Foldable device and display terminal

Abstract

The present application relates to the technical field of foldable display. Provided are a foldable device and a display terminal. The foldable device comprises a first housing, a second housing, a third housing, a first hinge mechanism, a second hinge mechanism, and a linkage mechanism connected to the first hinge mechanism and the second hinge mechanism, wherein the linkage mechanism comprises a first connecting rod, a second connecting rod and a rotating member; when the first housing rotates relative to the second housing, the first connecting rod moves in a first direction, and at the same time, the rotating member rotates to drive the second connecting rod to move in a second direction, causing the third housing to rotate relative to the second housing; the first direction is opposite to the second direction, and both the first direction and the second direction are parallel to the arrangement direction of the first hinge mechanism and the second hinge mechanism. The present application enables the two hinge mechanisms to achieve opening and closing linkage, thereby solving the technical problem of complex operations in a foldable display terminal.

Description

Folding device and display terminal

[0001] The present application claims priority to the Chinese patent application No. 202411049372.3, filed on July 31, 2024, and entitled "Folding device and display terminal", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of folding display technology, and in particular to a folding device and a display terminal. BACKGROUND

[0003] With the continuous development of display technology, folding display terminals have gradually become a development trend of future mobile electronic products. In the unfolded state, the folding display terminal can obtain a larger display area and improve the viewing effect. In the folded state, the folding display terminal can obtain a smaller volume and be convenient for users to carry.

[0004] When a multi-fold display terminal, such as a three-fold display terminal, is switched from a closed state to an unfolded state, or from an unfolded state to a closed state, each folding part needs to be independently folded, which increases the complexity of the operation and reduces the user experience. SUMMARY

[0005] The present application provides a folding device and a display terminal. The purpose is to make two independent hinge mechanisms into an opening and closing linkage structure, so that the folding display terminal does not need to be independently folded.

[0006] To achieve the above purpose, the present application adopts the following technical solutions:

[0007] In one aspect of the present application, a folding device is provided. The folding device can be applied in a multi-fold display terminal, such as a three-fold display terminal or a more foldable display terminal.

[0008] The folding device can include a first housing, a second housing, and a third housing, and a first hinge mechanism and a second hinge mechanism. The first hinge mechanism is located between the first housing and the second housing, and the first housing and the second housing are respectively connected with the first hinge mechanism. The second hinge mechanism is located between the second housing and the third housing, and the second housing and the third housing are respectively connected with the second hinge mechanism. In addition, the folding device further includes a linkage mechanism, which is located between the first hinge mechanism and the second hinge mechanism, such as being arranged on the second housing.

[0009] The linkage mechanism can include a first connecting rod and a second connecting rod, and a rotating member; the first connecting rod is rotationally connected with the first hinge mechanism, and the second connecting rod is rotationally connected with the second hinge mechanism; the rotation axis of the first connecting rod and the rotation axis of the second connecting rod are both parallel to the rotation axis of any hinge mechanism; in addition, the first connecting rod and the second connecting rod are both movable; the rotating member of this example is rotationally connected with the second shell and can rotate relative to the second shell; the rotation axis of the rotating member can be perpendicular to the surface of the second shell; the first connecting rod and the second connecting rod are both connected with the rotating member; when the first shell rotates relative to the second shell, the first connecting rod moves in a first direction, the rotating member rotates, and the second connecting rod moves in a second direction; when the third shell rotates relative to the second shell, the first direction and the second direction are both parallel to the arrangement direction of the first hinge mechanism and the second hinge mechanism, and the first direction is opposite to the second direction.

[0010] The working principle of the folding device can be understood as follows: for example, when the folding device needs to be switched from the closed state to the unfolded state, the first shell can be bent; the first hinge mechanism can drive the first connecting rod to move in the first direction towards the second hinge mechanism; the moving first connecting rod can drive the rotating member to rotate; that is, the linear motion of the first connecting rod is converted into the rotary motion of the rotating member by the cooperation of the first connecting rod and the rotating member; the rotating rotating member drives the second connecting rod to move in the second direction towards the first hinge mechanism; the rotary motion of the rotating member is converted into the linear motion of the second connecting rod by the cooperation of the rotating member and the second connecting rod; and the moving second connecting rod drives the second hinge mechanism to act, so that the third shell rotates to achieve unfolding.

