Foldable mechanism and foldable terminal

Abstract

The invention provides a foldable mechanism and a foldable terminal, which are used for improving the motion control precision of a swing arm on a door plate, improving the motion reliability of the door plate and ensuring the use reliability of the foldable mechanism. The first door plate is located on one side of the base. The first guide column and the second guide column are both located on the bottom side of the first plate body and fixedly connected with the first plate body, and the first guide column and the second guide column are oppositely arranged in a spaced mode. The first rotating part is rotationally connected with the base, the first sliding plate is fixedly connected to the first rotating part and provided with an unfolding position and a folding position, and the folding position of the first sliding plate is located on the outer side of the unfolding position of the first sliding plate. The first sliding plate is clamped between the first guide column and the second guide column and can slide and rotate relative to the first guide column and the second guide column. When the foldable mechanism is in an unfolded state, the unfolded position of the first sliding plate is clamped between the first guide column and the second guide column. When the foldable mechanism is in a folded state, the folding position of the first sliding plate is clamped between the first guide column and the second guide column.

Description

Technical Field

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

[0002] With the advancement of technology, the era of large-screen smart terminals has arrived. Foldable terminals are favored by users due to their large screens and easy portability. At present, foldable terminals often use foldable mechanisms to achieve folding and unfolding, and use the coordination between the swing arm and the door panel to control the movement of the door panel to support the display screen of the foldable terminal. However, when the foldable terminal switches between the unfolded state and the folded state, the swing arm does not accurately control the movement of the door panel, and the movement reliability of the door panel is poor, which affects the reliability of the foldable mechanism. Summary of the invention

[0003] The present application provides a foldable mechanism and a foldable terminal, which are used to improve the motion control accuracy of the swing arm on the door panel, enhance the motion reliability of the door panel, and ensure the use reliability of the foldable mechanism.

[0004] In a first aspect, the present application provides a foldable mechanism, including a base, a first door panel, and a first swing arm. The first door panel is located on one side of the base, and the first door panel includes a first plate body, a first guide column, and a second guide column. The first guide column and the second guide column are both located on the bottom side of the first plate body and are both fixedly connected to the first plate body. The first guide column and the second guide column are spaced apart and arranged opposite to each other. The first swing arm includes a first rotating portion and a first slide plate. The first rotating portion is rotatably connected to the base. The first slide plate is fixedly connected to the first rotating portion and has an unfolded position and a folded position. The folded position of the first slide plate is located outside the unfolded position of the first slide plate. The first slide plate is clamped between the first guide column and the second guide column, and can slide and rotate relative to the first guide column and the second guide column.

[0005] When the foldable mechanism is in the unfolded state, the unfolded position of the first slide plate is clamped between the first guide column and the second guide column.

[0006] When the foldable mechanism is in a folded state, the folded position of the first slide plate is clamped between the first guide post and the second guide post.

[0007] When the foldable mechanism shown in the present application is in the unfolded state, the first guide post and the second guide post clamp the unfolded position of the third sub-sliding part, and the action point of the first swing arm on the first door panel is far away from the rotation center of the first door panel. The first swing arm can more finely control the movement of the first door panel relative to the base, which helps to improve the movement reliability of the first door panel and ensure the reliability of the foldable mechanism. Furthermore, the structural design of the first guide post and the second guide post on the first door panel and the first slide plate on the first swing arm is simple, and the matching structure between the first guide post and the second guide post and the first slide plate is also simple. There is no need to design a complex structural matching between the first door panel and the first swing arm, which not only helps to reduce the cost of the foldable mechanism, but also makes the foldable mechanism easy to implement and apply.

[0008] In addition, the foldable mechanism is used in a foldable terminal, and when the foldable terminal is in the unfolded state, the point of action of the first swing arm on the first door panel is close to the base, which can reduce the torque borne by the first door panel due to the abutment of the connected circuit board, reduce the deformation of the first door panel caused by the torque, ensure the flatness of the first door panel, and effectively improve the flatness of the display screen and display effects such as light and shadow.

[0009] In one embodiment, the unfolded position of the first slide plate is also located on the top side of the folded position of the first slide plate.

[0010] When the foldable mechanism is in the unfolded state, the first slide plate of the first swing arm can press the first door panel downward under the action of gravity, thereby reducing the torque borne by the first door panel due to the upward abutment of the connected circuit board and reducing the deformation of the first door panel caused by the torque, thereby ensuring the flatness of the first door panel and effectively improving the flatness of the display screen and the display effects such as light and shadow.

[0011] In one embodiment, the first guide post has a first clamping surface facing the second guide post, and the second guide post has a second clamping surface facing the first guide post. Both the first clamping surface and the second clamping surface are arc-shaped surfaces to achieve sliding and rotating connection between the first guide post and the second guide post and the first slide plate.

[0012] The axes of the first clamping surface and the second clamping surface are both parallel to the folding direction of the foldable mechanism. Exemplarily, the radius of the first clamping surface is smaller than the radius of the second clamping surface.

[0013] In one embodiment, the foldable mechanism further includes a first fixing frame, and the first fixing frame is located on the bottom side of the first door panel.

[0014] The first swing arm also includes a first sliding portion, which includes a first sliding plate and is slidably connected to the first fixing frame.

[0015] The first swing arm can be used as the door panel swing arm of the door panel assembly and also as the auxiliary swing arm of the connecting assembly, so as to omit the auxiliary swing arm of the connecting assembly, simplify the structure of the foldable mechanism, and help to achieve a lightweight design of the foldable terminal.

[0016] The first fixing frame is provided with a first sliding hole, the first sliding part is passed through the first sliding hole, and can slide relative to the first fixing frame in the first sliding hole to achieve a sliding connection between the first sliding part and the first fixing frame, and further achieve a sliding connection between the first swing arm and the first fixing frame.

[0017] In one embodiment, the first sliding part also includes a first sub-sliding part and a second sub-sliding part. The first sub-sliding part and the second sub-sliding part are spaced apart and are both slidably connected to the first fixed frame. The first slide plate is fixedly connected to the side of the second sub-sliding part facing the first sub-sliding part and is spaced apart from the first sub-sliding part to avoid interference between the third slide plate and the first sliding part, thereby ensuring the matching stability between the first sliding part and the first fixed frame.

[0018] In one embodiment, the foldable mechanism further includes a second door panel and a second swing arm. The second door panel is located on one side of the base and is spaced apart from the first door panel. The second door panel includes a second plate body, a third guide post and a fourth guide post, the third guide post and the fourth guide post are both located on the bottom side of the second plate body and are fixedly connected to the second plate body, and the third guide post and the fourth guide post are spaced apart and arranged opposite to each other.

[0019] The second swing arm includes a second rotating part and a second slide plate, the second rotating part is rotatably connected to the base, the second slide plate has an unfolded position and a folded position, the folded position of the second slide plate is located outside the unfolded position of the second slide plate, the second slide plate is clamped between the third guide column and the fourth guide column, and can slide and rotate relative to the third guide column and the fourth guide column.

[0020] When the foldable mechanism is in the unfolded state, the unfolded position of the second slide plate is clamped between the third guide post and the fourth guide post.

[0021] When the foldable mechanism is in the folded state, the folded position of the second slide plate is clamped between the third guide post and the fourth guide post.

[0022] When the foldable mechanism shown in the present application is in the unfolded state, the third guide post and the fourth guide post clamp the unfolded position of the sixth sub-sliding part, and the action point of the second swing arm on the second door panel is far away from the rotation center of the second door panel. The second swing arm can control the movement of the second door panel more finely, which helps to improve the movement reliability of the second door panel and ensure the reliability of the foldable mechanism. Furthermore, the third guide post and the fourth guide post on the second door panel and the second slide plate on the second swing arm have simple structural designs, and the matching structure between the third guide post and the fourth guide post and the second slide plate is also simple. There is no need to design a complex structural matching between the second door panel and the second swing arm, which not only helps to reduce the cost of the foldable mechanism, but also makes the foldable mechanism easy to implement and apply.

[0023] In addition, when the foldable terminal is in the unfolded state, the point where the second swing arm acts on the second door panel is close to the base, which can reduce the torque borne by the second door panel and the deformation of the second door panel caused by the torque, thereby ensuring the flatness of the second door panel and effectively improving the flatness of the display screen and display effects such as light and shadow.

[0024] In one embodiment, the unfolded position of the second slide board is also located on the top side of the folded position of the second slide board.

[0025] When the foldable mechanism is in the unfolded state, the second slide plate of the second swing arm can press the second door panel downward under the action of gravity, thereby reducing the torque borne by the second door panel due to the upward abutment of the connected circuit board and reducing the deformation of the second door panel caused by the torque, thereby ensuring the flatness of the second door panel and effectively improving the flatness of the display screen and display effects such as light and shadow.

[0026] In one embodiment, the third guide post has a third clamping surface facing the fourth guide post, and the fourth guide post has a fourth clamping surface facing the third guide post. The third clamping surface and the fourth clamping surface are both arc-shaped surfaces to achieve sliding and rotating connection between the third guide post and the fourth guide post and the second slide plate.

[0027] The axes of the third clamping surface and the fourth clamping surface are both parallel to the folding direction of the foldable mechanism. Exemplarily, the radius of the third clamping surface is smaller than the radius of the fourth clamping surface.

[0028] In one embodiment, the foldable mechanism further includes a second fixing frame, and the second fixing frame is located on the bottom side of the second door panel.

[0029] The second swing arm also includes a second sliding portion, which includes a second sliding plate and is slidably connected to the second fixing frame.

[0030] The second swing arm can be used as the door panel swing arm of the door panel assembly and also as the auxiliary swing arm of the connecting assembly, so as to omit the auxiliary swing arm of the connecting assembly, simplify the structure of the foldable mechanism, and help to achieve a lightweight design of the foldable terminal.

[0031] The second fixing frame is provided with a second sliding hole, the second sliding part is passed through the second sliding hole, and can slide relative to the second fixing frame in the second sliding hole to achieve a sliding connection between the second sliding part and the second fixing frame, and further achieve a sliding connection between the second swing arm and the second fixing frame.

[0032] In one embodiment, the second sliding part also includes a third sub-sliding part and a fourth sub-sliding part, the third sub-sliding part and the fourth sub-sliding part are arranged at intervals and are both slidably connected to the second fixed frame, and the second slide plate is fixedly connected to the side of the fourth sub-sliding part facing the third sub-sliding part, and is arranged at intervals from the third sub-sliding part to avoid interference between the third slide plate and the second sliding part, thereby ensuring the matching stability between the second sliding part and the second fixed frame.

[0033] In one embodiment, the foldable mechanism further includes a support plate, and the support plate is mounted on the base.

[0034] When the foldable mechanism is in the unfolded state, the top surface of the first plate body, the top surface of the second plate body and the top surface of the support plate are flush to jointly support the foldable part of the display screen to ensure the flatness of the display screen and display effects such as light and shadow.

[0035] In one embodiment, when the foldable mechanism is in a folded state, the first door panel, the second door panel and the support panel enclose an avoidance space, and the cross-section of the avoidance space is "water drop-shaped" to better avoid the R angle formed when the foldable part is bent, thereby ensuring that the foldable part will not bend at a large angle, avoiding undesirable phenomena such as creases on the display screen, extending the service life of the display screen, and ensuring the reliability of the foldable terminal.

[0036] In one embodiment, the first plate body is provided with a third sliding hole, the third sliding hole has an unfolded position and a folded position, and the folded position of the third sliding hole is located inside the unfolded position of the third sliding hole.

