Foldable mechanism and foldable terminal

Abstract

The application provides a foldable mechanism and a foldable terminal comprising the foldable mechanism. The foldable mechanism is simple in structure and is conducive to lightweight design of the foldable terminal. The foldable mechanism comprises a base and a pressing plate assembly, and the pressing plate assembly is installed on the base. The pressing plate assembly comprises a first pressing plate and a first pressing plate swing arm. The first pressing plate is a one-piece structure. A sliding part of the first pressing plate swing arm is slidably connected with the first pressing plate, so as to realize sliding connection between the first pressing plate swing arm and the first pressing plate. A rotating part of the first pressing plate swing arm is rotatably connected with the base, so as to realize rotating connection between the first pressing plate swing arm and the base.

Description

[0001] This application is a divisional application, the original application number is 202210336293.5, the original application date is March 31, 2022, and the entire contents of the original application are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the field of foldable terminals, in particular to a foldable mechanism and a foldable terminal. BACKGROUND

[0003] With the progress of science and technology, the era of large-screen intelligent terminals has arrived. Foldable terminals are favored by users due to their large screens and convenient portability. Currently, foldable terminals often use foldable mechanisms to achieve folding and unfolding. However, existing foldable mechanisms often require a large number of components to achieve folding and unfolding, resulting in a complex structure of the foldable mechanism, which is not conducive to lightweight design of the foldable terminal. SUMMARY

[0004] The present application provides a foldable mechanism and a foldable terminal, which can simplify the structure of the foldable mechanism and achieve lightweight design of the foldable terminal.

[0005] In a first aspect, the present application provides a foldable mechanism, comprising a base and a pressing plate assembly, the pressing plate assembly being mounted on the base. The pressing plate assembly comprises a first pressing plate and a first pressing plate swing arm. The first pressing plate is a one-piece structural member. The sliding part of the first pressing plate swing arm is slidingly connected to the first pressing plate to achieve sliding connection between the first pressing plate swing arm and the first pressing plate. The rotating part of the first pressing plate swing arm is rotatably connected to the base to achieve rotational connection between the first pressing plate swing arm and the base.

[0006] In the foldable mechanism shown in the present application, the first pressing plate is a one-piece structural member, which not only improves the overall strength of the first pressing plate and ensures the structural stability of the first pressing plate, but also reduces the number of components of the pressing plate assembly, facilitates assembly of the foldable mechanism, helps improve the assembly precision between the pressing plate assembly and other components, and is conducive to achieving lightweight design of the foldable mechanism.

[0007] In an embodiment, the first pressing plate comprises a support part and an auxiliary part, the auxiliary part being fixedly connected to the bottom surface of the support part, the auxiliary part being provided with a sliding hole, or the auxiliary part and the support part enclosing the sliding hole. The sliding part of the first pressing plate swing arm is arranged in the sliding hole and can slide relative to the first pressing plate in the sliding hole to achieve sliding connection between the sliding part of the first pressing plate swing arm and the first pressing plate.

[0008] The support part and the auxiliary part are integrally formed.

[0009] In an embodiment, the first pressing plate further comprises a guide sliding block, the guide sliding block being fixedly connected to the bottom surface of the support part and being spaced apart from the auxiliary part.

[0010] The foldable mechanism further comprises a connecting assembly, which is mounted on the base and connected with the pressing plate assembly. The connecting assembly comprises a first fixing frame, which is slidingly and rotatably connected with the first pressing plate.

[0011] The first fixing frame is provided with a guide groove. A guide sliding block is mounted in the guide groove and can slide and rotate relative to the first fixing frame in the guide groove to realize the sliding and rotational connection between the first pressing plate and the first fixing frame.

[0012] In one embodiment, the pressing plate assembly of the foldable mechanism further comprises a second pressing plate and a second pressing plate swing arm. The second pressing plate is an integrally formed structural member. The sliding portion of the second pressing plate swing arm is slidingly connected with the second pressing plate to realize the sliding connection between the second pressing plate swing arm and the second pressing plate. The rotating portion of the second pressing plate swing arm is rotatably connected with the base to realize the rotational connection between the second pressing plate swing arm and the base.

[0013] In the foldable mechanism shown in the present application, the second pressing plate is an integrally formed structural member, which not only can improve the overall strength of the second pressing plate and ensure the structural stability of the second pressing plate, but also can reduce the parts of the pressing plate assembly, facilitate the assembly of the foldable mechanism, help to improve the assembly precision between the pressing plate assembly and other components, and be conducive to the lightweight design of the foldable mechanism.

[0014] In one embodiment, the second pressing plate comprises a supporting portion and an auxiliary portion, the auxiliary portion is fixedly connected to the bottom surface of the supporting portion, the auxiliary portion is provided with a sliding hole, or the auxiliary portion and the supporting portion enclose the sliding hole. The sliding portion of the second pressing plate swing arm is arranged in the sliding hole and can slide relative to the second pressing plate in the sliding hole to realize the sliding connection between the sliding portion of the second pressing plate swing arm and the second pressing plate.

[0015] The supporting portion and the auxiliary portion are integrally formed.

[0016] In one embodiment, the foldable mechanism further comprises a flexible support plate, which is mounted on the pressing plate assembly. The flexible support plate is mounted on the first pressing plate swing arm and the second pressing plate swing arm and can be bent under the driving of the first pressing plate swing arm and / or the second pressing plate swing arm. The bending direction of the flexible support plate is parallel to the rotation center of the first pressing plate swing arm and the second pressing plate swing arm relative to the base.

[0017] When the foldable mechanism is in the unfolded state, the first pressing plate and the second pressing plate are respectively located on the opposite sides of the base, the top surface of the flexible support plate, the top surface of the first pressing plate and the top surface of the second pressing plate are flush, and together form a support surface.

[0018] When the foldable mechanism is applied to a foldable terminal, the support surface can support the foldable part of the display screen, which not only ensures good display of the display screen, but also prevents the foldable part from being damaged or dented by external touch, thereby improving the use reliability of the display screen. Moreover, since the flexible support plate is not designed with an opening, the top surface of the flexible support plate is a complete plane, so that the area of the support surface is larger, which can better support the foldable part and improve the support effect of the flexible support plate on the foldable part.

[0019] In an embodiment, the connecting part of the first pressing plate swing arm is provided with an assembly hole, and the connecting part of the second pressing plate swing arm is provided with an assembly hole.

[0020] The flexible support plate comprises a flexible support part, a first fixing part and a second fixing part. The first fixing part and the second fixing part are both fixedly connected to the bottom surface of the flexible support part and are spaced apart from each other. The first fixing part is mounted in the assembly hole of the first pressing plate swing arm, and the second fixing part is mounted in the assembly hole of the second pressing plate swing arm, so as to realize the assembly between the flexible support plate and the pressing plate assembly.

[0021] In an embodiment, the flexible support part is provided with a plurality of strip-shaped grooves, and the plurality of strip-shaped grooves are arranged in parallel and at intervals. The extension direction of each strip-shaped groove is parallel to the bending direction of the flexible support plate, so as to ensure the flexibility of the flexible support plate.

[0022] In an embodiment, the openings of the plurality of strip-shaped grooves are located on the bottom surface of the flexible support plate, so as to ensure the integrity of the top surface of the flexible support plate. The strip-shaped grooves are recessed from the bottom surface of the flexible support plate to the direction away from the top surface, and penetrate through the front end surface and the rear end surface of the flexible support plate. The strip-shaped grooves are arranged at intervals from the first fixing part and the second fixing part.

[0023] In an embodiment, the rotating part of the first pressing plate swing arm is slidingly and rotatably connected to the base, and the rotating part of the second pressing plate swing arm is slidingly and rotatably connected to the base.

[0024] When the first pressing plate swing arm and the second pressing plate swing arm rotate relative to the base, displacement will be generated between the first pressing plate swing arm and the base and between the second pressing plate swing arm and the base. The displacement generated by the first pressing plate swing arm and the second pressing plate swing arm is matched with the size change of the flexible support plate caused by bending, so as to ensure the flatness of the flexible support plate and avoid wrinkles on the flexible support plate.

[0025] In an embodiment, the connecting assembly of the foldable mechanism further comprises a second fixing frame, and the second fixing frame is slidingly and rotatably connected to the second pressing plate.

[0026] When the foldable mechanism is in the folded state, the first pressing plate and the second pressing plate are arranged oppositely, and the first pressing plate, the second pressing plate, the first fixing frame, the second fixing frame and the flexible support plate enclose an avoiding space, and the avoiding space is in the shape of a water droplet.

[0027] When the foldable mechanism is applied to a foldable terminal, the avoiding space can avoid the R angle formed when the foldable part is bent, so that the foldable part will not appear a large bending, and the display screen will not produce a crease and other adverse phenomena, which helps to prolong the service life of the display screen.

[0028] In an embodiment, the base is provided with an avoiding groove, and when the foldable mechanism is in the folded state, the avoiding groove is used to avoid the bottom of the flexible support plate, so as to avoid interference between the base and the flexible support plate, so as to form the avoiding space in the shape of a water droplet.

[0029] In an embodiment, the second pressing plate further comprises a guide sliding block, which is fixedly connected to the bottom surface of the supporting part and is spaced apart from the auxiliary part.

[0030] The second fixing frame is provided with a guide groove, and the guide sliding block is installed in the guide groove and can slide and rotate in the guide groove relative to the second fixing frame, so as to realize the sliding and rotating connection between the second pressing plate and the second fixing frame.

[0031] In an embodiment, the connecting assembly of the foldable mechanism further comprises a first main swing arm and a second main swing arm. The rotating part of the first main swing arm is rotationally connected to the first fixing frame, so as to realize the rotational connection between the first main swing arm and the first fixing frame. The sliding part of the first main swing arm is slidingly and rotationally connected to the base, so as to realize the sliding and rotational connection between the first main swing arm and the base. The rotating part of the second main swing arm is rotationally connected to the second fixing frame, so as to realize the rotational connection between the second main swing arm and the second fixing frame. The sliding part of the second main swing arm is slidingly and rotationally connected to the base, so as to realize the sliding and rotational connection between the second main swing arm and the base.

[0032] In an embodiment, the flexible support part is further provided with a first avoiding groove and a second avoiding groove, and the openings of the first avoiding groove and the second avoiding groove are located on the bottom surface of the flexible support part.

[0033] When the foldable mechanism is in the unfolded state, the first avoiding groove is used to avoid the sliding part of the first main swing arm, and the second avoiding groove is used to avoid the sliding part of the second main swing arm, so as to avoid interference between the first main swing arm and the second main swing arm and the flexible support plate, so that the flexible support part will not be protruded relative to the top surface of the first pressing plate and the top surface of the second pressing plate due to being pressed by the first main swing arm and the second main swing arm, and the top surface of the flexible support plate is ensured to be flush with the top surface of the first pressing plate and the top surface of the second pressing plate.

[0034] In the embodiment, the first avoiding groove and the second avoiding groove are in communication with one or more strip-shaped grooves.

[0035] In an embodiment, the connecting assembly of the foldable mechanism further comprises a first sub-swing arm and a second sub-swing arm. The sliding part of the first sub-swing arm is slidingly connected to the first fixed frame to achieve sliding connection between the first sub-swing arm and the first fixed frame. The rotating part of the first sub-swing arm is rotatably connected to the base to achieve rotating connection between the first sub-swing arm and the base. The sliding part of the second sub-swing arm is slidingly connected to the second fixed frame to achieve sliding connection between the second sub-swing arm and the second fixed frame. The rotating part of the second sub-swing arm is rotatably connected to the base to achieve rotating connection between the second sub-swing arm and the base.

[0036] In an embodiment, the flexible support part is further provided with a third avoiding slot and a fourth avoiding slot, and the openings of the third avoiding slot and the fourth avoiding slot are located on the bottom surface of the flexible support part. When the foldable mechanism is in the unfolded state, the third avoiding slot is used for avoiding the rotating part of the first sub-swing arm, and the fourth avoiding slot is used for avoiding the rotating part of the second sub-swing arm, so as to avoid interference between the first sub-swing arm and the second sub-swing arm and the flexible support plate, so that the flexible support part will not be pushed by the first sub-swing arm and the second sub-swing arm to protrude relative to the top surface of the first pressing plate and the top surface of the second pressing plate, and the top surface of the flexible support plate is ensured to be flush with the top surface of the first pressing plate and the top surface of the second pressing plate.

[0037] In an embodiment, the third avoiding slot and the fourth avoiding slot are in communication with one or more strip-shaped slots.

[0038] In an embodiment, the foldable mechanism further comprises a damping assembly, and the damping assembly is installed on the connecting assembly. During folding or unfolding of the connecting assembly relative to the base, the damping assembly can provide a damping force.

[0039] The damping assembly comprises a first damping member and a second damping member. The first damping member is installed on the first fixed frame and fixedly connected to the first sub-swing arm, and can slide relative to the first fixed frame under the driving of the first sub-swing arm. The second damping member is installed on the second fixed frame and fixedly connected to the second sub-swing arm, and can slide relative to the second fixed frame under the driving of the second sub-swing arm.

[0040] When the foldable mechanism is applied to a foldable terminal, during use of the foldable terminal, such as when the foldable terminal is in a folded state or an unfolded state, and when the foldable terminal is switched between the folded state and the unfolded state, the user can obviously feel the damping force provided by the damping assembly, the user can experience a better hand feeling, and the user's use experience is improved.

[0041] In an embodiment, the foldable mechanism further comprises a synchronizing member, and the synchronizing member is installed on the base and slidingly connected to the connecting assembly. The synchronizing member is slidingly connected to the first sub-swing arm and the second sub-swing arm to enable the first sub-swing arm and the second sub-swing arm to rotate synchronously relative to the base.

[0042] In one implementation, the rotating part of the first sub-swing arm is provided with a first helical groove, and the rotating part of the second sub-swing arm is provided with a second helical groove.

[0043] The synchronous component includes a fixed column and a synchronous slider. The fixed column is installed on the base, and the synchronous slider is installed on the fixed column and can slide relative to the fixed column. The first cam of the synchronous slider is installed on the first helical groove and can slide in the first helical groove relative to the rotating part of the first sub-swing arm. The second cam of the synchronous slider is installed on the second helical groove and can slide in the second helical groove relative to the rotating part of the second sub-swing arm.

[0044] When the first sub-swing arm rotates relative to the base, the first cam slides in the first helical groove relative to the rotating part of the first sub-swing arm, to drive the slider to slide relative to the fixed column, to drive the second cam to slide in the second helical groove relative to the rotating part of the second sub-swing arm, and to further drive the second sub-swing arm to rotate relative to the base, so as to realize the synchronous rotation between the first sub-swing arm and the second sub-swing arm.

[0045] Similarly, when the second sub-swing arm rotates relative to the base, the synchronous component can drive the first sub-swing arm to rotate relative to the base, so as to realize the synchronous rotation between the first sub-swing arm and the second sub-swing arm.

[0046] In a second aspect, the application provides a foldable terminal, which includes a first shell, a second shell, and any one of the above foldable mechanisms. The foldable mechanism is connected between the first shell and the second shell.

[0047] In the foldable mechanism used in the foldable terminal, the first pressing plate is an integrally formed structural member, which can not only improve the overall strength of the first pressing plate and ensure the structural stability of the first pressing plate, but also can reduce the parts of the pressing plate assembly, facilitate the assembly of the foldable mechanism, help to improve the assembly precision between the pressing plate assembly and other components, and be conducive to the lightweight design of the foldable terminal. BRIEF DESCRIPTION OF DRAWINGS

[0048] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will illustrate the drawings needed to be used by the embodiments of the application.

[0049] Figure 1 is a structural schematic diagram of a foldable terminal provided by the embodiments of the application in a state;

[0050] Figure 2 is Figure 1 is a structural schematic diagram of a foldable terminal provided by the embodiments of the application in a state;

[0051] Figure 3 is Figure 2 is an exploded structural schematic diagram of a foldable terminal provided by the embodiments of the application;

[0052] Figure 4 isFigure 3 Exploded structural schematic view of the foldable device in the foldable terminal shown in FIG. 1;

[0053] Figure 5a is Figure 4 Structural schematic view of the foldable mechanism in the foldable device shown in FIG. 1;

[0054] Figure 5b is Figure 5a Structural schematic view of the foldable mechanism shown in FIG. 1 from another angle;

[0055] Figure 6 is Figure 5a Exploded structural schematic view of the foldable mechanism shown in FIG. 1;

[0056] Figure 7 is Figure 6 Structural schematic view of the base in the foldable mechanism shown in FIG. 1;

[0057] Figure 8 is Figure 7 Structural schematic view of the first portion of the base shown in FIG. 1;

[0058] Figure 9 is Figure 7 Structural schematic view of the second portion of the base shown in FIG. 1;

[0059] Figure 10 is Figure 7 Structural schematic view of the third portion of the base shown in FIG. 1;

[0060] Figure 11 is Figure 6 Structural schematic view of the first connecting assembly, the first damping assembly, and the first synchronization member in the foldable mechanism shown in FIG. 1;

[0061] Figure 12 is Figure 11 Structural schematic view of the first connecting assembly, the first damping assembly, and the first synchronization member shown in FIG. 1 from another angle;

[0062] Figure 13 is Figure 6 Structural schematic view of the second connecting assembly, the second damping assembly, and the second synchronization member in the foldable mechanism shown in FIG. 1;

[0063] Figure 14 is Figure 13 Structural schematic view of the second connecting assembly, the second damping assembly, and the second synchronization member shown in FIG. 1 from another angle;

[0064] Figure 15 is Figure 6 Structural schematic view of the third connecting assembly in the foldable mechanism shown in FIG. 1;

[0065] Figure 16 is Figure 15A structural schematic view of the third connecting assembly shown in another angle;

[0066] Figure 17 is Figure 6 A structural schematic view of the pressing plate assembly in the foldable mechanism shown;

[0067] Figure 18 is Figure 17 A structural schematic view of the pressing plate assembly shown in another angle;

[0068] Figure 19 is Figure 6 A structural schematic view of the support plate in the foldable mechanism shown;

[0069] Figure 20 is Figure 19 A structural schematic view of the support plate shown in another angle;

[0070] Figure 21 is Figure 5a A sectional structural schematic view of the foldable mechanism along I-I shown;

[0071] Figure 22 is Figure 5a A structural schematic view of the foldable mechanism in a folded state shown;

[0072] Figure 23 is Figure 22 A sectional structural schematic view of the foldable mechanism along II-II shown;

[0073] Figure 24 is Figure 2 A partial sectional structural schematic view of the foldable terminal shown;

[0074] Figure 25 is Figure 24 A structural schematic view of the foldable terminal in a folded state shown. DETAILED DESCRIPTION

[0075] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application.

