Foldable mechanism and foldable terminal

Abstract

The application provides a foldable mechanism and a foldable terminal, which are used for improving the movement control precision of a swing arm on a door plate, improving the movement reliability of the door plate, and ensuring the use reliability of the foldable mechanism. A first door plate is located on one side of a base. A first guide column and a second guide column are both located on the bottom side of a first plate body and are fixedly connected with the first plate body. The first guide column and the second guide column are spaced apart and oppositely arranged. A first rotating part is rotationally connected with the base. A first sliding plate is fixedly connected with the first rotating part and has an unfolded position and a folded position. The folded position of the first sliding plate is located on the outside of the unfolded 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 folded 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

[0002] With the progress of science and technology, the era of large-screen intelligent terminals has arrived. Foldable terminals are favored by users due to their large screens and convenient portability. At present, foldable terminals often use foldable mechanisms to realize folding and unfolding, and use the cooperation between the swing arm and the door plate to control the movement of the door plate to support the display screen of the foldable terminal. However, during the switching process between the unfolded state and the folded state of the foldable terminal, the movement control of the swing arm on the door plate is not accurate enough, and the movement reliability of the door plate is poor, which affects the use reliability of the foldable mechanism. SUMMARY

[0003] The present application provides a foldable mechanism and a foldable terminal for improving the movement control accuracy of the swing arm on the door plate, improving the movement reliability of the door plate, and ensuring the use reliability of the foldable mechanism.

[0004] In a first aspect, the present application provides a foldable mechanism, comprising a base, a first door plate and a first swing arm. The first door plate is located on one side of the base, and the first door plate comprises a first plate body, a first guide column and a second guide column, both the first guide column and the second guide column are located on the bottom side of the first plate body, and both are fixedly connected with the first plate body, and the first guide column and the second guide column are spaced apart and oppositely arranged. The first swing arm comprises a first rotating part and a first sliding plate, the first rotating part is rotationally connected with the base, and the first sliding plate is fixedly connected to the first rotating part and has an unfolded position and a folded position, and the folded position of the first sliding plate is located on the outside of the unfolded 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.

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

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

[0007] When the foldable mechanism shown in the present application is in the unfolded state, the first guide column and the second guide column clamp the unfolded position of the third sub-sliding part, the action point of the first swing arm on the first door plate is far away from the rotation center of the first door plate, the first swing arm can more finely control the movement of the first door plate relative to the base, which helps to improve the movement reliability of the first door plate and ensure the use reliability of the foldable mechanism. Furthermore, the structure design of the first guide column and the second guide column on the first door plate and the first sliding plate on the first swing arm is simple, the matching structure between the first guide column, the second guide column and the first sliding plate is also simple, and there is no need to design a complex structure matching between the first door plate and the first swing arm, which not only helps to reduce the cost of the foldable mechanism, but also makes the scheme of 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 action point of the first swing arm on the first door plate is close to the base, which can reduce the torque borne by the first door plate due to the abutment of the connected circuit board, reduce the deformation of the first door plate due to the torque, ensure the flatness of the first door plate, and effectively improve the flatness and light and shadow display effect of the display screen.

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

[0010] When the foldable mechanism is in the unfolded state, the first sliding plate of the first swing arm can press the first door plate downward under the action of gravity, reduce the torque borne by the first door plate due to the abutment of the connected circuit board upward, reduce the deformation of the first door plate due to the torque, ensure the flatness of the first door plate, and effectively improve the flatness and light and shadow display effect of the display screen.

[0011] In one embodiment, the first guide column has a first clamping surface facing the second guide column, the second guide column has a second clamping surface facing the first guide column, and the first clamping surface and the second clamping surface are both arc surfaces to realize the sliding and rotating connection between the first guide column, the second guide column and the first sliding plate.

[0012] Among them, the axis of the first clamping surface and the second clamping surface is parallel to the folding direction of the foldable mechanism. For example, 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 comprises a first fixed frame, and the first fixed frame is located on the bottom side of the first door plate.

[0014] The first swing arm further comprises a first sliding part, and the first sliding part comprises a first sliding plate and is in sliding connection with the first fixed frame.

[0015] The first swing arm can be used as a door panel swing arm of the door panel assembly and a secondary swing arm of the connecting assembly, so that the secondary swing arm of the connecting assembly is omitted, the structure of the foldable mechanism is simplified, and the lightweight design of the foldable terminal is facilitated.

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

[0017] In an embodiment, the first sliding part further 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 in a spaced manner and are both in sliding connection with the first fixed frame, the first sliding plate is fixedly connected to one side of the second sub-sliding part facing the first sub-sliding part and is arranged in a spaced manner with the first sub-sliding part to avoid interference between the third sliding plate and the first sliding part and ensure the stability of the cooperation between the first sliding part and the first fixed frame.

[0018] In an 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 arranged in a spaced manner with the first door panel. The second door panel includes a second panel body, a third guide column and a fourth guide column, the third guide column and the fourth guide column are both located on the bottom side of the second panel body and are fixedly connected with the second panel body, and the third guide column and the fourth guide column are arranged in a spaced and opposite manner.

[0019] The second swing arm includes a second rotating part and a second sliding plate. The second rotating part is in rotating connection with the base. The second sliding plate has an unfolded position and a folded position. The folded position of the second sliding plate is located on the outside of the unfolded position of the second sliding plate. The second sliding 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 sliding plate is clamped between the third guide column and the fourth guide column.

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

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

[0023] In addition, when the foldable terminal is in the unfolded state, the action point of the second swing arm on the second door plate is close to the base, which can reduce the torque borne by the second door plate, reduce the deformation of the second door plate caused by the torque, ensure the flatness of the second door plate, and effectively improve the flatness and light and shadow display effect of the display screen.

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

[0025] When the foldable mechanism is in the unfolded state, the second sliding plate of the second swing arm can press the second door plate downward under the action of gravity, reduce the torque borne by the second door plate due to the upward abutment of the connecting circuit board, reduce the deformation of the second door plate caused by the torque, ensure the flatness of the second door plate, and effectively improve the flatness and light and shadow display effect of the display screen.

[0026] In one embodiment, the third guide column has a third clamping surface facing the fourth guide column, and the fourth guide column has a fourth clamping surface facing the third guide column, both the third clamping surface and the fourth clamping surface are arc surfaces, so as to realize the sliding and rotating connection between the third guide column, the fourth guide column and the second sliding plate.

[0027] In one embodiment, the third clamping surface and the fourth clamping surface are arc surfaces, and the axes of the third clamping surface and the fourth clamping surface are parallel to the folding direction of the foldable mechanism. For example, 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 comprises a second fixed frame, and the second fixed frame is located on the bottom side of the second door plate.

[0029] The second swing arm further comprises a second sliding part, and the second sliding part comprises a second sliding plate and is in sliding connection with the second fixed frame.

[0030] The second swing arm can be used as a door plate swing arm of the door plate assembly and also as a secondary swing arm of the connecting assembly, so that the secondary swing arm of the connecting assembly is omitted, the structure of the foldable mechanism is simplified, and the lightweight design of the foldable terminal is facilitated.

[0031] The second fixing frame is provided with a second sliding hole, the second sliding portion 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 portion 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. 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, so as to jointly support the foldable part of the display screen and 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, 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 further includes a first sliding shaft, which is fixedly connected to the first rotating part and spaced apart from the first slide 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 application, the first guide column, the second guide column and the third sliding hole are designed on the first door plate, the third sub-sliding part on the first swing arm cooperates with the first guide column and the second guide column, and the first sliding shaft on the first swing arm cooperates with the third sliding hole to realize the sliding and rotating connection between the first door plate and the first swing arm, thereby ensuring the stability of the sliding and rotating connection between the first door plate and the first swing arm, improving the assembly stability of the door plate assembly, and further improving the use reliability of the foldable mechanism.