[0037] The first swing arm also includes a first sliding shaft, which is fixedly connected to the first rotating part and spaced apart from the first sliding plate. The first sliding shaft is inserted into the third sliding hole and can slide relative to the first plate body in the third sliding hole.

[0038] When the foldable mechanism is in the unfolded state, the first sliding shaft is located at the unfolded position of the third sliding hole.

[0039] When the foldable mechanism is in the folded state, the first sliding shaft is located at the folded position of the third sliding hole.

[0040] In the foldable mechanism shown in the present application, a first guide post, a second guide post and a third sliding hole are designed on the first door panel, and the third sub-sliding portion on the first swing arm is cooperated with the first guide post and the second guide post, and the first sliding shaft on the first swing arm is cooperated with the third sliding hole to realize the sliding and rotating connection between the first door panel and the first swing arm, thereby ensuring the stability of the sliding and rotating connection between the first door panel and the first swing arm, improving the assembly stability of the door panel assembly, and thereby improving the reliability of the foldable mechanism.

[0041] In one embodiment, the second plate body is provided with a fourth sliding hole, the fourth sliding hole has an unfolded position and a folded position, and the folded position of the fourth sliding hole is located inside the unfolded position of the fourth sliding hole.

[0042] The second swing arm also includes a second sliding shaft, which is fixedly connected to the second rotating part and spaced apart from the second sliding plate. The second sliding shaft is inserted into the fourth sliding hole and can slide relative to the first plate body in the fourth sliding hole.

[0043] When the foldable mechanism is in the unfolded state, the second sliding shaft is located at the unfolded position of the fourth sliding hole.

[0044] When the foldable mechanism is in the folded state, the second sliding shaft is located at the folding position of the fourth sliding hole.

[0045] In the foldable mechanism shown in the present application, a third guide post, a fourth guide post and a fourth sliding hole are designed on the second door panel, and the sixth sub-sliding portion on the second swing arm is cooperated with the third guide post and the fourth guide post, and the second sliding shaft on the second swing arm is cooperated with the fourth sliding hole to realize the sliding and rotating connection between the second door panel and the second swing arm, thereby ensuring the stability of the sliding and rotating connection between the second door panel and the second swing arm, improving the assembly stability of the door panel assembly, and thereby improving the reliability of the foldable mechanism.

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

[0047] When the foldable terminal shown in the present application is in the unfolded state, the first guide post and the second guide post clamp the unfolded position of the third sub-sliding part, and the action point of the first swing arm on the first door panel is far away from the rotation center of the first door panel. The first swing arm can more finely control the movement of the first door panel relative to the base, which helps to improve the movement reliability of the first door panel and ensure the reliability of the use of the foldable terminal. Furthermore, the structural design of the first guide post and the second guide post on the first door panel and the first slide plate on the first swing arm is simple, and the matching structure between the first guide post and the second guide post and the first slide plate is also simple. There is no need to design a complex structural matching between the first door panel and the first swing arm, which not only helps to reduce the cost of the foldable terminal, but also makes the solution of the foldable terminal easy to implement and apply.

[0048] In addition, when the foldable terminal is in the unfolded state, the point where the first swing arm acts on the first door panel is close to the base, which can reduce the torque on the first door panel due to the abutment of the connected circuit board and reduce the deformation of the first door panel caused by the torque, thereby ensuring the flatness of the first door panel and effectively improving the flatness of the display screen and display effects such as light and shadow.

[0049] In one embodiment, the foldable terminal also includes a first circuit board, a second circuit board and a connecting circuit board. The first circuit board is arranged on the inner side of the first shell, the second circuit board is arranged on the inner side of the second shell, the connecting circuit board is passed through the inner side of the foldable mechanism, and is spaced apart from the first swing arm, and is electrically connected between the first circuit board and the second circuit board.

[0050] When the foldable terminal is in the unfolded state, the connecting circuit board will push up the ends of the first door panel and the second door panel close to the base. The cooperation between the first guide column and the second guide column on the first door panel and the first slide plate on the first swing arm, as well as the cooperation between the third guide column and the fourth guide column on the second door panel and the second slide plate on the second swing arm can reduce the torque borne by the first door panel and the second door panel due to the abutment of the connecting circuit board, reduce the deformation of the first door panel and the second door panel due to the torque, ensure the flatness of the first door panel and the second door panel, and effectively improve the flatness of the display screen and the display effects such as light and shadow. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solution of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be described below.

[0052] Figure 1 is a schematic structural diagram of a foldable terminal provided by an embodiment of the present application in a folded state;

[0053] Figure 2 yes Figure 1 The schematic diagram of the structure of the foldable terminal shown is in an unfolded state;

[0054] Figure 3 yes Figure 2 The schematic diagram of the partial cross-sectional structure of the foldable terminal after being cut along II;

[0055] Figure 4 yes Figure 1 A schematic diagram of the partial structure of the foldable mechanism of the foldable device in the foldable terminal in the first embodiment;

[0056] Figure 5 yes Figure 2 A schematic diagram of the partial structure of the foldable mechanism of the foldable device in the foldable terminal in the first embodiment;

[0057] Figure 6 yes Figure 5 A schematic diagram of the exploded structure of the foldable mechanism shown;

[0058] Figure 7 yes Figure 6 A schematic diagram of the structure of the base, the damping assembly and the synchronization assembly in the foldable mechanism shown;

[0059] Figure 8 yes Figure 6 A schematic diagram of the structure of the support plate in the foldable mechanism shown;

[0060] Fig. 9 yes Figure 6 A schematic diagram of the structure of the door panel assembly in the foldable mechanism shown;

[0061] Fig.10 yes Fig. 9 The schematic diagram of the structure of the door panel assembly shown is shown at another angle;

[0062] Fig.11 yes Figure 4 The schematic diagram of the structure of the foldable mechanism after being cut apart along II-II;

[0063] Fig.12 yes Figure 5 The schematic diagram of the structure of the foldable mechanism shown is cut along III-III;

[0064] Fig.13 yes Figure 2 A schematic diagram of a force analysis structure of a first door panel and a second door panel of a foldable mechanism in the foldable terminal shown;

[0065] Fig.14 yes Figure 6 A schematic diagram of the structure of the connecting components in the foldable mechanism shown;

[0066] Fig.15 yes Figure 1 A schematic structural diagram of a foldable mechanism of a foldable device in a foldable terminal according to a second embodiment;

[0067] Fig.16 yes Figure 2 A schematic structural diagram of a foldable mechanism of a foldable device in a foldable terminal according to a second embodiment;

[0068] Fig.17 yes Fig.16 A schematic diagram of the structure of the door panel assembly in the foldable mechanism shown;

[0069] Fig.18 yes Fig.17 The schematic diagram of the structure of the door panel assembly shown is shown at another angle;

[0070] Fig.19 yes Fig.15 The schematic diagram of the structure of the foldable mechanism shown is cut along IV-IV;

[0071] Fig. 20 yes Fig.16 The foldable mechanism shown is a schematic structural diagram after being cut open along VV. DETAILED DESCRIPTION

[0072] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0073] See also Figure 1 and Figure 2 , Figure 1 is a structural schematic diagram of a foldable terminal 1000 provided in an embodiment of the present application in a folded state, Figure 2 yes Figure 1 The structure diagram of the foldable terminal 1000 is shown in the unfolded state.

[0074] The foldable terminal 1000 may be a foldable electronic product such as a mobile phone, a tablet computer, a personal computer, a multimedia player, an e-book reader, a laptop computer, a vehicle-mounted device, or a wearable device. In this embodiment, the foldable terminal 1000 is a foldable mobile phone. That is, the foldable terminal 1000 is a mobile phone that can be switched between a folded state and an unfolded state.

[0075] For the convenience of description, we define Figure 1 The width direction of the foldable terminal 1000 is the X-axis direction, the length direction of the foldable terminal 1000 is the Y-axis direction, and the thickness direction of the foldable terminal 1000 is the Z-axis direction. The X-axis direction, the Y-axis direction, and the Z-axis direction are perpendicular to each other. Exemplarily, the extension direction of the rotation axis of the foldable terminal 1000 is parallel to the Y-axis direction. That is, the foldable terminal 1000 can be relatively unfolded or relatively folded around the Y-axis direction.

[0076] It should be noted that the qualifiers such as parallel and perpendicular mentioned in the embodiments of the present application regarding the relative position relationship are all for the current process level, rather than an absolute and strict definition in the mathematical sense. A small amount of deviation is allowed, and both approximately parallel and approximately perpendicular are acceptable. For example, A and B are parallel, which means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 and 10 degrees. For example, A and B are perpendicular, which means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80 and 100 degrees.

[0077] in, Figure 1The foldable terminal 1000 is shown in a folded state. At this time, the size of the foldable terminal 1000 along the X-axis direction is small, and the foldable terminal 1000 is easy to carry. Figure 2 The foldable terminal 1000 is shown in an unfolded state. Figure 2 The unfolding angle α of the foldable terminal 1000 is 180 degrees. In other words, Figure 1 The foldable terminal 1000 is shown in a flattened state. At this time, the size of the foldable terminal 1000 along the X-axis direction is relatively large, and the foldable terminal 1000 has a relatively large display area.

[0078] It should be noted that the angles illustrated in the embodiments of the present application are allowed to have slight deviations. Figure 2 The unfolding angle α of the foldable terminal 1000 shown is 180 degrees, which means that α can be 180 degrees, or approximately 180 degrees, such as 170 degrees, 175 degrees, 185 degrees, and 190 degrees, etc. The angles described below by way of example can be understood in the same way.

[0079] It should be understood that the foldable terminal 1000 shown in the embodiment of the present application is a terminal that can be folded once. In some other embodiments, the foldable terminal 1000 can also be a terminal that can be folded multiple times (more than twice). In this case, the foldable terminal 1000 can include multiple parts, and two adjacent parts can be folded relatively close to each other until the foldable terminal 1000 is in a folded state, and the two adjacent parts can also be unfolded relatively away from each other until the foldable terminal 1000 is in an unfolded state.

[0080] The foldable terminal 1000 includes a foldable device 100 and a display screen 200, and the display screen 200 is installed on the foldable device 100. The display screen 200 includes a display surface 201 away from the foldable device 100, and the display surface 201 is used to display information such as text, images or videos. In this embodiment, the display screen 200 includes a first display portion 210, a second display portion 220 and a foldable portion 230, and the foldable portion 230 is connected between the first display portion 210 and the second display portion 220. Among them, the foldable portion 230 can be bent around the Y-axis direction.

[0081] like Figure 1 As shown, when the foldable terminal 1000 is in the folded state, the foldable device 100 and the display screen 200 are both in the folded state, the first display portion 210 and the second display portion 220 are arranged opposite to each other, and the foldable portion 230 is bent. At this time, the exposed area of ​​the display screen 200 is relatively small, which can greatly reduce the probability of the display screen 200 being damaged, and achieve effective protection of the display screen 200.

[0082] like Figure 2As shown, when the foldable terminal 1000 is in a flattened state, the foldable device 100 and the display screen 200 are both in a flattened state, the first display portion 210 and the second display portion 220 are relatively flattened, and the foldable portion 230 is flattened without bending. At this time, the angle between the first display portion 210 and the second display portion 220, the angle between the first display portion 210 and the foldable portion 230, and the angle between the second display portion 220 and the foldable portion 230 are all α, and the display screen 200 has a large display area, realizing a large-screen display of the foldable terminal 1000, and improving the user experience.