[0076] Please refer to Figure 1 and Figure 2 , Figure 1 is a structural schematic view of a foldable terminal 1000 in a state provided by the embodiments of the present application, Figure 2 is Figure 1 is a structural schematic view of the foldable terminal 1000 in a second state shown.

[0077] The foldable terminal 1000 can be a foldable electronic product such as a mobile phone, a tablet computer, a personal computer, a multimedia player, an electronic book reader, a notebook computer, a vehicle-mounted device, or a 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 be switched between a folded state and an unfolded state.

[0078] For ease of description, the width 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.

[0079] It should be noted that the parallel and perpendicular in the embodiments of the present application are relative position relations, and are not strictly defined in the mathematical sense. A small amount of deviation is allowed, and approximately parallel and approximately perpendicular are acceptable. For example, A is parallel to B, which means that A and B are parallel or approximately parallel, and the included angle between A and B is between 0 degrees and 10 degrees. For example, A is perpendicular to B, which means that A and B are perpendicular or approximately perpendicular, and the included angle between A and B is between 80 degrees and 100 degrees.

[0080] 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. In this embodiment, Figure 1 The foldable terminal 1000 shown in the figure is in a folded state, and the size of the foldable terminal 1000 in the X-axis direction is small, so the foldable terminal 1000 is convenient to carry. Figure 2 The foldable terminal 1000 shown in the figure is in an unfolded state, and the size of the foldable terminal 1000 in the X-axis direction is large, so the foldable terminal 1000 has a large display area. For example, Figure 2 The unfolding angle α of the foldable terminal 1000 shown in the figure is 180 degrees. That is, Figure 2 The foldable terminal 1000 shown in the figure is in a flat state.

[0081] It should be noted that the angles illustrated in the embodiments of the present application allow a small amount of deviation. For example, Figure 2 The unfolding angle α of the foldable terminal 1000 shown in the figure is 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 illustrated in the following embodiments can be understood in the same way.

[0082] It should be understood that the foldable terminal 1000 shown in the embodiments of the present application is a terminal that can be folded once. In some other embodiments, the foldable terminal 1000 can also be a terminal that can be folded multiple times (more than twice). At this time, the foldable terminal 1000 can include multiple parts, and adjacent two parts can be relatively close to be folded to the foldable terminal 1000 in a folded state, and adjacent two parts can also be relatively far away to be unfolded to the foldable terminal 1000 in an unfolded state.

[0083] Please refer to Figure 3 , Figure 3 is Figure 2 the exploded structural diagram of the foldable terminal 1000.

[0084] The foldable terminal 1000 includes a foldable device 100 and a display screen 200, and the display screen 200 is installed on the foldable device 100. The display screen 200 includes a display surface (not marked in the figure) facing away from the foldable device 100, and the display surface is used to display information such as text, images or videos. In the present embodiment, the display screen 200 includes a first display part 210, a second display part 220 and a foldable part 230, and the foldable part 230 is connected between the first display part 210 and the second display part 220. Among them, the foldable part 230 can be bent around the Y-axis direction.

[0085] As shown in Figure 1 , when the foldable terminal 1000 is in a folded state, the first display part 210 and the second display part 220 are relatively arranged, and the foldable part 230 is bent. At this time, the display screen 200 is in a folded state, and the exposed area of the display screen 200 is relatively small, which can greatly reduce the probability of damage to the display screen 200, and effectively protect the display screen 200. As shown in Figure 2 , when the foldable terminal 1000 is in an unfolded state, the first display part 210 and the second display part 220 are relatively unfolded, and the foldable part 230 is flattened without bending. At this time, the included angle between the first display part 210, the second display part 220 and the foldable part 230 is α, the display screen 200 has a large display area, and the large-screen display of the foldable terminal 1000 is realized, and the user's use experience is improved.

[0086] It should be understood that the foldable terminal 1000 shown in the embodiments of the present application is folded in an inward folding manner, and the display screen 200 of the foldable terminal 1000 in a folded state is located on the inner side of the foldable device 100. In some other embodiments, the foldable terminal 1000 can also be folded in an outward folding manner, at this time, the display screen 200 of the foldable terminal 1000 in a folded state is located on the outer side of the foldable device 100.

[0087] Please refer toFigure 4 , Figure 4 is Figure 3 is a disassembled structural schematic view of the foldable device 100 in the foldable terminal 1000 shown in FIG. 1.

[0088] In this embodiment, the foldable device 100 includes a first housing 110, a second housing 120, and a foldable mechanism 130 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 carries a first display portion 210, and the second housing 120 carries a second display portion 220. In other words, the first display portion 210 is mounted to the first housing 110, and the second display portion 220 is mounted to the second housing 120. The foldable mechanism 130 is disposed opposite the foldable portion 230.

[0089] The first housing 110 and the second housing 120 can be relatively rotated by the foldable mechanism 130, so that the foldable device 100 is switched between a folded state and an unfolded state. Specifically, the first housing 110 and the second housing 120 can be relatively rotated to be oppositely disposed, so that the foldable device 100 is in the folded state, as shown in FIG. 2. At this time, the foldable mechanism 130 is in the folded state. The first housing 110 and the second housing 120 can also be relatively rotated to be oppositely unfolded, so that the foldable device 100 is in the unfolded state, as shown in FIG. 3. At this time, the foldable mechanism 130 is in the unfolded state. Exemplarily, as shown in FIG. 4, the foldable terminal 1000 is in the unfolded state, and the included angle between the first housing 110 and the second housing 120 is a. At this time, the foldable mechanism 130 is in the unfolded state. Figure 1 Figure 2 Figure 2

[0090] The first housing 110 is provided with a first receiving groove 1101 located on the 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 to the bottom surface of the first housing 110 and penetrates the right side surface of the first housing 110.

[0091] The second housing 120 and the first housing 110 are the same in structure and are mirror-symmetric with respect to the foldable mechanism 130. The second housing 120 is provided with a second receiving groove 1201 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 to the bottom surface of the second housing 120 and penetrates the side surface of the second housing 120 facing the first housing 110.

[0092] ​​​When the foldable device 100 is in the unfolded state, i.e., the included angle between the first housing 110 and the second housing 120 is α, 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 housing 110, and part of the foldable mechanism 130 is installed in the second receiving groove 1201 of the second housing 120.

[0093] It should be noted that the "top", "bottom", "left", "right", "front" and "back" and other orientation words used in the description of the foldable terminal 1000 are mainly based on the display orientation of the foldable terminal 1000 in the accompanying drawings, and are described as "top" towards the positive direction of the Z axis, "bottom" towards the negative direction of the Z axis, "right" towards the positive direction of the X axis, "left" towards the negative direction of the X axis, "back" towards the positive direction of the Y axis, and "front" towards the negative direction of the Y axis. It does not limit the orientation of the foldable terminal 1000 in the actual application scenario. Figure 2

[0094] In the existing foldable mechanism, the pressing plate is generally assembled by multiple components, resulting in a large number of components of the pressing plate, complex assembly, and easy assembly precision problems, resulting in a complex structure of the foldable mechanism, which is not conducive to the lightweight design of the foldable terminal. Next, the structure of the foldable mechanism 130 in the foldable terminal 1000 shown in the embodiments of the present application will be described.

[0095] Please refer to Figure 5a , Figure 5b and Figure 6 , Figure 5a is a structural schematic diagram of the foldable mechanism 130 in the foldable device 100 shown in Figure 4 , Figure 5b is a structural schematic diagram of the foldable mechanism 130 shown in Figure 5a from another angle, Figure 6 is an exploded structural schematic diagram of the foldable mechanism 130 shown in Figure 5a .

[0096] ​The foldable mechanism 130 comprises a base 10, a connecting assembly 20, a damping assembly 30, a pressing plate assembly 40 and a flexible support plate 50. The connecting assembly 20 and the pressing plate assembly 40 are both mounted on the base 10 and can be folded or unfolded relative to the base 10, so as to be converted between the folded state and the unfolded state. The damping assembly 30 is mounted on the connecting assembly 20 and can be folded or unfolded relative to the base 10 under the driving of the connecting assembly 20, so as to be converted between the folded state and the unfolded state. The flexible support plate 50 is mounted on the pressing plate assembly 40 and can be folded or unfolded relative to the base 10 under the driving of the pressing plate assembly 40, so as to be converted between the folded state and the unfolded state. For example, the base 10 extends along the Y-axis direction.

[0097] In this embodiment, the connecting assembly 20 has three, and the three connecting assemblies 20 are arranged at intervals along the Y-axis direction. The three connecting assemblies 20 are respectively a first connecting assembly 20a, a second connecting assembly 20b and a third connecting assembly 20c, and the third connecting assembly 20c is 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 at the middle of the foldable mechanism 130. In other embodiments, the connecting assembly 20 can also have one, two or more than four, and the number of the connecting assembly 20 is not limited in this application.

[0098] The first connecting assembly 20a comprises 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 slidingly and rotationally connected to the base 10. The second main swing arm 24a is rotationally connected to the second fixed frame 22a and is slidingly and rotationally connected to the base 10. The first auxiliary swing arm 25a is slidingly connected to the first fixed frame 21a and is rotationally connected to the base 10. The second auxiliary swing arm 26a is slidingly connected to the second fixed frame 22a and is rotationally connected to the base 10.

[0099] When the first connecting assembly 20a is switched between the folded state and the unfolded state, the first fixed frame 21a, the first main swing arm 23a and the first auxiliary swing arm 25a rotate relative to the base 10 in a first direction, and the second fixed frame 22a, the second main swing arm 24a and the second auxiliary swing arm 26a rotate relative to the base 10 in a second direction opposite to the first direction.

[0100] For example, when the first connecting assembly 20a is switched from the folded state to the unfolded state, the first fixed frame 21a, the first main swing arm 23a and the first auxiliary swing arm 25a rotate relative to the base 10 in the counterclockwise direction, and the second fixed frame 22a, the second main swing arm 24a and the second auxiliary swing arm 26a rotate relative to the base 10 in the clockwise direction. When the first connecting assembly 20a is switched from the unfolded state to the folded state, the first main swing arm 23a and the first auxiliary swing arm 25a rotate relative to the base 10 in the clockwise direction, and the second main swing arm 24a and the second auxiliary swing arm 26a rotate relative to the base 10 in the counterclockwise direction.

[0101] It should be noted that the second connecting assembly 20b and the first connecting assembly 20a can be the same or similar assemblies, symmetrical or partially symmetrical structures, or different structures. The second connecting assembly 20b can be centrosymmetric to the first connecting assembly 20a. The basic structures of the components in the second connecting assembly 20b, the connection relationship between the components, and the connection relationship between the components and the components outside the assembly can be referred to the related designs of the first connecting assembly 20a. The second connecting assembly 20b and the first connecting assembly 20a can be different in the detailed structures or position arrangements of the components.

[0102] In the embodiment, the second connecting assembly 20b includes a first fixed frame 21b, a second fixed 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 and the connection relationship between the components and the base 10, the pressing plate assembly 40 and the damping assembly 30 can be referred to the related descriptions of the first connecting assembly 20a.

[0103] The third connecting assembly 20c includes a first fixed frame 21c, a second fixed frame 22c, a first main swing arm 23c and a second main swing arm 24c. The structures of the components of the third connecting assembly 20c and the connection relationship between the components and the base 10, the pressing plate assembly 40 and the damping assembly 30 can be referred to the related descriptions of the first connecting assembly 20a. In some other embodiments, the third connecting assembly 20c can also include a first auxiliary swing arm and a second auxiliary swing arm (not shown), which are not limited in the present application.

[0104] It should be noted that the first fixed frame 21a of the first connecting assembly 20a, the first fixed frame 21b of the second connecting assembly 20b and the first fixed frame 21c of the third connecting assembly 20c can be independent structural members or multiple parts of an integral structure. And / or, the second fixed frame 22a of the first connecting assembly 20a, the second fixed frame 22b of the second connecting assembly 20b and the second fixed frame 22c of the third connecting assembly 20c can be independent structural members or multiple parts of an integral structure.

[0105] It should be understood that "and / or" mentioned in the embodiments of the present application means both "and" and "or". For example, A and / or B includes three cases of only A existing, only B existing, and A and B existing simultaneously, and the description of "and / or" hereinafter can be understood in the same way.

[0106] In addition, the foldable mechanism 130 further comprises a synchronization piece 60, which is installed on the base 10 and in sliding connection with the connecting assembly 20. In the embodiment, the synchronization piece 60 is two, and the two synchronization pieces 60 are arranged apart from each other along the Y-axis direction. The two synchronization pieces 60 are respectively a first synchronization piece 60a and a second synchronization piece 60b. The first synchronization piece 60a is installed on the front side of the base 10 and in sliding connection with the first auxiliary swing arm 25a and the second auxiliary swing arm 26a, so as to make the first auxiliary swing arm 25a and the second auxiliary swing arm 26a rotate synchronously relative to the base 10. The second synchronization piece 60b is installed on the rear side of the base 10 and in sliding connection with the first auxiliary swing arm 25b and the second auxiliary swing arm 26b, so as to make the first auxiliary swing arm 25b and the second auxiliary swing arm 26b rotate synchronously relative to the base 10.

[0107] It should be noted that the second synchronization piece 60b and the first synchronization piece 60a can be the same or similar assembly, symmetrical or partially symmetrical structure, or different structure. Among them, the second synchronization piece 60b can be mirror-symmetrical with the first synchronization piece 60a. The basic structure of each component in the second synchronization piece 60b, the connection relationship between the components, and the connection relationship between the components and the components outside the assembly can be referred to the related design of the first synchronization piece 60a, and the second synchronization piece 60b and the first synchronization piece 60a can be different in the detailed structure or position arrangement of the components.

[0108] In the embodiment, the damping assembly 30 is two, and the two damping assemblies 30 are arranged 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, and the first damping assembly 30a is installed on the first connecting assembly 20a. In the process of folding or unfolding the first connecting assembly 20a relative to the base 10, the first damping assembly 30a can provide damping force. The second damping assembly 30b is installed on the second connecting assembly 20b. In the process of folding or unfolding the second connecting assembly 20b relative to the base 10, the second damping assembly 30b can provide damping force. The user can obviously feel the damping force provided by the first damping assembly 30a and the second damping assembly 30b in the process of using the foldable terminal 1000, such as when the foldable terminal 1000 is in the folded state or the unfolded state, and when the foldable terminal 1000 is switched between the folded state and the unfolded state. The user can experience a better hand feeling, thereby improving the user's experience.

[0109] In some other embodiments, the damping assembly 30 can also have three, three damping assemblies 30, respectively, a first damping assembly 30a, a second damping assembly 30b and a third damping assembly (not shown in the figure), the third damping assembly is installed on the third connecting assembly 20c. In the process of folding or unfolding the third connecting assembly 20c relative to the base 10, the third damping assembly can provide damping force. Alternatively, the damping assembly 30 can also have one or more than four, and the number of damping assemblies 30 is not limited in the application.

[0110] In the embodiment, the first damping assembly 30a includes a first damping member 31a and a second damping member 32a. The first damping member 31a is installed on the first fixed frame 21a and fixedly connected to the first auxiliary swing arm 25a, and can slide relative to the first fixed frame 21a under the driving of the first auxiliary swing arm 25a. The second damping member 32a is installed on the second fixed frame 22a and fixedly connected to the second auxiliary swing arm 26a, and can slide relative to the second fixed frame 22a under the driving of the second auxiliary swing arm 26a.

[0111] It should be noted that the second damping assembly 30b and the first damping assembly 30a can be the same or similar assembly, symmetrical or partially symmetrical structure, or different structure. Among them, the second damping assembly 30b can be mirror-symmetrical with the first damping assembly 30a. The basic structure of each component in the second damping assembly 30b, the connection relationship between the components, and the connection relationship between the components and the components outside the assembly can be referred to the related design of the first damping assembly 30a. The second damping assembly 30b and the first damping assembly 30a can be different in the detailed structure or position arrangement of the components.

[0112] In the embodiment, the second damping assembly 30b includes a first damping member 31b and a second damping member 32b. The first damping member 31b is installed on the first fixed frame 21b and fixedly connected to the first auxiliary swing arm 25b, and can slide relative to the first fixed frame 21b under the driving of the first auxiliary swing arm 25b. The second damping member 32b is installed on the second fixed frame 22b and fixedly connected to the second auxiliary swing arm 26b, and can slide relative to the second fixed frame 22b under the driving of the second auxiliary swing arm 26b. Among them, the structure of each component of the second damping assembly 30b, and the connection relationship between each component and the base 10, the second connecting assembly 20b and the pressing plate assembly 40 can be referred to the related description of the first damping assembly 30a.

[0113] The pressing plate assembly 40 is slidingly and rotatably connected with the connecting assembly 20. In the embodiment, the pressing plate assembly 40 comprises a first pressing plate 41, a second pressing plate 42, a first pressing plate swing arm 43 and a second pressing plate swing arm 44. The front side of the first pressing plate 41 is slidingly and rotatably connected with the first fixed frame 21a, the rear side of the first pressing plate 41 is slidingly and rotatably connected with the first fixed frame 21b, and the middle part of the first pressing plate 41 is slidingly and rotatably connected with the first fixed frame 21c. The front side of the second pressing plate 42 is slidingly and rotatably connected with the second fixed frame 22a, the rear side of the second pressing plate 42 is slidingly and rotatably connected with the second fixed frame 22b, and the middle part of the second pressing plate 42 is slidingly and rotatably connected with the second fixed frame 22c.

[0114] In the embodiment, the first pressing plate swing arm 43 and the second pressing plate swing arm 44 are both four. In the Y-axis direction, the four first pressing plate swing arms 43 are arranged at intervals, and the four second pressing plate swing arms 44 are arranged at intervals. In other embodiments, the first pressing plate swing arm 43 can also be one, two or more than four, and / or the second pressing plate swing arm 44 can also be one, two or more than four, and the number of the first pressing plate swing arm 43 and the second pressing plate swing arm 44 is not limited in the application.