[0041] In an 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 further comprises a second sliding shaft, the second sliding shaft is fixedly connected to the second rotating part and is 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 folded position of the fourth sliding hole.

[0045] In the foldable mechanism shown in the application, the third guide column, the fourth guide column and the fourth sliding hole are designed on the second door plate, the sixth sub-sliding part on the second swing arm cooperates with the third guide column and the fourth guide column, and the second sliding shaft on the second swing arm cooperates with the fourth sliding hole to realize the sliding and rotating connection between the second door plate and the second swing arm, thereby ensuring the stability of the sliding and rotating connection between the second door plate and the second swing arm, improving the assembly stability of the door plate assembly, and further improving the use reliability of the foldable mechanism.

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

[0047] When the foldable terminal shown in the application is in the unfolded state, the first guide column and the second guide column clamp the unfolded position of the third sub-sliding part, the action point of the first swing arm on the first door plate is far away from the rotation center of the first door plate, the first swing arm can more finely control the movement of the first door plate relative to the base, which helps to improve the movement reliability of the first door plate and ensure the use reliability of the foldable terminal. Furthermore, the structure design of the first guide column and the second guide column on the first door plate and the first sliding plate on the first swing arm is simple, the cooperation structure between the first guide column and the second guide column and the first sliding plate is also simple, and no complex structure cooperation is needed between the first door plate and the first swing arm. Not only does this help to reduce the cost of the foldable terminal, but also the scheme of the foldable terminal is easy to implement and apply.

[0048] In addition, when the foldable terminal is in the unfolded state, the action position point of the first swing arm on the first door plate is close to the base, which can reduce the torque borne by the first door plate due to the abutment of the connecting circuit board, reduce the deformation of the first door plate due to the torque, ensure the flatness of the first door plate, and effectively improve the flatness and light and shadow display effect of the display screen.

[0049] In an embodiment, the foldable terminal further comprises 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 arranged on 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 the end of the first door plate and the second door plate close to the base upwards, the cooperation between the first guide column and the second guide column on the first door plate and the first sliding plate on the first swing arm, and the cooperation between the third guide column and the fourth guide column on the second door plate and the second sliding plate on the second swing arm, can reduce the torque borne by the first door plate and the second door plate due to the abutment of the connecting circuit board, reduce the deformation of the first door plate and the second door plate due to the torque, ensure the flatness of the first door plate and the second door plate, and effectively improve the flatness and light and shadow display effect of the display screen. BRIEF DESCRIPTION OF DRAWINGS

[0051] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will illustrate the drawings needed to be used by the embodiments of the present application.

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

[0053] Figure 2 is Figure 1 is a structural schematic diagram of the foldable terminal in the unfolded state;

[0054] Figure 3 is Figure 2 is a partial cross-sectional structural schematic diagram of the foldable terminal after being cut along I-I;

[0055] Figure 4 is Figure 1 is a partial structural schematic diagram of the foldable mechanism of the foldable device in the foldable terminal in the first embodiment;

[0056] Figure 5 is Figure 2 is a partial structural schematic diagram of the foldable mechanism of the foldable device in the foldable terminal in the first embodiment;

[0057] Figure 6 is a structural schematic diagram of the folding mechanism shown in FIG. 1; Figure 5 is an exploded structural schematic diagram of the folding mechanism shown in FIG. 1;

[0058] Figure 7 is a structural schematic diagram of the folding mechanism shown in FIG. 1; Figure 6 is a structural schematic diagram of the base, damping assembly and synchronization assembly in the folding mechanism shown in FIG. 1;

[0059] Figure 8 is a structural schematic diagram of the folding mechanism shown in FIG. 1; Figure 6 is a structural schematic diagram of the support plate in the folding mechanism shown in FIG. 1;

[0060] Figure 9 is a structural schematic diagram of the folding mechanism shown in FIG. 1; Figure 6 is a structural schematic diagram of the door plate assembly in the folding mechanism shown in FIG. 1;

[0061] Figure 10 is a structural schematic diagram of the door plate assembly shown in FIG. 1 from another angle; Figure 9

[0062] Figure 11 is a structural schematic diagram of the folding mechanism shown in FIG. 1 along II-II; Figure 4

[0063] Figure 12 is a structural schematic diagram of the folding mechanism shown in FIG. 1 along III-III; Figure 5

[0064] Figure 13 is a structural schematic diagram of the folding mechanism shown in FIG. 1; Figure 2

[0065] Figure 14 is a structural schematic diagram of the folding mechanism shown in FIG. 1; Figure 6

[0066] Figure 15 is a structural schematic diagram of the folding mechanism shown in FIG. 1; Figure 1

[0067] Figure 16 is a structural schematic diagram of the folding mechanism shown in FIG. 1; Figure 2

[0068] Figure 17 is a structural schematic diagram of the folding mechanism shown in FIG. 1; Figure 16

[0069] Figure 18 is a structural schematic diagram of the folding mechanism shown in FIG. 1 from another angle; Figure 17

[0070] ​​​​​​​​​Figure 19 yes Figure 15 A schematic structural diagram of the foldable mechanism shown after being cut apart along IV-IV;

[0071] Figure 20 yes Figure 16 The structure diagram of the foldable mechanism shown is after being cut open along VV. DETAILED DESCRIPTION

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

[0073] See also Figure 1 and Figure 2 , Figure 1 is a structural diagram of the 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 can be a foldable electronic product such as a mobile phone, tablet computer, personal computer, multimedia player, e-book reader, laptop computer, vehicle-mounted device, or wearable device. In this embodiment, the foldable terminal 1000 is a foldable mobile phone. That is, the foldable terminal 1000 is a mobile phone that can switch between a folded state and an unfolded state.

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

[0077] in, Figure 1The foldable terminal 1000 is shown in a folded state, wherein the size of the foldable terminal 1000 along the X-axis direction is relatively small, and the foldable terminal 1000 is easy to carry. Figure 2 The foldable terminal 1000 is shown in an unfolded state. Figure 2 The unfolding angle α of the foldable terminal 1000 is shown to be 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 this application are allowed to have slight deviations. For example, Figure 2 The unfolding angle α of the foldable terminal 1000 is shown as 180 degrees, which means that α can be 180 degrees or approximately 180 degrees, such as 170 degrees, 175 degrees, 185 degrees, and 190 degrees. The angles described below by way of example can be understood in the same way.

[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 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, which is mounted on the foldable device 100. The display screen 200 includes a display surface 201 facing away from the foldable device 100. 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. The foldable portion 230 is connected between the first and second display portions 210 and 220. The foldable portion 230 is bendable about the Y-axis.

[0081] like Figure 1 As shown, when the foldable terminal 1000 is in the folded state, both the foldable device 100 and the display screen 200 are folded, the first display portion 210 and the second display portion 220 are positioned opposite each other, and the foldable portion 230 is bent. In this state, the exposed area of ​​the display screen 200 is relatively small, which greatly reduces the probability of damage to the display screen 200 and effectively protects the display screen 200.