[0083] It should be understood that the foldable terminal 1000 shown in the embodiment of the present application is folded inwardly, and when the foldable terminal 1000 is in the folded state, the display screen 200 is located on the inner side of the foldable device 100. In some other embodiments, the foldable terminal 1000 can also be folded in an outward folding manner, and when the foldable terminal 1000 is in the folded state, the display screen 200 is located on the outer side of the foldable device 100.

[0084] The foldable device 100 includes a first housing 110, a second housing 120, a foldable mechanism 130, a first circuit board 140, a second circuit board 150, and a connecting circuit board 160. The foldable mechanism 130 is connected between the first housing 110 and the second housing 120 to achieve a rotational connection between the first housing 110 and the second housing 120. Specifically, the first housing 110 carries the first display portion 210, and the second housing 120 carries the second display portion 220. In other words, the first display portion 210 is mounted on the first housing 110, and the second display portion 220 is mounted on the second housing 120. Among them, the foldable mechanism 130 is arranged opposite to the foldable portion 230.

[0085] The first shell 110 and the second shell 120 can rotate relative to each other through the foldable mechanism 130, so that the foldable device 100 can switch between the folded state and the unfolded state. Specifically, the first shell 110 and the second shell 120 can rotate relative to each other to be arranged opposite to each other, so that the foldable device 100 is in the folded state, such as Figure 1 At this time, the foldable mechanism 130 is in a folded state. The first housing 110 and the second housing 120 can also be relatively rotated to be relatively flat, so that the foldable terminal 1000 is in a flattened state, as shown in FIG. Figure 2 At this time, the angle between the first shell 110 and the second shell 120 is α, and the foldable mechanism 130 is in a flattened state.

[0086] Please also read Figure 3 , Figure 3 yes Figure 2The foldable terminal 1000 is a schematic diagram of a partial cross-sectional structure after being cut along line II. When cut along line II, it means cutting along the plane where line II is located, and other similar descriptions in this document can be understood in the same way.

[0087] The first circuit board 140 is disposed inside the first housing 110, and the second circuit board 150 is disposed inside the first housing 110. The connecting circuit board 160 can be disposed inside the foldable mechanism 130, and electrically connected between the first circuit board 140 and the second circuit board 150, so as to realize the electrical connection between the first circuit board 140 and the second circuit board 150. Among them, the connecting circuit board 160 and the first swing arm (not shown), the second swing arm (not shown), the third swing arm (not shown) and the fourth swing arm (not shown) are all spaced apart. In other words, the connecting circuit board 160 will avoid the first swing arm, the second swing arm, the third swing arm and the second swing arm, etc., so as to reduce the influence of the connecting circuit board 160 being disposed inside the foldable mechanism 130 on the movement of the foldable mechanism 130.

[0088] In this embodiment, the connection circuit board 160 includes a first end 161, a second end 162 and a flexible connection part 163, and the flexible connection part 163 is connected between the first end 161 and the second end 162. The first end 161 can be arranged inside the first housing 110 and electrically connected to the first circuit board 140. The second end 162 can be arranged inside the second housing 120 and electrically connected to the second circuit board 150. The flexible connection part 163 can be inserted inside the foldable mechanism 130. Specifically, the flexible connection part 163 is inserted between the first door plate (not shown) and the first fixing frame (not shown) of the foldable mechanism 130, between the support plate (not shown) and the base (not shown), and between the second door plate (not shown) and the second fixing frame (not shown). Among them, the structures of the support plate, the first door plate, the second door plate, the third swing arm, the second swing arm, the first fixing frame, the second fixing frame, the first swing arm and the second swing arm, and the matching structures between the two can all refer to the relevant descriptions in the following text.

[0089] Exemplarily, the connecting circuit board 160 may be a flexible printed circuit (FPC). In some other embodiments, part of the connecting circuit board 160 may be a flexible circuit board, and part of the connecting circuit board 160 may be a rigid circuit board, for example, the first end 161 and / or the second end 162 may be a rigid circuit board, and the flexible connecting portion 163 may be a flexible circuit board, which is not specifically limited in the present application.

[0090] It should be noted that the "and / or" mentioned in the embodiments of the present application refers to both "and" and "or". For example, "and / or" includes three situations: only exists, only exists, and and exists at the same time. The following description of "and / or" can be understood in the same way.

[0091] The foldable terminal 1000 uses a foldable mechanism 130 to achieve folding, unfolding and hovering. By controlling the first door panel to move relative to the first fixing frame and the second door panel to move relative to the second fixing frame, the angle between the first door panel and the first fixing frame and the angle between the second door panel and the second fixing frame are changed. When the foldable terminal 1000 is in a folded state, a "water drop angle" can be formed between the first door panel, the second door panel and the support plate to accommodate the foldable portion 230 of the display screen 200. When the foldable terminal 1000 is in an unfolded state, the first door panel, the second door panel and the support plate can jointly support the foldable portion 230 of the display screen 200. Therefore, the movement accuracy and flatness of the first door panel and the second door panel affect the flatness of the display screen 200 and the display effects such as light and shadow.

[0092] In a conventional foldable mechanism, a structure that cooperates with the door panel is often designed on a swing arm, a base or a fixed frame to control the movement of the door panel. For example, a sliding shaft is designed on the swing arm, and a sliding hole is designed on the door panel. The movement of the door panel is controlled by the cooperation between the sliding shaft and the sliding hole. However, when the foldable mechanism is in the unfolded state, the cooperation position of the swing arm and the door panel (such as Figure 3 The positions shown in Q1 and Q2 are far from the base, and the connecting circuit board will push the door plate upwards to the end close to the base (such as Figure 3 The position shown in P1 and P2) causes the end of the door panel close to the base to bulge upward, resulting in poor flatness between the door panel and the support plate, affecting the flatness and display effect of the display screen. Moreover, when the foldable mechanism switches from the folded state to the unfolded state, when the foldable mechanism is about to switch to the unfolded state, the swing arm has poor control accuracy over the movement of the door panel because the matching structure of the swing arm with the door panel is close to the rotation center of the door panel, resulting in poor movement reliability of the door panel, which reduces the reliability of the foldable mechanism.

[0093] Next, the structure of the foldable mechanism 130 in the foldable terminal 1000 shown in the embodiment of the present application will be described.

[0094] See also Figures 4 to 6 , Figure 4 yes Figure 1 The foldable device 100 in the foldable terminal 1000 is a schematic diagram of a partial structure of the foldable mechanism 130 in the first embodiment. Figure 5 yes Figure 2The foldable device 100 in the foldable terminal 1000 is a schematic diagram of a partial structure of the foldable mechanism 130 in the first embodiment. Figure 6 yes Figure 5 A schematic diagram of the exploded structure of the foldable mechanism 130 is shown.

[0095] The foldable mechanism 130 includes a base 10, a damping assembly 20, a synchronization assembly 30, a support plate 40, a door panel assembly 50 and a connection assembly 60, and the damping assembly 20, the synchronization assembly 30, the support plate 40, the door panel assembly 50 and the connection assembly 60 are all installed on the base 10. Exemplarily, the length direction of the base 10 is parallel to the Y-axis direction.

[0096] The damping assembly 20 is installed on the inner side of the base 10. When the foldable mechanism 130 is in a folded state or a flattened state, and when the foldable mechanism 130 switches between the folded state and the flattened state, the damping assembly 20 can provide a damping force. When a user uses the foldable terminal 1000, such as when the foldable terminal 1000 is in a folded state or a flattened state, and when the foldable terminal 1000 switches between the folded state and the flattened state, the user can clearly feel the damping force provided by the damping assembly 20, and the user can experience a better hand feel, thereby improving the user's use experience.

[0097] It should be noted that the figure only shows one damping assembly 20. In the present embodiment, there may be multiple damping assemblies 20. The basic structure of each component in each damping assembly 20, the connection relationship between the components, and the connection relationship between the components and the damping assembly 20 may all refer to the relevant description of the damping assembly 20 in the following text. Alternatively, each damping assembly 20 may be different from the damping assembly 20 in the following text in terms of the detailed structure or position arrangement of each component.

[0098] The synchronization component 30 is installed on the inner side of the base 10 and can be connected to the damping component 20. When the foldable mechanism 130 switches between the folded state and the flattened state, the synchronization component 30 can ensure the synchronous rotation of each component in the foldable mechanism 130. When the user uses the foldable terminal 1000, for example, when the foldable terminal 1000 switches between the folded state and the flattened state, the synchronization component 30 can ensure the synchronous rotation of the first shell 110 and the second shell 120, thereby improving the user experience.

[0099] It should be noted that the figure only shows one synchronization component 30. In the present embodiment, there may be multiple synchronization components 30. The basic structure of each component in each synchronization component 30, the connection relationship between the components, and the connection relationship between the components and the damping component synchronization component 30 may all refer to the relevant description of the synchronization component 30 in the following text. Alternatively, each synchronization component 30 may be different from the synchronization components 30 in the following text in terms of the detailed structure or position arrangement of each component.

[0100] The support plate 40 is fixedly mounted on the base 10 and covers the damping assembly 20 and the synchronization assembly 30. Exemplarily, the length direction of the support plate 40 is parallel to the Y-axis direction. It should be noted that the "covering" mentioned in the embodiments of the present application refers to both "full coverage" and "partial coverage", and the related descriptions involved later can be understood in the same way.

[0101] The door panel assembly 50 is connected to the base 10, the damping assembly 20 and the synchronization assembly 30. Exemplarily, the door panel assembly 50 is rotationally connected to the base 10 and the damping assembly 20, is hinged to the damping assembly 20, and is mutually meshed with the synchronization assembly 30. It should be noted that the "connection" mentioned in the foldable mechanism 130 described in the embodiment of the present application may include two situations: "direct connection" and "indirect connection". "Direct connection" means that the connection between the two can be achieved without a third party, and "indirect connection" means that the connection between the two can be achieved through a third party.

[0102] The connecting assembly 60 connects the base 10 and the door panel assembly 50. Exemplarily, the connecting assembly 60 is slidably and rotatably connected to the base 10, and is slidably and rotatably connected to the door panel assembly 50. The connecting assembly 60 can be folded or unfolded relative to the base 10, and can drive the door panel assembly 50 to be folded or unfolded relative to the base 10.

[0103] It should be noted that the figure only shows one connecting component 60. In this embodiment, there may be multiple connecting components 60. The basic structure of each component in each connecting component 60, the connection relationship between the components, and the connection relationship between the components and the damping component connecting component 60 can all refer to the relevant description of the connecting component 60 in the following text. Alternatively, each connecting component 60 may be different from the connecting components 60 in the following text in terms of the detailed structure or position arrangement of each component.

[0104] like Figure 3 As shown, when the foldable mechanism 130 is in the folded state, the door panel assembly 50 and the connecting assembly 60 are both in the folded state. Figure 4As shown, when the foldable mechanism 130 is in the unfolded state, the door panel assembly 50 and the connecting assembly 60 are both in the unfolded state. When the foldable mechanism 130 switches from the folded state to the unfolded state, the door panel assembly 50 and the connecting assembly 60 are both switched from the folded state to the unfolded state. When the foldable mechanism 130 switches from the unfolded state to the folded state, the door panel assembly 50 and the connecting assembly 60 are both switched from the unfolded state to the folded state. In the process of the foldable mechanism 130 switching between the folded state and the unfolded state, the damping assembly 20 can provide a damping force, and the synchronization assembly 30 can ensure the synchronous rotation of the components in the door panel assembly 50 and the connecting assembly 60.