[0115] Each first pressing plate swing arm 43 is slidingly connected with the first pressing plate 41 and slidingly and rotatably connected with the base 10. Each second pressing plate swing arm 44 is slidingly connected with the second pressing plate 42 and slidingly and rotatably connected with the base 10. In other embodiments, each first pressing plate swing arm 43 can also be rotatably connected with the base 10, and / or the second pressing plate swing arm 44 can also be rotatably connected with the base 10.

[0116] The flexible support plate 50 is installed on the first pressing plate swing arm 43 and the second pressing plate swing arm 44 and can be folded or unfolded relative to the first pressing plate swing arm 43 and the second pressing plate swing arm 44 to realize mutual conversion between the folded state and the unfolded state. The folding direction of the flexible support plate 50 is the Y-axis direction and is parallel to the rotation center of the first pressing plate swing arm 43 and the second pressing plate swing arm 44 relative to the base 10. It should be noted that the folding direction of the flexible support plate 50 is the Y-axis direction, which means that the flexible support plate 50 can be folded around the Y-axis direction.

[0117] Please refer to Figure 6 and Figure 7 , Figure 7 is Figure 6 the structure diagram of the base 10 in the foldable mechanism 130 shown in FIG. 13.

[0118] The base 10 comprises a shaft cover 11, a first support 12, a second support 13 and a third support 14, all of which are fixedly connected to the shaft cover 11. In the Y-axis direction, the third support 14 is located between the first support 12 and the second support 13, and is spaced apart from both the first support 12 and the second support 13.

[0119] In other embodiments, the base 10 can also be a one-piece structure, which can not only improve the overall strength of the base 10, but also reduce the number of components of the base 10, which is helpful for the lightweight design of the foldable mechanism 130.

[0120] In this embodiment, the shaft cover 11 comprises a front end portion 11a, a rear end portion 11b and a middle portion 11c, which are connected between the front end portion 11a and the rear end portion 11b. Specifically, in the Y-axis direction, the front end portion 11a, the middle portion 11c and the rear end portion 11b are arranged in sequence. Among them, the front end portion 11a, the rear end portion 11b and the middle portion 11c are integrally formed. That is, the shaft cover 11 is a one-piece structure. In other embodiments, the front end portion 11a, the rear end portion 11b and the middle portion 11c can also form an integrated structure by assembly. That is, the shaft cover 11 is an integrated structure formed by assembly.

[0121] The first support 12 and part of the third support 14 are fixedly connected to the front end portion 11a of the shaft cover 11, and together form the first part 10a of the base 10 with the front end portion 11a of the shaft cover 11. The second support 13 and part of the third support 14 are fixedly connected to the rear end portion 11b of the shaft cover 11, and together form the second part 10b of the base 10 with the rear end portion 11b of the shaft cover 11. Part of the third support 14 is fixedly connected to the middle portion 11c of the shaft cover 11, and together forms the third part 10c of the base 10 with the middle portion 11c of the shaft cover 11. Among them, the first part 10a of the base 10 is connected with the first connecting assembly 20a, the second part 10b of the base 10 is connected with the second connecting assembly 20b, and the third part 10c of the base 10 is connected with the third connecting assembly 20c.

[0122] Please refer to Figure 7 and Figure 8 , Figure 8 is Figure 7 the structural schematic diagram of the first part 10a of the base 10.

[0123] The front end portion 11a of the shaft cover 11 is provided with a mounting groove 111a, and the opening of the mounting groove 111a is located on the top surface (not marked in the figure) of the front end portion 11a. The mounting groove 111a is recessed from the top surface to the bottom surface (not marked in the figure) of the front end portion 11a in the direction of the negative Z-axis (as shown in the figure). Specifically, the mounting groove 111a is located in the middle of the front end portion 11a.

[0124] In addition, the front end portion 11a of the shaft cover 11 is further provided with positioning columns 112a, which are arranged on the groove bottom wall (not shown in the figure) of the mounting groove 111a. The positioning columns 112a extend along the positive direction of the Z axis from the groove bottom wall of the mounting groove 111a. For example, the positioning columns 112a are in the shape of a cylinder. In this embodiment, there are three positioning columns 112a, which are arranged in sequence and spaced apart along the Y axis. In other embodiments, the positioning columns 112a can also be in the shape of a square column or a special-shaped column, and / or there can be one, two, or more than four positioning columns 112a.

[0125] The first support 12 is provided with an avoidance groove 121 and a positioning hole 122. The opening of the avoidance groove 121 is located on the top surface of the first support 12. Specifically, the opening of the avoidance groove 121 is located in the middle region of the top surface of the first support 12. The avoidance groove 121 is recessed from the top surface to the bottom surface (negative direction of the Z axis shown in the figure) of the first support 12, and penetrates the front end surface and the rear end surface of the first support 12. In this embodiment, the avoidance groove 121 is an arc-shaped groove. That is, the groove bottom wall of the avoidance groove 121 is an arc-shaped surface.

[0126] The opening of the positioning hole 122 is located on the bottom surface (not shown in the figure) of the first support 12. The positioning hole 122 is recessed from the bottom surface to the top surface (positive direction of the Z axis shown in the figure) of the first support 12, and penetrates the groove bottom wall of the avoidance groove 121. In this embodiment, there are two positioning holes 122, which are arranged in sequence and spaced apart along the Y axis. Each positioning hole 122 is matched with one positioning column 112a. When the first support 12 is assembled with the front end portion 11a, the two positioning columns 112a can pass through the two positioning holes 122, so as to realize the positioning between the first support 12 and the shaft cover 11, and ensure the assembly precision between the first support 12 and the shaft cover 11.

[0127] The first support 12 is further provided with a first notch 123, a second notch 124, a third notch 125, and a fourth notch 126. The openings of the first notch 123, the second notch 124, the third notch 125, and the fourth notch 126 are all located on the top surface of the first support 12. The first notch 123, the second notch 124, the third notch 125, and the fourth notch 126 are all recessed from the top surface to the bottom surface (direction of the Z axis shown in the figure) of the first support 12, and penetrate the bottom surface of the first support 12 and the groove bottom wall of the avoidance groove 121. Specifically, the first notch 123 and the third notch 125 are both located on the left side of the first support 12, and both penetrate the left side surface of the first support 12. The second notch 124 and the fourth notch 126 are both located on the right side of the first support 12, and both penetrate the right side surface of the first support 12.

[0128] In the Y-axis direction, the first notch 123 and the second notch 124 are arranged in a spaced manner. In the X-axis direction, the first notch 123 and the second notch 124 are arranged in a partially overlapped manner. That is, the projections of the first notch 123 and the second notch 124 on the X-Z plane are partially overlapped. The first notch 123 and the second notch 124 partially reuse the space of the first support 12 in the X-axis direction, which helps to reduce the size of the first support 12 in the X-axis direction, the size of the foldable mechanism 130 in the X-axis direction, and the size of the foldable terminal 1000 in the X-axis direction, and thus helps to realize the miniaturization design of the foldable terminal 1000.

[0129] In other embodiments, the first notch 123 and the second notch 124 can also be arranged in a partially overlapped manner or a completely overlapped manner in the Y-axis direction, so as to reduce the size of the first support 12 in the Y-axis direction, or the first notch 123 and the second notch 124 can also be arranged in a spaced manner or a completely overlapped manner in the X-axis direction.

[0130] The third notch 125 is located on one side of the first notch 123 facing the positive direction of the Y-axis and is arranged in a spaced manner with the first notch 123. The fourth notch 126 is located on one side of the second notch 124 facing the positive direction of the Y-axis and is arranged in a spaced manner with the second notch 124. In the X-axis direction, the third notch 125 and the fourth notch 126 are arranged in a spaced and opposite manner. In the Y-axis direction, the third notch 125 and the fourth notch 126 are arranged in a completely overlapped manner. That is, the projections of the third notch 125 and the fourth notch 126 on the Y-Z plane are completely overlapped. The third notch 125 and the fourth notch 126 reuse the space of the first support 12 in the Y-axis direction, which helps to reduce the size of the first support 12 in the Y-axis direction, the size of the foldable mechanism 130 in the Y-axis direction, and the size of the foldable terminal 1000 in the Y-axis direction, and thus helps to realize the miniaturization design of the foldable terminal 1000.

[0131] In other embodiments, the third notch 125 and the fourth notch 126 can also be arranged in a partially overlapped manner or a completely overlapped manner in the X-axis direction, so as to reduce the size of the first support 12 in the X-axis direction, or the third notch 125 and the fourth notch 126 can also be arranged in a spaced manner or a partially overlapped manner in the Y-axis direction.

[0132] In addition, the first support 12 is further provided with a first sliding block 12a, a second sliding block 12b, a third sliding block 12c and a fourth sliding block 12d. The first sliding block 12a is two, and the two first sliding blocks 12a are respectively arranged on the two groove side walls of the first gap 123. One first sliding block 12a extends from the groove side wall of the first gap 123 along the negative direction of the Y axis, and the other first sliding block 12a extends from the groove side wall of the first gap 123 along the positive direction of the Y axis. Along the Y axis direction, the two first sliding blocks 12a are spaced and oppositely arranged. Among them, the two first sliding blocks 12a are both arc-shaped plates, and both are concave towards the negative direction of the Z axis. That is, the top surface (not marked in the figure) and the bottom surface (not marked in the figure) of the first sliding block 12a are both arc surfaces, and both are concave towards the negative direction of the Z axis. Illustratively, the axis of the two first sliding blocks 12a is parallel to the Y axis, and the coaxial centers are coaxial.

[0133] It should be noted that the "coaxial center" mentioned in the embodiments of the present application refers to the extension lines of the axis centers coinciding with each other. For example, A and B coaxial center means that the extension line of the axis center of A coincides with the extension line of the axis center of B, and the description of "coaxial center" hereinafter can be understood in the same way.

[0134] The second sliding block 12b, the third sliding block 12c and the fourth sliding block 12d are both two, and the two second sliding blocks 12b are respectively arranged on the two groove side walls of the second gap 124, the two third sliding blocks 12c are respectively arranged on the two groove side walls of the third gap 125, and the two fourth sliding blocks 12d are respectively arranged on the two groove side walls of the fourth gap 126. Among them, the structure of the second sliding block 12b, the third sliding block 12c and the fourth sliding block 12d can refer to the related description of the first sliding block 12a above, which will not be repeated here.

[0135] In addition, the first support 12 is further provided with a first rotating shaft hole (not shown) and a second rotating shaft hole 127, and the openings of the first rotating shaft hole and the second rotating shaft hole 127 are both located on the rear end surface of the first support 12. The first rotating shaft hole and the second rotating shaft hole 127 both extend from the rear end surface of the first support 12 along the positive direction of the Y axis. Specifically, the first rotating shaft hole is located on the left side of the first support 12, and the second rotating shaft hole 127 is located on the right side of the first support 12. Illustratively, the first rotating shaft hole and the second rotating shaft hole 127 are both circular holes, and the axis centers are both parallel to the Y axis direction.

[0136] In addition, the first support 12 is also provided with a mounting protrusion 12e, which is arranged on the rear end surface of the first support 12. Specifically, the mounting protrusion 12e is located between the first rotation shaft hole and the second rotation shaft hole 127, and is spaced apart from the first rotation shaft hole and the second rotation shaft hole 127. The mounting protrusion 12e extends along the negative direction of the Y axis from the rear end surface of the first support 12. The mounting protrusion 12e is provided with a mounting hole 128, and the opening of the mounting hole 128 is located on the rear end surface of the mounting protrusion 12e. The mounting hole 128 is recessed along the positive direction of the Y axis from the rear end surface of the mounting protrusion 12e. For example, the mounting hole 128 is a square hole. In other embodiments, the mounting hole 128 can also be a circular hole or other special-shaped hole.

[0137] In this embodiment, the first support 12 is fixedly connected to the front end portion 11a by a fastener (such as a screw, a pin, or a bolt, etc.). Specifically, the first support 12 is mounted in the mounting groove 111a and is located at a position away from the middle portion 11c. The first notch 123 and part of the mounting groove 111a jointly form the first sliding groove 101a, the second notch 124 and part of the mounting groove 111a jointly form the second sliding groove 102a, the third notch 125 and part of the mounting groove 111a jointly form the first matching groove 103a, and the fourth notch 126 and part of the mounting groove 111a jointly form the second matching groove 104a. In other embodiments, the first support 12 can also be fixedly connected to the front end portion 11a of the shaft cover 11 by bonding or welding, etc.

[0138] Please refer to Figure 7 and Figure 9 , Figure 9 is Figure 7 the structural schematic view of the second portion 10b of the base 10.

[0139] In this embodiment, the rear end portion 11b of the shaft cover 11 is centrally symmetric to the front end portion 11a of the shaft cover 11, which not only improves the symmetry of the shaft cover 11, but also simplifies the overall structure of the shaft cover 11 and reduces the machining cost of the shaft cover 11. It can be understood that the structural design of the rear end portion 11b of the shaft cover 11 can refer to the related schemes of the front end portion 11a of the shaft cover 11 (such as Figure 8 indicated), while allowing the rear end portion 11b of the shaft cover 11 to be slightly different from the front end portion 11a of the shaft cover 11 in the detailed structure or position arrangement of the parts. The rear end portion 11b of the shaft cover 11 is provided with a mounting groove 111b and a positioning column 112b.

[0140] In some other embodiments, the rear end portion 11b of the shaft cover 11 can also be mirror-symmetric to the front end portion 11a of the shaft cover 11, or the rear end portion 11b of the shaft cover 11 can also be partially symmetric to the front end portion 11a of the shaft cover 11, or the rear end portion 11b of the shaft cover 11 can also be identical or similar or different to the front end portion 11a of the shaft cover 11.

[0141] In the embodiment, the second support 13 is center-symmetric to the first support 12, which can not only improve the symmetry of the base 10, but also simplify the overall structure of the base 10 and reduce the processing cost of the base 10. It can be understood that the basic design of the component structure of the second support 13, the positional relationship design between the components, and the connection relationship design between the second support 13 and the rear end portion 11b of the shaft cover 11 can refer to the related solutions of the first support 12 (as shown in Figure 8 ), while allowing the second support 13 to be slightly different from the first support 12 in the detailed structure or positional arrangement of the components.

[0142] The second support 13 is provided with an avoiding groove 131, a positioning hole 132, a first notch 133, a second notch 134, a third notch 135, a fourth notch 136, a first rotating shaft hole, and a second rotating shaft hole (not shown in the figure). The first notch 133 and part of the mounting groove 111b jointly form the first sliding groove 101b. The second notch 134 and part of the mounting groove 111b jointly form the second sliding groove 102b. The third notch 135 and part of the mounting groove 111b jointly form the first matching groove 103b. The fourth notch 136 and part of the mounting groove 111b jointly form the second matching groove 104b. The openings of the first rotating shaft hole and the second rotating shaft hole are located on the front end face of the second support 13.

[0143] In addition, the second support 13 is also provided with a first sliding block 13a, a second sliding block 13b, a third sliding block 13c, a fourth sliding block 13d, and a mounting protrusion 13e. The mounting protrusion 13e is arranged on the front end face of the second support 13. The mounting protrusion 13e is provided with a mounting hole (not shown in the figure), and the opening of the mounting hole is located on the front end face of the mounting protrusion 13e.

[0144] In some other embodiments, the second support 13 can also be mirror-symmetric to the first support 12, or the second support 13 can also be partially symmetric to the first support 12, or the second support 13 can also be identical or similar or different to the first support 12.

[0145] Please refer to Figure 8 , Figure 9 and Figure 10 , Figure 10 is Figure 7 the structural schematic view of the third part 10c of the base 10 as shown.

[0146] In this embodiment, the middle part 11c of the shaft cover 11 is provided with a mounting groove 111c. It should be noted that the structure of the mounting groove 111c is substantially the same as that of the mounting groove 111a of the front end part 11a, and will not be described here. Among them, the mounting groove 111c of the middle part 11c can communicate the mounting grooves 111a of the front end part 11a and the mounting grooves 111b of the rear end part 11b.

[0147] The third support 14 is provided with an avoiding groove 141, a positioning hole 142, a first notch 143, a second notch 144, a third notch 145, a fourth notch 146, a first rotating shaft hole (not shown) and a second rotating shaft hole 147. It should be noted that the structures of the avoiding groove 141, the positioning hole 142, the first notch 143, the second notch 144, the third notch 145, the fourth notch 146, the first rotating shaft hole and the second rotating shaft hole 147 can be referred to the related descriptions of the avoiding groove 121, the positioning hole 122, the first notch 123 and the second notch 124 of the first support 12, and will not be described here.

[0148] Among them, the positioning hole 142 has two, one positioning hole 142 is located at the position of the third support 14 towards the first support 12, and the other positioning hole 142 is located at the position of the third support 14 towards the second support 13. When the third support 14 is assembled with the shaft cover 11, one positioning column 112a can pass through one positioning hole 142, and one positioning column 112b can pass through the other positioning hole 142, so as to realize the positioning between the third support 14 and the shaft cover 11, and ensure the assembly precision between the third support 14 and the shaft cover 11.

[0149] The third notch 145 and the fourth notch 146 each have two. Along the Y-axis direction, the two third notches 145 are respectively located at the opposite sides of the first notch 143, and the two fourth notches 146 are respectively located at the opposite sides of the second notch 144. Among them, the first notch 143 and part of the mounting groove 111c jointly form a first sliding groove 101c. The second notch 144 and part of the mounting groove 111c jointly form a second sliding groove 102c. Each third notch 145 and part of the mounting groove 111c jointly form a first matching groove 103c. Each fourth notch 146 and part of the mounting groove 111c jointly form a second matching groove 104c.

[0150] The first rotating shaft hole and the second rotating shaft hole 147 each have two. The openings of one first rotating shaft hole and one second rotating shaft hole are located at the front end face of the third support 14. The first rotating shaft hole is oppositely arranged with the first rotating shaft hole of the first support 12, and coaxial with the first rotating shaft hole of the first support 12. The second rotating shaft hole is oppositely arranged with the second rotating shaft hole 127, and coaxial with the second rotating shaft hole 127.

[0151] The openings of the other first rotating shaft hole and the other second rotating shaft hole are located on the rear end surface of the third support 14. The first rotating shaft hole is arranged opposite to the first rotating shaft hole of the second support 13 and coaxial with the first rotating shaft hole of the second support 13. The second rotating shaft hole is arranged opposite to the second rotating shaft hole 137 and coaxial with the second rotating shaft hole 137.

