Foldable mechanism and foldable terminal

Abstract

An embodiment of the present application provides a foldable mechanism and a foldable terminal, and the foldable terminal includes the above-mentioned foldable mechanism. The foldable mechanism includes a base, a connection assembly, and a floating plate. The connection assembly includes a first fixed frame and a first secondary swing arm. A first sliding portion of the first secondary swing arm is slidably connected to the first fixed frame, and a first rotating portion of the first secondary swing arm is rotatably connected to the base. A first connection portion of the floating plate is slidably and rotatably connected to a first auxiliary portion. In the foldable mechanism shown in the present application, the floating plate can be lifted or lowered relative to the base under the drive of the first secondary swing arm, and the floating plate does not need to be assembled with the base through structural members such as springs, which simplifies the overall structure of the foldable mechanism and is conducive to realizing the lightweight design of the foldable terminal.

Description

[0001] This application claims the priority of a Chinese patent application with an application number of 202210336321.3 and an application title of "Foldable Mechanism and Foldable Terminal" filed with the Chinese Patent Office on March 31, 2022, the entire content of which is incorporated herein by reference. Technical Field

[0002] This application relates to the technical field of foldable terminals, and particularly to a foldable mechanism and a foldable terminal. Background Art

[0003] With the progress of technology, the era of large-screen intelligent terminals has arrived. Foldable terminals are favored by users because of their large screens and 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 and being unfavorable for the lightweight design of the foldable terminal. Summary of the Invention

[0004] This application provides a foldable mechanism and a foldable terminal, which are used to simplify the structure of the foldable mechanism and achieve the lightweight design of the foldable terminal.

[0005] In a first aspect, this application provides a foldable mechanism, including a base, a connection component, and a floating plate. The connection component is installed on the base, and the floating plate is located on the top side of the base. The connection component includes a first fixing frame and a first secondary swing arm. The first secondary swing arm includes a first sliding part, a first rotating part, and a first auxiliary part. The first rotating part is fixedly connected between the first sliding part and the first auxiliary part. The first sliding part is slidably connected to the first fixing frame, and the first rotating part is rotatably connected to the base. The floating plate includes a first connection part, and the first connection part is slidably and rotatably connected to the first auxiliary part.

[0006] During the unfolding process of the foldable mechanism, for example, during the process of the foldable mechanism switching from the folded state to the flattened state, the first auxiliary part slides and rotates relative to the first sliding part to drive the floating plate to float relative to the base.

[0007] During the folding process of the foldable mechanism, for example, during the process of the foldable mechanism switching from the flattened state to the folded state, the first auxiliary part rotates and slides relative to the first sliding part to drive the floating plate to sink relative to the base.

[0008] In the foldable mechanism shown in this application, the first connection part of the floating plate is used in cooperation with the first auxiliary part of the first secondary swing arm to achieve the floating or sinking of the floating plate relative to the base. In other words, the floating plate can be driven by the first secondary swing arm to float or sink relative to the base. The floating plate does not need to be assembled with the base through structural parts such as springs, which simplifies the overall structure of the foldable mechanism and is conducive to the lightweight design of the foldable terminal.

[0009] In one implementation, the first auxiliary part is provided with a first auxiliary groove, the first auxiliary groove has a folded position and a flattened position, and the folded position of the first auxiliary groove is located on the top side of the flattened position of the first auxiliary groove. Among them, the folded position of the first auxiliary groove is located on the top side of the first auxiliary groove, and the flattened position of the first auxiliary groove is located on the bottom side of the first auxiliary groove.

[0010] The first connecting part includes a first pin, the first pin is installed in the first auxiliary groove, and can slide and rotate relative to the first auxiliary part in the first auxiliary groove to realize the sliding and rotating connection between the first connecting part and the first auxiliary part.

[0011] When the foldable mechanism is in the folded state, the connecting component is in the folded state, and the first pin is located at the folded position of the first auxiliary groove.

[0012] When the foldable mechanism is in the flattened state, the connecting component is in the flattened state, and the first pin is located at the flattened position of the first auxiliary groove.

[0013] When the foldable mechanism switches from the folded state to the flattened state, the first pin slides from the folded position of the first auxiliary groove to the flattened position of the first auxiliary groove.

[0014] When the foldable mechanism switches from the flattened state to the folded state, the first pin slides from the flattened position of the first auxiliary groove to the folded position of the first auxiliary groove.

[0015] In another implementation, the first connecting part is provided with a first auxiliary groove, the first auxiliary groove has a folded position and a flattened position, and the folded position of the first auxiliary groove is located on the bottom side of the flattened position of the first auxiliary groove. Among them, the folded position of the first auxiliary groove is located on the bottom side of the first auxiliary groove, and the flattened position of the first auxiliary groove is located on the top side of the first auxiliary groove.

[0016] The first auxiliary part includes a first pin, the first pin is installed in the first auxiliary groove, and can slide and rotate relative to the first connecting part in the first auxiliary groove to realize the sliding and rotating connection between the first connecting part and the first auxiliary part.

[0017] When the foldable mechanism is in the folded state, the connecting component is in the folded state, and the first pin is located at the folded position of the first auxiliary groove.

[0018] When the foldable mechanism is in the flattened state, the connecting component is in the flattened state, and the first pin is located at the flattened position of the first auxiliary groove.

[0019] When the foldable mechanism switches from the folded state to the flattened state, the first pin slides from the folded position of the first auxiliary groove to the flattened position of the first auxiliary groove.

[0020] When the foldable mechanism switches from the flattened state to the folded state, the first pin slides from the flattened position of the first auxiliary groove to the folded position of the first auxiliary groove.

[0021] In one embodiment, the connection assembly of the foldable mechanism further includes a second fixing frame and a second secondary swing arm. The second secondary swing arm includes a second sliding portion, a second rotating portion, and a second auxiliary portion. The second rotating portion is fixedly connected between the second sliding portion and the second auxiliary portion. The second sliding portion is slidably connected to the second fixing frame, the second rotating portion is rotatably connected to the base, and the floating plate further includes a second connecting portion. The second connecting portion is slidably and rotatably connected to the second auxiliary portion.

[0022] When the foldable mechanism is in the folded state, the first fixing frame and the second fixing frame are folded relative to each other, and the first secondary swing arm and the second secondary swing arm are folded relative to each other.

[0023] When the foldable mechanism is in the flattened state, the first fixing frame and the second fixing frame are located on opposite sides of the base and are flattened relative to each other, and the first secondary swing arm and the second secondary swing arm are flattened relative to each other.

[0024] During the unfolding process of the foldable mechanism, the first auxiliary portion slides and rotates relative to the first sliding portion, and the second auxiliary portion slides and rotates relative to the first sliding portion to jointly drive the floating plate to float relative to the base.

[0025] During the folding process of the foldable mechanism, the first auxiliary portion slides and rotates relative to the first sliding portion, and the second auxiliary portion slides and rotates relative to the first sliding portion to jointly drive the floating plate to sink relative to the base.

[0026] In the foldable mechanism shown in this embodiment, the first connecting portion of the floating plate is cooperated with the first auxiliary portion of the first secondary swing arm, and the second connecting portion of the floating plate is cooperated with the second auxiliary portion of the second secondary swing arm to realize the floating or sinking of the floating plate relative to the base. In other words, the floating plate can be floated or sunk relative to the base under the joint drive of the first secondary swing arm and the second secondary swing arm. The floating plate does not need to be assembled with the base through structural members such as springs, which not only simplifies the overall structure of the foldable mechanism, is beneficial to the lightweight design of the foldable terminal, but also improves the left-right symmetry of the connection assembly and ensures the force balance on both sides during the movement of the floating plate relative to the base.

[0027] In one embodiment, the second auxiliary portion is provided with a second auxiliary groove. The second auxiliary groove has a folded position and a flattened position. The folded position of the second auxiliary groove is located on the top side of the flattened position of the second auxiliary groove. Among them, the folded position of the second auxiliary groove is located on the top side of the second auxiliary groove, and the flattened position of the second auxiliary groove is located on the bottom side of the second auxiliary groove.

[0028] The second connecting part includes a second pin post. The second pin post is installed in the second auxiliary groove and can slide and rotate relative to the second auxiliary part within the second auxiliary groove, so as to achieve the sliding and rotational connection between the second connecting part and the second auxiliary part.

[0029] When the foldable mechanism is in the folded state, the connection assembly is in the folded state, and the second pin post is located at the folded position of the second auxiliary groove.

[0030] When the foldable mechanism is in the flattened state, the connection assembly is in the flattened state, and the second pin post is located at the flattened position of the second auxiliary groove.

[0031] When the foldable mechanism switches from the folded state to the flattened state, the second pin post slides from the folded position of the second auxiliary groove to the flattened position of the second auxiliary groove.

[0032] When the foldable mechanism switches from the flattened state to the folded state, the second pin post slides from the flattened position of the second auxiliary groove to the folded position of the second auxiliary groove.

[0033] In another embodiment, the second connecting part is provided with a second auxiliary groove. The second auxiliary groove has a folded position and a flattened position. The folded position of the second auxiliary groove is located at the bottom side of the flattened position of the second auxiliary groove. Among them, the folded position of the second auxiliary groove is located at the bottom side of the second auxiliary groove, and the flattened position of the second auxiliary groove is located at the top side of the second auxiliary groove.

[0034] The second auxiliary part includes a second pin post. The second pin post is installed in the second auxiliary groove and can slide and rotate relative to the second connecting part within the second auxiliary groove, so as to achieve the sliding and rotational connection between the second connecting part and the second auxiliary part.

[0035] When the foldable mechanism is in the folded state, the connection assembly is in the folded state, and the second pin post is located at the folded position of the second auxiliary groove.

[0036] When the foldable mechanism is in the flattened state, the connection assembly is in the flattened state, and the second pin post is located at the flattened position of the second auxiliary groove.

[0037] When the foldable mechanism switches from the folded state to the flattened state, the second pin post slides from the folded position of the second auxiliary groove to the flattened position of the second auxiliary groove.

[0038] When the foldable mechanism switches from the flattened state to the folded state, the second pin post slides from the flattened position of the second auxiliary groove to the folded position of the second auxiliary groove.

[0039] In one embodiment, the foldable mechanism further includes a pressing plate assembly. The pressing plate assembly is slidably and rotationally connected to the connection assembly. The pressing plate assembly includes a first pressing plate and a second pressing plate. The first pressing plate is slidably and rotationally connected to the first fixing frame, and the second pressing plate is slidably and rotationally connected to the second fixing frame.

[0040] The first pressing plate includes a first functional part, and the first functional part is slidably and rotatably connected to the first sliding part. The second pressing plate includes a second functional part, and the second functional part is slidably and rotatably connected to the second sliding part.

[0041] When the foldable mechanism is in the folded state, the pressing plate assembly is in the folded state, and the first pressing plate and the second pressing plate are folded relative to each other.

[0042] When the foldable mechanism is in the flattened state, the pressing plate assembly is in the flattened state, and the first pressing plate and the second pressing plate are located on opposite sides of the base and are flattened relative to each other.

[0043] During the unfolding process of the foldable mechanism, the first sliding part slides and rotates relative to the first functional part, and the second sliding part slides and rotates relative to the second functional part, so as to drive the first pressing plate and the second pressing plate to unfold relative to each other.

[0044] During the folding process of the foldable mechanism, the first sliding part slides and rotates relative to the first functional part, and the second sliding part slides and rotates relative to the second functional part, so as to drive the first pressing plate and the second pressing plate to fold relative to each other.

[0045] In the foldable mechanism shown in the present application, the first sliding part of the first auxiliary swing arm is matched with the first functional part of the first pressing plate, and the second sliding part of the second auxiliary swing arm is matched with the second functional part of the second pressing plate to achieve the sliding and rotational connection between the first pressing plate and the second pressing plate and the connection component. Thus, the first pressing plate and the second pressing plate can relatively rotate with respect to the base through the connection component. In other words, the first auxiliary swing arm and the second auxiliary swing arm of the connection component can also simultaneously act as the pressing plate swing arms. That is, the foldable mechanism shown in the present application also omits the pressing plate swing arms, simplifies the overall structure of the foldable mechanism, and is beneficial to realizing the lightweight design of the foldable terminal.

[0046] In another embodiment, the foldable mechanism further includes a pressing plate assembly, and the pressing plate assembly is slidably and rotatably connected to the connection component. The pressing plate assembly includes a first pressing plate, a second pressing plate, a first pressing plate swing arm, and a second pressing plate swing arm. The first pressing plate is slidably and rotatably connected to the first fixing frame. The second pressing plate is slidably and rotatably connected to the second fixing frame. The sliding part of the first pressing plate swing arm is slidably connected to the first pressing plate, so that the first pressing plate swing arm is slidably connected to the first pressing plate. The rotating part of the first pressing plate swing arm is rotatably connected to the base, so that the first pressing plate swing arm is rotatably connected to the base. The sliding part of the second pressing plate swing arm is slidably connected to the second pressing plate, so that the second pressing plate swing arm is slidably connected to the second pressing plate. The rotating part of the second pressing plate swing arm is rotatably connected to the base, so that the second pressing plate swing arm is rotatably connected to the base.

[0047] When the foldable mechanism is in the folded state, the pressing plate assembly is in the folded state, the first pressing plate and the second pressing plate are folded relative to each other, and the first pressing plate swing arm and the first pressing plate swing arm are folded relative to each other.

[0048] When the foldable mechanism is in the flattened state, the pressing plate assembly is in the flattened state. The first pressing plate and the second pressing plate are located on opposite sides of the base and are relatively flattened, and the first pressing plate swing arm and the second pressing plate swing arm are relatively flattened.

[0049] In one embodiment, when the foldable mechanism is in the flattened state, the first fixing frame and the second fixing frame are located on opposite sides of the base and are relatively flattened, and the first pressing plate and the second pressing plate are located on opposite sides of the base and are relatively flattened. The top surfaces of the first pressing plate, the second pressing plate, and the floating plate are flush, and the top surfaces of the first pressing plate, the second pressing plate, and the floating plate form a supporting surface.

[0050] When the foldable mechanism is used in a foldable terminal, the supporting surface can support the foldable part of the display screen. This can not only ensure good display of the display screen, but also when the foldable part is touched, the foldable part is not easily damaged or dented due to external force touch, improving the reliability of use of the display screen.

[0051] In one embodiment, the connecting component of the foldable mechanism further includes 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 fixing frame, and the sliding part of the first main swing arm slides and rotates and is connected to the base. The rotating part of the second main swing arm is rotatably connected to the second fixing frame, and the sliding part of the second main swing arm slides and rotates and is connected to the base.

[0052] In one embodiment, when the foldable mechanism is in the flattened state, the sliding parts of the first main swing arm and the second main swing arm both abut against the bottom surface of the floating plate, so that the top surface of the floating plate is flush with the top surfaces of the first pressing plate and the second pressing plate.

[0053] In one embodiment, the sliding part of the first main swing arm is provided with a first support groove, and the sliding part of the second main swing arm is provided with a second support groove. The floating plate includes a first support part and a second support part.

[0054] When the foldable mechanism is in the flattened state, the bottom wall of the first support groove abuts against the bottom surface of the first support part, and the bottom wall of the second support groove abuts against the bottom surface of the second support part. At this time, the first pressing plate and the first main swing arm can reuse the dimension of the foldable mechanism in the thickness direction, and the second pressing plate and the second main swing arm can reuse the dimension of the foldable mechanism in the thickness direction, so as to reduce the dimension of the foldable mechanism in the thickness direction, which is beneficial to realizing the thin and light design of the foldable mechanism.

[0055] In one embodiment, when the foldable mechanism is in the folded state, the first fixing frame, the second fixing frame, the first pressing plate, the second pressing plate, and the floating plate enclose to form an avoidance space, and the cross section of the avoidance space is in the shape of a water droplet.

[0056] When the foldable mechanism is used in a foldable terminal, the avoidance space of the foldable mechanism can avoid the R angle formed when the foldable part is bent, so that the foldable part will not be bent at a large angle, avoiding bad phenomena such as creases on the display screen, which helps to extend the service life of the display screen.

[0057] In one embodiment, the foldable mechanism further includes a damping component. The damping component is installed on the base and is slidably and rotatably connected to the connecting component. The damping component includes a damper, a first damping swing arm and a second damping swing arm. The damper is fixedly connected to the base. The rotating part of the first damping swing arm is rotatably connected to the damper, and the sliding part of the first damping swing arm is slidably and rotatably connected to the first fixing frame. The rotating part of the second damping swing arm is rotatably connected to the damper, and the sliding part of the second damping swing arm is slidably and rotatably connected to the second fixing frame.

[0058] When the foldable mechanism is in the folded state, the damping component is in the folded state, and the first damping swing arm and the second damping swing arm are folded relative to each other.

[0059] When the foldable mechanism is in the flattened state, the damping component is in the flattened state, and the first damping swing arm and the second damping swing arm are flattened relative to each other.

[0060] When the foldable mechanism is used in a foldable terminal, during the user's use of the foldable terminal, for example, when the foldable terminal is in the folded state or the flattened state, and when the foldable terminal switches between the folded state and the flattened state, the user can clearly feel the damping force provided by the damping component, and the user can experience a better feel, thereby improving the user's experience.

[0061] In one embodiment, the supporting part of the first damping swing arm is fixedly connected to the side of the rotating part of the first damping swing arm away from the sliding part of the first damping swing arm, and the supporting part of the second damping swing arm is fixedly connected to the side of the rotating part of the second damping swing arm away from the sliding part of the second damping swing arm.

[0062] When the foldable mechanism is in the flattened state, the supporting parts of the first damping swing arm and the second damping swing arm both abut against the bottom surface of the floating plate, so that the top surface of the floating plate is flush with the top surfaces of the first pressing plate and the second pressing plate.

[0063] In one embodiment, the rotation center of the first rotating part relative to the base is the first center, the rotation center of the first damping swing arm relative to the base is the second center, and the first center and the second center are coaxial.

[0064] In another embodiment, the rotation center of the first rotating part relative to the base is the first center, the rotation center of the first damping swing arm relative to the base is the second center, and the first center and the second center are spaced apart from each other.

[0065] In the foldable mechanism shown in the present application, when the first fixed frame rotates relative to the base, it drives the first main swing arm to rotate relative to the first fixed frame, slide relative to the base, and also drives the first auxiliary swing arm to slide relative to the first fixed frame and rotate relative to the base, and further drives the first damping swing arm to slide and rotate relative to the first fixed frame and rotate relative to the damper. Since the first center and the second center are spaced apart from each other, that is, the rotation centers of the first auxiliary swing arm and the first damping swing arm do not coincide, the assembly position of the first damping swing arm on the base does not need to be adapted to the assembly position of the first auxiliary swing arm on the base, which improves the assembly freedom between the first damping swing arm and the base and helps to reduce the size of the foldable mechanism.

[0066] In one implementation, the floating plate is slidably connected to the base. Among them, the base is provided with a limiting hole, and the floating plate further includes a limiting portion. The limiting portion is installed in the limiting hole and can slide relative to the base in the limiting hole to achieve the sliding connection between the floating plate and the base, which can not only limit the movement direction of the floating plate relative to the base, but also ensure the assembly accuracy between the floating plate and the base.

[0067] In a second aspect, the present application provides a foldable mechanism, including a base, a connection component, and a pressing plate component. The connection component is installed on the base, and the pressing plate component is slidably and rotationally connected to the connection component. The connection component includes a first fixed frame and a first auxiliary swing arm. The first auxiliary swing arm includes a first sliding portion and a first rotating portion fixedly connected to the first sliding portion. The first sliding portion is slidably connected to the first fixed frame, and the first rotating portion is rotationally connected to the base. The pressing plate component includes a first pressing plate, and the first pressing plate is slidably and rotationally connected to the first fixed frame. The first pressing plate includes a first functional portion, and the first functional portion is slidably and rotationally connected to the first sliding portion.

[0068] When the foldable mechanism is in the folded state, both the connection component and the pressing plate component are in the folded state.

[0069] When the foldable mechanism is in the flattened state, both the connection component and the pressing plate component are in the flattened state.

[0070] During the folding or unfolding process of the foldable mechanism, the first sliding portion is slidably and rotationally connected to the first functional portion to drive the first pressing plate to rotate relative to the base.

[0071] In the foldable mechanism shown in the present application, the first sliding portion of the first auxiliary swing arm is used in cooperation with the first functional portion of the first pressing plate to achieve the sliding and rotational connection between the first pressing plate and the connection component. Thus, the first pressing plate can achieve relative rotation with the base through the connection component. In other words, the first auxiliary swing arm of the connection component can also serve as a pressing plate swing arm at the same time. That is, the foldable mechanism shown in the present application also omits the pressing plate swing arm, simplifies the overall structure of the foldable mechanism, and is beneficial to realizing the lightweight design of the foldable terminal.

[0072] In one embodiment, the first functional part is provided with a first functional groove, the first functional groove has a folded position and a flattened position, and the folded position of the first functional groove is located inside the flattened position of the first functional groove. Among them, the folded position of the first functional groove is located inside the first functional groove, and the flattened position of the first functional groove is located outside the first functional groove.

[0073] The first sliding part includes a first pin shaft, the first pin shaft is installed in the first functional groove, and can slide and rotate relative to the first functional part in the first functional groove.

[0074] When the foldable mechanism is in the folded state, the first pin shaft is located at the folded position of the first functional groove.

[0075] When the foldable mechanism is in the flattened state, the first pin shaft is located at the flattened position of the first functional groove.

[0076] When the foldable mechanism switches from the folded state to the flattened state, the first pin shaft slides from the folded position of the first functional groove to the flattened position of the first functional groove.

[0077] When the foldable mechanism switches from the flattened state to the folded state, the first pin shaft slides from the flattened position of the first functional groove to the folded position of the first functional groove.

[0078] In one embodiment, the first sliding part is provided with a first avoidance hole, the first pin shaft is located on the top side of the first avoidance hole, and at least part of the first functional part is received in the first avoidance hole.

[0079] When the first pin shaft slides and rotates relative to the first functional part in the first functional groove, the first functional part slides and rotates relative to the first sliding part in the first avoidance hole.

[0080] In another embodiment, the first sliding part is provided with a first functional groove, the first functional groove has a folded position and a flattened position, and the folded position of the first functional groove is located outside the flattened position of the first functional groove. Among them, the folded position of the first functional groove is located outside the first functional groove, and the flattened position of the first functional groove is located inside the first functional groove.

[0081] The first connecting part includes a first pin shaft, the first pin shaft is installed in the first functional groove, and can slide and rotate relative to the first connecting part in the first functional groove.

[0082] When the foldable mechanism is in the folded state, the first pin shaft is located at the folded position of the first functional groove.

[0083] When the foldable mechanism is in the flattened state, the first pin shaft is located at the flattened position of the first functional groove.

[0084] When the foldable mechanism switches from the self - folded state to the flattened state, the first pin slides from the folded position of the first functional groove to the flattened position of the first functional groove.

[0085] When the foldable mechanism switches from the flattened state to the folded state, the first pin slides from the flattened position of the first functional groove to the folded position of the first functional groove.

[0086] In one embodiment, the first functional groove is an arc - shaped groove.

[0087] In one embodiment, the connection component of the foldable mechanism further includes a second fixing frame and a second secondary swing arm. The second secondary swing arm includes a second sliding portion and a second rotating portion fixedly connected to the second sliding portion. The second rotating portion is rotatably connected to the base, and the second sliding portion is slidably connected to the second fixing frame. The pressing plate assembly further includes a second pressing plate, and the second pressing plate is slidably and rotatably connected to the second fixing frame. The second pressing plate includes a second functional portion, and the second functional portion is slidably and rotatably connected to the second sliding portion.

[0088] During the folding or unfolding process of the foldable mechanism, the second sliding portion slides and rotates relative to the second functional portion to drive the second pressing plate to rotate relative to the base.

[0089] When the foldable mechanism is in the folded state, the first fixing frame and the second fixing frame are folded relative to each other, the first main swing arm and the second main swing arm are folded relative to each other, the first secondary swing arm and the second secondary swing arm are folded relative to each other, and the first pressing plate and the second pressing plate are folded relative to each other.

[0090] When the foldable mechanism is in the flattened state, the first fixing frame and the second fixing frame are located on opposite sides of the base and are flattened relative to each other, the first main swing arm and the second main swing arm are flattened relative to each other, the first secondary swing arm and the second secondary swing arm are flattened relative to each other, and the first pressing plate and the second pressing plate are located on opposite sides of the base and are flattened relative to each other.

[0091] In the foldable mechanism shown in the present application, by using the cooperation between the first sliding portion of the first secondary swing arm and the first functional portion of the first pressing plate, and the cooperation between the second sliding portion of the second secondary swing arm and the second functional portion of the second pressing plate, the sliding and rotational connection between the first pressing plate and the second pressing plate and the connection component is achieved. Thus, the first pressing plate and the second pressing plate can achieve relative rotation with the base through the connection component. In other words, the first secondary swing arm and the second secondary swing arm of the connection component can also serve as the pressing plate swing arms at the same time. That is, the foldable mechanism shown in the present application also omits the pressing plate swing arms, simplifies the overall structure of the foldable mechanism, and is beneficial to realizing the lightweight design of the foldable terminal.