[0011] Based on the above description of the working principle of the folding device, it can be known that when the folding device is switched from the closed state to the unfolded state, the user only needs to bend the first shell to open the third shell; or when the folding device is switched from the unfolded state to the closed state, the user needs to bend the first shell to close the third shell, or bend the third shell to close the first shell. In this way, the user operation is simplified, and the user experience is improved.

[0012] In an optional implementation, the connection position of the first connecting rod and the rotating member is closer to the rotation axis of the rotating member than the connection position of the second connecting rod and the rotating member.

[0013] In some use scenarios, in order to avoid interference between the rotating first shell and the third shell during opening and closing, the rotation speed of the first shell and the rotation speed of the third shell can be made different within a certain angle range.

[0014] For example, in this example, the connection position of the first connecting rod and the rotating member is closer to the rotation axis of the rotating member than the connection position of the second connecting rod and the rotating member, so that the moving speed of the first connecting rod is less than the moving speed of the second connecting rod, and the rotating speed of the first shell is less than the rotating speed of the third shell, thereby avoiding interference between the rotating first shell and the third shell when the first shell and the third shell are opened and closed.

[0015] In an optional embodiment, one of the rotating member and the first connecting rod is provided with a first rail post, and the other is provided with a first track groove, and the first rail post is slidingly arranged in the first track groove; one of the rotating member and the second connecting rod is provided with a second rail post, and the other is provided with a second track groove, and the second rail post is slidingly arranged in the second track groove; the first rail post is closer to the rotation axis of the rotating member than the second rail post.

[0016] In this implementation, the cooperation of the rail post and the track groove converts the linear motion of the connecting rod into the rotating motion of the rotating member.

[0017] In addition, since the first rail post is closer to the rotation axis of the rotating member than the second rail post, the moving speed of the first connecting rod is different from the moving speed of the second connecting rod, and the first shell and the third shell rotate at different speeds in a certain angle range during opening and closing.

[0018] In an optional embodiment, the second track groove includes a first sub-track groove and a second sub-track groove, and the first sub-track groove and the second sub-track groove have different tracks.

[0019] In some folding devices, when the rotating rotating member drives the second connecting rod to move, there may be a phenomenon of jamming and unsmooth movement, which cannot drive the second connecting rod to move; in order to avoid the phenomenon that the second connecting rod cannot move, a plurality of second track grooves can be arranged, and the tracks of the plurality of second track grooves are different.

[0020] In an optional embodiment, the first track groove can be a linearly extending strip groove, and the second track groove can be a curved groove with an arc.

[0021] In an optional embodiment, the rotating member is a disc-shaped structure, and the rotating member is rotatably installed on the second shell through a pin shaft; the connection position of the first connecting rod and the rotating member, and the connection position of the second connecting rod and the rotating member are arranged along the outer periphery of the pin shaft.

[0022] This example adopts a disc-shaped rotating member, and the connection positions of the connecting rods and the rotating member are arranged along the outer periphery of the pin shaft, so that the switching between the rotating motion and the linear motion can be realized more stably.

[0023] In an alternative implementation, the linkage mechanism further comprises: a first limiting plate and a second limiting plate, the first limiting plate is fixedly connected with the first hinge mechanism, and the second limiting plate is fixedly connected with the second hinge mechanism; the first limiting plate is provided with a first sliding groove extending along the first direction, and the first connecting rod is slidingly arranged in the first sliding groove; the second limiting plate is provided with a second sliding groove extending along the second direction, and the second connecting rod is slidingly arranged in the second sliding groove.

[0024] In the implementation structure, the sliding groove is arranged on the limiting plate, and the sliding groove is used to limit the connecting rod to slide along the first direction or the second direction.

