CN117119086A

CN117119086A - Foldable mechanism and foldable terminal

Info

Publication number: CN117119086A
Application number: CN202310090853.8A
Authority: CN
Inventors: 刘晓东; 陈瑞豪; 董绍洪; 田畅
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2023-01-18
Filing date: 2023-01-18
Publication date: 2023-11-24

Abstract

The application provides a foldable mechanism and a foldable terminal. The foldable mechanism can improve the movement track of the display screen and improve the use reliability of the foldable terminal. The foldable mechanism comprises a base, a first fixing frame and a first main swing arm. The first fixing frame is located one side of the base, and the first main swing arm is connected between the base and the first fixing frame. The folding mechanism is switched between a folding state and an unfolding state and comprises a virtual axis rotation stage and a real axis rotation stage. In the virtual axis rotation stage, the sliding part of the first main swing arm slides and rotates relative to the base, and the rotating center of the sliding part of the first main swing arm relative to the base is a first center. In the real-shaft rotation stage, the sliding part of the first main swing arm rotates relative to the base, the sliding part of the first main swing arm is a second center relative to the rotation center of the base, and the second center and the first center are arranged at intervals.

Description

Foldable mechanism and foldable terminal

Technical Field

The present application relates to the technical field of foldable terminals, and in particular, to a foldable mechanism and a foldable terminal.

Background

With the progress of science and technology, the large-screen intelligent terminal comes, and the foldable terminal is favored by users because of the advantages of large screen, convenience in carrying and the like. Currently, foldable terminals often employ a foldable mechanism to effect folding and unfolding. However, in the process that the existing folding mechanism drives the display screen to rotate, the movement track of the display screen is single, crease is easily generated on the display screen, and the use reliability of the folding terminal is affected.

Disclosure of Invention

The application provides a foldable mechanism and a foldable terminal, which are used for improving the movement track of a display screen and improving the use reliability of the foldable terminal.

In a first aspect, the present application provides a foldable mechanism comprising a base and a connection assembly mounted to the base. The connecting assembly comprises a first fixing frame and a first main swing arm, the first fixing frame is located on one side of the base, and the first main swing arm is connected between the base and the first fixing frame.

The folding mechanism is switched between a folding state and an unfolding state and comprises a virtual axis rotation stage and a real axis rotation stage.

In the virtual axis rotation stage, the sliding part of the first main swing arm rotates in a virtual axis manner relative to the base, the sliding part of the first main swing arm slides and rotates relative to the base, and the rotating center of the sliding part of the first main swing arm relative to the base is a first center. That is, the first main swing arm slides and rotates relative to the base, and the rotation center of the first main swing arm relative to the base is a first center.

In the real-shaft rotation stage, the sliding part of the first main swing arm rotates in real-shaft mode relative to the base, the sliding part of the first main swing arm rotates relative to the base, and the rotating center of the sliding part of the first main swing arm relative to the base is a second center. That is, the first main swing arm rotates relative to the base, and the rotation center of the first main swing arm relative to the base is a second center. The second center is spaced from the first center.

In the process of switching between the folding state and the unfolding state of the foldable mechanism, when the first main swing arm rotates relative to the base, two conditions of real-axis rotation and virtual-axis rotation exist, and the rotation center of the first main swing arm relative to the base is different in the two conditions. In other words, the motion track of the first main swing arm in the state switching process is changed, and correspondingly, the motion track of the first fixing frame in the state switching process is changed, so that the rotation centers of the real shaft rotation stage and the virtual shaft rotation stage can be designed in a targeted manner, and the design freedom of the foldable mechanism in the state switching process is improved.

When the foldable mechanism is used for the foldable terminal, the foldable mechanism is favorable for changing the movement track of the display screen in the folding and unfolding processes, improving the design freedom degree of the movement track of the display screen, being favorable for improving the stress state of the display screen in the movement process, solving the problems of crease and inverted arch generated by the display screen, prolonging the service life of the display screen and ensuring the use reliability of the foldable terminal.

In one embodiment, the sliding portion of the first main swing arm is located between the left side surface of the base and the right side surface of the base when the foldable mechanism is in the folded state. In other words, the sliding part of the first main swing arm does not protrude relative to the side surface of the base, and the sliding part of the first main swing arm completely reuses the thickness space of the base, so that the thickness of the foldable mechanism in the folded state is reduced, and the light and thin design of the foldable terminal is facilitated.

In one embodiment, the virtual axis rotation stage is performed first and then the real axis rotation stage is performed in the process of switching the foldable mechanism from the unfolded state to the folded state.

In the process of switching the foldable mechanism from the folded state to the unfolded state, the foldable mechanism firstly carries out a real-axis rotation stage and then carries out a virtual-axis rotation stage.

In one embodiment, the rotating portion of the first main swing arm is rotatably connected to the first fixing frame. That is, the first main swing arm is rotatably connected with the first fixing frame. When the first fixing frame rotates relative to the base, the first fixing frame drives the first main swing arm to rotate relative to the first fixing frame and also rotate relative to the base.

The connecting part of the first main swing arm is fixedly connected between the sliding part of the first main swing arm and the rotating part of the first main swing arm.

In one embodiment, the connecting portion of the first main swing arm is fixedly connected with the first fixing frame. That is, the first main swing arm is fixedly connected with the first fixing frame. When the first fixing frame rotates relative to the base, the first fixing frame drives the first main swing arm to rotate relative to the base.

The connecting part of the first main swing arm is fixedly connected between the first fixing frame and the sliding part of the first main swing arm.

The first main swing arm is fixedly connected with the first fixing frame, so that the assembly stability between the first main swing arm and the first fixing frame can be improved, the structure of the connecting assembly can be simplified, and the structural complexity of the foldable mechanism is reduced.

The first main swing arm and the first fixing frame can be integrally formed, so that the manufacturing cost of the connecting assembly is reduced.

In one embodiment, the base is provided with a first mating groove having a flattened position and a switch position, the flattened position being located inside the switch position. The first matching groove can be an arc-shaped groove, and the groove bottom wall surface and the groove top wall surface of the first matching groove are arc-shaped surfaces.

The sliding part of the first main swing arm is arranged in the first matching groove and can rotate relative to the base in the first matching groove. The sliding part of the first main swing arm can be arc-shaped plate.

In the virtual axis rotation stage, the sliding part of the first main swing arm slides and rotates relative to the base in the first matching groove and slides between the flattening position and the switching position.

In the real-shaft rotation stage, the sliding part of the first main swing arm is positioned at the switching position and rotates relative to the base.

In one embodiment, the base is provided with a first avoidance groove, and an opening of the first avoidance groove is positioned on the bottom wall surface of the first matching groove. The first avoiding groove is recessed from the groove bottom wall surface of the first matching groove in a direction away from the first matching groove.

When the foldable mechanism is in a folded state, the first avoiding groove is away from the sliding part of the first main swing arm. The first avoiding groove is formed in a part, away from the connecting part, of the sliding part of the first main swing arm.

When the first main swing arm rotates relative to the base, the first avoidance groove can avoid interference between the first main swing arm and the base, ensure the smoothness of the rotation of the first main swing arm relative to the base, be favorable for improving the movement smoothness of the foldable mechanism, and further improve the comfort level of a user using the foldable terminal.

In one embodiment, the folding mechanism performs a real axis rotation phase and then performs a virtual axis rotation phase in the process of switching from the unfolded state to the folded state.

In the process of switching the foldable mechanism from the folded state to the unfolded state, the virtual axis rotation stage is performed first, and then the real axis rotation stage is performed.

The connecting assembly of the foldable mechanism further comprises a first auxiliary swing arm, the sliding part of the first auxiliary swing arm slides and is rotationally connected with the first fixing frame, the rotating part of the first auxiliary swing arm is rotationally connected with the base, and the rotating center of the rotating part of the first auxiliary swing arm is overlapped with the second center relative to the base. That is, the rotation center of the first auxiliary swing arm relative to the base coincides with the second center.

The connecting part of the first auxiliary swing arm is fixedly connected between the sliding part of the first auxiliary swing arm and the rotating part of the first auxiliary swing arm.

In the virtual axis rotation stage, the rotation part of the first auxiliary swing arm rotates relative to the base, and the sliding part of the first auxiliary swing arm slides and rotates relative to the first fixing frame.

In the real-shaft rotation stage, the rotation part of the first auxiliary swing arm rotates relative to the base, and the sliding part of the first auxiliary swing arm and the first fixing frame are relatively static.

In one embodiment, the sliding portion of the first auxiliary swing arm is provided with a sliding groove, the sliding groove is provided with a first position and a second position, and the first position is located on the inner side of the second position. Wherein, the spout can be the arc spout, and the groove top wall face and the groove diapire face of spout are the arcwall face.

The first fixing frame is provided with a sliding part, and the sliding part of the first fixing frame is arranged in the sliding groove and can slide in the sliding groove relative to the sliding part of the first auxiliary swing arm.

In the virtual axis rotation stage, the sliding part of the first fixing frame slides in the sliding groove relative to the sliding part of the first auxiliary swing arm and slides between the first position and the second position.

In the solid shaft rotation stage, the sliding part of the first fixing frame is static relative to the sliding part of the first auxiliary swing arm in the sliding groove and is positioned at the first position.

In one embodiment, the base is provided with a first mating groove having a rotational position and a folded position, the rotational position being located inside the folded position. Wherein, the first mating groove can include an arc-shaped groove portion, and a groove bottom wall surface and a groove top wall surface of the arc-shaped groove portion in the first mating groove are arc-shaped surfaces.

The sliding part of the first main swing arm is arranged at the arc-shaped groove part of the first matching groove and can rotate relative to the base in the arc-shaped groove part of the first matching groove. The sliding part of the first main swing arm can be in a circular shaft shape.

In the virtual axis rotation stage, the sliding part of the first main swing arm slides and rotates relative to the base in the arc-shaped groove part of the first matching groove and slides between a rotation position and a folding position;

In the real-shaft rotation stage, the sliding part of the first main swing arm is positioned at the rotation position and rotates relative to the base.

In one embodiment, the connecting assembly of the foldable mechanism further comprises a second fixing frame and a second main swing arm, the second fixing frame is located on one side of the base, and the second main swing arm is connected between the base and the second fixing frame.

In the process that the foldable mechanism is switched between the folded state and the unfolded state, the rotation direction of the first fixing frame and the first main swing arm relative to the base is a first direction, the rotation direction of the second fixing frame and the second main swing arm relative to the base is a second direction, and the second direction is opposite to the first direction.

When the foldable mechanism is switched from the folded state to the unfolded state, the connecting assembly is switched from the folded state to the unfolded state, the first fixing frame and the first main swing arm rotate in the anticlockwise direction relative to the base, and the second fixing frame and the second main swing arm rotate in the clockwise direction relative to the base. When the foldable mechanism is switched from the unfolding state to the folding state, the connecting assembly is switched from the unfolding state to the folding state, the first fixing frame and the first main swing arm rotate clockwise relative to the base, and the second fixing frame and the second main swing arm rotate anticlockwise relative to the base.

In one embodiment, in the virtual axis rotation stage, the sliding portion of the second main swing arm performs virtual axis rotation relative to the base, the sliding portion of the second main swing arm slides and rotates relative to the base, and the rotation center of the sliding portion of the second main swing arm relative to the base is a third center. That is, the second main swing arm slides relative to the base and rotates the seat, and the rotation center of the second main swing arm relative to the base is a third center.

In the real-shaft rotation stage, the sliding part of the second main swing arm rotates in real-shaft mode relative to the base, the sliding part of the second main swing arm rotates relative to the base, and the rotation center of the sliding part of the second main swing arm relative to the base is a fourth center. That is, the second main swing arm rotates relative to the base, and the rotation center of the second main swing arm relative to the base is a fourth center. Wherein the fourth center is spaced from the third center.

In the process of switching between the folding state and the unfolding state of the foldable mechanism, when the second main swing arm rotates relative to the base, two conditions of real-axis rotation and virtual-axis rotation exist, and the rotation center of the second main swing arm relative to the base is different in the two conditions. In other words, the motion track of the second main swing arm in the state switching process is changed, and correspondingly, the motion track of the second fixing frame in the state switching process is changed, so that the rotation centers of the real shaft rotation stage and the virtual shaft rotation stage can be designed in a targeted manner, and the design freedom of the foldable mechanism in the state switching process is improved.

In one embodiment, the sliding portion of the second main swing arm is located between the left side surface of the base and the right side surface of the base when the foldable mechanism is in the folded state. In other words, the sliding part of the second main swing arm does not protrude relative to the side surface of the base, and the sliding part of the second main swing arm completely reuses the thickness space of the base, so that the thickness of the foldable mechanism in the folded state is reduced, and the light and thin design of the foldable terminal is facilitated.

In one embodiment, the rotating portion of the second main swing arm is rotatably connected to the second fixing frame. Namely, the second main swing arm is rotationally connected with the second fixing frame. When the second fixing frame rotates relative to the base, the second fixing frame drives the second main swing arm to rotate relative to the second fixing frame and also rotate relative to the base.

The connecting part of the second main swing arm is fixedly connected between the sliding part of the second main swing arm and the rotating part of the second main swing arm.

In one embodiment, the connecting portion of the second main swing arm is fixedly connected with the second fixing frame. Namely, the second main swing arm is fixedly connected with the second fixing frame. When the second fixing frame rotates relative to the base, the second fixing frame drives the second main swing arm to rotate relative to the base.

The connecting part of the second main swing arm is fixedly connected between the second fixing frame and the sliding part of the second main swing arm.

The second main swing arm is fixedly connected with the second fixing frame, so that the assembly stability between the second main swing arm and the second fixing frame can be improved, the structure of the connecting assembly can be simplified, and the structural complexity of the foldable mechanism is reduced.

The second main swing arm and the second fixing frame can be integrally formed, so that the manufacturing cost of the connecting assembly is reduced.

In one embodiment, the base is provided with a second mating groove having a flattened position and a switching position, the flattened position being located inside the switching position. The second matching groove can be an arc-shaped groove, and the groove bottom wall surface and the groove top wall surface of the second matching groove are arc-shaped surfaces.

The sliding part of the second main swing arm is arranged in the second matching groove and can rotate relative to the base in the second matching groove. The sliding part of the second main swing arm can be arc-shaped plate.

In the virtual axis rotation stage, the sliding part of the second main swing arm slides and rotates relative to the base in the second matching groove and slides between the flattening position and the switching position.

In the real-shaft rotation stage, the sliding part of the second main swing arm is positioned at the switching position and rotates relative to the base.

In one embodiment, the base is provided with a second avoidance groove, and an opening of the second avoidance groove is positioned on the bottom wall surface of the second matching groove. The second avoidance groove is recessed from the groove bottom wall surface of the second matching groove in a direction away from the second matching groove.

When the foldable mechanism is in a folded state, the second avoidance groove is avoided by the sliding part of the second main swing arm. The second avoidance groove is away from the part of the sliding part of the second main swing arm, which is far away from the connecting part.

When the second main swing arm rotates relative to the base, the second avoidance groove can avoid interference between the second main swing arm and the base, so that the smoothness of the rotation of the second main swing arm relative to the base is ensured, the movement smoothness of the foldable mechanism is improved, and the comfort level of a user using the foldable terminal is improved.

The connecting assembly of the foldable mechanism further comprises a second auxiliary swing arm, the sliding part of the second auxiliary swing arm slides and is rotationally connected with the second fixing frame, the rotating part of the second auxiliary swing arm is rotationally connected with the base, and the rotating center of the rotating part of the second auxiliary swing arm relative to the base coincides with the second center. That is, the rotation center of the second auxiliary swing arm relative to the base coincides with the second center.

The connecting part of the second auxiliary swing arm is fixedly connected between the sliding part of the second auxiliary swing arm and the rotating part of the second auxiliary swing arm.

In the virtual axis rotation stage, the rotation part of the second auxiliary swing arm rotates relative to the base, and the sliding part of the second auxiliary swing arm slides and rotates relative to the second fixing frame.

In the real shaft rotation stage, the rotation part of the second auxiliary swing arm rotates relative to the base, and the sliding part of the second auxiliary swing arm and the second fixing frame are relatively static.

In one embodiment, the sliding part of the second auxiliary swing arm is provided with a sliding groove, the sliding groove is provided with a first position and a second position, and the first position is positioned on the inner side of the second position. Wherein, the spout can be the arc spout, and the groove top wall face and the groove diapire face of spout are the arcwall face.

The second fixing frame is provided with a sliding part, and the sliding part of the second fixing frame is arranged in the sliding groove and can slide in the sliding groove relative to the sliding part of the first auxiliary swing arm.

In the virtual shaft rotation stage, the sliding part of the second fixing frame slides in the sliding groove relative to the sliding part of the second auxiliary swing arm and slides between the first position and the second position.

In the real shaft rotation stage, the sliding part of the second fixing frame is static relative to the sliding part of the second auxiliary swing arm in the sliding groove and is positioned at the first position.

In one embodiment, the base is provided with a second mating groove having a rotational position and a folded position, the rotational position being located inside the folded position. Wherein, the second mating groove can include an arc-shaped groove portion, and a groove bottom wall surface and a groove top wall surface of the arc-shaped groove portion in the second mating groove are arc-shaped surfaces.

The sliding part of the second main swing arm is arranged at the arc-shaped groove part of the second matching groove and can rotate relative to the base in the arc-shaped groove part of the second matching groove. The sliding part of the second main swing arm can be in a circular shaft shape.

In the virtual axis rotation stage, the sliding part of the second main swing arm slides and rotates relative to the base in the arc-shaped groove part of the second matching groove and slides between the rotation position and the folding position;

In the real-shaft rotation stage, the sliding part of the second main swing arm is positioned at the rotation position and rotates relative to the base.

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

In the foldable terminal, when the foldable mechanism is switched between the folded state and the unfolded state, the first main swing arm rotates relative to the base, and the first main swing arm rotates relative to the base in the two conditions of real-axis rotation and virtual-axis rotation. In other words, the motion track of the first main swing arm in the state switching process is changed, and correspondingly, the motion track of the first fixing frame in the state switching process is changed, so that the rotation centers of the real shaft rotation stage and the virtual shaft rotation stage can be designed in a targeted manner, and the design freedom of the foldable mechanism in the state switching process is improved.

In one embodiment, the foldable terminal further comprises a display screen, the display screen further comprises a first display portion, a second display portion and a foldable portion, the foldable portion is fixedly connected between the first display portion and the second display portion, the first display portion is mounted on the first shell, the second display portion is mounted on the second shell, and the foldable portion is arranged opposite to the foldable mechanism.

In the foldable terminal, the foldable mechanism is beneficial to changing the movement track of the display screen in the folding and unfolding processes, improving the design freedom degree of the movement track of the display screen, improving the stress state of the display screen in the movement process, solving the problems of crease and inverted arch generated by the display screen, prolonging the service life of the display screen and ensuring the use reliability of the foldable terminal.

Drawings

In order to more clearly describe the technical solution of the embodiments of the present application, the following description will explain the drawings required to be used by the embodiments of the present application.

Fig. 1 is a schematic structural view of a first foldable terminal provided in an embodiment of the present application in a folded state;

FIG. 2 is a schematic view of the foldable terminal of FIG. 1 in an unfolded state;

FIG. 3 is an exploded view of the foldable terminal of FIG. 2;

fig. 4 is an exploded view of a folder in the folder terminal of fig. 3;

FIG. 5 is a schematic view of the folding mechanism of the folding device of FIG. 4;

FIG. 6 is an exploded view of the folding mechanism of FIG. 5;

FIG. 7 is a schematic view of the base of the folding mechanism of FIG. 6;

FIG. 8 is a schematic view of the damping assembly and synchronizing assembly of the folding mechanism of FIG. 6;

FIG. 9 is a schematic view of the connection assembly of the foldable mechanism of FIG. 6;

FIG. 10 is a schematic view of the connection assembly of FIG. 9 at another angle;

FIG. 11 is a schematic cross-sectional view of the folding mechanism of FIG. 5 taken along line I-I;

FIG. 12 is a schematic view of the folding mechanism of FIG. 11 in a folded state;

FIG. 13 is a schematic view of the folding mechanism of FIG. 5 in a folded position, taken along section II-II;

FIG. 14 is a schematic view of the folding mechanism of FIG. 11 in a semi-folded state;

FIG. 15 is a schematic view of the platen assembly of the folding mechanism of FIG. 6;

FIG. 16 is a schematic view of the platen assembly of FIG. 15 at another angle;

FIG. 17 is a schematic cross-sectional view of the foldable terminal of FIG. 2;

fig. 18 is a schematic view of the foldable terminal shown in fig. 17 in a folded state;

fig. 19 is a schematic structural view of a foldable mechanism in a second foldable terminal according to an embodiment of the present application;

FIG. 20 is an exploded view of the folding mechanism of FIG. 19;

FIG. 21 is a schematic view of the base of the folding mechanism of FIG. 20;

FIG. 22 is a schematic view of the damping assembly and synchronizing assembly of the folding mechanism of FIG. 20;

FIG. 23 is a schematic view of the configuration of the pressure plate assembly of the foldable mechanism of FIG. 20;

FIG. 24 is a schematic view of the platen assembly of FIG. 23 at another angle;

FIG. 25 is a schematic view of the connection assembly of the foldable mechanism of FIG. 20;

FIG. 26 is a schematic view of the connection assembly of FIG. 25 at another angle;

FIG. 27 is a schematic cross-sectional view of the folding mechanism of FIG. 19 taken along line III-III;

FIG. 28 is a schematic view of the folding mechanism of FIG. 27 in a folded state;

FIG. 29 is a schematic view of the folding mechanism of FIG. 19 in a folded position, taken along line IV-IV;

FIG. 30 is a schematic view of the folding mechanism of FIG. 27 in a semi-folded state;

FIG. 31 is a schematic cross-sectional view of a second foldable terminal according to an embodiment of the present application in a flattened state;

fig. 32 is a schematic view of the foldable terminal shown in fig. 31 in a folded state;

fig. 33 is a schematic view showing a partial structure of a folding mechanism in a third foldable terminal according to an embodiment of the present application;

FIG. 34 is an exploded view of the folding mechanism of FIG. 33;

FIG. 35 is a schematic view of the base of the folding mechanism of FIG. 34;

FIG. 36 is a schematic view of the connection assembly of the foldable mechanism of FIG. 34;

FIG. 37 is a schematic view of the connection assembly of FIG. 36 at another angle;

FIG. 38 is a schematic cross-sectional view of the folding mechanism of FIG. 33 taken along line V-V;

FIG. 39 is a schematic cross-sectional view of the folding mechanism of FIG. 33 taken along line VI-VI;

FIG. 40 is a schematic view of the folding mechanism of FIG. 38 in a folded state;

FIG. 41 is a schematic view of the folding mechanism of FIG. 39 in a folded state;

FIG. 42 is a schematic view of the folding mechanism of FIG. 38 in a semi-folded state;

FIG. 43 is a schematic view of the folding mechanism of FIG. 39 in a semi-folded state;

FIG. 44 is a schematic view of the configuration of the pressure plate assembly of the foldable mechanism of FIG. 34;

FIG. 45 is a schematic view of the platen assembly of FIG. 44 at another angle;

FIG. 46 is a schematic cross-sectional view of a third foldable terminal according to an embodiment of the present application in a flattened state;

fig. 47 is a schematic view of the foldable terminal shown in fig. 46 in a folded state.

Detailed Description

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

Referring to fig. 1 and 2, fig. 1 is a schematic structural view of a first foldable terminal 1000 in a folded state according to an embodiment of the present application, and fig. 2 is a schematic structural view of the foldable terminal 1000 in an unfolded state shown in fig. 1.

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

For convenience of description, the width direction of the foldable terminal 1000 shown in fig. 2 is defined as an X-axis direction, the length direction of the foldable terminal 1000 is defined as a Y-axis direction, and the thickness direction of the foldable terminal 1000 is defined as a Z-axis direction, and the X-axis direction, the Y-axis direction, and the Z-axis direction are perpendicular to each other. Illustratively, the axis of rotation of foldable terminal 1000 extends in a direction parallel to the Y-axis direction. That is, foldable terminal 1000 can be relatively unfolded or relatively folded about the Y-axis direction.

It should be noted that, in the embodiments of the present application, the definitions of the relative positional relationships, such as parallel and perpendicular, are all defined with respect to the current state of the art, and are not strictly defined in a mathematical sense, and a small deviation is allowed, which is similar to parallel and similar to perpendicular. For example, a is parallel to B, meaning that a is parallel or approximately parallel to B, and the angle between a and B may be between 0 degrees and 10 degrees. For example, A is perpendicular to B, meaning that A is perpendicular or approximately perpendicular to B, and the included angle between A and B is between 80 degrees and 100 degrees.

The foldable terminal 1000 shown in fig. 1 is in a folded state, the foldable terminal 1000 has a smaller size along the X-axis direction, and the foldable terminal 1000 is convenient to carry. Foldable terminal 1000 is shown in fig. 2 in an unfolded state. Illustratively, the folding terminal 1000 shown in FIG. 2 has an unfolding angle α of 180 degrees. In other words, foldable terminal 1000 is shown in fig. 2 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.

It should be noted that the angles illustrated in the embodiments of the present application allow for slight deviations. For example, an angle of deployment α of the foldable terminal 1000 shown in fig. 2 of 180 degrees means that α may be 180 degrees, or may be about 180 degrees, such as 170 degrees, 175 degrees, 185 degrees, 190 degrees, etc. The angles illustrated hereinafter are to be understood identically.