[0092] In one implementation, the second functional part is provided with a second functional slot, the second functional slot has a folded position and a flattened position, and the folded position of the second functional slot is located inside the flattened position of the second functional slot. Among them, the folded position of the second functional slot is located inside the second functional slot, and the flattened position of the second functional slot is located outside the second functional slot.

[0093] The second sliding part includes a second pin shaft, the second pin shaft is installed in the second functional slot, and can slide and rotate relative to the second functional part in the second functional slot.

[0094] When the foldable mechanism is in the folded state, the second pin shaft is located at the folded position of the second functional slot.

[0095] When the foldable mechanism is in the flattened state, the second pin shaft is located at the flattened position of the second functional slot.

[0096] When the foldable mechanism switches from the folded state to the flattened state, the second pin shaft slides from the folded position of the second functional slot to the flattened position of the second functional slot.

[0097] When the foldable mechanism switches from the flattened state to the folded state, the second pin shaft slides from the flattened position of the second functional slot to the folded position of the second functional slot.

[0098] In one implementation, the second sliding part is provided with a second avoidance hole, the second pin shaft is located on the top side of the second avoidance hole, and at least part of the second functional part is received in the second avoidance hole.

[0099] When the second pin shaft slides and rotates relative to the second functional part in the second functional slot, the second functional part slides and rotates relative to the second sliding part in the second avoidance hole.

[0100] In another implementation, the second sliding part is provided with a second functional slot, the second functional slot has a folded position and a flattened position, and the folded position of the second functional slot is located outside the flattened position of the second functional slot. Among them, the folded position of the second functional slot is located outside the second functional slot, and the flattened position of the second functional slot is located inside the second functional slot.

[0101] The second connecting part includes a second pin shaft, the second pin shaft is installed in the second functional slot, and can slide and rotate relative to the second connecting part in the second functional slot.

[0102] When the foldable mechanism is in the folded state, the second pin shaft is located at the folded position of the second functional slot.

[0103] When the foldable mechanism is in the flattened state, the second pin shaft is located at the flattened position of the second functional slot.

[0104] When the foldable mechanism switches from the self-folded state to the flattened state, the second pin slides from the folded position of the second functional groove to the flattened position of the second functional groove.

[0105] When the foldable mechanism switches from the flattened state to the folded state, the second pin slides from the flattened position of the second functional groove to the folded position of the second functional groove.

[0106] In one embodiment, the second functional groove is an arc-shaped groove.

[0107] In another embodiment, the connecting component of the foldable mechanism further includes a second fixing frame and a second secondary swing arm. The second secondary swing arm includes a second sliding portion and a second rotating portion fixedly connected to the second sliding portion. The second rotating portion is rotatably connected to the base, and the second sliding portion is slidably connected to the second fixing frame. The pressing plate assembly further includes a second pressing plate and a pressing plate swing arm. The second pressing plate is slidably and rotatably connected to the second fixing frame. The rotating portion of the pressing plate swing arm is rotatably connected to the base, and the sliding portion of the pressing plate swing arm is slidably connected to the second pressing plate.

[0108] In one embodiment, the foldable mechanism further includes a floating plate located on the top side of the base.

[0109] When the foldable mechanism is in the flattened state, the top surface of the floating plate, the top surface of the first pressing plate, and the top surface of the second pressing plate are flush, and the top surface of the first pressing plate, the top surface of the second pressing plate, and the top surface of the floating plate form a supporting surface.

[0110] When the foldable mechanism is used for a foldable terminal, the supporting surface can support the foldable part of the display screen. It can not only ensure good display of the display screen, but also when the foldable part is touched, the foldable part is not easily damaged or dented due to external touch, improving the use reliability of the display screen.

[0111] In one embodiment, the connecting component of the foldable mechanism further includes a first main swing arm and a second main swing arm. The rotating portion of the first main swing arm is rotatably connected to the first fixing frame, the sliding portion of the first main swing arm is slidably and rotatably connected to the base, the rotating portion of the second main swing arm is rotatably connected to the second fixing frame, and the sliding portion of the second main swing arm is slidably and rotatably connected to the base.

[0112] In one embodiment, when the foldable mechanism is in the flattened state, the sliding portions of the first main swing arm and the second main swing arm both abut against the bottom surface of the floating plate, so that the top surface of the floating plate is flush with the top surfaces of the first pressing plate and the second pressing plate.

[0113] In one embodiment, the sliding portion of the first main swing arm is provided with a first support groove, the sliding portion of the second main swing arm is provided with a second support groove, and the floating plate includes a first support portion and a second support portion.

[0114] When the foldable mechanism is in the flattened state, the bottom wall of the first support groove abuts against the bottom surface of the first support portion, and the bottom wall of the second support groove abuts against the bottom surface of the second support portion. At this time, the first pressing plate and the first main swing arm can reuse the dimension of the foldable mechanism in the thickness direction, and the second pressing plate and the second main swing arm can reuse the dimension of the foldable mechanism in the thickness direction, so as to reduce the dimension of the foldable mechanism in the thickness direction, which is beneficial to realizing the thin and light design of the foldable mechanism.

[0115] In one implementation, when the foldable mechanism is in the folded state, the first fixing frame, the second fixing frame, the first pressing plate, the second pressing plate and the floating plate enclose an avoidance space, and the cross section of the avoidance space is in a water droplet shape.

[0116] When the foldable mechanism is used in a foldable terminal, the avoidance space of the foldable mechanism can avoid the R angle formed when the foldable part is bent, so that the foldable part will not be bent at a large angle, avoiding bad phenomena such as creases on the display screen, and helping to extend the service life of the display screen.

[0117] In one implementation, the first secondary swing arm further includes a first auxiliary portion, and the first auxiliary portion is fixedly connected to a side of the first rotating portion away from the first sliding portion. The second secondary swing arm further includes a second auxiliary portion, and the second auxiliary portion is fixedly connected to a side of the second rotating portion away from the second sliding portion.

[0118] The floating plate includes a first connecting portion and a second connecting portion. The first connecting portion is slidably and rotatably connected to the first auxiliary portion, and the second connecting portion is slidably and rotatably connected to the second auxiliary portion.

[0119] During the unfolding process of the foldable mechanism, the first auxiliary portion slides and rotates relative to the first connecting portion, and the second auxiliary portion slides and rotates relative to the second connecting portion, so as to drive the floating plate to float relative to the base.

[0120] During the folding process of the foldable mechanism, the first auxiliary portion slides and rotates relative to the first connecting portion, and the second auxiliary portion slides and rotates relative to the second connecting portion, so as to drive the floating plate to sink relative to the base.

[0121] In one implementation, the foldable mechanism further includes a damping assembly. The damping assembly is installed on the base and is slidably and rotatably connected to the connecting assembly. The damping assembly includes a damping member, a first damping swing arm and a second damping swing arm. The damping member is fixedly connected to the base. The rotating portion of the first damping swing arm is rotatably connected to the damping member, and the sliding portion of the first damping swing arm is slidably and rotatably connected to the first fixing frame. The rotating portion of the second damping swing arm is rotatably connected to the damping member, and the sliding portion of the second damping swing arm is slidably and rotatably connected to the second fixing frame.

[0122] When the foldable mechanism is in the folded state, the damping assembly is in the folded state, and the first damping swing arm and the second damping swing arm are folded relative to each other.

[0123] When the foldable mechanism is in the flattened state, the damping assembly is in the flattened state, and the first damping swing arm and the second damping swing arm are relatively flattened.

[0124] When the foldable mechanism is used in a foldable terminal, during the user's use of the foldable terminal, for example, when the foldable terminal is in the folded state or the flattened state, and when the foldable terminal switches between the folded state and the unfolded state, the user can clearly feel the damping force provided by the damping assembly, and the user can experience a better touch feeling, thereby improving the user's experience.

[0125] In one embodiment, the support portion of the first damping swing arm is fixedly connected to the side of the rotating portion of the first damping swing arm away from the sliding portion of the first damping swing arm, and the support portion of the second damping swing arm is fixedly connected to the side of the rotating portion of the second damping swing arm away from the sliding portion of the second damping swing arm.

[0126] When the foldable mechanism is in the flattened state, the support portions of the first damping swing arm and the second damping swing arm both abut against the bottom surface of the floating plate, so that the top surface of the floating plate is flush with the top surfaces of the first pressing plate and the second pressing plate.

[0127] In one embodiment, the rotation center of the first rotating portion relative to the base is the first center, the rotation center of the first damping swing arm relative to the base is the second center, and the first center and the second center are coaxial.

[0128] In another embodiment, the rotation center of the first rotating portion relative to the base is the first center, the rotation center of the first damping swing arm relative to the base is the second center, and the first center and the second center are spaced apart from each other.

[0129] In the foldable mechanism shown in the present application, when the first fixing frame rotates relative to the base, it drives the first main swing arm to rotate relative to the first fixing frame, and slide and move relative to the base, and also drives the first auxiliary swing arm to slide relative to the first fixing frame, and rotate relative to the base, and also drives the first damping swing arm to slide and rotate relative to the first fixing frame, and rotate relative to the damper. Since the first center and the second center are spaced apart from each other, that is, the rotation center of the first auxiliary swing arm does not coincide with the rotation center of the first damping swing arm, the assembly position of the first damping swing arm on the base does not need to be adapted to the assembly position of the first auxiliary swing arm on the base, which improves the assembly freedom between the first damping swing arm and the base and helps to reduce the size of the foldable mechanism.

[0130] In a third aspect, the present application provides a foldable terminal, including a first housing, a second housing, and any one of the above foldable mechanisms. The foldable mechanism connects the first housing and the second housing, and the first fixing frame is fixedly connected to the first housing.

[0131] The foldable terminal shown in this application adopts any one of the above foldable mechanisms. The overall structure of the foldable mechanism is simple, which is conducive to realizing the lightweight design of the foldable terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0132] In order to more clearly illustrate the technical solutions of the embodiments of this application, the drawings required for the embodiments of this application will be described below.

[0133] Figure 1 is a schematic structural diagram of a foldable terminal provided by an embodiment of this application in one state;

[0134] Figure 2 is Figure 1 a schematic structural diagram of the foldable terminal shown in the second state;

[0135] Figure 3 is Figure 1 a schematic structural diagram of the foldable terminal shown in the third state;

[0136] Figure 4 is Figure 3 a schematic exploded view of the foldable terminal shown;

[0137] Figure 5 is Figure 4 a schematic structural diagram of the foldable device in the foldable terminal shown;

[0138] Figure 6 is Figure 5 a schematic structural diagram of the foldable mechanism in the foldable device shown;

[0139] Figure 7 is Figure 6 a schematic exploded view of the foldable mechanism shown;

[0140] Figure 8 is Figure 7 a schematic partial view of the foldable mechanism shown;

[0141] Fig. 9 is Figure 8 a schematic diagram of the front end of the shaft cover and the first bracket in the structure shown;

[0142] Fig.10 is Figure 8 a schematic diagram of the rear end of the shaft cover and the second bracket in the structure shown;

[0143] Fig.11 is Figure 8 a schematic diagram of the middle part of the shaft cover and the third bracket in the structure shown;

[0144] Fig.12 is Figure 8Schematic diagram of the structure of the base and the first damping component in the shown structure;

[0145] Fig.13 is Figure 8 Schematic diagram of the structure of the base and the second damping component in the shown structure;

[0146] Fig.14 is Figure 7 Schematic diagram of the structure of the first connection component in the shown foldable mechanism;

[0147] Fig.15 is Figure 7 Schematic diagram of the structure of the second connection component in the shown foldable mechanism;

[0148] Fig.16 is Figure 7 Schematic diagram of the structure of the third connection component in the shown foldable mechanism;

[0149] Fig.17 is Figure 7 Schematic diagram of the structure of the pressing plate component in the shown foldable mechanism;

[0150] Fig.18 is Fig.17 Schematic diagram of the structure of the pressing plate component at another angle;

[0151] Fig.19 is Figure 6 Schematic diagram of the sectional structure of the shown foldable mechanism cut along the I-I;

[0152] Fig. 20 is Fig.19 Schematic diagram of the structure of the shown foldable mechanism in the unfolded state;

[0153] Fig.21 is Fig.19 Schematic diagram of the structure of the shown foldable mechanism in the folded state;

[0154] Fig. 22 is Figure 7 Schematic diagram of the structure of the floating plate in the shown foldable mechanism;

[0155] Fig.23 is Fig. 22 Schematic diagram of the structure of the floating plate at another angle;

[0156] Fig.24 is Figure 6 Schematic diagram of the sectional structure of the shown foldable mechanism cut along the II-II;

[0157] Fig.25 is Fig.24 Schematic diagram of the structure of the shown foldable mechanism in the unfolded state;

[0158] Fig.26 is Fig.19 a schematic structural view of the foldable mechanism shown in the folded state;

[0159] Fig. 27 is Figure 6 a schematic cross-sectional structural view of the foldable mechanism shown taken along section III-III;

[0160] Fig.28 is Fig. 27 a schematic structural view of the foldable mechanism shown in the unfolded state;

[0161] Fig.29 is Fig. 27 a schematic structural view of the foldable mechanism shown in the folded state;

[0162] Fig.30 is Figure 3 a schematic cross-sectional structural view of the foldable terminal shown;

[0163] Fig.31 is Figure 1 a schematic cross-sectional structural view of the foldable terminal shown. Detailed implementation manners

[0164] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application.

[0165] Please refer to Figure 1 and Figure 2 , Figure 1 which is a schematic structural view of a foldable terminal 1000 provided in an embodiment of the present application in one state, Figure 2 is Figure 1 a schematic structural view of the foldable terminal 1000 shown in the second state, Figure 3 is Figure 1 a schematic structural view of the foldable terminal 1000 shown in the third state.

[0166] 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 e-book reader, a laptop computer, a vehicle-mounted device or a wearable device, etc. In this embodiment, the foldable terminal 1000 is a foldable mobile phone. That is, the foldable terminal 1000 is a mobile phone that can switch between a folded state and an unfolded state.

[0167] Among them, for the convenience of description, it is defined that Figure 3The length direction of the foldable terminal 1000 shown is the X-axis direction, the width direction of the foldable terminal 1000 is the Y-axis direction, and the thickness direction of the foldable terminal 1000 is the Z-axis direction. The X-axis direction, Y-axis direction, and Z-axis direction are perpendicular to each other pairwise. Exemplarily, the extending direction of the rotation axis of the foldable terminal 1000 is parallel to the Y-axis direction. That is, the foldable terminal 1000 can be relatively unfolded or relatively folded about the Y-axis direction.

[0168] It should be noted that the limiting words regarding relative position relationships such as parallel and perpendicular mentioned in the embodiments of the present application are all in view of the current technological level, rather than the absolutely strict definitions in the mathematical sense. A small deviation is allowed, and approximate parallel and approximate perpendicular are both acceptable. For example, A is parallel to B means that A is parallel to B or approximately parallel to B, and the included angle between A and B can be between 0 degrees and 10 degrees. For example, A is perpendicular to B means that A is perpendicular to B or approximately perpendicular to B, and the included angle between A and B can be between 80 degrees and 100 degrees.

[0169] Among them, Figure 1 the foldable terminal 1000 shown is in a folded state. The size of the foldable terminal 1000 in the X-axis direction is small, and the foldable terminal 1000 is convenient to carry. Figure 2 and Figure 3 the foldable terminal 1000 shown is in an unfolded state. Exemplarily, Figure 2 the unfolding angle α of the foldable terminal 1000 shown is 90 degrees. Figure 3 the unfolding angle β of the foldable terminal 1000 shown is 180 degrees. In other words, Figure 3 the foldable terminal 1000 shown is in a flattened state. At this time, the size of the foldable terminal 1000 in the X-axis direction is large, and the foldable terminal 1000 has a large display area.

[0170] It should be noted that a little deviation is allowed for the angles exemplified in the embodiments of the present application. For example, Figure 2 the unfolding angle α of the foldable terminal 1000 shown being 90 degrees means that α can be 90 degrees or approximately 90 degrees, such as 80 degrees, 85 degrees, 95 degrees, and 100 degrees, etc. Similarly, Figure 3 the unfolding angle β of the foldable terminal 1000 shown being 180 degrees means that β can be 180 degrees or approximately 180 degrees, such as 170 degrees, 175 degrees, 185 degrees, and 190 degrees, etc. The angles exemplified later can be understood in the same way.

[0171] 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 two times). At this time, the foldable terminal 1000 can include multiple parts, and two adjacent parts can be relatively close to each other and folded until the foldable terminal 1000 is in the folded state, or two adjacent parts can be relatively separated and unfolded until the foldable terminal 1000 is in the unfolded state.

[0172] Please refer to Figure 4 , Figure 4 is Figure 3 the exploded structural schematic diagram of the foldable terminal 1000 shown.

[0173] 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 this 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 in the Y-axis direction.

[0174] As Figure 1 shown, when the foldable terminal 1000 is in the folded state, both the foldable device 100 and the display screen 200 are in the folded state, the first display part 210 and the second display part 220 are arranged oppositely, and the foldable part 230 is bent. At this time, the exposed area of the display screen 200 is relatively small, which can greatly reduce the probability of the display screen 200 being damaged and effectively protect the display screen 200.

[0175] As Figure 2 shown, when the foldable terminal 1000 is in the unfolded state, both the foldable device 100 and the display screen 200 are in the unfolded state, the first display part 210 and the second display part 220 are relatively unfolded, and the foldable part 230 is bent. At this time, the included angle between the first display part 210 and the second display part 220 is α.

[0176] As Figure 3 shown, when the foldable terminal 1000 is in the flattened state, both the foldable device 100 and the display screen 200 are in the flattened state, the first display part 210 and the second display part 220 are relatively flattened, and the foldable part 230 is not bent but flattened. At this time, the included angles between the first display part 210, the second display part 220 and the foldable part 230 are all β, and the display screen 200 has a large display area, realizing the large-screen display of the foldable terminal 1000 and improving the user experience.

[0177] It should be understood that the foldable terminal 1000 shown in the embodiments of the present application is folded inwards. When the foldable terminal 1000 is in the folded state, the display screen 200 is located inside the foldable device 100. In some other embodiments, the foldable terminal 1000 can also be folded outwards. When the foldable terminal 1000 is in the folded state, the display screen 200 is located outside the foldable device 100.

[0178] Please refer to Figure 5 , Figure 5 is Figure 4 the exploded structural schematic diagram of the foldable device 100 in the foldable terminal 1000 shown.

[0179] The foldable device 100 includes a first housing 110, a second housing 120, and a foldable mechanism 130. The foldable mechanism 130 is connected between the first housing 110 and the second housing 120 to achieve a rotational connection between the first housing 110 and the second housing 120. Specifically, the first housing 110 carries the first display part 210, and the second housing 120 carries the second display part 220. In other words, the first display part 210 is installed on the first housing 110, and the second display part 220 is installed on the second housing 120. Among them, the foldable mechanism 130 is disposed opposite to the foldable part 230.

[0180] The first housing 110 and the second housing 120 can rotate relative to each other through the foldable mechanism 130, so that the foldable device 100 can be switched between the folded state and the unfolded state. Specifically, the first housing 110 and the second housing 120 can rotate relative to each other to be oppositely arranged, so that the foldable device 100 is in the folded state, as Figure 1 shown. At this time, the foldable mechanism 130 is in the folded state. The first housing 110 and the second housing 120 can also rotate relative to each other to be relatively unfolded, so that the foldable device 100 is in the semi-unfolded state, as Figure 2 shown. At this time, the foldable mechanism 130 is in the semi-unfolded state. Exemplarily, the included angle between the first housing 110 and the second housing 120 is α. The first housing 110 and the second housing 120 can also rotate relative to each other to be relatively flattened, so that the foldable terminal 1000 is in the flattened state, as Figure 3 shown. Exemplarily, the included angle between the first housing 110 and the second housing 120 is β. At this time, the foldable mechanism 130 is in the flattened state.

[0181] The first housing 110 is provided with a first receiving groove 1101, and the first receiving groove 1101 is 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 of the first housing 110 towards the bottom surface and penetrates through the right side surface of the first housing 110.

[0182] The second housing 120 has the same structure as the first housing 110 and is mirror-symmetrical with respect to the foldable mechanism 130. The second housing 120 is provided with a second receiving groove 1201, and the second receiving groove 1201 is located on the side of the second housing 120 facing the first housing 110. The opening of the second receiving groove 1201 is located on the top surface of the second housing 120. The second receiving groove 1201 is recessed from the top surface of the second housing 120 towards the bottom surface and penetrates through the side surface of the second housing 120 facing the first housing 110.

[0183] When the foldable device 100 is in a flattened state, that is, when the included angle between the first housing 110 and the second housing 120 is β, 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. Among them, 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.

[0184] It should be noted that when describing the foldable terminal 1000 in the embodiments of the present application, the orientation terms such as "top", "bottom", "left", "right", "front" and "rear" are mainly described based on the display orientation of the foldable terminal 1000 in the appendix Figure 3 In the display orientation, the direction towards the positive direction of the Z axis is "top", the direction towards the negative direction of the Z axis is "bottom", the direction towards the positive direction of the X axis is "right", the direction towards the negative direction of the X axis is "left", the direction towards the positive direction of the Y axis is "rear", and the direction towards the negative direction of the Y axis is "front", which does not form a limitation on the orientation of the foldable terminal 1000 in the actual application scenario.

[0185] Existing foldable mechanisms often require numerous structural components to achieve folding and unfolding. For example, a floating plate needs to be connected to a base through elastic components such as springs to achieve the floating and sinking of the floating plate, and a pressing plate swing arm is also required to achieve the relative rotation between the pressing plate and the base, resulting in a complex structure of the foldable mechanism and being unfavorable for realizing the lightweight and miniaturized 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.

[0186] Please refer to Figure 6 and Figure 7 , Figure 6 is Figure 5Schematic structural diagram of the foldable mechanism 130 in the foldable device 100 shown. Figure 7 is Figure 6 Exploded structural diagram of the foldable mechanism 130 shown.

[0187] The foldable mechanism 130 includes a base 10, a connection assembly 20, a damping assembly 30, a pressing plate assembly 40, and a floating plate 50. The connection assembly 20 and the damping assembly 30 are both installed on the base 10 and can be folded or unfolded relative to the base 10. The pressing plate assembly 40 is slidably and rotatably connected to the connection assembly 20 and can be folded or unfolded relative to the base 10 driven by the connection assembly 20. The floating plate 50 is slidably connected to the base 10 and is slidably and rotatably connected to the connection assembly 20. Exemplarily, the base 10 extends in the Y-axis direction.

[0188] When the foldable mechanism 130 is in the folded state, the connection assembly 20, the damping assembly 30, and the pressing plate assembly 40 are all in the folded state. When the foldable mechanism 130 is in the unfolded state, the connection assembly 20, the damping assembly 30, and the pressing plate assembly 40 are all in the unfolded state. During the process of the foldable mechanism 130 switching from the folded state to the unfolded state, the connection assembly 20, the damping assembly 30, and the pressing plate assembly 40 all switch from the folded state to the unfolded state, and the floating plate 50 moves relative to the base 10 along the Z-axis direction driven by the connection assembly 20 and the damping assembly 30 to realize the floating of the floating plate 50 relative to the base 10. During the process of the foldable mechanism 130 switching from the unfolded state to the folded state, the connection assembly 20, the damping assembly 30, and the pressing plate assembly 40 all switch from the unfolded state to the folded state, and the floating plate 50 moves relative to the base 10 along the negative Z-axis direction driven by the connection assembly 20 to realize the sinking of the floating plate 50 relative to the base 10.

[0189] In this embodiment, there are three connection assemblies 20, and the three connection assemblies 20 are arranged at intervals along the Y-axis direction. The three connection assemblies 20 are respectively a first connection assembly 20a, a second connection assembly 20b, and a third connection assembly 20c, and the third connection assembly 20c is located between the first connection assembly 20a and the second connection assembly 20b. The first connection assembly 20a is located at the front side of the foldable mechanism 130, the second connection assembly 20b is located at the rear side of the foldable mechanism 130, and the third connection assembly 20c is located in the middle of the foldable mechanism 130. In some other embodiments, there may also be one, two, or more than four connection assemblies 20, and the present application does not specifically limit the number of the connection assemblies 20.

[0190] The first connection component 20a includes a first fixing bracket 21a, a second fixing bracket 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 fixing bracket 21a is located on one side of the base 10, and the second fixing bracket 22a is located on the other side of the base 10. The first main swing arm 23a is rotatably connected to the first fixing bracket 21a and is slidably and rotatably connected to the base 10. The second main swing arm 24a is rotatably connected to the second fixing bracket 22a and is slidably and rotatably connected to the base 10. The first auxiliary swing arm 25a is slidably connected to the first fixing bracket 21a and is rotatably connected to the base 10. The second auxiliary swing arm 26a is slidably connected to the second fixing bracket 22a and is rotatably connected to the base 10.