[0082] like Figure 2As shown, when the foldable terminal 1000 is in the unfolded state, both the foldable device 100 and the display screen 200 are in the unfolded state, the first display part 210 and the second display part 220 are relatively unfolded, and the foldable part 230 is unfolded without being bent. At this time, the included angle between the first display part 210 and the second display part 220, the included angle between the first display part 210 and the foldable part 230, and the included angle between the second display part 220 and the foldable part 230 are all a, the display screen 200 has a large display area, large-screen display of the foldable terminal 1000 is realized, and the user experience is improved.

[0083] It should be understood that the foldable terminal 1000 shown in the embodiments of the present application is folded in the inward folding manner, and when the foldable terminal 1000 is in the folded state, the display screen 200 is located at the inner side of the foldable device 100. In other embodiments, the foldable terminal 1000 can also be folded in the outward folding manner, and when the foldable terminal 1000 is in the folded state, the display screen 200 is located at 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 realize the rotational connection between the first housing 110 and the second housing 120. Specifically, the first housing 110 carries the first display part 210, and the second housing 120 carries the second display part 220. In other words, the first display part 210 is mounted to the first housing 110, and the second display part 220 is mounted to the second housing 120. The foldable mechanism 130 is arranged opposite to the foldable part 230.

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

[0086] Please refer to Figure 3 , Figure 3 is Figure 2A partial cross-sectional structure diagram of the foldable terminal 1000 is shown after being cut along I-I. Wherein, cutting along I-I means cutting along the plane where I-I line is located, and other similar descriptions in this paper can be understood in the same way.

[0087] The first circuit board 140 is arranged in the interior of the first housing 110, and the second circuit board 150 is arranged in the interior of the first housing 110. The connecting circuit board 160 can be arranged in the interior of the foldable mechanism 130 and electrically connected between the first circuit board 140 and the second circuit board 150 to realize the electrical connection between the first circuit board 140 and the second circuit board 150. Wherein, the connecting circuit board 160 is arranged in a spaced manner with the first swing arm (not shown in the figure), the second swing arm (not shown in the figure), the third swing arm (not shown in the figure) and the fourth swing arm (not shown in the figure). 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. components, to reduce the influence of the arrangement of the connecting circuit board 160 in the interior of the foldable mechanism 130 on the movement of the foldable mechanism 130.

[0088] In this embodiment, the connecting circuit board 160 includes a first end portion 161, a second end portion 162 and a flexible connecting portion 163, and the flexible connecting portion 163 is connected between the first end portion 161 and the second end portion 162. The first end portion 161 can be arranged in the interior of the first housing 110 and electrically connected with the first circuit board 140. The second end portion 162 can be arranged in the interior of the second housing 120 and electrically connected with the second circuit board 150. The flexible connecting portion 163 can be arranged in the interior of the foldable mechanism 130. Specifically, the flexible connecting portion 163 is arranged between the first door plate (not shown in the figure) and the first fixed frame (not shown in the figure), the support plate (not shown in the figure) and the base (not shown in the figure), and the second door plate (not shown in the figure) and the second fixed frame (not shown in the figure) of the foldable mechanism 130. Wherein, the structures of the support plate, the first door plate, the second door plate, the third swing arm, the second swing arm, the first fixed frame, the second fixed frame, the first swing arm and the second swing arm, and the matching structures between each other can be referred to the related description in the following.

[0089] For example, the connecting circuit board 160 can be a flexible printed circuit (FPC). In some other embodiments, part of the connecting circuit board 160 can be a flexible printed circuit, and part of the connecting circuit board 160 can be a rigid printed circuit, for example, the first end portion 161 and / or the second end portion 162 can be a rigid printed circuit, and the flexible connecting portion 163 can be a flexible printed circuit, which is not limited in this 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 existence, only existence, and both existence and both existence. The following description of "and / or" should be understood in the same way.

[0091] The foldable terminal 1000 utilizes a folding mechanism 130 to achieve folding, unfolding, and hovering. By controlling the movement of the first door panel relative to the first mounting frame and the second door panel relative to the second mounting frame, the angles of the first door panel and the second mounting frame are changed. When the foldable terminal 1000 is folded, a "teardrop angle" is formed between the first and second door panels and the support plate to accommodate the foldable portion 230 of the display 200. When the foldable terminal 1000 is unfolded, the first, second, and support plates collectively support the foldable portion 230 of the display 200. Therefore, the movement accuracy and flatness of the first and second door panels affect the flatness of the display 200 and display effects such as light and shadow.

[0092] In traditional foldable mechanisms, a structure that cooperates with the door panel is often designed on the swing arm, base or 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 Q1 and Q2 shown in the figure are far away from the base, and the connecting circuit board will push the door panel upwards to the end close to the base (such as Figure 3 The door panel's end, which is located at the base, bulges upward, resulting in poor flatness between the door panel and the support plate, affecting the display's flatness and visual quality. Furthermore, when the foldable mechanism switches from a folded to an unfolded state, the swing arm's precision in controlling the door panel's movement is poor, as the structure that engages the door panel and the door panel's center of rotation is relatively close to the swing arm's position. This results in poor door panel movement reliability, which in turn reduces the reliability of the foldable mechanism.

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

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

[0095] The folding mechanism 130 includes a base 10, a damping assembly 20, a synchronization assembly 30, a support plate 40, a door plate assembly 50, and a connecting assembly 60, all of which are mounted on the base 10. For example, the length direction of the base 10 is parallel to the Y-axis direction.

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

[0097] It should be noted that only one damping assembly 20 is shown in the figure. In this embodiment, there can 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 can be referred to the related description of the damping assembly 20 below, or each damping assembly 20 and the damping assembly 20 below can be different in the detailed structure or position arrangement of each component.

[0098] The synchronization assembly 30 is mounted on the inner side of the base 10 and can be connected with the damping assembly 20. The synchronization assembly 30 can ensure the synchronous rotation of each component in the folding mechanism 130 when the folding mechanism 130 switches between the folded state and the flattened state. The synchronization assembly 30 can ensure the synchronous rotation of the first housing 110 and the second housing 120 when the foldable terminal 1000 switches between the folded state and the flattened state during the use of the foldable terminal 1000, thereby improving the user's experience.

[0099] It should be noted that the figure only shows one synchronization component 30. In this embodiment, there can also 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 can all refer to the relevant description of the synchronization component 30 in the following text. Alternatively, each synchronization component 30 and the synchronization component 30 in the following text may also be different in 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. For example, 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 this application refers to both "full coverage" and "partial coverage", and the related descriptions below should 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 engaged with the synchronization assembly 30. It should be noted that the "connection" mentioned in the description of the foldable mechanism 130 in the embodiment of the present application may include "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. For example, the connecting assembly 60 is slidably and rotatably connected to the base 10, and is also 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 fold or unfold relative to the base 10.

[0103] It should be noted that the figure only shows one connecting component 60. In this embodiment, there can also 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 and the connecting component 60 in the following text may also be different in 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 plate assembly 50 and the connecting assembly 60 are both in the unfolded state. During the process of switching the foldable mechanism 130 from the folded state to the unfolded state, the door plate assembly 50 and the connecting assembly 60 are both switched from the folded state to the unfolded state. During the process of switching the foldable mechanism 130 from the unfolded state to the folded state, the door plate assembly 50 and the connecting assembly 60 are both switched from the unfolded state to the folded state. During the process of switching the foldable mechanism 130 between the folded state and the unfolded state, the damping assembly 20 can provide damping force, and the synchronization assembly 30 can ensure the synchronous rotation of the components in the door plate assembly 50 and the connecting assembly 60.