It should be understood that foldable terminal 1000 in accordance with the embodiments of the present application is shown as a terminal that can be folded once. In other embodiments, foldable terminal 1000 can also be a terminal that can be folded multiple times (more than two times). At this time, foldable terminal 1000 may include a plurality of sections, and two adjacent sections may be folded relatively close to each other until foldable terminal 1000 is in a folded state, and two adjacent sections may be unfolded relatively away from each other until foldable terminal 1000 is in an unfolded state.

Referring to fig. 3, fig. 3 is an exploded view of the foldable terminal 1000 shown in fig. 2.

Foldable terminal 1000 includes foldable device 100 and display 200, display 200 being mounted to foldable device 100. The display 200 includes a display surface 201 facing away from the foldable device 100, the display surface 201 being configured to display text, images, or video. In this embodiment, the display screen 200 includes a first display portion 210, a second display portion 220, and a foldable portion 230, the foldable portion 230 being connected between the first display portion 210 and the second display portion 220. Wherein the foldable portion 230 may be bent around the Y-axis direction.

As shown in fig. 1, when foldable terminal 1000 is in a folded state, foldable device 100 and display 200 are both in a folded state, first display portion 210 and second display portion 220 are disposed opposite to each other, and foldable portion 230 is folded. At this time, the exposed area of the display screen 200 is relatively small, so that the probability of damaging the display screen 200 can be greatly reduced, and effective protection of the display screen 200 can be realized.

As shown in fig. 2, when foldable terminal 1000 is in the flattened state, foldable device 100 and display screen 200 are both in the flattened state, first display portion 210 and second display portion 220 are relatively flattened, and foldable portion 230 is flattened without bending. At this time, the included angle between the first display portion 210 and the second display portion 220, the included angle between the first display portion 210 and the foldable portion 230, and the included angle between the second display portion 220 and the foldable portion 230 are all α, and the display screen 200 has a large-area display area, so as to implement large-screen display of the foldable terminal 1000, and improve the user experience.

It should be understood that foldable terminal 1000 in the embodiment of the present application is folded in an inward folding manner, and that display 200 is located inside foldable device 100 when foldable terminal 1000 is in the folded state. In other embodiments, foldable terminal 1000 can also be folded in an outward folding manner, with display 200 positioned outside of foldable device 100 when foldable terminal 1000 is in the folded state.

Referring to fig. 3 and 4, fig. 4 is a schematic exploded view of the foldable device 100 in the foldable terminal 1000 shown in fig. 3.

The foldable device 100 includes a first housing 110, a second housing 120, and a foldable mechanism 130, the foldable mechanism 130 being connected between the first housing 110 and the second housing 120 to enable a rotational connection between the first housing 110 and the second housing 120. Specifically, the first housing 110 carries the first display portion 210, and the second housing 120 carries the second display portion 220. In other words, the first display portion 210 is mounted to the first housing 110, and the second display portion 220 is mounted to the second housing 120. Wherein the foldable mechanism 130 is disposed opposite the foldable portion 230.

The first housing 110 and the second housing 120 are relatively rotatable by the foldable mechanism 130 such that the foldable device 100 is switched between a folded state and an unfolded state. Specifically, the first housing 110 and the second housing 120 may be relatively rotated to a relative position to place the foldable device 100 in a folded state, as shown in fig. 1. At this time, the foldable mechanism 130 is in a folded state. First housing 110 and second housing 120 may also be relatively rotated to a relatively flattened state such that foldable terminal 1000 is in a flattened state, as shown in fig. 2. At this time, the angle between the first housing 110 and the second housing 120 is α, and the foldable mechanism 130 is in a flattened state.

The first housing 110 is provided with a receiving groove 1101, and the receiving groove 1101 is located at a side of the first housing 110 facing the second housing 120. The opening of the receiving groove 1101 is located at the top surface of the first housing 110. The accommodation groove 1101 is recessed from the top surface of the first housing 110 toward the bottom surface, and penetrates the first housing 110 toward the side surface of the second housing 120. The side of the first housing 110 facing the second housing 120 is the left side of the first housing 110.

It should be noted that, in describing the foldable terminal 1000 according to the embodiments of the present application, terms such as "top", "bottom", "left", "right", "front" and "rear" are mainly described according to the display orientation of the foldable terminal 1000 in fig. 2, and do not limit the orientation of the foldable terminal 1000 in a practical application scenario.

The second housing 120 and the first housing 110 are identical in structure and mirror-symmetrical with respect to the foldable mechanism 130. The second housing 120 is provided with a receiving groove 1201, and the receiving groove 1201 is located at a side of the second housing 120 facing the first housing 110. The opening of the receiving groove 1201 is located at the top surface of the second housing 120. The accommodating groove 1201 is recessed from the top surface of the second housing 120 toward the bottom surface, and penetrates the second housing 120 toward the side surface of the first housing 110. The side of the second housing 120 facing the first housing 110 is the right side of the second housing 120.

When the foldable device 100 is in the flattened state, that is, when the included angle between the first housing 110 and the second housing 120 is α, the accommodating groove 1101 of the first housing 110 and the accommodating groove 1201 of the second housing 120 enclose to form an accommodating space 1301. The foldable mechanism 130 is mounted in the housing space 1301. Wherein, the part of the foldable mechanism 130 is mounted in the accommodating groove 1101 of the first housing 110, and the part of the foldable mechanism 130 is mounted in the accommodating groove 1201 of the second housing 120.

In the existing foldable terminal, the foldable device drives the display screen to fold and unfold in the process that the movement track of the display screen is fixed in the whole course, the designability of the movement track of the display screen is small, the display screen is extremely easy to generate crease, anti-arching and other pain points, the service life of the display screen is shortened, and therefore the use reliability of the foldable terminal is affected.

In addition, in the existing folding mechanism, the swing arm and the base are often in rotational connection through a virtual shaft, when the folding mechanism is in a folding state, the swing arm is folded relative to the base, for example, the swing arm is folded by 90 degrees relative to the base, the swing arm can be inevitably protruded relative to the side face of the base, so that the swing arm has a protruded distance in the thickness direction of the whole machine, the thickness of the folding terminal is increased, and the light and thin design of the folding terminal is not facilitated. Next, the structure of the foldable mechanism 130 in the foldable terminal 1000 according to the embodiment of the present application will be described.

Referring to fig. 5 and 6, fig. 5 is a schematic structural view of the folding mechanism 130 in the folding device 100 shown in fig. 4, and fig. 6 is an exploded structural view of the folding mechanism 130 shown in fig. 5.

The collapsible mechanism 130 includes a base 10, a connection assembly 20, a damping assembly 30, a platen assembly 40, and a synchronization assembly 50. Illustratively, the base 10 extends in the Y-axis direction. The connection assembly 20, the damping assembly 30, and the synchronization assembly 50 are all mounted to the base 10. The connection assembly 20 rotates the connection base 10 and can be folded or unfolded with respect to the base 10. Damping assembly 30 is slidably coupled to coupling assembly 20. The platen assembly 40 slides and rotatably connects the link assembly 20. The synchronizing assembly 50 is coupled to the damping assembly 30. Wherein, the damping component 30 and the pressing board component 40 can be folded or unfolded relative to the base 10 under the driving of the connecting component 20.

When the collapsible mechanism 130 is in the collapsed state, the connection assembly 20, the damping assembly 30, and the platen assembly 40 are all in the collapsed state. When the collapsible mechanism 130 is in the expanded state, the connection assembly 20, the damping assembly 30, and the platen assembly 40 are all in the expanded state. During the process of switching the foldable mechanism 130 from the folded state to the unfolded state, the connection assembly 20, the damping assembly 30 and the platen assembly 40 are all switched from the folded state to the unfolded state. In the process of switching the foldable mechanism 130 from the unfolded state to the folded state, the connection assembly 20, the damping assembly 30 and the platen assembly 40 are all switched from the unfolded state to the folded state.

The connection assembly 20 includes a first mount 21, a second mount 22, a first main swing arm 23, and a second main swing arm 24. The first fixing frame 21 is located at one side of the base 10, and the second fixing frame 22 is located at the other side of the base 10. The first main swing arm 23 is connected between the first fixing frame 21 and the base 10, and the second main swing arm 24 is connected between the second fixing frame 22 and the base 10. Wherein, the first main swing arm 23 is rotatably connected with the first fixing frame 21 and is rotatably connected with the base 10. The second main swing arm 24 is rotatably connected to the second fixing frame 22 and rotatably connected to the base 10.

In this embodiment, there are two first main swing arms 23 and two second main swing arms 24. The two first main swing arms 23 are a first front main swing arm 23a and a first rear main swing arm 23b, respectively, and the first front main swing arm 23a and the first rear main swing arm 23b are arranged at intervals from each other along the Y-axis direction. The two second main swing arms 24 are a second front main swing arm 24a and a second rear main swing arm 24b, respectively, and the second front main swing arm 24a and the second rear main swing arm 24b are spaced apart from each other in the Y-axis direction. The first front main swing arm 23a and the second rear main swing arm 24b are centrally symmetrical, and the second rear main swing arm 24b and the first front main swing arm 23a are centrally symmetrical. In other embodiments, the number of the first main swing arms 23 may be one or more than three, and/or the number of the second main swing arms 24 may be one or more than three, which is not particularly limited in the embodiment of the present application.

It should be understood that references to "and/or" in the embodiments of the present application are intended to mean both "and" or "cases. For example, a and/or B includes three cases where a only exists, B only exists, and a and B exist simultaneously, and the description of "and/or" will be understood identically hereinafter.

When the connection assembly 20 is switched between the folded state and the unfolded state, the rotation direction of the first fixing frame 21 and the first main swing arm 23 relative to the base 10 is a first direction, the rotation direction of the second fixing frame 22 and the second main swing arm 24 relative to the base 10 is a second direction, and the second direction is opposite to the first direction. Illustratively, when the connection assembly 20 is switched from the folded state to the unfolded state, the first fixing frame 21 and the first main swing arm 23 rotate in a counterclockwise direction relative to the base 10, and the second fixing frame 22 and the second main swing arm 24 rotate in a clockwise direction relative to the base 10. When the connection assembly 20 is switched from the unfolded state to the folded state, the first fixing frame 21 and the first main swing arm 23 rotate in the clockwise direction relative to the base 10, and the second fixing frame 22 and the second main swing arm 24 rotate in the counterclockwise direction relative to the base 10.

In this embodiment, only one connection assembly 20 is provided. In other embodiments, there may be a plurality of connection assemblies 20, and the plurality of connection assemblies 20 are spaced apart from each other along the Y-axis direction. Wherein the plurality of connection assemblies 20 may be identical or similar assemblies, symmetrical or partially symmetrical structures, or different structures. For example, the basic structure of the individual components of each connection assembly 20, the connection between components, and the connection between components and components other than the assembly may be referred to hereinafter as the connection assembly 20, and may also differ from the connection assembly 20 in the detailed structure or positional arrangement of the components. The first fixing frames 21 of the plurality of connection assemblies 20 may be independent structural members or may be formed as a plurality of portions of an integral structural member. And/or, the second fixing frames 22 of the plurality of connection assemblies 20 may be independent structural members or may be a plurality of parts of an integral structural member.

The damping assembly 30 is slidably coupled to both the first mount 21 and the second mount 22. The damping assembly 30 may provide a damping force during folding or unfolding of the connection assembly 20 relative to the base 10. During the process of using the foldable terminal 1000, for example, when the foldable terminal 1000 is in a folded state or a flattened state, and when the foldable terminal 1000 is switched between the folded state and the flattened state, the user can obviously feel the damping force provided by the damping component 30, and the user can experience better hand feeling, so that the use experience of the user is improved.

In the present embodiment, the damper assembly 30 includes a damper 31, a first damper swing arm 32, and a second damper swing arm 33. The damper 31 is mounted to the base 10. The first damping swing arm 32 is hinged to the damping member 31 and is slidably connected to the first fixing frame 21. The second damping swing arm 33 is hinged to the damping member 31 and is slidably connected to the second fixing frame 22.

In this embodiment, only one damping assembly 30 is provided. In other embodiments, there may be a plurality of damper assemblies 30, and the plurality of damper assemblies 30 may be spaced apart from each other along the Y-axis direction. Wherein the plurality of damping assemblies 30 may be the same or similar components, symmetrical or partially symmetrical structures, or different structures. For example, the basic structure of the various components of each damping assembly 30, the connection between the components, and the connection between the components and the components other than the assembly may be referred to hereinafter as the relevant designs of the damping assemblies 30, and may differ from the hereinafter detailed structure or positional arrangement of the components of the damping assemblies 30.

The pressing plate assembly 40 is slidably and rotatably connected with the first fixing frame 21, the second fixing frame 22, the first main swing arm 23 and the second main swing arm 24. In this embodiment, the platen assembly 40 includes a first platen 41 and a second platen 42. The front side of the first pressing plate 41 is slidably and rotatably connected with the first front main swing arm 23a, the rear side of the first pressing plate 41 is slidably and rotatably connected with the second rear main swing arm 24b, and the middle part of the first pressing plate 41 is slidably and rotatably connected with the first fixing frame 21. The front side of the second pressing plate 42 is slidably and rotatably connected with the second front main swing arm 24a, the rear side of the second pressing plate 42 is slidably and rotatably connected with the second rear main swing arm 24b, and the middle part of the second pressing plate 42 is slidably and rotatably connected with the second fixing frame 22.

In other embodiments, the platen assembly 40 may further include a first platen swing arm and a second platen swing arm, where the first platen swing arm is slidably connected to the first fixing frame 21 and is rotatably connected to the base 10, and the second platen swing arm is slidably connected to the second fixing frame 22 and is rotatably connected to the base 10, and the structure of the platen assembly 40 is not specifically limited in the embodiments of the present application.

Referring to fig. 6 and 7, fig. 7 is a schematic structural view of the base 10 in the foldable mechanism 130 shown in fig. 6.

The base 10 is provided with a first fitting groove 101, a second fitting groove 102, a relief hole 103, a first relief groove 104, and a second relief groove 105. The opening of the first fitting groove 101 is located on the right side surface (not shown) of the base 10. The first fitting groove 101 is recessed from the right side surface of the base 10 to the left side surface (not shown) in a direction (X-axis positive direction in the drawing). Wherein the first fitting groove 101 is an arc-shaped groove. That is, the groove top wall surface (not shown) and the groove bottom wall surface (not shown) of the first fitting groove 101 are both arc-shaped surfaces and coaxial. Illustratively, the axis of the first mating groove 101 is parallel to the Y-axis direction.

It should be noted that, the phrase "coaxial" in the embodiments of the present application means that the extended lines of the axes coincide with each other. For example, the coaxial centers of a and B means that the extended line of the axis of a coincides with the extended line of the axis of B, and the description of "coaxial center" will be understood in the same manner.

Further, the first fitting groove 101 has a flattened position and a switching position. Specifically, the flattened position of the first fitting groove 101 is located inside the switching position of the first fitting groove 101. Illustratively, the flattened position of the first mating groove 101 is located at the innermost side of the first mating groove 101, and the switching position of the first mating groove 101 is located at the outermost side of the first mating groove 101. In other embodiments, the flattened position of the first mating groove 101 may be located at other positions of the first mating groove 101, and/or the switching position of the first mating groove 101 may be located at other positions of the first mating groove 101.

It should be noted that the terms "inner" and "outer" in the directions of the foldable mechanism 130 according to the embodiments of the present application are mainly described with reference to the directions of the foldable mechanism 130 shown in fig. 6, so as to be "inner" toward the base 10 and "outer" away from the base 10, which does not limit the directions of the foldable terminal 1000 in the practical application scenario.

The opening of the second fitting groove 102 is located at the left side surface of the base 10. The second fitting groove 102 is recessed from the left side surface to the right side surface of the base 10 (X-axis negative direction is shown). The first fitting groove 101 and the second fitting groove 102 are disposed opposite to each other in the X-axis direction. Wherein the second mating groove 102 is an arcuate groove. That is, the groove top wall surface (not shown) and the groove bottom wall surface (not shown) of the second fitting groove 102 are both arc-shaped surfaces and coaxial. Illustratively, the axis of the second mating groove 102 is parallel to the Y-axis direction.

Further, the second mating groove 102 has a flattened position and a switching position. Specifically, the flattened position of the second mating groove 102 is located inside the switching position of the second mating groove 102. Illustratively, the flattened position of the second mating groove 102 is located innermost of the second mating groove 102 and the switch position of the second mating groove 102 is located outermost of the second mating groove 102. In other embodiments, the flattened position of the second mating slot 102 may be located elsewhere in the second mating slot 102, and/or the switch position of the second mating slot 102 may be located elsewhere in the second mating slot 102.

The opening of the relief hole 103 is located on the top surface (not shown) of the base 10. The escape hole 103 is recessed from the top surface of the base 10 toward the bottom surface (negative Z-axis direction in the drawing) and communicates with the first engagement groove 101 and the second engagement groove 102. Illustratively, the relief aperture 103 is a square aperture. In other embodiments, the relief holes 103 may be circular holes or other shaped holes.

The first avoidance groove 104 is located at the groove bottom wall of the first mating groove 101, and the second avoidance groove 105 is located at the groove bottom wall of the second mating groove 102. Specifically, the opening of the first escape groove 104 is located on the groove bottom wall surface of the first fitting groove 101, and the first escape groove 104 is recessed from the groove bottom wall surface of the first fitting groove 101 in the direction (negative Z-axis direction in the drawing) facing the bottom surface of the base 10. The opening of the second avoidance groove 105 is located on the groove bottom wall surface of the second fitting groove 102. The second escape groove 105 is recessed from the groove bottom wall of the second fitting groove 102 in a direction (negative Z-axis direction in the drawing) facing the bottom surface of the base 10.

In this embodiment, the first engaging groove 101, the second engaging groove 102, the avoiding hole 103, the first avoiding groove 104, and the second avoiding groove 105 are two. The two first mating grooves 101 are a first front mating groove 101a and a first rear mating groove 101b, respectively, and the first front mating groove 101a and the first rear mating groove 101b are coaxial. The two second mating grooves 102 are a second front mating groove 102a and a second rear mating groove 102b, respectively, the second front mating groove 102a and the second rear mating groove 102b being concentric. The two avoidance holes 103 are respectively a front avoidance hole 103a and a rear avoidance hole 103b, the two first avoidance grooves 104 are respectively a first front avoidance groove 104a and a first rear avoidance groove 104b, and the two second avoidance grooves 105 are respectively a second front avoidance groove 105a and a second rear avoidance groove 105b. Specifically, the first front mating groove 101a, the second front mating groove 102a, the front relief hole 103a, the first front relief groove 104a, and the second front relief groove 105a are all located at the front end portion (not shown) of the base 10. The first rear engagement groove 101b, the second rear engagement groove 102b, the rear escape hole 103b, the first rear escape groove 104b, and the second rear escape groove 105b are all located at the rear end portion (not shown) of the base 10. In the X-axis direction, the first front fitting groove 101a and the second front fitting groove 102a are disposed opposite to each other, and the first rear fitting groove 101b and the second rear fitting groove 102b are disposed opposite to each other. The front relief hole 103a communicates with the first front fitting groove 101a and the second front fitting groove 102a, and the rear relief hole 103b communicates with the first rear fitting groove 101b and the second rear fitting groove 102b. The first front relief groove 104a is located at the groove bottom wall of the first front fitting groove 101a, and the first rear relief groove 104b is located at the groove bottom wall of the first rear fitting groove 101 b. The second front relief groove 105a is located at the groove bottom wall of the second front mating groove 102a, and the second rear relief groove 105b is located at the groove bottom wall of the second rear mating groove 102b.

The first front avoidance groove 104a and the second rear avoidance groove 105b are centrally symmetrical, and the first rear avoidance groove 104b and the second front avoidance groove 105a are centrally symmetrical. The first front avoidance groove 104a and the second rear avoidance groove 105b each include two avoidance portions (not shown), and in the Y-axis direction, the two avoidance portions of the first front avoidance groove 104a are arranged at intervals, and the two avoidance portions of the second rear avoidance groove 105b are arranged at intervals.

In addition, the base 10 is also provided with a first mounting groove 106 and a second mounting groove 107. The openings of the first mounting groove 106 and the second mounting groove 107 are located on the top surface (not shown) of the base 10. The first mounting groove 106 and the second mounting groove 107 are each recessed from the top surface of the base 10 toward the bottom surface. Specifically, the first mounting groove 106 and the second mounting groove 107 are each located in the middle (not shown) of the base 10, and are spaced apart from each other in the Y-axis direction. Wherein the first mounting groove 106 is located at the front side of the second mounting groove 107.

In this embodiment, the base 10 includes a shaft cover 11, a first bracket 12, a second bracket 13, and a third bracket 14, where the first bracket 12, the second bracket 13, and the third bracket 14 are fixedly connected to the shaft cover 11. The first bracket 12, the second bracket 13, and the third bracket 14 may be fixedly coupled to the shaft cover 11 by fixing members such as screws or bolts. In other embodiments, the shaft cover 11, the first bracket 12, the second bracket 13, and the third bracket 14 may be integrally formed.

Wherein the shaft cover 11 extends in the Y-axis direction. The front end portion (not shown) of the shaft cover 11 is provided with a first front escape groove 104a and a second front escape groove 105a, and the rear end portion (not shown) of the shaft cover 11 is provided with a first rear escape groove 104b and a second rear escape groove 105b. Illustratively, the shaft cover 11 is an integrally formed structural member. In other embodiments, the shaft cover 11 may also be an integral structural member formed by assembly.

The first bracket 12 is fixedly connected to the front end portion of the shaft cover 11, and forms a first front fitting groove 101a and a second front fitting groove 102a with the front end portion of the shaft cover 11. Wherein the first bracket 12 forms the front end of the base 10 together with the front end of the shaft cover 11.

The first bracket 12 is provided with a front avoidance hole 103a, a first mounting hole (not shown), and a second mounting hole (not shown). The front escape hole 103a is located at the middle of the first bracket 12, and penetrates the first bracket 12 in the thickness direction (the illustrated Z-axis direction) of the first bracket 12. The first and second mounting holes are located at the rear end portion (not shown) of the first bracket 12. The openings of the first mounting hole and the second mounting hole are located on the rear end face (not shown) of the first bracket 12. The first mounting hole and the second mounting hole are each recessed from the rear end surface of the first bracket 12 in the direction of the front end surface (not shown) thereof (the negative Y-axis direction is shown). The second mounting hole is positioned on the left side of the first mounting hole and is arranged at intervals with the first mounting hole.

The second bracket 13 is fixedly connected to a rear end portion (not shown) of the shaft cover 11 and is disposed at a distance from the first bracket 12. Specifically, the second bracket 13 encloses the rear end portion of the shaft cover 11 to form a first rear fitting groove 101b and a second rear fitting groove 102b. Wherein the second bracket 13 forms the rear end of the base 10 together with the rear end of the shaft cover 11.

The second bracket 13 is provided with a rear avoidance hole 103b, a first fitting hole 131, a second fitting hole 132, and a third fitting hole 133. The rear escape hole 103b is located at the middle of the second bracket 13, and penetrates the second bracket 13 in the thickness direction (the illustrated Z-axis direction) of the second bracket 13. The first, second and third fitting holes 131, 132 and 133 are each located at a front end portion (not shown) of the second bracket 13. The openings of the first, second and third fitting holes 131, 132 and 133 are all located at the front end face (not shown) of the second bracket 13. The first, second and third fitting holes 131, 132 and 133 are each recessed from the front end face of the second bracket 13 toward the rear end face (not shown) in a direction (negative Y-axis direction shown). The second assembly hole 132 is located at the left side of the first assembly hole 131 and is spaced apart from the first assembly hole 131. The third fitting holes 133 are two, and the two third fitting holes 133 are each located between the first fitting hole 131 and the second fitting hole 132 in the X-axis direction and spaced apart from each other.

The third bracket 14 is fixedly connected to the middle part (not shown) of the shaft cover 11, and the third bracket 14 is located between the first bracket 12 and the second bracket 13 along the Y-axis direction and is spaced from both the first bracket 12 and the second bracket 13. Specifically, the third bracket 14 forms a first mounting groove 106 around the middle parts of the first bracket 12 and the shaft cover 11, and forms a second mounting groove 107 around the middle parts of the second bracket 13 and the shaft cover 11. Wherein the third bracket 14 forms the middle part of the base 10 together with the middle part of the shaft cover 11.

The third bracket 14 is provided with a first through hole 141, a second through hole 142, and a fitting hole (not shown). The first through hole 141 and the second through hole 142 each penetrate the third bracket 14 in the Y-axis direction, and communicate with the first mounting groove 106 and the second mounting groove 107. The fitting hole is located at the rear end portion (not shown) of the third bracket 14. The opening of the fitting hole is located at the front end face (not shown) of the third bracket 14. The fitting hole is recessed from the front end face of the third bracket 14 toward the rear end face (not shown) in the direction (negative Y-axis direction in the drawing). The second through hole 142 is located at the left side of the first through hole 141 and is spaced apart from the first through hole 141. There are two fitting holes, which are located between the first through hole 141 and the second through hole 142 in the X-axis direction and are spaced apart from each other.

Further, in the Y-axis direction, the first through hole 141 of the third bracket 14 is disposed opposite to the first mounting hole of the first bracket 12 and the first fitting hole 131 of the second bracket 13, the second through hole 142 of the third bracket 14 is disposed opposite to the second mounting hole of the first bracket 12 and the second fitting hole 132 of the second bracket 13, and the two fitting holes of the third bracket 14 are disposed opposite to the two third fitting holes 133 of the second bracket 13, respectively.

Referring to fig. 6, 7 and 8, fig. 8 is a schematic structural view of the damping assembly 30 and the synchronizing assembly 50 in the foldable mechanism 130 shown in fig. 6.