[0191] Wherein, when the first connection component 20a switches between the folded state and the unfolded state, the directions in which the first fixing bracket 21a, the first main swing arm 23a, and the first auxiliary swing arm 25a rotate relative to the base 10 are the first direction, and the directions in which the second fixing bracket 22a, the second main swing arm 24a, and the second auxiliary swing arm 26a rotate relative to the base 10 are the second direction, and the second direction is opposite to the first direction.

[0192] Exemplarily, when the first connection component 20a switches from the folded state to the unfolded state, the first fixing bracket 21a, the first main swing arm 23a, and the first auxiliary swing arm 25a rotate counterclockwise relative to the base 10, and the second fixing bracket 22a, the second main swing arm 24a, and the second auxiliary swing arm 26a rotate clockwise relative to the base 10. When the first connection component 20a switches from the unfolded state to the folded state, the first main swing arm 23a and the first auxiliary swing arm 25a rotate clockwise relative to the base 10, and the second main swing arm 24a and the second auxiliary swing arm 26a rotate counterclockwise relative to the base 10.

[0193] It should be noted that the second connection component 20b and the first connection component 20a can be the same or similar components, symmetric or partially symmetric structures, or different structures. In this embodiment, the second connection component 20b can be centrosymmetric with the first connection component 20a. The basic structures of the various components in the second connection component 20b, the connection relationships between the components, and the connection relationships between the components and the components outside the component can all refer to the relevant designs of the first connection component 20a. The second connection component 20b and the first connection component 20a can be different in the detailed structures or positional arrangements of the components. Among them, the second connection component 20b includes a first fixing bracket 21b, a second fixing bracket 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.

[0194] The third connection component 20c includes a first fixing bracket 21c, a second fixing bracket 22c, a first main swing arm 23c, and a second main swing arm 24c. Among them, for the basic structures of the various components of the third connection component 20c, the connection relationships between the components, and the connection relationships between the components and the components outside the component, the relevant designs of the first connection component 20a can be referred to. In some other embodiments, the third connection component 20c may also include a first auxiliary swing arm (not shown in the figure) and a second auxiliary swing arm (not shown in the figure), and the present application does not make specific limitations thereon.

[0195] It should be noted that the first fixing bracket 21a of the first connection component 20a, the first fixing bracket 21b of the second connection component 20b, and the first fixing bracket 21c of the third connection component 20c may be independent structural members of each other, or may be multiple parts of an integral structural member. And / or, the second fixing bracket 22a of the first connection component 20a, the second fixing bracket 22b of the second connection component 20b, and the second fixing bracket 22c of the third connection component 20c may be independent structural members of each other, or may be multiple parts of an integral structural member.

[0196] It should be understood that the "and / or" mentioned in the embodiments of the present application means that both the "and" and "or" situations are applicable. For example, A and / or B includes three situations: only A exists, only B exists, and both A and B exist at the same time. The same understanding can be made for the subsequent descriptions of "and / or".

[0197] The damping component 30 is slidably and rotatably connected to the connection component 20. In this embodiment, there are two damping components 30, and the two damping components 30 are arranged at intervals along the Y-axis direction. The two damping components 30 are respectively a first damping component 30a and a second damping component 30b, and the first damping component 30a is slidably and rotatably connected to the first connection component 20a. During the folding or unfolding process of the first connection component 20a relative to the base 10, the first damping component 30a can provide a damping force. The second damping component 30b is slidably and rotatably connected to the second connection component 20b. During the folding or unfolding process of the second connection component 20b relative to the base 10, the second damping component 30b can provide a damping force. When the user uses the foldable terminal 1000, for example, when the foldable terminal 1000 is in a folded state or a flattened state, and when the foldable terminal 1000 switches between the folded state and the flattened state, the user can clearly feel the damping forces provided by the first damping component 30a and the second damping component 30b, and the user can experience a better feel, thereby improving the user experience.

[0198] In some other embodiments, there may also be three damping components 30, namely a first damping component 30a, a second damping component 30b, and a third damping component (not shown in the figure). The third damping component is slidably connected to the third connection component 20c. During the folding or unfolding of the third connection component 20c relative to the base 10, the third damping component can provide a damping force. Alternatively, there may be one or more than four damping components 30. The present application does not specifically limit the number of the damping components 30.

[0199] In this embodiment, the first damping component 30a includes a damper 31a, a first damping swing arm 32a, and a second damping swing arm 33a. The damper 31a is installed on the base 10. The first damping swing arm 32a is rotatably connected to the damper 31a, and is slidably and rotatably connected to the first fixing bracket 21a. The second damping swing arm 33a is rotatably connected to the damper 31a, and is slidably connected to the second fixing bracket 22a.

[0200] It should be noted that the second damping component 30b and the first damping component 30a may be the same or similar components, symmetric or partially symmetric structures, or different structures. In this embodiment, the second damping component 30b may be mirror-symmetrical with the first damping component 30a. The basic structure of each component in the second damping component 30b, the connection relationship between the components, and the connection relationship between the components and the components outside the component can all refer to the relevant design of the first damping component 30a. The second damping component 30b and the first damping component 30a may be different in the detailed structure or position arrangement of the components. Among them, the second damping component 30b includes a damper 31b, a first damping swing arm 32b, and a second damping swing arm 33b.

[0201] The pressing plate component 40 is slidably and rotatably connected to the connection component 20. In this embodiment, the pressing plate component 40 includes a first pressing plate 41 and a second pressing plate 42. The front side of the first pressing plate 41 is slidably and rotatably connected to the first auxiliary swing arm 25a, and is slidably and rotatably connected to the first fixing bracket 21a. The rear side of the first pressing plate 41 is slidably and rotatably connected to the first auxiliary swing arm 25b, and is slidably and rotatably connected to the first fixing bracket 21b. The middle part of the first pressing plate 41 is slidably and rotatably connected to the first fixing bracket 21c. The front side of the second pressing plate 42 is slidably and rotatably connected to the second auxiliary swing arm 26a, and is slidably and rotatably connected to the second fixing bracket 22a. The rear side of the second pressing plate 42 is slidably and rotatably connected to the second auxiliary swing arm 26b, and is slidably and rotatably connected to the second fixing bracket 22b. The middle part of the second pressing plate 42 is slidably and rotatably connected to the second fixing bracket 22c.

[0202] The floating plate 50 is located between the first pressing plate 41 and the second pressing plate. The front side of the floating plate 50 is slidably and rotatably connected to the first secondary swing arm 25a and the second secondary swing arm 26a. The rear side of the floating plate 50 is slidably and rotatably connected to the first secondary swing arm 25b and the second secondary swing arm 26b. During the process of the foldable mechanism 130 switching from the folded state to the unfolded state, the first connection assembly 20a, the second connection assembly 20b, and the third connection assembly 20c all switch from the folded state to the unfolded state. The first secondary swing arm 25a, the second secondary swing arm 26a, the first secondary swing arm 25b, and the second secondary swing arm 26b slide relative to the floating plate 50 and drive the floating plate 50 to move in the positive Z-axis direction relative to the base 10, so as to realize the floating of the floating plate 50 relative to the base 10.

[0203] During the process of the foldable mechanism 130 switching from the unfolded state to the folded state, the first connection assembly 20a, the second connection assembly 20b, and the third connection assembly 20c all switch from the unfolded state to the folded state. The first secondary swing arm 25a, the second secondary swing arm 26a, the first secondary swing arm 25b, and the second secondary swing arm 26b slide relative to the floating plate 50 and drive the floating plate 50 to move in the negative Z-axis direction relative to the base 10, so as to realize the sinking of the floating plate 50 relative to the base 10.

[0204] Please refer to Figure 7 and Figure 8 , Figure 8 is Figure 7 a partial structural schematic diagram of the foldable mechanism 130 shown.

[0205] The base 10 includes a shaft cover 11, a first bracket 12, a second bracket 13, and a third bracket 14. The first bracket 12, the second bracket 13, and the third bracket 14 are all fixedly connected to the shaft cover 11. In the Y-axis direction, the third bracket 14 is located between the first bracket 12 and the second bracket 13 and is spaced from both the first bracket 12 and the second bracket 13.

[0206] In this embodiment, the shaft cover 11 includes a front end portion 11a, a rear end portion 11b, and a middle portion 11c. The middle portion 11c is 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 an integrally formed structural member. In some other embodiments, the front end portion 11a, the rear end portion 11b, and the middle portion 11c can also form an integrated structural member by assembling. That is, the shaft cover 11 is an integrated structural member formed by assembling.

[0207] The first bracket 12 is fixedly connected to the front end portion 11a of the shaft cover 11, and together with the front end portion 11a of the shaft cover 11, forms the front end portion 10a of the base 10. The second bracket 13 is fixedly connected to the rear end portion 11b of the shaft cover 11, and together with the rear end portion 11b of the shaft cover 11, forms the rear end portion 10b of the base 10. The third bracket 14 is fixedly connected to the middle portion 11c of the shaft cover 11, and together with the middle portion 11c of the shaft cover 11, forms the middle portion 10c of the base 10. Among them, the front end portion 10a of the base 10 is cooperatively connected with the first connection assembly 20a, the rear end portion 10b of the base 10 is cooperatively connected with the second connection assembly 20b, and the middle portion 10c of the base 10 is cooperatively connected with the third connection assembly 20c.

[0208] Please refer to Figure 8 and Fig. 9 , Fig. 9 is Figure 8 a schematic structural diagram of the front end portion 11a of the shaft cover 11 and the first bracket 12 in the structure shown. Among them, Fig. 9 only the structure of the front end portion 11a of the shaft cover 11 facing away from the middle portion 11c is shown.

[0209] The front end portion 11a of the shaft cover 11 is provided with a mounting hole 111a and a mounting groove 112a. The openings of the mounting hole 111a and the mounting groove 112a are both located on the top surface of the front end portion 11a (not marked in the figure). Both the mounting groove 112a and the mounting hole 111a are recessed from the top surface of the front end portion 11a towards the bottom surface (not marked in the figure) (the negative Z-axis direction shown in the figure). Specifically, the mounting hole 111a is located at the edge of the front end portion 11a, and the mounting groove 112a is located in the middle of the front end portion 11a. Exemplarily, there are four mounting holes 111a, and the four mounting holes 111a are respectively located at four positions of the front end portion 11a and are arranged in a matrix. It should be understood that the shape of the mounting hole 111a is not limited to Fig.10 the round hole shown, and it can also be a square hole or a special-shaped hole.

[0210] In addition, the front end portion 11a of the shaft cover 11 is further provided with a positioning post 113a, and the positioning post 113a is arranged on the bottom wall of the mounting groove 112a (not marked in the figure). The positioning post 113a extends along the positive Z-axis direction from the bottom wall of the mounting groove 112a. Exemplarily, the positioning post 113a is cylindrical. In some other embodiments, the positioning post 113a can also be square-columnar or special-shaped-columnar.

[0211] The first bracket 12 is provided with a positioning hole 121, and the opening of the positioning hole 121 is located at the bottom surface of the first bracket 12 (not marked in the figure). The positioning hole 121 is recessed from the bottom surface of the first bracket 12 towards the top surface (not marked in the figure) (the positive Z-axis direction shown in the figure), and penetrates through the top surface of the first bracket 12. That is, the positioning hole 121 penetrates through the first bracket 12 along the thickness direction of the first bracket 12 (the Z-axis direction shown in the figure). Among them, the positioning hole 121 is adapted to the positioning post 113a. When the first bracket 12 is assembled with the front end portion 11a, the positioning post 113a can pass through the positioning hole 121 to achieve the positioning between the first bracket 12 and the shaft cover 11, and ensure the assembly accuracy between the first bracket 12 and the shaft cover 11.

[0212] The first bracket 12 is further provided with a first notch 122 and a second notch 123, and the openings of the first notch 122 and the second notch 123 are both located at the top surface of the first bracket 12. The first notch 122 and the second notch 123 are both recessed from the top surface of the first bracket 12 towards the bottom surface (the Z-axis direction shown in the figure), and penetrate through the top surface of the first bracket 12. Specifically, the first notch 122 is located on the left side of the first bracket 12 and penetrates through the left side surface of the first bracket 12 (not marked in the figure). The second notch 123 is located on the right side of the first bracket 12 and penetrates through the right side surface of the first bracket 12 (not marked in the figure).

[0213] In the Y-axis direction, the first notch 122 and the second notch 123 are arranged at intervals. In the X-axis direction, the first notch 122 and the second notch 123 are partially overlapped. That is, there is partial overlap in the projection of the first notch 122 and the second notch 123 on the X-Z plane. The first notch 122 and the second notch 123 partially reuse the space of the first bracket 12 in the X-axis direction, which helps to reduce the size of the first bracket 12 in the X-axis direction, helps to reduce the size of the foldable mechanism 130 in the X-axis direction, and further helps to reduce the size of the foldable terminal 1000 in the X-axis direction, which is beneficial to the miniaturized design of the foldable terminal 1000.

[0214] In some other embodiments, in the Y-axis direction, the first notch 122 and the second notch 123 can also be partially overlapped or completely overlapped to reduce the size of the first bracket 12 in the Y-axis direction. Or, in the X-axis direction, the first notch 122 and the second notch 123 can also be arranged at intervals or completely overlapped.

[0215] In addition, the first bracket 12 is further provided with a first boss 12a, a second boss 12b, a third boss 12c, and a fourth boss 12d. The first boss 12a, the second boss 12b, the third boss 12c, and the fourth boss 12d are all provided on the top surface of the first bracket 12, and all extend in the positive Z-axis direction from the top surface of the first bracket 12. The first boss 12a and the second boss 12b are located on the left side of the first bracket 12 and on opposite sides of the first notch 122. The third boss 12c and the fourth boss 12d are located on the right side of the first bracket 12 and on opposite sides of the second notch 123.

[0216] The first boss 12a is provided with a first slider 121a, and the first slider 121a is provided on the rear side surface of the first boss 12a (not marked in the figure). The first slider 121a extends in the negative Y-axis direction from the rear side surface of the first boss 12a and is located on the top side of the first notch 122. Among them, the first slider 121a is in the shape of an arc-shaped plate and is recessed in the negative Z-axis direction. The axis of the first slider 121a is parallel to the Y-axis. That is, the top surface (not marked in the figure) and the bottom surface (not marked in the figure) of the first slider 121a are both arc-shaped surfaces and are both recessed in the negative Z-axis direction.

[0217] The second boss 12b is provided with a second slider 121b, and the second slider 121b is provided on the front side surface of the second boss 12b (not marked in the figure). The second slider 121b extends in the positive Y-axis direction from the front side surface of the second boss 12b and is located on the top side of the first notch 122. Along the Y-axis direction, the second slider 121b is spaced apart from the first slider 121a. Among them, the second slider 121b is in the shape of an arc-shaped plate and is recessed in the negative Z-axis direction. The second slider 121b and the first slider 121a are coaxial. That is, the top surface (not marked in the figure) and the bottom surface (not marked in the figure) of the second slider 121b are both arc-shaped surfaces and are both recessed in the negative Z-axis direction. The top surface of the second slider 121b is coaxial with the top surface of the first slider 121a, and the bottom surface of the second slider 121b is coaxial with the bottom surface of the first slider 121a.

[0218] It should be noted that the "coaxial" mentioned in the embodiments of the present application means that the extension lines of the axes coincide with each other. For example, A and B being coaxial means that the extension line of the axis of A coincides with the extension line of the axis of B. The same understanding can be made for the subsequent descriptions related to "coaxial".

[0219] The third boss 12c is provided with a third slider 121c, and the third slider 121c is provided on the rear side surface of the third boss 12c (not marked in the figure). The third slider 121c extends in the negative Y-axis direction from the rear side surface of the third boss 12c and is located on the top side of the second notch 123. Among them, the third slider 121c is in the shape of an arc-shaped plate and is recessed in the negative Z-axis direction. The axis of the third slider 121c is parallel to the Y-axis. That is, the top surface (not marked in the figure) and the bottom surface (not marked in the figure) of the third slider 121c are both arc-shaped surfaces and are both recessed in the negative Z-axis direction.

[0220] The fourth boss 12d is provided with a fourth slider 121d, and the fourth slider 121d is arranged on the front side surface of the fourth boss 12d (not marked in the figure). The fourth slider 121d extends along the positive Y-axis direction from the front side surface of the fourth boss 12d and is located on the top side of the second notch 123. Along the Y-axis direction, the fourth slider 121d and the third slider 121c are arranged at intervals. Wherein, the fourth slider 121d is in the shape of an arc-shaped plate and is recessed in the negative Z-axis direction. The fourth slider 121d and the third slider 121c are coaxial. That is, the top surface (not marked in the figure) and the bottom surface (not marked in the figure) of the fourth slider 121d are both arc-shaped surfaces and are both recessed in the negative Z-axis direction. The top surface of the fourth slider 121d and the top surface of the third slider 121c are coaxial, and the bottom surface of the fourth slider 121d and the bottom surface of the third slider 121c are coaxial.

[0221] The first bracket 12 is further provided with a third notch 124 and a fourth notch 125, and the openings of the third notch 124 and the fourth notch 125 are both located on the top surface of the first bracket 12. The third notch 124 and the fourth notch 125 are both recessed from the top surface of the first bracket 12 towards the bottom surface and penetrate through the top surface of the first bracket 12. Specifically, the third notch 124 is located on the left side of the first bracket 12 and penetrates through the left side surface of the first bracket 12. The fourth notch 125 is located on the right side of the first bracket 12 and penetrates through the right side surface of the first bracket 12. Wherein, the third notch 124 is located at the rear side of the first notch 122 and is arranged at intervals with the first notch 122. The fourth notch 125 is located at the rear side of the second notch 123 and is arranged at intervals with the second notch 123.

[0222] Along the X-axis direction, the third notch 124 and the fourth notch 125 are arranged at intervals and oppositely. Along the Y-axis direction, the third notch 124 and the fourth notch 125 are completely overlapped. That is, the projections of the third notch 124 and the fourth notch 125 on the Y-Z plane are completely overlapped. The third notch 124 and the fourth notch 125 share the space of the first bracket 12 in the Y-axis direction, which helps to reduce the size of the first bracket 12 in the Y-axis direction, helps to reduce the size of the foldable mechanism 130 in the Y-axis direction, and further helps to reduce the size of the foldable terminal 1000 in the Y-axis direction, which is beneficial to realizing the miniaturized design of the foldable terminal 1000.

[0223] In some other embodiments, along the X-axis direction, the third notch 124 and the fourth notch 125 may also be partially overlapped or completely overlapped to reduce the size of the first bracket 12 in the X-axis direction, or, along the Y-axis direction, the third notch 124 and the fourth notch 125 may also be arranged at intervals or partially overlapped.

[0224] The third notch 124 includes a bottom wall of the groove (not labeled in the figure) and two side walls of the groove (not labeled in the figure). In the Y-axis direction, the two side walls of the groove are spaced apart and oppositely arranged, and are connected to opposite sides of the bottom wall of the groove. Among them, the structure of the fourth notch 125 is substantially the same as that of the third notch 124, and will not be elaborated here.

[0225] In addition, the first bracket 12 is also provided with two first rotating shaft holes (not labeled in the figure) and two second rotating shaft holes (not labeled in the figure). The openings of the two first rotating shaft holes are respectively located on the two side walls of the groove of the third notch 124, and the openings of the two second rotating shaft holes are respectively located on the two side walls of the groove of the fourth notch 125. The first rotating shaft hole is recessed from the side wall of the groove of the third notch 124 in the Y-axis direction, and the second rotating shaft hole is recessed from the side wall of the groove of the fourth notch 125 in the Y-axis direction. Exemplarily, both the first rotating shaft hole and the second rotating shaft hole are circular holes. Among them, the two first rotating shaft holes share the same axis, and the two second rotating shaft holes share the same axis.

[0226] The first bracket 12 is also provided with two first limiting blocks (not labeled in the figure) and two second limiting blocks (not labeled in the figure). The two first limiting blocks are respectively arranged on the two side walls of the groove of the third notch 124. The two first limiting blocks both extend from the two side walls of the groove of the third notch 124 in the Y-axis direction and are oppositely arranged. Specifically, the two first limiting blocks are both located at positions on the two side walls of the groove of the third notch 124 that are away from the bottom wall of the groove. Among them, the right side surfaces of the two first limiting blocks are respectively flush with the hole walls of the two first rotating shaft holes.

[0227] The two second limiting blocks are respectively arranged on the two side walls of the groove of the fourth notch 125. The two second limiting blocks both extend from the two side walls of the groove of the fourth notch 125 in the Y-axis direction and are oppositely arranged. Specifically, the two second limiting blocks are both located at positions on the two side walls of the groove of the fourth notch 125 that are away from the bottom wall of the groove. Among them, the right side surfaces of the two second limiting blocks are respectively flush with the hole walls of the two second rotating shaft holes.

[0228] In addition, the first bracket 12 is also provided with a first avoidance notch 126, a second avoidance notch 127 and a limiting hole 128. The opening of the first avoidance notch 126 is located on the bottom wall of the groove of the third notch 124. The first avoidance notch 126 is recessed from the bottom wall of the groove of the third notch 124 in the positive X-axis direction and penetrates through the top surface of the first bracket 12. The opening of the second avoidance notch 127 is located on the bottom wall of the groove of the fourth notch 125. The second avoidance notch 127 is recessed from the bottom wall of the groove of the fourth notch 125 in the negative X-axis direction and penetrates through the top surface of the first bracket 12. Among them, the first avoidance notch 126 and the second avoidance notch 127 are mirror-symmetric. In some other embodiments, the first avoidance notch 126 and the second avoidance notch 127 may not be mirror-symmetric.

[0229] The opening of the limiting hole 128 is located on the top surface of the first bracket 12. The limiting hole 128 is recessed from the top surface to the bottom surface of the first bracket 12 and penetrates through the bottom surface of the first bracket 12. Specifically, in the Y-axis direction, the limiting hole 128 is located between the first notch 122 and the second notch 123 and is spaced apart from the first notch 122 and the second notch 123. Among them, the limiting hole 128 is located between the second boss 12b and the third boss 12c and is spaced apart from the second boss 12b and the third boss 12c. Exemplarily, the limiting hole 128 is a square hole. In some other embodiments, the limiting hole 128 can also be a round hole or an irregular hole.

[0230] In this embodiment, the positioning post 113a of the front end portion 11a is installed in the positioning hole 121 of the first bracket 12, and the first bracket 12 can be fixedly connected to the front end portion 11a through fasteners (such as screws, pins or bolts, etc.). Among them, the first bracket 12 is located in the installation groove 112a and at a position away from the middle portion 11c of the installation groove 112a. Specifically, the fastener passes through the first bracket 12 and is fixedly connected to the front end portion 11a to realize the fixed connection between the first bracket 12 and the front end portion 11a. Exemplarily, the four fasteners all pass through the first bracket 12 and are respectively fixedly connected to the four installation holes 111a of the front end portion 11a. In some other embodiments, the first bracket 12 can also be fixedly connected to the front end portion 11a of the shaft cover 11 by bonding or welding.

[0231] Among them, the first notch 122 and a part of the installation groove 112a together form a first sliding groove 101a, the second notch 123 and a part of the installation groove 112a together form a second sliding groove 102a, the third notch 124 and a part of the installation groove 112a together form a first rotation groove 103a, and the fourth notch 125 and a part of the installation groove 112a together form a second rotation groove 104a.

[0232] Please refer to Figure 8 and Fig.10 , Fig.10 is Figure 8 a schematic structural diagram of the rear end portion 11b of the shaft cover 11 and the second bracket 13 in the shown structure. Among them, Fig.10 only the structure of the rear end portion 11b of the shaft cover 11 away from the middle portion 11c is shown.

[0233] In this embodiment, the rear end portion 11b of the shaft cover 11 is centrosymmetric with the front end portion 11a of the shaft cover 11, which can not only improve the symmetry of the shaft cover 11, but also simplify the overall structure of the shaft cover 11 and reduce the processing 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 front end portion 11a of the shaft cover 11 (such as Fig. 9The related solution shown in the figure) is also applicable, while allowing for slight differences in the detailed structure or positional arrangement of the components between the rear end portion 11b and the front end portion 11a of the shaft cover 11. Among them, the rear end portion 11b of the shaft cover 11 is provided with a mounting hole 111b, a mounting groove 112b, and a positioning post 113b.

[0234] In some other embodiments, the rear end portion 11b of the shaft cover 11 and the front end portion 11a of the shaft cover 11 may also be mirror-symmetrical, or the rear end portion 11b of the shaft cover 11 and the front end portion 11a of the shaft cover 11 may be partially symmetrical, or the rear end portion 11b of the shaft cover 11 and the front end portion 11a of the shaft cover 11 may have the same, similar, or different structures.

[0235] In this embodiment, the second bracket 13 and the first bracket 12 are centrosymmetric, 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 for the basic design of the component structure of the second bracket 13, the design of the positional relationship between components, and the design of the connection relationship between the second bracket 13 and the rear end portion 11b of the shaft cover 11, the relevant solutions of the first bracket 12 (as Fig. 9 shown) can be referred to, while allowing for slight differences in the detailed structure or positional arrangement of the components between the second bracket 13 and the first bracket 12.