[0105] See also Figure 6 and Figure 7 , Figure 7 yes Figure 6 A schematic structural diagram of the base 10 , the damping assembly 20 and the synchronization assembly 30 in the foldable mechanism 130 is shown.

[0106] The base 10 is provided with a mounting groove 101, a first sliding groove 102, a second sliding groove 103 and a fixed groove 104. The openings of the mounting groove 101, the first sliding groove 102, the second sliding groove 103 and the fixed groove 104 are all located on the top surface of the base 10 (not marked in the figure). The mounting groove 101, the first sliding groove 102, the second sliding groove 103 and the fixed groove 104 are all recessed in the direction (negative direction of the Z axis in the figure) from the top surface to the bottom surface (not marked in the figure) of the base 10. Specifically, along the length direction of the base 10, the first sliding groove 102 and the second sliding groove 103 are located on one side of the mounting groove 101 and are spaced apart from the mounting groove 101. Along the width direction of the base 10 (X axis direction in the figure), the first sliding groove 102 and the second sliding groove 103 are arranged in sequence. Exemplarily, there are two fixing grooves 104. Along the length direction of the base 10, one fixing groove 104 is located on one side of the mounting groove 101 and between the first sliding groove 102 and the second sliding groove 103, and is spaced apart from the mounting groove 101, the first sliding groove 102 and the second sliding groove 103. The other fixing groove 104 is located on the other side of the mounting groove 101 and is spaced apart from the mounting groove 101.

[0107] It should be noted that the directional terms such as “top”, “bottom”, “left”, “right”, “front” and “back” used in the embodiment of the present application to describe the foldable terminal 1000 are mainly explained based on the display orientation of the foldable terminal 1000 in the accompanying drawings, with the positive direction of the Z axis being the “top”, the negative direction of the Z axis being the “bottom”, the positive direction of the X axis being the “right”, the negative direction of the X axis being the “left”, the positive direction of the Y axis being the “back”, and the negative direction of the Y axis being the “front”. It does not constitute a limitation on the orientation of the foldable terminal 1000 in actual application scenarios.

[0108] The damping assembly 20 and the synchronization assembly 30 are both located in the mounting groove 101 of the base 10. In this embodiment, the damping assembly 20 includes a first rotating shaft 21, a second rotating shaft 22, two third rotating shafts 23, a first bracket 24, a second bracket 25, a first elastic member 26, a second elastic member 27 and two third elastic members 28. The first rotating shaft 21, the second rotating shaft 22 and the two third rotating shafts 23 are all installed in the mounting groove 101. Along the width direction of the base 10, the first rotating shaft 21 and the second rotating shaft 22 are arranged at intervals, and the two third rotating shafts 23 are both located between the first rotating shaft 21 and the second rotating shaft 22, and are arranged at intervals from the first rotating shaft 21 and the second rotating shaft 22. Exemplarily, the length directions of the first rotating shaft 21, the second rotating shaft 22 and the third rotating shaft 23 are all parallel to the Y-axis direction.

[0109] The first bracket 24 and the second bracket 25 are both sleeved on the first rotating shaft 21, the second rotating shaft 22 and the two third rotating shafts 23. Along the length direction of the base 10, the first bracket 24 and the second bracket 25 are spaced from each other. The first bracket 24 includes a first hinged surface (not marked in the figure) and a second hinged surface (not marked in the figure) away from the second bracket 25, and along the width direction of the first bracket 24 (the X-axis direction in the figure), the first hinged surface and the second hinged surface are spaced from each other. The second bracket 25 includes a third hinged surface (not marked in the figure) and a fourth hinged surface (not marked in the figure) away from the first bracket 24, and along the width direction of the second bracket 25 (the X-axis direction in the figure), the third hinged surface and the fourth hinged surface are spaced from each other. The third hinged surface is arranged opposite to the first hinged surface, and the fourth hinged surface is arranged opposite to the second hinged surface. Among them, the first hinged surface, the second hinged surface, the third hinged surface and the fourth hinged surface include a plurality of crests (not marked in the figure) and a plurality of troughs (not marked in the figure), and the plurality of crests and the plurality of troughs are alternately connected. Exemplarily, the first articulated surface, the second articulated surface, the third articulated surface and the fourth articulated surface each include three wave crests and three wave troughs.

[0110] The first elastic member 26 is sleeved on the first rotating shaft 21, and is located between the first bracket 24 and the second bracket 25, and is abutted between the first bracket 24 and the second bracket 25. The second elastic member 27 is sleeved on the second rotating shaft 22, and is located between the first bracket 24 and the second bracket 25, and is abutted between the first bracket 24 and the second bracket 25. The two third elastic members 28 are respectively sleeved on the two third rotating shafts 23, and are located between the first bracket 24 and the second bracket 25, and are abutted between the first bracket 24 and the second bracket 25. Among them, along the X-axis direction, the two third elastic members 28 are both located between the first elastic member 26 and the second elastic member 27. Exemplarily, the first elastic member 26, the second elastic member 27 and the third elastic member 28 are all springs. In some other embodiments, one or more of the first elastic member 26, the second elastic member 27 and the third elastic member 28 can also be an elastic structural member with elasticity such as elastic cotton, and this application does not make specific restrictions on this.

[0111] In the foldable mechanism 130 shown in this embodiment, the damping assembly 20 uses the elastic deformation of the elastic member to provide the damping force. In some other embodiments, the damping assembly 20 may also use other structures to provide the damping force, such as using a damping sheet or other structures to provide the damping force, or the damping assembly 20 may also use both the elastic member and the damping sheet or other components to provide the damping force. The present application does not impose any specific restrictions on the structure of the damping assembly 20.

[0112] The synchronization assembly 30 is located on the side of the first bracket 24 away from the second bracket 25, and is spaced apart from the first bracket 24. In this embodiment, the synchronization assembly 30 includes two synchronization gears 31, which are respectively sleeved on the two third rotating shafts 23 and meshed with each other. When one synchronization gear 31 rotates relative to the base 10, it can drive the other synchronization gear 31 to rotate relative to the base 10. Among them, the two synchronization gears 31 are spaced apart from the first rotating shaft 21 and the second rotating shaft 22.

[0113] In the foldable mechanism 130 shown in this embodiment, the synchronization assembly 30 uses synchronization gears to achieve synchronization rotation. In some other embodiments, the synchronization assembly 30 can also use other structures to achieve synchronization rotation, such as using a synchronization slot and a synchronization slider to achieve synchronization rotation, or the synchronization assembly 30 can use synchronization gears and synchronization slots and synchronization sliders to achieve synchronization rotation at the same time. The present application does not impose specific restrictions on the structure of the synchronization assembly 30.

[0114] Please also read Figure 8 , Figure 8 yes Figure 6 A schematic structural diagram of the support plate 40 in the foldable mechanism 130 is shown.

[0115] The support plate 40 is installed on the top side of the base 10 and covers the damping assembly 20 and the synchronization assembly 30. The support plate 40 is provided with a first avoidance notch 401, a second avoidance notch 402 and a fixing hole 403, and the first avoidance notch 401, the second avoidance notch 402 and the fixing hole 403 all penetrate the support plate 40 along the thickness direction (Z-axis direction in the figure). Along the width direction (X-axis direction in the figure) of the support plate 40, the first avoidance notch 401 and the second avoidance notch 402 are arranged at intervals. Among them, the first avoidance notch 401 penetrates the left side of the support plate 40, and the second avoidance notch 402 penetrates the right side of the support plate 40.

[0116] Exemplarily, the first avoidance gap 401 includes a first sub-avoidance gap 404 and a second sub-avoidance gap 405, and the first sub-avoidance gap 404 and the second sub-avoidance gap 405 are arranged at intervals along the length direction of the support plate 40. The second avoidance gap 402 includes a third sub-avoidance gap 406 and a fourth sub-avoidance gap 407, and the third sub-avoidance gap 406 and the fourth sub-avoidance gap 407 are arranged at intervals along the length direction of the support plate 40. In particular, along the width direction of the support plate 40, the third sub-avoidance gap 406 is arranged at intervals from the first sub-avoidance gap 404, and the fourth sub-avoidance gap 407 is arranged at intervals from the second sub-avoidance gap 405.

[0117] There are two fixing holes 403, which are respectively located on opposite sides of the first avoidance notch 401 and the second avoidance notch 402 along the length direction of the support plate 40, and are spaced apart from the first avoidance notch 401 and the second avoidance notch 402. The two fixing holes 403 are respectively connected to the two fixing grooves 104.

[0118] In addition, the foldable mechanism 130 also includes two fixing parts (not shown), each of which is inserted into a fixing hole 403 of the support plate 40 and a fixing groove 104 of the base 10, and is fixedly connected to the support plate 40 and the base 10 to fix the support plate 40 to the base 10.

[0119] Please also read Fig. 9 and Fig.10 , Fig. 9 yes Figure 6 The schematic diagram of the structure of the door panel assembly 50 in the foldable mechanism 130 is shown. Fig.10 yes Fig. 9 The door panel assembly 50 is shown as a schematic structural diagram at another angle.

[0120] The door panel assembly 50 is sleeved on the first rotating shaft 21 and the second rotating shaft 22, and is hinged to the first bracket 24 and the second bracket 25, and is meshed with two synchronous gears 31. In this embodiment, the door panel assembly 50 includes a first door panel 51, a second door panel 52, a first swing arm 53 and a second swing arm 54. The first swing arm 53 is sleeved on the first rotating shaft 21, and is hinged to the first bracket 24 and the second bracket 25, and is meshed with a synchronous gear 31, and is also connected to the first door panel 51 in a sliding and rotational manner. The second swing arm 54 is sleeved on the second rotating shaft 22, and is hinged to the first bracket 24 and the second bracket 25, and is meshed with a synchronous gear 31, and is also connected to the second door panel 52 in a sliding and rotational manner.

[0121] The first door panel 51 includes a first plate body 511, a first protrusion 512, a first guide slider 513, a first guide column 514 and a second guide column 515. The first protrusion 512, the first guide slider 513, the first guide column 514 and the second guide column 515 are all located on the same side of the first plate body 511 and are all fixedly connected to the first plate body 511. Specifically, the first protrusion 512, the first guide slider 513, the first guide column 514 and the second guide column 515 are all located on the bottom side of the first plate body 511. The first protrusion 512 and the first guide slider 513 are both fixedly connected to the first plate body 511. The first guide column 514 and the second guide column 515 are both fixedly connected to the first protrusion 512. That is, the first guide column 514 and the second guide column 515 are fixedly connected to the first plate body 511 through the first protrusion 512. In some other embodiments, the first guide pillar 514 and the second guide pillar 515 may also be directly fixedly connected to the first plate body 511 . The present application does not impose any specific limitation on the connection method between the first guide pillar 514 and the second guide pillar 515 and the first plate body 511 .

[0122] Exemplarily, the first plate body 511, the first protrusion 512, the first guide slider 513, the first guide column 514 and the second guide column 515 can be integrally formed to improve the structural strength of the first door panel 51 and ensure the structural stability of the first door panel 51. In some other embodiments, the first door panel 51 can also be an integral structural member formed by assembly, for example, the first protrusion 512 or the first guide slider 513 can be fixedly connected to the first plate body 511 by welding or bonding, or the first guide column 514 and the second guide column 515 can be fixedly connected to the first protrusion 512 by welding or bonding.