The synchronizing assembly 50 is mounted to the first mounting slot 106 and the second mounting slot 107. In this embodiment, the synchronizing assembly 50 includes a first synchronizing shaft 51, a second synchronizing shaft 52, a first synchronizing gear 53, a second synchronizing gear 54, a transmission shaft 55, and a transmission gear 56. Specifically, the first synchronizing shaft 51 and the second synchronizing shaft 52 are mounted in the first mounting groove 106 and the second mounting groove 107, and are rotatable relative to the base 10. The first synchronizing shaft 51 is disposed through the first through hole 141 of the third bracket 14, one end of the first synchronizing shaft 51 is mounted in the first mounting hole of the first bracket 12, and the other end is mounted in the first mounting hole 131 of the second bracket 13. The second synchronizing shaft 52 is disposed through the second through hole 142 of the third bracket 14, one end of the second synchronizing shaft 52 is mounted in the second mounting hole of the first bracket 12, and the other end is mounted in the second mounting hole 132 of the second bracket 13. Illustratively, the axes of the first and second synchronization shafts 51, 52 are each parallel to the Y-axis direction. The first synchronization shaft 51 and the second synchronization shaft 52 are arranged in parallel and at intervals in the X-axis direction.

The first synchronizing gear 53, the second synchronizing gear 54, the transmission shaft 55, and the transmission gear 56 are all mounted in the second mounting groove 107. Specifically, the first synchronization gear 53 is sleeved on the first synchronization shaft 51, and can rotate relative to the base 10 under the driving of the first synchronization shaft 51. The second synchronizing gear 54 is sleeved on the second synchronizing shaft 52, and can rotate relative to the base 10 under the driving of the second synchronizing shaft 52. Illustratively, the first synchronizing gear 53 is concentric with the first synchronizing shaft 51, and the second synchronizing gear 54 is concentric with the second synchronizing shaft 52. The first and second synchronizing gears 53 and 54 are arranged in parallel and at intervals in the X-axis direction.

In the X-axis direction, the transmission shaft 55 is located between the first synchronization shaft 51 and the second synchronization shaft 52, and is disposed at a distance from both the first synchronization shaft 51 and the second synchronization shaft 52. Illustratively, there are two drive shafts 55, and the axes of both drive shafts 55 are parallel to the Y-axis direction. Along the X-axis direction, two drive shafts 55 are arranged at intervals. Specifically, one end of each transmission shaft 55 is mounted to one third mounting hole 133 of the second bracket 13, and the other end is mounted to one mating hole of the third bracket 14.

The transmission gears 56 are two, and the two transmission gears 56 are respectively sleeved on the two transmission shafts 55 and meshed with each other. Wherein one transfer gear 56 is meshed with the first synchronizing gear 53 and the other transfer gear 56 is meshed with the second synchronizing gear 54. Illustratively, the axes of both drive gears 56 are parallel to the Y-axis direction.

When the first synchronizing gear 53 rotates relative to the base 10 under the driving of the first synchronizing shaft 51, the first synchronizing gear 53 can drive the two transmission gears 56 to rotate relative to the base 10, the two transmission gears 56 can drive the second synchronizing gear 54 to rotate relative to the base 10, and the second synchronizing gear 54 can drive the second synchronizing shaft 52 to rotate relative to the base 10, so as to realize the synchronization of the synchronizing assembly 50.

Similarly, when the second synchronizing gear 54 is driven by the second synchronizing shaft 52 to rotate relative to the base 10, the second synchronizing gear 54 can drive the two transmission gears 56 to rotate relative to the base 10, the two transmission gears 56 can drive the first synchronizing gear 53 to rotate relative to the base 10, and the first synchronizing gear 53 can drive the first synchronizing shaft 51 to rotate relative to the base 10, so as to realize the synchronization of the synchronizing assembly 50.

It will be appreciated that in the foldable mechanism 130 of the present embodiment, the synchronizing assembly 50 employs a gear-fit manner to achieve synchronous transmission. In other embodiments, the synchronizing assembly 50 may not use gear engagement to achieve synchronous transmission, but may use other means to achieve synchronous transmission. Alternatively, there may be a plurality of synchronizing assemblies 50, and the plurality of synchronizing assemblies 50 may be arranged at intervals along the Y-axis direction, in which case the plurality of synchronizing assemblies 50 may be identical or similar assemblies, symmetrical or partially symmetrical structures, or different structures. Illustratively, the basic structure of the various components in each synchronization assembly 50, the connection between the components, and the connection between the components and the components outside the assembly may be referred to above with respect to the related design of the synchronization assembly 50, and may differ from the above with respect to the detailed structure or positional arrangement of the components of the synchronization assembly 50.

The damping assembly 30 is mounted in the first mounting groove 106 and sleeved on the first synchronization shaft 51 and the second synchronization shaft 52. Specifically, the damping member 31 is sleeved on the first synchronization shaft 51 and the second synchronization shaft 52. In the present embodiment, the damper 31 includes two elastic bodies 311 and two damping bodies 312. The two elastic bodies 311 are respectively sleeved on the first synchronous shaft 51 and the second synchronous shaft 52 and are arranged at intervals along the X-axis direction. Illustratively, the elastic bodies 311 are springs. In other embodiments, the elastic body 311 may be other elastic structural members.

The two damping bodies 312 are sleeved on the first synchronous shaft 51 and the second synchronous shaft 52, and can slide along the Y-axis direction relative to the first synchronous shaft 51 and the second synchronous shaft 52. Specifically, one damping body 312 is located on the same side of the two elastic bodies 311 and abuts against the same end of the two elastic bodies 311, and the other damping body 312 is located on the other side of the two elastic bodies 311 and abuts against the other end of the two elastic bodies 311. Wherein, along the Y-axis direction, two damping bodies 312 are disposed opposite to each other.

Each damping body 312 includes a first hinge 3121 and a second hinge 3122. The first hinge 3121 and the second hinge 3122 are both located on the same side of the damping body 312 that faces away from the two elastic bodies 311. The second hinge 3122 is located at the left side of the first hinge 3121 and is spaced apart from the first hinge 3121. Wherein, the first hinge portion 3121 and the second hinge portion 3122 each include a hinge surface (not shown), the hinge surface of the first hinge portion 3121 and the hinge surface of the second hinge portion 3122 each include a plurality of peaks and a plurality of valleys, and the plurality of peaks and the plurality of valleys are alternately arranged.

When the two damper bodies 312 slide in the Y-axis direction with respect to the first and second synchronization shafts 51 and 52 to be relatively close, the two elastic bodies 311 are deformed by being pressed by the two damper bodies 312 to generate a damping force. When both the damping bodies 312 slide in the Y-axis direction with respect to the first synchronizing shaft 51 and the second synchronizing shaft 52 to be relatively apart, the two elastic bodies 311 are elastically restored and the damping force is reduced. In the process of folding or unfolding the foldable terminal 1000, the user can feel the change of the damping force and experience better hand feeling, so that the use experience of the user is improved.

The first damping swing arm 32 is sleeved on the first synchronization shaft 51 and is hinged to the first hinge portions 3121 of the two damping bodies 312. In this embodiment, the first damping swing arm 32 includes a rotating portion 321, a sliding portion 322, and a connecting portion 323, and the connecting portion 323 is fixedly connected between the rotating portion 321 and the sliding portion 322. Wherein, the rotating portion 321, the sliding portion 322 and the connecting portion 323 may be integrally formed.

The rotating portion 321 includes two sub rotating portions 324, and the two sub rotating portions 324 are arranged at intervals along the Y-axis direction. Each of the sub-rotating portions 324 includes a hinge surface (not shown) facing the other sub-rotating portion 324, and the hinge surface of each of the sub-rotating portions 324 includes a plurality of peaks and a plurality of valleys alternately arranged. Illustratively, the sub-rotating part 324 is generally cylindrical. Specifically, the two sub-rotating portions 324 are both sleeved on the first synchronization shaft 51 and are hinged to the first hinge portions 3121 of the two damping bodies 312 respectively, so as to realize the hinge between the rotating portion 321 and the two damping bodies 312, and further realize the hinge between the first damping swing arm 32 and the damping member 31. Wherein the hinge surface of each sub-rotation portion 324 is hinged with the hinge surface of each first hinge portion 3121.

The slider 322 includes two sub-sliders 325, and the two sub-sliders 325 are arranged at intervals along the Y-axis direction. Illustratively, each sub-slider 325 is planar. In other embodiments, the sliding portion 322 may not include two sub-sliding portions 325, but may be a complete planar plate, or the sliding portion 322 may include three or more sub-sliding portions 325, and the three or more sub-sliding portions 325 are arranged at intervals along the Y-axis direction, which is not particularly limited in the embodiment of the present application.

The second damping swing arm 33 is sleeved on the second synchronizing shaft 52 and is hinged to the second hinge portions 3122 of the two damping bodies 312. In this embodiment, the second damping swing arm 33 includes a rotating portion 331, a sliding portion 332, and a connecting portion 333, and the connecting portion 333 is fixedly connected between the rotating portion 331 and the sliding portion 332. The structure of the second damping swing arm 33, and the matching relationship between the second damping swing arm 33 and the damping member 31 can be described with reference to the first damping swing arm 32. Specifically, the two sub-rotating portions 334 of the rotating portion 331 are sleeved on the second synchronizing shaft 52, and are hinged to the two second hinge portions 3122 of the damping body 312 respectively. Illustratively, both sub-sliding portions 335 of the sliding portion 332 are planar.

When foldable terminal 1000 (shown in fig. 2) is brought into a flattened state from a folded state, foldable mechanism 130 (shown in fig. 5) is brought into a flattened state from a folded state, damper assembly 30 is brought into a flattened state from a folded state, in first damper swing arm 32, the peak of the hinge surface of sub-rotating portion 324 is brought into the trough of the hinge surface of first hinge portion 3121, the peak of the hinge surface of first hinge portion 3121 is also brought into the trough of the hinge surface of sub-rotating portion 324, in second damper swing arm 33, the peak of the hinge surface of sub-rotating portion 334 is brought into the trough of the hinge surface of second hinge portion 3122, and the peak of the hinge surface of second hinge portion 3122 is brought into the trough of the hinge surface of sub-rotating portion 334. At this time, the damping force generated by the rotation of the first damping swing arm 32 relative to the first synchronization shaft 51 is smaller, and the damping force generated by the rotation of the second damping swing arm 33 relative to the second synchronization shaft 52 is smaller, so that the user can experience the hand feeling that the foldable terminal 1000 is flattened in place.

Note that, in the foldable mechanism 130 of the present embodiment, the damping assembly 30 provides a damping force by using a spring cam. In other embodiments, the damping assembly 30 may provide the damping force in other ways than a spring cam, and embodiments of the present application are not limited in this regard.

In this embodiment, when the first damping swing arm 32 rotates relative to the base 10, the first damping swing arm 32 may drive the first synchronization shaft 51 to rotate relative to the base 10, the first synchronization shaft 51 drives the first synchronization gear 53 to rotate relative to the base 10, the first synchronization gear 53 drives the two transmission gears 56 to rotate relative to the base 10, the two transmission gears 56 drive the second synchronization shaft 52 to rotate relative to the base 10, and the second synchronization shaft 52 drives the second damping swing arm 33 to rotate relative to the base 10, so as to realize synchronous transmission between the first damping swing arm 32 and the second damping swing arm 33.

Similarly, when the second damping swing arm 33 rotates relative to the base 10, the second damping swing arm 33 may drive the second synchronization shaft 52 to rotate relative to the base 10, the second synchronization shaft 52 drives the second synchronization gear 54 to rotate relative to the base 10, the second synchronization gear 54 drives the two transmission gears 56 to rotate relative to the base 10, the two transmission gears 56 drive the first synchronization gear 53 to rotate relative to the base 10, the first synchronization gear 53 drives the first synchronization shaft 51 to rotate relative to the base 10, and the first synchronization shaft 51 drives the first damping swing arm 32 to rotate relative to the base 10, so as to realize synchronous transmission between the first damping swing arm 32 and the second damping swing arm 33.

It can be appreciated that, in the foldable mechanism 130 shown in this embodiment, the first damping swing arm 32 and the second damping swing arm 33 of the damping assembly 30 can also play a role of a synchronous swing arm, so that structural members of the synchronous assembly 50 are saved, structural complexity of the foldable mechanism 130 is reduced, weight of the foldable mechanism 130 is reduced, and light weight design of the foldable terminal 1000 is facilitated.

Referring to fig. 9 and 10, fig. 9 is a schematic structural view of the connecting assembly 20 in the foldable mechanism 130 shown in fig. 6, and fig. 10 is a schematic structural view of the connecting assembly 20 shown in fig. 9 at another angle.

The first holder 21 extends in the Y-axis direction. The first fixing frame 21 is provided with a receiving notch 211, a mounting notch 212, a avoiding notch 213, a sliding hole 214 and a guiding notch 215. The opening of the accommodating notch 211 is located on the top surface (not shown) of the first fixing frame 21. The accommodating notch 211 is recessed from the top surface of the first fixing frame 21 toward the bottom surface (not shown) in the direction (i.e., the negative Z-axis direction) and penetrates the front end surface (not shown), the rear end surface (not shown) and the left side surface (not shown) of the first fixing frame 21. In other embodiments, the accommodating notch 211 may not extend through the front end surface of the first fixing frame 21, and/or the accommodating notch 211 may not extend through the rear end surface of the first fixing frame 21, and/or the accommodating notch 211 may not extend through the left side surface of the first fixing frame 21.

The openings of the mounting notch 212 and the avoidance notch 213 are both positioned on the bottom surface of the first fixing frame 21. The mounting notch 212 and the avoidance notch 213 are recessed from the bottom surface of the first fixing frame 21 toward the top surface (i.e., the positive Z-axis direction in the drawing). The mounting notch 212 penetrates the right side surface (not shown) of the first fixing frame 21, and the avoiding notch 213 penetrates the left side surface of the first fixing frame 21 and the bottom wall surface of the accommodating notch 211, and is communicated with the mounting notch 212. In other embodiments, the mounting notch 212 may not extend through the right side of the first mount 21 and/or the relief notch 213 may not extend through the left side of the first mount 21.

The mounting notch 212 includes two slot side walls (not shown) that are disposed opposite each other in the Y-axis direction. Each of the slot side walls is provided with a mounting hole (not shown), the opening of which is located on the surface of the slot side wall facing the mounting notch 212. The mounting holes are recessed from the groove side walls toward the surface of the mounting gap 212 in a direction away from the mounting gap 212 (i.e., in the Y-axis direction as shown). The two mounting holes are round holes, the axes of the two mounting holes are parallel to the Y-axis direction, and the two mounting holes are coaxial.

In this embodiment, the mounting notch 212 and the avoiding notch 213 are two. The two mounting notches 212 are a front mounting notch 212a and a rear mounting notch 212b, respectively, and the two avoidance notches 213 are a front avoidance notch 213a and a rear avoidance notch 213b, respectively. The front mounting notch 212a and the front avoidance notch 213a are both located at the front end portion (not shown) of the first mount 21 and communicate with each other. The rear mounting notch 212b and the rear escape notch 213b are located at the rear end portion (not shown) of the first fixing frame 21 and communicate with each other. In other embodiments, there may be only one mounting notch 212 and one avoidance notch 213, or there may be three or more mounting notches 212 and avoidance notches 213, which are not particularly limited in this embodiment of the present application.

In addition, the connecting assembly 20 further includes two first rotating shafts 61, and the two first rotating shafts 61 are a first front rotating shaft 61a and a first rear rotating shaft 61b, respectively. Opposite ends of the first front rotating shaft 61a are respectively mounted in mounting holes of two groove side walls in the front mounting notch 212a, and opposite ends of the first rear rotating shaft 61b are respectively mounted in mounting holes of two groove side walls in the rear mounting notch 212 b. Wherein, the axes of the first front rotating shaft 61a and the first rear rotating shaft 61b are parallel to the Y-axis direction, and the first front rotating shaft 61a and the first rear rotating shaft 61b are coaxial.

The slide hole 214 and the guide notch 215 are located in the middle (not shown) of the first fixing frame 21, and along the Y-axis direction, the slide hole 214 and the guide notch 215 are located between the two mounting notches 212 and are spaced apart from the two mounting notches 212. The opening of the slide hole 214 is located at the left side of the first fixing frame 21. The slide hole 214 is recessed from the left side surface of the first holder 21 to the right side surface (X-axis positive direction in the drawing), and penetrates the right side surface of the first holder 21. The sliding hole 214 includes two sub-sliding holes 216, and the two sub-sliding holes 216 are arranged at intervals along the Y-axis direction. It should be understood that the sub slide holes 216 are not limited to the illustrated square holes, but may be round holes, shaped holes, or the like.

In other embodiments, the sliding hole 214 may not penetrate the right side surface of the first fixing frame 21, and/or the sliding hole 214 may not include two sub-sliding holes 216, or the sliding hole 214 may include more than three sub-sliding holes 216, which is not particularly limited in the structure of the sliding hole 214 according to the embodiments of the present application.

The opening of the guide notch 215 is located on the top surface of the first fixing frame 21. The guide notch 215 is recessed from the top surface of the first fixing frame 21 toward the bottom surface, and penetrates the right side surface of the first fixing frame 21 and the bottom wall surface of the accommodating notch 211. The guiding notch 215 includes two groove side walls (not shown) that are disposed opposite to each other along the Y-axis direction. Each groove side wall is provided with an arc-shaped plate 217, and the arc-shaped plate 217 extends from the groove side wall toward the surface of the guide notch 215 toward the direction of the guide notch 215 (the Y-axis direction in the drawing) and is spaced from the other groove side wall. In other embodiments, the guiding notch 215 may not penetrate the right side surface of the first fixing frame 21, and/or the guiding notch 215 may not penetrate the bottom wall surface of the accommodating notch 211.

In this embodiment, there are two guide notches 215, and in the Y-axis direction, the two guide notches 215 are located at opposite sides of the slide hole 214, and are spaced from the slide hole 214. The two guide notches 215 are a front guide notch 215a and a rear guide notch 215b, respectively. In the Y-axis direction, a front guide notch 215a is located between the slide hole 214 and the front mounting notch 212a, and a rear guide notch 215b is located between the slide hole 214 and the rear mounting notch 212 b. Wherein, the arc plate 217 in the front guiding notch 215a extends along the positive direction of the Y axis, and the arc plate 217 in the rear guiding notch 215b extends along the negative direction of the Y axis. In other embodiments, the number of the guide notches 215 may be one, or the number of the guide notches 215 may be more than three, which is not particularly limited in the embodiments of the present application.

The first front main swing arm 23a includes a rotation portion 231a, a sliding portion 232a, and a connection portion 233a, and the connection portion 233a is fixedly connected between the rotation portion 231a and the sliding portion 232 a. Wherein, the rotation part 231a, the sliding part 232a and the connection part 233a may be integrally formed.

The structure of the rotating portion 231a is adapted to the structure of the front mounting notch 212 a. The rotating portion 231a may be sleeved on the first front rotating shaft 61a and may rotate relative to the first front rotating shaft 61a, so as to realize rotational connection between the rotating portion 231a and the first front rotating shaft 61a, thereby realizing rotational connection between the rotating portion 231a and the first fixing frame 21, and further realizing rotational connection between the first front main swing arm 23a and the first fixing frame 21. In other embodiments, the rotating portion 231a may also drive the first front rotating shaft 61a to rotate relative to the first fixing frame 21, so as to implement a rotational connection between the rotating portion 231a and the first fixing frame 21, and further implement a rotational connection between the first front main swing arm 23a and the first fixing frame 21.

The structure of the connecting portion 233a is adapted to the structure of the front avoidance notch 213 a. The connection portion 233a is provided with a relief hole 234a and a through hole 235a. The escape hole 234a is located in the middle (not shown) of the connection portion 233a, and penetrates the connection portion 233 in the thickness direction of the connection portion 233 a. Illustratively, the relief aperture 234a is a square aperture. In other embodiments, the relief aperture 234a may be a circular aperture or other shaped aperture. The through hole 235a penetrates the connection portion 233a in the Y-axis direction and penetrates the wall of the escape hole 234a to communicate with the escape hole 234a. Illustratively, the through-hole 235a is a circular hole, and the axis of the through-hole 235a is parallel to the Y-axis direction. In other embodiments, the through holes 235a may be square holes or other shaped holes.

Referring to fig. 7, the structure of the sliding portion 232a is matched with the structure of the first front mating groove 101 a. The sliding portion 232a has a substantially arc-shaped plate shape. That is, both the top surface (not shown) and the bottom surface (not shown) of the sliding portion 232a are arc-shaped surfaces. The sliding portion 232a is provided with a pin 236a, the pin 236a is disposed on a side of the sliding portion 232a away from the connecting portion 233a, and a diameter of the pin 236a is equal to a thickness of the sliding portion 232a. Illustratively, the pin 236a includes two sub-pins 237a, and the two sub-pins 237a are disposed on opposite sides of the sliding portion 232a in the Y-axis direction, respectively, and each extend in a direction away from the sliding portion 232a. The axes of the two sub-pins 237a are parallel to the Y-axis direction, and the two sub-pins 237a are coaxial. In other embodiments, the pin 236a may not include two sub pins 237a, in other words, the pin 236a may be a continuous pin, which is not particularly limited in the embodiments of the present application.

In addition, the sliding portion 232a is further provided with a relief notch 238a, and an opening of the relief notch 238a is located at an end surface of the sliding portion 232a away from the connecting portion 233 a. The escape notch 238a penetrates the sliding portion 232a in the thickness direction of the sliding portion 232a. In the Y-axis direction, the avoidance notch 238a is located between the two sub-pins 237a and is spaced apart from the two sub-pins 237 a.

The sliding portion 232a is mounted in the first front mating groove 101a, and is rotatable in the first front mating groove 101a relative to the base 10, so as to realize rotational connection between the sliding portion 232a and the base 10, and further realize rotational connection between the first front main swing arm 23a and the base 10. Wherein, the top surface of the sliding part 232a contacts with the groove top wall surface of the first front fitting groove 101a, and the bottom surface of the sliding part 232a contacts with the groove bottom wall surface of the first front fitting groove 101 a.

In the process of rotating the first front main swing arm 23a relative to the base 10, there are two cases in which the first front main swing arm 23a performs virtual axis rotation relative to the base 10 and the first front main swing arm 23a performs real axis rotation relative to the base 10. When the first front main swing arm 23a rotates about an imaginary axis with respect to the base 10, the sliding portion 232a can slide and rotate with respect to the base 10 in the first front mating groove 101a, and the pin 236a of the sliding portion 232a can slide between the flattened position and the switching position of the first front mating groove 101 a. In the virtual rotation stage, the rotation center of the first front main swing arm 23a relative to the base 10 is a first center, and the first center is the axis of the first front mating groove 101 a.

When the first front main swing arm 23a performs a real-axis rotation with respect to the base 10, the sliding portion 232a performs a real-axis rotation with respect to the base 10, and the sliding portion 232a can rotate with respect to the base 10 in the first front engagement groove 101a, and the pin 236a of the sliding portion 232a is always located at the switching position of the first front engagement groove 101 a. The rotation center of the first front main swing arm 23a relative to the base 10 is a second center, and the second center is the axis of the pin 236a of the sliding portion 232a and is spaced from the first center.

It should be noted that, the "switching position" defined in the embodiments of the present application refers to a position where the virtual axis rotation and the real axis rotation are switched, and similar descriptions will be understood in the following.

The first rear main swing arm 23b includes a rotation portion 231b, a sliding portion 232b, and a connection portion 233b, and the connection portion 233b is fixedly connected between the rotation portion 231b and the sliding portion 232 b. In this embodiment, the structure of the first rear main swing arm 23b, the matching relationship between the first rear main swing arm 23b and the first fixing frame 21, and the matching relationship between the first rear main swing arm 23b and the base 10 can be referred to the related description of the first front main swing arm 23 a.

The structure of the rotating portion 231b is adapted to the structure of the rear mounting notch 212 b. The rotating portion 231b may be sleeved on the first rear rotating shaft 61b and may rotate relative to the first rear rotating shaft 61b, so as to realize rotational connection between the rotating portion 231b and the first rear rotating shaft 61b, thereby realizing rotational connection between the rotating portion 231b and the first fixing frame 21, and further realizing rotational connection between the second rear main swing arm 24b and the first fixing frame 21.

The structure of the connecting portion 233b is adapted to the structure of the rear avoidance notch 213 b. Wherein the connection portion 233b is provided with a relief hole 234b and a through hole 235b. The structure of the sliding portion 232b is adapted to the structure of the first rear fitting groove 101 b. The sliding portion 232b is provided with a pin 236b, and two sub pins 237b of the pin 236b are respectively disposed on opposite sides of the sliding portion 232 b.

The first rear main swing arm 23b is different from the first front main swing arm 23a in that the sliding portion 232b is provided with two avoidance notches 238a, and the two avoidance notches 238a are arranged at intervals along the Y-axis direction. One escape notch 238a penetrates a front end surface (not shown) of the sliding portion 232b, and the other escape notch 238a penetrates a rear end surface (not shown) of the sliding portion 232 b.

The sliding portion 232b is mounted in the first rear mating groove 101b, and is rotatable in the first rear mating groove 101b relative to the base 10, so as to realize sliding and rotational connection between the sliding portion 232b and the base 10, and further realize sliding and rotational connection between the second rear main swing arm 24b and the base 10. Wherein, the top surface (not shown) of the sliding portion 232b contacts with the groove top wall surface of the first rear fitting groove 101b, and the bottom surface (not shown) of the sliding portion 232b contacts with the groove bottom wall surface of the first rear fitting groove 101 b.