[0025] In some alternative implementations, the sliding groove can be arranged on the second housing, and the connecting rod is slidingly arranged in the corresponding sliding groove.

[0026] In an alternative implementation, the first limiting plate and the second limiting plate enclose a containing space, and the rotating member is located in the containing space.

[0027] In this way, the structure of the entire folding device can be more compact, and the thickness size of the folding device can not be increased.

[0028] In an alternative implementation, the second housing is provided with an inlay groove; the first connecting rod, the second connecting rod, the first limiting plate, the second limiting plate and the rotating member are arranged in the inlay groove.

[0029] By arranging the first connecting rod, the second connecting rod, the first limiting plate, the second limiting plate and the rotating member in the inlay groove of the second housing, the thickness size of the folding device can be compressed.

[0030] In an alternative implementation, the first connecting rod is located on the side of the first limiting plate close to the second housing, and the second connecting rod is located on the side of the second limiting plate close to the second housing; the first connecting rod and the second connecting rod have a gap, and the rotating member is rotationally connected with the second housing through a connecting member arranged in the gap.

[0031] It can be understood that: the connecting rod is arranged between the limiting plate and the second housing, since the connecting rod is a moving part and the limiting plate is a stationary part, the limiting plate is arranged close to the display screen in the display terminal, and the display screen can be protected.

[0032] In an alternative implementation, the first hinge mechanism comprises a first main shaft and a plurality of first rotating parts rotationally connected with the first main shaft, each first rotating part is fixedly connected with the second housing, and the first limiting plate is fixedly connected with one first rotating part.

[0033] The first limiting plate is fixedly connected with the first hinge mechanism, and in some implementations, the first limiting plate can be fixedly connected with the rotating part of the first hinge mechanism.

[0034] In some implementations, the first limiting plate and the first rotating part are an integral structure.

[0035] In an alternative implementation, the first connecting rod is rotationally connected with another rotating part of the first rotating part.

[0036] The first connecting rod is rotationally connected with the first hinge mechanism, and in some implementations, the first connecting rod can be rotationally connected with another rotating part of the first hinge mechanism.

[0037] In an alternative implementation, when the folding device is in the closed state, the first housing and the third housing are located on the same side of the second housing, and the third housing is located between the first housing and the second housing; the connecting position of the first connecting rod with the rotating part is closer to the rotation axis of the rotating part than the connecting position of the second connecting rod with the rotating part.

[0038] For example, when the folding device in the closed state needs to be switched to the flat state, because the connecting position of the first connecting rod with the rotating part is closer to the rotation axis of the rotating part than the connecting position of the second connecting rod with the rotating part, the first housing can be flipped, and the rotating speed of the third housing is greater than that of the first housing, so that interference between the two housings within a certain angle range during rotation can be avoided.

[0039] Alternatively, when the folding device in the flat state needs to be switched to the closed state, the rotating speed of the third housing is greater than that of the first housing, and the third housing is closed first, and the first housing is closed later.

[0040] In another aspect of the present application, a display terminal is provided, which can include a display screen and the folding device of any one of the above. The display screen is connected with the first housing, the second housing and the third housing in the folding device. The display terminal has the same technical effects as the folding device provided in the foregoing embodiments, and details are not repeated here.

[0041] In an alternative implementation, the display terminal includes at least two linkage mechanisms; the arrangement direction of the at least two linkage mechanisms is parallel to the extension direction of the first hinge mechanism.

[0042] Providing multiple linkage mechanisms can improve the working stability of the entire folding device.

[0043] In another aspect of the present application, a rotating shaft mechanism is provided, which can be applied in a display terminal with at least three folds. The display terminal can include a first housing, a second housing and a third housing.