[0123] The length direction of the first plate 511 is parallel to the Y-axis direction. The first protrusion 512 and the first guide slider 513 are both fixedly connected to the bottom surface (not marked in the figure) of the first plate 511. The first protrusion 512 and the first guide slider 513 both extend from the bottom surface of the first plate 511 in a direction away from the top surface (not marked in the figure) (in the negative direction of the Z axis in the figure). Along the length direction of the first plate 511, the first guide slider 513 is located on one side of the first protrusion 512 and is spaced apart from the first protrusion 512.

[0124] The first guide post 514 and the second guide post 515 are both fixedly connected to the surface of the first protrusion 512 away from the first guide slider 513, and extend from the surface of the first protrusion 512 away from the first guide slider 513 in the direction away from the first guide slider 513 (the negative direction of the Y axis in the figure). Specifically, the distance between the first guide post 514 and the second guide post 515 and the right side surface (not marked in the figure) of the first plate body 511 is the first distance, and the distance between the first guide post 514 and the second guide post 515 and the left side surface (not marked in the figure) of the first plate body 511 is the second distance, and the second distance is greater than the first distance. That is, the first guide post 514 and the second guide post 515 are arranged close to the right side of the first plate body 511. Among them, the second guide post 515 is located between the first guide post 514 and the first plate body 511, and is spaced and arranged opposite to the first guide post 514. Exemplarily, the second guide post 515 is fixedly connected to the bottom surface of the first plate body 511.

[0125] In this embodiment, the first guide post 514 includes a first clamping surface 516 facing the second guide post 515, and the second guide post 515 includes a second clamping surface 517 facing the first guide post 514. The first clamping surface 516 and the second clamping surface 517 are both arc-shaped surfaces. Exemplarily, the axes of the first clamping surface 516 and the second clamping surface 517 are parallel to the Y-axis direction, and the radius of the second clamping surface 517 is greater than the radius of the first clamping surface 516.

[0126] The second door panel 52 includes a second plate body 521, a second protrusion 522, a second guide slider 523, a third guide post 524 and a fourth guide post 525. The second protrusion 522 and the second guide slider 523 are both fixedly connected to the second plate body 521, and the third guide post 524 and the fourth guide post 525 are both fixedly connected to the second protrusion 522. The structure of the second door panel 52 can refer to the relevant description of the first door panel 51, which will not be repeated here.

[0127] The first swing arm 53 includes a first rotating portion 531, a first sliding portion 532 and a first connecting portion 533. The first rotating portion 531 is sleeved on the first rotating shaft 21, and is hinged with the first bracket 24 and the second bracket 25, and is meshed with a synchronous gear 31. Among them, the first rotating portion 531 can be exposed relative to the first avoidance gap 401. That is, the first avoidance gap 401 can avoid the first rotating portion 531 to avoid mutual interference between the first rotating portion 531 and the support plate 40, thereby ensuring the smoothness of the rotation of the first swing arm 53 relative to the base 10. The first sliding portion 532 is slidably and rotatably connected to the first door panel 51. The first connecting portion 533 is fixedly connected between the first rotating portion 531 and the first sliding portion 532. Among them, the first rotating portion 531, the first sliding portion 532 and the first connecting portion 533 can be integrally formed.

[0128] The first rotating part 531 includes a first sub-rotating part 534 and a second sub-rotating part 535, and the first sub-rotating part 534 and the second sub-rotating part 535 are arranged at intervals along the length direction of the first rotating part 531 (the Y-axis direction in the figure). Specifically, the first sub-rotating part 534 and the second sub-rotating part 535 are both sleeved on the first rotating shaft 21, and can rotate relative to the base 10 to achieve the rotational connection between the first rotating part 531 and the base 10, and further achieve the rotational connection between the first swing arm 53 and the base 10. The first sub-rotating part 534 includes a fifth hinge surface 5341 facing the second sub-rotating part 535, and the fifth hinge surface 5341 is hinged to the first hinge surface to achieve the hinge connection between the first rotating part 531 and the first bracket 24, and further achieve the hinge connection between the first swing arm 53 and the first bracket 24. The second sub-rotating portion 535 includes a sixth articulated surface 5351 facing the first sub-rotating portion 534, and the sixth articulated surface 5351 is articulated with the third articulated surface to realize the articulation between the first rotating portion 531 and the second bracket 25, thereby realizing the articulation between the first swing arm 53 and the second bracket 25. Wherein, the fifth articulated surface 5341 and the sixth articulated surface 5351 both include a plurality of crests (not marked in the figure) and a plurality of troughs (not marked in the figure), and the plurality of crests and the plurality of troughs are alternately connected. Exemplarily, the fifth articulated surface 5341 and the sixth articulated surface 5351 both include three crests and three troughs.

[0129] At this time, the first sub-rotating portion 534 is exposed relative to the first sub-avoidance notch 404, and the second sub-rotating portion 535 is exposed relative to the second sub-avoidance notch 405. That is, the first sub-avoidance notch 404 avoids the first sub-rotating portion 534, and the second sub-avoidance notch 405 avoids the second sub-rotating portion 535, so as to avoid interference between the first sub-rotating portion 534 and the second sub-rotating portion 535 and the support plate 40, thereby ensuring smoothness when the first swing arm 53 rotates relative to the base 10.

[0130] When the first swing arm 53 rotates relative to the base 10, when the wave crest of the fifth articulated surface 5341 in the first swing arm 53 abuts against the wave trough of the first articulated surface in the first bracket 24, and the wave crest of the sixth articulated surface 5351 in the first swing arm 53 abuts against the wave trough of the third articulated surface in the second bracket 25, the state changes to that the wave crest of the fifth articulated surface 5341 in the first swing arm 53 abuts against the wave crest of the first articulated surface in the first bracket 24, and the wave crest of the sixth articulated surface 5351 in the first swing arm 53 abuts against the wave crest of the third articulated surface in the second bracket 25. In this process, the first bracket 24 and the second bracket 25 will approach each other relative to the direction of the first rotating shaft 21, and the first bracket 24 and the second bracket 25 will squeeze the first elastic member 26, and the first elastic member 26 will undergo elastic deformation.

[0131] When the wave crest of the fifth articulated surface 5341 in the first swing arm 53 abuts against the wave crest of the first articulated surface in the first bracket 24, and the wave crest of the sixth articulated surface 5351 in the first swing arm 53 abuts against the wave crest of the third articulated surface in the second bracket 25, and the wave crest of the fifth articulated surface 5341 in the first swing arm 53 abuts against the wave trough of the first articulated surface in the first bracket 24, and the wave crest of the sixth articulated surface 5351 in the first swing arm 53 abuts against the wave trough of the third articulated surface in the second bracket 25, the first bracket 24 and the second bracket 25 will move away from each other relative to the first rotating shaft 21, and the first elastic member 26 will undergo elastic recovery.

[0132] Therefore, when the first swing arm 53 rotates relative to the base 10, the damping force can be provided by elastic deformation and elastic recovery of the first elastic member 26, and the user can experience a better hand feel, thereby improving the user's usage experience.

[0133] In addition, the first sub-rotating portion 534 is provided with a first gear portion 5342, which is provided on the circumference of the first sub-rotating portion 534 and is arranged around the axis of the first sub-rotating portion 534 (i.e., the axis of the first rotating shaft 21), and is meshed with a synchronous gear 31. When the first swing arm 53 rotates relative to the base 10, the first gear portion 5342 drives one synchronous gear 31 to rotate relative to the base 10, and one synchronous gear 31 drives another synchronous gear 31 to rotate relative to the base 10.

[0134] The first sliding portion 532 includes a first sub-sliding portion 536, a second sub-sliding portion 537 and a first slide plate 538. Along the length direction of the first sliding portion 532 (the Y-axis direction as shown in the figure), the first sub-sliding portion 536 and the second sub-sliding portion 537 are arranged at intervals. The first slide plate 538 is fixedly connected to the side of the second sub-sliding portion 537 facing the first sub-sliding portion 536, and is spaced apart from the first sub-sliding portion 536.

[0135] In this embodiment, the structure of the first slide plate 538 is adapted to the structure of the first guide column 514 and the second guide column 515. It should be noted that the adaptation of the structure of the first slide plate 538 to the structure of the first guide column 514 and the second guide column 515 means that the structure of the first slide plate 538 matches the movement path of the first guide column 514 and the second guide column 515. After the first slide plate 538 is assembled with the first guide column 514 and the second guide column 515, during the use of the foldable mechanism 130, the relative movement process between the first swing arm 53 and the first door panel 51 is smooth and free of jamming, so as to ensure the reliability of the use of the foldable mechanism 130.

[0136] The first slide plate 538 is in the shape of a flat plate, and the angle between the first slide plate 538 and the positive direction of the X-axis is an acute angle. The first slide plate 538 has an unfolding position 5381 and a folding position 5382, and the folding position 5382 is located outside the unfolding position 5381 and at the bottom side of the unfolding position 5381, and is spaced apart from the unfolding position 5381. Exemplarily, the folding position 5382 is located at the outermost side of the first slide plate 538, and the unfolding position 5381 is located at the innermost side of the first slide plate 538.

[0137] It should be noted that when describing the foldable mechanism 130 in the embodiment of the present application, the “inside” and “outside” involved are all described with reference to the orientation of the foldable mechanism 130 when it is in the unfolded state, with the side close to the base 10 being the “inside” and the side away from the base 10 being the “outside”, which does not constitute a limitation on the orientation of the foldable mechanism 130 in the actual application scenario.

[0138] The second swing arm 54 includes a second rotating portion 541, a second sliding portion 542 and a second connecting portion 543. The second rotating portion 541 is sleeved on the second rotating shaft 22, and is hinged with the first bracket 24 and the second bracket 25, and is meshed with another synchronous gear 31. Among them, the second rotating portion 541 can be exposed relative to the second avoidance gap 402. That is, the second avoidance gap 402 can avoid the second rotating portion 541 to avoid mutual interference between the second rotating portion 541 and the support plate 40, thereby ensuring the smoothness of the rotation of the second swing arm 54 relative to the base 10. The second sliding portion 542 is slidably and rotatably connected to the second door panel 52. The second connecting portion 543 is fixedly connected between the second rotating portion 541 and the second sliding portion 542. Among them, the second sliding portion 542, the second connecting portion 543 and the second rotating portion 541 can be integrally formed.

[0139] In this embodiment, the structure of the second swing arm 54 and the matching relationship between the second swing arm 54 and the second door panel 52 and the base 10 can refer to the structure of the first swing arm 53 and the related description of the matching relationship between the first swing arm 53 and the first door panel 51 and the base 10, which will not be repeated here.

[0140] When the first swing arm 53 and the second swing arm 54 rotate relative to the base 10, the first swing arm 53 and the second swing arm 54 jointly abut the first bracket 24 and the second bracket 25, so that the first bracket 24 and the second bracket 25 are close to each other or away from each other, and the first elastic member 26, the second elastic member 27 and the two third elastic members 28 can be elastically deformed or elastically restored, so that the damping assembly 20 can provide a damping force. When the user folds or unfolds the foldable terminal 1000, the user can feel the change of the damping force generated by the damping assembly 20, and the user can experience a better hand feel, thereby improving the user's use experience. In other words, the first swing arm 53 and the second swing arm 54 can be used as both the door panel swing arm of the door panel assembly 50 and the damping swing arm of the damping assembly 20, so that the damping swing arm of the damping assembly 20 is omitted, the structure of the foldable mechanism 130 is simplified, and it is helpful to achieve a lightweight design of the foldable terminal 1000.