[0105] Please refer to Figure 6 and Figure 7 , Figure 7 is Figure 6 As shown in the foldable mechanism 130, the structure diagram of the base 10, the damping assembly 20 and the synchronization assembly 30.

[0106] The base 10 is provided with a mounting groove 101, a first sliding groove 102, a second sliding groove 103 and a fixing groove 104. The openings of the mounting groove 101, the first sliding groove 102, the second sliding groove 103 and the fixing groove 104 are located on the top surface (not marked in the figure) of the base 10. The mounting groove 101, the first sliding groove 102, the second sliding groove 103 and the fixing groove 104 are recessed from the top surface to the bottom surface (not marked in the figure) of the base 10 (the negative direction of the Z axis shown in the figure). 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 (the X axis direction shown in the figure) of the base 10, the first sliding groove 102 and the second sliding groove 103 are arranged in sequence. For example, there are two fixing grooves 104, one of which 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, and the other 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 "top", "bottom", "left", "right", "front" and "back" and other orientation words used in the description of the foldable terminal 1000 in this application are mainly based on the orientation of the foldable terminal 1000 in the drawings. The orientation of the Z axis is "top", the orientation of the Z axis is "bottom", the orientation of the X axis is "right", the orientation of the X axis is "left", the orientation of the Y axis is "back", and the orientation of the Y axis is "front". It does not limit the orientation of the foldable terminal 1000 in the actual application scenario.

[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 support 24, a second support 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 mounted in the mounting groove 101. In 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 arranged at intervals from the first rotating shaft 21 and the second rotating shaft 22. For example, the length directions of the first rotating shaft 21, the second rotating shaft 22, and the third rotating shafts 23 are all parallel to the Y-axis direction.

[0109] The first support 24 and the second support 25 are both sleeved on the first rotating shaft 21, the second rotating shaft 22, and the two third rotating shafts 23. In the length direction of the base 10, the first support 24 and the second support 25 are arranged at intervals. The first support 24 includes a first hinged surface (not marked in the figure) and a second hinged surface (not marked in the figure) facing away from the second support 25, and the first hinged surface and the second hinged surface are arranged at intervals in the width direction (the X-axis direction shown in the figure) of the first support 24. The second support 25 includes a third hinged surface (not marked in the figure) and a fourth hinged surface (not marked in the figure) facing away from the first support 24, and the third hinged surface and the fourth hinged surface are arranged at intervals in the width direction (the X-axis direction shown in the figure) of the second support 25. 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. The first hinged surface, the second hinged surface, the third hinged surface, and the fourth hinged surface all include a plurality of wave crests (not marked in the figure) and a plurality of wave troughs (not marked in the figure), and the plurality of wave crests and the plurality of wave troughs are alternately connected. For example, the first hinged surface, the second hinged surface, the third hinged surface, and the fourth hinged surface all include three wave crests and three wave troughs.

[0110] The first elastic member 26 is sleeved on the first rotating shaft 21 and located between and abutting against the first support 24 and the second support 25. The second elastic member 27 is sleeved on the second rotating shaft 22 and located between and abutting against the first support 24 and the second support 25. The two third elastic members 28 are respectively sleeved on the two third rotating shafts 23 and located between and abutting against the first support 24 and the second support 25. In 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. For example, the first elastic member 26, the second elastic member 27, and the third elastic members 28 are all springs. In other embodiments, one or more of the first elastic member 26, the second elastic member 27, and the third elastic members 28 can also be elastic structures such as elastic cotton, and the present application does not make specific limitations in this regard.

[0111] In the foldable mechanism 130 shown in the embodiment, the damping assembly 20 provides damping force by using elastic deformation of the elastic member. In other embodiments, the damping assembly 20 can also provide damping force by using other structures, such as damping sheets, or the damping assembly 20 can provide damping force by using both the elastic member and the damping sheets, and the application does not limit the structure of the damping assembly 20.

[0112] The synchronization assembly 30 is located on the side of the first support 24 away from the second support 25 and is spaced apart from the first support 24. In the embodiment, the synchronization assembly 30 includes two synchronization gears 31, which are sleeved on the two third rotating shafts 23 and are in meshing engagement with each other. When one of the synchronization gears 31 rotates relative to the base 10, the other synchronization gear 31 is driven to rotate relative to the base 10. The two synchronization gears 31 are both spaced apart from the first rotating shaft 21 and the second rotating shaft 22.

[0113] In the foldable mechanism 130 shown in the embodiment, the synchronization assembly 30 uses the synchronization gears to achieve synchronous rotation. In other embodiments, the synchronization assembly 30 can also use other structures to achieve synchronous rotation, such as the cooperation of a synchronization sliding groove and a synchronization sliding block, or the synchronization assembly 30 can use both the synchronization gears and the cooperation of the synchronization sliding groove and the synchronization sliding block to achieve synchronous rotation, and the application does not limit the structure of the synchronization assembly 30.

[0114] Please refer to Figure 8 , Figure 8 is Figure 6 the structure diagram of the support plate 40 in the foldable mechanism 130 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 avoiding gap 401, a second avoiding gap 402, and a fixing hole 403, which all penetrate the support plate 40 along the thickness direction (the Z-axis direction shown in the figure) of the support plate 40. Along the width direction (the X-axis direction shown in the figure) of the support plate 40, the first avoiding gap 401 and the second avoiding gap 402 are spaced apart. The first avoiding gap 401 penetrates the left side surface of the support plate 40, and the second avoiding gap 402 penetrates the right side surface of the support plate 40.

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

[0117] The fixing hole 403 is two, which are arranged at intervals with the first avoiding gap 401 and the second avoiding gap 402 along the length direction of the support plate 40. The two fixing holes 403 are respectively communicated with the two fixing slots 104.

[0118] In addition, the foldable mechanism 130 further includes two fixing members (not shown in the figure), each of which is arranged in one fixing hole 403 of the support plate 40 and one fixing slot 104 of the base 10, and is fixedly connected with the support plate 40 and the base 10, so as to fix the support plate 40 on the base 10.

[0119] Please refer to Figure 9 and Figure 10 , Figure 9 is Figure 6 the structure schematic view of the door plate assembly 50 in the foldable mechanism 130 shown in FIG. 4, Figure 10 is Figure 9 the structure schematic view of the door plate assembly 50 shown in FIG. 5 from another angle.

[0120] The door plate assembly 50 is sleeved on the first rotating shaft 21 and the second rotating shaft 22, and is hingedly connected with the first support 24 and the second support 25, and is engaged with the two synchronous gears 31. In the embodiment, the door plate assembly 50 includes a first door plate 51, a second door plate 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, is hingedly connected with the first support 24 and the second support 25, is engaged with one synchronous gear 31, and is slidingly and rotatably connected with the first door plate 51. The second swing arm 54 is sleeved on the second rotating shaft 22, is hingedly connected with the first support 24 and the second support 25, is engaged with one synchronous gear 31, and is slidingly and rotatably connected with the second door plate 52.

[0121] The first door panel 51 includes a first plate body 511, a first protrusion 512, a first guide slider 513, a first guide post 514, and a second guide post 515. The first protrusion 512, the first guide slider 513, the first guide post 514, and the second guide post 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 post 514, and the second guide post 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 post 514 and the second guide post 515 are both fixedly connected to the first protrusion 512. In other words, the first guide post 514 and the second guide post 515 are fixedly connected to the first plate body 511 via 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 511 . This application does not impose any specific restrictions on the connection method between the first guide pillar 514 and the second guide pillar 515 and the first plate 511 .