In the process of rotating the first rear main swing arm 23b relative to the base 10, there are two cases in which the first rear main swing arm 23b performs virtual axis rotation relative to the base 10 and the first rear main swing arm 23b performs real axis rotation relative to the base 10. When the first rear main swing arm 23b rotates about an imaginary axis with respect to the base 10, the sliding portion 232b can slide and rotate with respect to the base 10 in the first rear mating groove 101b, and the pin 236b of the sliding portion 232b can slide between the flattened position and the switching position of the first rear mating groove 101 b. In the virtual rotation stage, the rotation center of the first rear main swing arm 23b relative to the base 10 is a first center, and the first center is the axis of the first rear mating groove 101 b.

When the first rear main swing arm 23b performs a real-axis rotation with respect to the base 10, the sliding portion 232b performs a real-axis rotation with respect to the base 10, and the sliding portion 232b can rotate with respect to the base 10 in the first rear engagement groove 101b, and the pin 236b of the sliding portion 232b is always located at the switching position of the first rear engagement groove 101 b. The rotation center of the first rear main swing arm 23b relative to the base 10 is a second center, and the second center is the axis of the pin 236b of the sliding portion 232b and is spaced from the first center.

The second holder 22 extends in the Y-axis direction. The second fixing frame 22 is provided with a receiving notch 221, a mounting notch 222, a avoiding notch 223, a sliding hole 224 and a guiding notch 225. In this embodiment, the structures of the accommodating notch 221, the mounting notch 222, the avoiding notch 223, the sliding hole 224 and the guiding notch 225 may refer to the relevant descriptions of the accommodating notch 211, the mounting notch 212, the avoiding notch 213, the sliding hole 214 and the guiding notch 215 in the first fixing frame 21, and are not described herein. The accommodating notch 221 further penetrates through a right side surface (not shown) of the second fixing frame 22, the mounting notch 222 further penetrates through a left side surface (not shown) of the second fixing frame 22, the avoiding notch 213 further penetrates through a right side surface of the second fixing frame 22, and the guiding notch 225 further penetrates through a left side surface of the second fixing frame 22.

In addition, the connecting assembly 20 further includes two second rotating shafts 62, wherein the structure of the second rotating shafts 62 and the matching relationship between the second rotating shafts 62 and the second fixing frame 22 can refer to the structure of the first rotating shaft 61 and the related description of the matching relationship between the first rotating shaft 61 and the first fixing frame 21, which are not described herein.

The second front main swing arm 24a includes a rotating portion 241a, a sliding portion 242a, and a connecting portion 243a, the connecting portion 243a being fixedly connected between the rotating portion 241a and the sliding portion 242 a. In the present embodiment, the structure of the second front main swing arm 24a and the matching relationship between the second front main swing arm 24a and the second fixing frame 22 and the base 10 can be described with reference to the first rear main swing arm 23 b.

The structure of the rotating portion 241a is adapted to the structure of the front mounting notch 222 a. The rotating portion 241a may be sleeved on the second front rotating shaft 62a, and may rotate relative to the second front rotating shaft 62a, so as to realize rotational connection between the rotating portion 241a and the second front rotating shaft 62a, thereby realizing rotational connection between the rotating portion 241a and the second fixing frame 22, and further realizing rotational connection between the second main swing arm 24 and the second fixing frame 22.

The structure of the connecting portion 243a is adapted to the structure of the front avoidance notch 223 a. The connection portion 243a is provided with a relief hole 244a and a through hole 245a. The sliding portion 242a is configured to be matched with the structure of the second front fitting groove 102 a. Wherein, the sliding portion 242a is provided with a pin 246a, and two sub pins 247a of the pin 246a are respectively arranged at two opposite sides of the sliding portion 242 b. The sliding portion 242a is further provided with two escape notches 248a.

The sliding portion 242a is mounted in the second front mating groove 102, and is rotatable in the second front mating groove 102a relative to the base 10, so as to realize rotational connection between the sliding portion 242a and the base 10, and further realize rotational connection between the second front main swing arm 24a and the base 10. Wherein, the top surface (not shown) of the sliding portion 242a contacts with the top wall surface of the second front mating groove 102a, and the bottom surface (not shown) of the sliding portion 242a contacts with the bottom wall surface of the second front mating groove 102 a.

In the process of rotating the second front main swing arm 24a relative to the base 10, there are two cases in which the second front main swing arm 24a performs virtual axis rotation relative to the base 10 and the second front main swing arm 24a performs real axis rotation relative to the base 10. When the second front main swing arm 24a rotates about the virtual axis relative to the base 10, the sliding portion 242a can slide and rotate in the second front mating groove 102a relative to the base 10, and the pin 246a of the sliding portion 242a can slide between the flattened position and the switching position of the second front mating groove 102 a. In the virtual rotation stage, the rotation center of the second front main swing arm 24a relative to the base 10 is a third center, and the third center is the axis of the second front mating groove 102 a.

When the second front main swing arm 24a performs a real-axis rotation with respect to the base 10, the sliding portion 242a performs a real-axis rotation with respect to the base 10, and the sliding portion 242a can rotate with respect to the base 10 in the second front engagement groove 102a, and the pin 246a of the sliding portion 242a is always located at the switching position of the second front engagement groove 102 a. The rotation center of the second front main swing arm 24a relative to the base 10 is a fourth center, which is the axial center of the pin 246a of the sliding portion 242a and is spaced from the third center.

The second rear main swing arm 24b includes a rotating portion 241b, a sliding portion 242b, and a connecting portion 243b, the connecting portion 243b being fixedly connected between the rotating portion 241b and the sliding portion 242 b. In this embodiment, the structure of the second rear main swing arm 24b, the matching relationship between the second rear main swing arm 24b and the second fixing frame 22, and the matching relationship between the second rear main swing arm 24b and the base 10 can be referred to the related description of the first front main swing arm 23 a.

The structure of the rotating portion 241b is adapted to the structure of the rear mounting notch 222 b. The rotating portion 241b may be sleeved on the second rear rotating shaft 62b and may rotate relative to the second rear rotating shaft 62b, so as to realize rotational connection between the rotating portion 241b and the second rear rotating shaft 62b, thereby realizing rotational connection between the rotating portion 241b and the second fixing frame 22, and further realizing rotational connection between the second rear main swing arm 24b and the second fixing frame 22.

The structure of the connecting portion 243b is adapted to the structure of the rear avoidance gap 223 b. The connection portion 243b is provided with a relief hole 244b and a through hole 245b. The sliding portion 242b is configured to be compatible with the structure of the second rear mating groove 102 b. Wherein, the sliding portion 242b is provided with a pin 246b, and two sub pins 247b of the pin 246b are respectively arranged at two opposite sides of the sliding portion 242 b. The sliding portion 242b is further provided with a relief notch 248b.

The sliding portion 242b is mounted in the second rear mating groove 102b and is rotatable in the second rear mating groove 102b relative to the base 10 to achieve a rotational connection between the sliding portion 242b and the base 10, thereby achieving a sliding and rotational connection between the second rear main swing arm 24b and the base 10. Wherein, the top surface (not shown) of the sliding portion 242b contacts with the groove top wall surface of the second rear mating groove 102b, and the bottom surface (not shown) of the sliding portion 242b contacts with the groove bottom wall surface of the second rear mating groove 102 b.

In the process of rotating the second rear main swing arm 24b relative to the base 10, there are two cases in which the second rear main swing arm 24b performs virtual axis rotation relative to the base 10 and the second rear main swing arm 24b performs real axis rotation relative to the base 10. When the second rear main swing arm 24b rotates about the virtual axis relative to the base 10, the sliding portion 242b can slide and rotate in the second rear mating groove 102b relative to the base 10, and the pin 246b of the sliding portion 242b can slide between the flattened position and the switching position of the second rear mating groove 102 b. In the virtual rotation stage, the rotation center of the second rear main swing arm 24b relative to the base 10 is a third center, and the third center is the axis of the second rear mating groove 102 b.

When the second rear main swing arm 24b performs a real-axis rotation with respect to the base 10, the sliding portion 242b performs a real-axis rotation with respect to the base 10, and the sliding portion 242b can rotate with respect to the base 10 in the second rear engagement groove 102b, and the pin 246b of the sliding portion 242b is always located at the switching position of the second rear engagement groove 102 b. The rotation center of the second rear main swing arm 24b with respect to the base 10 is a fourth center, which is the axial center of the pin 246b of the sliding portion 242b and is spaced from the third center.

In the connecting assembly 20 of the present embodiment, when the first fixing frame 21 rotates relative to the base 10, the first fixing frame 21 drives the first front main swing arm 23a and the first rear main swing arm 23b to rotate not only relative to the first fixing frame 21 but also relative to the base 10, and when the second fixing frame 22 rotates relative to the base 10, the second fixing frame 22 drives the second front main swing arm 24a and the second rear main swing arm 24b to rotate not only relative to the second fixing frame 22 but also relative to the base 10.

In addition, the connection assembly 20 further includes two first pins 71 and two second pins 72. The two first pins 71 are a first front pin 71a and a first rear pin 71b, respectively. The first front pin 71a is inserted through the through hole 235a of the connecting portion 233a in the first front main swing arm 23a, and both ends of the first front pin 71a are fixedly connected to the wall of the through hole 235 a. The first rear pin 71b is inserted through the through hole 235b of the connecting portion 233b in the first rear main swing arm 23b, and both end portions of the first rear pin 71b are fixedly connected to the wall of the through hole 235 b. The axes of the first front pin 71a and the first rear pin 71b are parallel to the Y-axis direction, and the axes of the first front pin 71a and the first rear pin 71b are coaxial.

The two second pins 72 are a second front pin 72a and a second rear pin 72b, respectively. The second front pin shaft 72a is inserted through the through hole 245a of the connecting portion 243a in the second front main swing arm 24a, and both end portions of the second front pin shaft 72a are fixedly connected to the hole wall of the through hole 245 a. The second rear pin shaft 72b is inserted through the through hole 245b of the connecting portion 243b in the second rear main swing arm 24b, and both end portions of the second rear pin shaft 72b are fixedly connected to the hole wall of the through hole 245 b. Wherein, the axes of the second front pin 72a and the second rear pin 72b are parallel to the Y-axis direction, and the axes of the second front pin 72a and the second rear pin 72b are coaxial.

It should be noted that, in the foldable mechanism 130 shown in the present application, the matching relationship between the two first main swing arms 23 and the first fixing frame 21, the matching relationship between the two first main swing arms 23 and the base 10, and the matching relationship between the two first main swing arms 23 and the two second main swing arms 24 are the same, the matching relationship between the two second main swing arms 24 and the second fixing frame 22, the movement relationship between the two second main swing arms 24 and the base 10, and the matching relationship between the two second main swing arms 24 and the two first main swing arms 23 are the same. Next, the fitting relationship between the connection assembly 20 and the base 10 will be described taking the first front main swing arm 23a and the second front main swing arm 24a as an example.

Referring to fig. 5 and 11, fig. 11 is a schematic cross-sectional view of the foldable mechanism 130 shown in fig. 5 taken along the line I-I. The term "cut along the plane I-I" means a cut along the plane I-I, and similar descriptions will be understood in the following.

When the foldable mechanism 130 is in the flattened state, the connecting assembly 20 is in the flattened state, the first fixing frame 21 and the second fixing frame 22 are respectively located on two opposite sides of the base 10, the top surface of the first fixing frame 21 and the top surface of the second fixing frame 22 are flush, and the first front main swing arm 23a and the second front main swing arm 24a are relatively flattened. In the first front main swing arm 23a, the top surface of the sliding portion 232a is attached to the groove top wall surface of the first front fitting groove 101a, the bottom surface of the sliding portion 232a is attached to the groove bottom wall surface of the first front fitting groove 101a, and the pin shaft 236a of the sliding portion 232a is located at the flattened position of the first front fitting groove 101 a. In the second front main swing arm 24a, the top surface of the sliding portion 242a is attached to the groove top wall surface of the second front fitting groove 102a, the bottom surface of the sliding portion 242a is attached to the groove bottom wall surface of the second front fitting groove 102a, and the pin 246a of the sliding portion 242a is located at the flattened position of the second front fitting groove 102.

The portion of the sliding portion 232a of the first front main swing arm 23a away from the connection portion 233 is disposed through the front avoidance hole 103a, the portion of the sliding portion 242a of the second front main swing arm 24a away from the connection portion 243a is disposed through the front avoidance hole 103a, the avoidance notch 238a of the sliding portion 232a of the first front main swing arm 23a is avoided from the sliding portion 242a of the second front main swing arm 24a, and the two avoidance notches 248a of the sliding portion 242a of the second front main swing arm 24a are avoided from the sliding portion 232a of the first front main swing arm 23 a. In addition, the front avoidance notch 213a of the first fixing frame 21 is avoided from the connection portion 233a of the first front main swing arm 23a, and the front avoidance notch 223a of the second fixing frame 22 is avoided from the connection portion 243a of the second front main swing arm 24 a.

Referring to fig. 12 and 13, fig. 12 is a schematic structural view of the foldable mechanism 130 shown in fig. 11 in a folded state, and fig. 13 is a schematic structural view of the foldable mechanism 130 shown in fig. 5 in a folded state after being cut along a section II-II.

When the foldable mechanism 130 is in the folded state, the connecting assembly 20 is in the folded state, the first fixing frame 21 and the second fixing frame 22 are spaced and oppositely arranged, and the first front main swing arm 23a and the second front main swing arm 24a are spaced and oppositely arranged. The pin 236a of the sliding portion 232a in the first front main swing arm 23a is located at the switching position of the first front mating groove 101a, and the pin 246a of the sliding portion 242a in the second front main swing arm 24a is located at the switching position of the second front mating groove 102 a. The first front avoidance groove 104a avoids the part of the sliding part 232a in the first front main swing arm 23a away from the connecting part 233a, and the second front avoidance groove 105a avoids the part of the sliding part 242a in the second front main swing arm 24a away from the connecting part 243a, so that when the first front main swing arm 23a and the second front main swing arm 24a rotate relative to the base 10, interference between the first front main swing arm 23a and the second front main swing arm 24a and the base 10 is avoided, smoothness of rotation of the first front main swing arm 23a and the second front main swing arm 24a relative to the base 10 is ensured, movement smoothness of the foldable mechanism 130 is improved, comfort of a user using the foldable terminal 1000 is improved, and a stopping effect is achieved, so that the first front main swing arm 23a and the second front main swing arm 24a keep a folded state relative to the base 10.

At this time, the sliding portion 232a of the first front main swing arm 23a and the sliding portion 242a of the second front main swing arm 24a are both located between the left and right side surfaces of the base 10. In other words, the sliding portion 232a of the first front main swing arm 23a and the sliding portion 242a of the second front main swing arm 24a do not protrude from the side surface of the base 10, and the sliding portion 232a of the first front main swing arm 23a and the sliding portion 242a of the second front main swing arm 24a completely reuse the thickness space of the base 10, reducing the thickness of the foldable mechanism 130 in the folded state, and contributing to the light and thin design of the foldable terminal 1000.

Referring to fig. 14, fig. 14 is a schematic view of the foldable mechanism 130 shown in fig. 11 in a semi-folded state.

Wherein, the connecting assembly 20 is in a semi-folded state, the pin 236a of the sliding portion 232a in the first front main swing arm 23a is located at the switching position of the first front mating slot 101a, and the pin 246a of the sliding portion 242a in the second front main swing arm 24a is located at the switching position of the second front mating slot 102 a.

It should be noted that, in the process of switching the foldable mechanism 130 between the unfolded state and the folded state in the embodiment of the present application, for example, the process of switching the foldable mechanism 130 from the unfolded state to the folded state and from the folded state to the unfolded state includes a virtual axis rotation stage and a real axis rotation stage. In the virtual axis rotation stage, the first front main swing arm 23a and the second front main swing arm 24a each perform virtual axis rotation of the base 10. In the real-axis rotation stage, the first front main swing arm 23a and the second front main swing arm 24a each perform real-axis rotation of the base 10.

In the present embodiment, during the process of switching the foldable mechanism 130 from the flattened state to the folded state, the virtual axis rotation stage is performed first, and then the real axis rotation stage is performed.

As shown in fig. 11 and 14, in the virtual axis rotation stage, the first fixing frame 21 rotates around the counterclockwise direction relative to the base 10, the first fixing frame 21 drives the first front main swing arm 23a to slide and rotate relative to the base 10, and the pin 236a of the sliding portion 232a in the first front main swing arm 23a slides from the flattened position of the first front mating slot 101a to the switching position. The second fixing frame 22 rotates clockwise relative to the base 10, the second fixing frame 22 drives the second front main swing arm 24a to slide and rotate relative to the base 10, and the pin shaft 246a of the sliding portion 242a in the second front main swing arm 24a slides from the flattened position of the second front matching groove 102a to the switching position.

As shown in fig. 12 and 14, in the real-axis rotation stage, the first fixing frame 21 continues to rotate around the counterclockwise direction relative to the base 10, and the first fixing frame 21 drives the first front main swing arm 23a to rotate relative to the base 10, and the pin 236a of the sliding portion 232a in the first front main swing arm 23a is always located at the switching position of the first front mating slot 101 a. The second fixing frame 22 continues to rotate clockwise relative to the base 10, the second fixing frame 22 drives the second front main swing arm 24a to rotate relative to the base 10, and the pin 246a of the sliding part 242a in the second front main swing arm 24a is always located at the switching position of the second front matching groove 102 a.

In contrast, in the process of switching the foldable mechanism 130 from the folded state to the flattened state, the real axis rotation stage is performed first, and then the imaginary axis rotation stage is performed.

As shown in fig. 12 and 14, in the real-axis rotation stage, the first fixing frame 21 rotates clockwise relative to the base 10, the first fixing frame 21 drives the first front main swing arm 23a to rotate relative to the base 10, and the pin 236a of the sliding portion 232a in the first front main swing arm 23a is always located at the switching position of the first front mating slot 101 a. The second fixing frame 22 rotates around the counterclockwise direction relative to the base 10, the second fixing frame 22 drives the second front main swing arm 24a to rotate relative to the base 10, and the pin 246a of the sliding part 242a in the second front main swing arm 24a is always located at the switching position of the second front matching groove 102 a.

As shown in fig. 11 and 13, in the virtual axis rotation stage, the first fixing frame 21 continues to rotate clockwise relative to the base 10, and the first fixing frame 21 drives the first front main swing arm 23a to slide and rotate relative to the base 10, and the pin 236a of the sliding portion 232a in the first front main swing arm 23a slides from the switching position of the first front mating slot 101a to the flattening position. The second fixing frame 22 continues to rotate around the counterclockwise direction relative to the base 10, the second fixing frame 22 drives the second front main swing arm 24a to slide and rotate relative to the base 10, and the pin 246a of the sliding portion 242a in the second front main swing arm 24a slides from the switching position of the second front matching groove 102a to the flattening position.

In the process of switching between the folded state and the unfolded state of the foldable mechanism 130 according to the present application, when the first front main swing arm 23a and the second front main swing arm 24a rotate relative to the base 10, there are two cases of real axis rotation and imaginary axis rotation, and the rotation centers of the first front main swing arm 23a and the second front main swing arm 24a relative to the base 10 are different in the two cases. In other words, the motion track of the first front main swing arm 23a and the second front main swing arm 24a during the state switching process are changed, and correspondingly, the motion track of the first fixing frame 21 and the second fixing frame 22 during the state switching process are changed, so that the rotation centers of the real axis rotation stage and the virtual axis rotation stage can be purposefully designed respectively, the degree of freedom of the design of the foldable mechanism 130 during the state switching process is improved, the stress state of the display screen 200 during the state switching process of the foldable terminal 1000 is improved, and the problems of crease, invert and the like, which are easily generated by the display screen 200, are solved.

Referring to fig. 8 to 10, two sub-sliding portions 325 of the sliding portion 322 in the first damping swing arm 32 are respectively inserted into two sub-sliding holes 216 of the sliding hole 214 in the first fixing frame 21, and can slide in the sub-sliding holes 216 relative to the first fixing frame 21, so as to realize sliding connection between the sliding portion 322 and the first fixing frame 21, and further realize sliding and rotating connection between the first damping swing arm 32 and the first fixing frame 21.

The two sub-sliding portions 335 of the sliding portion 332 in the second damping swing arm 33 are respectively inserted into the two sub-sliding holes 226 of the sliding hole 224 in the second fixing frame 22, and can slide in the sub-sliding holes 226 relative to the second fixing frame 22, so as to realize sliding connection between the sliding portion 332 and the second fixing frame 22, and further realize sliding connection between the second damping swing arm 33 and the second fixing frame 22.

When the first fixing frame 21 rotates relative to the base 10, the first fixing frame 21 drives the first damping swing arm 32 to slide relative to the first fixing frame 21 and also rotate relative to the base 10. At this time, the synchronization assembly 50 can drive the second damping swing arm 33 to rotate relative to the base 10, the second damping swing arm 33 slides relative to the second fixing frame 22, and drives the second fixing frame 22 to rotate relative to the base 10, so as to realize synchronous rotation of the first fixing frame 21 and the second fixing frame 22 relative to the base 10.

Similarly, when the second fixing frame 22 rotates relative to the base 10, the second fixing frame 22 drives the second damping swing arm 33 to slide relative to the second fixing frame 22 and also rotate relative to the base 10. At this time, the synchronization assembly 50 can drive the first damping swing arm 32 to rotate relative to the base 10, the first damping swing arm 32 slides relative to the first fixing frame 21, and drives the first fixing frame 21 to rotate relative to the base 10, so as to realize synchronous rotation of the first fixing frame 21 and the second fixing frame 22 relative to the base 10.

Therefore, when the connection assembly 20 is switched between the folded state and the flattened state, the first fixing frame 21 and the second fixing frame 22 rotate relative to the base 10, and the first fixing frame 21 and the second fixing frame 22 can respectively drive the first damping swing arm 32 and the second damping swing arm 33 to rotate relative to the base 10, so that the first damping swing arm 32 and the second damping swing arm 33 can rotate relatively, and further the damping assembly 30 is switched between the folded state and the flattened state.

Referring to fig. 15 and 16, fig. 15 is a schematic structural view of the platen assembly 40 in the foldable mechanism 130 shown in fig. 6, and fig. 16 is a schematic structural view of the platen assembly 40 shown in fig. 15 at another angle.

The first pressing plate 41 includes a supporting portion 411, a sliding portion 412, and a guiding portion 413, and both the sliding portion 412 and the guiding portion 413 are fixedly connected to the supporting portion 411. Wherein, the supporting portion 411, the sliding portion 412 and the guiding portion 413 may be integrally formed, so as to improve the structural strength of the first pressing plate 41 and ensure the structural stability of the first pressing plate 41. In other embodiments, the first pressing plate 41 may be an integral structure formed by assembling, for example, the sliding portion 412 may be fixedly connected to the supporting portion 411 by welding or bonding, and/or the guiding portion 413 may be fixedly connected to the supporting portion 411 by welding or bonding, etc.

The support portion 411 has a substantially elongated plate shape and extends in the Y-axis direction. The supporting portion 411 is provided with a sliding notch 414, and an opening of the sliding notch 414 is located on a left side surface (not shown) of the supporting portion 411. The slide notch 414 is recessed from the left side surface to the right side surface (not shown) of the support portion 411 (X-axis positive direction shown), and penetrates the top surface (not shown) and the bottom surface (not shown) of the support portion 411. Illustratively, there are two slide notches 414, and the two slide notches 414 are a front slide notch 414a and a rear slide notch 414b, respectively, and the front slide notch 414a and the rear slide notch 414b are arranged at intervals along the Y-axis direction. The front sliding notch 414a is located at a front end portion (not shown) of the supporting portion 411, and the rear sliding notch 414b is located at a rear end portion (not shown) of the supporting portion 411. In other embodiments, there may be only one sliding notch 414, or there may be more than three sliding notches 414, and the number of sliding notches 414 is not particularly limited in the embodiments of the present application.

The sliding portion 412 is fixedly connected to a bottom wall (not shown) of the sliding notch 414, and is spaced apart from a side wall (not shown) of the sliding notch 414. The sliding portion 412 is provided with a sliding hole 415, and the sliding hole 415 penetrates the sliding portion 412 along the Y-axis direction and communicates with the sliding notch 414. The sliding hole 415 is a strip-shaped hole, and an included angle between the length direction of the sliding hole 415 and the positive direction of the X-axis is an obtuse angle. Further, the slide hole 415 has a folded position and a flattened position, the folded position of the slide hole 415 being located inside the flattened position of the slide hole 415. Illustratively, the folded position of the slide hole 415 is located at an innermost side of the slide hole 415, and the flattened position of the slide hole 415 is located at an outermost side of the slide hole 415.

In this embodiment, there are two sliding portions 412, and each sliding portion 412 is fixedly connected to a bottom wall of a slot of the sliding notch 414. Wherein the two sliding portions 412 are a front sliding portion 412a and a rear sliding portion 412b, respectively. The front sliding portion 412a is fixedly connected to the bottom wall of the groove of the front sliding notch 414a, and the sliding hole 415 of the front sliding portion 412a communicates with the front sliding notch 414 a. The rear sliding portion 412b is fixedly connected to the bottom wall of the rear sliding notch 414b, and the sliding hole 415 of the rear sliding portion 412b communicates with the rear sliding notch 414 b.

The guiding portion 413 is fixedly connected to the middle portion of the supporting portion 411, and is located between the front sliding notch 414a and the rear sliding notch 414b, and is spaced apart from the front sliding notch 414a and the rear sliding notch 414 b. Specifically, the guide portion 413 is fixedly connected to the bottom surface of the supporting portion 411, and extends from the bottom surface of the supporting portion 411 in a direction away from the top surface (negative direction of the Z axis in the drawing). The guiding portions 413 are provided with guiding grooves 416, and the guiding grooves 416 are arc-shaped grooves. Wherein, the structure of the guiding groove 416 is adapted to the structure of the arc plate 217 (as shown in fig. 9 and 10) of the first fixing frame 21.