[0141] In addition, in the second rotating part 541, the second gear portion 5442 of the third sub-rotating part 544 meshes with another synchronous gear 31. When the second swing arm 54 rotates relative to the base 10, the second gear portion 5442 drives another synchronous gear 31 to rotate relative to the base 10, and another synchronous gear 31 can drive one synchronous gear 31 to rotate relative to the base 10.

[0142] In this embodiment, the first swing arm 53 drives one synchronous gear 31 to rotate relative to the base 10, one synchronous gear 31 drives another synchronous gear 31 to rotate relatively, and the other synchronous gear 31 drives the second swing arm 54 to rotate relative to the base 10, thereby realizing the relative rotation between the first swing arm 53 and the second swing arm 54. Similarly, when the second swing arm 54 rotates relative to the base 10, the synchronous assembly 30 can synchronously drive the first swing arm 53 to rotate relative to the base 10. In other words, the first swing arm 53 and the second swing arm 54 can be used as both the door panel swing arm of the door panel assembly 50 and the synchronous swing arm of the synchronous assembly 30, so that the synchronous swing arm of the synchronous assembly 30 is omitted, which helps to simplify the structure of the foldable mechanism 130.

[0143] Please also read Fig.11 and Fig.12 , Fig.11 yes Figure 4 The foldable mechanism 130 is a schematic structural diagram after being cut along II-II. Fig.12 yes Figure 5 The foldable mechanism 130 is a schematic structural diagram after being cut apart along III-III.

[0144] The first slide plate 538 is clamped between the first guide column 514 and the second guide column 515, and can slide and rotate relative to the first guide column 514 and the second guide column 515, so as to realize the sliding and rotating connection between the first sliding portion 532 and the first door panel 51, and further realize the sliding and rotating connection between the first swing arm 53 and the first door panel 51. The second slide plate 548 is clamped between the third guide column 524 and the fourth guide column 525, and can slide and rotate relative to the third guide column 524 and the fourth guide column 525, so as to realize the sliding and rotating connection between the second sliding portion 542 and the second door panel 52, and further realize the sliding and rotating connection between the second swing arm 54 and the second door panel 52. The first clamping surface 516 and the second clamping surface 517 clamp the first slide plate 538, and the third clamping surface 526 and the fourth clamping surface 527 clamp the second slide plate 548 together.

[0145] like Fig.11 As shown, when the foldable mechanism 130 is in the folded state, the first door panel 51 and the second door panel 52 are located on the same side of the base 10 and the support plate 40, and are folded relative to each other and spaced from each other, and the first swing arm 53 and the second swing arm 54 are folded relative to each other. The folding position 5382 of the first slide plate 538 is clamped between the first guide column 514 and the second guide column 515, and the folding position 5482 of the second slide plate 548 is clamped between the third guide column 524 and the fourth guide column 525. That is, the first guide column 514 and the second guide column 515 clamp one end of the first slide plate 538 away from the base 10, and the third guide column 524 and the fourth guide column 525 clamp one end of the second slide plate 548 away from the base 10. The first clamping surface 516 and the second clamping surface 517 clamp the folding position 5382 of the first slide plate 538, and the third clamping surface 526 and the fourth clamping surface 527 clamp the folding position 5482 of the second slide plate 548.

[0146] At this time, the first door panel 51, the first swing arm 53, the second door panel 52, the second swing arm 54 and the support plate 40 enclose a avoidance space 1301, and the avoidance space 1301 can avoid the foldable part 230 of the display screen 200. The cross section of the avoidance space 1301 can be "water drop-shaped" to better avoid the R angle formed when the foldable part 230 is bent, so as to ensure that the foldable part 230 will not be bent at a large angle, avoid the display screen 200 from having creases and other undesirable phenomena, and extend the service life of the display screen 200, and ensure the reliability of the foldable terminal 1000.

[0147] like Fig.12As shown, when the foldable mechanism 130 is in the unfolded state, the first door panel 51 and the second door panel 52 are respectively located on opposite sides of the base 10 and the support plate 40, and are relatively flattened, and the first swing arm 53 and the second swing arm 54 are relatively flattened. Among them, the unfolded position 5381 of the first slide plate 538 is clamped between the first guide column 514 and the second guide column 515, and the unfolded position 5481 of the second slide plate 548 is clamped between the third guide column 524 and the fourth guide column 525. That is, the first guide column 514 and the second guide column 515 clamp one end of the first slide plate 538 close to the base 10, and the third guide column 524 and the fourth guide column 525 clamp one end of the second slide plate 548 close to the base 10. Among them, the first clamping surface 516 and the second clamping surface 517 clamp the unfolded position 5381 of the first slide plate 538, and the third clamping surface 526 and the fourth clamping surface 527 clamp the unfolded position 5481 of the second slide plate 548.

[0148] At this time, the top surface of the first door panel 51 (i.e., the top surface of the first plate body 511) and the top surface of the second door panel 52 (i.e., the top surface of the second plate body 521) are flush with the top surface of the support plate 40 (not shown in the figure). At this time, the top surface of the first door panel 51, the top surface of the second door panel 52 and the top surface of the support plate 40 together form a support surface 1302. The support surface 1302 can support the foldable portion 230 of the display screen 200 to ensure a good display of the display screen 200. Among them, the support surface 1302 can be flush with the top surface of the first shell 110 and the top surface of the second shell 120, so that the foldable mechanism 130 can support the display screen 200 together with the first shell 110 and the second shell 120, and realize the effective support of the display screen 200 by the foldable device (not shown) in the flattened state.

[0149] During the folding process of the foldable mechanism 130, for example, during the process of the foldable mechanism 130 switching from the flattened state to the folded state, the first swing arm 53 drives the first door panel 51 to rotate relative to the base 10, and the second swing arm 54 drives the second door panel 52 to rotate relative to the base 10, so that the door panel assembly 50 switches from the unfolded state to the folded state. Among them, the first guide post 514 and the second guide post 515 slide from the unfolded position 5381 clamping the first slide plate 538 to the folded position 5382 clamping the first slide plate 538, and the third guide post 524 and the fourth guide post 525 slide from the unfolded position 5481 clamping the second slide plate 548 to the folded position 5482 clamping the second slide plate 548.

[0150] During the unfolding process of the foldable mechanism 130, for example, during the process of the foldable mechanism 130 switching from the folded state to the unfolded state, the first swing arm 53 drives the first door panel 51 to rotate relative to the base 10, and the second swing arm 54 drives the second door panel 52 to rotate relative to the base 10, so that the door panel assembly 50 switches from the folded state to the unfolded state. Among them, the first guide column 514 and the second guide column 515 slide from the folding position 5382 of the first slide plate 538 to the unfolding position 5381 of the first slide plate 538, and the third guide column 524 and the fourth guide column 525 slide from the folding position 5482 of the second slide plate 548 to the unfolding position 5481 of the second slide plate 548.

[0151] Please also read Fig.13 , Fig.13 yes Figure 2 The schematic diagram of the force analysis structure of the first door panel 51 and the second door panel 52 of the foldable mechanism 130 in the foldable terminal 1000 is shown. Fig.13 The straight lines with arrows shown represent the directions of forces.

[0152] Fig.13 In the figure, the positions indicated by P1 and P2 are the points where the connecting circuit board 160 acts on the first door panel 51 and the second door panel 52, the positions indicated by Q1 and Q2 are the points where the first swing arm acts on the first door panel and the second swing arm acts on the second door panel in a traditional foldable terminal, and the positions indicated by S1 and S2 are the points where the first swing arm 53 acts on the first door panel 51 and the second swing arm 54 acts on the second door panel 52 in the foldable terminal 1000 shown in the embodiment of the present application.

[0153] When the conventional foldable terminal is in the unfolded state, the distance between the first swing arm acting on the first door panel at a point Q1 and the connecting circuit board acting on the first door panel at a point P1, and the distance between the second swing arm acting on the second door panel at a point Q2 and the connecting circuit board acting on the second door panel at a point P2 are both L1. At this time, the torque acting on the first door panel by the first swing arm and the connecting circuit board, and the torque acting on the second door panel by the second swing arm and the connecting circuit board are both M1.

[0154] When the foldable terminal 1000 shown in the embodiment of the present application is in the unfolded state, the distance between the action point S1 of the first swing arm 53 on the first door panel 51 and the action point P1 of the connecting circuit board 160 on the first door panel 51, and the distance between the action point S2 of the second swing arm 54 on the second door panel 52 and the action point P2 of the connecting circuit board 160 on the second door panel 52 are both L2. Wherein, L2<L1. That is, compared with the traditional foldable terminal, in the foldable terminal 1000 shown in the embodiment of the present application, the clamping point of the first door panel 51 on the first swing arm 53 (i.e., the action point S1), and the clamping point of the second door panel 52 on the second swing arm 54 (i.e., the action point S2) are both close to the base 10. At this time, the torque of the first swing arm 53 and the connecting circuit board 160 on the first door panel 51, and the torque of the second swing arm 54 and the connecting circuit board 160 on the second door panel 52 are both M2.

[0155] Therefore, when the forces acting on the first door panel 51 and the second door panel 52 by the connecting circuit board 160 are the same, since L2<L1, then M2<M1. It can be seen that, compared with the traditional foldable terminal, in the foldable terminal 1000 shown in the embodiment of the present application, the torque borne by the first door panel 51 and the second door panel 52 is smaller, and the deformation of the first door panel 51 and the second door panel 52 caused by the torque M2 is reduced, which helps to ensure the flatness of the first door panel 51 and the second door panel 52, and can effectively improve the flatness of the display screen 200 and the display effects such as light and shadow.

[0156] Moreover, the structures of the first guide column 514 and the second guide column 515 on the first door panel 51, the third guide column 524 and the fourth guide column 525 on the second door panel 52, and the first slide plate 538 on the first swing arm 53 and the second slide plate 548 on the second swing arm 54 are all simply designed. The matching structure between the first guide column 514 and the second guide column 515 and the first slide plate 538, and between the third guide column 524 and the fourth guide column 525 and the second slide plate 548 is also very simple. There is no need to design a complicated structural matching between the first door panel 51 and the first swing arm 53, and between the second door panel 52 and the second swing arm 54. This not only helps to reduce the cost of the foldable mechanism 130, but also the solution of the foldable mechanism 130 is easy to implement and apply.

[0157] In addition, compared to the traditional foldable mechanism, when the foldable mechanism 130 shown in the present application is in the unfolded state, the action position point S1 of the first swing arm 53 on the first door panel 51 is far away from the rotation center of the first door panel 51, and the action position point S2 of the second swing arm 54 on the second door panel 52 is far away from the rotation center of the second door panel 52. The first swing arm 53 can more finely control the movement of the first door panel 51 relative to the base 10, and the second swing arm 54 can more finely control the movement of the second door panel 52, which helps to improve the movement reliability of the first door panel 51 and the second door panel 52, and ensure the reliability of the use of the foldable mechanism 130.

[0158] Please also read Fig.14 , Fig.14 yes Figure 6 A schematic structural diagram of the connecting assembly 60 in the foldable mechanism 130 is shown.