[0236] Among them, the second bracket 13 is provided with a positioning hole 131, a first notch 132, a second notch 133, a third notch 134, a fourth notch 135, a first avoidance notch 136, a second avoidance notch 137, and a limit hole 138. The first notch 132 and a part of the mounting groove 112b together form a first sliding groove 101b, the second notch 133 and a part of the mounting groove 112b together form a second sliding groove 102b, the third notch 134 and a part of the mounting groove 112b together form a first rotating groove 103b, and the fourth notch 135 and a part of the mounting groove 112b together form a second rotating groove 104b.

[0237] In some other embodiments, the second bracket 13 and the first bracket 12 may also be mirror-symmetrical, or the second bracket 13 and the first bracket 12 may be partially symmetrical, or the second bracket 13 and the first bracket 12 may have the same, similar, or different structures.

[0238] Please refer to Figure 8 and Fig.11 , Fig.11 which Figure 8 is a schematic diagram of the middle portion 11c of the shaft cover 11 and the structure of the third bracket 14 in the structure shown.

[0239] In this embodiment, an installation hole 111c, an installation groove 112c and a positioning post 113c are provided in the middle part 11c of the shaft cover 11. It should be noted that the structures of the installation hole 111c, the installation groove 112c and the positioning post 113c are respectively substantially the same as those of the installation hole 111a, the installation groove 112a and the positioning post 113a (as Fig. 9 shown) of the front end part 11a, and will not be elaborated here. Among them, the installation groove 112c in the middle part 11c can communicate with the installation groove 112a of the front end part 11a and the installation groove 112b of the rear end part 11b (as Fig.10 shown).

[0240] Exemplarily, there are six installation holes 111c. Four installation holes 111c are respectively located at the four corner positions of the middle part 11c, and two installation holes 111c are located at the middle position of the middle part 11c. There are two positioning posts 113c. One positioning post 113c is located at the position of the middle part 11c close to the front end part 11a and is located between two installation holes 111c, and the other positioning post 113c is located at the position of the middle part 11c close to the rear end part 11b and is located between two installation holes 111c. It should be noted that the numbers of the installation holes 111c and the positioning posts 113c are not limited to this. In some other embodiments, the numbers of the installation holes 111c and / or the positioning posts 113c can also be one, two, three or more than five.

[0241] The third bracket 14 is provided with a positioning hole 141, a first notch 142 and a second notch 143. It should be noted that the structures of the positioning hole 141, the first notch 142 and the second notch 143 are respectively substantially the same as those of the positioning hole 121, the first notch 122 and the second notch 123 (as Fig. 9 shown) of the first bracket 12, and will not be elaborated here. Among them, the first notch 142 and a part of the installation groove 112c together form a first sliding groove 101c, and the second notch 143 and a part of the installation groove 112 together form a second sliding groove 102c.

[0242] Exemplarily, there are two positioning holes 141. One positioning hole 141 is located at the position where the third bracket 14 faces the first bracket 12 (as Fig. 9 shown), and the other positioning hole 141 is located at the position where the third bracket 14 faces the second bracket 13 (as Fig.10 shown). When the third bracket 14 is assembled with the middle part 11c, the two positioning posts 113c can respectively pass through the two positioning holes 141 to realize the positioning between the third bracket 14 and the middle part 11c and ensure the assembly accuracy between the third bracket 14 and the middle part 11c.

[0243] In addition, the third bracket 14 is further provided with a limiting post 144, and the limiting post 144 is arranged on the top surface of the third bracket 14. The limiting post 144 extends along the positive Z-axis direction from the top surface of the third bracket 14. It should be understood that the shape of the limiting post 144 is not limited to Fig.11 the shown cylindrical shape, and it can also be a square column shape or other special-shaped columns.

[0244] Exemplarily, there are two limiting posts 144. One limiting post 144 is located on the right side of the first notch 142 and is arranged at an interval from the first notch 142. The other limiting post 144 is located on the left side of the second notch 143 and is arranged at an interval from the second notch 143. In some other embodiments, there can also be one or more than three limiting posts 144, and the present application does not make a specific limitation on the number of the limiting posts 144.

[0245] Please refer to Figure 8 and Fig.12 , Fig.12 which Figure 8 are schematic structural diagrams of the base 10 and the first damping assembly 30a in the shown structure. Among them, Fig.12 only partial structures of the shaft cover 11, the first bracket 12, and the third bracket 14 in the base 10 are shown.

[0246] In this embodiment, the damper 31a of the first damping assembly 30a is installed in the installation groove 112a of the front end portion 11a (as Fig. 9 shown), and is located at a position of the installation groove 112a facing the middle portion 11c (as Fig.11 shown). Specifically, one end of the damper 31a is installed on the first bracket 12, and the other end is installed on the third bracket 14. In some other embodiments, the damper 31a of the first damping assembly 30a can also be located at a position of the installation groove 112a facing away from the middle portion 11c, and the present application does not make a specific limitation on this.

[0247] The damper 31a includes a first damping shaft 34a, a second damping shaft 35a, a first damping body 36a, and a second damping body 37a. Both the first damping shaft 34a and the second damping shaft 35a are installed in the installation groove 112a of the front end portion 11a and are arranged parallel and at intervals along the X-axis direction. Specifically, the first damping shaft 34a is installed on the left side of the first part 10a, and the second damping shaft 35a is installed on the right side of the first part 10a. Among them, one end of the first damping shaft 34a is installed on the first bracket 12, and the other end is installed on the third bracket 14. One end of the second damping shaft 35a is installed on the first bracket 12, and the other end is installed on the third bracket 14. Exemplarily, both the first damping shaft 34a and the second damping shaft 35a are circular shafts. In some other embodiments, the first damping shaft 34a and the second damping shaft 35a can also be flat shafts or other special-shaped shafts.

[0248] The first damping body 36a is sleeved on the first damping shaft 34a and installed in the installation groove 112a of the front end portion 11a. In this embodiment, the front end face of the first damping body 36a is a hinge face, and the front end face of the first damping body 36a includes a plurality of wave crests and a plurality of wave troughs, and the plurality of wave crests and the plurality of wave troughs are arranged alternately. Among them, the first damping body 36a includes a spring. Exemplarily, there are two first damping bodies 36a, and both of the two first damping bodies 36a are sleeved on the first damping shaft 34a and arranged at intervals along the Y-axis direction.

[0249] When relative rotation occurs between the first damping body 36a and the first damping shaft 34a, the spring of the first damping body 36a deforms to generate a damping force. When the user folds or unfolds the foldable terminal 1000, the user can feel the damping force generated by the relative rotation of the first damping body 36a relative to the first damping shaft 34a, and the user can experience a better hand feeling, thereby improving the user experience.

[0250] The second damping body 37a is sleeved on the second damping shaft 35a and installed in the installation groove 112a of the front end portion 11a. In this embodiment, the front end face of the second damping body 37a is a hinge face, and the front end face of the second damping body 37a includes a plurality of wave crests and a plurality of wave troughs, and the plurality of wave crests and the plurality of wave troughs are arranged alternately. Among them, the second damping body 37a includes a spring. Exemplarily, there are two second damping bodies 37a, and both of the two second damping bodies 37a are sleeved on the second damping shaft 35a and arranged at intervals along the Y-axis direction. Among them, in the X-axis direction, each second damping body 37a is spaced apart from and opposite to a first damping body 36a.

[0251] When relative rotation occurs between the second damping body 37a and the second damping shaft 35a, the spring of the second damping body 37a deforms to generate a damping force. When the user folds or unfolds the foldable terminal 1000, the user can obviously feel the damping force generated by the relative rotation of the second damping body 37a relative to the second damping shaft 35a, and the user can experience a better hand feeling, thereby improving the user experience.

[0252] In some other embodiments, there may be one or more than three first damping bodies 36a, and / or there may be one or more than three second damping bodies 37a. The embodiments of the present application do not specifically limit the number of the first damping bodies 36a and the second damping bodies 37a.

[0253] The first damping swing arm 32a is sleeved on the first damping shaft 34a and is hinged to both first damping bodies 36a. In this embodiment, the first damping swing arm 32a includes a rotating portion 321a, a sliding portion 322a, a connecting portion 323a and a supporting portion 324a, wherein the connecting portion 323a is connected between the rotating portion 321a and the sliding portion 322a, and the supporting portion 324a is connected to one end of the rotating portion 321a away from the connecting portion 323a. The rotating portion 321a, the sliding portion 322a, the connecting portion 323a and the supporting portion 324a can be integrally formed.

[0254] The rotating part 321a includes two sub-rotating parts 325a, and the two sub-rotating parts 325a are arranged at intervals along the Y-axis direction. The rear end surface of each sub-rotating part 325a is a hinge surface, and the rear end surface of the sub-rotating part 325a includes multiple peaks and multiple troughs, and the multiple peaks and multiple troughs are arranged alternately. Exemplarily, the sub-rotating part 325a is roughly cylindrical.

[0255] Specifically, the two sub-rotating parts 325a are both sleeved on the first damping shaft 34a, and are respectively hinged to the two first damping bodies 36a. Among them, the hinge surface of each sub-rotating part 325a is hinged to the hinge surface of each first damping body 36a. When the first damping swing arm 32a rotates relative to the base 10, it drives the first damping shaft 34a to rotate relative to the base 10. In this embodiment, the rotation center of the first damping swing arm 32a relative to the damping member 31a is the second center. That is, the rotation center of the first damping swing arm 32a relative to the base 10 is the second center. Among them, the second center is the axis of the first damping shaft 34a.

[0256] The sliding portion 322a includes two sub-sliding portions 326a, which are arranged at intervals along the Y-axis direction. Each sub-sliding portion 326a is provided with a pin hole (not marked in the figure) at one end away from the connecting portion 323a, and the pin hole passes through the sub-sliding portion 326a along the Y-axis direction.

[0257] In this embodiment, there is one support portion 324a, which is fixedly connected to one end of a sub-rotating portion 325a away from the connecting portion 323a. In other embodiments, there may be two support portions 324a, which are respectively fixedly connected to one end of two sub-rotating portions 325a away from the connecting portion 323a.

[0258] The second damping swing arm 33a is sleeved on the second damping shaft 35a and is hinged to both of the two second damping bodies 37a. In this embodiment, the structure of the second damping swing arm 33a is substantially the same as that of the first damping swing arm 32a. The second damping swing arm 33a includes a rotating part 331a, a sliding part 332a, a connecting part 333a, and a supporting part 334a. Specifically, both of the two sub-rotating parts 335a of the rotating part 331a are sleeved on the second damping shaft 35a and are respectively hinged to the two second damping bodies 37a. When the base 10 of the second damping swing arm 33a rotates, it drives the second damping shaft 35a to rotate relative to the base 10. The rotation center of the second damping swing arm 33a relative to the damping member 31a is the fourth center. That is, the rotation center of the second damping swing arm 33a relative to the base 10 is the fourth center. Among them, the fourth center is the axis center of the second damping shaft 35a.

[0259] When the first damping assembly 30a enters the flattened state from the folded state, that is, when the foldable mechanism 130 (as Figure 6 shown) enters the flattened state from the folded state, that is, when the foldable terminal 1000 (as Figure 3 shown) enters the flattened state from the folded state, in the first damping swing arm 32a, the wave crest on the rear end face of the sub-rotating part 325a will enter the wave trough on the front end face of the first damping body 36a, and at the same time, the wave crest on the front end face of the first damping body 36a will also enter the wave trough on the rear end face of the sub-rotating part 325a. In the second damping swing arm 33a, the wave crest on the rear end face of the sub-rotating part 335a will enter the wave trough on the front end face of the second damping body 37a, and the wave crest on the front end face of the second damping body 37a will enter the wave trough on the rear end face of the sub-rotating part 335a. At this time, the damping force generated by the rotation of the first damping swing arm 32a relative to the first damping shaft 34a is small, and the damping force generated by the rotation of the second damping swing arm 33a relative to the second damping shaft 35a is small, enabling the user to experience the feel of the foldable terminal 1000 being flattened in place.

[0260] In addition, the first damping assembly 30a further includes a first pin shaft 38a and a second pin shaft 39a. The sliding part 322a of the first damping swing arm 32a is sleeved on the first pin shaft 38a, and the sliding part 332a of the second damping swing arm 33a is sleeved on the second pin shaft 39a. Among them, the first pin shaft 38a is adapted to the pin holes of the two sub-sliding parts 326a of the sliding part 322a, and the second pin shaft 39a is adapted to the pin holes of the two sub-sliding parts 336a of the sliding part 332a. Specifically, the first pin shaft 38a is installed in the pin holes of the two sub-sliding parts 326a, and the second pin shaft 39a is installed in the pin holes of the sub-sliding part 336a.

[0261] Please refer to Figure 8 and Fig.13 , Fig.13 which is Figure 8The schematic diagram of the structure of the base 10 and the second damping assembly 30b in the structure shown. Fig.18 Only partial structures of the shaft cover 11 , the second bracket 13 and the third bracket 14 in the base 10 are shown.

[0262] The damping member 31b of the second damping assembly 30b is installed at the rear end portion 11b (such as Fig.10 11b) and is located at a position where the mounting slot 112b faces the middle portion 11c. Specifically, one end of the damping member 31b is mounted on the second bracket 13, and the other end is mounted on the third bracket 14. In some other embodiments, the damping member 31b of the second damping assembly 30b may also be located at a position where the mounting slot 112b faces away from the middle portion 11c.

[0263] The damping member 31b includes a first damping shaft 34b, a second damping shaft 35b, a first damping body 36b and a second damping body 37b. In this embodiment, the structure of each component in the damping member 31b and the matching relationship between the components can refer to the first damping assembly 30a (such as Fig.11 The description of the damping member 31a is omitted here. The rear end surfaces of the first damping body 36b and the second damping body 37b are both hinged surfaces.

[0264] In this embodiment, the first damping shaft 34b and the second damping shaft 35b are both circular shafts. The axis of the first damping shaft 34b and the axis of the second damping shaft 35b are both parallel to the Y-axis direction. Exemplarily, the first damping shaft 34b is coaxial with the first damping shaft 34a, and the second damping shaft 35b is coaxial with the second damping shaft 35a. That is, the axis of the first damping shaft 34b coincides with the axis of the first damping shaft 34a, and the axis of the second damping shaft 35b coincides with the axis of the second damping shaft 35a.

[0265] The first damping swing arm 32b is sleeved on the first damping shaft 34b and is hinged to the two first damping bodies 36b. The second damping swing arm 33b is sleeved on the second damping shaft 35b and is hinged to the two second damping bodies 37b. The first damping swing arm 32b includes a rotating portion 321b, a sliding portion 322b, a connecting portion 323b and a supporting portion 324b. The second damping swing arm 33b includes a rotating portion 331b, a sliding portion 332b, a connecting portion 333b and a supporting portion 334b. The front end surfaces of the two sub-rotating portions 325b of the rotating portion 321b and the front end surfaces of the two sub-rotating portions 335b of the rotating portion 331b are both hinged surfaces.

[0266] In this embodiment, the structure of the first damping swing arm 32b, the mating relationship between the first damping swing arm 32b and the first damping shaft 34b, the structure of the second damping swing arm 33b, and the mating relationship between the second damping swing arm 33b and the second damping shaft 35b can all refer to the relevant descriptions of the first damping assembly 30a in the above text and will not be elaborated here. Among them, the rotation center of the first damping swing arm 32b relative to the base 10 is the axis center of the first damping shaft 34b, and the rotation center of the second damping swing arm 33b relative to the base 10 is the axis center of the second damping shaft 35b.

[0267] In addition, the second damping assembly 30b further includes a first pin shaft 38b and a second pin shaft 39b. Both sub-sliding parts 326b of the first damping swing arm 32b are sleeved on the first pin shaft 38b, and both sub-sliding parts 336b of the second damping swing arm 33b are sleeved on the second pin shaft 39. Among them, the mating relationship between the first pin shaft 38b and the sliding part 322b, and the mating relationship between the second pin shaft 39b and the sliding part 332b can both follow the relevant descriptions of the first damping assembly 30a in the above text and will not be elaborated here.

[0268] Please refer to Fig.12 as well. In this embodiment, the foldable mechanism 130 further includes a synchronization assembly 60, and the synchronization assembly 60 is installed on the base 10. There are two synchronization assemblies 60, and the two synchronization assemblies 60 are arranged at intervals along the Y-axis direction. The two synchronization assemblies 60 are respectively a first synchronization assembly 60a and a second synchronization assembly 60b. The first synchronization assembly 60a is installed on the damper 31a of the first damping assembly 30a to achieve synchronous rotation between the first damping swing arm 32a and the second damping swing arm 33a. The second synchronization assembly 60b is installed on the damper 31b of the second damping assembly 30b to achieve synchronous rotation between the first damping swing arm 32b and the second damping swing arm 33b.

[0269] In this embodiment, the first synchronization component 60a includes a first synchronization sleeve 61a, a second synchronization sleeve 62a, and a synchronization slider 63a. The synchronization slider 63a is slidably connected between the two first synchronization sleeves 61a and the second synchronization sleeve 62a. Among them, spiral grooves (not marked in the figure) are provided on both the first synchronization sleeve 61a and the second synchronization sleeve 62a, and the synchronization slider 63a is slidably connected to the spiral grooves of the first synchronization sleeve 61a and the second synchronization sleeve 62a. Specifically, the first synchronization sleeve 61a is sleeved on the first damping shaft 34a and is located between the first bracket 12 and the first damping body 36a. The second synchronization sleeve 62a is sleeved on the second damping shaft 35a and is located between the first bracket 12 and the second damping body 37a. Along the X-axis direction, the first synchronization sleeve 61a and the second synchronization sleeve 62a are arranged at intervals, and the spiral grooves of the first synchronization sleeve 61a and the second synchronization sleeve 62a are arranged opposite to each other. The synchronization slider 63a is located between the first damping shaft 34a and the second damping shaft 35a. Both ends of the synchronization slider 63a are slidably connected to the spiral grooves of the first synchronization sleeve 61a and the second synchronization sleeve 62a respectively.

[0270] When the first damping swing arm 32a drives the first damping shaft 34a to rotate relative to the base 10, the first damping shaft 34a drives the first synchronization sleeve 61a to rotate relative to the base 10. The first synchronization sleeve 61a drives the synchronization slider 63a to slide relative to the first synchronization sleeve 61a in the spiral groove of the first synchronization sleeve 61a, and then drives the synchronization slider 63a to slide relative to the second synchronization sleeve 62a in the spiral groove of the second synchronization sleeve 62a. Thus, the synchronization slider 63a drives the second synchronization sleeve 62a to rotate relative to the base 10. The second synchronization sleeve 62a drives the second damping shaft 35a to rotate relative to the base 10, and the second damping shaft 35a thereby drives the second damping swing arm 33a to rotate relative to the base 10, so as to realize the synchronous transmission between the first damping swing arm 32a and the second damping swing arm 33a.

[0271] Similarly, when the second damping swing arm 33a drives the second damping shaft 35a to rotate relative to the base 10, the first synchronization component 60a can drive the first damping swing arm 32a to rotate relative to the base 10, so as to realize the synchronous transmission between the first damping swing arm 32a and the second damping swing arm 33a.

[0272] It should be noted that the second synchronization component 60b and the first synchronization component 60a can be the same or similar components, symmetric or partially symmetric structures, or different structures. Among them, the second synchronization component 60b can be mirror-symmetric with the first synchronization component 60a. The basic structures of the various components in the second synchronization component 60b, the connection relationships between the components, and the connection relationships between the components and the components outside the component can all refer to the relevant designs of the first synchronization component 60a. The second synchronization component 60b and the first synchronization component 60a can be different in the detailed structures or positional arrangements of the components.

[0273] The second synchronization component 60b includes a first synchronization bushing 61b, a second synchronization bushing 62b, and a synchronization slider 63b. The first synchronization bushing 61b is sleeved on the first damping shaft 34b and is located between the second bracket 13 and the first damping body 36b. The second synchronization bushing 62b is sleeved on the second damping shaft 35b and is located between the second bracket 13 and the second damping body 37b. Among them, the structural of each component of the second synchronization component 60b and the connection relationship between each component and the second damping component 30b can refer to the relevant descriptions of the first synchronization component 60a.

[0274] The synchronization component 60 of the foldable mechanism 130 shown in this embodiment uses the first synchronization bushing, the second synchronization bushing, and the synchronization slider to achieve synchronous rotation. Compared with the synchronization component that uses gears to achieve synchronization, it not only reduces the number of components of the synchronization component, simplifies the structure of the foldable mechanism 130, realizes the lightweight design of the foldable terminal 1000, but also reduces the size occupied by the foldable mechanism 130 in the X-axis direction, which helps to realize the miniaturization design of the foldable terminal 1000.

[0275] In some other embodiments, the synchronization component 60 can also include multiple gears that mesh with each other to achieve synchronous rotation of the foldable mechanism 130. The present application does not specifically limit the specific structure of the synchronization component 60.

[0276] Please refer to Fig.14 , Fig.14 is Figure 7 the schematic structural diagram of the first connection component 20a in the foldable mechanism 130 shown.

[0277] The first fixing bracket 21a is provided with a receiving notch 211a, a mounting notch 212a, a first sliding hole 213a, a first avoidance groove 214a, a second sliding hole 215a, and a first guiding groove 216a. The opening of the receiving notch 211a is located on the top surface of the first fixing bracket 21a. The receiving notch 211a is recessed from the top surface to the bottom surface of the first fixing bracket 21a (i.e., the negative Z-axis direction in the figure), and penetrates through the front end face, the rear end face, and the right side face of the first fixing bracket 21a. In some other embodiments, the receiving notch 211a may not penetrate through the front end face of the first fixing bracket 21a, and / or the receiving notch 211a may not penetrate through the rear end face of the first fixing bracket 21a, and / or the receiving notch 211a may not penetrate through the right side face of the first fixing bracket 21a.

[0278] The opening of the mounting notch 212a is located on the right side face of the first fixing bracket 21a. The mounting notch 212a is recessed from the right side face to the left side face of the first fixing bracket 21a (the negative X-axis direction in the figure), and penetrates through the bottom surface of the first fixing bracket 21a and the bottom wall of the receiving notch 211a. In some other embodiments, the mounting notch 212a may not penetrate through the bottom surface of the first fixing bracket 21a, and / or the mounting notch 212a may not penetrate through the bottom wall of the receiving notch 211a.

[0279] The mounting notch 212a includes two relatively arranged groove side walls and a groove bottom wall connected between the two groove side walls. Mounting holes (not shown in the figure) are recessed in both groove side walls of the mounting notch 212a. One mounting hole is recessed from one groove side wall of the mounting notch 212a in the positive Y-axis direction, and the other mounting hole is recessed from the other groove side wall of the mounting notch 212a in the negative Y-axis direction. Among them, the two mounting holes are circular holes, and the axes of the two mounting holes are both parallel to the Y-axis direction. Exemplarily, the two mounting holes are coaxial.

[0280] A mounting boss (not shown in the figure) protrudes from the groove bottom wall of the mounting notch 212a, and the mounting boss is spaced from both groove side walls of the mounting notch 212a. The mounting boss is provided with a through hole (not shown in the figure), and the through hole penetrates through the mounting boss along the Y-axis direction. Among them, the through hole is a circular hole, and the axis of the through hole is parallel to the Y-axis direction. Exemplarily, the through hole is coaxial with the two mounting holes. In some other embodiments, the groove bottom wall of the mounting notch 212a may not protrude with a mounting boss.

[0281] In addition, the first connection assembly 20a further includes a first pin shaft 27a, and the first pin shaft 27a is installed in the through hole. The two ends of the first pin shaft 27a are respectively installed in the two mounting holes and are respectively fixedly connected to the hole walls of the two mounting holes. Among them, the first pin shaft 27a is a circular shaft, and the axis of the first pin shaft 27a is parallel to the Y-axis direction. Exemplarily, the first pin shaft 27a is coaxial with the through hole and the two mounting holes.

[0282] The first sliding hole 213a is located on the side of the mounting notch 212a facing the negative direction of the Y axis, and is spaced apart from the mounting notch 212a. The opening of the first sliding hole 213a is located on the right side of the first fixing frame 21a. The first sliding hole 213a is recessed from the right side of the first fixing frame 21a to the left side, and passes through the left side of the first fixing frame 21a, the bottom surface of the first fixing frame 21a, and the bottom wall of the groove of the receiving notch 211a. It should be understood that the first sliding hole 213a is not limited to the square hole shown in the figure, and can also be a round hole or a special-shaped hole.

[0283] In some other embodiments, the first sliding hole 213a may not penetrate the left side surface of the first fixing frame 21a, and / or the first sliding hole 213a may not penetrate the bottom surface of the first fixing frame 21a, and / or the first sliding hole 213a may not penetrate the bottom wall of the groove of the receiving notch 211a.