In this embodiment, there are two guide portions 413, and the two guide portions 413 are arranged at intervals along the Y-axis direction. The two guide portions 413 are a front guide portion 413a and a rear guide portion 413b, respectively. The front guide portion 413a is adjacent to the front slide notch 414a, and an opening of the guide groove 416 in the front guide portion 413a is located at a rear end face (not shown) of the front guide portion 413 a. The rear guide portion 413b is adjacent to the rear slide notch 414b, and an opening of the guide groove 416 in the rear guide portion 413b is located at a front end surface (not shown) of the rear guide portion 413b. Wherein, along the Y-axis direction, the opening of the guide groove 416 in the front guide portion 413a and the opening of the guide groove 416 in the rear guide portion 413b are disposed opposite to each other.

The second pressing plate 42 includes a supporting portion 421, a sliding portion 422, and a guiding portion 423, and the sliding portion 422 and the guiding portion 423 are fixedly connected to the supporting portion 421. In this embodiment, the structure of the second pressing plate 42 can be referred to the related description of the first pressing plate 41, which is not repeated here.

Specifically, the front sliding portion 422a is fixedly connected to the bottom wall of the slot of the front sliding notch 424a, and the sliding hole 425 of the front sliding portion 422a communicates with the front sliding notch 424 a. The rear sliding portion 422b is fixedly connected to the bottom wall of the rear sliding notch 424b, and the sliding hole 425 of the rear sliding portion 422b communicates with the rear sliding notch 424 b. The front guide portion 423a is adjacent to the front slide notch 424a, and an opening of the guide groove 426 of the front guide portion 423a is located at a rear end surface (not shown) of the front guide portion 423 a. The rear guide portion 423b is adjacent to the rear slide notch 424b, and an opening of the guide groove 426 of the rear guide portion 423b is located at a front end surface (not shown) of the rear guide portion 423 b. Wherein, along the Y-axis direction, the opening of the guide groove 426 in the front guide portion 423a and the opening of the guide groove 426 in the rear guide portion 423b are disposed opposite to each other.

Referring to fig. 9, 10, 14 and 15, in the first pressing plate 41, the supporting portion 411 may be accommodated in the accommodating notch 211 of the first fixing frame 21, the front sliding notch 414a of the supporting portion 411 is retracted from the connecting portion 233a of the first front main swing arm 23a, the rear sliding notch 414b of the supporting portion 411 is retracted from the connecting portion 233b of the first rear main swing arm 23b, the front sliding portion 412a is mounted in the retracted hole 234a of the connecting portion 233a in the first front main swing arm 23a, the rear sliding portion 412b is mounted in the retracted hole 234b of the connecting portion 233b in the first rear main swing arm 23b, the front guiding portion 413a is mounted in the front guiding notch 215a of the first fixing frame 21, and the rear guiding portion 413b is mounted in the rear guiding notch 215b of the first fixing frame 21.

The first front pin 71a is further disposed through the sliding hole 415 of the front sliding portion 412a in the first pressing plate 41, and is driven by the connecting portion 233a of the first front main swing arm 23a to slide and rotate in the sliding hole 415 of the front sliding portion 412a relative to the front sliding portion 412a, so as to realize sliding and rotating connection between the connecting portion 233a of the first front main swing arm 23a and the front sliding portion 412a of the first pressing plate 41, thereby realizing sliding and rotating connection between the first front main swing arm 23a and the first pressing plate 41. The first rear pin 71b is further disposed through the sliding hole 415 of the rear sliding portion 412b in the first pressing plate 41, and can slide and rotate relative to the rear sliding portion 412b in the sliding hole 415 of the rear sliding portion 412b under the driving of the connecting portion 233b of the first rear main swing arm 23b, so as to realize sliding and rotating connection between the connecting portion 233b of the first rear main swing arm 23b and the rear sliding portion 412b of the first pressing plate 41, thereby realizing sliding and rotating connection between the first rear swing arm 23b and the first pressing plate 41.

In addition, the arc plate 217 in the front guiding notch 215a is mounted in the guiding groove 416 of the front guiding portion 413a, and can slide and rotate in the guiding groove 416 of the front guiding portion 413a relative to the first pressing plate 41, the arc plate 217 in the rear guiding notch 215b is mounted in the guiding groove 416 of the rear guiding portion 413b, and can slide and rotate in the guiding groove 416 of the rear guiding portion 413b relative to the first pressing plate 41, so as to realize sliding and rotating connection between the first fixing frame 21 and the front guiding portion 413a and the rear guiding portion 413b, and further realize sliding and rotating connection between the first fixing frame 21 and the first pressing plate 41, so as to improve assembly stability between the first pressing plate 41 and the connecting assembly 20.

In the second pressing plate 42, the supporting portion 421 may be accommodated in the accommodating notch 221 of the second fixing frame 22, the front sliding notch 424a of the supporting portion 421 is retracted into the connecting portion 233a of the second front main swing arm 24a, the rear sliding notch 424b of the supporting portion 421 is retracted into the connecting portion 233b of the second rear main swing arm 24b, the front sliding portion 422a is mounted in the retracted hole 234a of the connecting portion 233a in the second front main swing arm 24a, the rear sliding portion 422b is mounted in the retracted hole 234b of the connecting portion 233b in the second rear main swing arm 24b, the front guiding portion 423a is mounted in the front guiding notch 225a of the second fixing frame 22, and the rear guiding portion 423b is mounted in the rear guiding notch 225b of the second fixing frame 22.

The second front pin shaft 72a is further disposed through the sliding hole 425 of the front sliding portion 422a in the second pressing plate 42, and can slide and rotate in the sliding hole 425 of the front sliding portion 422a relative to the front sliding portion 422a under the driving of the connecting portion 233a in the second front main swinging arm 24a, so as to realize sliding and rotating connection between the connecting portion 243a of the second front main swinging arm 24a and the front sliding portion 422a of the second pressing plate 42, thereby realizing sliding and rotating connection between the second pressing plate 42 and the second front main swinging arm 24 a. The second rear pin shaft 72b further penetrates through the sliding hole 425 of the rear sliding portion 422b in the second pressing plate 42, and can slide and rotate relative to the rear sliding portion 422b in the sliding hole 425 of the rear sliding portion 422b under the driving of the connecting portion 243b of the second rear main swinging arm 24b, so as to realize sliding and rotating connection between the connecting portion 243b of the second rear main swinging arm 24b and the rear sliding portion 422b of the second pressing plate 42, and further realize sliding and rotating connection between the second rear main swinging arm 24b and the second pressing plate 42.

In addition, the arc plate 227 in the front guiding notch 225a is mounted in the guiding groove 426 of the front guiding portion 423a, and can slide and rotate in the guiding groove 426 of the front guiding portion 423a relative to the second pressing plate 42, and the arc plate 227 in the rear guiding notch 225b is mounted in the guiding groove 426 of the rear guiding portion 423b, and can slide and rotate in the guiding groove 426 of the rear guiding portion 423b relative to the second pressing plate 42, so as to realize the sliding and rotating connection between the second fixing frame 22 and the front guiding portion 423a and the rear guiding portion 423b, and further realize the sliding and rotating connection between the second fixing frame 22 and the second pressing plate 42, so as to improve the assembly stability between the second pressing plate 42 and the connecting assembly 20.

When the first fixing frame 21 rotates relative to the base 10, the first fixing frame 21 drives the first pressing plate 41 to slide and rotate relative to the first fixing frame 21, the first fixing frame 21 also drives the first front main swing arm 23a and the first rear main swing arm 23b to rotate relative to the first fixing frame 21, the first front main swing arm 23a drives the first front pin 71a to slide and rotate relative to the first pressing plate 41, and the first rear main swing arm 23b drives the first rear pin 71b to slide and rotate relative to the first pressing plate 41, so as to drive the first pressing plate 41 to rotate relative to the base 10.

Similarly, when the second fixing frame 22 rotates relative to the base 10, the second fixing frame 22 drives the second pressing plate 42 to slide and rotate relative to the second fixing frame 22, the second fixing frame 22 also drives the second front main swing arm 24a and the second rear main swing arm 24b to rotate relative to the second fixing frame 22, the second front main swing arm 24a drives the second front pin shaft 72a to slide and rotate relative to the second pressing plate 42, and the second rear main swing arm 24b drives the second rear pin shaft 72b to slide and rotate relative to the second pressing plate 42, so as to drive the second pressing plate 42 to rotate relative to the base 10.

Therefore, when the connection assembly 20 is switched between the folded state and the flattened state, the first fixing frame 21 and the second fixing frame 22 rotate relative to the base 10, and the first fixing frame 21 and the second fixing frame 22 can respectively drive the first pressing plate 41 and the second pressing plate 42 to rotate relative to the base 10, so that the first pressing plate 41 and the second pressing plate 42 can rotate relatively, and further the mutual switching of the pressing plate assembly 40 between the folded state and the flattened state is realized.

Referring to fig. 11, when the foldable mechanism 130 is in the flattened state, the platen assembly 40 is in the flattened state, the first platen 41 and the second platen 42 are respectively located on opposite sides of the base 10 and are flattened relatively, the first front pin 71a is located at the flattened position of the sliding hole 415 in the front sliding portion 412a, the first rear pin 71b is located at the flattened position of the sliding hole 415 in the rear sliding portion 412b, the second front pin 44a is located at the flattened position of the sliding hole 425 in the front sliding portion 422a, and the second rear pin 72b is located at the flattened position of the sliding hole 425 in the rear sliding portion 422 b. Wherein the top surface of the first pressing plate 41 (i.e., the top surface of the supporting portion 411) and the top surface of the second pressing plate 42 (i.e., the top surface of the supporting portion 421) are flush. At this time, the top surface of the first pressing plate 41 is flush with the top surface of the first fixing frame 21, the top surface of the second pressing plate 42 is flush with the top surface of the second fixing frame 22, and the top surface of the base 10, the top surface of the first fixing frame 21, the top surface of the second fixing frame 22, the top surface of the first pressing plate 41, and the top surface of the second pressing plate 42 together form a supporting surface 1302.

Referring to fig. 12 and 13 together, when the foldable mechanism 130 is in the folded state, the platen assembly 40 is in the folded state, the first platen 41 and the second platen 42 are folded relatively, the first front pin 71a is located at the folded position of the sliding hole 415 in the front sliding portion 412a, the first rear pin 71b is located at the folded position of the sliding hole 415 in the rear sliding portion 412b, the second front pin 44a is located at the folded position of the sliding hole 425 in the front sliding portion 422a, and the second rear pin 72b is located at the folded position of the sliding hole 425 in the rear sliding portion 422 b. At this time, the base 10, the connection assembly 20, the damping assembly 30, and the pressing plate assembly 40 enclose to form the escape space 1303. The cross section of the avoiding space 1303 is in a shape of a droplet.

During the folding process, for example, during the process that the folding mechanism 130 is switched from the flattened state to the folded state, the pressing plate assembly 40 is switched from the flattened state to the folded state, the first fixing frame 21 drives the first pressing plate 41 to rotate relative to the base 10, the first front pin 71a slides from the flattened position to the folded position at the sliding hole 415 of the front sliding portion 412a, the first rear pin 71b slides from the flattened position to the folded position at the sliding hole 415 of the rear sliding portion 412b, the second fixing frame 22 drives the second pressing plate 42 to rotate relative to the base 10, the second front pin 72a slides from the flattened position to the folded position at the sliding hole 425 of the front sliding portion 422a, and the second rear pin 72b slides from the flattened position to the folded position at the sliding hole 425 of the rear sliding portion 422 b.

Similarly, during the unfolding process of the foldable mechanism 130, for example, during the process of switching the foldable mechanism 130 from the folded state to the flattened state, the platen assembly 40 is switched from the folded state to the flattened state, the first fixing frame 21 drives the first platen 41 to rotate relative to the base 10, the first front pin 71a slides from the folded position to the flattened position at the sliding hole 415 of the front sliding portion 412a, the first rear pin 71b slides from the folded position to the flattened position at the sliding hole 415 of the rear sliding portion 412b, the second fixing frame 22 drives the second platen 42 to rotate relative to the base 10, the second front pin 72a slides from the folded position to the flattened position at the sliding hole 425 of the front sliding portion 422a, and the second rear pin 72b slides from the folded position to the flattened position at the sliding hole 425 of the rear sliding portion 422 b.

Referring to fig. 4, 17 and 18, fig. 17 is a schematic cross-sectional structure of the foldable terminal 1000 shown in fig. 2, and fig. 18 is a schematic structure of the foldable terminal 1000 shown in fig. 17 in a folded state. Among them, the foldable terminal 1000 shown in fig. 17 and 18 shows only the foldable mechanism 130 and the foldable portion 230 of the display screen 200.

Specifically, the first fixing frame 21 is fixedly connected to the first housing 110, and the second fixing frame 22 is fixedly connected to the second housing 120. For example, the first fixing frame 21 may be fixedly connected to the first housing 110 by a fastener such as a screw or a bolt, and the second fixing frame 22 may be fixedly connected to the second housing 120 by a fastener such as a screw or a bolt.

When foldable terminal 1000 is in the flattened state, foldable mechanism 130 is accommodated in accommodating space 1301, and supporting surface 1302 of foldable mechanism 130 can support foldable portion 230 of display screen 200 to ensure good display of display screen 200. The supporting surface 1302 may be flush with the top surface of the first housing 110 and the top surface of the second housing 120, so that the foldable mechanism 130 may support the display screen 200 together with the first housing 110 and the second housing 120, so as to effectively support the display screen 200 by the foldable device 100 in the flattened state.

When foldable terminal 1000 is in the folded state, foldable portion 230 of display screen 200 is positioned inside foldable mechanism 130. Specifically, the foldable portion 230 is positioned within the escape space 1303. Wherein the foldable portion 230 is in the shape of a drop. At this time, the avoidance space 1303 of the foldable mechanism 130 may avoid the R angle formed when the foldable portion 230 is bent, so that the foldable portion 230 is not bent at a larger angle, thereby avoiding the undesirable phenomena such as crease generated in the display screen 200, and helping to prolong the service life of the display screen 200.

When the foldable terminal 1000 in the embodiment is switched between the folded state and the unfolded state, the movement process of the foldable mechanism 130 includes a real axis movement stage and a virtual axis movement stage, the first main swing arm 23 and the second main swing arm 24 are different in the two stages relative to the rotation center of the base 10, and accordingly, the first fixing frame 21 and the second fixing frame 22 are also different in the two stages relative to the rotation center of the base 10, so that the rotation centers of the first main swing arm 23 and the second main swing arm 24 in the two stages can be purposefully designed, the movement track of the display screen 200 in the folding and unfolding processes is changed, the design freedom of the movement track of the display screen 200 is improved, the stress state of the display screen 200 in the movement process is improved, the problems that creases generated by the display screen 200 are inverted arches and the like can be solved, the service life of the display screen 200 is prolonged, the use reliability of the foldable terminal 1000 is ensured, and the foldable part 230 of the display screen 200 is prevented from being in a water droplet shape when the foldable terminal 1000 is in the folded state, and interference between the foldable part 230 and the foldable mechanism 130 is avoided.

Referring to fig. 19 and 20, fig. 19 is a schematic structural view of a foldable mechanism 130 in a second foldable terminal according to an embodiment of the present application, and fig. 20 is an exploded structural view of the foldable mechanism 130 shown in fig. 19. Wherein the foldable mechanism 130 is shown in an unfolded state in fig. 19.

In the foldable terminal shown in this embodiment, the foldable mechanism 130 includes the base 10, the connection assembly 20, the damping assembly 30, the platen assembly 40, and the synchronization assembly 50. Illustratively, the base 10 extends in the Y-axis direction. The connection assembly 20, the damping assembly 30, the platen assembly 40, and the synchronization assembly 50 are all mounted to the base 10. The connection assembly 20 rotates the connection base 10 and can be folded or unfolded with respect to the base 10. The platen assembly 40 rotates to connect the base 10 and slidably connects the connection assembly 20. The synchronizing assembly 50 is slidably coupled to the base 10 and frictionally engages the platen assembly 40.

When the foldable mechanism 130 is in the folded state, both the connection assembly 20 and the platen assembly 40 are in the folded state. When the collapsible mechanism 130 is in the expanded state, both the connection assembly 20 and the platen assembly 40 are in the expanded state. During the process of switching the foldable mechanism 130 from the folded state to the unfolded state, both the connection assembly 20 and the platen assembly 40 are switched from the folded state to the unfolded state. During the process of switching the foldable mechanism 130 from the unfolded state to the folded state, both the connection assembly 20 and the platen assembly 40 are switched from the unfolded state to the folded state.

The connection assembly 20 includes a first mount 21, a second mount 22, a first main swing arm 23, and a second main swing arm 24. The first fixing frame 21 is located at one side of the base 10, and the second fixing frame 22 is located at the other side of the base 10. The first main swing arm 23 is connected between the first fixing frame 21 and the base 10, and the second main swing arm 24 is connected between the second fixing frame 22 and the base 10. Wherein, the first main swing arm 23 is fixedly connected with the first fixing frame 21 and is rotatably connected with the base 10. The second main swing arm 24 is fixedly connected with the second fixing frame 22, and is rotatably connected with the base 10. It will be appreciated that the first main swing arm 23 is fixedly connected to the first fixing frame 21, and the second main swing arm 24 is fixedly connected to the second fixing frame 22, so that not only the assembly stability between the first main swing arm 23 and the first fixing frame 21, and between the second main swing arm 24 and the second fixing frame 22 can be improved, but also the structure of the connection assembly 20 can be simplified, and thus the structural complexity of the foldable mechanism 130 can be reduced.

Illustratively, the first main swing arm 23 and the first fixing frame 21 may be integrally formed, and the second main swing arm 24 and the second fixing frame 22 may be integrally formed, so as to reduce the manufacturing cost of the connection assembly 20. In other embodiments, the first main swing arm 23 and the first mount 21 may be assembled to form an integrated structure, and/or the second main swing arm 24 and the second mount 22 may be assembled to form an integrated structure.

The platen assembly 40 is slidably and rotatably coupled to both the first mount 21 and the second mount 22. The platen assembly 40 includes a first platen 41, a second platen 42, a first platen swing arm 43, and a second platen swing arm 44. The first pressing plate 41 is slidably and rotatably connected to the first fixing frame 21. The second pressing plate 42 is slidably and rotatably connected to the second fixing frame 22. The first platen swing arm 43 is slidably connected to the first platen 41, and is rotatably connected to the base 10. The second platen swing arm 44 is slidably connected to the second platen 42 and rotatably connected to the base 10.

Note that, in the foldable mechanism 130 of the present embodiment, the connection assembly 20, the damping assembly 30, the platen assembly 40, and the synchronization assembly 50 are all one. In other embodiments, the number of one or more of the connecting assembly 20, the damping assembly 30, the platen assembly 40 and the synchronizing assembly 50 may be plural, and each of the components may be structured with reference to the relevant designs of the corresponding components hereinafter, and may be different from the corresponding components hereinafter in the details or positional arrangement of the components, which the present application is not particularly limited to.

Referring to fig. 20 and 21, fig. 21 is a schematic view of the structure of the base 10 in the foldable mechanism 130 shown in fig. 20.

The base 10 is provided with a first fitting groove 101, a second fitting groove 102, a first escape groove 104, a second escape groove 105, a first mounting groove 106, and a second mounting groove 107. The structures of the first mating groove 101, the second mating groove 102, the first avoidance groove 104, the second avoidance groove 105, the first mounting groove 106, and the second mounting groove 107 may be referred to in the first embodiment, and the descriptions related to the first mating groove 101, the second mating groove 102, the first avoidance groove 104, the second avoidance groove 105, the first mounting groove 106, and the second mounting groove 107 of the base 10 are not repeated herein.

In this embodiment, the base 10 includes a shaft cover 11 and a bracket 15, and the bracket 15 is fixedly connected to the shaft cover 11. Illustratively, the bracket 15 may be fixedly attached to the shaft cover 11 by screws or fasteners such as screws. In other embodiments, the shaft cover 11 and the bracket 15 may be integrally formed. Specifically, the bracket 15 is fixedly connected to the front end portion 11a of the shaft cover 11, and forms a first fitting groove 101 and a second fitting groove 102 around the shaft cover 11.

The shaft cover 11 extends in the Y-axis direction. The shaft cover 11 is provided with a first escape groove 104, a second escape groove 105, a first mounting groove 106, and a second mounting groove 107. Specifically, the first escape groove 104 and the second escape groove 105 are located at the front end portion (not shown) of the shaft cover 11. The first mounting groove 106 is located in the middle of the shaft cover 11 (not shown). The second mounting groove 107 is located at the rear end portion of the shaft cover 11. Wherein the first mounting groove 106 includes a first groove sidewall (not labeled), a second groove sidewall (not labeled), and a groove bottom wall (not labeled). The first groove side wall and the second groove side wall are oppositely arranged along the Y-axis direction. The groove bottom wall is connected between the first groove side wall and the second groove side wall. Illustratively, the first groove side wall is a groove side wall of the first mounting groove 106 near the front end portion of the shaft cover 11, and the second groove side wall is a groove side wall of the first mounting groove 106 near the rear end portion of the shaft cover 11.

The first slot side wall is provided with a first mounting hole 111 and a second mounting hole 112, and openings of the first mounting hole 111 and the second mounting hole 112 are located on a surface (not shown) of the first slot side wall facing the first mounting slot 106. The first mounting hole 111 and the second mounting hole 112 are each recessed from the first-groove side wall toward the surface of the first mounting groove 106 in a direction (negative Y-axis direction in the drawing) away from the surface (not shown) of the first mounting groove 106. The second mounting hole 112 is located at the left side of the first mounting hole 111 and is spaced from the first mounting hole 111.

The second groove side wall is provided with a first through hole 113 and a second through hole 114, and the first through hole 113 and the second through hole 114 penetrate through the second groove side wall along the Y-axis direction and are communicated with the first mounting groove 106 and the second mounting groove 107. Specifically, the second through hole 114 is located at the left side of the first through hole 113 and is spaced apart from the first through hole 113. Wherein, along the Y-axis direction, the first through hole 113 and the first mounting hole 111 are oppositely arranged, and the second through hole 114 and the second mounting hole 112 are oppositely arranged.

The bottom wall of the groove is provided with a pin shaft 115, and the pin shaft 115 is convexly arranged on the bottom wall of the first mounting groove 106. The pin 115 extends from the bottom wall of the first mounting groove 106 in the direction of the top surface (not shown) of the shaft cover 11 (in the positive Z-axis direction). Illustratively, the pin 115 is a circular shaft, and the axis of the pin 115 is parallel to the Z-axis direction. In other embodiments, the pin 115 may be a square shaft or other shaped shaft, which is not particularly limited in the embodiments of the present application.

Referring to fig. 20 to 22, fig. 22 is a schematic structural view of the damping assembly 30 and the synchronizing assembly 50 in the foldable mechanism 130 shown in fig. 20.

The damper assembly 30 is mounted to the second mounting groove 107. The damper assembly 30 includes a fixed member 34, a movable member 35, a plurality of damper shafts 36, and a plurality of elastic members 37. The fixed member 34 and the movable member 35 are both mounted to the second mounting groove 107. The fixed member 34 and the movable member 35 are spaced apart and disposed opposite to each other in the Y-axis direction. Wherein the movable member 35 is located at the front side of the fixed member 34 and is movable in the Y-axis direction with respect to the base 10 in the second mounting groove 107. It should be noted that in other embodiments, only one damping shaft 36 and only one elastic member 37 may be provided, and the number of damping shafts 36 and elastic members 37 is not particularly limited in the embodiments of the present application.

The movable member 35 is provided with two abutting portions 351, and the two abutting portions 351 are provided on a side of the movable member 35 away from the fixed member 34, and extend from a front end surface of the movable member 35 in a direction away from a rear end surface (not shown) (a negative Y-axis direction in the drawing). The two abutting portions 351 are provided at intervals in the X-axis direction.

A plurality of damper shafts 36 and a plurality of elastic members 37 are each installed between the fixed member 34 and the movable member 35. Specifically, one end of each damper shaft 36 is mounted to the fixed member 34, and the other end is mounted to the movable member 35. The axes of the damping shafts 36 are parallel to the Y-axis direction, and the damping shafts 36 are parallel to and spaced apart from each other in the X-axis direction. Each elastic member 37 is sleeved on one damping shaft 36. Illustratively, the resilient member 37 is a spring. In other embodiments, the elastic member 37 may be other elastic members.

The movable member 35 is sleeved on the plurality of damping shafts 36, and can move along the positive Y-axis direction relative to the plurality of damping shafts 36 to approach the fixed member 34, so as to squeeze the plurality of elastic members 37, and the plurality of elastic members 37 deform to generate damping force. The movable member 35 is also movable in the negative Y-axis direction with respect to the plurality of damper shafts 36 to move away from the fixed member 34, and the plurality of elastic members 37 are elastically restored to reduce the damping force. In the process of folding or unfolding the foldable terminal 1000, the user can feel the change of the damping force and experience better hand feeling, so that the use experience of the user is improved.