[0122] For example, the first plate 511, the first protrusion 512, the first guide slider 513, the first guide post 514, and the second guide post 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 other embodiments, the first door panel 51 can also be an integral structural component formed by assembly. For example, the first protrusion 512 or the first guide slider 513 can be fixedly connected to the first plate 511 by welding or bonding, or the first guide post 514 and the second guide post 515 can be fixedly connected to the first protrusion 512 by welding or bonding.

[0123] The length of the first plate 511 is parallel to the Y-axis. The first protrusion 512 and the first guide slider 513 are both fixedly connected to the bottom surface (not labeled) of the first plate 511. Both the first protrusion 512 and the first guide slider 513 extend from the bottom surface of the first plate 511 in a direction away from the top surface (not labeled) (in the negative Z-axis direction in the figure). Along the length of the first plate 511, the first guide slider 513 is located to 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 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 to the direction away from the first guide slider 513 (the negative direction of the Y axis shown 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 a 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 a second distance, 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 oppositely arranged with 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 surfaces. Exemplarily, the axis of the first clamping surface 516 and the second clamping surface 517 is 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 plate 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 fixedly connected to the second plate body 521, and the third guide post 524 and the fourth guide post 525 are fixedly connected to the second protrusion 522. Among them, the structure of the second door plate 52 can refer to the related description of the first door plate 51, which will not be repeated here.

[0127] The first swing arm 53 includes a first rotating part 531, a first sliding part 532 and a first connecting part 533. The first rotating part 531 is sleeved on the first rotating shaft 21, and is hinged with the first support 24 and the second support 25, and is engaged with one synchronous gear 31. Among them, the first rotating part 531 can be exposed relative to the first avoiding gap 401. That is, the first avoiding gap 401 can avoid the first rotating part 531 to avoid the mutual interference between the first rotating part 531 and the support plate 40, and ensure the fluency of the rotation of the first swing arm 53 relative to the base 10. The first sliding part 532 is slidingly and rotatably connected with the first door plate 51. The first connecting part 533 is fixedly connected between the first rotating part 531 and the first sliding part 532. Among them, the first rotating part 531, the first sliding part 532 and the first connecting part 533 can be integrally formed.

[0128] The first rotating part 531 comprises 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 (the Y-axis direction shown in the figure) of the first rotating part 531. 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 realize the rotating connection between the first rotating part 531 and the base 10 and further realize the rotating connection between the first swing arm 53 and the base 10. The first sub-rotating part 534 comprises a fifth hinge surface 5341 facing the second sub-rotating part 535, and the fifth hinge surface 5341 is hinged with the first hinge surface to realize the hinge between the first rotating part 531 and the first support 24 and further realize the hinge between the first swing arm 53 and the first support 24. The second sub-rotating part 535 comprises a sixth hinge surface 5351 facing the first sub-rotating part 534, and the sixth hinge surface 5351 is hinged with the third hinge surface to realize the hinge between the first rotating part 531 and the second support 25 and further realize the hinge between the first swing arm 53 and the second support 25. The fifth hinge surface 5341 and the sixth hinge surface 5351 both comprise a plurality of wave crests (not marked in the figure) and a plurality of wave troughs (not marked in the figure), and the plurality of wave crests and the plurality of wave troughs are alternately connected. For example, the fifth hinge surface 5341 and the sixth hinge surface 5351 both comprise three wave crests and three wave troughs.

[0129] At this time, the first sub-rotating part 534 is exposed relative to the first sub-avoiding gap 404, and the second sub-rotating part 535 is exposed relative to the second sub-avoiding gap 405. That is, the first sub-avoiding gap 404 avoids the first sub-rotating part 534, and the second sub-avoiding gap 405 avoids the second sub-rotating part 535, so as to avoid the interference between the first sub-rotating part 534, the second sub-rotating part 535 and the support plate 40 and ensure the 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, the first support 24 and the second support 25 will move towards each other relative to the direction of the first rotating shaft 21 and the first elastic member 26 will be elastically deformed in the process from the abutment of the wave crest of the fifth hinge surface 5341 in the first swing arm 53 and the wave trough of the first hinge surface in the first support 24 and the abutment of the wave crest of the sixth hinge surface 5351 in the first swing arm 53 and the wave trough of the third hinge surface in the second support 25 to the abutment of the wave crest of the fifth hinge surface 5341 in the first swing arm 53 and the wave crest of the first hinge surface in the first support 24 and the abutment of the wave crest of the sixth hinge surface 5351 in the first swing arm 53 and the wave crest of the third hinge surface in the second support 25.

[0131] When the peak of the fifth hinge surface 5341 in the first swing arm 53 abuts against the peak of the first hinge surface in the first support 24, and the peak of the sixth hinge surface 5351 in the first swing arm 53 abuts against the peak of the third hinge surface in the second support 25, to the process that the peak of the fifth hinge surface 5341 in the first swing arm 53 abuts against the valley of the first hinge surface in the first support 24, and the peak of the sixth hinge surface 5351 in the first swing arm 53 abuts against the valley of the third hinge surface in the second support 25, the first support 24 and the second support 25 will move away from each other relative to the first rotating shaft 21, and the first elastic member 26 will elastically recover.

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

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

[0134] The first sliding part 532 includes a first sub-sliding part 536, a second sub-sliding part 537, and a first sliding plate 538. In the length direction (the Y-axis direction shown in the figure) of the first sliding part 532, the first sub-sliding part 536 and the second sub-sliding part 537 are arranged at intervals, and the first sliding plate 538 is fixedly connected to one side of the second sub-sliding part 537 facing the first sub-sliding part 536 and is arranged at intervals with the first sub-sliding part 536.

[0135] In this embodiment, the structure of the first sliding plate 538 is matched with the structure of the first guide column 514 and the second guide column 515. It should be noted that the structure of the first sliding plate 538 is matched with the movement path of the first guide column 514 and the second guide column 515, and after the first sliding plate 538 is assembled with the first guide column 514 and the second guide column 515, the relative movement process between the first swing arm 53 and the first door plate 51 is smooth without jamming in the use process of the foldable mechanism 130, so as to ensure the use reliability of the foldable mechanism 130.

[0136] The first sliding plate 538 is in a planar plate shape, and the included angle between the first sliding plate 538 and the positive direction of the X axis is an acute angle. The first sliding plate 538 has an unfolded position 5381 and a folded position 5382. The folded position 5382 is located outside the unfolded position 5381 and at the bottom side of the unfolded position 5381 and is arranged in a spaced manner with the unfolded position 5381. For example, the folded position 5382 is located at the outermost side of the first sliding plate 538, and the unfolded position 5381 is located at the innermost side of the first sliding plate 538.

[0137] It should be noted that when the foldable mechanism 130 is described in the embodiments of the present application, the "inner side" and "inner side" involved are described with the position of the foldable mechanism 130 in the unfolded state, and the "inner side" is close to the base 10, and the "outer side" is away from the base 10, which does not limit the position of the foldable mechanism 130 in the actual application scenario.

[0138] The second swing arm 54 includes a second rotating part 541, a second sliding part 542, and a second connecting part 543. The second rotating part 541 is sleeved on the second rotating shaft 22, and is hinged with the first support 24 and the second support 25, and is engaged with the other synchronous gear 31. The second rotating part 541 can be exposed relative to the second avoiding gap 402. That is, the second avoiding gap 402 can avoid the second rotating part 541 to avoid mutual interference between the second rotating part 541 and the support plate 40, and ensure the smoothness of the rotation of the second swing arm 54 relative to the base 10. The second sliding part 542 is slidingly and rotatably connected with the second door plate 52. The second connecting part 543 is fixedly connected between the second rotating part 541 and the second sliding part 542. The second sliding part 542, the second connecting part 543, and the second rotating part 541 can be integrally formed.