[0152] In addition, the third support 14 is further provided with a first sliding block 14a, a second sliding block 14b, a third sliding block 14c, a fourth sliding block 14d and a mounting protrusion 14e. In the present embodiment, the structures of the first sliding block 14a, the second sliding block 14b, the third sliding block 14c, the fourth sliding block 14d and the mounting protrusion 14e can be respectively referred to the relevant descriptions of the first sliding block 12a, the second sliding block 12b, the third sliding block 12c, the fourth sliding block 12d and the mounting protrusion 12e in the first support 12, which will not be repeated here.

[0153] Among them, the third sliding block 14c and the fourth sliding block 14d are both four. Every two third sliding blocks 14c are arranged on the two slot side walls of a third notch 145, and every two fourth sliding blocks 14d are arranged on the two slot side walls of a fourth notch 146. The mounting protrusion 14e has two. One mounting protrusion 14e is arranged on the front end surface of the third support 14, and the mounting hole (not shown in the figure) of the mounting protrusion 14e is arranged opposite to the mounting hole 128 of the mounting protrusion 12e. The other mounting protrusion 14e is arranged on the rear end surface of the third support 14, and the mounting hole 148 of the mounting protrusion 14e is arranged opposite to the mounting hole of the mounting protrusion 13e.

[0154] Please refer to Figure 8 , Figure 11 and Figure 12 , Figure 11 are Figure 6 the structural schematic diagram of the first connecting assembly 20a, the first damping assembly 30a and the first synchronization piece 60a in the foldable mechanism 130 shown in FIGS. Figure 12 are Figure 11 the structural schematic diagram of the first connecting assembly 20a, the first damping assembly 30a and the first synchronization piece 60a in another angle.

[0155] The first fixing frame 21a is provided with a receiving notch 211a, a mounting notch 212a, a sliding groove 213a, a first mounting groove 214a, a second mounting groove 215a, an avoiding groove 216a and a guide groove 217a. 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 penetrates the front end surface, the rear end surface and the right side surface of the first fixing frame 21a. In other embodiments, the receiving notch 211a can also not penetrate the front end surface of the first fixing frame 21a, and / or the receiving notch 211a can also not penetrate the rear end surface of the first fixing frame 21a, and / or the receiving notch 211a can also not penetrate the right side surface of the first fixing frame 21a.

[0156] The opening of the mounting notch 212a is located on the right side surface of the first fixing frame 21a. The mounting notch 212a is recessed from the right side surface to the left side surface of the first fixing frame 21a (the negative direction of the X-axis in the figure), and penetrates the bottom surface of the first fixing frame 21a and the groove bottom wall of the receiving notch 211a. In other embodiments, the mounting notch 212a can also not penetrate the bottom surface of the first fixing frame 21a.

[0157] The mounting notch 212a includes two groove side walls oppositely arranged and a groove bottom wall (not labeled in the figure) connected between the two groove side walls. Both of the two groove side walls of the mounting notch 212a are recessed with mounting holes (not labeled in the figure), and the mounting holes are recessed along the Y-axis direction. Among them, the two mounting holes are circular holes, and the two mounting holes have the same axis. For example, the axes of the two mounting holes are parallel to the Y-axis direction.

[0158] The groove bottom wall of the mounting notch 212a is convexly provided with a mounting boss (not labeled in the figure), and the mounting boss is spaced apart from the two groove side walls of the mounting notch 212a. The mounting boss is provided with a through hole (not labeled in the figure), and the through hole penetrates the mounting boss along the Y-axis direction. Among them, the through hole is a circular hole, and the through hole has the same axis as the two mounting holes. For example, the axis of the through hole is parallel to the Y-axis direction. In other embodiments, the groove bottom wall of the mounting notch 212a can also not be convexly provided with a mounting boss.

[0159] The sliding groove 213a is located on one side of the mounting notch 212a in the negative direction of the Y-axis and is spaced apart from the mounting notch 212a. The opening of the sliding groove 213a is located on the right side surface of the first fixing frame 21a. The sliding groove 213a is recessed from the right side surface to the left side surface of the first fixing frame 21a, and penetrates the left side surface of the first fixing frame 21a and the bottom surface of the first fixing frame 21a. For example, the cross section of the sliding groove 213a is square. In other embodiments, the cross section of the sliding groove 213a can also be a circular hole or a special-shaped hole, etc.

[0160] In the Y-axis direction, the first mounting groove 214a and the second mounting groove 215a are located on opposite sides of the sliding groove 213a and are in communication with the sliding groove 213a. The first mounting groove 214a is located on the side of the sliding groove 213a facing the positive direction of the Y-axis. The opening of the first mounting groove 214a is located on the bottom surface of the first fixed frame 21a. The first mounting groove 214a is recessed from the bottom surface of the first fixed frame 21a towards the top surface and penetrates the side wall of the sliding groove 213a. The bottom wall of the first mounting groove 214a is protruded with a first fixing block 218a extending from the bottom wall of the first mounting groove 214a in the negative direction of the Z-axis. For example, the first fixing block 218a is in the shape of a square block.

[0161] The second mounting groove 215a is located on the side of the sliding groove 213a facing the negative direction of the Y-axis. The structure of the second mounting groove 215a is substantially the same as that of the first mounting groove 214a, which will not be described again here. The bottom wall of the second mounting groove 215a is protruded with a second fixing block 219a. For example, the second fixing block 219a is in the shape of a square block.

[0162] The avoidance groove 216a is located on the side of the mounting gap 212a away from the sliding groove 213a and is spaced apart from the mounting gap 212a. The opening of the avoidance groove 216a is located on the right side surface of the first fixed frame 21a. The avoidance groove 216a is recessed from the right side surface of the first fixed frame 21a towards the left side surface and penetrates the bottom surface of the first fixed frame 21a and the bottom wall of the accommodation gap 211a. In addition, the bottom wall of the avoidance groove 216a is provided with a sliding hole 2161a extending in the negative direction of the X-axis and penetrating the left side surface of the first fixed frame 21a. For example, the sliding hole 2161a is a square hole.

[0163] In other embodiments, the avoidance groove 216a can also not penetrate the bottom surface of the first fixed frame 21a, and / or the avoidance groove 216a can also not penetrate the bottom wall of the accommodation gap 211a, and / or the bottom wall of the avoidance groove 216a can also not be provided with the sliding hole 2161a, or the sliding hole 2161a can also not penetrate the left side surface of the first fixed frame 21a.

[0164] The opening of the guide groove 217a is located on the bottom wall of the accommodation gap 211a. The guide groove 217a is recessed from the bottom wall of the accommodation gap 211a towards the bottom surface of the first fixed frame 21a (the negative direction of the Z-axis shown in the figure) and penetrates the left side surface of the first fixed frame 21a. The guide groove 217a is an arc-shaped groove. That is, the bottom wall of the guide groove 217a is an arc surface. In other embodiments, the guide groove 217a can also not penetrate the left side surface of the first fixed frame 21a.

[0165] In the embodiment, the guide slot 217a has two, one guide slot 217a is located on the side of the avoidance slot 216a away from the mounting gap 212a, and is arranged in the interval with the avoidance slot 216a, and also penetrates the top surface of the first fixed frame 21a and the front end surface of the first fixed frame 21a. The other guide slot 217a is located on the side of the sliding slot 213a away from the mounting gap 212a, and is arranged in the interval with the sliding slot 213a, and also penetrates the top surface of the first fixed frame 21a and the rear end surface of the first fixed frame 21a. In other embodiments, the guide slot 217a can also not penetrate the top surface of the first fixed frame 21a, and / or the guide slot 217a can also not penetrate the front end surface of the first fixed frame 21a, and / or the guide slot 217a can also not penetrate the rear end surface of the first fixed frame 21a.

[0166] In the embodiment, the first main swing arm 23a includes a rotating part 231a, a sliding part 232a and a connecting part 233a, and the connecting part 233a is connected between the rotating part 231a and the sliding part 232a. The rotating part 231a includes two sub-rotating parts 234a, and the two sub-rotating parts 234a are arranged in the interval along the Y-axis direction. Each sub-rotating part 234a is provided with a through hole (not marked in the figure), and the through hole penetrates the sub-rotating part 234a along the Y-axis direction.

[0167] The structure of the rotating part 231a is matched with the structure of the mounting gap 212a. In addition, the first connecting assembly 20a further includes a first pin shaft 271a, and the first pin shaft 271a can be arranged in the through hole of the two sub-rotating parts 234a. Specifically, the first pin shaft 271a can be installed in the mounting gap 212a. The first pin shaft 271a can be arranged in the through hole of the mounting boss in the mounting gap 212a. The two ends of the first pin shaft 271a are respectively installed in the mounting holes of the two slot side walls of the mounting gap 212a, and are respectively fixedly connected to the hole walls of the two mounting holes. In the embodiment, the first pin shaft 271a is a circular shaft, and the axis of the first pin shaft 271a is parallel to the Y-axis direction. The two sub-rotating parts 234a can rotate relative to the first pin shaft 271a to realize the rotating connection between the rotating part 231a and the first pin shaft 271a, and further realize the rotating connection between the first main swing arm 23a and the first fixed frame 21a.

[0168] The connecting portion 233a is in a planar plate shape. The structure of the sliding portion 232a is adapted to the structure of the first sliding groove 101a. In this embodiment, the bottom surface of the sliding portion 232a is in an arc shape. The sliding portion 232a is provided with two first sliding grooves 235a, and the opening of one first sliding groove 235a is located at the front end surface of the sliding portion 232a, and the opening of the other first sliding groove 235a is located at the rear end surface of the sliding portion 232a. Both of the two first sliding grooves 235a are recessed along the Y-axis direction and penetrate through the top surface of the sliding portion 232a. Among them, each first sliding groove 235a is an arc-shaped groove adapted to the first sliding block 12a, and the axis of each first sliding groove 235a is parallel to the Y-axis direction.

[0169] The two first sliding blocks 12a can be respectively installed in the two first sliding grooves 235a and can slide and rotate in the first sliding grooves 235a, so that the sliding portion 232a can be installed in the first sliding groove 101a and can slide and rotate in the first sliding groove 101a, to realize the sliding and rotating connection between the sliding portion 232a and the base 10, and further realize the sliding and rotating connection between the first main swing arm 23a and the base 10. Among them, each first sliding block 12a is coaxial with one first sliding groove 235a.

[0170] In this embodiment, the first auxiliary swing arm 25a includes a sliding portion 251a, a rotating portion 252a, and a connecting portion 253a connected between the rotating portion 252a and the sliding portion 251a. The sliding portion 251a is in a planar plate shape. The bottom surface of the sliding portion 251a is provided with a third fixing block 254a extending along the negative direction of the Z-axis. Among them, the third fixing block 254a is arranged in the middle region of the bottom surface of the sliding portion 251a. For example, the third fixing block 254a is in a square block shape.

[0171] The structure of the sliding portion 251a is adapted to the structure of the sliding groove 213a. The sliding portion 251a can be installed in the sliding groove 213a and can slide relative to the first fixing frame 21a in the sliding groove 213a, to realize the sliding connection between the sliding portion 251a and the first fixing frame 21a, and further realize the sliding connection between the first auxiliary swing arm 25a and the first fixing frame 21a.

[0172] In this embodiment, the rotating portion 252a is in a cylindrical shape. The rotating portion 252a is provided with a through hole (not marked in the figure) and a first spiral groove 255a. Along the Y-axis direction, the through hole penetrates through the rotating portion 252a. The first spiral groove 255a is located on the side of the rotating portion 252a away from the connecting portion 253a. Among them, the first spiral groove 255a extends in a curved manner around the axis of the rotating portion 252a.

[0173] The structure of the rotating portion 252a is adapted to the structure of the first matching groove 103a. In addition, the first connecting assembly 20a further comprises a first rotating shaft 281a which is arranged through the through hole of the rotating portion 252a. Specifically, the first rotating shaft 281a can be mounted in the mounting groove 111a. One end of the first rotating shaft 281a is mounted in the first rotating shaft hole of the first support 12, and the other end is mounted in the first rotating shaft hole of the third support 14. The rotating portion 252a can rotate relative to the first rotating shaft 281a to realize the rotating connection between the rotating portion 252a and the base 10, and further realize the rotating connection between the first auxiliary swing arm 25a and the base 10.

[0174] In the embodiment, the first rotating shaft 281a is a circular shaft, the axis of the first rotating shaft 281a is parallel to the Y-axis direction, and is coaxial with the rotating portion 252a. At this time, the rotation center of the rotating portion 252a of the first auxiliary swing arm 25a relative to the base 10 is the axis of the first rotating shaft 281a. That is, the rotation center of the first auxiliary swing arm 25a relative to the base 10 is the axis of the first rotating shaft 281a.

[0175] The second fixing frame 22a is provided with a receiving gap 221a, a mounting gap 222a, a sliding groove 223a, a first mounting groove 224a, a second mounting groove 225a, an avoiding groove 226a and a guide groove 227a. The structures of the receiving gap 221a, the mounting gap 222a, the sliding groove 223a, the first mounting groove 224a, the second mounting groove 225a, the avoiding groove 226a and the guide groove 227a can be referred to the related descriptions of the receiving gap 211a, the mounting gap 212a, the sliding groove 213a, the first mounting groove 214a, the second mounting groove 215a, the avoiding groove 216a and the guide groove 217a in the first fixing frame 21a, which will not be repeated here.

[0176] The receiving gap 221a also penetrates the left side surface of the second fixing frame 22a. The openings of the mounting gap 222a and the sliding groove 223a are located on the left side surface of the second fixing frame 22a. The groove bottom wall of the first mounting groove 224a is provided with a first fixing block 228a, and the groove bottom wall of the second mounting groove 225a is provided with a second fixing block 229a. The opening of the avoiding groove 226a is located on the left side surface of the second fixing frame 22a, and the groove bottom wall of the avoiding groove 226a is provided with a sliding hole 2261a which extends along the positive direction of the X-axis and penetrates the right side surface of the second fixing frame 22a.

[0177] The second main swing arm 24a comprises a rotating portion 241a, a sliding portion 242a and a connecting portion 243a which is connected between the rotating portion 241a and the sliding portion 242a. The structure of the second main swing arm 24a can be referred to the related descriptions of the first main swing arm 23a above, which will not be repeated here.

[0178] The rotating part 241a comprises two sub-rotating parts 244a. The structure of the rotating part 241a is matched with the structure of the mounting gap 222a. In addition, the first connecting assembly 20a further comprises a second pin shaft 272a, which can be arranged in the through hole (not shown in figure) of the two sub-rotating parts 244a. Specifically, the second pin shaft 272a can be mounted in the mounting gap 222a. The second pin shaft 272a is a circular shaft, and the axis of the second pin shaft 272a is parallel to the Y-axis direction. The two sub-rotating parts 244a can rotate relative to the second pin shaft 272a to realize the rotational connection between the rotating part 241a and the second pin shaft 272a, and further realize the rotational connection between the second main swing arm 24a and the second fixed frame 22a.

[0179] The structure of the sliding part 242a is matched with the structure of the second sliding groove 102a. The sliding part 242a is provided with two second sliding grooves 245a, each of which is an arc-shaped groove matched with the second sliding block 12b. The two second sliding blocks 12b can be respectively mounted in the two second sliding grooves 245a and can slide and rotate in the second sliding grooves 245a, so that the sliding part 242a can be mounted in the second sliding groove 102a and can slide and rotate in the second sliding groove 102a to realize the sliding and rotational connection between the sliding part 242a and the base 10, and further realize the sliding and rotational connection between the second main swing arm 24a and the base 10. Each second sliding block 12b is coaxial with one second sliding groove 245a.

[0180] The second auxiliary swing arm 26a comprises a sliding part 261a, a rotating part 262a and a connecting part 263a connected between the rotating part 262a and the sliding part 261a. The structure of the second auxiliary swing arm 26a can be referred to the related description of the first auxiliary swing arm 25a above, which will not be repeated here.

[0181] The bottom surface of the sliding part 261a is provided with a third fixed block 264a. The structure of the sliding part 261a is matched with the structure of the sliding groove 223a. The sliding part 261a can be mounted in the sliding groove 223a and can slide relative to the second fixed frame 22a in the first sliding groove 223a to realize the sliding connection between the sliding part 261a and the second fixed frame 22a, and further realize the sliding connection between the second auxiliary swing arm 26a and the second fixed frame 22a.

[0182] The rotating part 262a is provided with a through hole (not labeled in the figure) and a second helical groove 265a. The rotating part 262a is adapted to the structure of the second matching groove 104a. In addition, the first connecting assembly 20a further comprises a second rotating shaft 282a which is arranged through the through hole of the rotating part 262a. Specifically, the second rotating shaft 282a can be installed in the mounting groove 111a and is arranged in parallel and spaced apart with the first rotating shaft 281a. Wherein, one end of the second rotating shaft 282a is installed in the second rotating shaft hole 127 of the first support 12, and the other end is installed in the second rotating shaft hole of the third support 14. The rotating part 262a can rotate relative to the second rotating shaft 282a to realize the rotating connection between the rotating part 262a and the base 10, and further realize the rotating connection between the second auxiliary swing arm 26a and the base 10.

[0183] Wherein, the second rotating shaft 282a is a circular shaft, and the axis of the second rotating shaft 282a is parallel to the Y-axis direction. At this time, the rotation center of the second auxiliary swing arm 26a relative to the base 10 is the axis of the second rotating shaft 282a. That is, the rotation center of the second auxiliary swing arm 26a relative to the base 10 is the axis of the second rotating shaft 282a.

[0184] In the process of switching the first connecting assembly 20a between the folded state and the unfolded state, when the first fixed frame 21a rotates relative to the base 10, the first fixed frame 21a drives the first main swing arm 23a to rotate relative to the first fixed frame 21a, and drives the first main swing arm 23a to slide and rotate relative to the base 10, and further drives the first auxiliary swing arm 25a to slide relative to the first fixed frame 21a, and drives the first auxiliary swing arm 25a to rotate relative to the base 10. Similarly, when the second fixed frame 22a rotates relative to the base 10, the second fixed frame 22a drives the second main swing arm 24a to rotate relative to the second fixed frame 22a, and drives the second main swing arm 24a to slide and rotate relative to the base 10, and further drives the second auxiliary swing arm 26a to slide relative to the second fixed frame 22a, and drives the second auxiliary swing arm 26a to rotate relative to the base 10.