[0159] The connecting assembly 60 is installed in the first sliding groove 102 and the second sliding groove 103, and is slidably and rotatably connected to the first door panel 51 and the second door panel 52, and is slidably connected to the first swing arm 53 and the second swing arm 54. In this embodiment, the connecting assembly 60 includes a first fixed frame 61, a second fixed frame 62, a third swing arm 63 and a fourth swing arm 64. The first fixed frame 61 is slidably and rotatably connected to the first door panel 51, and is slidably connected to the first swing arm 53. The second fixed frame 62 is slidably and rotatably connected to the second door panel 52, and is slidably connected to the second swing arm 54. When the foldable mechanism 130 is in the unfolded state, the first fixed frame 61 is located on one side of the base 10, and is spaced apart from the base 10, and the second fixed frame 62 is located on the other side of the base 10, and is spaced apart from the base 10. Exemplarily, the first fixed frame 61 is located on the left side of the base 10, and the second fixed frame 62 is located on the right side of the base 10. The third swing arm 63 is installed in the first sliding slot 102 and is rotatably connected to the first fixing frame 61. The fourth swing arm 64 is installed in the second sliding slot 103 and is rotatably connected to the second fixing frame 62.

[0160] When the connecting assembly 60 switches between the folded state and the unfolded state, the direction in which the first fixed frame 61, the third swing arm 63, the first door panel 51 and the first swing arm 53 rotate relative to the base 10 is the first direction, and the direction in which the second fixed frame 62, the fourth swing arm 64, the second door panel 52 and the second swing arm 54 rotate relative to the base 10 is the second direction, and the second direction is opposite to the first direction. Exemplarily, when the connecting assembly 60 switches from the folded state to the unfolded state, the first fixed frame 61, the third swing arm 63, the first door panel 51 and the first swing arm 53 rotate relative to the base 10 in a counterclockwise direction, and the second fixed frame 62, the fourth swing arm 64, the second door panel 52 and the second swing arm 54 rotate relative to the base 10 in a clockwise direction. When the connecting assembly 60 switches from the unfolded state to the folded state, the first fixed frame 61, the third swing arm 63, the first door panel 51 and the first swing arm 53 rotate in a clockwise direction relative to the base 10, and the second fixed frame 62, the fourth swing arm 64, the second door panel 52 and the second swing arm 54 rotate in a counterclockwise direction relative to the base 10.

[0161] The first fixing frame 61 is provided with a first assembly notch 611, a first sliding hole 612 and a first guide groove 613. The opening of the first assembly notch 611 is located on the right side (not marked in the figure) of the first fixing frame 61. The first assembly notch 611 is recessed in the direction (negative direction of the X-axis in the figure) from the right side to the left side (not marked in the figure) of the first fixing frame 61, and passes through the left side, bottom surface and top surface (not marked in the figure) of the first fixing frame 61. In some other embodiments, the first assembly notch 611 may not pass through the bottom surface of the first fixing frame 61, and / or the first assembly notch 611 may not pass through the top surface of the first fixing frame 61.

[0162] Along the length direction of the first fixing frame 61 (the Y-axis direction in the figure), the first sliding hole 612 is located on one side of the first assembly notch 611 and is spaced apart from the first assembly notch 611. Specifically, the opening of the first sliding hole 612 is located on the right side of the first fixing frame 61. The first sliding hole 612 is recessed from the right side of the first fixing frame 61 to the left side, and passes through the top and bottom surfaces of the first fixing frame 61. It should be understood that the first sliding hole 612 is not limited to the square hole shown in the figure, and can also be a round hole or a special-shaped hole. In some other embodiments, the first sliding hole 612 may not pass through the top surface of the first fixing frame 61, and / or, the first sliding hole 612 may not pass through the bottom surface of the first fixing frame 61.

[0163] Along the length direction of the first fixing frame 61, the first guide groove 613 is located on the other side of the first assembly notch 611 and is spaced apart from the first assembly notch 611. The opening of the first guide groove 613 is located on the top surface of the first fixing frame 61. The first guide groove 613 is recessed from the top surface of the first fixing frame 61 to the direction of the bottom surface of the first fixing frame 61 (negative direction of the Z axis in the figure), and penetrates the left side surface and the front end surface of the first fixing frame 61. Among them, the first guide groove 613 is adapted to the structure of the first guide slider 513 of the first door panel 51. Exemplarily, the first guide groove 613 is an arc groove. That is, the bottom wall surface of the first guide groove 613 is an arc surface. The axis of the first guide groove 613 is parallel to the Y-axis direction. In some other embodiments, the first guide groove 613 may not penetrate the left side surface of the first fixing frame 61, and / or, the first guide groove 613 may not penetrate the front end surface of the first fixing frame 61.

[0164] The second fixing frame 62 is provided with a second assembly notch 621, a second sliding hole 622 and a second guide groove 623. The structures of the second assembly notch 621, the second sliding hole 622 and the second guide groove 623 can refer to the relevant descriptions of the first assembly notch 611, the first sliding hole 612 and the first guide groove 613 in the first fixing frame 61, and will not be repeated here. The openings of the second assembly notch 621 and the second sliding hole 622 are both located on the left side of the second fixing frame 62 (not marked in the figure).

[0165] In addition, the connecting assembly 60 further includes a first pin shaft 65 and a second pin shaft 66, wherein the first pin shaft 65 is mounted in the first assembly notch 611 of the first fixing frame 61, and the second pin shaft 66 is mounted in the second assembly notch 621 of the second fixing frame 62. The first pin shaft 65 and the second pin shaft 66 can both be round shafts, and the axes of the first pin shaft 65 and the second pin shaft 66 are both parallel to the Y-axis direction.

[0166] The third swing arm 63 includes a third sliding portion 631, a third rotating portion 632 and a third connecting portion 633. The structure of the third sliding portion 631 is adapted to the structure of the first sliding groove 102 of the base 10. The third sliding portion 631 is installed in the first sliding groove 102, and can slide and rotate relative to the base 10 in the first sliding groove 102 to achieve a sliding and rotating connection between the third sliding portion 631 and the base 10, thereby achieving a sliding and rotating connection between the third swing arm 63 and the base 10. The structure of the third rotating portion 632 is adapted to the structure of the first assembly notch 611. The third rotating portion 632 is sleeved on the first pin 65, and can rotate relative to the first fixed frame 61 to achieve a rotating connection between the third swing arm 63 and the first fixed frame 61. The third connecting portion 633 is fixedly connected between the third sliding portion 631 and the third rotating portion 632. Among them, the third sliding portion 631, the third rotating portion 632 and the third connecting portion 633 can be integrally formed.

[0167] The fourth swing arm 64 includes a fourth sliding portion 641, a fourth rotating portion 642 and a fourth connecting portion 643. The structure of the fourth swing arm 64 and the matching relationship between the fourth swing arm 64 and the second fixing frame 62 and the base 10 can refer to the structure of the third swing arm 63 and the matching relationship between the third swing arm 63 and the first fixing frame 61 and the base 10, which will not be repeated here.

[0168] Please also read Fig. 9 and Fig.10 In the first door panel 51, the first plate body 511 may be located at the top side of the first fixing frame 61, and the first guide slider 513 may be installed in the first guide groove 613 of the first fixing frame 61, and may slide and rotate relative to the first fixing frame 61 in the first guide groove 613, so as to realize the sliding and rotating connection between the first door panel 51 and the first fixing frame 61, so as to improve the assembly stability between the first door panel 51 and the connecting assembly 60. Among them, the first protrusion 512, the first guide column 514 and the second guide column 515 may be received in the first sliding hole 612 of the first fixing frame 61.

[0169] In the second door panel 52, the second plate body 521 can be located at the top side of the second fixing frame 62, and the second guide slider 523 can be installed in the second guide groove 623 of the second fixing frame 62, and can slide and rotate relative to the second fixing frame 62 in the second guide groove 623, so as to realize the sliding and rotating connection between the second door panel 52 and the second fixing frame 62, so as to improve the assembly stability between the second door panel 52 and the connecting assembly 60. Among them, the second protrusion 522, the third guide column 524 and the fourth guide column 525 can be received in the second sliding hole 622 of the second fixing frame 62.

[0170] In some other embodiments, the first door panel 51 may also be provided with a first guide groove, and the first fixed frame 61 may also include a first guide slider, and the cooperation between the first guide groove and the first guide slider can also be utilized to achieve a sliding and rotating connection between the first door panel 51 and the first fixed frame 61, and / or, the second door panel 52 may also be provided with a second guide groove, and the second fixed frame 62 may also include a second guide slider, and the cooperation between the second guide groove and the second guide slider can also be utilized to achieve a sliding and rotating connection between the second door panel 52 and the second fixed frame 62. The present application does not impose any specific restrictions on the manner of achieving the sliding and rotating connection between the first door panel 51 and the first fixed frame 61, and between the second door panel 52 and the second fixed frame 62.

[0171] In the first swing arm 53, the first sliding portion 532 is inserted into the first sliding hole 612 of the first fixing frame 61, and can slide relative to the first fixing frame 61 in the first sliding hole 612, so as to achieve a sliding connection between the first sliding portion 532 and the first fixing frame 61, and further achieve a sliding connection between the first swing arm 53 and the first fixing frame 61. In the second swing arm 54, the second sliding portion 542 is inserted into the second sliding hole 622 of the second fixing frame 62, and can slide relative to the second fixing frame 62 in the second sliding hole 622, so as to achieve a sliding connection between the second sliding portion 542 and the second fixing frame 62, and further achieve a sliding connection between the second swing arm 54 and the second fixing frame 62. In other words, the first swing arm 53 and the second swing arm 54 can be used as both the door panel swing arm of the door panel assembly 50 and the auxiliary swing arm of the connecting assembly 60, so as to omit the auxiliary swing arm of the connecting assembly 60, simplify the structure of the foldable mechanism 130, and help to achieve a lightweight design of the foldable terminal 1000.

[0172] In the foldable mechanism 130 shown in this embodiment, a first guide column 514 and a second guide column 515 are arranged on the first door panel 51, a first slide plate 538 is designed on the first swing arm 53, a third guide column 524 and a fourth guide column 525 are arranged on the second door panel 52, and a second slide plate 548 is designed on the second swing arm 54. The first guide column 514 and the second guide column 515 are used to clamp the first slide plate 538, and the third guide column 524 and the fourth guide column 525 are used to clamp the second slide plate 548. When the foldable terminal 1000 is in the unfolded state, the first guide post 514 and the second guide post 515 clamp the unfolded position 5381 of the first slide plate 538, the third guide post 524 and the fourth guide post 525 clamp the unfolded position 5481 of the second slide plate 548, the action point of the first swing arm 53 on the first door panel 51 is far away from the rotation center of the first door panel 51, and the action point of the second swing arm 54 on the second door panel 52 is far away from the rotation center of the second door panel 52. The first swing arm 53 can more finely control the movement of the first door panel 51 relative to the base 10, and the second swing arm 54 can more finely control the movement of the second door panel 52, which helps to improve the movement reliability of the first door panel 51 and the second door panel 52, and ensure the reliability of the foldable mechanism 130.

[0173] In addition, when the foldable terminal 1000 is in the unfolded state, the action point of the first swing arm 53 on the first door panel 51 and the action point of the second swing arm 54 on the second door panel 52 are both close to the base 10, which can reduce the torque borne by the first door panel 51 and the second door panel 52, reduce the deformation of the first door panel 51 and the second door panel 52 caused by the torque, ensure the flatness of the first door panel 51 and the second door panel 52, and effectively improve the flatness of the display screen 200 and the display effects such as light and shadow.