The synchronizing assembly 50 is mounted to the first mounting slot 106 and the second mounting slot 107. The synchronizing assembly 50 includes a first synchronizing shaft 51, a second synchronizing shaft 52, and a synchronizing slide 57. The first and second synchronizing shafts 51 and 52 are mounted in the first and second mounting grooves 106 and 107, and are disposed in parallel and at intervals along the X-axis direction. Specifically, the first synchronization shaft 51 is disposed through the first through hole 113 of the second groove sidewall, the first mounting groove 106, and the first mounting hole 111 of the first groove sidewall, and is rotatable relative to the base 10. The second synchronizing shaft 52 is disposed through the second through hole 114 of the second slot sidewall, the first mounting slot 106, and the second mounting hole 112 of the first slot sidewall, and is rotatable relative to the base 10. The first synchronizing shaft 51 includes a holding portion 511 facing the second mounting groove 107, and the second synchronizing shaft 52 includes a holding portion 521 facing the second mounting groove 107.

In the process of folding or unfolding the foldable terminal 1000, the first synchronization shaft 51 and the second synchronization shaft 52 rotate relative to the base 10, and the abutting part 511 of the first synchronization shaft 51 and the abutting part 521 of the second synchronization shaft 52 can respectively abut against the abutting part 351 of the movable member 35, so that the movable member 35 moves along the Y-axis direction relative to the base 10 to generate a damping force, and the user can feel the damping force to experience better hand feeling, thereby improving the use experience of the user.

The synchronizing slide 57 is mounted in the first mounting groove 106 and is slidable in the first mounting groove 106 relative to the base 10. The synchronizing slider 57 is located between the first synchronizing shaft 51 and the second synchronizing shaft 52 in the X-axis direction, and is disposed at a distance from both the first synchronizing shaft 51 and the second synchronizing shaft 52. The synchronization slider 57 is provided with a synchronization slide hole 571, a plurality of first synchronization slide grooves 572, and a plurality of second synchronization slide grooves 573. The synchronizing slide hole 571 is located in the middle of the synchronizing slide 57. The opening of the synchronizing slide hole 571 is located at the bottom surface (not shown) of the synchronizing slide 57. The synchronizing slide hole 571 is recessed from the bottom surface of the synchronizing slide 57 toward the top surface (not shown) in the direction of the positive Z-axis direction, and penetrates the top surface of the synchronizing slide 57. The synchronous sliding hole 571 is in a strip shape, and the length direction of the synchronous sliding hole 571 is parallel to the Y-axis direction. In other embodiments, the synchronizing slide hole 571 may not extend through the top surface of the synchronizing slide 5.

The structure of the synchronous sliding hole 571 is matched with the structure of the pin 115 in the first mounting groove 106. Specifically, the pin shaft 115 is disposed through the synchronous sliding hole 571, and is capable of sliding relative to the synchronous slider 57 in the synchronous sliding hole 571. When the synchronizing slider 57 slides in the Y-axis direction relative to the base 10 in the first mounting groove 106, the pin 115 slides in the length direction of the synchronizing slider 57 relative to the synchronizing slider 57 in the synchronizing slide hole 571, so as to realize a sliding connection between the synchronizing slider 57 and the base 10.

The first synchronization runners 572 are all located on the right side of the synchronization slider 57 and are arranged at intervals along the Y-axis direction. The opening of each first synchronization chute 572 is located on the right end face (not shown) of the synchronization slider 57. Each first synchronization runner 551 is recessed from the right end face of the synchronization slider 57 in a direction (negative X-axis direction shown) toward the left end face (not shown) and penetrates the top and bottom faces of the synchronization slider 57.

The second synchronization sliding grooves 573 are all located at the left side of the synchronization sliding block 57 and are arranged at intervals along the Y-axis direction. The opening of each second synchronization chute 573 is located on the left end face of the synchronization slider 57. Each of the second synchronization runners 573 is recessed from the left end face to the right end face of the synchronization slider 57 (X-axis positive direction shown) and penetrates the top and bottom faces of the synchronization slider 57.

Referring to fig. 23 and 24, fig. 23 is a schematic structural view of the platen assembly 40 in the foldable mechanism 130 shown in fig. 20, and fig. 24 is a schematic structural view of the platen assembly 40 shown in fig. 23 at another angle.

The first pressing plate 41 includes a supporting portion 411 and a guiding portion 413, and the guiding portion 413 is fixedly connected to the supporting portion 411. The supporting portion 411 and the guiding portion 413 may be integrally formed, so as to improve the structural strength of the first pressing plate 41 and ensure the structural stability of the first pressing plate 41. In other embodiments, the first pressing plate 41 may be an integral structure formed by assembling, for example, the guiding portion 413 may be fixedly connected to the supporting portion 411 by welding or bonding.

The support portion 411 has a substantially elongated plate shape and extends in the Y-axis direction. The support portion 411 is provided with a slide hole 417, an opening of the slide hole 417 is located on a left side surface (not shown) of the support portion 411, and the slide hole 417 is recessed from a left side surface of the support portion 411 in a direction (not shown) toward a right side surface (not shown) in the X-axis positive direction, and penetrates a right side surface of the support portion 411. Illustratively, slide aperture 417 is a square aperture. In other embodiments, the sliding hole 417 may be a circular hole or other shaped hole, and/or the sliding hole 417 may not extend through the right side of the support 411.

The guide portion 413 is fixedly connected to the bottom surface of the support portion 411, is positioned in front of the slide hole 417, and is spaced apart from the slide hole 417. Specifically, the guide portion 413 extends from the bottom surface of the support portion 411 in a direction away from the top surface (negative Z-axis direction in the drawing). Wherein the guiding portion 413 is an arc plate. Illustratively, there are two guide portions 413, and the two guide portions 413 are a front guide portion 413a and a rear guide portion 413b, respectively, and the rear guide portion 413b is located at a rear side of the front guide portion 413a and is spaced apart from the front guide portion 413 a. In other embodiments, there may be only one guide 413, or the number of guides 413 may be more than three.

Referring to fig. 21, the first platen swing arm 43 is slidably connected to the first platen 41, and is rotatably connected to the base 10. The first platen swing arm 43 includes a sliding portion 431, a rotating portion 432, and a connecting portion 433, and the connecting portion 433 is fixedly connected between the sliding portion 431 and the rotating portion 432. Wherein, the sliding portion 431, the rotating portion 432 and the connecting portion 433 may be integrally formed.

The sliding portion 431 has a planar plate shape. The structure of the sliding portion 431 is adapted to the structure of the sliding hole 417 in the first pressing plate 41. The sliding portion 431 is disposed through the sliding hole 417 of the first pressing plate 41, and is capable of sliding relative to the first pressing plate 41 in the sliding hole 417, so as to realize sliding connection between the sliding portion 431 and the first pressing plate 41, and further realize sliding connection between the first pressing plate swing arm 43 and the first pressing plate 41.

The rotating portion 432 is mounted to the first mounting groove 106. Specifically, the rotating portion 432 is sleeved on the first synchronization shaft 51, and can drive the first synchronization shaft 51 to rotate relative to the base 10, so as to realize rotational connection between the rotating portion 432 and the base 10, and further realize rotational connection between the first pressing plate swing arm 43 and the base 10.

In addition, the rotating portion 432 is provided with a plurality of synchronizing protrusions 434, and the synchronizing protrusions 434 are disposed on one side of the rotating portion 432 away from the connecting portion 433 and are arranged at intervals along the Y-axis direction. Wherein each of the synchronization bumps 434 is spirally disposed around the rotation center of the rotation portion 432.

Referring to fig. 22, the structure of each synchronization protrusion 434 is matched with the structure of the first synchronization chute 572 in the synchronization slider 57. The plurality of synchronization bumps 434 are respectively mounted on the plurality of first synchronization sliding grooves 572, and can slide relative to the synchronization sliding blocks 57 in the first synchronization sliding grooves 572, so as to realize friction connection between the rotating portion 432 and the synchronization sliding blocks 57, and further realize friction connection between the first pressing plate swing arm 43 and the synchronization sliding blocks 57.

Referring to fig. 23 and 24, the second pressing plate 42 includes a supporting portion 421 and a guiding portion 423, and the guiding portion 423 is fixedly connected to the supporting portion 421. In the present embodiment, the structures of the supporting portion 421 and the guide portion 423 can be referred to the related description of the supporting portion 411 and the guide portion 413 in the first platen 41. Wherein, the supporting portion 421 is provided with a sliding hole 427. The number of the guide portions 423 is two, and the two guide portions 423 are a front guide portion 423a and a rear guide portion 423b, respectively.

The second platen swing arm 44 is slidably connected to the second platen 42 and rotatably connected to the base 10. The second platen swing arm 44 includes a sliding portion 441, a rotating portion 442, and a connecting portion 443, and the connecting portion 443 is fixedly connected between the rotating portion 442 and the sliding portion 441. The structure of the second platen swing arm 44, the matching relationship between the second platen swing arm 44 and the second platen 42, and the matching relationship between the second platen swing arm 44 and the base 10 can all be referred to in the related description of the first platen swing arm 43.

The sliding portion 441 has a structure adapted to the structure of the sliding hole 427 of the second pressing plate 42. The sliding portion 441 is disposed through the sliding hole 427 of the second pressing plate 42, and is capable of sliding relative to the second pressing plate 42 in the sliding hole 427, so as to realize sliding connection between the sliding portion 441 and the second pressing plate 42, and further realize sliding connection between the second pressing plate swing arm 44 and the second pressing plate 42.

The rotating portion 442 is mounted to the first mounting groove 106. The rotation portion 442 of the second platen swing arm 44 is spaced apart from the rotation portion 432 of the first platen swing arm 43 in the X-axis direction. Specifically, the rotating portion 442 is sleeved on the second synchronizing shaft 52, and can drive the second synchronizing shaft 52 to rotate relative to the base 10, so as to realize rotational connection between the rotating portion 442 and the base 10, and further realize rotational connection between the second pressing plate swing arm 44 and the base 10. Further, the rotating portion 442 is provided with a plurality of synchronizing protrusions 444.

Referring to fig. 22, the structure of each synchronization protrusion 444 is matched with the structure of a second synchronization chute 573 in the synchronization slider 57. Specifically, the plurality of synchronization protrusions 444 are respectively mounted on the plurality of second synchronization sliding grooves 573, and can slide relative to the synchronization sliding block 57 in the second synchronization sliding grooves 573, so as to realize friction connection between the rotation portion 442 and the synchronization sliding block 57, and further realize friction connection between the second pressing plate swing arm 44 and the synchronization sliding block 57.

When the first pressing plate 41 rotates relative to the base 10, the first pressing plate 41 drives the first pressing plate swing arm 43 to slide relative to the first pressing plate 41 and rotate relative to the base 10, the first pressing plate swing arm 43 drives the synchronous sliding block 57 to move along the Y-axis direction relative to the base 10, the synchronous sliding block 57 drives the second pressing plate swing arm 44 to rotate relative to the base 10 and slide relative to the second pressing plate 42, and the second pressing plate swing arm 44 drives the second pressing plate 42 to rotate relative to the base 10, so that synchronous rotation of the first pressing plate 41 and the second pressing plate 42 relative to the base 10 is realized.

Similarly, when the second pressing plate 42 rotates relative to the base 10, the second pressing plate 42 drives the second pressing plate swing arm 44 to slide relative to the second pressing plate 42 and also rotate relative to the base 10, and the second pressing plate swing arm 44 drives the synchronous sliding block 57 to move along the Y-axis direction relative to the base 10, so that the synchronous sliding block 57 drives the first pressing plate swing arm 43 to rotate relative to the base 10 and also slide relative to the first pressing plate 41, and the first pressing plate swing arm 43 drives the first pressing plate 41 to rotate relative to the base 10, so that synchronous rotation of the first pressing plate 41 and the second pressing plate 42 relative to the base 10 is realized.

In other words, in the foldable mechanism 130 shown in the present embodiment, the first platen swing arm 43 and the second platen swing arm 44 of the platen assembly 40 can also function as a synchronous swing arm, so that the synchronous swing arm of the synchronous assembly 50 is omitted, the structural complexity of the foldable mechanism 130 is reduced, the structural members of the foldable mechanism 130 are reduced, the weight of the foldable mechanism 130 is reduced, and the lightweight design of the foldable terminal 1000 is facilitated.

Referring to fig. 25 and 26, fig. 25 is a schematic structural view of the connecting assembly 20 in the foldable mechanism 130 shown in fig. 20, and fig. 26 is a schematic structural view of the connecting assembly 20 shown in fig. 25 at another angle.

The first fixing frame 21 is provided with a guiding chute 218, and an opening of the guiding chute 218 is located on a top surface (not shown) of the first fixing frame 21. The guide chute 218 is recessed from the top surface of the first fixing frame 21 toward the bottom surface (not shown) in the direction of the negative Z axis direction, and penetrates the right side surface (not shown) of the first fixing frame 21. Wherein the guiding chute 218 is an arc-shaped slot. That is, the groove top wall surface (not shown) and the groove bottom wall surface (not shown) of the guide chute 218 are both arc-shaped surfaces.

Illustratively, there are two guide runners 218, and the two guide runners 218 are spaced apart along the Y-axis. The two guide runners 218 are a front guide runner 218a and a rear guide runner 218b, respectively. The front guide chute 218a is located at a front end portion (not shown) of the first fixing frame 21 and penetrates a front end surface (not shown) of the first fixing frame 21. The rear guide chute 218b is located at a rear end portion (not shown) of the first fixing frame 21 and penetrates a rear end surface (not shown) of the first fixing frame 21. Wherein the front guiding chute 218a is adapted to the structure of the front guiding portion 413a (as shown in fig. 24) of the first pressing plate 41, and the rear guiding chute 218b is adapted to the structure of the rear guiding portion 413b (as shown in fig. 24) of the first pressing plate 41.

The first main swing arm 23 includes a sliding portion 232 and a connecting portion 233, and the connecting portion 233 is fixedly connected between the sliding portion 232 and the first fixing frame 21. The sliding portion 232 and the connecting portion 233 may be integrally formed with the first fixing frame 21 to increase the assembling stability of the connecting assembly 20.

Referring to fig. 21, the structure of the sliding portion 232 is matched with the structure of the first matching groove 101. The sliding portion 232 has a substantially arc-shaped plate shape. That is, both the top surface (not shown) and the bottom surface (not shown) of the sliding portion 232 are arc-shaped surfaces. The sliding portion 232 is provided with a pin 236, the pin 236 is disposed on a side of the sliding portion 232 away from the connecting portion 233, and the diameter of the pin 236 is equal to the thickness of the sliding portion 232.

The sliding portion 232 is mounted in the first matching groove 101, and can rotate relative to the base 10 in the first matching groove 101, so that the sliding portion 232 is rotationally connected with the base 10, the first main swing arm 23 is rotationally connected with the base 10, and the first fixing frame 21 is rotationally connected with the base 10. Wherein, the top surface of the sliding part 232 contacts with the groove top wall surface of the first matching groove 101, and the bottom surface of the sliding part 232 contacts with the groove bottom wall surface of the first matching groove 101.

In the process of rotating the first fixing frame 21 and the first main swing arm 23 relative to the base 10, there are two cases that the first main swing arm 23 performs virtual axis rotation relative to the base 10 and the first main swing arm 23 performs real axis rotation relative to the base 10. When the first main swing arm 23 rotates about an imaginary axis relative to the base 10, the sliding portion 232 can slide and rotate relative to the base 10 in the first engagement slot 101, and the pin 236 of the sliding portion 232 can slide between the flattened position and the switching position of the first engagement slot 101. In the virtual rotation stage, the rotation center of the first main swing arm 23 relative to the base 10 is a first center, and the first center is the axis of the first mating groove 101.

When the first main swing arm 23 performs a real-axis rotation with respect to the base 10, the sliding portion 232 performs a real-axis rotation with respect to the base 10, and the sliding portion 232 can rotate with respect to the base 10 in the first engagement groove 101, and the pin 236 of the sliding portion 232 is always located at the switching position of the first engagement groove 101. The rotation center of the first main swing arm 23 relative to the base 10 is a second center, and the second center is the axis of the pin 236 of the sliding portion 232 and is spaced from the first center.

Referring to fig. 25 and 26, the second fixing frame 22 is provided with a guiding chute 228. In this embodiment, the structure of the guiding chute 228 can refer to the related description of the guiding chute 218 of the first fixing frame 21, and will not be described herein. The guiding chute 228 also penetrates the left side surface of the second fixing frame 22. Illustratively, there are two guide runners 228, with the two guide runners 228 being a front guide runner 228a and a rear guide runner 228b, respectively. The front guiding chute 228a is adapted to the structure of the front guiding portion 423a (shown in fig. 24) of the second pressing plate 42, and the rear guiding chute 228b is adapted to the structure of the rear guiding portion 423b (shown in fig. 24) of the second pressing plate 42.

Referring to fig. 25 and 26, the second main swing arm 24 includes a sliding portion 242 and a connecting portion 243, and the connecting portion 243 is fixedly connected between the sliding portion 242 and the second fixing frame 22. In the present embodiment, the structure of the second main swing arm 24, the matching relationship between the second main swing arm 24 and the second fixing frame 22, and the matching relationship between the second main swing arm 24 and the base 10 can be referred to the related description of the first main swing arm 23.

Referring to fig. 21, the structure of the sliding portion 242 is matched with the structure of the second matching groove 102. Wherein the sliding portion 242 is provided with a pin 246. Specifically, the sliding portion 242 is mounted in the second mating groove 102 and is rotatable in the second mating groove 102 relative to the base 10. Wherein, the top surface of the sliding portion 242 contacts with the groove top wall surface (not shown) of the second mating groove 102, and the bottom surface of the sliding portion 242 contacts with the groove bottom wall surface (not shown) of the second mating groove 102.

In the process of rotating the second main swing arm 24 relative to the base 10, there are two cases that the second main swing arm 24 performs virtual axis rotation relative to the base 10 and the second main swing arm 24 performs real axis rotation relative to the base 10. When the second main swing arm 24 rotates about the virtual axis relative to the base 10, the sliding portion 242 can slide and rotate relative to the base 10 in the second matching groove 102, and the pin 246 of the sliding portion 242 can slide between the flattened position and the switching position of the second matching groove 102. In the virtual rotation stage, the rotation center of the second main swing arm 24 relative to the base 10 is a third center, and the third center is the axis of the second mating groove 102.

When the second main swing arm 24 performs a real-axis rotation with respect to the base 10, the sliding portion 242 performs a real-axis rotation with respect to the base 10, and the sliding portion 242 can rotate with respect to the base 10 in the second engagement groove 102, and the pin 246 of the sliding portion 242 is always located at the switching position of the second engagement groove 102. The rotation center of the second main swing arm 24 relative to the base 10 is a fourth center, and the fourth center is the axis of the pin 246 of the sliding portion 242 and is spaced from the third center.

In the connecting assembly 20 of the present embodiment, when the first fixing frame 21 rotates relative to the base 10, the first fixing frame 21 drives the first main swing arm 23 to rotate relative to the base 10, and when the second fixing frame 22 rotates relative to the base 10, the second fixing frame 22 drives the second main swing arm 24 to rotate relative to the base 10.

Referring to fig. 23 to 26, in the first pressing plate 41, the supporting portion 411 may be located at a top side of the first fixing frame 21, the front guiding portion 413a is mounted on the front guiding chute 218a and may slide and rotate in the front guiding chute 218a relative to the first fixing frame 21, the rear guiding portion 413b is mounted on the rear guiding chute 218b and may slide and rotate in the rear guiding chute 218b relative to the first fixing frame 21, so as to realize sliding and rotating connection between the front guiding portion 413a and the rear guiding portion 413b and the first fixing frame 21, and further realize sliding and rotating connection between the first pressing plate 41 and the first fixing frame 21, so as to improve assembly stability between the first pressing plate 41 and the connecting component 20.

In the second pressing plate 42, the supporting portion 411 may be located at a top side of the second fixing frame 22, the front guiding portion 423a is mounted on the front guiding chute 228a and may slide and rotate in the front guiding chute 228a relative to the second fixing frame 22, and the rear guiding portion 423b is mounted on the rear guiding chute 228b and may slide and rotate in the rear guiding chute 228b relative to the second fixing frame 22, so as to realize sliding and rotating connection between the front guiding portion 423a and the rear guiding portion 423b and the second fixing frame 22, and further realize sliding and rotating connection between the second pressing plate 42 and the second fixing frame 22, so as to improve assembly stability between the second pressing plate 42 and the connecting assembly 20.

When the first fixing frame 21 rotates relative to the base 10, the first fixing frame 21 drives the first pressing plate 41 to slide and rotate relative to the first fixing frame 21, and also rotates relative to the base 10, and the first pressing plate 41 drives the first pressing plate swing arm 43 to slide relative to the first pressing plate 41 and rotate relative to the base 10. Similarly, when the second fixing frame 22 rotates relative to the base 10, the second fixing frame 22 drives the second pressing plate 42 to slide and rotate relative to the second fixing frame 22, and also rotates relative to the base 10, and the second pressing plate 42 drives the second pressing plate swing arm 42 to slide relative to the second pressing plate 42 and also slide relative to the base 10.

Therefore, when the connection assembly 20 is switched between the folded state and the flattened state, the first fixing frame 21 and the second fixing frame 22 rotate relative to the base 10, the first fixing frame 21 and the second fixing frame 22 can respectively drive the first pressing plate 41 and the second pressing plate 42 to rotate relative to the base 10, so that the first pressing plate 41 and the second pressing plate 42 can relatively rotate, the first pressing plate 41 and the second pressing plate 42 can respectively drive the first pressing plate swing arm 43 and the second pressing plate swing arm 44 to rotate relative to the base 10, and accordingly, the first pressing plate swing arm 43 and the second pressing plate swing arm 44 can relatively rotate, and further, the mutual switching of the pressing plate assembly 40 between the folded state and the flattened state is realized.

Referring to fig. 19 and 27, fig. 27 is a schematic cross-sectional view of the foldable mechanism 130 shown in fig. 19 taken along the line III-III.

With the collapsible mechanism 130 in the flattened state, both the link assembly 20 and the platen assembly 40 are in the flattened state. In the connecting assembly 20, the first fixing frame 21 and the second fixing frame 22 are respectively located at two opposite sides of the base 10 and are flattened relatively, the first main swing arm 23 and the second main swing arm 24 are flattened relatively, the top surface of the sliding part 232 in the first main swing arm 23 is attached to the groove top wall surface of the first matching groove 101, the bottom surface of the sliding part 232 in the first main swing arm 23 is attached to the groove bottom wall surface of the first matching groove 101, the top surface of the sliding part 242 in the second main swing arm 24 is attached to the groove top wall surface of the second matching groove 102, and the bottom surface of the sliding part 242 in the second main swing arm 24 is attached to the groove bottom wall surface of the second matching groove 102. Wherein, the pin 236 of the sliding part 232 in the first main swing arm 23 is located at the flattened position of the first matching groove 101, and the pin 246 of the sliding part 242 in the second main swing arm 24 is located at the flattened position of the second matching groove 102.

In the platen assembly 40, the first platen 41 and the second platen 42 are located on opposite sides of the base 10 and are relatively flattened, and the first platen swing arm 43 and the second platen swing arm 44 are relatively flattened. Wherein the top surface of the first pressing plate 41 (i.e., the top surface of the supporting portion 411) and the top surface of the second pressing plate 42 (i.e., the top surface of the supporting portion 421) are flush, and form a supporting surface 1302 together with the top surface of the base 10.

Referring to fig. 28 and 29, fig. 28 is a schematic structural view of the foldable mechanism 130 shown in fig. 27 in a folded state, and fig. 29 is a schematic structural view of the foldable mechanism 130 shown in fig. 19 in a folded state after being cut along IV-IV.

When the foldable mechanism 130 is in the folded state, both the connection assembly 20 and the platen assembly 40 are in the folded state. In the connecting assembly 20, the first fixing frame 21 and the second fixing frame 22 are arranged at intervals and are opposite to each other, the first main swing arm 23 and the second main swing arm 24 are arranged at intervals and are opposite to each other, the pin shaft 236 of the sliding part 232 in the first main swing arm 23 is located at the switching position of the first matching groove 101, and the pin shaft 246 of the sliding part 242 in the second main swing arm 24 is located at the switching position of the second matching groove 102. The first avoidance groove 104 avoids the portion of the sliding portion 232 of the first main swing arm 23 away from the connecting portion 233, the second avoidance groove 105 avoids the portion of the sliding portion 242 of the second main swing arm 24 away from the connecting portion 233, which not only can avoid interference between the first main swing arm 23 and the second main swing arm 24 and the base 10 when the first main swing arm 23 and the second main swing arm 24 rotate relative to the base 10, but also can ensure smoothness of rotation of the first main swing arm 23 and the second main swing arm 24 relative to the base 10, thereby being beneficial to improving movement smoothness of the foldable mechanism 130, further improving comfort of a user using the foldable terminal 1000, and playing a role of stopping positions, so that the first main swing arm 23 and the second main swing arm 24 keep a folded state relative to the base 10.

At this time, the sliding portion 232 of the first main swing arm 23 and the sliding portion 242 of the second main swing arm 24 are both located between the left and right side surfaces of the base 10. In other words, the sliding portion 232 of the first main swing arm 23 and the sliding portion 242 of the second main swing arm 24 do not protrude from the side surface of the base 10, and the sliding portion 232 of the first main swing arm 23 and the sliding portion 242 of the second main swing arm 24 completely reuse the thickness space of the base 10, reducing the thickness of the foldable mechanism 130 in the folded state, and contributing to the light and thin design of the foldable terminal 1000.

In the platen assembly 40, the first platen 41 and the second platen 42 are folded relatively, the first platen swing arm 43 and the second platen swing arm 44 are folded relatively, and the base 10, the connection assembly 20 and the platen assembly 40 enclose to form the avoidance space 1303. The cross section of the avoiding space 1303 is in a shape of a droplet.

Referring to fig. 30, fig. 30 is a schematic diagram illustrating a structure of the foldable mechanism 130 shown in fig. 27 in a semi-folded state.