[0185] The first damping member 31a comprises a first fixed part 311a, a second fixed part 312a, a third fixed part 313a, a first connecting part 314a and a second connecting part 315a. The third fixed part 313a is located between the first fixed part 311a and the second fixed part 312a and is arranged in spaced apart with the first fixed part 311a and the second fixed part 312a. The first connecting part 314a is fixedly connected between the first fixed part 311a and the third fixed part 313a. The second connecting part 315a is fixedly connected between the second fixed part 312a and the third fixed part 313a. Wherein, the first damping member 31a is an integrally formed structure.

[0186] The first fixed part 311a is provided with a first fixed hole 316a penetrating the first fixed part 311a along the thickness direction of the first fixed part 311a. The second fixed part 312a is provided with a second fixed hole 317a penetrating the second fixed part 312a along the thickness direction of the second fixed part 312a. The third fixed part 313a is provided with a third fixed hole 318a penetrating the third fixed part 313a along the thickness direction of the third fixed part 313a.

[0187] Specifically, the first fixed part 311a is installed in the first mounting groove 214a, and the second fixed part 312a is installed in the second mounting groove 215a, so as to realize the assembly between the first damping member 31a and the first fixed frame 21a. The third fixed part 313a is fixedly connected to the sliding part 251a of the first auxiliary swing arm 25a, so as to realize the fixed connection between the first damping member 31a and the first auxiliary swing arm 25a. The first fixed block 218a is installed in the first fixed hole 316a, the second fixed block 219a is installed in the second fixed hole 317a, and the third fixed block 254a is installed in the third fixed hole 318a.

[0188] When the first auxiliary swing arm 25a slides relative to the first fixed frame 21a, the sliding part 251a drives the third fixed part 313a to move relative to the first fixed part 311a and the second fixed part 312a, and the first connecting part 314a and the second connecting part 315a are deformed to generate damping force. During the folding or unfolding of the foldable terminal 1000, the user can feel the damping force generated by the deformation of the first connecting part 314a and the second connecting part 315a, and the user can experience a better hand feeling, thereby improving the user's experience.

[0189] The second damping member 32a includes a first fixed part 321a, a second fixed part 322a, a third fixed part 323a, a first connecting part 324a, and a second connecting part 325a. The first fixed part 321a, the second fixed part 322a, the third fixed part 323a, the first connecting part 324a, and the second connecting part 325a can be respectively referred to the related descriptions of the first fixed part 311a, the second fixed part 312a, the third fixed part 313a, the first connecting part 314a, and the second connecting part 315a of the first damping member 31a described above, and will not be repeated here.

[0190] Specifically, the first fixed part 321a is installed in the first mounting slot 224a, and the second fixed part 322a is installed in the second mounting slot 225a, so as to realize the assembly between the second damping part 32a and the second fixed frame 22a. The third fixed part 323a is fixedly connected to the sliding part 261a of the second auxiliary swing arm 26a, so as to realize the fixed connection between the second damping part 32a and the second auxiliary swing arm 26a. Among them, the first fixed block 228a is installed in the first fixed hole 326a, the second fixed block 229a is installed in the second fixed hole 327a, and the third fixed block 264a is installed in the third fixed hole 328a.

[0191] When the second auxiliary swing arm 26a slides relative to the second fixed frame 22a, the sliding part 251a drives the third fixed part 323a to move relative to the first fixed part 321a and the second fixed part 322a, and the first connecting part 324a and the second connecting part 325a are deformed to generate damping force. During the folding or unfolding of the foldable terminal 1000, the user can feel the damping force generated by the deformation of the first connecting part 324a and the second connecting part 325a, and the user can experience a better hand feeling, thereby improving the user's experience.

[0192] When the first connecting assembly 20a switches between the folded state and the unfolded state, the first fixed frame 21a, the second fixed frame 22a, the first auxiliary swing arm 25a and the second auxiliary swing arm 26a all rotate relative to the base 10, thereby driving the first damping part 31a and the second damping part 32a to rotate relative to the base 10, so that the first damping assembly 30a switches between the folded state and the unfolded state.

[0193] In the foldable mechanism 130 shown in the embodiment, the first damping assembly 30a installed in the first connecting assembly 20a is used to provide damping force in the folding process and the unfolding process. Compared with the commonly used damping mechanism that uses springs and cams to provide damping, the first damping assembly 30a shown in the embodiment not only has fewer parts and is easy to assemble, but also can reduce the cost of the foldable mechanism 130 and simplify the structure of the foldable mechanism 130. Moreover, the first damping assembly 30a can be directly installed in the first connecting assembly 20a, without being installed in the base 10, so that the first damping assembly 30a does not need to occupy the space of the base 10, which is helpful to realize the lightweight design of the foldable mechanism 130.

[0194] In other embodiments, the first damping assembly 30a can also use springs and cams to provide damping force in the folding process and the unfolding process of the foldable mechanism 130, and the present application does not make specific limitation thereon.

[0195] The first synchronization member 60 includes a fixed column 61a and a synchronization slider 62a sleeved on the fixed column 61a and slidable relative to the fixed column 61a. The synchronization slider 62a is provided with a first cam 63a and a second cam 64a located at opposite sides of the synchronization slider 62a respectively. The first cam 63a is adapted in structure to the first helical groove 255a, and the second cam 64a is adapted in structure to the second helical groove 265a.

[0196] The first synchronization member 60a is installed in the installation groove 111a. Specifically, one end of the fixed column 61a is installed in the installation hole 128 of the installation protrusion 12e, and the other end is installed in the installation hole of the installation protrusion 14e. The first cam 63a is installed in the first helical groove 255a and is slidable relative to the rotating part 252a in the first helical groove 255a. The second cam 64a is installed in the second helical groove 265a and is slidable relative to the rotating part 262a in the second helical groove 265a.

[0197] When the first sub-swing arm 25a rotates relative to the base 10, the rotating part 252a drives the first cam 63a to slide in the first helical groove 255a, so as to drive the synchronization slider 62a to slide relative to the fixed column 61a, thereby driving the second cam 64a to slide relative to the rotating part 262a in the second helical groove 265a, and further driving the second sub-swing arm 26a to rotate relative to the base 10, so as to realize the synchronous rotation between the first sub-swing arm 25a and the second sub-swing arm 26a. Similarly, when the second sub-swing arm 26a rotates relative to the base 10, the first synchronization member 60a can drive the first sub-swing arm 25a to rotate relative to the base 10, so as to realize the synchronous rotation between the first sub-swing arm 25a and the second sub-swing arm 26a.

[0198] In the foldable mechanism 130 shown in the embodiment, the helical groove and the cam are matched to realize the synchronous transmission. Compared with the commonly used gear to realize the synchronous transmission, the number of parts of the foldable mechanism 130 is reduced, the assembly error between the parts is avoided, the cost of the foldable mechanism 130 is reduced, and the thickness dimension (i.e. the dimension along the Z-axis direction) of the first synchronization member 60a is smaller, which is helpful to reduce the thickness dimension of the foldable mechanism 130 and realize the lightweight design of the foldable mechanism 130.

[0199] In other embodiments, a synchronization assembly including a gear can also be used to realize the synchronous transmission, which is not limited in the application.

[0200] Please refer to Figure 9 , Figure 13 and Figure 14 , Figure 13 is Figure 6Structure diagram of the second connecting assembly 20b, the second damping assembly 30b and the second synchronizer 60b in the foldable mechanism 130 shown, Figure 14 is Figure 13 Structure diagram of the second connecting assembly 20b, the second damping assembly 30b and the second synchronizer 60b shown from another angle.

[0201] The first fixed frame 21b is provided with a receiving notch 211b, a mounting notch 212b, a sliding groove 213b, a first mounting groove 214b, a second mounting groove 215b, an avoiding groove 216b and a guide groove 217b. The structures of the receiving notch 211b, the mounting notch 212b, the sliding groove 213b, the first mounting groove 214b, the second mounting groove 215b, the avoiding groove 216b and the guide groove 217b can be referred to the relevant descriptions of the receiving notch 211a, the mounting notch 212a, the sliding groove 213a, the first mounting groove 214a, the second mounting groove 215a, the avoiding groove 216a and the guide groove 217a in the first fixed frame 21a (as shown in Figure 11 and Figure 12 ).

[0202] The sliding groove 213b is located on one side of the mounting notch 212b facing the positive direction of the Y-axis. The groove bottom wall of the first mounting groove 214b is provided with a first fixed block 218b, and the groove bottom wall of the second mounting groove 215b is provided with a second fixed block 219b. The avoiding groove 216b is located on one side of the mounting notch 212b facing the negative direction of the Y-axis. The groove bottom wall of the avoiding groove 216b is provided with a sliding hole 2161b.

[0203] The first main swing arm 23b includes a rotating part 231b, a sliding part 232b and a connecting part 233b connected between the rotating part 231b and the sliding part 232b. The structure of the first main swing arm 23b can be referred to the relevant descriptions of the first main swing arm 23a (as shown in Figure 11 and Figure 12 ).

[0204] The rotating part 231b includes two sub-rotating parts 234b. The structure of the rotating part 231b is matched with the structure of the mounting notch 212b. In addition, the second connecting assembly 20b further includes a first pin shaft 271b which can be penetrated into the through holes (not shown in the figure) of the two sub-rotating parts 234b. Specifically, the first pin shaft 271b can be installed in the mounting notch 212b. The first pin shaft 271b is a round shaft, the axis of the first pin shaft 271b is parallel to the Y-axis direction, and the axis of the first pin shaft 271b is the same as the axis of the first pin shaft 271a (as shown in Figure 11 and Figure 12(As shown) Coaxial. The two sub-rotating parts 234b can rotate relative to the first pin 271b to realize the rotational connection between the rotating parts 231b and the first pin 271b, thereby realizing the rotational connection between the first main swing arm 23b and the first fixed frame 21b.

[0205] The structure of the sliding part 232b is adapted to the structure of the first sliding groove 101b. The sliding part 232b has two first sliding grooves 235b, each of which is an arc-shaped groove adapted to the first slider 13a. The two first sliders 13a can be respectively installed in the two first sliding grooves 235b and can slide and rotate within the first sliding grooves 235b. Thus, the sliding part 232b can be installed in the first sliding groove 101b and can slide and rotate within the first sliding groove 101b, thereby achieving a sliding and rotating connection between the sliding part 232b and the base 10, and further achieving a sliding and rotating connection between the first main swing arm 23b and the base 10. Each first slider 13a is coaxial with one of the first sliding grooves 235b.

[0206] The first auxiliary swing arm 25b includes a sliding part 251b, a rotating part 252b, and a connecting part 253b, with the connecting part 253b connecting the rotating part 252b and the sliding part 251b. The structure of the first auxiliary swing arm 25b can be referenced from the above description of the first auxiliary swing arm 25b (e.g., Figure 11 and Figure 12 The relevant descriptions (as shown) will not be repeated here.

[0207] A third fixing block 254b protrudes from the bottom surface of the sliding part 251b. The structure of the sliding part 251b is adapted to the structure of the slide groove 213b. The sliding part 251b can be installed in the slide groove 213b and can slide relative to the first fixing frame 21b within the slide groove 213b to realize the sliding connection between the sliding part 251b and the first fixing frame 21b, thereby realizing the sliding connection between the first auxiliary swing arm 25b and the first fixing frame 21b.

[0208] The rotating part 252b is provided with a through hole (not shown in the figure) and a first spiral groove 255b. The structure of the rotating part 252b is adapted to the first mating groove 103b. In addition, the second connecting assembly 20b also includes a first rotating shaft 281b, which can pass through the through hole of the rotating part 252b. Specifically, the first rotating shaft 281b can be installed in the mounting groove 111b. One end of the first rotating shaft 281b is installed in the first rotating shaft hole of the third bracket 14, and the other end is installed in the first rotating shaft hole of the second bracket 13. The rotating part 252b can rotate relative to the first rotating shaft 281b to realize the rotational connection between the rotating part 252b and the base 10, thereby realizing the rotational connection between the first auxiliary swing arm 25b and the base 10.

[0209] The first rotating shaft 281b is a circular shaft, the axis of the first rotating shaft 281b is parallel to the Y-axis direction, and is coaxial with the first rotating shaft 281a (as shown in Figure 11 and Figure 12 The rotating center of the first auxiliary swing arm 25b relative to the base 10 is the axis of the first rotating shaft 281b. That is, the rotating center of the first auxiliary swing arm 25b relative to the base 10 is the axis of the first rotating shaft 281b.

[0210] The second fixing frame 22b is provided with a receiving gap 221b, a mounting gap 222b, a sliding groove 223b, a first mounting groove 224b, a second mounting groove 225b, an avoiding groove 226b, and a guide groove 227b. The structures of the receiving gap 221b, the mounting gap 222b, the sliding groove 223b, the first mounting groove 224b, the second mounting groove 225b, the avoiding groove 226b, and the guide groove 227b can be referred to the related descriptions of the receiving gap 211b, the mounting gap 212b, the sliding groove 213b, the first mounting groove 214b, the second mounting groove 215b, the avoiding groove 216b, and the guide groove 217b in the first fixing frame 21b, and will not be repeated here.

[0211] The receiving gap 221b also penetrates the left side surface of the second fixing frame 22b. The openings of the mounting gap 222b and the sliding groove 223b are located on the left side surface of the second fixing frame 22b. The groove bottom wall of the first mounting groove 224b is provided with a first fixing block 228b, and the groove bottom wall of the second mounting groove 225b is provided with a second fixing block 229b. The opening of the avoiding groove 226b is located on the left side surface of the second fixing frame 22b, and the groove bottom wall of the avoiding groove 226b is provided with a sliding hole 2261b, which extends along the positive direction of the X-axis and penetrates the right side surface of the second fixing frame 22b.

[0212] The second main swing arm 24b includes a rotating part 241b, a sliding part 242b, and a connecting part 243b connected between the rotating part 241b and the sliding part 242b. The structure of the second main swing arm 24b can be referred to the related descriptions of the first main swing arm 23b above, and will not be repeated here.

[0213] The rotating part 241b includes two sub-rotating parts 244b. The structure of the rotating part 241b is matched with the structure of the mounting gap 222b. In addition, the second connecting assembly 20b further includes a second pin shaft 272b, which can be penetrated into the through holes (not shown in the figure) of the two sub-rotating parts 244b. Specifically, the second pin shaft 272b can be installed in the mounting gap 222b. The second pin shaft 272b is a circular shaft, the axis of the second pin shaft 272b is parallel to the Y-axis direction, and is coaxial with the second pin shaft 272a (as shown in Figure 11 and Figure 12The two sub-rotation portions 244b are rotatable relative to the second pin shaft 272b to achieve the rotational connection between the rotation portion 241b and the second pin shaft 272b, and further achieve the rotational connection between the second main swing arm 24b and the second fixed frame 22b.

[0214] The structure of the sliding portion 242b is adapted to the structure of the second sliding groove 102b. The sliding portion 242b is provided with two second sliding grooves 245b, each of which is an arc-shaped groove adapted to the second sliding block 13b. The two second sliding blocks 13b can be respectively installed in the two second sliding grooves 245b and can slide and rotate in the second sliding grooves 245b, so that the sliding portion 242b can be installed in the second sliding groove 102b and can slide and rotate in the second sliding groove 102b to achieve the sliding and rotational connection between the sliding portion 242b and the base 10, and further achieve the sliding and rotational connection between the second main swing arm 24b and the base 10. Each of the second sliding blocks 13b is coaxial with one of the second sliding grooves 245b.

[0215] The second sub-swing arm 26b includes a sliding portion 261b, a rotation portion 262b, and a connecting portion 263b connected between the rotation portion 262b and the sliding portion 261b. The structure of the second sub-swing arm 26b can be referred to the related description of the first sub-swing arm 25b above, which will not be repeated here.

[0216] The bottom surface of the sliding portion 261b is provided with a third fixed block 264b. The structure of the sliding portion 261b is adapted to the structure of the sliding groove 223b. The sliding portion 261b can be installed in the sliding groove 223b and can slide relative to the second fixed frame 22b in the first sliding groove 223b to achieve the sliding connection between the sliding portion 261b and the second fixed frame 22b, and further achieve the sliding connection between the second sub-swing arm 26b and the second fixed frame 22b.

[0217] The rotation portion 262b is provided with a through hole (not labeled in the figure) and a second spiral groove 265b. The structure of the rotation portion 262b is adapted to the structure of the second matching groove 104b. In addition, the second connecting assembly 20b further includes a second rotation shaft 282b which is arranged through the through hole of the rotation portion 262b. Specifically, the second rotation shaft 282b can be installed in the installation groove 111b and is arranged in parallel and spaced apart with the first rotation shaft 281a. One end of the second rotation shaft 282b is installed in the second rotation shaft hole 147 of the third support 14, and the other end is installed in the second rotation shaft hole of the second support 13. The rotation portion 262b is rotatable relative to the second rotation shaft 282b to achieve the rotational connection between the rotation portion 262b and the base 10, and further achieve the rotational connection between the second sub-swing arm 26b and the base 10.

[0218] The second rotating shaft 282b is a circular shaft, the axis of the second rotating shaft 282b is parallel to the Y-axis direction, and the axis of the second rotating shaft 282b is coaxial with the axis of the second rotating shaft 282a (as shown in Figure 11 and Figure 12 ). At this time, the rotation center of the second sub-swing arm 26b relative to the base 10 is the axis of the second rotating shaft 282b. That is, the rotation center of the second sub-swing arm 26b relative to the base 10 is the axis of the second rotating shaft 282b.

[0219] When the first fixed frame 21b and the second fixed frame 22b rotate relative to the base 10, the first fixed frame 21b drives the first main swing arm 23b to rotate relative to the first fixed frame 21b, and drives the first main swing arm 23b to slide and rotate relative to the base 10, and drives the first sub-swing arm 25a to slide relative to the first fixed frame 21b, and drives the first sub-swing arm 25a to rotate relative to the base 10. The second fixed frame 22b drives the second main swing arm 24b to rotate relative to the second fixed frame 22b, and drives the second main swing arm 24b to slide and rotate relative to the base 10, and drives the second sub-swing arm 26a to slide relative to the second fixed frame 22b, and drives the second sub-swing arm 26a to rotate relative to the base 10, so as to realize the mutual switching of the second connecting assembly 20b between the folded state and the flat state.