[0284] The first avoidance groove 214a is located on the side of the first sliding hole 213a away from the installation notch 212a, and is spaced apart from the first sliding hole 213a. The opening of the first avoidance groove 214a is located on the right side of the first fixing frame 21a. The first avoidance groove 214a is recessed from the right side of the first fixing frame 21a to the left side, and passes through the left side, top surface and bottom wall of the first fixing frame 21a of the receiving notch 211a.

[0285] In some other embodiments, the first avoidance groove 214a may not penetrate the left side surface of the first fixing frame 21a, and / or the first avoidance groove 214a may not penetrate the top surface of the first fixing frame 21a, and / or the first avoidance groove 214a may not penetrate the bottom wall of the receiving notch 211a.

[0286] The second sliding hole 215a is located on the side of the first avoidance groove 214a away from the first sliding hole 213a. The opening of the second sliding hole 215a is located on the rear end surface of the first fixing frame 21a. The second sliding hole 215a is recessed from the front end surface of the first fixing frame 21a to the rear end surface (the positive direction of the Y axis in the figure), and passes through the groove side wall of the first avoidance groove 214a to communicate with the first avoidance groove 214a. Among them, the second sliding hole 215a is a strip hole, and the angle between the extension direction of the second sliding hole 215a and the X-axis direction is an acute angle.

[0287] The opening of the first guide groove 216a is located at the groove bottom wall of the receiving notch 211a. The first guide groove 216a is recessed from the groove bottom wall of the receiving notch 211a toward the bottom surface of the first fixing frame 21a (negative direction of the Z axis in the figure), and passes through the left side surface of the first fixing frame 21a. The first guide groove 216a is an arc groove. That is, the groove bottom wall of the first guide groove 216a is an arc surface. In some other embodiments, the first guide groove 216a may not pass through the left side surface.

[0288] In this embodiment, there are two first guiding grooves 216a. One first guiding groove 216a is located on the side of the mounting notch 212a away from the first sliding hole 213a, is spaced from the mounting notch 212a, and also penetrates through the front end face of the first fixing bracket 21a. The other first guiding groove 216a is located between the first sliding hole 213a and the first avoiding groove 214a, is spaced from both the first sliding hole 213a and the first avoiding groove 214a, and also penetrates through the top face of the first fixing bracket 21a. In some other embodiments, the first guiding groove 216a may not penetrate through the front end face of the first fixing bracket 21a, and / or the first guiding groove 216a may not penetrate through the top face of the first fixing bracket 21a, or there may be one or more than three first guiding grooves 216a.

[0289] In this embodiment, the first main swing arm 23a includes a rotating part 231a, a connecting part 232a, and a sliding part 233a. The connecting part 232a is connected between the rotating part 231a and the sliding part 233a. Among them, the rotating part 231a, the connecting part 232a, and the sliding part 233a can be integrally formed.

[0290] Please refer to Fig. 9 , the structure of the rotating part 231a is adapted to the structure of the mounting notch 212a. The rotating part 231a includes two sub-rotating parts 234a, and the two sub-rotating parts 234a are arranged at intervals along the Y-axis direction. The two sub-rotating parts 234a can be sleeved on the first pin shaft 27a and can rotate relative to the first pin shaft 27a to realize the rotational connection between the rotating part 231a and the first pin shaft 27a, and further realize the rotational connection between the rotating part 231a of the first main swing arm 23a and the first fixing bracket 21a.

[0291] The connecting part 232a is in the shape of a flat plate. The structure of the sliding part 233a is adapted to the structure of the first sliding groove 101a. Among them, the bottom surface of the sliding part 233a is an arc surface. The sliding part 233a is provided with a first sliding groove (not labeled in the figure) and a second sliding groove (not labeled in the figure). The opening of the first sliding groove is located on the front end face of the sliding part 233a. The first sliding groove is recessed in the direction from the front end face of the sliding part 233a to the rear end face (the negative Y-axis direction in the figure). Exemplarily, the first sliding groove also penetrates through the top face of the sliding part 233a. Among them, the first sliding groove is an arc groove adapted to the first slider 121a, and the axis of the first sliding groove is parallel to the Y-axis direction.

[0292] The opening of the second sliding groove is located on the rear end face of the sliding part 233a. The second sliding groove is recessed in the direction from the rear end face of the sliding part 233a to the front end face (the positive Y-axis direction in the figure). Exemplarily, the second sliding groove also penetrates through the top face of the sliding part 233a. Among them, the second sliding groove is an arc groove adapted to the second slider 121b, and the second sliding groove and the first sliding groove share the same axis.

[0293] The first slider 121a can slide and rotate within the first sliding groove, and the second slider 121b can slide and rotate within the second sliding groove. Thus, the sliding portion 233a can slide and rotate within the first sliding slot 101a, so as to achieve the sliding and rotational connection between the sliding portion 233a of the first main swing arm 23a and the base 10. At this time, the first sliding groove is coaxial with the first slider 121a, and the second sliding groove is coaxial with the second slider 121b.

[0294] In addition, the sliding portion 233a is further provided with a first support groove 235a, and the opening of the first support groove 235a is located on the top surface of the sliding portion 233a. The sliding slot 237a is recessed from the top surface to the bottom surface of the sliding portion 233a (the negative Z-axis direction in the figure) and penetrates through the right side surface of the sliding portion 233a. Among them, the sliding slot 237a is square. In some other embodiments, the sliding slot 237a can also be circular or of other special shapes.

[0295] In this embodiment, the first auxiliary swing arm 25a includes a first sliding portion 251a, a first transition portion 252a, a first rotating portion 253a, and a first auxiliary portion 254a. The first transition portion 252a is fixedly connected between the first rotating portion 253a and the first sliding portion 251a, and the first auxiliary portion 254a is fixedly connected to one end of the first rotating portion 253a facing away from the first transition portion 252a. Among them, the first sliding portion 251a, the first transition portion 252a, the first rotating portion 253a, and the first auxiliary portion 254a can be integrally formed.

[0296] The first sliding portion 251a is in the shape of a flat plate. The structure of the first sliding portion 251a is adapted to the structure of the first sliding hole 213a. The first sliding portion 251a can be installed in the first sliding hole 213a and can slide relative to the first fixing frame 21a within the first sliding hole 213a, so as to achieve the sliding connection between the first sliding portion 251a and the first fixing frame 21a.

[0297] In this embodiment, the first sliding portion 251a includes a sliding body 255a and a first pin shaft 256a. The sliding body 255a is fixedly connected to one end of the first transition portion 252a facing away from the rotating portion 251. The first pin shaft 256a is fixedly connected to the sliding body 255a and is spaced from the first transition portion 252a. The sliding body 255a is provided with an avoidance notch (not marked in the figure), and the opening of the avoidance notch is located on the top surface of the sliding body 255a. The avoidance notch is recessed from the top surface to the bottom surface of the sliding body 255a and penetrates through the left side surface of the sliding body 255a. Among them, the avoidance notch is strip-shaped, and the extending direction of the avoidance notch is parallel to the X-axis direction.

[0298] The first pin shaft 256a is fixedly connected to the top surface of the sliding body 255a and is located on the top side of the avoidance notch. Exemplarily, the first sliding portion 251a further includes two fixing portions (not labeled in the figure). In the Y-axis direction, both fixing portions are fixedly connected to the top surface of the sliding body 255a and are respectively located on opposite sides of the avoidance notch. Both ends of the first pin shaft 256a are fixedly connected to the two fixing portions respectively to achieve the fixed connection between the first pin shaft 256a and the sliding body 255a. Among them, the first pin shaft 256a is a circular shaft, and the axis of the first pin shaft 256a is parallel to the Y-axis direction. It should be noted that the two fixing portions can be fixedly connected to the top surface of the sliding body 255a by welding or the like, or the two fixing portions can be integrally formed with the sliding body 255a.

[0299] The structure of the first rotating portion 253a is adapted to the structure of the first rotating groove 103a. The first rotating portion 253a is provided with a pin hole (not labeled in the figure), and the opening of the pin hole is located on the front end face of the first rotating portion 253a. The pin hole is recessed from the front end face of the first rotating portion 253a towards the rear end face (the positive Y-axis direction shown in the figure) and penetrates through the rear end face of the first rotating portion 253a. That is, the pin hole penetrates through the first rotating portion 253a in the Y-axis direction. Exemplarily, the pin hole is a circular hole.

[0300] The structure of the first auxiliary portion 254a is adapted to the structure of the first avoidance notch 126. The first auxiliary portion 254a is provided with a first auxiliary groove 257a, and the opening of the first auxiliary groove 257a is located on the rear end face of the first auxiliary portion 254a. The first auxiliary groove 257a is recessed from the rear end face of the first auxiliary portion 254a towards the front end face (the negative Y-axis direction shown in the figure) and penetrates through the front end face of the first auxiliary portion 254a. That is, the first auxiliary groove 257a penetrates through the first auxiliary portion 254a in the Y-axis direction. Exemplarily, the first auxiliary groove 257a also penetrates through the hole wall of the pin hole of the first rotating portion 253a to communicate with the pin hole of the first rotating portion 253a. In some other embodiments, the first auxiliary groove 257a may not penetrate through the hole wall of the pin hole of the first rotating portion 253a, and at this time, the first auxiliary groove 257a does not communicate with the pin hole of the first rotating portion 253a.

[0301] In this embodiment, the first auxiliary groove 257a is a strip-shaped hole, and the included angle between the extending direction of the first auxiliary groove 257a and the Y-axis direction is an acute angle. The first auxiliary groove 257a has a flattened position (not labeled in the figure) and a folded position (not labeled in the figure), and the folded position is located on the top side of the flattened position (i.e., the side facing the positive Z-axis direction shown in the figure). Among them, the flattened position is located on the top side of the first auxiliary groove 257a, and the folded position is located on the bottom side of the first auxiliary groove 257a. Exemplarily, the extending direction of the first auxiliary groove 257a is linear. In some other embodiments, the extending direction of the first auxiliary groove 257a may also be an arc-shaped line, and the present application does not make specific limitations on this.

[0302] In addition, the first connecting component 20a further includes a first rotating shaft 15, and the first rotating shaft 15 is installed in the first rotating groove 103a. Specifically, both ends of the first rotating shaft 15 are installed in two first rotating shaft holes of the first bracket 12 and are respectively fixedly connected to the hole walls of the first rotating shaft holes. Among them, the first rotating shaft 15 is a circular shaft. Exemplarily, the first rotating shaft 15 is coaxial with both first rotating shaft holes. That is, the axis of the first rotating shaft 15 coincides with the axes of both first rotating shaft holes.

[0303] The first rotating part 253a is sleeved on the first rotating shaft 15. That is, the first rotating shaft 15 is installed in the pin hole of the first rotating part 253a. The first rotating part 253a can rotate relative to the first rotating shaft 15, so that the first rotating part 253a can rotate in the first rotating groove 103a to achieve the rotational connection between the first rotating part 253a and the base 10. The rotation center of the first rotating part 253a of the first secondary swing arm 25a relative to the base 10 is the first center. That is, the rotation center of the first secondary swing arm 25a relative to the base 10 is the first center. Among them, the first center is the axis of the first rotating shaft 15.

[0304] In this embodiment, the first center and the second center are spaced apart from each other. Specifically, the first center is located outside the second center. That is, the second center is located inside the first center. That is to say, the second center is located on the side of the first center close to the base 10. In some other embodiments, the second center may also be located outside, on the top side or on the bottom side of the first center, or the second center may be coaxial with the first center.

[0305] In the foldable mechanism 130 shown in the present application, when the first fixing frame 21a rotates relative to the base 10, it drives the first main swing arm 23a to rotate relative to the first fixing frame 21a, slide relative to the base 10, and also drives the first secondary swing arm 25a to slide relative to the first fixing frame 21a and rotate relative to the base 10, and also drives the first damping swing arm 32a to slide and rotate relative to the first fixing frame 21a and rotate relative to the damping member 31a. Since the first center and the second center are spaced apart from each other, that is, the rotation centers of the first secondary swing arm 25a and the first damping swing arm 32a do not coincide, the assembly position of the first damping swing arm 32a on the base 10 does not need to be adapted to the assembly position of the first secondary swing arm 25a on the base 10, which improves the assembly freedom between the first damping swing arm 32a and the base 10 and helps to reduce the size of the foldable mechanism 130.

[0306] In addition, the first auxiliary part 254a is located in the first avoidance notch 126 and is spaced apart from the groove wall of the first avoidance notch 126. That is, the first avoidance notch 126 can avoid the first auxiliary part 254a, preventing interference between the first auxiliary part 254a and the base 10 when the first auxiliary swing arm 25a rotates relative to the base 10, and ensuring the smooth rotation of the first auxiliary swing arm 25a relative to the base 10.

[0307] The second fixing bracket 22a is provided with a receiving notch 221a, an installation notch 222a, a first sliding hole 223a, a second avoidance groove 224a, a second sliding hole 225a, and a second guiding groove 226a. In this embodiment, the structures of the receiving notch 221a, the installation notch 222a, the first sliding hole 223a, the second avoidance groove 224a, the second sliding hole 225a, and the second guiding groove 226a can respectively refer to the relevant descriptions of the receiving notch 211a, the installation notch 212a, the first sliding hole 213a, the first avoidance groove 214a, the second sliding hole 215a, and the first guiding groove 216a in the first fixing bracket 21a, and will not be elaborated here. Among them, the receiving notch 221a also penetrates the left side surface of the second fixing bracket 22a. The openings of the installation notch 222a and the first sliding hole 223a are both located on the left side surface of the second fixing bracket 22a.

[0308] In addition, the first connection assembly 20a further includes a second pin shaft 28a. Among them, the structure of the second pin shaft 28a and the cooperation relationship between the second pin shaft 28a and the second fixing bracket 22a can refer to the relevant descriptions of the structure of the first pin shaft 27a and the cooperation relationship between the first pin shaft 27a and the first fixing bracket 21a in the above text, and will not be elaborated here.

[0309] The second main swing arm 24a includes a rotating part 241a, a connecting part 242a, and a sliding part 243a. In this embodiment, the structure of the second main swing arm 24a and the cooperation relationship between the second main swing arm 24a and the second fixing bracket 22a and the base 10 can refer to the relevant descriptions of the structure of the first main swing arm 23a and the cooperation relationship between the first main swing arm 23a and the first fixing bracket 21a and the base 10.

[0310] Please refer to Fig. 9 , the structure of the rotating part 241a is adapted to the structure of the installation notch 222a. Two sub-rotating parts (not labeled in the figure) of the rotating part 241a can be sleeved on the second pin shaft 28a and can rotate relative to the second pin shaft 28a to achieve the rotational connection between the rotating part 241a and the second pin shaft 28a, and further achieve the rotational connection between the second main swing arm 24a and the second fixing bracket 22a.

[0311] The structure of the sliding part 243a is adapted to the structure of the second sliding groove 102a. Among them, the sliding part 243a is provided with a third sliding groove (not labeled in the figure), a fourth sliding groove (not labeled in the figure) and a second supporting groove 245a. The third slider 121c can slide and rotate in the third sliding groove, and the fourth slider 121d can slide and rotate in the fourth sliding groove. Thus, the sliding part 243a can slide and rotate in the second sliding groove 102a to realize the sliding and rotational connection between the second main swing arm 24a and the base 10. At this time, the third sliding groove and the third slider 121c are coaxial, and the fourth sliding groove and the fourth slider 121d are coaxial.

[0312] The second secondary swing arm 26a includes a second sliding part 261a, a second transition part 262a, a second rotating part 263a and a second auxiliary part 264a. In this embodiment, for the structure of the second secondary swing arm 26a and the cooperation relationship between the second secondary swing arm 26a, the second fixing frame 22a and the base 10, reference can be made to the relevant description of the structure of the first secondary swing arm 25a and the cooperation relationship between the first secondary swing arm 25a, the first fixing frame 21a and the base 10.

[0313] Among them, the structure of the second sliding part 261a is adapted to the structure of the first sliding hole 223a. The second sliding part 261a includes a sliding body 265a and a second pin shaft 266a, and the second pin shaft 266a is fixedly connected to the sliding body 265a. The second sliding part 261a can be installed in the first sliding hole 223a and can slide relative to the second fixing frame 22a in the first sliding hole 223a to realize the sliding connection between the second secondary swing arm 26a and the second fixing frame 22a.

[0314] The structure of the second rotating part 263a is adapted to the structure of the second rotating groove 104a, and the structure of the second auxiliary part 264a is adapted to the structure of the second avoiding notch 127. Among them, the second auxiliary part 264a is provided with a second auxiliary groove 267a. In addition, the first connecting component 20a further includes a second rotating shaft 16, and the second rotating shaft 16 is installed in the second rotating groove 104a. Specifically, both ends of the second rotating shaft 16 are installed in two second rotating shaft holes of the first bracket 12 and are respectively fixedly connected to the hole walls of the second rotating shaft holes. Among them, for the structure of the second rotating shaft 16 and the cooperation relationship between the second rotating shaft 16 and the base 10, reference can be made to the relevant description of the structure of the first rotating shaft 15 and the cooperation relationship between the first rotating shaft 15 and the base 10.

[0315] The second rotating part 263a can be sleeved on the second rotating shaft 16 and can rotate relative to the second rotating shaft 16. Thus, the second rotating part 263a can rotate within the second rotating groove 104a to achieve the rotational connection between the second secondary swing arm 26a and the base 10. The rotation center of the second rotating part 263a of the second secondary swing arm 26a relative to the base 10 is the third center. That is, the rotation center of the second secondary swing arm 26a relative to the base 10 is the third center. Among them, the third center is the axis center of the second rotating shaft 16.

[0316] In this embodiment, the third center and the fourth center are spaced apart from each other. Specifically, the third center is located outside the fourth center. That is, the fourth center is located inside the third center. Also, that is, the fourth center is located on the side of the third center close to the base 10. In some other embodiments, the fourth center can also be located outside, on the top side, or on the bottom side of the third center, or the fourth center can be coaxial with the third center.

[0317] In the foldable mechanism 130 shown in the present application, when the second fixed frame 22a rotates relative to the base 10, it drives the second main swing arm 24a to rotate relative to the second fixed frame 22a, slide relative to the base 10, and also drives the second secondary swing arm 26a to slide relative to the second fixed frame 22a and rotate relative to the base 10, and further drives the second damping swing arm 33a to slide and rotate relative to the second fixed frame 22a and rotate relative to the damper 31a. Since the third center and the fourth center are spaced apart from each other, that is, the rotation centers of the second secondary swing arm 26a and the second damping swing arm 33a do not coincide, the assembly position of the second damping swing arm 33a on the base 10 does not need to be adapted to the assembly position of the second secondary swing arm 26a on the base 10, which improves the assembly freedom degree between the second damping swing arm 33a and the base 10 and helps to reduce the size of the foldable mechanism 130.

[0318] In addition, at least a part of the second auxiliary part 264a can be located in the second avoidance notch 127 and is spaced from the groove wall of the second avoidance notch 127. That is, the second avoidance notch 127 can avoid the second auxiliary part 264a to prevent interference between the second auxiliary part 264a and the base 10 when the second secondary swing arm 26a rotates relative to the base 10, ensuring the smooth rotation of the second secondary swing arm 26a relative to the base 10.

[0319] Please refer to Fig.12, one sub-sliding part 326a of the first damping swing arm 32a is located in the first avoidance groove 214a, and the other sub-sliding part 326a is located at the rear side of the first fixing frame 21a. The second sliding hole 215a is located between the two sub-sliding parts 326a and is communicated with the pin holes of the two sub-sliding parts 326a. The first pin shaft 38a is also installed in the second sliding hole 215a and can slide and rotate relative to the first fixing frame 21a in the second sliding hole 215a to drive the sliding part 322a to slide and rotate relative to the first fixing frame 21a, so as to realize the sliding and rotational connection between the first damping swing arm 32a and the first fixing frame 21a.

[0320] In some other embodiments, the first pin shaft 38a can also slide relative to the first fixing frame 21a in the second sliding hole 215a to drive the sliding part 322a to slide relative to the first fixing frame 21a. Moreover, the sliding part 322a can also rotate relative to the first pin shaft 38a to realize the relative rotation between the sliding part 322a and the first fixing frame 21a, so as to realize the sliding and rotational connection between the first damping swing arm 32a and the first fixing frame 21a.

[0321] One sub-sliding part 336a of the second damping swing arm 33a is located in the second avoidance groove 224a, and the other sub-sliding part 336a is located at the rear side of the second fixing frame 22a. The second sliding hole 225a is located between the two sub-sliding parts 336a and is communicated with the pin holes of the two sub-sliding parts 326a. The second pin shaft 39a is also installed in the second sliding hole 225a and can slide and rotate relative to the second fixing frame 22a in the second sliding hole 225a to drive the sliding part 332a to slide and rotate relative to the second fixing frame 22a, so as to realize the sliding and rotational connection between the second damping swing arm 33a and the second fixing frame 22a.

[0322] In some other embodiments, the second pin shaft 39a can also slide relative to the second fixing frame 22a in the second sliding hole 225a to drive the sliding part 332a to slide relative to the second fixing frame 22a. Moreover, the sliding part 332a can also rotate relative to the second pin shaft 39a to realize the relative rotation between the sliding part 332a and the second fixing frame 22a, so as to realize the sliding and rotational connection between the second damping swing arm 33a and the second fixing frame 22a.

[0323] When the first fixing bracket 21a rotates relative to the base 10, the first fixing bracket 21a drives the first main swing arm 23a to rotate relative to the first fixing bracket 21a, and slide and rotate relative to the base 10. It also drives the first auxiliary swing arm 25a to slide relative to the first fixing bracket 21a, and rotate relative to the base 10. It further drives the first damping swing arm 32a to slide and rotate relative to the first fixing bracket 21a, and rotate relative to the base 10. At this time, the first synchronization component 60a can drive the second damping swing arm 33a to rotate relative to the base 10, and then drive the second damping swing arm 34 to slide and rotate relative to the second fixing bracket 22a, and then drive the second fixing bracket 21 to rotate relative to the base 10, so as to realize the synchronous rotation of the first fixing bracket 21a and the second fixing bracket 22a relative to the base 10.

[0324] Similarly, when the second fixing bracket 22a rotates relative to the base 10, the second fixing bracket 22a drives the second main swing arm 24a to rotate relative to the second fixing bracket 22a, and slide and rotate relative to the base 10. It also drives the second auxiliary swing arm 26a to slide relative to the second fixing bracket 22a, and rotate relative to the base 10. It further drives the second damping swing arm 32 to slide and rotate relative to the second fixing bracket 22a, and rotate relative to the base 10. At this time, the first synchronization component 60a can drive the first damping swing arm 32a to rotate relative to the base 10, and then drive the first damping swing arm 32a to slide and rotate relative to the first fixing bracket 21a, and then drive the first fixing bracket 21a to rotate relative to the base 10, so as to realize the synchronous rotation of the first fixing bracket 21a and the second fixing bracket 22a relative to the base 10.

[0325] Please refer to Fig.15 , Fig.15 which Figure 7 is a schematic structural diagram of the second connection component 20b in the foldable mechanism 130 shown.

[0326] The first fixing bracket 21b is provided with a receiving notch 211b, an installation notch 212b, a first sliding hole 213b, a first avoiding groove 214b, a second sliding hole 215b and a first guiding groove 216b. In this embodiment, the structures of the receiving notch 211b, the installation notch 212b, the first sliding hole 213b, the first avoiding groove 214b, the second sliding hole 215b and the first guiding groove 216b can refer to the relevant descriptions of the first fixing bracket 21a in the first connection component 20a above, and will not be elaborated here. Among them, the first sliding hole 213b is located on the side of the installation notch 212b facing the positive direction of the Y axis, the opening of the second sliding hole 215b is located on the front end face of the first fixing bracket 21b, and one first guiding groove 216b also penetrates through the rear end face of the first fixing bracket 21b.

[0327] The first main swing arm 23b includes a rotating portion 231b, a connecting portion 232b, and a sliding portion 233b. In this embodiment, for the structure of the first main swing arm 23b and the mating relationship between the first main swing arm 23b, the first fixing bracket 21b, and the base 10, reference may be made to the relevant descriptions of the structure of the first main swing arm 23a in the first connecting assembly 20a above and the mating relationship between the first main swing arm 23a, the first fixing bracket 21a, and the base 10.

[0328] Please refer to Fig.10 , the structure of the rotating portion 231b is adapted to the structure of the mounting notch 212b. Two sub-rotating portions (not labeled in the figure) of the rotating portion 231b can be sleeved on the first pin shaft 27b and can rotate relative to the first pin shaft 27b to achieve the rotational connection between the rotating portion 231b and the first pin shaft 27b, and further achieve the rotational connection between the first main swing arm 23b and the first fixing bracket 21b.