[0139] In the embodiments, the structure of the second swing arm 54 and the cooperation relationship between the second swing arm 54 and the second door plate 52 and the base 10 can refer to the related description of the structure of the first swing arm 53 and the cooperation relationship between the first swing arm 53 and the first door plate 51 and the base 10, and 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 support 24 and the second support 25 to make the first support 24 and the second support 25 approach or move 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. During the folding or unfolding of 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 feeling, thereby improving the user's experience. In other words, the first swing arm 53 and the second swing arm 54 can be used as the door panel swing arm of the door panel assembly 50, and also can be used as the damping swing arm of the damping assembly 20, so that the damping swing arm of the damping assembly 20 is saved, the structure of the foldable mechanism 130 is simplified, and the lightweight design of the foldable terminal 1000 is facilitated.

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

[0142] In the embodiment, the first swing arm 53 drives the synchronous gear 31 to rotate relative to the base 10, the synchronous gear 31 drives the other synchronous gear 31 to rotate relative to the base 10, and the other synchronous gear 31 drives the second swing arm 54 to rotate relative to the base 10, so as to realize 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 the door panel swing arm of the door panel assembly 50, and also can be used as the synchronous swing arm of the synchronous assembly 30, so that the synchronous swing arm of the synchronous assembly 30 is saved, and the structure of the foldable mechanism 130 is facilitated to be simplified.

[0143] Please refer to Figure 11 and Figure 12 , Figure 11 is Figure 4 the structure schematic view of the foldable mechanism 130 shown in FIG. 13 along II-II, Figure 12 is Figure 5 the structure schematic view of the foldable mechanism 130 shown in FIG. 13 along III-III.

[0144] The first slide 538 is clamped between the first guide post 514 and the second guide post 515 and can slide and rotate relative to the first guide post 514 and the second guide post 515 to achieve a sliding and rotational connection between the first sliding portion 532 and the first door panel 51, thereby achieving a sliding and rotational connection between the first swing arm 53 and the first door panel 51. The second slide 548 is clamped between the third guide post 524 and the fourth guide post 525 and can slide and rotate relative to the third guide post 524 and the fourth guide post 525 to achieve a sliding and rotational connection between the second sliding portion 542 and the second door panel 52, thereby achieving a sliding and rotational 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 538, and the third clamping surface 526 and the fourth clamping surface 527 jointly clamp the second slide 548.

[0145] like Figure 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, folded relative to each other, and spaced apart from each other. The first swing arm 53 and the second swing arm 54 are folded relative to each other. The folded portion 5382 of the first slide 538 is clamped between the first guide post 514 and the second guide post 515, and the folded portion 5482 of the second slide 548 is clamped between the third guide post 524 and the fourth guide post 525. That is, the first guide post 514 and the second guide post 515 clamp the end of the first slide 538 away from the base 10, while the third guide post 524 and the fourth guide post 525 clamp the end of the second slide 548 away from the base 10. The first clamping surface 516 and the second clamping surface 517 clamp the folded portion 5382 of the first slide 538, while the third clamping surface 526 and the fourth clamping surface 527 clamp the folded portion 5482 of the second slide 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 clearance space 1301. The clearance space 1301 can avoid the foldable portion 230 of the display screen 200. The cross-section of the clearance space 1301 can be in a "teardrop" shape to better avoid the rounded angle formed when the foldable portion 230 bends, ensuring that the foldable portion 230 does not bend at a large angle, avoiding undesirable phenomena such as creases on the display screen 200, extending the service life of the display screen 200, and ensuring the reliability of the foldable terminal 1000.

[0147] like Figure 12As shown, when the foldable mechanism 130 is in the unfolded state, the first door plate 51 and the second door plate 52 are respectively located on the opposite sides of the base 10 and the support plate 40, and are relatively flat, and the first swing arm 53 and the second swing arm 54 are relatively flat. Among them, the unfolded position 5381 of the first sliding plate 538 is clamped between the first guide column 514 and the second guide column 515, and the unfolded position 5481 of the second sliding 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 sliding 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 sliding 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 sliding plate 538, and the third clamping surface 526 and the fourth clamping surface 527 clamp the unfolded position 5481 of the second sliding plate 548.

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

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

[0150] In the unfolding process, such as the process of switching the foldable mechanism 130 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 as to switch the door panel assembly 50 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 clamping the first sliding plate 538 to the unfolding position 5381 clamping the first sliding plate 538, and the third guide column 524 and the fourth guide column 525 slide from the folding position 5482 clamping the second sliding plate 548 to the unfolding position 5481 clamping the second sliding plate 548.

[0151] Please see Figure 13 , Figure 13 is Figure 2 The first door panel 51 and the second door panel 52 of the foldable mechanism 130 in the foldable terminal 1000 shown in FIG. 1 are shown in the force analysis structure diagram. Among them, Figure 13 The arrowed straight line represents the force direction.

[0152] Figure 13 In the force analysis structure diagram, the positions indicated by P1 and P2 are the action position points of the connecting circuit board 160 on the first door panel 51 and the second door panel 52, the positions indicated by Q1 and Q2 are the action position points of the first swing arm on the first door panel and the second swing arm on the second door panel in the conventional foldable terminal, and the positions indicated by S1 and S2 are the action position points of the first swing arm 53 on the first door panel 51 and the second swing arm 54 on the second door panel 52 in the foldable terminal 1000 shown in the embodiment of the application.

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

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

[0155] Therefore, in the case that the connecting circuit board 160 acts on the first door plate 51 and the second door plate 52 with the same force, since L2 < L1, then M2 < M1. Therefore, compared with the conventional foldable terminal, in the foldable terminal 1000 shown in the embodiment of the present application, the torque borne by the first door plate 51 and the second door plate 52 is smaller, the deformation amount of the first door plate 51 and the second door plate 52 caused by the torque M2 is reduced, which helps to ensure the flatness of the first door plate 51 and the second door plate 52, and effectively improves the flatness and light and shadow display effect of the display screen 200.

[0156] Moreover, the structures of the first guide column 514 and the second guide column 515 on the first door plate 51, the third guide column 524 and the fourth guide column 525 on the second door plate 52, the first sliding plate 538 on the first swing arm 53 and the second sliding plate 548 on the second swing arm 54 are all simple, the cooperation structures between the first guide column 514 and the second guide column 515 and the first sliding plate 538, and between the third guide column 524 and the fourth guide column 525 and the second sliding plate 548 are also simple, and the first door plate 51 and the first swing arm 53, and the second door plate 52 and the second swing arm 54 do not need to be designed with complex structure cooperation. Not only this helps to reduce the cost of the foldable mechanism 130, but also the scheme of the foldable mechanism 130 is easy to implement and apply.

[0157] In addition, compared with the conventional foldable mechanism, 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 ensures the use reliability of the foldable mechanism 130.

[0158] Please refer to Figure 14 , Figure 14 is Figure 6 the structure diagram of the connecting assembly 60 in the foldable mechanism 130.