[0220] In this embodiment, the second damping assembly 30b has the same structure as the first damping assembly 30a (as shown in Figure 11 and Figure 12 ). The first damping member 31b includes a first fixed part 311b, a second fixed part 312b, a third fixed part 313b, a first connecting part 314b, and a second connecting part 315b. Among them, the first fixed part 311b, the second fixed part 312b, the third fixed part 313b, the first connecting part 314b, and the second connecting part 315b can refer to the related description of the first fixed part 311a, the second fixed part 312a, the third fixed part 313a, the first connecting part 314a, and the second connecting part 315a (as shown in Figure 11 and Figure 12 ) of the first damping member 31a above, which will not be repeated here.

[0221] Specifically, the first fixed part 311b is installed in the first mounting slot 214b, and the second fixed part 312b is installed in the second mounting slot 215b, so as to realize the assembly between the first damping member 31b and the first fixed frame 21b. The third fixed part 313b is fixedly connected to the sliding part 251b of the first sub-swing arm 25b, so as to realize the fixed connection between the first damping member 31b and the first sub-swing arm 25b. Among them, the first fixed block 218b is installed in the first fixed hole 316b, the second fixed block 219b is installed in the second fixed hole 317b, and the third fixed block 254b is installed in the third fixed hole 318b.

[0222] The second damping member 32b comprises a first fixed part 321b, a second fixed part 322b, a third fixed part 323b, a first connecting part 324b and a second connecting part 325b. The first fixed part 321b, the second fixed part 322b, the third fixed part 323b, the first connecting part 324b and the second connecting part 325b can refer to the relevant description of the first fixed part 311b, the second fixed part 312b, the third fixed part 313b, the first connecting part 314b and the second connecting part 315b of the first damping member 31b (as shown in Figure 11 and Figure 12 ).

[0223] The first fixed part 321b is installed in the first mounting slot 224b, and the second fixed part 322b is installed in the second mounting slot 225b, so as to realize the assembly between the second damping member 32b and the second fixed frame 22b. The third fixed part 323b is fixedly connected to the sliding part 261b of the second auxiliary swing arm 26b, so as to realize the fixed connection between the second damping member 32b and the second auxiliary swing arm 26b. The first fixed block 228b is installed in the first fixed hole 326b, the second fixed block 229b is installed in the second fixed hole 327b, and the third fixed block 264b is installed in the third fixed hole 328b.

[0224] In the embodiment, the second synchronization member 60b has the same structure as the first synchronization member 60a. The second synchronization member 60b comprises a fixed column 61b and a synchronization sliding block 62b. Specifically, the second synchronization member 60b is installed in the mounting slot 111b. Specifically, one end of the fixed column 61b is installed in the mounting hole 148 of the mounting protrusion 14e, and the other end is installed in the mounting hole of the mounting protrusion 13e. The first cam 63b is installed in the first spiral slot 255b and can slide relative to the rotating part 252b in the first spiral slot 255b. The second cam 64b is installed in the second spiral slot 265b and can slide relative to the rotating part 262b in the second spiral slot 265b. The structure of each component of the second synchronization member 60b and the connection relationship between each component and the second connecting assembly 20b can refer to the relevant description of the first synchronization member 60a.

[0225] Please refer to Figure 10 , Figure 15 and Figure 16 , Figure 15 is a structural schematic view of the third connecting assembly 20c in the foldable mechanism 130 shown in Figure 6 , Figure 16 is a structural schematic view of the third connecting assembly 20c from another angle shown in Figure 15 .

[0226] The first fixing frame 21c is provided with a receiving notch 211c, a mounting notch 212c and a guide slot 213c. In the present embodiment, the structures of the receiving notch 211c, the mounting notch 212c and the guide slot 213c can be referred to the relevant descriptions of the receiving notch 211a, the mounting notch 212a and the guide slot 217a (as shown in Figure 11 and Figure 12 ) of the first fixing frame 21a, which will not be repeated here. The mounting notch 212c is located at the middle of the first fixing frame 21c.

[0227] The first main swing arm 23c comprises a rotating part 231c, a sliding part 232c and a connecting part 233c connected between the rotating part 231c and the sliding part 232c. The structure of the first main swing arm 23c can be referred to the relevant descriptions of the first main swing arm 23a (as shown in Figure 11 and Figure 12 ), which will not be repeated here.

[0228] The rotating part 231c comprises two sub-rotating parts 234c. The structure of the rotating part 231c is adapted to the structure of the mounting notch 212c. In addition, the third connecting assembly 20c further comprises a first pin shaft 251c which can be arranged in the through holes (not shown in the figure) of the two sub-rotating parts 234c. Specifically, the first pin shaft 251c can be mounted in the mounting notch 212c. The first pin shaft 251c is a circular shaft, the axis of the first pin shaft 251c is parallel to the Y-axis direction, and the axis of the first pin shaft 251c is coaxial with the first pin shaft 271a (as shown in Figure 11 and Figure 12 ). The two sub-rotating parts 234c can rotate relative to the first pin shaft 251c to realize the rotational connection between the rotating part 231c and the first pin shaft 251c, and further realize the rotational connection between the first main swing arm 23c and the first fixing frame 21c.

[0229] The structure of the sliding part 232c is adapted to the structure of the first sliding slot 101c. The sliding part 232c is provided with two first sliding grooves 235c, each of which is an arc-shaped groove adapted to the first sliding block 14a. The two first sliding blocks 14a can be respectively mounted in the two first sliding grooves 235c and can slide and rotate in the first sliding grooves 235c, so that the sliding part 232c can be mounted in the first sliding slot 101c and can slide and rotate in the first sliding slot 101c to realize the sliding and rotational connection between the sliding part 232c and the base 10, and further realize the sliding and rotational connection between the first main swing arm 23c and the base 10. Each first sliding block 14a is coaxial with a first sliding groove 235c.

[0230] The second fixing frame 22c is provided with a receiving notch 221c, a mounting notch 222c and a guide slot 223c. In the embodiment, the structures of the receiving notch 221c, the mounting notch 222c and the guide slot 223c can be referred to the relevant description of the receiving notch 211c, the mounting notch 212c and the guide slot 213c of the first fixing frame 21c, which will not be repeated here. The receiving notch 221c also penetrates through the left side surface of the second fixing frame 22c. The opening of the mounting notch 222b is located on the left side surface of the second fixing frame 22c.

[0231] The second main swing arm 24c comprises a rotating part 241c, a sliding part 242c and a connecting part 243c connected between the rotating part 241c and the sliding part 242c. The structure of the second main swing arm 24c can be referred to the relevant description of the first main swing arm 23c, which will not be repeated here.

[0232] The rotating part 241c comprises two sub-rotating parts 244c. The structure of the rotating part 241c is matched with the structure of the mounting notch 222c. In addition, the third connecting assembly 20c further comprises a second pin shaft 252c which can be arranged in the through holes (not shown in the figure) of the two sub-rotating parts 244c. Specifically, the second pin shaft 252c can be mounted in the mounting notch 222c. The second pin shaft 252c is a circular shaft, the axis of the second pin shaft 252c is parallel to the Y-axis direction, and coaxial with the second pin shaft 272a (as shown in FIG. 27). Figure 11 and Figure 12 The two sub-rotating parts 244c can rotate relative to the second pin shaft 252c to realize the rotating connection between the rotating part 241c and the second pin shaft 252c, and further realize the rotating connection between the second main swing arm 24c and the second fixing frame 22c.

[0233] The structure of the sliding part 242c is matched with the structure of the second sliding slot 102c. The sliding part 242c is provided with two second sliding grooves 245c, each of which is an arc-shaped groove matched with the second sliding block 14b. The two second sliding blocks 14b can be respectively mounted in the two second sliding grooves 245c and can slide and rotate in the second sliding grooves 245c, so that the sliding part 242c can be mounted in the second sliding slot 102c and can slide and rotate in the second sliding slot 102c to realize the sliding and rotating connection between the sliding part 242c and the base 10, and further realize the sliding and rotating connection between the second main swing arm 24c and the base 10. Each second sliding block 14b is coaxial with a second sliding groove 245c.

[0234] When the first fixing frame 21c and the second fixing frame 22c rotate relative to the base 10, the first fixing frame 21c drives the first main swing arm 23c to rotate relative to the first fixing frame 21c, and drives the first main swing arm 23c to slide and rotate relative to the base 10; the second fixing frame 22c drives the second main swing arm 24c to rotate relative to the second fixing frame 22c, and drives the second main swing arm 24c to slide and rotate relative to the base 10, so as to realize mutual switching of the third connecting assembly 20c between the folded state and the flattened state.

[0235] Please refer to Figure 17 and Figure 18 , Figure 17 is Figure 6 a structural schematic view of the pressing plate assembly 40 in the foldable mechanism 130 shown in Figure 18 is Figure 17 a structural schematic view of the pressing plate assembly 40 shown in another angle.

[0236] The first pressing plate 41 comprises a support part 411, an auxiliary part 412 and a guide sliding block 413, and the auxiliary part 412 and the guide sliding block 413 are fixedly connected to the support part 411. The first pressing plate 41 is an integrally formed structural member, so as to improve the structural strength of the first pressing plate 41 and ensure the structural stability of the first pressing plate 41. For example, the support part 411 can be made of carbon fiber, and the auxiliary part 412 and the guide sliding block 413 can be made of stainless steel. At this time, the first pressing plate 41 can be made by AIO technology, which not only helps to reduce the manufacturing cost of the first pressing plate 41, but also helps to reduce the weight of the first pressing plate 41.

[0237] It can be understood that the integrally formed first pressing plate 41 can reduce the parts of the foldable mechanism 130, facilitate the assembly of the foldable mechanism 130, reduce the cost of the foldable mechanism 130, and be conducive to the miniaturization design of the foldable mechanism 130. Moreover, the first pressing plate 41 made by AIO technology has a smaller weight, which is conducive to the lightweight design of the foldable mechanism 130.

[0238] In other embodiments, the first pressing plate 41 can also be an integrally formed structural member formed by assembly, for example, the auxiliary part 412 and the guide sliding block 413 can be fixedly connected to the support part 411 by welding or bonding.

[0239] The support portion 411 is substantially in the shape of a long strip plate. In this embodiment, the support portion 411 extends along the Y-axis direction. The auxiliary portion 412 is fixedly connected to the bottom surface of the support portion 411. The auxiliary portion 412 is provided with a sliding hole 414, and the opening of the sliding hole 414 is located on the right side surface of the auxiliary portion 412. The sliding hole 414 is recessed from the right side surface of the auxiliary portion 412 to the left side surface (the negative direction of the X-axis shown in the figure) and penetrates through the left side surface of the auxiliary portion 412. That is, the sliding hole 414 penetrates through the auxiliary portion 412 along the X-axis direction. For example, the sliding hole 414 is a square hole.

[0240] In other embodiments, the sliding hole 414 can also not penetrate through the left side surface of the first pressing plate 41, or the auxiliary portion 412 can be enclosed with the support portion 411 to form the sliding hole 414, and the application does not make specific limitations on the forming mode of the sliding hole 414.

[0241] In this embodiment, the auxiliary portion 412 has four, and the four auxiliary portions 412 are sequentially and spacedly arranged along the Y-axis direction. The four auxiliary portions 412 are respectively a front auxiliary portion 412a, a rear auxiliary portion 412b, and two middle auxiliary portions 412c. The front auxiliary portion 412a is fixedly connected to the front side of the support portion 411, the rear auxiliary portion 412b is fixedly connected to the rear side of the support portion 411, and the two middle auxiliary portions 412c are fixedly connected to the middle portion of the support portion 411. In other embodiments, the auxiliary portion 412 can also have one, two, three, or more than five, and the application does not make specific limitations on the number of auxiliary portions 412.

[0242] The guide sliding block 413 is fixedly connected to the bottom surface of the support portion 411 and is spacedly arranged with the auxiliary portion 412. The guide sliding block 413 extends from the bottom surface of the support portion 411 to the direction away from the top surface (the negative direction of the Z-axis shown in the figure). The structure of the guide sliding block 413 is matched with the structure of the guide groove (such as the guide groove 217a shown in the figure, the guide groove 217b shown in the figure, and the guide groove 213c shown in the figure). Figure 11 The bottom surface of the guide sliding block 413 is an arc surface. Figure 13 Figure 15

[0243] ​​In this embodiment, the guide sliding blocks 413 are six, and the six guide sliding blocks 413 are sequentially and spacedly arranged along the Y-axis direction. The six guide sliding blocks 413 are two front guide sliding blocks 413a, two rear guide sliding blocks 413b, and two middle guide sliding blocks 413c. The two front guide sliding blocks 413a are fixedly connected to the front side of the support part 411 and located at opposite sides of the front auxiliary part 412a. The two rear guide sliding blocks 413b are fixedly connected to the rear side of the support part 411 and located at opposite sides of the rear auxiliary part 412b. The two middle guide sliding blocks 413c are fixedly connected to the middle part of the support part 411 and located between the two middle auxiliary parts 412c and spaced from the middle auxiliary parts 412c. In some other embodiments, the guide sliding blocks 413 can also be less than five or more than seven, and the number of guide sliding blocks 413 is not specifically limited in the present application.

[0244] In this embodiment, the four first pressing plate swing arms 43 are a first front pressing plate swing arm 43a, a first rear pressing plate swing arm 43b, and a first middle pressing plate swing arm 43c, and the first middle pressing plate swing arm 43c is two. In some other embodiments, the number of first pressing plate swing arms 43 can also be less than three or more than five, and the number of first pressing plate swing arms 43 is not specifically limited in the present application.

[0245] The first front pressing plate swing arm 43a comprises a sliding part 431a, a rotating part 432a, and a connecting part 433a connected between the rotating part 432a and the sliding part 431a. The sliding part 431a is in the form of a flat plate. The sliding part 431a is adapted to the structure of the sliding hole 414 of the front auxiliary part 412a. The sliding part 431a can be arranged in the sliding hole 414 of the front auxiliary part 412a and can slide relative to the first pressing plate 41 in the sliding hole 414 of the front auxiliary part 412a to achieve the sliding connection between the sliding part 431a and the first pressing plate 41, and further achieve the sliding connection between the first front pressing plate swing arm 43a and the first pressing plate 41.

[0246] The connecting part 433a is provided with an assembly hole 434a, and the opening of the assembly hole 434a is located on the top surface of the connecting part 433a. The assembly hole 434a is recessed from the top surface to the bottom surface of the connecting part 433a (negative direction of the Z-axis shown in the figure), and penetrates through the bottom surface of the connecting part 433a. That is, the assembly hole 434a penetrates through the connecting part 433a along the thickness direction of the connecting part 433a (the direction of the Z-axis shown in the figure). For example, the assembly hole 434a is a circular hole. In some other embodiments, the assembly hole 434a can also not penetrate through the bottom surface of the connecting part 433a, and / or the assembly hole 434a can also be a square hole or other special-shaped hole.

[0247] The structure of the rotating part 432a is adapted to the structure of the first matching groove 103a (such as a circular groove) of the first pressing plate 41. Figure 8The bottom surface of the rotating portion 432a is arc-shaped. The rotating portion 432a is provided with two third sliding grooves (not shown in the figure), one of which is located at the front end surface of the rotating portion 432a, and the other of which is located at the rear end surface of the rotating portion 432a. Both of the third sliding grooves are recessed along the Y-axis direction and penetrate the top surface of the rotating portion 432a. Each of the third sliding grooves is an arc-shaped groove matched with the third sliding block 12c (as shown in FIG. 6) and the axis of each of the third sliding grooves is parallel to the Y-axis direction. Figure 8

[0248] The two third sliding blocks 12c can be respectively installed in the two third sliding grooves and can slide and rotate in the third sliding grooves, so that the rotating portion 432a can be installed in the first matching groove 103a and can slide and rotate in the first matching groove 103a, to realize the sliding and rotating connection between the rotating portion 432a and the base 10, and further realize the sliding and rotating connection between the first front pressing plate swing arm 43a and the base 10. At this time, each of the third sliding blocks 12c is coaxial with one of the third sliding grooves. The rotation center of the first front pressing plate swing arm 43a relative to the base 10 is parallel to the Y-axis direction.

[0249] The first rear pressing plate swing arm 43b has the same structure as the first front pressing plate swing arm 43a. The connecting portion 433b of the first rear pressing plate swing arm 43b is provided with an assembly hole 434b. The structure of the sliding portion 431b in the first rear pressing plate swing arm 43b is matched with the structure of the sliding hole 414 of the rear auxiliary portion 412b. The sliding portion 431b can be arranged in the sliding hole 414 of the rear auxiliary portion 412b and can slide relative to the first pressing plate 41 in the sliding hole 414 of the rear auxiliary portion 412b, to realize the sliding connection between the sliding portion 431b and the first pressing plate 41, and further realize the sliding connection between the first rear pressing plate swing arm 43b and the first pressing plate 41.

[0250] The structure of the rotating portion 432b in the first rear pressing plate swing arm 43b is matched with the structure of the first matching groove 103b (as shown in FIG. 5). The rotating portion 432b is provided with two third sliding grooves. Each of the third sliding grooves is an arc-shaped groove matched with the third sliding block 13c (as shown in FIG. 6), and the axis of each of the third sliding grooves is parallel to the Y-axis direction. Figure 9 Figure 9 ​​As shown, the arc-shaped grooves are adapted to each other, and the axis of each third sliding groove is parallel to the Y-axis direction. Two third sliders 13c can be respectively installed in the two third sliding grooves, and can slide and rotate within the third sliding grooves. Thus, the rotating part 432b can be installed in the first mating groove 103b, and can slide and rotate within the first mating groove 103b, thereby realizing a sliding and rotating connection between the rotating part 432b and the base 10, and further realizing a sliding and rotating connection between the first rear pressure plate swing arm 43b and the base 10. At this time, each third slider 13c is coaxial with a third sliding groove. The rotation center of the first rear pressure plate swing arm 43b relative to the base 10 is parallel to the Y-axis direction, and is coaxial with the rotation center of the first front pressure plate swing arm 43a relative to the base 10.