[0329] The structure of the sliding portion 233b is adapted to the structure of the first sliding groove 101b. Among them, the sliding portion 233b is provided with a first sliding groove (not labeled in the figure), a second sliding groove (not labeled in the figure), and a first support groove 235b. The first slider 131a can slide and rotate in the first sliding groove, and the second slider 131b can slide and rotate in the second sliding groove, so that the sliding portion 233b can slide and rotate in the first sliding groove 101b to achieve the sliding and rotational connection between the first main swing arm 23b and the base 10. At this time, the first sliding groove is coaxial with the first slider 131a, and the second sliding groove is coaxial with the second slider 131b.

[0330] The first auxiliary swing arm 25b includes a first sliding portion 251b, a first transition portion 252b, a first rotating portion 253b, and a first auxiliary portion 254b. In this embodiment, for the structure of the first auxiliary swing arm 25b and the mating relationship between the first auxiliary swing arm 25b, the first fixing bracket 21b, and the base 10, reference may be made to the relevant descriptions of the structure of the first auxiliary swing arm 25a in the first connecting assembly 20a above and the mating relationship between the first auxiliary swing arm 25a, the first fixing bracket 21a, and the base 10.

[0331] Among them, the structure of the first sliding portion 251b is adapted to the structure of the first sliding hole 213b. The first sliding portion 251b can be installed in the first sliding hole 213b and can slide relative to the first fixing bracket 21b in the first sliding hole 213 to achieve a sliding connection between the first auxiliary swing arm 25b and the first fixing bracket 21b. The structure of the first rotating portion 253b is adapted to the structure of the first rotating groove 103b, and the structure of the first auxiliary portion 254b is adapted to the structure of the first avoidance notch 136. The first rotating portion 253b is sleeved on the third rotating shaft 17 and can rotate relative to the third rotating shaft 17, so that the first rotating portion 253b can rotate in the first rotating groove 103b to achieve a rotating connection between the first auxiliary swing arm 25b and the base 10. In addition, the first auxiliary portion 254b is located in the first avoidance notch 136 and is spaced from the groove wall of the first avoidance notch 136.

[0332] The second fixing bracket 22b is provided with a receiving notch 221b, an installation notch 222b, a first sliding hole 223b, a second avoidance groove 224b, a second sliding hole 225b, and a second guiding groove 226b. In this embodiment, the structures of the receiving notch 221b, the installation notch 222b, the first sliding hole 223b, the second avoidance groove 224b, the second sliding hole 225b, and the second guiding groove 226b can refer to the relevant descriptions of the second fixing bracket 22a in the first connection assembly 20a above and will not be elaborated here. Among them, the first sliding hole 223b is located on the side of the installation notch 212b facing the positive direction of the Y axis, the opening of the second sliding hole 225b is located on the front end face of the second fixing bracket 22b, and one second guiding groove 226b also penetrates the rear end face of the second fixing bracket 22b.

[0333] The second main swing arm 24b includes a rotating portion 241b, a connecting portion 242b, and a sliding portion 243b. Among them, the structure of the second main swing arm 24b and the cooperation relationship between the second main swing arm 24b and the second fixing bracket 22b and the base 10 can refer to the relevant descriptions of the structure of the second main swing arm 24a in the first connection assembly 20a above and the cooperation relationship between the second main swing arm 24a and the second fixing bracket 22a and the base 10.

[0334] Among them, the structure of the rotating part 241b is adapted to the structure of the mounting notch 222b. The two sub-rotating parts of the rotating part 241b can be sleeved on the second pin shaft 28b and can rotate relative to the second pin shaft 28b to realize the rotational connection between the rotating part 241b and the second pin shaft 28b, and further realize the rotational connection between the second main swing arm 24b and the second fixing frame 22b. The structure of the sliding part 243b is adapted to the structure of the second sliding groove 102b. Among them, the sliding part 243b is provided with a first sliding groove (not marked in the figure), a second sliding groove (not marked in the figure) and a second supporting groove 245b. The third slider 131c can slide and rotate in the third sliding groove, and the fourth slider 131d can slide and rotate in the fourth sliding groove, so that the sliding part 243b can slide and rotate in the second sliding groove 102b to realize the sliding and rotational connection between the second main swing arm 24b and the base 10. At this time, the third sliding groove and the third slider 131c are coaxial, and the fourth sliding groove and the fourth slider 131d are coaxial.

[0335] The second auxiliary swing arm 26b includes a second sliding part 261b, a second transition part 262b, a second rotating part 263b and a second auxiliary part 264b. In this embodiment, for the structure of the second auxiliary swing arm 26b and the cooperation relationship between the second auxiliary swing arm 26b and the second fixing frame 22b and the base 10, reference may be made to the relevant descriptions of the structure of the second auxiliary swing arm 26a in the first connection assembly 20a and the cooperation relationship between the second auxiliary swing arm 26a and the second fixing frame 22a and the base 10.

[0336] Among them, the structure of the second sliding part 261b is adapted to the structure of the first sliding hole 223b. The second sliding part 261b can be installed in the first sliding hole 223b and can slide relative to the second fixing frame 22b in the first sliding hole 223 to realize the sliding connection between the second auxiliary swing arm 26b and the second fixing frame 22b. The structure of the second rotating part 263b is adapted to the structure of the second rotating groove 104b, and the structure of the second auxiliary part 264b is adapted to the structure of the second avoiding notch 137. The second rotating part 263b can be sleeved on the fourth rotating shaft 18 and can rotate relative to the fourth rotating shaft 18, so that the second rotating part 263b can rotate in the second rotating groove 104b to realize the rotational connection between the second auxiliary swing arm 26b and the base 10. In addition, the second auxiliary part 264b is located in the second avoiding notch 137 and is spaced from the groove wall of the second avoiding notch 137.

[0337] Please refer to Fig.13, the mating relationship between the second damping component 30b and the second connecting component 20b can refer to the relevant description of the mating relationship between the first damping component 30a and the first connecting component 20a in the above text, which will not be elaborated here. Among them, the second sliding hole 215b of the first fixing bracket 21b is located between the two sub-sliding portions 326b of the first damping swing arm 32b and communicates with the pin holes of the two sub-sliding portions 326b. The first pin shaft 38b is also installed in the second sliding hole 215b and can slide and rotate relative to the first fixing bracket 21b in the second sliding hole 215b to drive the sliding portion 322b to slide and rotate relative to the first fixing bracket 21b, thereby realizing the sliding and rotational connection between the first damping swing arm 32b and the first fixing bracket 21b.

[0338] The second sliding hole 225b of the second damping swing arm 33b is located between the two sub-sliding portions 336b and communicates with the pin holes of the two sub-sliding portions 326b. The second pin shaft 39b is also installed in the second sliding hole 225b and can slide and rotate relative to the second fixing bracket 22b in the second sliding hole 225b to drive the sliding portion 332b to slide and rotate relative to the second fixing bracket 22b, thereby realizing the sliding and rotational connection between the second damping swing arm 33b and the second fixing bracket 22b.

[0339] Please refer to Fig.16 , Fig.16 is Figure 7 a schematic structural view of the third connecting component 20c in the foldable mechanism 130 shown.

[0340] The first fixing bracket 21c is provided with a receiving notch 211c, an installation notch 212c and a first guiding groove 213c. In this embodiment, the structures of the receiving notch 211c, the installation notch 212c and the first guiding groove 213c can refer to the relevant description of the first fixing bracket 21a in the first connecting component 20a in the above text (such as Fig. 20 shown), which will not be elaborated here. Among them, the installation notch 212c is located in the middle of the first fixing bracket 21c. Along the Y-axis direction, the two first guiding grooves 213c are respectively located on the opposite sides of the installation notch 212c and are both spaced from the installation notch 212c. One first guiding groove 213c also penetrates the front end face of the first fixing bracket 21c, and one first guiding groove 213c also penetrates the rear end face of the first fixing bracket 21c.

[0341] In addition, the first fixing bracket 21c is further provided with a limiting groove 214c, and the opening of the limiting groove 214c is located at the bottom wall of the receiving notch 211c. The limiting groove 214c is recessed from the bottom wall of the receiving notch 211c towards the bottom surface of the first fixing bracket 21c (the negative Z-axis direction in the figure) and penetrates through the right side surface of the first fixing bracket 21c. Among them, the mounting notch 212c also penetrates through the side wall of the limiting groove 214c to communicate with the limiting groove 214c. It should be understood that the shape of the limiting groove 214c should not be limited to Fig.24 the oval shape shown, and it can also be circular, square or other irregular shapes.

[0342] In addition, the first fixing bracket 21c is further provided with a limiting post 215c, and the limiting post 215c is arranged on the bottom wall of the limiting groove 214c. Specifically, the limiting post 215c is arranged in the middle of the bottom wall of the limiting groove 214c. The limiting post 215c extends from the bottom wall of the limiting groove 214c towards the top surface of the first fixing bracket 21c (the positive Z-axis direction in the figure). It should be understood that the shape of the limiting post 215c is not limited to only Fig.24 the cylindrical shape shown, and it can also be a square post shape or other irregular shapes.

[0343] The first main swing arm 23c includes a rotating part 231c, a connecting part 232c and a sliding part 233c. In this embodiment, for the structure of the first main swing arm 23c and the cooperation relationship between the first main swing arm 23c and the first fixing bracket 21c and the base 10, reference can be made to the relevant descriptions of the structure of the first main swing arm 23a in the first connection assembly 20a above and the cooperation relationship between the first main swing arm 23a and the first fixing bracket 21a and the base 10.

[0344] Please refer to Fig.11 together. The structure of the rotating part 231c is adapted to the structure of the mounting notch 212c. Two sub-rotating parts of the rotating part 231c (not marked in the figure) can be sleeved on the first pin shaft 25c and can rotate relative to the first pin shaft 25c to realize the rotational connection between the rotating part 231c and the first pin shaft 25c, and further realize the rotational connection between the first main swing arm 23c and the first fixing bracket 21c.

[0345] The structure of the sliding part 233c is adapted to the structure of the first sliding groove 101c. Among them, the sliding part 233c is provided with a first sliding groove (not marked in the figure), a second sliding groove (not marked in the figure) and a first support groove 235c. The first slider 141a can slide and rotate in the first sliding groove, and the second slider 141b can slide and rotate in the second sliding groove. Thus, the sliding part 233c can slide and rotate in the first sliding groove 101c to realize the sliding and rotational connection between the first main swing arm 23c and the base 10. At this time, the first sliding groove is coaxial with the first slider 141a, and the second sliding groove is coaxial with the second slider 141b.

[0346] In addition, the structure of the connecting portion 232c is adapted to the structure of the limiting groove 214c. The connecting portion 232c is provided with a limiting hole 237c, and the opening of the limiting hole 237c is located on the top surface of the connecting portion 232c. The limiting hole 237c is recessed in the direction from the top surface to the bottom surface of the connecting portion 232a (the negative Z-axis direction in the figure), and penetrates the bottom surface of the connecting portion 232a. That is, the limiting hole 237c penetrates the connecting portion 232a along the thickness direction of the connecting portion 232a.

[0347] Among them, the structure of the limiting hole 237c is adapted to the structure of the limiting post 215c. When the third connecting assembly 20c is in a flattened state, the limiting post 215 can be installed in the limiting hole 237c, improving the assembly accuracy between the first main swing arm 23c and the first fixing bracket 21c. The limiting groove 214c can accommodate a part of the connecting portion 232c to support the connecting portion 232c, ensuring the service strength of the first main swing arm 23c and contributing to improving the service life of the first main swing arm 23c.

[0348] The second fixing bracket 22c is provided with a receiving notch 221c, an installation notch 222c, a second guiding groove 223c, and a limiting groove 224c. In this embodiment, the structures of the receiving notch 221c, the installation notch 222c, the second guiding groove 223c, and the limiting groove 224c can all refer to the relevant descriptions of the first fixing bracket 21c and will not be elaborated here. Among them, the limiting groove 224c also penetrates the left side surface of the second fixing bracket 22c. In addition, the second fixing bracket 22c is further provided with a limiting post 225c, and the limiting post 225c is arranged on the bottom wall of the limiting groove 224c.

[0349] The second main swing arm 24c includes a rotating portion 241c, a connecting portion 242c, and a sliding portion 243c. In this embodiment, the structure of the second main swing arm 24c and the cooperation relationship between the second main swing arm 24c and the second fixing bracket 22c and the base 10 can refer to the relevant descriptions of the structure of the first main swing arm 23c and the cooperation relationship between the first main swing arm 23c and the first fixing bracket 21c and the base 10.

[0350] Among them, the structure of the rotating portion 241c is adapted to the structure of the installation notch 222c. Two sub-rotating portions of the rotating portion 241c (not labeled in the figure) can be sleeved on the second pin shaft 26c and can rotate relative to the second pin shaft 26c to realize the rotational connection between the rotating portion 241c and the second pin shaft 27c, and further realize the rotational connection between the second main swing arm 24c and the second fixing bracket 22c.

[0351] The structure of the sliding part 243c is adapted to the structure of the second sliding groove 102c. Among them, the sliding part 243c is provided with a third sliding groove (not labeled in the figure), a fourth sliding groove (not labeled in the figure), and a second support groove 245c. The third slider 141c can slide and rotate in the third sliding groove, and the fourth slider 141d can slide and rotate in the fourth sliding groove. Thus, the sliding part 243c can slide and rotate in the second sliding groove 102c to achieve the sliding and rotating connection between the second main swing arm 24c and the base 10. At this time, the third sliding groove and the third slider 141c are coaxial, and the fourth sliding groove and the fourth slider 141d are coaxial.

[0352] The structure of the connecting part 242c is adapted to the structure of the limiting groove 224c, and the structure of the limiting hole 247c is adapted to the structure of the limiting post 225c. When the third connecting component 20c is in a flattened state, the limiting post 225c can be installed in the limiting hole 247c to improve the assembly accuracy between the second main swing arm 24c and the second fixing bracket 22c. The limiting groove 224c can accommodate part of the connecting part 242c to support the connecting part 242c, ensure the use strength of the second main swing arm 24c, and help to extend the service life of the second main swing arm 24c.

[0353] Please refer to Fig.17 and Fig.18 , Fig.17 is Figure 7 the schematic structural diagram of the pressing plate assembly 40 in the foldable mechanism 130 shown in Fig.18 is Fig.17 the schematic structural diagram of the pressing plate assembly 40 at another angle shown in

[0354] The first pressing plate 41 includes a first support part 411 and a first functional part 412. The first support part 411 is generally in the shape of a long strip plate. The first support part 411 extends along the Y-axis direction. The first functional part 412 is fixedly connected to the first support part 411. Exemplarily, the first support part 411 and the first functional part 412 can be integrally formed to improve the structural strength of the first pressing plate 41 and ensure the structural stability of the first pressing plate 41. In some other embodiments, the first pressing plate 41 can also be an integrated structural member formed by an assembly method. For example, the first functional part 412 can be fixedly connected to the first support part 411 by welding or bonding.

[0355] The first functional part 412 is fixedly connected to the bottom surface of the first support part 411. The first functional part 412 is provided with a first functional groove 414, and the opening of the first functional groove 414 is located on the front end face of the first functional part 412. The first functional groove 414 is recessed from the front end face to the rear end face of the first functional part 412 (the negative Y-axis direction shown in the figure) and penetrates the rear end face of the first functional part 412. That is, the first functional groove 414 penetrates the first functional part 412 along the Y-axis direction.

[0356] Among them, the first functional slot 414 is a strip-shaped hole. The first functional slot 414 has a flattened position (not shown in the figure) and a folded position (not shown in the figure). The folded position is located inside the flattened position (the side shown facing the positive direction of the X-axis in the figure). Among them, the folded position of the first functional slot 414 is located inside the first functional slot 414, and the flattened position of the first functional slot 414 is located outside the first functional slot. Exemplarily, the extending direction of the first functional slot 414 is arc-shaped. In some other embodiments, the extending direction of the first functional slot 414 may also be linear, and the present application does not make specific limitations thereto.

[0357] Please refer to Fig.14 、 Fig.15 and Fig.16 In this embodiment, there are two first functional parts 412, and the two first functional parts 412 are arranged at intervals in the Y-axis direction in sequence. The two first functional parts 412 are respectively a first front functional part 412a and a first rear functional part 412b. The first front functional part 412a is fixedly connected to the front side of the first support part 411, and the first rear functional part 412b is fixedly connected to the rear side of the first support part 411. Among them, the structure of the first functional slot 414 of the first front functional part 412a is adapted to the structure of the first pin shaft 256a of the first sliding part 251a, and the structure of the first functional slot 414 of the first rear functional part 412b is adapted to the structure of the first pin shaft 256b of the first auxiliary swing arm 25b.

[0358] Among them, the front side of the first support part 411 can be received in the receiving notch 211a of the first fixing frame 21a, the rear side of the first support part 411 can be received in the receiving notch 211b of the first fixing frame 21b, and the middle part of the first support part 411 can be received in the receiving notch 211c of the first fixing frame 21c. The first pin shaft 256a of the first sliding part 251a is installed in the first functional slot 414 of the first front functional part 412a, and can slide and rotate relative to the first front functional part 412a in the first functional slot 414, so as to realize the sliding and rotating connection between the first sliding part 251a and the first front functional part 412a, and further realize the sliding and rotating connection between the first auxiliary swing arm 25a and the first pressing plate 41. The first pin shaft 256b of the first sliding part 251b is installed in the first functional slot 414 of the first rear functional part 412b, and can slide and rotate relative to the first rear functional part 412b in the first functional slot 414, so as to realize the sliding and rotating connection between the first sliding part 251b and the first rear functional part 412b, and further realize the sliding and rotating connection between the first auxiliary swing arm 25b and the first pressing plate 41.

[0359] In some other embodiments, the first sliding part (such as the first sliding part 251a and / or the first sliding part 251b) may be provided with a first functional groove. The first functional part (such as the first front functional part 412a and / or the first rear functional part 412b) includes a first pin shaft. The first pin shaft is installed in the first functional groove and can slide and rotate relative to the first sliding part in the first functional groove to achieve the sliding and rotational connection between the first functional part and the first sliding part. Among them, the first functional groove has a folded position and a flattened position, and the folded position of the first functional groove is located outside the flattened position of the first functional groove. At this time, the folded position of the first functional groove is located outside the first functional groove, and the flattened position of the first functional groove is located inside the first functional groove.

[0360] The second pressing plate 42 includes a second supporting part 421 and a second functional part 422. In this embodiment, for the structure of the second pressing plate 42, the cooperation relationship between the second pressing plate 42 and the second fixing frames (such as the second fixing frame 22a, the second fixing frame 22b, and the second fixing frame 22c), and the cooperation relationship between the second pressing plate 42 and the second sub-swing arms (such as the second sub-swing arm 26a and the second sub-swing arm 26b), reference may be made to the relevant description of the first pressing plate 41, which will not be elaborated here. Among them, the second functional groove 424 of the second functional part 422 has a flattened position and a folded position, and the folded position is located inside the flattened position (the side along the negative X-axis direction in the figure).

[0361] In this embodiment, the front side of the second supporting part 421 can be received in the receiving notch 221a of the second fixing frame 22a, the rear side of the second supporting part 421 can be received in the receiving notch 221b of the second fixing frame 22b, and the middle part of the second supporting part 421 can be received in the receiving notch 221c of the second fixing frame 22c. The second pin shaft 266a of the second sliding part 261a can be installed in the second functional groove 424 of the second front functional part 422a and can slide and rotate relative to the second front functional part 422a in the second functional groove 424 of the second front functional part 422a to achieve the sliding and rotational connection between the second sliding part 261a and the second front functional part 422a, thereby realizing the sliding and rotational connection between the second sub-swing arm 26a and the second pressing plate 42. The second pin shaft 266b of the second sliding part 261b can be installed in the second functional groove 424 of the second rear functional part 422b and can slide and rotate relative to the second front functional part 422a in the second functional groove 424 of the second rear functional part 422b to achieve the sliding and rotational connection between the second sliding part 261b and the second rear functional part 422b, thereby realizing the sliding and rotational connection between the second sub-swing arm 26b and the second pressing plate 42.

[0362] In some other embodiments, the second sliding part (such as the second sliding part 261a and / or the second sliding part 261b) may be provided with a second functional groove, and the second functional part (such as the second front functional part 422a and / or the second rear functional part 422b) includes a second pin shaft. The second pin shaft is installed in the second functional groove and can slide and rotate relative to the second sliding part in the second functional groove, so as to realize the sliding and rotational connection between the second functional part and the second sliding part. Among them, the second functional groove has a folding position and a flattened position, and the folding position of the second functional groove is located outside the flattened position of the second functional groove. At this time, the folding position of the second functional groove is located outside the second functional groove, and the flattened position of the second functional groove is located inside the second functional groove.

[0363] It should be noted that the cooperation relationship between the pressing plate assembly 40 and the first connection assembly 20a and the second connection assembly 20b is generally the same. To avoid repetition, next, the cooperation relationship between the pressing plate assembly 40 and the first connection assembly 20a will be taken as an example for description.

[0364] During the folding or unfolding process of the foldable mechanism 130, the first fixing frame 21a rotates relative to the base 10, and the first fixing frame 21a drives the first auxiliary swing arm 25a to slide relative to the first fixing frame 21a, thereby driving the first pin shaft 256a of the first sliding part 251a to slide and rotate relative to the first front functional part 412a in the first functional groove 414 of the first front functional part 412a, so as to realize the relative sliding and rotation between the first auxiliary swing arm 25a and the first pressing plate 41, and further drive the first pressing plate 41 to rotate relative to the base 10.

[0365] Similarly, during the folding or unfolding process of the foldable mechanism 130, the second fixing frame 22a rotates relative to the base 10, and the second fixing frame 22a drives the second auxiliary swing arm 26a to slide relative to the second fixing frame 22a, thereby driving the second pin shaft 266a of the second sliding part 261a to slide and rotate relative to the second front functional part 422a in the second functional groove 424 of the second front functional part 422a, so as to realize the relative sliding and rotation between the second auxiliary swing arm 26a and the second pressing plate 42, and further drive the second pressing plate 42 to rotate relative to the base 10.

[0366] Thus, when the first fixing frame 21a and the second fixing frame 22a rotate relative to the base 10, they can respectively drive the first pressing plate 41 and the second pressing plate 42 to rotate relative to the base 10, thereby driving the relative rotation between the first pressing plate 41 and the second pressing plate 42, and further realizing the mutual switching between the folded state and the flattened state of the pressing plate assembly 40.

[0367] Please refer to Fig.19 、 Fig. 20 and Fig.21 , Fig.19 is Figure 6Schematic cross-sectional structure diagram of the foldable mechanism 130 shown along the section at I-I Fig. 20 is Fig.19 Schematic structure diagram of the foldable mechanism 130 shown when in the unfolded state Fig.21 is Fig.19 Schematic structure diagram of the foldable mechanism 130 shown when in the folded state. Among them, Fig. 20 The state in which the foldable mechanism 130 shown can be Figure 2 The state of the foldable mechanism 130 in the foldable terminal 1000 shown. It should be understood that "sectioned along the I-I" means sectioned along the plane where the I-I line is located, and the relevant descriptions in the following text can be understood in the same way.

[0368] As Fig.19 shown, when the foldable mechanism 130 is in the flattened state, the first connection component 20a and the pressure plate component 40 are both in the flattened state. The first pressure plate 41 and the second pressure plate 42 are located on opposite sides of the base 10 and are relatively flattened, and the top surface of the first pressure plate 41 (i.e., the top surface of the first support portion 411) and the top surface of the second pressure plate 42 (i.e., the top surface of the second support portion 421) are flush. Among them, the first pin shaft 256a of the first sliding portion 251a is located at the flattened position of the first functional groove 414 of the first front functional portion 412a, and the second pin shaft 266a of the second sliding portion 261a is located at the flattened position of the second functional groove 424 of the second pressure plate 42. Among them, the first fixing frame 21a and the second fixing frame 22a are located on opposite sides of the base 10 and are relatively flattened, the first main swing arm 23a and the second main swing arm 24a are relatively flattened, and the first auxiliary swing arm 25a and the second auxiliary swing arm 26a are relatively flattened.

[0369] As Fig. 20 shown, during the folding process of the foldable mechanism 130, for example, during the process of the foldable mechanism 130 switching from the flattened state to the folded state, the first connection component 20a switches from the flattened state to the folded state, the first sliding portion 251a slides and rotates relative to the first front functional portion 412a, and the second sliding portion 261a slides and rotates relative to the second front functional portion 422a to drive the first pressure plate 41 and the second pressure plate 42 to rotate relative to the base 10, so that the pressure plate component 40 switches from the flattened state to the folded state. Among them, the first pin shaft 256a of the first sliding portion 251a slides from the flattened position to the folded position in the first functional groove 414 of the first front functional portion 412a, and the second pin shaft 266a of the second sliding portion 261a slides from the flattened position to the folded position in the second functional groove 424 of the second front functional portion 422a.

[0370] As Fig.21As shown, when the foldable mechanism 130 is in the folded state, the first connection component 20a and the pressing plate component 40 are both in the folded state. The first pin shaft 256a of the first sliding part 251a is located at the folding position of the first functional groove 414 of the first front functional part 412a, and the second pin shaft 266a of the second sliding part 261a is located at the folding position of the second functional groove 424 of the second front functional part 422a. Among them, the first fixing frame 21a and the second fixing frame 22a are folded relative to each other, the first main swing arm 23a and the second main swing arm 24a are folded relative to each other, the first auxiliary swing arm 25a and the second auxiliary swing arm 26a are folded relative to each other, and the first pressing plate 41 and the second pressing plate 42 are folded relative to each other.