Wherein, the connection assembly 20 is in a semi-folded state, the pin 236 of the sliding portion 232 in the first main swing arm 23 is in the switching position of the first mating slot 101, and the pin 246 of the sliding portion 242 in the second main swing arm 24 is in the switching position of the second mating slot 102.

It should be noted that, in the embodiment of the present application, the foldable mechanism 130 is switched from the unfolded state to the folded state and vice versa, and includes a virtual axis rotation stage and a real axis rotation stage. In the virtual axis rotation stage, the first main swing arm 23 and the second main swing arm 24 each perform virtual axis rotation with respect to the base 10. In the real-axis rotation stage, the first main swing arm 23 and the second main swing arm 24 each perform real-axis rotation of the base 10.

As shown in fig. 27 and 30, in the virtual axis rotation stage, the first fixing frame 21 rotates around the counterclockwise direction relative to the base 10, the first fixing frame 21 drives the first main swing arm 23 to slide and rotate relative to the base 10, and the pin 236 of the sliding portion 232 in the first main swing arm 23 slides from the flattened position of the first mating slot 101 to the switching position. The second fixing frame 22 rotates clockwise relative to the base 10, the second fixing frame 22 drives the second main swing arm 24 to slide and rotate relative to the base 10, and the pin 246 of the sliding part 242 in the second main swing arm 24 slides from the flattened position of the second matching groove 102 to the switching position.

As shown in fig. 28 and 30, in the real-axis rotation stage, the first fixing frame 21 continues to rotate around the counterclockwise direction relative to the base 10, the first fixing frame 21 drives the first main swing arm 23 to rotate relative to the base 10, and the pin 236 of the sliding portion 232 in the first main swing arm 23 is always located at the switching position of the first matching slot 101. The second fixing frame 22 continues to rotate clockwise relative to the base 10, the second fixing frame 22 drives the second main swing arm 24 to rotate relative to the base 10, and the pin 246 of the sliding part 242 in the second main swing arm 24 is always located at the switching position of the second matching groove 102.

As shown in fig. 28 and 30, in the real-axis rotation stage, the first fixing frame 21 rotates clockwise relative to the base 10, the first fixing frame 21 drives the first main swing arm 23 to rotate relative to the base 10, and the pin 236 of the sliding portion 232 in the first main swing arm 23 is always located at the switching position of the first matching slot 101. The second fixing frame 22 rotates around the anticlockwise direction relative to the base 10, the second fixing frame 22 drives the second main swing arm 24 to rotate relative to the base 10, and the pin 246 of the sliding part 242 in the second main swing arm 24 is always located at the switching position of the second matching groove 102.

As shown in fig. 27 and 30, in the virtual axis rotation stage, the first fixing frame 21 continues to rotate clockwise relative to the base 10, the first fixing frame 21 drives the first main swing arm 23 to slide and rotate relative to the base 10, and the pin 236 of the sliding portion 232 in the first main swing arm 23 slides from the switching position of the first mating slot 101 to the flattening position. The second fixing frame 22 continues to rotate around the counterclockwise direction relative to the base 10, the second fixing frame 22 drives the second main swing arm 24 to slide and rotate relative to the base 10, and the pin 246 of the sliding portion 242 in the second main swing arm 24 slides from the switching position of the second matching groove 102 to the flattening position.

In the process of switching between the folded state and the unfolded state of the foldable mechanism 130, when the first main swing arm 23 and the second main swing arm 24 rotate relative to the base 10, two conditions of real-axis rotation and virtual-axis rotation exist, and the rotation centers of the first main swing arm 23 and the second main swing arm 24 relative to the base 10 are different in the two conditions. In other words, the movement track of the first main swing arm 23 and the second main swing arm 24 in the state switching process is changed, and correspondingly, the movement track of the first fixing frame 21 and the second fixing frame 22 in the state switching process is changed, so that the rotation centers of the real axis rotation stage and the virtual axis rotation stage can be designed pertinently, the design freedom degree of the foldable mechanism 130 in the state switching process is improved, the stress state of the display screen 200 in the state switching process of the foldable terminal 1000 is improved, and the problems of crease, invert and the like, which are easily generated by the display screen 200, are solved.

Referring to fig. 31 and 32, fig. 31 is a schematic cross-sectional structure of a second foldable terminal 1000 according to an embodiment of the present application in a flattened state, and fig. 32 is a schematic structure of the foldable terminal 1000 shown in fig. 31 in a folded state. Of these, fig. 31 and 32 only show the foldable mechanism 130 and the foldable portion 230 of the display screen 200.

It should be noted that, the cooperation between the foldable mechanism 130 and the first housing 110 and the second housing 120 (as shown in fig. 3 and 4) in this embodiment may refer to the related description of the foldable mechanism 130 in the first embodiment, which is not repeated herein.

As shown in fig. 31, when foldable terminal 1000 is in a flattened state, support surface 1302 of foldable mechanism 130 can support foldable portion 230 of display screen 200 to ensure a good display of display screen 200. The supporting surface 1302 may be flush with the top surface of the first housing 110 and the top surface of the second housing 120, so that the foldable mechanism 130 may support the display screen 200 together with the first housing 110 and the second housing 120, so as to effectively support the display screen 200 by the foldable device (not shown) in a flattened state.

As shown in fig. 32, when foldable terminal 1000 is in the folded state, foldable portion 230 of display screen 200 is positioned inside foldable mechanism 130. Specifically, the foldable portion 230 is positioned within the escape space 1303. Wherein the foldable portion 230 is "drop-shaped". At this time, the avoidance space 1303 of the foldable mechanism 130 may avoid the R angle formed when the foldable portion 230 is bent, so that the foldable portion 230 is not bent at a larger angle, thereby avoiding bad sites such as folds generated in the display screen 200, and helping to prolong the service life of the display screen 200.

When the foldable terminal 1000 in the embodiment is switched between the folded state and the unfolded state, the movement process of the foldable mechanism 130 includes a real-axis movement stage and a virtual-axis movement stage, the first main swing arm 23 and the second main swing arm 24 are different in the two stages relative to the rotation center of the base 10, and accordingly, the first fixing frame 21 and the second fixing frame 22 are also different in the two stages relative to the rotation center of the base 10, so that the rotation centers of the first main swing arm 23 and the second main swing arm 24 in the two stages can be purposefully designed, the movement track of the display screen 200 in the folding and unfolding processes is changed, the design freedom of the movement track of the display screen 200 is improved, the stress state of the display screen 200 in the movement process is improved, the problems that creases generated by the display screen 200 are inverted arches and the like can be solved, the service life of the display screen 200 is prolonged, the use reliability of the foldable terminal 1000 is ensured, and the foldable part 230 of the display screen 200 is prevented from being in a ' water drop ' shape ' when the foldable terminal 1000 is in the folded state, and the foldable mechanism 130 is interfered between the foldable part 230 and the foldable mechanism.

Referring to fig. 33 and 34, fig. 33 is a schematic view of a part of a foldable mechanism 130 in a third foldable terminal according to an embodiment of the application, and fig. 34 is a schematic view of an exploded structure of the foldable mechanism 130 shown in fig. 33. Wherein the foldable mechanism 130 is shown in an unfolded state in fig. 33.

In the foldable terminal shown in this embodiment, the foldable mechanism 130 includes the base 10, the connection assembly 20, and the pressing plate assembly 40. Illustratively, the base 10 extends in the Y-axis direction. The connection assembly 20 and the platen assembly 40 are both mounted to the base 10. The connection assembly 20 rotates the connection base 10 and can be folded or unfolded with respect to the base 10. The platen assembly 40 rotates to connect the base 10 and slidably connects the connection assembly 20.

The connection assembly 20 includes a first mount 21, a second mount 22, a first main swing arm 23, a second main swing arm 24, a first sub swing arm 25, and a second sub swing arm 26. The first fixing frame 21 is located at one side of the base 10, and the second fixing frame 22 is located at the other side of the base 10. The first main swing arm 23 is connected between the first fixing frame 21 and the base 10, and the second main swing arm 24 is connected between the second fixing frame 22 and the base 10. The first auxiliary swing arm 25 is connected between the first fixing frame 21 and the base 10, and the second auxiliary swing arm 26 is connected between the second fixing frame 22 and the base 10. Wherein, the first main swing arm 23 is fixedly connected with the first fixing frame 21 and is rotatably connected with the base 10. The second main swing arm 24 is fixedly connected with the second fixing frame 22, and is rotatably connected with the base 10. The first auxiliary swing arm 25 is slidably and rotatably connected to the first fixing frame 21, and is rotatably connected to the base 10. The second auxiliary swing arm 26 slides and is connected to the second fixing frame 22, and rotates to connect to the base 10. Illustratively, the first fixing frame 21 and the first main swing arm 23 may be integrally formed, and the second fixing frame 22 and the second main swing arm 24 may be integrally formed. In other embodiments, the first main swing arm 23 and the first mount 21 may be assembled to form an integrated structure, and/or the second main swing arm 24 and the second mount 22 may be assembled to form an integrated structure.

The platen assembly 40 is slidably and rotatably coupled to the first mount 21 and the second mount 22. The platen assembly 40 includes a first platen 41, a second platen 42, a first platen swing arm 43, and a second platen swing arm 44. The first pressing plate 41 and the first fixing frame 21 are located on the same side of the base 10. The second platen 42 is located on the same side of the base 10 as the second mount 22. The first platen swing arm 43 is slidably connected to the first platen 41 and rotates to connect the base 10, and the second platen swing arm 44 is slidably connected to the second platen 42 and rotates to connect the base 10.

It should be noted that, in other embodiments, the foldable mechanism 130 may also include a damping assembly and/or a synchronization assembly, where the damping assembly and the synchronization assembly may be configured as described above with reference to the damping assembly 30 and the synchronization assembly 50 of the foldable mechanism 130 in the two embodiments. In addition, the number of the connecting assemblies 20 and/or the pressing plate assemblies 40 may be plural, and each assembly may be structured by referring to the related design of the corresponding assembly hereinafter, and may be different from the corresponding assembly hereinafter in details or positional arrangement of the components, which is not particularly limited in the present application.

Referring to fig. 35, fig. 35 is a schematic view of the structure of the base 10 in the foldable mechanism 130 shown in fig. 34.

The base 10 is provided with a first engagement groove 101, a second engagement groove 102, a third engagement groove 108, a fourth engagement groove 109, a first rotation groove 1010, and a second rotation groove 1011. The openings of the first engagement groove 101, the second engagement groove 102, the third engagement groove 108, the fourth engagement groove 109, the first rotation groove 1010, and the second rotation groove 1011 are all located on the top surface (not shown) of the base 10. The first engagement groove 101, the second engagement groove 102, the third engagement groove 108, the fourth engagement groove 109, the first rotation groove 1010, and the second rotation groove 1011 are recessed from the top surface of the base 10 toward the bottom surface (not shown) in the direction (negative Z-axis direction in the drawing).

The first fitting groove 101 and the second fitting groove 102 are disposed opposite to each other in the X-axis direction. The first fitting groove 101 is located on the right side of the base 10. The first fitting groove 101 includes an arc-shaped groove portion (not shown), and a groove bottom wall surface (not shown) of the arc-shaped groove portion in the first fitting groove 101 are arc-shaped surfaces. Wherein, the arc-shaped groove part of the first fitting groove 101 has a rotation position and a folding position, and the rotation position of the first fitting groove 101 is located inside the folding position of the first fitting groove 101. Illustratively, the rotational position of the first mating groove 101 is located at an innermost side of the first mating groove 101, and the folded position of the first mating groove 101 is located at an outermost side of the first mating groove 101. In other embodiments, the rotational position of the first mating groove 101 may be located at other positions of the first mating groove 101, and/or the folded position of the first mating groove 101 may be located at other positions of the first mating groove 102.

The structure of the second fitting groove 102 is substantially the same as that of the first fitting groove 101. The second mating groove 102 includes an arc-shaped groove portion, and a groove top wall surface (not shown) and a groove bottom wall surface (not shown) of the arc-shaped groove portion in the second mating groove 102 are arc-shaped surfaces. The arc-shaped groove part of the second matching groove 102 has a rotating position and a folding position, and the rotating position of the second matching groove 102 is positioned at the inner side of the folding position of the second matching groove 102. Illustratively, the rotational position of the second mating groove 102 is located innermost of the second mating groove 102 and the folded position of the second mating groove 102 is located outermost of the second mating groove 102. In other embodiments, the rotational position of the second mating groove 102 may be located elsewhere in the second mating groove 102, and/or the folded position of the second mating groove 102 may be located elsewhere in the second mating groove 102.

The third fitting groove 108 and the fourth fitting groove 109 are spaced apart and disposed opposite to each other in the X-axis direction. The third fitting groove 108 is located at the front side of the first fitting groove 101 and is spaced apart from the first fitting groove 101. The third mating groove 108 includes two groove side walls (not shown) spaced apart and disposed opposite each other in the Y-axis direction. Each of the groove side walls is provided with a mounting hole (not shown), and an opening of the mounting hole is located on a surface of the groove side wall facing the third fitting groove 108. The mounting hole is recessed from the groove side wall toward the surface of the third fitting groove 108 in a direction away from the third fitting groove 108. Illustratively, the mounting holes are circular holes, the axes of the mounting holes of the two groove side walls are parallel to the Y-axis direction, and the mounting holes of the two groove side walls are coaxial.

The structure of the fourth fitting groove 109 is substantially the same as that of the third fitting groove 108. The fourth fitting groove 109 is located at the front side of the second fitting groove 102 and is spaced apart from the second fitting groove 102. The fourth mating groove 109 includes two groove side walls (not shown) spaced apart and disposed opposite each other in the Y-axis direction. Wherein, each groove sidewall of the fourth mating groove 109 is provided with a mounting hole 1091. Illustratively, the mounting hole 1091 is a circular hole, the axes of the mounting holes of the two slot side walls are both parallel to the Y-axis direction, and the mounting holes of the two slot side walls are coaxial.

The first rotating groove 1010 and the second rotating groove 1011 are spaced apart and disposed opposite to each other in the X-axis direction. The first rotating groove 1010 is located at the rear side of the first fitting groove 101. That is, the first rotating groove 1010 is located at a side of the first fitting groove 101 away from the third fitting groove 108. Wherein, the first rotating groove 1010 is spaced apart from the first engaging groove 101. The first rotating groove 1010 includes two groove side walls (not shown) spaced apart and disposed opposite each other in the Y-axis direction. Wherein, each groove sidewall of the first rotating groove 1010 is provided with a mounting hole 1012. Illustratively, the mounting holes 1012 are circular holes, the axes of the mounting holes of the two slot side walls are all parallel to the Y-axis direction, and the mounting holes of the two slot side walls are coaxial.

The second rotating groove 1011 has the same structure as the first rotating groove 1010. The second rotating groove 1011 is located at the rear side of the second fitting groove 102. That is, the second rotating groove 1011 is located at a side of the second fitting groove 102 remote from the fourth fitting groove 109. Wherein the second rotating groove 1011 is spaced apart from the second fitting groove 105. The second rotating groove 1011 includes two groove side walls (not shown) which are spaced apart and disposed opposite each other in the Y-axis direction. Wherein each groove sidewall of the second rotating groove 1011 is provided with a mounting hole 1013. Illustratively, the mounting holes 1013 are circular holes, the axes of the mounting holes of the two slot side walls are both parallel to the Y-axis direction, and the mounting holes of the two slot side walls are concentric.

Referring to fig. 36 and 37, fig. 36 is a schematic structural view of the connecting assembly 20 in the foldable mechanism 130 shown in fig. 34, and fig. 37 is a schematic structural view of the connecting assembly 20 shown in fig. 36 at another angle.

The first fixing frame 21 is provided with a receiving notch 211 and a guiding chute 218. The structure of the accommodating notch 211 may refer to the related description of the accommodating notch 211 in the first fixing frame 21 in the first embodiment, which is not described herein. The opening of the guide chute 218 is located on the top surface (not shown) of the first fixing frame 21. The guide chute 218 is recessed from the top surface of the first holder 21 toward the bottom surface (not shown) in the negative Z-axis direction, and penetrates the rear end surface (not shown) of the first holder 21 and the bottom wall surface (not shown) of the receiving recess 211. Wherein the guiding chute 218 is an arc-shaped slot. That is, the groove top wall surface (not shown) and the groove bottom wall surface (not shown) of the guide chute 218 are both arc-shaped surfaces.

The first holder 21 is provided with a sliding portion 219, and the sliding portion 219 is provided on a front end surface (not shown) of the first holder 21 and extends from the front end surface of the first holder 21 in a direction away from the rear end surface (in the negative Y-axis direction shown). Illustratively, the slider 219 is square-shaft shaped. In other embodiments, the sliding portion 219 may also have an arcuate plate shape or other contoured shaft shape.

Referring to fig. 35, the structure of the first main swing arm 23 is matched with the structure of the first matching groove 101. The first main swing arm 23 includes a sliding portion 232 and a connecting portion 233, and the connecting portion 233 is fixedly connected between the sliding portion 232 and the first fixing frame 21. The sliding portion 232 and the connecting portion 233 may be integrally formed with the first fixing frame 21 to increase the assembling stability of the connecting assembly 20.

The sliding portion 232 has a structure that is adapted to the structure of the arc-shaped groove portion in the first fitting groove 101. Illustratively, the sliding portion 232 has a circular shaft shape, and the axis of the sliding portion 232 is parallel to the Y-axis direction. Specifically, the sliding portion 232 is mounted on the arc-shaped slot portion of the first mating slot 101, and can rotate relative to the base 10 in the first mating slot 101, so as to realize rotational connection between the sliding portion 232 and the base 10, thereby realizing rotational connection between the first main swing arm 23 and the base 10, and further realizing rotational connection between the first fixing frame 21 and the base 10.

In the process of rotating the first fixing frame 21 and the first main swing arm 23 relative to the base 10, there are two cases that the first main swing arm 23 performs real axis rotation relative to the base 10 and the first main swing arm 23 performs virtual axis rotation relative to the base 10. When the first main swing arm 23 performs a real-axis rotation with respect to the base 10, the sliding portion 232 performs a real-axis rotation with respect to the base 10, and the sliding portion 232 can rotate with respect to the base 10 in the first engagement groove 101, and the pin 236 of the sliding portion 232 is always located at the rotational position of the first engagement groove 101. The rotation center of the first main swing arm 23 relative to the base 10 is a second center, and the second center is the axis of the sliding portion 232.

When the first main swing arm 23 rotates about an imaginary axis relative to the base 10, the sliding portion 232 can slide and rotate relative to the base 10 in the first engaging groove 101, and the pin 236 of the sliding portion 232 can slide between the rotated position and the folded position of the first engaging groove 101. In the virtual rotation stage, the rotation center of the first main swing arm 23 relative to the base 10 is a first center, and the first center is the axis of the arc-shaped groove part in the first matching groove 101 and is spaced from the second center.

Referring to fig. 36 and 37, the first auxiliary swing arm 25 includes a sliding portion 251, a rotating portion 252, and a connecting portion 253, and the connecting portion 253 is fixedly connected between the sliding portion 251 and the rotating portion 252. Wherein, the sliding portion 251, the connecting portion 253, and the rotating portion 252 may be integrally formed.

The sliding portion 251 is provided with a chute 254, and an opening of the chute 254 is located at a rear end face (not shown) of the sliding portion 251. The slide groove 254 is recessed from the rear end surface of the slide portion 251 in the direction of the front end surface (not shown) thereof (in the negative Y-axis direction shown), and penetrates the front end surface of the slide portion 251. Illustratively, the chute 254 is an arc chute, and both the top and bottom wall surfaces of the chute 254 are arc surfaces, with the axis of the chute 254 being parallel to the Y-axis direction. In other embodiments, the chute 254 may not extend through the front face of the slider 251.

Wherein the chute 254 has a first position and a second position, the second position of the chute 254 is located outside the first position of the chute 254. In this embodiment, the first position of the chute 254 is located at the innermost side of the chute 254, and the second position of the chute 254 is located at the outermost side of the chute 254. In other embodiments, the first position of the chute 254 may be located elsewhere in the chute 254 and/or the second position of the chute 254 may be located elsewhere in the chute 254.

The structure of the chute 254 is adapted to the structure of the sliding portion 219 of the first fixing frame 21. Specifically, the sliding portion 219 of the first fixing frame 21 is mounted on the sliding chute 254, and can slide and rotate relative to the sliding portion 251 of the first auxiliary swing arm 25 in the sliding chute 254, so as to realize sliding and rotating connection between the first fixing frame 21 and the sliding portion 251 of the first auxiliary swing arm 25, and further realize sliding and rotating connection between the first fixing frame 21 and the first auxiliary swing arm 25.

In other embodiments, the sliding portion 251 of the first auxiliary swing arm 25 may be square, the first fixing frame 21 is provided with a sliding slot, the sliding portion 251 of the first auxiliary swing arm 25 is disposed through the sliding slot of the first fixing frame 21, and slides in the sliding slot of the first fixing frame 21 relative to the first fixing frame 21, so as to realize sliding connection between the sliding portion 251 of the first auxiliary swing arm 25 and the first fixing frame 21. At this time, the sliding groove of the first fixing frame 21 has a switching position and a folding position, and the folding position of the sliding groove in the first fixing frame 21 is located inside the switching position of the sliding groove in the first fixing frame 21. Illustratively, the folding position of the sliding groove in the first fixing frame 21 is located at the innermost side of the sliding hole in the first fixing frame 21, and the switching position of the sliding groove in the first fixing frame 21 is located at the outermost side of the sliding groove in the first fixing frame 21.

Referring to fig. 35, the rotating portion 252 is in a circular shaft shape, and the structure of the rotating portion 252 is adapted to the structure of the third matching groove 108. Opposite ends of the rotating part 252 are respectively installed in two installation holes on the side wall of the third matching groove 108, and the rotating part 252 can rotate relative to the base 10 in the third matching groove 108 so as to realize the rotating connection between the rotating part 252 and the base 10 and further realize the rotating connection between the first auxiliary swing arm 25 and the base 10. Wherein the rotation center of the rotation portion 252 relative to the base 10 coincides with the second center. That is, the rotation center of the first sub-swing arm 25 with respect to the base 10 coincides with the second center.

Referring to fig. 36 and 37, the second fixing frame 22 is provided with a receiving notch 221 and a guiding chute 228. In this embodiment, the structures of the receiving notch 221 and the guiding chute 228 can be referred to the related descriptions of the receiving notch 211 and the guiding chute 218 in the first fixing frame 21, and are not described herein again. Further, the second holder 22 is provided with a sliding portion 229. The structure of the sliding portion 229 may refer to the related description of the sliding portion 219 in the first fixing frame 21, which is not described herein.

Referring to fig. 36, the structure of the second main swing arm 24 is matched with the structure of the second matching groove 102. The second main swing arm 24 includes a sliding portion 242 and a connecting portion 243, and the connecting portion 243 is fixedly connected between the sliding portion 242 and the second fixing frame 22. The structure of the second main swing arm 24, the matching relationship between the second main swing arm 24 and the second fixing frame 22, and the matching relationship between the second main swing arm 24 and the base 10 can be described with reference to the first main swing arm 23.

The structure of the sliding portion 242 is adapted to the structure of the arc-shaped groove portion in the second fitting groove 102. Illustratively, the sliding portion 242 has a circular shaft shape, and the axis of the sliding portion 242 is parallel to the Y-axis direction. Specifically, the sliding portion 242 is mounted on the arc-shaped slot portion of the second mating slot 102, and can rotate relative to the base 10 in the second mating slot 102, so as to implement a rotational connection between the sliding portion 242 and the base 10, thereby implementing a rotational connection between the second main swing arm 24 and the base 10, and further implementing a rotational connection between the second fixing frame 22 and the base 10.

In the process of rotating the second fixing frame 22 and the second main swing arm 24 relative to the base 10, there are two situations that the second main swing arm 24 performs real axis rotation relative to the base 10 and the second main swing arm 24 performs virtual axis rotation relative to the base 10. When the second main swing arm 24 performs a real-axis rotation relative to the base 10, the sliding portion 242 performs a real-axis rotation relative to the base 10, and the sliding portion 242 may rotate relative to the base 10 in the second engagement slot 102, and the pin 246 of the sliding portion 242 is always located at the rotation position of the second engagement slot 102. The rotation center of the second main swing arm 24 with respect to the base 10 is a fourth center, and the fourth center is the axis of the sliding portion 242.

When the second main swing arm 24 rotates about the virtual axis relative to the base 10, the sliding portion 242 can slide and rotate relative to the base 10 in the second matching slot 102, and the pin 246 of the sliding portion 242 can slide between the rotated position and the folded position of the second matching slot 102. In the virtual rotation stage, the rotation center of the second main swing arm 24 relative to the base 10 is a third center, and the third center is the axis of the arc-shaped slot portion in the second matching slot 102 and is spaced from the fourth center.

Referring to fig. 36 and 37, the second sub-swing arm 26 includes a sliding portion 261, a rotating portion 262, and a connecting portion 263, and the connecting portion 263 is fixedly connected between the sliding portion 261 and the rotating portion 262. The structure of the second auxiliary swing arm 26, the matching relationship between the second auxiliary swing arm 26 and the second fixing frame 22, and the matching relationship between the second auxiliary swing arm 26 and the base 10 can be described with reference to the first auxiliary swing arm 25.

The structure of the sliding groove 264 of the sliding portion 261 is adapted to the structure of the sliding portion 229 of the second fixing frame 22. Specifically, the sliding portion 229 of the second fixing frame 22 is mounted on the sliding groove 264, and can slide and rotate relative to the sliding portion 261 of the second auxiliary swing arm 26 in the sliding groove 264, so as to realize sliding and rotating connection between the second fixing frame 22 and the sliding portion 261 of the second auxiliary swing arm 26, and further realize sliding and rotating connection between the second fixing frame 22 and the second auxiliary swing arm 26.