[0159] The connecting assembly 60 is installed on the first sliding groove 102 and the second sliding groove 103, and is in sliding and rotating connection with the first door panel 51 and the second door panel 52, and is in sliding connection with the first swing arm 53 and the second swing arm 54. In the 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 in sliding and rotating connection with the first door panel 51, and is in sliding connection with the first swing arm 53. The second fixed frame 62 is in sliding and rotating connection with the second door panel 52, and is in sliding connection with 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. For example, 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 on the first sliding groove 102 and is in rotating connection with the first fixed frame 61. The fourth swing arm 64 is installed on the second sliding groove 103 and is in rotating connection with the second fixed frame 62.

[0160] When the connecting assembly 60 switches between the folded state and the unfolded state, the first fixing frame 61, the third swing arm 63, the first door panel 51, and the first swing arm 53 rotate in a first direction relative to the base 10, and the second fixing frame 62, the fourth swing arm 64, the second door panel 52, and the second swing arm 54 rotate in a second direction relative to the base 10, which is opposite to the first direction. For example, when the connecting assembly 60 switches from the folded state to the unfolded state, the first fixing frame 61, the third swing arm 63, the first door panel 51, and the first swing arm 53 rotate in a counterclockwise direction relative to the base 10, and the second fixing frame 62, the fourth swing arm 64, the second door panel 52, and the second swing arm 54 rotate in a clockwise direction relative to the base 10. When the connecting assembly 60 switches from the unfolded state to the folded state, the first fixing 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 fixing 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 of the first fixing frame 61 (not labeled in the figure). The first assembly notch 611 is recessed in a direction (in the negative direction of the X-axis in the figure) from the right side to the left side (not labeled in the figure) of the first fixing frame 61 and passes through the left side, bottom surface, and top surface (not labeled in the figure) of the first fixing frame 61. In 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 to the left side of the first fixing frame 61 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, but can also be a round hole or a special-shaped hole. In 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 fixed frame 61, the first guide slot 613 is located at the other side of the first assembly gap 611 and is arranged spaced apart from the first assembly gap 611. The opening of the first guide slot 613 is located at the top surface of the first fixed frame 61. The first guide slot 613 is recessed from the top surface of the first fixed frame 61 to the direction of the bottom surface of the first fixed frame 61 (the negative direction of the Z-axis shown in the figure), and penetrates the left side surface and the front end surface of the first fixed frame 61. Among them, the structure of the first guide slot 613 is matched with the structure of the first guide slider 513 of the first door plate 51. For example, the first guide slot 613 is an arc-shaped slot. That is, the bottom wall surface of the first guide slot 613 is an arc-shaped surface. The axis of the first guide slot 613 is parallel to the Y-axis direction. In other embodiments, the first guide slot 613 can also not penetrate the left side surface of the first fixed frame 61, and / or the first guide slot 613 can also not penetrate the front end surface of the first fixed frame 61.

[0164] The second fixed frame 62 is provided with a second assembly gap 621, a second sliding hole 622 and a second guide slot 623. Among them, the structure of the second assembly gap 621, the second sliding hole 622 and the second guide slot 623 can be respectively referred to the related description of the first assembly gap 611, the first sliding hole 612 and the first guide slot 613 in the first fixed frame 61, which will not be repeated here. Among them, the openings of the second assembly gap 621 and the second sliding hole 622 are both located at the left side surface of the second fixed 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, the first pin shaft 65 is installed in the first assembly gap 611 of the first fixed frame 61, and the second pin shaft 66 is installed in the second assembly gap 621 of the second fixed frame 62. Among them, the first pin shaft 65 and the second pin shaft 66 can be circular 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 part 631, a third rotating part 632 and a third connecting part 633. The structure of the third sliding part 631 is matched with the structure of the first sliding slot 102 of the base 10. The third sliding part 631 is installed in the first sliding slot 102 and can slide and rotate relative to the base 10 in the first sliding slot 102 to realize the sliding and rotating connection between the third sliding part 631 and the base 10, and further realize the sliding and rotating connection between the third swing arm 63 and the base 10. The structure of the third rotating part 632 is matched with the structure of the first assembly gap 611. The third rotating part 632 is sleeved on the first pin shaft 65 and can rotate relative to the first fixed frame 61 to realize the rotating connection between the third swing arm 63 and the first fixed frame 61. The third connecting part 633 is fixedly connected between the third sliding part 631 and the third rotating part 632. Among them, the third sliding part 631, the third rotating part 632 and the third connecting part 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 mating relationship between the fourth swing arm 64, the second fixing bracket 62, and the base 10 can be found in the description of the structure of the third swing arm 63 and the mating relationship between the third swing arm 63, the first fixing bracket 61, and the base 10, and are not further described here.

[0168] Please also refer to Figure 9 and Figure 10 In the first door panel 51, the first plate body 511 can be located on the top side of the first fixing frame 61, and the first guide slider 513 can be installed in the first guide groove 613 of the first fixing frame 61. The first guide slider 513 can slide and rotate relative to the first fixing frame 61 within the first guide groove 613, thereby achieving a sliding and rotating connection between the first door panel 51 and the first fixing frame 61, thereby improving the assembly stability between the first door panel 51 and the connecting assembly 60. The first protrusion 512, the first guide post 514, and the second guide post 515 can 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 on 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. The second guide slider 523 can slide and rotate relative to the second fixing frame 62 within the second guide groove 623 to achieve a sliding and rotating connection between the second door panel 52 and the second fixing frame 62, thereby improving the assembly stability between the second door panel 52 and the connecting assembly 60. The second protrusion 522, the third guide post 524, and the fourth guide post 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. This application does not impose any specific restrictions on the manner in which the sliding and rotating connection is achieved 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 part 532 is arranged in the first sliding hole 612 of the first fixed frame 61 and can slide relative to the first fixed frame 61 in the first sliding hole 612, so as to realize the sliding connection between the first sliding part 532 and the first fixed frame 61, and further realize the sliding connection between the first swing arm 53 and the first fixed frame 61. In the second swing arm 54, the second sliding part 542 is arranged in the second sliding hole 622 of the second fixed frame 62 and can slide relative to the second fixed frame 62 in the second sliding hole 622, so as to realize the sliding connection between the second sliding part 542 and the second fixed frame 62, and further realize the sliding connection between the second swing arm 54 and the second fixed frame 62. In other words, the first swing arm 53 and the second swing arm 54 can be used as the door panel swing arm of the door panel assembly 50 and can be used as the secondary swing arm of the connecting assembly 60, so as to save the secondary swing arm of the connecting assembly 60, simplify the structure of the foldable mechanism 130, and help realize the lightweight design of the foldable terminal 1000.

[0172] In the foldable mechanism 130 shown in the embodiment, the first guide column 514 and the second guide column 515 are arranged on the first door panel 51, the first sliding plate 538 is designed on the first swing arm 53, the third guide column 524 and the fourth guide column 525 are arranged on the second door panel 52, and the second sliding plate 548 is designed on the second swing arm 54. The first guide column 514 and the second guide column 515 clamp the first sliding plate 538, and the third guide column 524 and the fourth guide column 525 clamp the second sliding plate 548. When the foldable terminal 1000 is in the unfolded state, the first guide column 514 and the second guide column 515 clamp the unfolded position 5381 of the first sliding plate 538, the third guide column 524 and the fourth guide column 525 clamp the unfolded position 5481 of the second sliding 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 improve the movement reliability of the first door panel 51 and the second door panel 52 and ensure the use 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 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 due to the torque, ensure the flatness of the first door panel 51 and the second door panel 52, and effectively improve the flatness and light and shadow display effect of the display screen 200.