[0371] It can be understood that during the unfolding process of the foldable mechanism 130, for example, during the process of the foldable mechanism 130 switching from the folded state to the flattened state, the first connection component 20a switches from the folded state to the flattened state. The first sliding part 251a slides and rotates relative to the first front functional part 412a, and the second sliding part 261a slides and rotates relative to the second front functional part 422a to drive the first pressing plate 41 and the second pressing plate 42 to rotate relative to the base 10, so that the pressing plate component 40 switches from the folded state to the flattened state. Among them, the first pin shaft 256a of the first sliding part 251a slides from the folding position to the flattened position in the first functional groove 414 of the first front functional part 412a, and the second pin shaft 266a of the second sliding part 261a slides from the folding position to the flattened position in the second functional groove 424 of the second front functional part 422a, so that the pressing plate component 40 switches from the folded state to the flattened state.

[0372] In the foldable mechanism 130 shown in this embodiment, the first sliding part of the first auxiliary swing arm (such as the first sliding part 251a of the first auxiliary swing arm 25a and the first sliding part 251b of the first auxiliary swing arm 25b) is matched with the first functional part 412 of the first pressing plate 41 (such as the first front functional part 412a and the first rear functional part 412b), and the second sliding part of the second auxiliary swing arm (such as the second sliding part 261a of the second auxiliary swing arm 26a and the second sliding part 261b of the second auxiliary swing arm 26b) is matched with the second functional part 422 of the second pressing plate 42 (such as the second front functional part 422a and the second rear functional part 422b) to achieve the sliding and rotational connection between the first pressing plate 41 and the second pressing plate 42 and the connection component 20 (such as the first connection component 20a and the second connection component 20b).

[0373] Thus, the first pressing plate 41 and the second pressing plate 42 can achieve relative rotation with the base 10 through the connecting assembly 20 (such as the first connecting assembly 20a and the second connecting assembly 20b). In other words, the first secondary swing arms (such as the first secondary swing arm 25a and the first secondary swing arm 25b) and the second secondary swing arms (such as the second secondary swing arm 26a and the second secondary swing arm 26b) of the connecting assembly 20 can also serve as the pressing plate swing arms at the same time. That is, the foldable mechanism 130 shown in this embodiment omits the pressing plate swing arm, simplifies the overall structure of the foldable mechanism 130, and is beneficial to the lightweight design of the foldable terminal 1000.

[0374] Please refer to Fig.17 and Fig.18 , the first pressing plate 41 further includes a first guiding slider 413. The first guiding slider 413 is fixedly connected to the first supporting portion 411 and is spaced apart from the first functional portion 412. Exemplarily, the first guiding slider 413 is integrally formed with the first supporting portion 411 to improve the structural strength of the first pressing plate 41 and ensure the structural stability of the first pressing plate 41. In some other embodiments, the first guiding slider 413 can also be fixedly connected to the first supporting portion 411 by welding or bonding.

[0375] The first guiding slider 413 is fixedly connected to the bottom surface of the first pressing plate 41. The first guiding slider 413 extends from the bottom surface of the first pressing plate 41 in a direction away from the top surface (the negative Z-axis direction in the figure). The structure of the first guiding slider 413 is adapted to the structure of the first guiding groove (such as the first guiding groove 216a, the first guiding groove 216b or the first guiding groove 213c). Wherein, the bottom surface of the first guiding slider 413 is an arc surface.

[0376] In this embodiment, there are six first guiding sliders 413, and the six first guiding sliders 413 are arranged at intervals in the Y-axis direction. The six first guiding sliders 413 are respectively two first front guiding sliders 413a, two first rear guiding sliders 413b and two first middle guiding sliders 413c. The two first front guiding sliders 413a are fixedly connected to the front side of the first supporting portion 411 and are located on opposite sides of the first front functional portion 412a. The two first rear guiding sliders 413b are fixedly connected to the rear side of the first supporting portion 411 and are located on opposite sides of the first rear functional portion 412b. The two first middle guiding sliders 413c are fixedly connected to the middle of the first pressing plate 41. In some other embodiments, the number of the first guiding sliders 413 can also be less than five or more than seven, and the present application does not specifically limit the number of the first guiding sliders 413.

[0377] Please refer to Fig.14 , Fig.15 and Fig.16, two first front guide sliders 413a can be respectively installed in two first guide grooves 216a, and can slide and rotate in the first guide grooves 216a to achieve a sliding and rotating connection between the first pressing plate 41 and the first fixing frame 21a, so as to improve the assembly stability between the first pressing plate 41 and the first connection assembly 20a. Two first rear guide sliders 413b can be installed in two first guide grooves 216b, and can slide and rotate in the first guide grooves 216b to achieve a sliding and rotating connection between the first pressing plate 41 and the first fixing frame 21b, so as to achieve the assembly stability between the first pressing plate 41 and the second connection assembly 20b. Two first middle guide sliders 413c can be installed in a first guide groove 213c, and can slide and rotate in the first guide groove 213c to achieve a sliding and rotating between the first pressing plate 41 and the first fixing frame 21c, so as to ensure the assembly stability between the first pressing plate 41 and the third connection assembly 20c.

[0378] The second pressing plate 42 further includes a second guide slider 423, and the second guide slider 423 is fixedly connected to the second support portion 421. In this embodiment, the structure of the second guide slider 423, the assembly relationship between the second guide slider 423 and the second support portion 421, and the cooperation relationship between the second guide slider 423 and the second fixing frame (such as the second fixing frame 22a, the second fixing frame 22b, and the second fixing frame 22c) can refer to the relevant description of the first guide slider 413, which will not be elaborated here.

[0379] Two second front guide sliders 423a can be respectively installed in two second guide grooves 226a, and can slide and rotate in the second guide grooves 226a to achieve a sliding and rotating connection between the second pressing plate 42 and the second fixing frame 22a. Two second rear guide sliders 423b can be installed in two second guide grooves 226b, and can slide and rotate in the second guide grooves 226b to achieve a sliding and rotating connection between the second pressing plate 42 and the second fixing frame 22b. Two second middle guide sliders 423c can be installed in a second guide groove 223c, and can slide and rotate in the second guide groove 223c to achieve a sliding and rotating between the second pressing plate 42 and the second fixing frame 22c.

[0380] In some other embodiments, the pressing plate assembly 40 may also include a first pressing plate 41, a second pressing plate 42, and a pressing plate swing arm. The cooperation relationship between the first pressing plate 41 and the connection assembly 20 can refer to the relevant description of the first pressing plate 41 above. The second pressing plate 42 is slidably and rotatably connected to the second fixing frame (such as the second fixing frame 22a, the second fixing frame 22b, and the second fixing frame 22c). The sliding portion of the pressing plate swing arm is slidably connected to the second pressing plate 42, so that the pressing plate swing arm is slidably connected to the second pressing plate 42. The rotating portion of the pressing plate swing arm is rotatably connected to the base 10, so that the pressing plate swing arm is rotatably connected to the base 10.

[0381] Alternatively, the pressing plate assembly 40 may also include a first pressing plate 41, a second pressing plate 42, a first pressing plate swing arm, and a second pressing plate swing arm. The first pressing plate 41 is slidably and rotatably connected to a first fixing frame (such as the first fixing frames 21a, 21b, and 21c), and the second pressing plate 42 is slidably and rotatably connected to a second fixing frame. The sliding portion of the first pressing plate swing arm is slidably connected to the first pressing plate 41, so that the first pressing plate swing arm is slidably connected to the first pressing plate 41. The rotating portion of the first pressing plate swing arm is rotatably connected to the base 10, so that the first pressing plate swing arm is rotatably connected to the base 10. The sliding portion of the second pressing plate swing arm is slidably connected to the second pressing plate 42, so that the second pressing plate swing arm is slidably connected to the second pressing plate 42. The rotating portion of the second pressing plate swing arm is rotatably connected to the base 10, so that the second pressing plate swing arm is rotatably connected to the base 10.

[0382] Please refer to Fig. 22 and Fig.23 , Fig. 22 is Figure 7 a schematic structural view of the floating plate 50 in the foldable mechanism 130 shown in Fig.23 is Fig. 22 a schematic structural view of the floating plate 50 at another angle shown in

[0383] The floating plate 50 includes a main body portion 51, a limiting portion 52, a first connecting portion 53, and a second connecting portion 54. The limiting portion 52, the first connecting portion 53, and the second connecting portion 54 are all fixedly connected to the main body portion 51. Exemplarily, the main body portion 51, the limiting portion 52, the first connecting portion 53, and the second connecting portion 54 may be integrally formed to improve the structural strength of the floating plate 50 and ensure the structural stability of the floating plate 50. In some other embodiments, the floating plate 50 may also be an integrated structural member formed by an assembly method. For example, the limiting portion 52, the first connecting portion 53, and the second connecting portion 54 may be fixedly connected to the main body portion 51 by welding or bonding.

[0384] Please refer to Fig. 9 , Fig.10 and Fig.11 , the main body portion 51 extends in the Y-axis direction. The main body portion 51 is provided with a limiting hole 511, and the opening of the limiting hole 511 is located on the bottom surface of the main body portion 51. The limiting hole 511 is recessed from the bottom surface of the main body portion 51 towards the top surface (the positive Z-axis direction shown in the figure), and penetrates through the top surface of the main body portion 51. That is, the limiting hole 511 penetrates through the main body portion 51 along the thickness direction (the Z-axis direction shown in the figure) of the main body portion 51. Exemplarily, there are two limiting holes 511. One limiting hole 511 is located on the right side of the main body portion 51, and the other limiting hole 511 is located on the left side of the main body portion 51. Among them, the structure of the limiting hole 511 is the same as that of the limiting post 144 (such as Fig.11is adapted to the structure shown). The floating plate 50 is located on the top side of the base 10. Two limit posts 144 can be respectively installed in two limit holes 511 to ensure the assembly accuracy of the floating plate 50 and the base 10.

[0385] The limiting part 52 is fixedly connected to the bottom surface of the main body part 51. The limiting part 52 extends along the negative Z-axis direction from the bottom surface of the main body part 51. Exemplarily, there are two limiting parts 52. One limiting part 52 is fixedly connected to the front side of the main body part 51, and the other limiting part 52 is fixedly connected to the rear side of the main body part 51. Among them, the structure of the limiting part 52 is adapted to the structure of the limiting holes (such as the limiting hole 128 and the limiting hole 138). One limiting part 52 can be installed in the limiting hole 128 and can slide relative to the base 10 in the limiting hole 128, and the other limiting part 52 can be installed in the limiting hole 138 and can slide relative to the base 10 in the limiting hole 138 to realize the sliding connection between the floating plate 50 and the base 10, which can not only limit the movement direction of the floating plate 50 relative to the base 10, but also ensure the assembly accuracy of the floating plate 50 and the base 10.

[0386] Please refer to Fig.14 and Fig.15 , the first connecting part 53 is fixedly connected to the left side of the main body part 51. In this embodiment, there are two first connecting parts 53. Along the Y-axis direction, the two first connecting parts 53 are arranged at intervals. The two first connecting parts 53 are respectively a first front connecting part 53a and a first rear connecting part 53b. The first front connecting part 53a is fixedly connected to the front side of the main body part 51, and the first rear connecting part 53b is fixedly connected to the rear side of the main body part 51.

[0387] Exemplarily, the first front connecting part 53a includes a first pin 531a and a first fixing part 532a. The first fixing part 532a is fixedly connected to the left side of the main body part 51, and the first pin 531a is fixedly connected to the first fixing part 532a to realize the fixed connection between the first pin 531a and the main body part 51. Among them, the axis of the first pin 531a is parallel to the Y-axis direction. The structure of the first pin 531a is adapted to the structure of the first auxiliary groove 257a of the first auxiliary part 254a. The first pin 531a can be installed in the first auxiliary groove 257a and can slide and rotate relative to the first auxiliary part 254a in the first auxiliary groove 257a to realize the sliding and rotating connection between the first front connecting part 53a and the first auxiliary part 254a, and further realize the sliding and rotating connection between the floating plate 50 and the first sub-swing arm 25a.

[0388] Similarly, the first rear connecting portion 53b includes a first pin 531b and a first fixing portion 532b. The structure of the first pin 531b is adapted to the structure of the first auxiliary groove 257b of the first auxiliary portion 254b. The first pin 531b can be installed in the first auxiliary groove 257b and can slide and rotate relative to the first auxiliary portion 254b within the first auxiliary groove 257b, so as to realize the sliding and rotational connection between the first rear connecting portion 53b and the first auxiliary portion 254b, and further realize the sliding and rotational connection between the floating plate 50 and the first auxiliary swing arm 25b.

[0389] In some other embodiments, the first connecting portion (such as the first front connecting portion 53a and / or the first rear connecting portion 53b) may be provided with a first auxiliary groove, and the first auxiliary portion (such as the first auxiliary portion 254a and / or the first auxiliary portion 254b) includes a first pin. The first pin is installed in the first auxiliary groove and can slide and rotate relative to the first connecting portion within the first auxiliary groove, so as to realize the sliding and rotational connection between the first auxiliary portion and the first connecting portion. Among them, the first auxiliary groove has a folded position and a flattened position, and the folded position of the first auxiliary groove is located on the bottom side of the flattened position of the first auxiliary groove. At this time, the folded position of the first auxiliary groove is located on the bottom side of the first auxiliary groove, and the flattened position of the first auxiliary groove is located on the top side of the first auxiliary groove.

[0390] The second connecting portion 54 is fixedly connected to the right side of the main body portion 51. In this embodiment, the structure of the second connecting portion 54 and the cooperation relationship between the second connecting portion 54 and the second auxiliary swing arms (such as the second auxiliary swing arm 26a and the second auxiliary swing arm 26b) may refer to the relevant description of the first connecting portion 53. Exemplarily, the first front connecting portion 53a and the second front connecting portion 54a may be mirror-symmetrical about the main body portion 51, and the first rear connecting portion 53b and the second rear connecting portion 54b may be mirror-symmetrical about the main body portion 51.

[0391] Among them, the second front connecting portion 54a includes a second pin 541a and a second fixing portion 542a. The structure of the second pin 541a is adapted to the structure of the second auxiliary groove 267a of the second auxiliary portion 264a. The second pin 541a can be installed in the second auxiliary groove 267a and can slide and rotate relative to the second auxiliary portion 264a within the second auxiliary groove 267a, so as to realize the sliding and rotation between the second front connecting portion 54a and the second auxiliary portion 264a, and further realize the sliding and rotational connection between the floating plate 50 and the second auxiliary swing arm 26a.

[0392] Among them, the second rear connecting portion 54b includes a second pin post 541b and a second fixing portion 542b. The structure of the second pin post 541b is adapted to the structure of the second auxiliary groove 267b of the second auxiliary portion 264b. The second pin post 541b can be installed in the second auxiliary groove 267b and can slide and rotate relative to the second auxiliary portion 264b within the second auxiliary groove 267b, so as to achieve the sliding and rotation between the second rear connecting portion 54b and the second auxiliary portion 264b, and further achieve the sliding and rotational connection between the floating plate 50 and the second secondary swing arm 26b.

[0393] In some other embodiments, the second connecting portion (such as the second front connecting portion 54a and / or the second rear connecting portion 54b) may be provided with a second auxiliary groove, and the second auxiliary portion (such as the second auxiliary portion 264a and / or the second auxiliary portion 264b) includes a second pin post. The second pin post is installed in the second auxiliary groove and can slide and rotate relative to the second connecting portion within the second auxiliary groove, so as to achieve the sliding and rotational connection between the second auxiliary portion and the second connecting portion. Among them, the second auxiliary groove has a folded position and a flattened position, and the folded position of the second auxiliary groove is located at the bottom side of the flattened position of the second auxiliary groove. At this time, the folded position of the second auxiliary groove is located at the bottom side of the second auxiliary groove, and the flattened position of the second auxiliary groove is located at the top side of the second auxiliary groove.

[0394] It should be noted that the cooperation relationship between the floating plate 50 and the first connection assembly 20a and the second connection assembly 20b is substantially the same. To avoid repetition, hereinafter, the cooperation relationship between the floating plate 50 and the first connection assembly 20a will be taken as an example for description.

[0395] When the first fixing frame 21a and the second fixing frame 22a rotate relative to the base 10, the first fixing frame 21a drives the first secondary swing arm 25a to slide relative to the first fixing frame 21a, and the second fixing frame 22a drives the second secondary swing arm 26a to slide relative to the second fixing frame 22a, thereby driving the first connecting portion 53 of the floating plate 50 to slide and rotate within the first auxiliary groove 257a of the first secondary swing arm 25a, and the second connecting portion 54 to slide and rotate within the second auxiliary groove 267a of the second secondary swing arm 26a, thereby driving the floating plate 50 to float or sink relative to the base 10.

[0396] Please refer to Figure 6 and Fig.19, when the foldable mechanism 130 is in the flattened state, the first connection assembly 20a and the pressing plate assembly 40 are both in the flattened state. The first pin 531a of the first front connection portion 53a is located at the flattened position of the first auxiliary groove 257a of the first auxiliary portion 254a, and the second pin 541a of the second front connection portion 54a is located at the flattened position of the second auxiliary groove 267a of the second auxiliary portion 264a. Among them, the floating plate 50 is located between the first pressing plate 41 and the second pressing plate 42. The top surface of the floating plate 50 (i.e., the top surface of the main body portion 51) is flush with the top surfaces of the first pressing plate 41 and the second pressing plate 42. The top surfaces of the floating plate 50, the first pressing plate 41, and the second pressing plate 42 together form a support surface 1302.

[0397] Please refer to Fig. 20 , during the folding process of the foldable mechanism 130, for example, during the process of the foldable mechanism 130 switching from the flattened state to the folded state, the first connection assembly 20a switches from the flattened state to the folded state. The first auxiliary portion 254a slides and rotates relative to the first front connection portion 53a, and the second auxiliary portion 264a slides and rotates relative to the second front connection portion 54a to drive the floating plate 50 to sink relative to the base 10. Among them, the first pin 531a slides from the flattened position to the folded position in the first auxiliary groove 257a, and the second pin 541a slides from the flattened position to the folded position in the second auxiliary groove 267a.

[0398] Please refer to Fig.21 , when the foldable mechanism 130 is in the folded state, the first connection assembly 20a and the pressing plate assembly 40 are both in the folded state. The first pin 531a of the first front connection portion 53a is located at the folded position of the first auxiliary groove 257a, and the second pin 541a of the second front connection portion 54a is located at the folded position of the second auxiliary groove 267a. Among them, the first fixing frame 21a, the second fixing frame 22a, the first pressing plate 41, the second pressing plate 42, and the floating plate 50 enclose an avoidance space 1303.

[0399] It can be understood that during the unfolding process of the foldable mechanism 130, for example, during the process of the foldable mechanism 130 switching from the folded state to the flattened state, the first connection assembly 20a switches from the folded state to the flattened state. The first auxiliary portion 254a slides and rotates relative to the first front connection portion 53a, and the second auxiliary portion 264a slides and rotates relative to the second front connection portion 54a to drive the floating plate 50 to float relative to the base 10. Among them, the first pin 531a slides from the folded position to the flattened position in the first auxiliary groove 257a, and the second pin 541a slides from the folded position to the flattened position in the second auxiliary groove 267a.

[0400] In the foldable mechanism 130 shown in this embodiment, the first connecting portion 53 of the floating plate 50 is used in cooperation with the first auxiliary portion of the first secondary swing arm (such as the first auxiliary portion 254a of the first secondary swing arm 25a and the first auxiliary portion 254b of the first secondary swing arm 25b), and the second connecting portion 54 is used in cooperation with the second auxiliary portion of the second secondary swing arm (such as the second auxiliary portion 264a of the second secondary swing arm 26a and the second auxiliary portion 264b of the second secondary swing arm 26b) to realize the floating or sinking of the floating plate 50 relative to the base 10.

[0401] In other words, the floating plate 50 can be driven by the first secondary swing arm and the second secondary swing arm to float or sink relative to the base 10. The floating plate 50 does not need to be assembled with the base 10 through structural members such as springs, which simplifies the overall structure of the foldable mechanism 130 and is beneficial to the lightweight design of the foldable terminal 1000. Moreover, the first secondary swing arm on the left side and the second secondary swing arm on the right side can jointly drive the floating plate 50 to float or sink relative to the base 10, ensuring the force balance on both sides during the movement of the floating plate 50 relative to the base 10.

[0402] In addition, when the first secondary swing arm (such as the first secondary swing arm 25a and the first secondary swing arm 25b) rotates relative to the base 10, it can drive the floating plate 50 to float or sink relative to the base 10. At this time, the second connecting portion 54 of the floating plate 50 can slide relative to the second auxiliary portion of the second secondary swing arm (such as the second auxiliary portion 264a of the second secondary swing arm 26a and the second auxiliary portion 264b of the second secondary swing arm 26b), thereby driving the second secondary swing arm (such as the second secondary swing arm 26a and the second secondary swing arm 26b) to rotate relative to the base 10, so as to realize the synchronous rotation between the first secondary swing arm and the second secondary swing arm. Similarly, when the second secondary swing arm rotates relative to the base 10, it can drive the floating plate 50 to float or sink relative to the base, thereby driving the first secondary swing arm to rotate relative to the base 10, so as to realize the synchronous rotation between the first secondary swing arm and the second secondary swing arm.

[0403] Please refer to Fig. 22 and Fig.23 . The floating plate 50 further includes a first support portion 55 and a second support portion 56, and both the first support portion 55 and the second support portion 56 are fixedly connected to the main body portion 51. Exemplarily, the first support portion 55 and the second support portion 56 can be integrally formed with the main body portion 51 to improve the structural strength of the floating plate 50 and ensure the structural stability of the floating plate 50. In some other embodiments, the floating plate 50 can also be an integrated structural member formed by an assembly method. For example, the first support portion 55 and the second support portion 56 can be fixedly connected to the main body portion 51 by welding or bonding.

[0404] In addition, the main body 51 is provided with a first clearance groove 512 and a second clearance groove 513. The openings of the first clearance groove 512 and the second clearance groove 513 are both located on the bottom surface of the main body 51. The first clearance groove 512 and the second clearance groove 513 both recess from the bottom surface of the main body 51 towards the top surface, and penetrate through the bottom surface of the main body 51. That is, the first clearance groove 512 and the second clearance groove 513 both penetrate through the main body 51 along the thickness direction of the main body 51. In addition, the first clearance groove 512 also penetrates through the left side surface of the main body 51, and the second clearance groove 513 also penetrates through the right side surface of the main body 51.

[0405] Exemplarily, there are three first clearance grooves 512, and the three first clearance grooves 512 are arranged at intervals along the Y-axis direction. The three first clearance grooves 512 are respectively a first front clearance groove 512a, a first rear clearance groove 512b, and a first middle clearance groove 512c. The first front clearance groove 512a is located at the front side of the main body 51, and is located on the side of the limiting portion 52 facing the positive Y-axis direction, and is arranged at an interval from the limiting portion 52. The first rear clearance groove 512b is located at the rear side of the main body 51, and is located on the side of the limiting portion 52 facing the positive Y-axis direction, and is arranged at an interval from the limiting portion 52. The first middle clearance groove 512c is located at the middle side of the main body 51. Among them, the structure of the first front clearance groove 512a is adapted to the structure of the sliding portion 233a of the first main swing arm 23a (as Fig.14 shown), the structure of the first rear clearance groove 512b is adapted to the structure of the sliding portion 233b of the first main swing arm 23b (as Fig.15 shown), and the structure of the first middle clearance groove 512c is adapted to the structure of the sliding portion 233c of the first main swing arm 23c (as Fig.16 shown). In some other embodiments, there may also be one, two, or more than four first clearance grooves 512, and the present application does not specifically limit the number of the first clearance grooves 512.

[0406] Exemplarily, there are three second clearance grooves 513, and the three second clearance grooves 513 are arranged at intervals along the Y-axis direction. Among them, the three second clearance grooves 513 are respectively a second front clearance groove 513a, a second rear clearance groove 513b, and a second middle clearance groove 513c. The second front clearance groove 513a is located at the front side of the main body 51, and is located on the side of the limiting portion 52 facing the negative Y-axis direction, and is arranged at an interval from the limiting portion 52. The second rear clearance groove 513b is located at the rear side of the main body 51, and is located on the side of the limiting portion 52 facing the negative Y-axis direction, and is arranged at an interval from the limiting portion 52. The second middle clearance groove 513c is located at the middle side of the main body 51, and is located on the side of the second middle clearance groove 513c facing the negative Y-axis direction, and is arranged at an interval from the second middle clearance groove 513c. Among them, the structure of the second front clearance groove 513a is adapted to the structure of the sliding portion 243a of the second main swing arm 24a (as Fig.14is adapted to the structure of the second main swing arm 24b (as shown in Fig.15 ), the structure of the second middle clearance groove 513c is adapted to the structure of the sliding portion 243c of the second main swing arm 24c (as shown in Fig.16 ). In some other embodiments, the second clearance groove 513 may also have one, two or more than four, and the present application does not specifically limit the number of the second clearance grooves 513.