[0251] The first intermediate pressure plate swing arm 43c has the same structure as the first front pressure plate swing arm 43a. The connecting portion 433c of the first intermediate pressure plate swing arm 43c is provided with an assembly hole 434c. The structure of the sliding portion 431c in the first intermediate pressure plate swing arm 43c is adapted to the structure of the sliding hole 414 in the intermediate auxiliary portion 412c. The sliding portion 431c of each first intermediate pressure plate swing arm 43c can pass through a sliding hole 414 in one intermediate auxiliary portion 412c and can slide relative to the first pressure plate 41 within the sliding hole 414, thereby achieving a sliding connection between the sliding portion 431c and the first pressure plate 41, and thus achieving a sliding connection between the first intermediate pressure plate swing arm 43c and the first pressure plate 41.

[0252] The structure of the rotating part 432c in the first intermediate pressure plate swing arm 43c and the first mating groove 103c (as shown in the figure) Figure 10 The structure is adapted to the third slider 14c (as shown). The rotating part 432c is provided with two third sliding grooves. Each third sliding groove is adapted to the third slider 14c (as shown). Figure 10 The arc-shaped grooves (as shown) are adapted to each other, and the axis of each third sliding groove is parallel to the Y-axis direction. Four third sliders 14c can be respectively installed in the four third sliding grooves, and can slide and rotate within the third sliding grooves. Thus, the rotating parts 432c of the two first intermediate pressure plate swing arms 43c can be respectively installed in the two first mating grooves 103c, and can slide and rotate within the first mating grooves 103c, thereby realizing a sliding and rotating connection between the rotating parts 432c of the two first intermediate pressure plate swing arms 43c and the base 10, and further realizing a sliding and rotating connection between the two first intermediate pressure plate swing arms 43c and the base 10. At this time, each third slider 14c is coaxial with a third sliding groove. The rotation center of the first intermediate pressure plate swing arm 43c relative to the base 10 is parallel to the Y-axis direction, and is coaxial with the rotation center of the first front pressure plate swing arm 43a relative to the base 10.

[0253] Please refer to the following: Figure 11 , Figure 13 and Figure 15The front side of the support part 411 can be accommodated in the accommodation notch 211a of the first fixing frame 21a, the rear side of the support part 411 can be accommodated in the accommodation notch 211b of the first fixing frame 21b, and the middle part of the support part 411 can be accommodated in the accommodation notch 211c of the first fixing frame 21c.

[0254] The front auxiliary part 412a can be accommodated in the avoidance groove 216a of the first fixing frame 21a. The sliding hole 414 of the front auxiliary part 412a communicates with the sliding hole 2161a of the first fixing frame 21a, and the sliding part 431a of the first front pressing plate swing arm 43a can also be arranged in the sliding hole 2161a of the first fixing frame 21a and can slide relative to the first fixing frame 21a in the sliding hole 2161a.

[0255] The rear auxiliary part 412b can be accommodated in the avoidance groove 216b of the first fixing frame 21b. The sliding hole 414 of the rear auxiliary part 412b communicates with the sliding hole 2161b of the first fixing frame 21b, and the sliding part 431b of the first rear pressing plate swing arm 43b can also be arranged in the sliding hole 2161b of the first fixing frame 21b and can slide relative to the first fixing frame 21b in the sliding hole 2161b.

[0256] The two front guide sliders 413a can be respectively arranged in the two guide grooves 217a of the first fixing frame 21a and can slide and rotate in the guide grooves 217a to realize the sliding and rotating connection between the first pressing plate 41 and the first fixing frame 21a. The two rear guide sliders 413b can be respectively arranged in the two guide grooves 217b of the first fixing frame 21b and can slide and rotate in the guide grooves 217b to realize the sliding and rotating connection between the first pressing plate 41 and the first fixing frame 21b. The two middle guide sliders 413c can be respectively arranged in the two guide grooves 213c of the first fixing frame 21c and can slide and rotate in the guide grooves 213c to realize the sliding and rotating connection between the first pressing plate 41 and the first fixing frame 21c.

[0257] The structure of the second pressing plate 42 is the same as that of the first pressing plate 41. The second pressing plate 42 comprises a support part 421, an auxiliary part 422 and a guide slider 423, and the auxiliary part 422 and the guide slider 423 are fixedly connected to the support part 421. Among them, the second pressing plate 42 is an integral structure to improve the structural strength of the second pressing plate 42 and ensure the structural stability of the second pressing plate 42. For example, the support part 421 can be made of carbon fiber, and the auxiliary part 422 and the guide slider 423 can be made of stainless steel. At this time, the second pressing plate 42 can be made by AIO technology, which not only helps to reduce the manufacturing cost of the second pressing plate 42, but also helps to reduce the weight of the second pressing plate 42.

[0258] It can be understood that the integrally formed second pressing plate 42 can reduce the parts of the foldable mechanism 130, facilitate the assembly of the foldable mechanism 130, reduce the cost of the foldable mechanism 130, and be conducive to the miniaturization design of the foldable mechanism 130. In addition, the second pressing plate 42 made of AIO technology has a smaller weight, which is helpful for the lightweight design of the foldable mechanism 130.

[0259] In other embodiments, the second pressing plate 42 can also be an integrated structure formed by assembly, for example, the auxiliary part 422 and the guide sliding block 423 can be fixedly connected to the support part 421 by welding or bonding.

[0260] In this embodiment, the structures of the support part 421, the auxiliary part 422 and the guide sliding block 423 can be referred to the related descriptions of the support part 411, the auxiliary part 412 and the guide sliding block 413 in the first pressing plate 41, which will not be repeated here. The auxiliary part 422 is provided with a sliding hole 424.

[0261] The structure of the second pressing plate swing arm 44 is the same as that of the first pressing plate swing arm 43. The second pressing plate swing arm 44 has four, which are the second front pressing plate swing arm 44a, the second rear pressing plate swing arm 44b and the second middle pressing plate swing arm 44c, and the second middle pressing plate swing arm 44c has two.

[0262] The connecting part 443a of the second front pressing plate swing arm 44a is provided with an assembly hole 444a. The structure of the sliding part 441a in the second front pressing plate swing arm 44a is matched with the structure of the sliding hole 424 of the front auxiliary part 422a. The sliding part 441a can be arranged in the sliding hole 424 of the front auxiliary part 422a and can slide in the sliding hole 424 of the front auxiliary part 422a relative to the second pressing plate 42, so as to realize the sliding connection between the sliding part 441a and the second pressing plate 42, and further realize the sliding connection between the second front pressing plate swing arm 44a and the second pressing plate 42.

[0263] The structure of the rotating part 442a in the second front pressing plate swing arm 44a is matched with the structure of the second matching groove 104a (as shown in Figure 8 The rotating part 442a is provided with two fourth sliding grooves. Each fourth sliding groove is matched with the fourth sliding block 12d (as shown in Figure 8The fourth sliding block 12d is coaxial with the fourth sliding slot. The second front pressing plate swing arm 44a is parallel to the rotation center of the base 10 relative to the Y-axis direction, and is coaxial with the second front pressing plate swing arm 44a relative to the rotation center of the base 10.

[0264] The second rear pressing plate swing arm 44b has the same structure as the second front pressing plate swing arm 44a. The connecting part 443b of the second rear pressing plate swing arm 44b is provided with an assembly hole 444b. The structure of the sliding part 441b in the second rear pressing plate swing arm 44b is matched with the structure of the sliding hole 424 of the rear auxiliary part 422b. The sliding part 441b can be arranged in the sliding hole 424 of the rear auxiliary part 422b and can slide relative to the second pressing plate 42 in the sliding hole 424 of the rear auxiliary part 422b, so as to realize the sliding connection between the sliding part 441b and the second pressing plate 42, and further realize the sliding connection between the second rear pressing plate swing arm 44b and the second pressing plate 42.

[0265] The structure of the rotating part 442b in the second rear pressing plate swing arm 44b is matched with the structure of the second matching slot 104b (as shown in the figure). Figure 9 The rotating part 442b is provided with two fourth sliding slots. Each fourth sliding slot is an arc-shaped slot matched with the fourth sliding block 13d (as shown in the figure). Figure 9 The fourth sliding block 13d is coaxial with the fourth sliding slot. The second rear pressing plate swing arm 44b is parallel to the rotation center of the base 10 relative to the Y-axis direction, and is coaxial with the second front pressing plate swing arm 44a relative to the rotation center of the base 10.

[0266] The second middle pressing plate swing arm 44c is identical in structure to the second front pressing plate swing arm 44a. The connecting portion 443c of the second middle pressing plate swing arm 44c is provided with an assembly hole 444c. The structure of the sliding portion 441c of each second middle pressing plate swing arm 44c is adapted to the structure of the sliding hole 424 of the middle auxiliary portion 422c. The sliding portion 441c of each second middle pressing plate swing arm 44c can be arranged in the sliding hole 424 of the middle auxiliary portion 422c and can slide relative to the second pressing plate 42 in the sliding hole 424 to achieve the sliding connection between the sliding portion 441c and the second pressing plate 42, and further achieve the sliding connection between the second middle pressing plate swing arm 44c and the second pressing plate 42.

[0267] The structure of the rotating portion 442c of the second middle pressing plate swing arm 44c is adapted to the structure of the second matching groove 104c (as shown in Figure 10 ). Figure 10 Each fourth sliding slot is an arc-shaped slot adapted to the fourth sliding block 14d (as shown in ). The axis of each fourth sliding slot is parallel to the Y-axis direction. The two fourth sliding blocks 14d can be respectively arranged in the two fourth sliding slots and can slide and rotate in the fourth sliding slots, so that the rotating portion 442c of each second middle pressing plate swing arm 44c can be respectively arranged in the two second matching grooves 104c and can slide and rotate in the second matching grooves 104c to achieve the sliding and rotating connection between the rotating portion 442c of the second middle pressing plate swing arm 44c and the base 10, and further achieve the sliding and rotating connection between the second middle pressing plate swing arm 44c and the base 10. At this time, each fourth sliding block 14d is coaxial with a fourth sliding slot. The rotation center of the second middle pressing plate swing arm 44c relative to the base 10 is parallel to the Y-axis direction, and is coaxial with the rotation center of the second front pressing plate swing arm 44a relative to the base 10.

[0268] Please refer to Figure 11 , Figure 13 and Figure 15 , the front side of the supporting portion 421 can be accommodated in the accommodation notch 221a of the second fixed frame 22a, the rear side of the supporting portion 421 can be accommodated in the accommodation notch 221b of the second fixed frame 22b, and the middle portion of the supporting portion 421 can be accommodated in the accommodation notch 221c of the second fixed frame 22c.

[0269] The front auxiliary portion 422a can be accommodated in the avoiding slot 226a of the second fixed frame 22a. The sliding hole 424 of the front auxiliary portion 422a is in communication with the sliding hole 2261a of the second fixed frame 22a, and the sliding portion 441a of the second front pressing plate swing arm 44a can also be arranged in the sliding hole 2261a of the second fixed frame 22a and can slide relative to the second fixed frame 22a in the sliding hole 2261a.

[0270] The rear auxiliary part 422b can be accommodated in the avoiding groove 226b of the second fixing frame 22b. The sliding hole 424 of the rear auxiliary part 422b is in communication with the sliding hole 2261b of the second fixing frame 22b, and the sliding part 441b of the second rear pressing plate swing arm 44b can also be arranged in the sliding hole 2261a of the second fixing frame 22b and can slide relative to the second fixing frame 22b in the sliding hole 2261a.

[0271] The two front guide sliding blocks 423a can be respectively arranged in the two guide grooves 227a of the second fixing frame 22a and can slide and rotate in the guide grooves 227a to realize the sliding and rotating connection between the second pressing plate 42 and the second fixing frame 22a. The two rear guide sliding blocks 423b can be respectively arranged in the two guide grooves 227b of the second fixing frame 22b and can slide and rotate in the guide grooves 227b to realize the sliding and rotating connection between the second pressing plate 42 and the second fixing frame 22b. The two middle guide sliding blocks 423c can be respectively arranged in the two guide grooves 223c of the second fixing frame 22c and can slide and rotate in the guide grooves 223c to realize the sliding and rotating connection between the second pressing plate 42 and the second fixing frame 22c.

[0272] It should be noted that the cooperation relationship between the pressing plate assembly 40 and the first connecting assembly 20a, the second connecting assembly 20b and the third connecting assembly 20c is basically the same. To avoid repetition, the cooperation relationship between the pressing plate assembly 40 and the first connecting assembly 20a will be described below.

[0273] When the first fixing frame 21a and the second fixing frame 22a rotate relative to the base 10 (as shown in Figure 7 ), the first fixing frame 21a drives the first pressing plate 41 to slide and rotate relative to the first fixing frame 21a, and also drives the first pressing plate 41 to slide relative to the first pressing plate swing arm 43, thereby driving the first pressing plate 41 and the first pressing plate swing arm 43 to rotate relative to the base 10. The second fixing frame 22a drives the second pressing plate 42 to slide and rotate relative to the second fixing frame 22a, and also drives the second pressing plate 42 to slide relative to the second pressing plate swing arm 44, thereby driving the second pressing plate 42 and the second pressing plate swing arm 44 to rotate relative to the base 10. In this way, the mutual switching between the folding state and the flat state of the pressing plate assembly 40 is realized.

[0274] Please refer to Figure 19 and Figure 20 , Figure 19 is Figure 6 the structural schematic view of the flexible support plate 50 in the foldable mechanism 130 shown in Figure 20 is Figure 19 the structural schematic view of the flexible support plate 50 at another angle.

[0275] The flexible support plate 50 comprises a flexible support portion 51, a first fixing portion 52 and a second fixing portion 53, both of which are fixedly connected to the flexible support portion 51. The flexible support plate 50 can be an integrally formed structure to reduce the number of parts of the flexible support plate 50, which not only facilitates the assembly of the flexible support plate 50, but also reduces the manufacturing cost of the flexible support plate 50. It can be understood that the local thickness of the flexible support plate 50 can be thin, which can reduce the thickness of the flexible support plate 50, which helps to reduce the thickness of the foldable mechanism 130 and achieve the lightweight design of the foldable mechanism 130.

[0276] The flexible support portion 51 is in the shape of a strip-shaped plate. The flexible support portion 51 extends along the Y-axis direction and can be bent around the Y-axis direction. The flexible support portion 51 is provided with a plurality of strip-shaped grooves 511, and the opening of each strip-shaped groove 511 is located on the bottom surface of the flexible support portion 51. Specifically, the opening of each strip-shaped groove 511 is located in the middle region of the bottom surface of the flexible support portion 51. The strip-shaped groove 511 is recessed from the bottom surface to the top surface (the negative direction of the Z-axis shown in the figure) of the flexible support portion 51, and penetrates the front side and the rear side of the flexible support portion 51. Along the X-axis direction, the plurality of strip-shaped grooves 511 are parallel and arranged at intervals. The extension direction of the strip-shaped groove 511 is parallel to the Y-axis direction to increase the flexibility of the flexible support portion 51, which facilitates the bending of the flexible support portion 51 along the Y-axis direction.

[0277] In addition, the flexible support portion 51 is also provided with a first avoiding groove 512, a second avoiding groove 513, a third avoiding groove 514 and a fourth avoiding groove 515. The openings of the first avoiding groove 512, the second avoiding groove 513, the third avoiding groove 514 and the fourth avoiding groove 515 are located on the bottom surface of the flexible support portion 51, and are in communication with one or more strip-shaped grooves 511.

[0278] In this embodiment, the first avoiding groove 512 has three, and the three first avoiding grooves 512 are located on the left side of the flexible support portion 51. Along the Y-axis direction, the three first avoiding grooves 512 are arranged at intervals. The three first avoiding grooves 512 are respectively a first front avoiding groove 512a, a first rear avoiding groove 512b and a first middle avoiding groove 512c. The first front avoiding groove 512a is located on the front side of the flexible support portion 51, the first rear avoiding groove 512b is located on the rear side of the flexible support portion 51, and the first middle avoiding groove 512c is located in the middle of the flexible support portion 51.

[0279] The second avoiding grooves 513 are three, and the three second avoiding grooves 513 are located on the right side of the flexible supporting part 51. In the Y-axis direction, the three second avoiding grooves 513 are arranged at intervals. The three second avoiding grooves 513 are respectively a second front avoiding groove 513a, a second rear avoiding groove 513b, and a second middle avoiding groove 513c. The second front avoiding groove 513a is located on the front side of the flexible supporting part 51 and is located on the side of the first front avoiding groove 512a facing the negative direction of the Y-axis, and is arranged at intervals with the first front avoiding groove 512a. The second rear avoiding groove 513b is located on the rear side of the flexible supporting part 51 and is located on the side of the first rear avoiding groove 512b facing the negative direction of the Y-axis, and is arranged at intervals with the first rear avoiding groove 512b. The second middle avoiding groove 513c is located in the middle of the flexible supporting part 51 and is located on the side of the first middle avoiding groove 512c facing the negative direction of the Y-axis, and is arranged at intervals with the first middle avoiding groove 512c.

[0280] The third avoiding grooves 514 and the fourth avoiding grooves 515 are both two. The two third avoiding grooves 514 are respectively a third front avoiding groove 514a and a third rear avoiding groove 514b, and the two fourth avoiding grooves 515 are respectively a fourth front avoiding groove 515a and a fourth rear avoiding groove 515b. The third front avoiding groove 514a and the fourth front avoiding groove 515a are both located on the front side of the flexible supporting part 51, and are both located on the side of the second front avoiding groove 513a away from the first front avoiding groove 512a, and are both arranged at intervals with the second front avoiding groove 513a. The third rear avoiding groove 514b and the fourth rear avoiding groove 515b are both located on the rear side of the flexible supporting part 51, and are both located on the side of the second rear avoiding groove 513b away from the first rear avoiding groove 512b, and are both arranged at intervals with the second rear avoiding groove 513b. Among them, in the X-axis direction, the third front avoiding groove 514a and the fourth front avoiding groove 515a are arranged at intervals and oppositely, and the third rear avoiding groove 514b and the fourth rear avoiding groove 515b are arranged at intervals and oppositely.

[0281] The first fixed part 52 is fixedly connected to the bottom surface of the flexible supporting part 51, and is arranged at intervals with the strip-shaped groove 511. Specifically, the first fixed part 52 is fixedly connected to the edge region of the bottom of the flexible supporting part 51. The first fixed part 52 extends from the bottom surface of the flexible supporting part 51 in the direction away from the top surface (the positive direction of the Z-axis shown in the figure). Exemplarily, the first fixed part 52 is in a cylindrical shape.

