal, characterized in that: It comprises a first shell, a second shell and a foldable mechanism as claimed in any one of claims 1 to 37, wherein the foldable mechanism connects the first shell and the second shell, and the first fixing frame is fixedly connected to the first shell.

Images