[0407] The first support portion 55 is fixedly connected to the groove wall of the first clearance groove 512 and extends along the negative X-axis direction from the groove wall of the first clearance groove 512. Exemplarily, there are three first support portions 55, and the three first support portions 55 are respectively fixedly connected to the groove walls of the three first clearance grooves 512. The three first support portions 55 are a first front support portion 55a, a first rear support portion 55b, and a first middle support portion 55c respectively. The first front support portion 55a is fixedly connected to the groove wall of the first front clearance groove 512a, the first rear support portion 55b is fixedly connected to the groove wall of the first rear clearance groove 512b, and the first middle support portion 55c is fixedly connected to the groove wall of the first middle clearance groove 512c.

[0408] Please refer to Fig.14 , Fig.15 and Fig.16 together. The structure of the first front support portion 55a is adapted to the structure of the first support groove 235a of the first main swing arm 23a, the structure of the first rear support portion 55b is adapted to the structure of the first support groove 235b of the first main swing arm 23b, and the structure of the first middle support portion 55c is adapted to the structure of the first support groove 235c of the first main swing arm 23c. When the foldable mechanism 130 is in the flattened state, the first front support portion 55a can be received in the first support groove 235a of the first main swing arm 23a, the first rear support portion 55b can be received in the first support groove 235b of the first main swing arm 23a, and the first middle support portion 55c can be received in the first support groove 235c of the first main swing arm 23c.

[0409] The second support portion 56 is fixedly connected to the groove wall of the second clearance groove 513 and extends along the positive X-axis direction from the groove wall of the second clearance groove 513. In this embodiment, for the structure of the second support portion 56 and the cooperation relationship between the second support portion 56 and the second clearance groove 513, reference may be made to the relevant description of the first support portion 55.

[0410] Among them, the structure of the second front support part 56a is adapted to the structure of the second support groove 245a of the second main swing arm 24a, the structure of the second rear support part 56b is adapted to the structure of the second support groove 245b of the second main swing arm 24b, and the structure of the second middle support part 56c is adapted to the structure of the second support groove 245c of the second main swing arm 24c. When the folding mechanism 130 is in the flattened state, the second front support part 56a can be received in the second support groove 245a of the second main swing arm 24a, the second rear support part 56b can be received in the second support groove 245b of the second main swing arm 24a, and the second middle support part 56c can be received in the second support groove 245c of the second main swing arm 24c.

[0411] Please refer to Fig. 22 、 Fig.23 and Figure 24 to Figure 26 , Fig.24 which Figure 6 is a schematic cross-sectional structure diagram of the folding mechanism 130 shown in the section along II-II, Fig.25 which Fig.24 is a schematic structure diagram of the folding mechanism 130 shown in the unfolded state, Fig.26 which Fig.19 is a schematic structure diagram of the folding mechanism 130 shown in the folded state. Among them, Fig.25 the state in which the folding mechanism 130 shown can be Figure 2 the state in which the folding mechanism 130 is located in the foldable terminal 1000 shown.

[0412] As Fig.24 shown, when the folding mechanism 130 is in the flattened state, the first connection assembly 20a and the pressing plate assembly 40 are both in the flattened state. The sliding part 233a of the first main swing arm 23a is partially received in the first front clearance groove 512a, the first front support part 55a is received in the first support groove 235a of the sliding part 233a, and abuts against the bottom wall of the first support groove 235a. The sliding part 243a of the second main swing arm 24a is partially received in the second front clearance groove 513a, the second front support part 56a is received in the second support groove 245a of the sliding part 243a, and abuts against the bottom wall of the second support groove 245a.

[0413] In other words, the bottom wall of the first support groove 235a abuts against the bottom surface of the first front support portion 55a, and the bottom wall of the second support groove 245a abuts against the bottom surface of the second front support portion 56a, so that the sliding portions 233a of the first main swing arm 23a and the sliding portions 243a of the second main swing arm 24a jointly abut against the bottom surface of the floating plate 50. At this time, the first main swing arm 23a can support the floating plate 50 through the sliding portion 233a, and the second main swing arm 24a can support the floating plate 50 through the sliding portion 243a, which can not only increase the assembly stability of the floating plate 50 relative to the base 10 and the first connection assembly 20a, but also keep the floating plate 50 in a floating state relative to the base 10 to increase the overall structural stability of the foldable mechanism 130.

[0414] In addition, the first pressing plate 41 and the first main swing arm 23a can also reuse the dimension of the foldable mechanism 130 in the thickness direction (the Z-axis direction in the figure), and the second pressing plate 42 and the second main swing arm 24a can reuse the dimension of the foldable mechanism 130 in the thickness direction, which can reduce the dimension of the foldable mechanism 130 in the thickness direction, is beneficial to realizing the thin and light design of the foldable mechanism 130, and further helps to realize the thin and light design of the foldable terminal 1000.

[0415] As Fig.25 and Fig.26 shown, when the foldable mechanism 130 is in the unfolded state, the first connection assembly 20a is in the unfolded state, the first front support portion 55a is not located in the first support groove 235a of the first main swing arm 23a, and the second front support portion 56a is not located in the second support groove 245a of the second main swing arm 24a. At this time, neither the first main swing arm 23a nor the second main swing arm 24a will affect the downward floating of the floating plate 50 relative to the base 10, that is, neither the first main swing arm 23a nor the second main swing arm 24a will interfere with the movement of the floating plate 50, ensuring the smooth use of the foldable mechanism 130.

[0416] It should be noted that the cooperation relationship between the floating plate 50 and the first damping assembly 30a and the second damping assembly 30b is generally the same. To avoid repetition, next, the cooperation relationship between the floating plate 50 and the first damping assembly 30a will be taken as an example for description.

[0417] Please refer to Fig. 22 、 Fig.23 and Figure 27 to Figure 29 , Fig. 27 which Figure 6 is a schematic cross-sectional structure diagram of the foldable mechanism 130 cut along III-III, Fig.28 which Fig. 27 is a schematic structural diagram of the foldable mechanism 130 when it is in the unfolded state, Fig.29 which Fig. 27 is a schematic structural diagram of the foldable mechanism 130 when it is in the folded state. Among them, Fig.28 The state of the foldable mechanism 130 shown can be Figure 2 the state of the foldable mechanism 130 in the foldable terminal 1000 shown.

[0418] As Fig. 27 shown, when the foldable mechanism 130 is in the flattened state, the first damping assembly 30a is in the flattened state, and the supporting portions 324a of the first damping swing arm 32a and the supporting portions 334a of the second damping swing arm 33a respectively abut against the bottom surface of the main body portion 51 of the floating plate 50. At this time, the first damping swing arm 32a and the second damping swing arm 33a can support the floating plate 50 to keep the floating plate 50 in a floating state relative to the base 10, so as to increase the overall structural stability of the foldable mechanism 130.

[0419] As Fig.28 and Fig.29 shown, when the foldable mechanism 130 is in the unfolded state, the first damping assembly 30a is in the unfolded state, and the supporting portions 324a of the first damping swing arm 32a and the supporting portions 334a of the second damping swing arm 33a do not abut against the bottom surface of the main body portion 51 of the floating plate 50. At this time, neither the first damping swing arm 32a nor the second damping swing arm 33a will affect the downward floating of the floating plate 50 relative to the base 10, that is, neither the first damping swing arm 32a nor the second damping swing arm 33a will interfere with the movement of the floating plate 50, ensuring the smooth use of the foldable mechanism 130.

[0420] Please refer to Figure 4 、 Figure 7 、 Fig.30 and Fig.31 , Fig.30 is Figure 3 the schematic cross-sectional structure diagram of the foldable terminal 1000 shown, Fig.31 is Figure 1 the schematic cross-sectional structure diagram of the foldable terminal 1000 shown. Among them, Fig.30 and Fig.31 the foldable terminal 1000 shown only shows the foldable parts 230 of the foldable mechanism 130 and the display screen 200.

[0421] Specifically, the first fixing frames 21a, 21b and 21c are fixedly connected to the first housing 110, and the second fixing frames 22a, 22b and 22c are fixedly connected to the second housing 120. Exemplarily, the first fixing frames 21a, 21b and 21c can be fixedly connected to the first housing 110 through fasteners such as screws or bolts, and the second fixing frames 22a, 22b and 22c can be fixedly connected to the second housing 120 through fasteners such as screws or bolts.

[0422] As Fig.30 As shown, the support surface 1302 formed by the first pressing plate 41, the second pressing plate 42 and the floating plate 560 can support the foldable portion 230 of the display screen 200 to ensure good display 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 floating plate 50 can jointly support the display screen 200 with the first housing 110 and the second housing 120, realizing effective support for the display screen 200 by the foldable device 100 in the flattened state.

[0423] As Fig.31 shown, when the foldable terminal 1000 is in the folded state, the foldable portion 230 of the display screen 200 is located inside the foldable mechanism 130. Specifically, the foldable portion 230 is located in the avoidance space 1303. At this time, the foldable mechanism 130 can avoid the R angle formed when the foldable portion 230 is bent, so that the foldable portion 230 will not be bent at a large angle, avoiding defects such as creases on the display screen 200, which helps to extend the service life of the display screen 200.

[0424] In the foldable mechanism 130 adopted by the foldable terminal 1000 shown in this embodiment, the first secondary swing arms and the second secondary swing arms of the connection assembly 20 (such as the first connection assembly 20a and the second connection assembly 20b) can act as pressing plate swing arms, that is, drive the first pressing plate 41 and the second pressing plate 42 to rotate relative to the base 10 respectively. That is, the foldable mechanism 130 shown in this embodiment can omit the pressing plate swing arm, simplify the overall structure of the foldable mechanism 130, and is beneficial to realizing the lightweight design of the foldable terminal 1000.

[0425] In addition, the first secondary swing arms and the second secondary swing arms of the connection assembly 20 (such as the first connection assembly 20a and the second connection assembly 20b) can also drive the floating plate 50 to float or sink relative to the base 10, and can omit structural parts such as springs required for the assembly between the floating plate 50 and the base 10, further simplifying the overall structure of the foldable mechanism 130, and being beneficial to realizing the lightweight design of the foldable terminal 1000.

[0426] The above description is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should be covered within the protection scope of the present application; without 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 in that, It includes a base, a first fixing frame, a second fixing frame, a first auxiliary swing arm, a second auxiliary swing arm and a floating plate; The first auxiliary swing arm comprises a first sliding portion, a first transition portion, a first rotating portion and a first auxiliary portion, wherein the first transition portion is fixedly connected between the first rotating portion and the first sliding portion, the first auxiliary portion is fixedly connected to an end of the first rotating portion away from the first transition portion, the first auxiliary portion is provided with a first auxiliary groove, the first auxiliary groove has a folding position and a flattening position, the folding position of the first auxiliary groove is located at the top side of the flattening position of the first auxiliary groove, the first sliding portion is slidably connected to the first fixing frame, and the first rotating portion is rotatably connected to the base; The second auxiliary swing arm comprises a second sliding portion, a second transition portion and a second rotating portion, the second transition portion is fixedly connected between the second rotating portion and the second sliding portion, the second sliding portion is slidably connected to the second fixing frame, and the second rotating portion is rotatably connected to the base; The floating plate is located on the top side of the base, and the floating plate includes a first connecting portion, the first connecting portion is slidably and rotatably connected to the first auxiliary portion, the first connecting portion includes a first pin, the first pin is installed in the first auxiliary groove, and can slide and rotate relative to the first auxiliary portion in the first auxiliary groove; When the foldable mechanism is in a folded state, the first pin is located at a folded position of the first auxiliary slot; When the foldable mechanism is in a flattened state, the first fixing frame and the second fixing frame are located at opposite sides of the base, and the first pin is located at a flattened position of the first auxiliary groove; During the unfolding process of the foldable mechanism, the first auxiliary portion slides and rotates relative to the first connecting portion to drive the floating plate to float relative to the base; During the folding process of the foldable mechanism, the first auxiliary portion slides and rotates relative to the first connecting portion to drive the floating plate to sink relative to the base.

2. The foldable mechanism according to claim 1, wherein, The second auxiliary swing arm further includes a second auxiliary portion, the second rotating portion is fixedly connected between the second sliding portion and the second auxiliary portion, and the floating plate further includes a second connecting portion, the second connecting portion is slidably and rotationally connected to the second auxiliary portion; During the unfolding process of the foldable mechanism, the second auxiliary portion slides and rotates relative to the second connecting portion to drive the floating plate to float relative to the base; During the folding process of the foldable mechanism, the second auxiliary portion slides and rotates relative to the second connecting portion to drive the floating plate to sink relative to the base.

3. The foldable mechanism according to claim 2, wherein The second auxiliary portion is provided with a second auxiliary groove, the second auxiliary groove has a folded position and a flattened position, the folded position of the second auxiliary groove is located on the top side of the flattened position of the second auxiliary groove; The second connecting portion includes a second pin, which is installed in the second auxiliary groove and can slide and rotate relative to the second auxiliary portion in the second auxiliary groove; When the foldable mechanism is in a folded state, the first pin is located at a folded position of the first auxiliary slot; When the foldable mechanism is in the flattened state, the first pin column is located at the flattened position of the first auxiliary groove.

4. The foldable mechanism according to claim 2 or 3, characterized in that, The foldable mechanism further includes a first pressing plate and a second pressing plate. The first pressing plate is slidably and rotatably connected to the first fixing frame, and the second pressing plate is slidably and rotatably connected to the second fixing frame. The first pressing plate includes a first functional portion which is slidably and rotatably connected to the first sliding portion, and the second pressing plate includes a second functional portion which is slidably and rotatably connected to the second sliding portion. During the unfolding process of the foldable mechanism, the first sliding portion slides and rotates relative to the first functional portion, and the second sliding portion slides and rotates relative to the second functional portion, so as to drive the first pressing plate and the second pressing plate to unfold relative to each other. During the folding process of the foldable mechanism, the first sliding portion slides and rotates relative to the first functional portion, and the second sliding portion slides and rotates relative to the second functional portion, so as to drive the first pressing plate and the second pressing plate to fold relative to each other.

5. The foldable mechanism according to claim 4, wherein, When the foldable mechanism is in the flattened state, the first pressing plate and the second pressing plate are located on opposite sides of the base, and the top surfaces of the first pressing plate, the second pressing plate and the floating plate are flush with each other, and the top surfaces of the first pressing plate, the second pressing plate and the floating plate form a supporting surface.

6. The foldable mechanism according to claim 4, characterized in that, The foldable mechanism further includes a first main swing arm and a second main swing arm. The rotating portion of the first main swing arm is rotatably connected to the first fixing frame, and the sliding portion of the first main swing arm is slidably and rotatably connected to the base. The rotating portion of the second main swing arm is rotatably connected to the second fixing frame, and the sliding portion of the second main swing arm is slidably and rotatably connected to the base.

7. The foldable mechanism according to claim 6, wherein When the foldable mechanism is in the flattened state, the sliding portions of the first main swing arm and the second main swing arm both abut against the bottom surface of the floating plate.

8. The foldable mechanism according to claim 7, characterized in that, The sliding portion of the first main swing arm is provided with a first support groove, and the sliding portion of the second main swing arm is provided with a second support groove. The floating plate includes a first support portion and a second support portion. When the foldable mechanism is in the flattened state, the groove wall of the first support groove abuts against the bottom surface of the first support portion, and the groove wall of the second support groove abuts against the bottom surface of the second support portion.

9. The foldable mechanism according to claim 4, wherein, When the foldable mechanism is in the folded state, the first fixing frame and the second fixing frame are folded relative to each other, the first pressing plate and the second pressing plate are folded relative to each other, and the first fixing frame, the second fixing frame, the first pressing plate, the second pressing plate and the floating plate enclose an avoidance space, and the cross section of the avoidance space is in the shape of a water droplet.

10. The foldable mechanism according to any one of claims 5, 6, and 8, characterized in that, When the foldable mechanism is in the folded state, the first fixing frame and the second fixing frame are folded relative to each other, the first pressing plate and the second pressing plate are folded relative to each other, and the first fixing frame, the second fixing frame, the first pressing plate, the second pressing plate and the floating plate enclose an avoidance space, and the cross section of the avoidance space is in the shape of a water droplet.

11. The foldable mechanism according to claim 7, characterized in that, When the foldable mechanism is in the folded state, the first fixing bracket and the second fixing bracket are folded relative to each other, the first pressing plate and the second pressing plate are folded relative to each other, and the first fixing bracket, the second fixing bracket, the first pressing plate, the second pressing plate and the floating plate enclose an avoidance space, and the cross section of the avoidance space is in the shape of a water droplet.

12. The collapsible mechanism according to any one of claims 5, 6, 8, 9 and 11, characterized in that, The foldable mechanism further includes a damping member, a first damping swing arm and a second damping swing arm. The damping member is fixedly connected to the base. The rotating portion of the first damping swing arm is rotatably connected to the damping member, and the sliding portion of the first damping swing arm is slidably and rotatably connected to the first fixing bracket. The rotating portion of the second damping swing arm is rotatably connected to the damping member, and the sliding portion of the second damping swing arm is slidably and rotatably connected to the second fixing bracket.

13. The foldable mechanism according to claim 7, characterized in that, The foldable mechanism further includes a damping member, a first damping swing arm and a second damping swing arm. The damping member is fixedly connected to the base. The rotating portion of the first damping swing arm is rotatably connected to the damping member, and the sliding portion of the first damping swing arm is slidably and rotatably connected to the first fixing bracket. The rotating portion of the second damping swing arm is rotatably connected to the damping member, and the sliding portion of the second damping swing arm is slidably and rotatably connected to the second fixing bracket.

14. The foldable mechanism according to claim 10, wherein The foldable mechanism further includes a damping member, a first damping swing arm and a second damping swing arm. The damping member is fixedly connected to the base. The rotating portion of the first damping swing arm is rotatably connected to the damping member, and the sliding portion of the first damping swing arm is slidably and rotatably connected to the first fixing bracket. The rotating portion of the second damping swing arm is rotatably connected to the damping member, and the sliding portion of the second damping swing arm is slidably and rotatably connected to the second fixing bracket.

15. The foldable mechanism according to claim 12, characterized in that, The supporting portion of the first damping swing arm is fixedly connected to the side of the rotating portion of the first damping swing arm away from the sliding portion of the first damping swing arm. The supporting portion of the second damping swing arm is fixedly connected to the side of the rotating portion of the second damping swing arm away from the sliding portion of the second damping swing arm. When the foldable mechanism is in the flattened state, the supporting portions of the first damping swing arm and the second damping swing arm both abut against the bottom surface of the floating plate.

16. The foldable mechanism according to claim 13 or 14, characterized in that, The supporting portion of the first damping swing arm is fixedly connected to the side of the rotating portion of the first damping swing arm away from the sliding portion of the first damping swing arm. The supporting portion of the second damping swing arm is fixedly connected to the side of the rotating portion of the second damping swing arm away from the sliding portion of the second damping swing arm. When the foldable mechanism is in the flattened state, the supporting portions of the first damping swing arm and the second damping swing arm both abut against the bottom surface of the floating plate.

17. The foldable mechanism according to claim 12, wherein, The rotation center of the first rotating portion relative to the base is the first center, the rotation center of the first damping swing arm relative to the base is the second center, and the first center and the second center are spaced apart from each other.

18. The collapsible mechanism according to any one of claims 13 to 15, characterized in that, The rotation center of the first rotating portion relative to the base is the first center, the rotation center of the first damping swing arm relative to the base is the second center, and the first center and the second center are spaced apart from each other.

19. The collapsible mechanism according to claim 16, wherein The rotation center of the first rotating part relative to the base is the first center, the rotation center of the first damping swing arm relative to the base is the second center, and the first center and the second center are spaced apart from each other.

20. The foldable mechanism according to any one of claims 1 to 3, 5, 6, 8, 9, 11, 13 to 15, 17, and 19, characterized in that, The base is provided with a limiting hole, and the floating plate further includes a limiting part. The limiting part is installed in the limiting hole and can slide relative to the base within the limiting hole.

21. The foldable mechanism according to claim 4, wherein The base is provided with a limiting hole, and the floating plate further includes a limiting part. The limiting part is installed in the limiting hole and can slide relative to the base within the limiting hole.

22. The foldable mechanism according to claim 7, characterized in that, The base is provided with a limiting hole, and the floating plate further includes a limiting part. The limiting part is installed in the limiting hole and can slide relative to the base within the limiting hole.

23. The foldable mechanism according to claim 10, wherein, The base is provided with a limiting hole, and the floating plate further includes a limiting part. The limiting part is installed in the limiting hole and can slide relative to the base within the limiting hole.

24. The foldable mechanism according to claim 12, wherein, The base is provided with a limiting hole, and the floating plate further includes a limiting part. The limiting part is installed in the limiting hole and can slide relative to the base within the limiting hole.

25. The foldable mechanism according to claim 16, wherein, The base is provided with a limiting hole, and the floating plate further includes a limiting part. The limiting part is installed in the limiting hole and can slide relative to the base within the limiting hole.

26. The foldable mechanism according to claim 18, wherein, The base is provided with a limiting hole, and the floating plate further includes a limiting part. The limiting part is installed in the limiting hole and can slide relative to the base within the limiting hole.

27. A foldable mechanism, characterized in that, It includes a base, a first fixing frame, a second fixing frame, a first auxiliary swing arm, a second auxiliary swing arm, and a first pressing plate; The first auxiliary swing arm includes a first sliding part, a first transition part, and a first rotating part. The first transition part is fixedly connected between the first rotating part and the first sliding part. The first sliding part is slidably connected to the first fixing frame. The first sliding part includes a first pin shaft, and the first rotating part is rotatably connected to the base; The second auxiliary swing arm includes a second sliding part, a second transition part, and a second rotating part. The second transition part is fixedly connected between the second rotating part and the second sliding part. The second sliding part is slidably connected to the second fixing frame, and the second rotating part is rotatably connected to the base; The first pressing plate is slidably and rotatably connected to the first fixing frame. The first pressing plate includes a first functional part. The first functional part is slidably and rotatably connected to the first sliding part. The first functional part is provided with a first functional groove. The first functional groove has a folding position and a flattening position. The folding position of the first functional groove is inside the flattening position of the first functional groove. The first pin shaft is installed in the first functional groove and can slide and rotate relative to the first functional part within the first functional groove; When the foldable mechanism is in the folded state, the first pin shaft is located at the folding position of the first functional groove; When the foldable mechanism is in the flattened state, the first pin shaft is located at the flattening position of the first functional groove; During the unfolding or folding process of the foldable mechanism, the first sliding part slides and rotates relative to the first functional part to drive the first pressing plate to rotate relative to the base.

28. The foldable mechanism according to claim 27, wherein, The first functional groove is an arc-shaped groove.

29. The foldable mechanism according to claim 27 or 28, characterized in that, The foldable mechanism further includes a second pressing plate, the second pressing plate is slidably and rotatably connected to the second fixing frame, the second pressing plate includes a second functional part, and the second functional part is slidably and rotatably connected to the second sliding part; During the folding or unfolding process of the foldable mechanism, the second sliding part slides and rotates relative to the second functional part to drive the second pressing plate to rotate relative to the base.

30. The foldable mechanism according to claim 29, wherein, The second functional part is provided with a second functional groove, the second functional groove has a folding position and a flattening position, and the folding position of the second functional groove is located inside the flattening position of the second functional groove; The second sliding part includes a second pin shaft, the second pin shaft is installed in the second functional groove and can slide and rotate relative to the second functional part in the second functional groove; When the foldable mechanism is in a folded state, the second pin shaft is located at the folding position of the second functional groove; When the foldable mechanism is in a flattened state, the second pin shaft is located at the flattening position of the second functional groove.

31. The foldable mechanism according to claim 29, wherein The foldable mechanism further includes a floating plate, and the floating plate is located on the top side of the base; When the foldable mechanism is in a flattened state, the first pressing plate and the second pressing plate are located on opposite sides of the base, the top surfaces of the floating plate, the first pressing plate and the second pressing plate are flush, and the top surfaces of the first pressing plate, the second pressing plate and the floating plate form a supporting surface.

32. The foldable mechanism according to claim 30, wherein The foldable mechanism further includes a floating plate, and the floating plate is located on the top side of the base; When the foldable mechanism is in a flattened state, the first pressing plate and the second pressing plate are located on opposite sides of the base, the top surfaces of the floating plate, the first pressing plate and the second pressing plate are flush, and the top surfaces of the first pressing plate, the second pressing plate and the floating plate form a supporting surface.

33. A foldable terminal, characterized in that, Comprising a first housing, a second housing and the foldable mechanism according to any one of claims 1 to 32, the foldable mechanism connects the first housing and the second housing, and the first fixing frame is fixedly connected to the first housing.

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