Referring to fig. 35, the rotating portion 262 is in a circular shaft shape, and the structure of the rotating portion 262 is adapted to the structure of the fourth matching groove 109. Opposite ends of the rotating portion 262 are respectively mounted in two mounting holes 1091 on the side wall of the fourth matching groove 109, and the rotating portion 262 can rotate relative to the base 10 in the fourth matching groove 109, so as to realize rotational connection between the rotating portion 262 and the base 10, and further realize rotational connection between the second auxiliary swing arm 26 and the base 10. Wherein the rotation center of the rotation portion 262 relative to the base 10 coincides with the fourth center. That is, the rotation center of the second sub-swing arm 26 with respect to the base 10 coincides with the fourth center.

In the connecting assembly 20 shown in this embodiment, when the first fixing frame 21 rotates relative to the base 10, the first fixing frame 21 drives the first main swing arm 23 to rotate relative to the base 10, the first fixing frame 21 drives the first auxiliary swing arm 25 to slide and rotate relative to the first fixing frame 21 and also rotate relative to the base 10, and when the second fixing frame 22 rotates relative to the base 10, the second fixing frame 22 drives the second main swing arm 24 to rotate relative to the base 10, and the second fixing frame 22 also drives the second auxiliary swing arm 26 to slide and rotate relative to the second fixing frame 22 and also rotate relative to the base 10.

Referring to fig. 38 and 39, fig. 38 is a schematic cross-sectional structure of the foldable mechanism 130 shown in fig. 33 taken along V-V, and fig. 39 is a schematic cross-sectional structure of the foldable mechanism 130 shown in fig. 33 taken along VI-VI.

When the foldable mechanism 130 is in the flattened state, the connecting assembly 20 is in the flattened state, the first fixing frame 21 and the second fixing frame 22 are respectively located on two opposite sides of the base 10, the top surface of the first fixing frame 21 and the top surface of the second fixing frame 22 are flush, the first main swing arm 23 and the second main swing arm 24 are relatively flattened, and the first auxiliary swing arm 25 and the second auxiliary swing arm 26 are relatively flattened. The sliding portion 219 of the first fixing frame 21 is located at a first position of the sliding groove 254 in the first auxiliary swing arm 25, the sliding portion 229 of the second fixing frame 22 is located at a first position of the sliding groove 264 in the second auxiliary swing arm 26, the sliding portion 232 of the first main swing arm 23 is located at a rotating position of the first matching groove 101, and the sliding portion 242 of the second main swing arm 24 is located at a rotating position of the second matching groove 102.

Referring to fig. 40 and 41, fig. 40 is a schematic structural view of the foldable mechanism 130 shown in fig. 38 in a folded state, and fig. 41 is a schematic structural view of the foldable mechanism 130 shown in fig. 39 in a folded state.

When the foldable mechanism 130 is in the folded state, the connecting assembly 20 is in the folded state, the first fixing frame 21 and the second fixing frame 22 are arranged at intervals and are opposite to each other, the first main swing arm 23 and the second main swing arm 24 are arranged at intervals and are opposite to each other, and the first auxiliary swing arm 25 and the second auxiliary swing arm 26 are arranged at intervals and are opposite to each other. The sliding portion 219 of the first fixing frame 21 is located at the second position of the sliding groove 254 in the first auxiliary swing arm 25, the sliding portion 229 of the second fixing frame 22 is located at the second position of the sliding groove 264 in the second auxiliary swing arm 26, the sliding portion 232 of the first main swing arm 23 is located at the folding position of the first matching groove 101, and the sliding portion 242 of the second main swing arm 24 is located at the folding position of the second matching groove 102.

Referring to fig. 42 and 43, fig. 42 is a schematic structural view of the foldable mechanism 130 shown in fig. 38 in a semi-folded state, and fig. 43 is a schematic structural view of the foldable mechanism 130 shown in fig. 39 in a semi-folded state.

Wherein, the connecting assembly 20 is in a semi-folded state, the sliding portion 219 of the first fixing frame 21 is located at the first position of the sliding groove 254 in the first auxiliary swing arm 25, the sliding portion 229 of the second fixing frame 22 is located at the first position of the sliding groove 264 in the second auxiliary swing arm 26, the sliding portion 232 of the first main swing arm 23 is located at the rotating position of the first mating groove 101, and the sliding portion 242 of the second main swing arm 24 is located at the rotating position of the second mating groove 102.

It should be noted that, in the embodiment of the present application, the switching process of the foldable mechanism 130 from the unfolded state to the folded state and from the folded state to the unfolded state includes a real axis rotation stage and an imaginary axis rotation stage. In the real-axis rotation stage, the first main swing arm 23 and the second main swing arm 24 each perform real-axis rotation of the base 10. In the virtual axis rotation stage, the first main swing arm 23 and the second main swing arm 24 each perform virtual axis rotation with respect to the base 10.

In the present embodiment, during the process of switching the foldable mechanism 130 from the flattened state to the folded state, the real axis rotation stage is performed first, and then the imaginary axis rotation stage is performed.

As shown in fig. 38, 39, 42 and 43, in the solid axis rotation stage, the first fixing frame 21 rotates around the counterclockwise direction relative to the base 10, the first fixing frame 21 not only drives the first main swing arm 23 to rotate relative to the base 10, but also drives the first auxiliary swing arm 25 to rotate relative to the base 10, and the sliding portion 232 of the first main swing arm 23 is always located at the rotation position of the first matching groove 101, and the sliding portion 219 of the first fixing frame 21 is always located at the first position of the sliding groove 254 in the first auxiliary swing arm 25. The second fixing frame 22 rotates clockwise relative to the base 10, the second fixing frame 22 not only drives the second main swing arm 24 to rotate relative to the base 10, the sliding part 242 of the second main swing arm 24 is always located at the rotating position of the second matching groove 102, the second fixing frame 22 also drives the second auxiliary swing arm 26 to rotate relative to the base 10, and the sliding part 229 of the second fixing frame 22 is always located at the first position of the sliding groove 264 in the second auxiliary swing arm 26. Wherein, there is no relative movement between the first fixing frame 21 and the first auxiliary swing arm 25, and there is no relative movement between the second fixing frame 22 and the second auxiliary swing arm 26. That is, in other words, the first mount 21 and the first sub-swing arm 25 are relatively stationary, and the second mount 22 and the second sub-swing arm 26 are relatively stationary.

As shown in fig. 40, 41, 42 and 43, in the virtual axis rotation stage, the first fixing frame 21 continues to rotate around the counterclockwise direction relative to the base 10, the first fixing frame 21 drives the first main swing arm 23 to slide and rotate relative to the base 10, the sliding portion 232 of the first main swing arm 23 slides from the rotation position of the first matching slot 101 to the folding position, the first fixing frame 21 also drives the first auxiliary swing arm 25 to slide and rotate not only relative to the first fixing frame 21 but also relative to the base 10, and the sliding portion 219 of the first fixing frame 21 slides from the first position of the sliding slot 254 to the folding position. The second fixing frame 22 continues to rotate clockwise relative to the base 10, the second fixing frame 22 drives the second main swing arm 24 to slide and rotate relative to the base 10, the sliding portion 242 of the second main swing arm 24 slides from the rotating position of the second matching groove 102 to the folding position, the second fixing frame 22 also drives the second auxiliary swing arm 26 to slide and rotate relative to the second fixing frame 22 and rotate relative to the base 10, and the sliding portion 229 of the second fixing frame 22 slides from the first position of the sliding groove 264 to the folding position.

In contrast, in the process of switching the foldable mechanism 130 from the folded state to the flattened position, the virtual axis rotation stage is performed first, and then the real axis rotation stage is performed.

As shown in fig. 40, 41, 42 and 43, in the virtual axis rotation stage, the first fixing frame 21 rotates clockwise relative to the base 10, the first fixing frame 21 drives the first main swing arm 23 to slide and rotate relative to the base 10, the sliding portion 232 of the first main swing arm 23 slides from the folded position of the first matching slot 101 to the rotated position, the first fixing frame 21 also drives the first auxiliary swing arm 25 to slide and rotate not only relative to the first fixing frame 21 but also relative to the base 10, and the sliding portion 219 of the first fixing frame 21 slides from the second position of the chute 254 to the switching position. The second fixing frame 22 rotates around the counterclockwise direction relative to the base 10, the second fixing frame 22 drives the second main swing arm 24 to slide and rotate relative to the base 10, the sliding portion 242 of the second main swing arm 24 slides from the folded position of the second matching groove 102 to the rotated position, the second fixing frame 22 also drives the second auxiliary swing arm 26 to slide and rotate relative to the second fixing frame 22, and also rotates relative to the base 10, and the sliding portion 229 of the second fixing frame 22 slides from the second position of the chute 264 to the switching position.

As shown in fig. 38, 39, 42 and 43, in the solid axis rotation stage, the first fixing frame 21 continues to rotate clockwise relative to the base 10, the first fixing frame 21 not only drives the first main swing arm 23 to rotate relative to the base 10, but also drives the first auxiliary swing arm 25 to rotate relative to the base 10, and the sliding portion 232 of the first main swing arm 23 is always located at the rotation position of the first matching groove 101, and the sliding portion 219 of the first fixing frame 21 is always located at the first position of the sliding groove 254 in the first auxiliary swing arm 25. The second fixing frame 22 continuously rotates around the anticlockwise direction relative to the base 10, the second fixing frame 22 not only drives the second main swing arm 24 to rotate relative to the base 10, the sliding part 242 of the second main swing arm 24 is always located at the rotating position of the second matching groove 102, the second fixing frame 22 also drives the second auxiliary swing arm 26 to rotate relative to the base 10, and the sliding part 229 of the second fixing frame 22 is always located at the first position of the sliding groove 264 in the second auxiliary swing arm 26. Wherein, there is no relative movement between the first fixing frame 21 and the first auxiliary swing arm 25, and there is no relative movement between the second fixing frame 22 and the second auxiliary swing arm 26.

In the process of switching between the folded state and the unfolded state of the foldable mechanism 130, when the first main swing arm 23 and the second main swing arm 24 rotate relative to the base 10, two conditions of real-axis rotation and virtual-axis rotation exist, and the rotation centers of the first main swing arm 23 and the second main swing arm 24 relative to the base 10 are different in the two conditions. In other words, the movement track of the first main swing arm 23 and the second main swing arm 24 in the state switching process is changed, that is, the movement track of the first fixing frame 21 and the second fixing frame 22 in the state switching process is changed, so that the rotation centers of the real axis rotation stage and the virtual axis rotation stage can be designed pertinently, the design freedom degree of the foldable mechanism 130 in the state switching process is improved, the stress state of the display screen 200 in the state switching process of the foldable terminal 1000 is improved, and the problems of crease, invert and the like, which are easily generated by the display screen 200, are solved.

Referring to fig. 44 and 45, fig. 44 is a schematic view of the platen assembly 40 in the foldable mechanism 130 shown in fig. 34, and fig. 45 is a schematic view of the platen assembly 40 shown in fig. 44 at another angle.

The first pressing plate 41 includes a supporting portion 411 and a guiding portion 413, and the guiding portion 413 is fixedly connected to the supporting portion 411. In this embodiment, the structures of the supporting portion 411 and the guiding portion 413 can be referred to the related descriptions of the supporting portion 411 and the guiding portion 413 of the first pressing plate 41 in the second embodiment, which are not described herein. The sliding hole 417 of the supporting portion 411 also penetrates a top surface (not shown) of the supporting portion 411. The guide part 413 has one, and the guide part 413 has an arc plate shape. In other embodiments, the sliding hole 417 of the supporting portion 411 may not extend through the top surface of the supporting portion 411, and/or the guiding portion 413 may be plural.

The first platen swing arm 43 includes a sliding portion 431, a rotating portion 432, and a connecting portion 433, and the connecting portion 433 is fixedly connected between the sliding portion 431 and the rotating portion 432. The structure of the first platen swing arm 43 and the matching relationship between the first platen swing arm 43 and the first platen 41 may refer to the related description of the first platen swing arm 43 in the second embodiment, which is not described herein.

The structure of the sliding portion 431 is adapted to the structure of the sliding hole 417 in the first pressing plate 41. The sliding portion 431 is disposed through the sliding hole 417 of the first pressing plate 41, and is capable of sliding relative to the first pressing plate 41 in the sliding hole 417 of the first pressing plate 41, so as to realize sliding connection between the sliding portion 431 and the first pressing plate 41, and further realize sliding connection between the first pressing plate swing arm 43 and the first pressing plate 41.

Referring to fig. 35, the structure of the rotating portion 432 is adapted to the structure of the first rotating groove 1010. Illustratively, the rotating portion 432 has a circular shaft shape, and the axis of the rotating portion 432 is parallel to the Y-axis direction. Specifically, opposite ends of the rotating portion 432 are respectively mounted in mounting holes 1012 on two side walls of the first rotating slot 1010, and the rotating portion 432 can rotate in the first rotating slot 1010 relative to the base 10, so as to realize rotational connection between the rotating portion 432 and the base 10, and further realize rotational connection between the first pressing plate swing arm 43 and the base 10.

The second pressing plate 42 includes a supporting portion 421 and a guiding portion 423, and the guiding portion 423 is fixedly connected to the supporting portion 421. In the present embodiment, the structures of the supporting portion 421 and the guiding portion 423 can be referred to the above description of the supporting portion 411 and the guiding portion 413 in the first platen 41. Wherein, the sliding hole 427 of the supporting portion 421 also penetrates the top surface of the supporting portion 421.

The second platen swing arm 44 includes a sliding portion 441, a rotating portion 442, and a connecting portion 443, and the connecting portion 443 is fixedly connected between the sliding portion 441 and the rotating portion 442. The structure of the second platen swing arm 44, the matching relationship between the second platen swing arm 44 and the second platen 42, and the matching relationship between the second platen swing arm 44 and the base 10 can be described with reference to the first platen swing arm 43.

The structure of the sliding portion 441 is adapted to the structure of the sliding hole 427 in the second pressing plate 42. The sliding portion 441 is disposed through the sliding hole 427 of the second pressing plate 42, and is capable of sliding in the sliding hole 427 of the second pressing plate 42 relative to the second pressing plate 42, so as to realize sliding connection between the sliding portion 441 and the second pressing plate 42, and further realize sliding connection between the second pressing plate swing arm 44 and the second pressing plate 42.

Referring to fig. 35, the structure of the rotating portion 442 is adapted to the structure of the second rotating slot 1011. Specifically, opposite ends of the rotating portion 442 are respectively mounted in the mounting holes 1013 on the side walls of two grooves in the second rotating groove 1011, and the rotating portion 442 can rotate in the second rotating groove 1011 relative to the base 10, so as to realize the rotational connection between the rotating portion 442 and the base 10, and further realize the rotational connection between the second pressing plate swing arm 44 and the base 10.

Referring to fig. 36, 37, 44 and 45, in the first pressing plate 41, a portion of the supporting portion 411 is accommodated in the accommodating notch 211 of the first fixing frame 21, and the guiding portion 413 is mounted in the guiding chute 218 of the first fixing frame 21 and can slide and rotate relative to the first fixing frame 21 in the guiding chute 218, so as to realize sliding and rotating connection between the guiding portion 413 and the first fixing frame 21, and further realize sliding and rotating connection between the first pressing plate 41 and the first fixing frame 21.

In the second pressing plate 42, a part of the supporting portion 421 is accommodated in the accommodating notch 221 of the second fixing frame 22, and the guiding portion 423 of the second pressing plate 42 is mounted on the guiding chute 228 of the second fixing frame 22 and can slide and rotate relative to the second fixing frame 22 in the guiding chute 228, so as to realize sliding and rotating connection between the guiding portion 423 and the second fixing frame 22, and further realize sliding and rotating connection between the second pressing plate 42 and the second fixing frame 22.

When the first fixing frame 21 rotates relative to the base 10, the first fixing frame 21 drives the first pressing plate 41 to slide and rotate relative to the first fixing frame 21, and also rotate relative to the base 10, and the first pressing plate 41 drives the first pressing plate swing arm 41 to slide and rotate relative to the first pressing plate 41, and also rotate relative to the base 10. Similarly, when the second fixing frame 22 rotates relative to the base 10, the second fixing frame 22 drives the second pressing plate 42 to slide and rotate relative to the second fixing frame 22, and also rotates relative to the base 10, and the second pressing plate 42 drives the second pressing plate swing arm 42 to slide and rotate relative to the second pressing plate 42, and also rotates relative to the base 10.

As shown in fig. 38 and 39, when the foldable mechanism 130 is in the flattened state, the platen assembly 40 is in the flattened state, the first platen 41 and the second platen 42 are located on opposite sides of the base 10 and are relatively flattened, and the first platen swing arm 43 and the second platen swing arm 44 are relatively flattened. Wherein the top surface of the first pressing plate 41 (i.e., the top surface of the supporting portion 411) and the top surface of the second pressing plate 42 (i.e., the top surface of the supporting portion 421) are flush. At this time, the top surface of the first pressing plate 41 is flush with the top surface of the first fixing frame 21, the top surface of the second pressing plate 42 is flush with the top surface of the second fixing frame 22, and the top surface of the base 10, the top surface of the first fixing frame 21, the top surface of the second fixing frame 22, the top surface of the first pressing plate 41, and the top surface of the second pressing plate 42 together form a supporting surface 1302.

As shown in fig. 40 and 41, when the foldable mechanism 130 is in the folded state, the platen assembly 40 is in the folded state, the first platen 41 and the second platen 42 are relatively folded, and the first platen swing arm 43 and the second platen swing arm 44 are relatively folded. At this time, the base 10, the connection assembly 20, and the pressing plate assembly 40 enclose to form the escape space 1303. The cross section of the avoiding space 1303 is in a shape of a droplet.

Referring to fig. 46 and 47, fig. 46 is a schematic cross-sectional structure of a third foldable terminal 1000 according to an embodiment of the present application in a flattened state, and fig. 47 is a schematic structure of the foldable terminal 1000 shown in fig. 46 in a folded state. Of these, fig. 46 and 47 show only the foldable mechanism 130 and the foldable portion 230 of the display screen 200.

As shown in fig. 46, when foldable terminal 1000 is in a flattened state, a support surface 1302 of foldable mechanism 130 can support foldable portion 230 of display screen 200 to ensure a good display of display screen 200. The supporting surface 1302 may be flush with the top surface of the first housing 110 and the top surface of the second housing 120, so that the foldable mechanism 130 may support the display screen 200 together with the first housing 110 and the second housing 120, so as to effectively support the display screen 200 by the foldable device (not shown) in a flattened state.

As shown in fig. 47, when foldable terminal 1000 is in the folded state, foldable portion 230 of display screen 200 is positioned inside foldable mechanism 130. Specifically, the foldable portion 230 is positioned within the escape space 1303. Wherein the foldable portion 230 is "drop-shaped". At this time, the avoidance space 1303 of the foldable mechanism 130 may avoid the R angle formed when the foldable portion 230 is bent, so that the foldable portion 230 is not bent at a larger angle, thereby avoiding bad sites such as folds generated in the display screen 200, and helping to prolong the service life of the display screen 200.

When the foldable terminal 1000 in the embodiment is switched between the folded state and the unfolded state, the movement process of the foldable mechanism 130 includes a real axis movement stage and a virtual axis movement stage, the first main swing arm 23 and the second main swing arm 24 are different in the two stages relative to the rotation center of the base 10, and accordingly, the first fixing frame 21 and the second fixing frame 22 are also different in the two stages relative to the rotation center of the base 10, so that the movement track of the display screen 200 in the folding and unfolding processes is changed, the degree of freedom of the movement track of the display screen 200 is improved, the stress state of the display screen 200 in the movement process is improved, the problems of crease and inverted arch generated by the display screen 200 can be solved, the service life of the display screen 200 can be prolonged, the reliability of the foldable terminal 1000 can be ensured, and the foldable part 230 of the display screen 200 can be prevented from being in a ' water drop ' shape ' when the foldable terminal 1000 is in the folded state, and interference between the foldable part 230 and the foldable mechanism 130 can be avoided.

The foregoing description is merely illustrative of the present application, and the scope of the present application is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the technical scope of the present application, and should be covered by the scope of the present application; embodiments of the application and features of the embodiments may be combined with each other without conflict. Therefore, the protection scope of the application is subject to the protection scope of the claims.

Claims

1. The foldable mechanism is characterized by comprising a base, a first fixing frame and a first main swing arm, wherein the first fixing frame is positioned on one side of the base, and the first main swing arm is connected between the base and the first fixing frame;

the folding mechanism comprises a folding mechanism and a folding mechanism, wherein the folding mechanism is switched between a folding state and an unfolding state and comprises a virtual axis rotating stage and a real axis rotating stage;

in the virtual axis rotation stage, the sliding part of the first main swing arm slides and rotates relative to the base, and the sliding part of the first main swing arm is a first center relative to the rotation center of the base;

in the solid shaft rotation stage, the sliding part of the first main swing arm rotates relative to the base, the sliding part of the first main swing arm is a second center relative to the rotation center of the base, and the second center is arranged at intervals with the first center.

2. The foldable mechanism of claim 1, wherein the sliding portion of the first main swing arm is located between the left side surface of the base and the right side surface of the base when the foldable mechanism is in the folded state.

3. The folding mechanism according to claim 1 or 2, wherein the virtual axis rotation phase is performed before the real axis rotation phase in the process of switching the folding mechanism from the unfolded state to the folded state;

and in the process of switching the foldable mechanism from the folded state to the unfolded state, the real shaft rotating stage is performed first, and then the virtual shaft rotating stage is performed.

4. A foldable mechanism according to claim 3, wherein the rotating portion of the first main swing arm is rotatably connected to the first fixing frame, or the connecting portion of the first main swing arm is fixedly connected to the first fixing frame.

5. The folding mechanism according to claim 3 or 4, wherein the base is provided with a first fitting groove having a flattened position and a switching position, the flattened position being located inside the switching position, the sliding portion of the first main swing arm being mounted to the first fitting groove;

In the virtual axis rotation stage, the sliding part of the first main swing arm slides between the flattening position and the switching position;

in the solid shaft rotation stage, the sliding part of the first main swing arm is positioned at the switching position.

6. The folding mechanism of claim 5, wherein the base is provided with a first avoidance groove, and an opening of the first avoidance groove is positioned on a groove bottom wall surface of the first matching groove;

when the foldable mechanism is in the folded state, the first avoiding groove is away from the sliding part of the first main swing arm.

7. The folding mechanism according to claim 1 or 2, wherein the real axis rotation phase is performed before the imaginary axis rotation phase in the process of switching the folding mechanism from the unfolded state to the folded state;

and in the process of switching the foldable mechanism from the folded state to the unfolded state, the virtual shaft rotating stage is performed first, and then the real shaft rotating stage is performed.

8. The folding mechanism of claim 7, wherein the connection portion of the first main swing arm is fixedly connected to the first fixed frame, the folding mechanism further comprises a first auxiliary swing arm, the sliding portion of the first auxiliary swing arm slides and is rotationally connected to the first fixed frame, the rotating portion of the first auxiliary swing arm is rotationally connected to the base, and the rotating portion of the first auxiliary swing arm coincides with the second center relative to the rotation center of the base;

In the virtual axis rotation stage, the rotation part of the first auxiliary swing arm rotates relative to the base, and the sliding part of the first auxiliary swing arm slides and rotates relative to the first fixing frame;

in the solid shaft rotation stage, the rotation part of the first auxiliary swing arm rotates relative to the base, and the sliding part of the first auxiliary swing arm and the first fixing frame are relatively static.

9. The folding mechanism of claim 7 or 8, wherein the sliding portion of the first auxiliary swing arm is provided with a chute having a first position and a second position, the first position being located inside the second position, the sliding portion of the first fixing frame being mounted to the chute;

in the virtual axis rotation stage, the sliding part of the first fixing frame slides between the first position and the second position;

in the solid shaft rotation stage, the sliding part of the first fixing frame is positioned at the first position.

10. The foldable mechanism according to any one of claims 7 to 9, wherein the base is provided with a first mating groove having a rotational position and a folded position, the rotational position being located inside the folded position, the sliding portion of the first main swing arm being mounted to the first mating groove;

In the virtual axis rotation stage, the sliding part of the first main swing arm slides between the rotation position and the folding position;

in the solid shaft rotation stage, the sliding part of the first main swing arm is positioned at the rotation position.

11. The foldable mechanism of any one of claims 1 to 10, further comprising a second mount located on one side of the base and a second main swing arm connected between the base and the second mount;

12. The folding mechanism of claim 11, wherein during the virtual axis rotation phase, the sliding portion of the second main swing arm slides and rotates relative to the base, and the sliding portion of the second main swing arm is a third center relative to the rotation center of the base;

In the solid shaft rotation stage, the sliding part of the second main swing arm rotates relative to the base, the sliding part of the second main swing arm is a fourth center relative to the rotation center of the base, and the fourth center and the third center are arranged at intervals.

13. A foldable terminal comprising a first housing, a second housing, and a foldable mechanism according to any one of claims 1 to 12, wherein the foldable mechanism connects the first housing and the second housing, and wherein the first mount is fixedly connected to the first housing.

14. The foldable terminal of claim 13, further comprising a display screen, the display screen further comprising a first display portion, a second display portion, and a foldable portion, the foldable portion being fixedly connected between the first display portion and the second display portion, the first display portion being mounted to the first housing, the second display portion being mounted to the second housing, the foldable portion being disposed opposite the foldable mechanism.