[0174] Please refer to Figures 15 to 18 ,Figure 15 is Figure 1 is a structural schematic view of the folding mechanism 130 of the foldable device 100 in the foldable terminal 1000 shown in FIG. 1A, under a second embodiment, Figure 16 is Figure 2 is a structural schematic view of the folding mechanism 130 of the foldable device 100 in the foldable terminal 1000 shown in FIG. 1A, under a second embodiment, Figure 17 is Figure 16 is a structural schematic view of the door plate assembly 50 in the folding mechanism 130 shown in FIG. 1A, Figure 18 is Figure 17 is a structural schematic view of the door plate assembly 50 shown in FIG. 1A, under another angle.

[0175] The folding mechanism 130 shown in the present embodiment differs from the folding mechanism 130 shown in the first embodiment described above in that the first protrusion 512 of the first door plate 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 towards the direction of the first guide column 514 and the second guide column 515, and penetrates through the left side surface and the right side surface 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. For example, the folding position of the third sliding hole 519 is located at the innermost side of the third sliding hole 519, and the unfolding position of the third sliding hole 519 is located at the outermost side of the third sliding hole 519. In other embodiments, the third sliding hole 519 can also not penetrate through the left side surface of the first protrusion 512.

[0176] The second protrusion 522 of the second door plate 52 can also be provided with a fourth sliding hole 529, and the opening of the fourth sliding hole 529 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 can be referred to the related description of the third sliding hole 519 in the first door plate 51, which will not be described here.

[0177] The first sliding part 532 of the first swing arm 53 further includes a first sliding shaft 539, which is fixedly connected to one side of the first sub-sliding part 536 towards the second sub-sliding part 537, and is spaced apart from the second sub-sliding part 537 and the first sliding plate 538. Specifically, the first sliding shaft 539 is connected to one end of the second sub-sliding part 537 away from the first connecting part 533, and is spaced apart from the first connecting part 533. The structure of the first sliding shaft 539 is matched with the structure of the third sliding hole 519. For example, the first sliding shaft 539 is a round shaft, and the axis of the first sliding shaft 539 is parallel to the Y-axis direction.

[0178] The second sliding part 542 further comprises a second sliding shaft 549 fixedly connected to one side of the third sub-sliding part 546 facing the fourth sub-sliding part 547, and 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 related description of the first sliding shaft 539 in the first swing arm 53, which will not be repeated here.

[0179] The first sliding shaft 539 can be arranged in the third sliding hole 519 and can slide in the third sliding hole 519 between the folded position of the third sliding hole 519 and the unfolded position of the third sliding hole 519, so as to slide and rotate relative to the first door panel 51, to realize the sliding and rotating connection between the first sliding part 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 is arranged in the fourth sliding hole 529 and can slide in the fourth sliding hole 529 between the folded position of the fourth sliding hole 529 and the unfolded position of the fourth sliding hole 529, so as to slide and rotate relative to the second door panel 52, to realize the sliding and rotating connection between the second sliding part 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] Please refer to Figure 19 and Figure 20 , Figure 19 is Figure 15 the structure schematic view of the foldable mechanism 130 along IV-IV after being cut open, Figure 20 is Figure 16 the structure schematic view of the foldable mechanism 130 along V-V after being cut open.

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

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

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

[0184] In the foldable mechanism 130 shown in the embodiment, the first guide pillar 514, the second guide pillar 515, and the third sliding hole 519 are designed on the first door panel 51, the first sliding plate 538 on the first swing arm 53 cooperates with the first guide pillar 514 and the second guide pillar 515, and the first sliding shaft 539 on the first swing arm 53 cooperates with the third sliding hole 519 to realize the sliding and rotating connection between the first door panel 51 and the first swing arm 53, the third guide pillar 524, the fourth guide pillar 525, and the fourth sliding hole 529 are designed on the second door panel 52, the second sliding plate 548 on the second swing arm 54 cooperates with the third guide pillar 524 and the fourth guide pillar 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, which ensures 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, improves the assembly stability of the door panel assembly 50, and further improves the use reliability of the foldable mechanism 130.

[0185] The above description is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application; the embodiments of the present application and the features in the embodiments can be combined with each other without conflict. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A foldable mechanism, characterized by, The first door plate is located on one side of the base, and 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 on the bottom side of the first plate body and are fixedly connected with the first plate body. The first guide column and the second guide column are spaced apart and oppositely arranged. The first swing arm comprises a first rotating part and a first sliding part. The first rotating part is rotationally connected with the base. The first sliding part is fixedly connected with the first rotating part. The first sliding part comprises a first sliding plate. The first sliding plate has an unfolded position and a folded position. The folded position of the first sliding plate is located on the outside of the unfolded 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. The first fixed frame is located on the bottom side of the first door plate. The first fixed frame is slidingly and rotationally connected with the first door plate and is slidingly connected with the first sliding part. When the foldable mechanism is in the 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 the folded state, the folded position of the first sliding plate is clamped between the first guide column and the second guide column.

2. The foldable mechanism of claim 1, wherein, The unfolded position of the first sliding plate is also located on the top side of the folded position of the first sliding plate.

3. The foldable mechanism of claim 1 or 2, wherein, The first guide column has a first clamping surface facing the second guide column. The second guide column has a second clamping surface facing the first guide column. The first clamping surface and the second clamping surface are both arc-shaped surfaces.

4. The foldable mechanism of claim 1, wherein, The first sliding part further comprises 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 slidingly connected with the first fixed frame. The first sliding plate is fixedly connected to one side of the second sub-sliding part facing the first sub-sliding part and is spaced apart from the first sub-sliding part.

5. The foldable mechanism according to any one of claims 1 to 4, wherein, The foldable mechanism further comprises a second door plate and a second swing arm. The second door plate is located on one side of the base and is spaced apart from the first door plate. The second door plate comprises 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 on the bottom side of the second plate body and are fixedly connected with the second plate body. The third guide column and the fourth guide column are spaced apart and oppositely arranged. The second swing arm comprises a second rotating part and a second sliding plate. The second rotating part is rotationally connected with the base. The second sliding plate has an unfolded position and a folded position. The folded position of the second sliding plate is located on the outside of the unfolded position of the second sliding plate. The second sliding 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. When the foldable mechanism is in the unfolded state, the unfolded position of the second sliding plate is clamped between the third guide column and the fourth guide column. When the foldable mechanism is in the folded state, the folded position of the second sliding plate is clamped between the third guide column and the fourth guide column.

6. The foldable mechanism of claim 5, wherein, The foldable mechanism further comprises a support plate, which is mounted on the base; 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.

7. The foldable mechanism of claim 6, wherein, When the foldable mechanism is in the folded state, the first door plate, the second door plate and the support plate enclose an avoiding space, and the cross section of the avoiding space is in the shape of a water droplet.

8. The foldable mechanism of any one of claims 1 to 7, wherein, The first plate body is provided with a third sliding hole, which 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 comprises a first sliding shaft, which is fixedly connected to the first rotating part and is spaced apart from the first sliding plate, and 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 the unfolded state, the first sliding shaft is located in the unfolded position of the third sliding hole; When the foldable mechanism is in the folded state, the first sliding shaft is located in the folded position of the third sliding hole. 9.A foldable terminal, comprising: The foldable mechanism comprises a first shell, a second shell and a foldable mechanism as claimed in any one of claims 1 to 8, and the foldable mechanism is connected between the first shell and the second shell. 10.The foldable terminal of claim 9, wherein, The foldable terminal further comprises 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 arranged on the inner side of the foldable mechanism and is spaced apart from the first swing arm, and the connecting circuit board is electrically connected between the first circuit board and the second circuit board.

Images