[0174] See also Figures 15 to 18 , Fig.15 yes Figure 1 The foldable device 100 in the foldable terminal 1000 is a schematic structural diagram of the foldable mechanism 130 in the second embodiment. Fig.16 yes Figure 2 The foldable device 100 in the foldable terminal 1000 is a schematic structural diagram of the foldable mechanism 130 in the second embodiment. Fig.17 yes Fig.16 The schematic diagram of the structure of the door panel assembly 50 in the foldable mechanism 130 is shown. Fig.18 yes Fig.17 The door panel assembly 50 is shown as a schematic structural diagram at another angle.

[0175] The foldable mechanism 130 shown in this embodiment is different from the foldable mechanism 130 shown in the first embodiment in the door panel assembly 50 in that the first protrusion 512 of the first door panel 51 is provided with a third sliding hole 519, and the opening of the third sliding hole 519 is located on the surface of the first protrusion 512 away from the first guide column 514 and the second guide column 515. The third sliding hole 519 is recessed from the surface of the first protrusion 512 away from the first guide column 514 and the second guide column 515 toward the first guide column 514 and the second guide column 515, and passes through the left side and the right side of the first protrusion 512. The third sliding hole 519 is an arc-shaped hole, and the axis of the third sliding hole 519 is parallel to the Y-axis direction. In addition, the third sliding hole 519 has a folding position and an unfolding position, and the folding position of the third sliding hole 519 is located inside the unfolding position of the third sliding hole 519. Exemplarily, the folded position of the third sliding hole 519 is located at the innermost side of the third sliding hole 519, and the unfolded position of the third sliding hole 519 is located at the outermost side of the third sliding hole 519. In some other embodiments, the third sliding hole 519 may not penetrate the left side of the first protrusion 512.

[0176] The second protrusion 522 of the second door panel 52 may also be provided with a fourth sliding hole 529, the opening of which is located on the surface of the second protrusion 522 away from the third guide column 524 and the fourth guide column 525. The structure of the fourth sliding hole 529 may refer to the relevant description of the third sliding hole 519 in the first door panel 51, and will not be repeated here.

[0177] The first sliding portion 532 of the first swing arm 53 further includes a first sliding shaft 539, which is fixedly connected to the side of the first sub-sliding portion 536 facing the second sub-sliding portion 537, and is spaced apart from the second sub-sliding portion 537 and the first sliding plate 538. Specifically, the first sliding shaft 539 is connected to an end of the second sub-sliding portion 537 away from the first connecting portion 533, and is spaced apart from the first connecting portion 533. The structure of the first sliding shaft 539 is compatible with the structure of the third sliding hole 519. Exemplarily, the first sliding shaft 539 is a circular shaft, and the axis of the first sliding shaft 539 is parallel to the Y-axis direction.

[0178] In the second swing arm 54, the second sliding part 542 further includes a second sliding shaft 549, which is fixedly connected to a side of the third sub-sliding part 546 facing the fourth sub-sliding part 547, and is spaced apart from the fourth sub-sliding part 547 and the second sliding plate 548. The structure of the second sliding shaft 549 can refer to the relevant description of the first sliding shaft 539 in the first swing arm 53, and will not be repeated here.

[0179] The first sliding shaft 539 can be inserted into the third sliding hole 519 and can slide in the third sliding hole 519 between the folding position of the third sliding hole 519 and the unfolding position of the third sliding hole 519, so as to slide and rotate relative to the first door panel 51, so as to realize the sliding and rotating connection between the first sliding portion 532 and the first door panel 51, and further realize the sliding and rotating connection between the first swing arm 53 and the first door panel 51, so as to improve the stability of the sliding and rotating connection between the first swing arm 53 and the first door panel 51. The second sliding shaft 549 can be inserted into the fourth sliding hole 529 and can slide in the fourth sliding hole 529 between the folding position and the unfolding position of the fourth sliding hole 529, so as to slide and rotate relative to the second door panel 52, so as to realize the sliding and rotating connection between the second sliding portion 542 and the second door panel 52, and further realize the sliding and rotating connection between the second swing arm 54 and the second door panel 52, so as to improve the stability of the sliding and rotating connection between the second swing arm 54 and the second door panel 52.

[0180] See also Fig.19 and Fig. 20 , Fig.19 yes Fig.15 The foldable mechanism 130 is a schematic structural diagram after being cut apart along IV-IV. Fig. 20 yes Fig.16 The foldable mechanism 130 is a schematic structural diagram after being cut open along VV.

[0181] like Fig.19 As shown, when the foldable mechanism 130 is in the folded state, the door panel assembly 50 is in the folded state, the first slide shaft 539 is located at the folded position of the third slide hole 519, and the second slide shaft 549 is located at the folded position of the fourth slide hole 529. Fig. 20 As shown, when the foldable mechanism 130 is in the unfolded state, the door panel assembly 50 is in the unfolded state, the first sliding shaft 539 is located in the unfolded position of the third sliding hole 519 , and the second sliding shaft 549 is located in the unfolded position of the fourth sliding hole 529 .

[0182] During the folding process of the foldable mechanism 130, for example, when the foldable mechanism 130 switches from the unfolded state to the folded state, when the door panel assembly 50 switches from the unfolded state to the folded state, the first sliding shaft 539 slides from the unfolded position to the folded position in the third sliding hole 519, and the second sliding shaft 549 slides from the unfolded position to the folded position in the fourth sliding hole 529.

[0183] During the unfolding process of the foldable mechanism 130, for example, during the process of the foldable mechanism 130 switching from the folded state to the unfolded state, and during the process of the door panel assembly 50 switching from the folded state to the unfolded state, the first sliding shaft 539 slides from the folded position to the unfolded position in the third sliding hole 519, and the second sliding shaft 549 slides from the folded position to the unfolded position in the fourth sliding hole 529.

[0184] In the foldable mechanism 130 shown in this embodiment, a first guide post 514, a second guide post 515 and a third slide hole 519 are designed on the first door panel 51, a first slide plate 538 on the first swing arm 53 cooperates with the first guide post 514 and the second guide post 515, and a first slide shaft 539 on the first swing arm 53 cooperates with the third slide hole 519 to realize the sliding and rotational connection between the first door panel 51 and the first swing arm 53, a third guide post 524, a fourth guide post 525 and a fourth slide hole 529 are designed on the second door panel 52, The second slide plate 548 on the second swing arm 54 cooperates with the third guide column 524 and the fourth guide column 525, and the second sliding shaft 549 on the second swing arm 54 cooperates with the fourth sliding hole 529 to realize the sliding and rotating connection between the second door panel 52 and the second swing arm 54, thereby ensuring the stability of the sliding and rotating connection between the first door panel 51 and the first swing arm 53, and between the second door panel 52 and the second swing arm 54, improving the assembly stability of the door panel assembly 50, and thereby improving the reliability of the foldable mechanism 130.

[0185] The above description is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application; in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A foldable mechanism, characterized in that: The invention comprises a base, a first door panel and a first swing arm, wherein the first door panel is located at one side of the base, the first door panel comprises a first plate body, a first guide column and a second guide column, the first guide column and the second guide column are both located at the bottom side of the first plate body and are both fixedly connected to the first plate body, the first guide column and the second guide column are spaced apart and arranged opposite to each other, the first swing arm comprises a first rotating part and a first slide plate, the first rotating part is rotatably connected to the base, the first slide plate is fixedly connected to the first rotating part and has an unfolding position and a folding position, the folding position of the first slide plate is located outside the unfolding position of the first slide plate, the first slide plate is clamped between the first guide column and the second guide column, and can slide and rotate relative to the first guide column and the second guide column; When the foldable mechanism is in an unfolded state, the unfolded position of the first slide plate is clamped between the first guide post and the second guide post; When the foldable mechanism is in a folded state, the folded position of the first slide plate is clamped between the first guide post and the second guide post.

2. The foldable mechanism according to claim 1, characterized in that: The unfolded position of the first slide plate is also located on the top side of the folded position of the first slide plate.

3. The foldable mechanism according to claim 1 or 2, characterized in that: The first guide post has a first clamping surface facing the second guide post, and the second guide post has a second clamping surface facing the first guide post. Both the first clamping surface and the second clamping surface are arc-shaped surfaces.

4. The foldable mechanism according to any one of claims 1 to 3, characterized in that: The foldable mechanism further comprises a first fixing frame, wherein the first fixing frame is located at the bottom side of the first door panel; The first swing arm further includes a first sliding portion, which includes the first sliding plate and is slidably connected to the first fixing frame.

5. The foldable mechanism according to claim 4, characterized in that: The first sliding part also includes a first sub-sliding part and a second sub-sliding part. The first sub-sliding part and the second sub-sliding part are arranged at an interval and are both slidably connected to the first fixed frame. The first sliding plate is fixedly connected to a side of the second sub-sliding part facing the first sub-sliding part and is arranged at an interval from the first sub-sliding part.

6. The foldable mechanism according to any one of claims 1 to 5, characterized in that: The foldable mechanism further includes a second door panel and a second swing arm, the second door panel is located at one side of the base and is spaced apart from the first door panel, the second door panel includes a second plate body, a third guide column and a fourth guide column, the third guide column and the fourth guide column are both located at the bottom side of the second plate body and are fixedly connected to the second plate body, and the third guide column and the fourth guide column are spaced apart and arranged opposite to each other; The second swing arm includes a second rotating portion and a second slide plate, the second rotating portion is rotatably connected to the base, the second slide plate has an unfolded position and a folded position, the folded position of the second slide plate is located outside the unfolded position of the second slide plate, the second slide plate is clamped between the third guide post and the fourth guide post, and can slide and rotate relative to the third guide post and the fourth guide post; When the foldable mechanism is in an unfolded state, the unfolded position of the second slide plate is clamped between the third guide post and the fourth guide post; When the foldable mechanism is in a folded state, the folded position of the second slide plate is clamped between the third guide post and the fourth guide post.

7. The foldable mechanism according to claim 6, characterized in that: The foldable mechanism further comprises a support plate, wherein the support plate is mounted on the base; When the foldable mechanism is in an unfolded state, the top surface of the first plate body, the top surface of the second plate body and the top surface of the support plate are flush.

8. The foldable mechanism according to claim 7, characterized in that: When the foldable mechanism is in a folded state, the first door panel, the second door panel and the support panel enclose an escape space, and a cross section of the escape space is in a "water drop shape".

9. The foldable mechanism according to any one of claims 1 to 8, characterized in that: The first plate body is provided with a third sliding hole, the third sliding hole has an unfolded position and a folded position, and the folded position of the third sliding hole is located inside the unfolded position of the third sliding hole; The first swing arm further includes a first sliding shaft, the first sliding shaft is fixedly connected to the first rotating part and is spaced apart from the first sliding plate, the first sliding shaft is inserted into the third sliding hole, and can slide relative to the first plate body in the third sliding hole; When the foldable mechanism is in an unfolded state, the first sliding shaft is located at an unfolded position of the third sliding hole; When the foldable mechanism is in a folded state, the first sliding shaft is located at a folded position of the third sliding hole.

10. A foldable terminal, characterized in that: The invention comprises a first shell, a second shell and a foldable mechanism according to any one of claims 1 to 9, wherein the foldable mechanism is connected between the first shell and the second shell.

11. The foldable terminal according to claim 10, characterized in that: The foldable terminal also includes a first circuit board, a second circuit board and a connecting circuit board, the first circuit board is arranged on the inner side of the first shell, the second circuit board is arranged on the inner side of the second shell, the connecting circuit board passes through the inner side of the foldable mechanism, is spaced apart from the first swing arm, and is electrically connected between the first circuit board and the second circuit board.

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