[0282] In the embodiment, the first fixing portion 52 has four, and the four first fixing portions 52 are fixedly connected to the left side of the flexible supporting portion 51, and are arranged at intervals along the Y-axis direction. The four first fixing portions 52 are respectively a first front fixing portion 52a, a first rear fixing portion 52b, and a first middle fixing portion 52c, and the first middle fixing portion 52c has two. The first front fixing portion 52a is fixedly connected to the front side of the flexible supporting portion 51, and is located on the side away from the third front avoiding slot 514a of the first front avoiding slot 512a, and is arranged at intervals with the first front avoiding slot 512a. The first rear fixing portion 52b is fixedly connected to the rear side of the flexible supporting portion 51, and is located on the side away from the third rear avoiding slot 514b of the first rear avoiding slot 512b, and is arranged at intervals with the second rear avoiding slot 513b. The two first middle fixing portions 52c are both fixedly connected to the middle portion of the flexible supporting portion 51, and are respectively located on the opposite sides of the first middle avoiding slot 512c, and are both arranged at intervals with the first middle avoiding slot 512c.

[0283] The second fixing portion 53 is fixedly connected to the bottom surface of the flexible supporting portion 51, and is arranged at intervals with the strip-shaped slot 511 and the first fixing portion 52. In the embodiment, the structure of the second fixing portion 53 and the relationship between the second fixing portion 53 and the flexible supporting portion 51 can be referred to the related description of the first fixing portion 52, which will not be repeated here. Among them, the second fixing portion 53 has four, and the four second fixing portions 53 are fixedly connected to the right side of the flexible supporting portion 51. Along the Y-axis direction, the four second fixing portions 53 are arranged at intervals. The four second fixing portions 53 are respectively a second front fixing portion 53a, a second rear fixing portion 53b, and a second middle fixing portion 53c, and the second middle fixing portion 53c has two. Along the X-axis direction, the second front fixing portion 53a is arranged at intervals and opposite to the first front fixing portion 52a, the second rear fixing portion 53b is arranged at intervals and opposite to the second rear fixing portion 51b, and each second middle fixing portion 53c is arranged at intervals and opposite to one first middle fixing portion 52c.

[0284] Please refer to Figure 17 and Figure 18 , the first front fixing portion 52a is installed in the assembly hole 434a of the first front pressing plate swing arm 43a, the first rear fixing portion 52b is installed in the assembly hole 434b of the first rear pressing plate swing arm 43b, the two first middle fixing portions 52c are respectively installed in the assembly holes 434c of the two first middle pressing plate swing arms 43c, the second front fixing portion 53a is installed in the assembly hole 444a of the second front pressing plate swing arm 44a, the second rear fixing portion 53b is installed in the assembly hole 444b of the second rear pressing plate swing arm 44b, and the two second middle fixing portions 53c are respectively installed in the assembly holes 444c of the two second middle pressing plate swing arms 44c, so as to realize the assembly between the flexible supporting plate 50 and the pressing plate assembly 40.

[0285] When the pressure plate assembly 40 switches between a folded state and an unfolded state, both the first pressure plate swing arm 43 and the second pressure plate swing arm 44 are relative to the base 10 (e.g., Figure 7 The flexible support plate 50 rotates (as shown), thereby causing the first fixing part 52 and the second fixing part 53 to rotate relative to the base 10, which in turn causes the flexible support part 51 to fold or unfold relative to each other. In other words, the flexible support plate 50 can fold or unfold relative to each other under the action of the pressure plate assembly 40. That is, the flexible support plate 50 can switch between a folded state and an unfolded state under the action of the pressure plate assembly 40.

[0286] Please see Figure 5a , Figure 5b and Figure 21 , Figure 21 yes Figure 5a The diagram shows a cross-sectional view of the foldable mechanism 130 cut along point II. Here, "cut along point II" means cut along the plane containing line II; similar descriptions in this application can be understood in the same way.

[0287] When the foldable mechanism 130 is in the flattened state, the pressure plate assembly 40 is also in the flattened state. The first pressure plate 41 and the second pressure plate 42 are located on both sides of the base 10, and the flexible support plate 50 is relatively flattened. The top surface of the first pressure plate 41 (i.e., the top surface of the support part 411), the top surface of the second pressure plate 42 (i.e., the top surface of the support part 421), and the top surface of the flexible support plate 50 (i.e., the top surface of the flexible support part 51) are flush. The top surface of the first pressure plate 41, the top surface of the second pressure plate 42, and the top surface of the flexible support plate 50 form the support surface 1302.

[0288] Among them, the first front clearance groove 512a avoids the sliding part 232a of the first main swing arm 23a (e.g., Figure 11 As shown), the first rear clearance groove 512b avoids the sliding part 232b of the first main swing arm 23b (as shown). Figure 13 As shown), the first clearance groove 512c avoids the sliding part 232c of the first main swing arm 23c (as shown). Figure 15 (As shown). The second front clearance groove 513a avoids the sliding part 242a of the second main swing arm 24a (as shown). Figure 11 As shown), the second rear clearance groove 513b avoids the sliding part 242b of the second main swing arm 24b (as shown). Figure 13 As shown), the second clearance groove 513c avoids the sliding part 242c of the second main swing arm 24c (as shown). Figure 15 (As shown).

[0289] The third front clearance groove 514a avoids the rotating part 252a of the first auxiliary swing arm 25a (e.g., Figure 11 As shown), the third rear clearance groove 514b avoids the rotating part 252b of the first auxiliary swing arm 25b (as shown). Figure 13(As shown). The fourth front clearance groove 515a avoids the rotating part 262a of the second auxiliary swing arm 26a (as shown). Figure 11 As shown), the fourth rear clearance groove 515b avoids the rotating part 262b of the second auxiliary swing arm 26b (as shown). Figure 13 (As shown).

[0290] Understandably, when the flexible support plate 50 is in a flattened state, the arrangement of each clearance groove in the flexible support plate 50 can prevent the flexible support plate 50 from interfering with the swing arms in each connecting component 20, so that the flexible support part 51 will not be supported by each swing arm and will not protrude relative to the top surface of the first pressure plate 41 and the top surface of the second pressure plate 42, thus ensuring that the top surface of the flexible support plate 50 is flush with the top surface of the first pressure plate 41 and the top surface of the second pressure plate 42.

[0291] Please see Figure 22 and Figure 23 , Figure 22 yes Figure 5a The diagram shows the foldable mechanism 130 in its folded state. Figure 23 yes Figure 22 The diagram shows a cross-sectional view of the foldable mechanism 130 taken along line II-II.

[0292] When the foldable mechanism 130 is in the folded state, the pressure plate assembly 40 is also in the folded state, with the first pressure plate 41 and the second pressure plate 42 positioned opposite each other. The flexible support plate 50 is bent and folded relative to each other. The first fixing frame 21a, the first fixing frame 21b, the first fixing frame 21c, the second fixing frame 22a, the second fixing frame 22b, the second fixing frame 22c, the first pressure plate 41, the second pressure plate 42, and the flexible support plate 50 enclose and form 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 after being cut along the XZ plane.

[0293] The bottom portion of the flexible support plate 50 is accommodated in the clearance groove 121 of the base 10 (e.g., Figure 8 As shown), part of it is housed in the clearance slot 131 (as shown). Figure 9 As shown), part of it is housed in the clearance slot 141 (as shown). Figure 10 (As shown). It is understood that the design of the clearance groove in the base 10 can avoid the bottom of the flexible support plate 50, so as to avoid interference between the base 10 and the flexible support plate 50, so as to form a "teardrop" shaped clearance space 1303.

[0294] Please see Figure 5b , Figure 24 and Figure 25 , Figure 24 yes Figure 2 The diagram shows a partial cross-sectional view of the foldable terminal 1000.Figure 25 is Figure 24 is a structural schematic view of the foldable terminal 1000 in the folded state. In the figure, Figure 24 and Figure 25 The foldable terminal 1000 shown in the figure only shows the foldable mechanism 130 and the foldable part 230 of the display screen 200.

[0295] Specifically, the first fixing frame 21a, the first fixing frame 21b and the first fixing frame 21c are fixedly connected to the first housing 110, and the second fixing frame 22a, the second fixing frame 22b and the second fixing frame 22c are fixedly connected to the second housing 120. For example, the first fixing frame 21a, the first fixing frame 21b and the first fixing frame 21c can be fixedly connected to the first housing 110 by screws or bolts, and the second fixing frame 22a, the second fixing frame 22b and the second fixing frame 22c can be fixedly connected to the second housing 120 by screws or bolts.

[0296] At this time, the support surface 1302 formed by the first pressing plate 41, the second pressing plate 42 and the flexible support plate 50 can support the foldable part 230 of the display screen 200, not only to ensure good display of the display screen 200, but also to prevent the foldable part 230 from being damaged or having pits when being touched by external force, thereby improving the use reliability of the display screen 200. Among them, 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 flexible support plate 50 can support the display screen 200 together with the first housing 110 and the second housing 120, thereby realizing effective support of the display screen 200 by the flat foldable device 100.

[0297] It can be understood that, since the flexible support plate 50 is not designed with an opening, the top surface of the flexible support plate 50 is a complete plane, so that the area of the support surface 1302 is larger, which can better support the foldable part 230 and improve the support effect of the flexible support plate 50 on the foldable part 230.

[0298] When the foldable terminal 1000 is in the folded state, the foldable part 230 of the display screen 200 is located inside the foldable mechanism 130. Specifically, the foldable part 230 is located in the avoiding space 1303. Since the avoiding space 1303 is in the shape of a water droplet, the avoiding space 1303 can avoid the R angle formed when the foldable part 230 is bent, so that the foldable part 230 will not be bent at a large angle, thereby avoiding the display screen 200 from having creases and other adverse conditions, which helps to prolong the service life of the display screen 200.

[0299] In the foldable mechanism 130 of the foldable terminal 1000 shown in the embodiment, the first pressing plate 41 and the second pressing plate 42 are integral structural members, which can not only improve the overall strength of the first pressing plate 41 and the second pressing plate 42 and ensure the structural stability of the first pressing plate 41 and the second pressing plate 42, but also reduce the parts of the pressing plate assembly 40, facilitate the assembly of the foldable mechanism 130, help to improve the assembly precision between the pressing plate assembly 40 and other components, and be conducive to the lightweight design of the foldable terminal 1000.

[0300] The above description is merely a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application; in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A foldable mechanism, characterized by, The foldable mechanism comprises a base, a first pressing plate, a first pressing plate swing arm, a first fixing frame, a second pressing plate, a second pressing plate swing arm, a second fixing frame and a flexible supporting plate, wherein, The first pressing plate is an integral structure; the first pressing plate comprises a supporting part and an auxiliary part, and a guide sliding block; the auxiliary part of the first pressing plate is fixedly connected to the bottom surface of the supporting part of the first pressing plate; the auxiliary part of the first pressing plate is provided with a sliding hole, or the auxiliary part of the first pressing plate and the supporting part of the first pressing plate enclose a sliding hole; the guide sliding block of the first pressing plate is fixedly connected to the bottom surface of the supporting part of the first pressing plate and is arranged in a spaced manner with the auxiliary part of the first pressing plate. The first pressing plate swing arm comprises a sliding part and a rotating part; the sliding part of the first pressing plate swing arm is arranged through the sliding hole of the first pressing plate and slides relative to the first pressing plate in the sliding hole of the first pressing plate; and the rotating part of the first pressing plate swing arm is rotationally connected to the base. The first fixing frame is provided with a guide groove; the guide sliding block of the first pressing plate is arranged in the guide groove of the first fixing frame and slides and rotates relative to the first fixing frame in the guide groove of the first fixing frame. The second pressing plate swing arm is rotationally connected to the base and is slidingly connected to the second pressing plate. The second fixing frame is slidingly and rotationally connected to the second pressing plate. The flexible supporting plate is arranged on the first pressing plate swing arm and the second pressing plate swing arm and is bent under the drive of the first pressing plate swing arm and / or the second pressing plate swing arm; the bending direction of the flexible supporting plate is parallel to the rotation center of the first pressing plate swing arm and the second pressing plate swing arm relative to the base. When the foldable mechanism is in the unfolded state, the first pressing plate and the second pressing plate are respectively located on the opposite sides of the base, the first fixing frame and the second fixing frame are respectively located on the opposite sides of the base, and the top surface of the flexible supporting plate, the top surface of the first pressing plate and the top surface of the second pressing plate are flush.

2. The foldable mechanism according to claim 1, wherein The second pressing plate is an integral structure; the second pressing plate swing arm comprises a sliding part and a rotating part; the sliding part of the second pressing plate swing arm is slidingly connected to the second pressing plate; and the rotating part of the second pressing plate swing arm is rotationally connected to the base.

3. The foldable mechanism of claim 2, wherein, The second pressing plate comprises a supporting part and an auxiliary part; the auxiliary part of the second pressing plate is fixedly connected to the bottom surface of the supporting part of the second pressing plate; the auxiliary part of the second pressing plate is provided with a sliding hole, or the auxiliary part of the second pressing plate and the supporting part of the second pressing plate enclose a sliding hole; and the sliding part of the second pressing plate swing arm is arranged through the sliding hole of the second pressing plate and slides relative to the second pressing plate in the sliding hole of the second pressing plate.

4. The foldable mechanism according to any one of claims 1-3, wherein, The structure of the guide sliding block of the first pressing plate is matched with the structure of the guide groove of the first fixing frame.

5. The foldable mechanism of claim 4, wherein, The bottom surface of the guide sliding block of the first pressing plate is an arc surface.

6. The foldable mechanism of claim 1, wherein, The second pressing plate comprises a supporting part, an auxiliary part and a guide sliding block, the auxiliary part of the second pressing plate is fixedly connected to the bottom surface of the supporting part of the second pressing plate, and the guide sliding block of the second pressing plate is fixedly connected to the bottom surface of the supporting part of the second pressing plate and is arranged in a spaced manner with the auxiliary part of the second pressing plate. The second fixed frame is provided with a guide groove, and the guide sliding block of the second pressing plate is installed in the guide groove of the second fixed frame and slides and rotates in the guide groove of the second fixed frame relative to the second fixed frame.

7. The foldable mechanism of claim 6, wherein, The structure of the guide sliding block of the second pressing plate is matched with the structure of the guide groove of the second fixed frame.

8. The foldable mechanism of claim 7, wherein, The bottom surface of the guide sliding block of the second pressing plate is an arc surface.

9. The foldable mechanism according to any one of claims 1-3, wherein, The connecting part of the first pressing plate swing arm is provided with an assembly hole, and the connecting part of the second pressing plate swing arm is provided with an assembly hole. The flexible supporting plate comprises a flexible supporting part, a first fixed part and a second fixed part, the first fixed part and the second fixed part are both fixedly connected to the bottom surface of the flexible supporting part and are spaced from each other, the first fixed part is installed in the assembly hole of the first pressing plate swing arm, and the second fixed part is installed in the assembly hole of the second pressing plate swing arm.

10. The foldable mechanism of claim 9, wherein, The flexible supporting part is provided with a plurality of strip-shaped grooves, the plurality of strip-shaped grooves are arranged in parallel and at intervals, and the extension direction of each strip-shaped groove is parallel to the bending direction of the flexible supporting plate.

11. The foldable mechanism of claim 1, wherein, The rotating part of the first pressing plate swing arm is slidably and rotatably connected to the base, the second pressing plate swing arm comprises a rotating part, and the rotating part of the second pressing plate swing arm is slidably and rotatably connected to the base.

12. The foldable mechanism of any one of claims 1-3, wherein, When the foldable mechanism is in the folded state, the first pressing plate and the second pressing plate are arranged in a spaced manner, and the first pressing plate, the second pressing plate, the first fixed frame, the second fixed frame and the flexible supporting plate enclose an avoiding space, and the avoiding space is in the shape of a water drop.

13. The foldable mechanism of claim 12, wherein, The base is provided with an avoiding groove, and when the foldable mechanism is in the folded state, the avoiding groove is used for avoiding the flexible supporting plate.

14. The foldable mechanism of any one of claims 6-8, wherein, The foldable mechanism further comprises a first main swing arm and a second main swing arm, the rotating part of the first main swing arm is rotatably connected to the first fixed frame, the sliding part of the first main swing arm is slidably and rotatably connected to the base, the rotating part of the second main swing arm is rotatably connected to the second fixed frame, and the sliding part of the second main swing arm is slidably and rotatably connected to the base.

15. The foldable mechanism of claim 14, wherein, The rotating part of the first main swing arm comprises two sub-rotating parts, the two sub-rotating parts of the first main swing arm are arranged at intervals along the length direction of the foldable mechanism, and each sub-rotating part of the first main swing arm is provided with a through hole penetrating through the sub-rotating part of the first main swing arm along the length direction of the foldable mechanism.

16. The foldable mechanism of claim 15, wherein, The first fixed frame is provided with a first installation notch matched with the rotating part of the first main swing arm, the groove bottom wall of the first installation notch is provided with a first installation boss, and the first installation boss is provided with a through hole penetrating through the first installation boss along the length direction of the foldable mechanism. The two sub-rotating parts of the first main swing arm are both installed in the first installation notch.

17. The foldable mechanism of claim 16, wherein, The foldable mechanism further comprises a first pin shaft, which is arranged through the through holes of the two sub-rotation parts of the first main swing arm and the through hole of the first mounting boss.

18. The foldable mechanism of claim 17, wherein, The first pin shaft is a round shaft.

19. The foldable mechanism of any one of claims 1-3, wherein, The base comprises a shaft cover, a first support and a second support, The first support is fixedly connected to the front end of the shaft cover, and the second support is fixedly connected to the rear end of the shaft cover. The number of the first pressure plate swing arms is two, and the rotation parts of the two first pressure plate swing arms are rotationally connected to the first support and the second support respectively. The second pressure plate swing arm comprises a rotation part, and the number of the second pressure plate swing arms is two, and the rotation parts of the two second pressure plate swing arms are rotationally connected to the first support and the second support respectively. 20.A foldable terminal, comprising: The foldable mechanism comprises a first shell, a second shell and the foldable mechanism as claimed in any one of claims 1 to 19, which is connected between the first shell and the second shell.

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