[0044] The hinge mechanism comprises a first hinge mechanism, a second hinge mechanism and a linkage mechanism, the first hinge mechanism is used for being rotatably connected with the first shell and the second shell respectively, the second hinge mechanism is used for being rotatably connected with the second shell and the third shell respectively, the linkage mechanism is located between the first hinge mechanism and the second hinge mechanism, the linkage mechanism can comprise a first connecting rod and a second connecting rod, and a rotating piece, the first connecting rod is rotatably connected with the first hinge mechanism, the second connecting rod is rotatably connected with the second hinge mechanism, and the first connecting rod and the second connecting rod are both movable, the rotating piece is rotatable, and the first connecting rod and the second connecting rod are both connected with the rotating piece, the first connecting rod moves in a first direction, the rotating piece rotates, the second connecting rod moves in a second direction, and the first direction and the second direction are both parallel to the arrangement direction of the first hinge mechanism and the second hinge mechanism, and the first direction is opposite to the second direction.

[0045] In the hinge mechanism provided in the application, the first hinge mechanism and the second hinge mechanism are combined by the linkage mechanism, so that the hinge mechanism becomes an opening and closing linkage mechanism, for example, the hinge mechanism is applied to a three-fold display terminal, when the display terminal is in a closed state, the user only needs to turn over the shell located on the outside, so that the display terminal can be switched to a flat state, which is convenient for operation and improves the experience.

[0046] In an optional implementation, the connection position of the first connecting rod and the rotating piece is closer to the rotation axis of the rotating piece than the connection position of the second connecting rod and the rotating piece.

[0047] In this way, the rotation speeds of the first shell and the third shell can be different, so that interference between the first shell and the third shell in a certain angle range during rotation can be avoided.

[0048] In an optional implementation, one of the rotating piece and the first connecting rod is provided with a first rail column, and the other is provided with a first track groove, the first rail column is slidingly arranged in the first track groove, one of the rotating piece and the second connecting rod is provided with a second rail column, and the other is provided with a second track groove, the second rail column is slidingly arranged in the second track groove, and the first rail column is closer to the rotation axis of the rotating piece than the second rail column.

[0049] In this implementation, the linear motion of the connecting rod is converted into the rotary motion of the rotating piece by the cooperation of the rail column and the track groove.

[0050] In an optional implementation, the second track groove comprises a first sub-track groove and a second sub-track groove, and the tracks of the first sub-track groove and the second sub-track groove are different.

[0051] When the rotating rotating member drives the second connecting rod to move, there may be a phenomenon of jamming and unsmooth movement, which cannot drive the second connecting rod to move. In order to avoid the phenomenon of jamming, the second connecting rod cannot move. A plurality of second track grooves can be provided, and the tracks of the plurality of second track grooves are different.

[0052] In an optional embodiment, the first track groove can be a linearly extending strip groove, and the second track groove can be a curved groove with an arc.

[0053] In an optional embodiment, the rotating member is a disc-shaped structure; the connection positions of the first connecting rod and the rotating member, and the connection positions of the second connecting rod and the rotating member are arranged along the outer periphery of the pin shaft.

[0054] The example adopts a disc-shaped rotating member, and the connection positions of the connecting rod and the rotating member are arranged along the outer periphery of the pin shaft, so that the switching between rotary motion and linear motion can be realized more stably.

[0055] In an optional embodiment, the linkage mechanism further comprises: a first limiting plate and a second limiting plate, the first limiting plate is fixedly connected with the first hinge mechanism, and the second limiting plate is fixedly connected with the second hinge mechanism; a first sliding groove extending in the first direction is formed on the first limiting plate, and the first connecting rod is slidingly arranged in the first sliding groove; a second sliding groove extending in the second direction is formed on the second limiting plate, and the second connecting rod is slidingly arranged in the second sliding groove.

[0056] In the implementation structure, the sliding groove is arranged on the limiting plate, and the sliding groove is used to limit the sliding direction of the connecting rod along the first direction or the second direction.

[0057] In an optional embodiment, the first limiting plate and the second limiting plate enclose an accommodation space, and the rotating member is located in the accommodation space.

[0058] In this way, the structure of the entire rotating shaft mechanism can be more compact, and the thickness size of the rotating shaft mechanism can be increased.

[0059] In an optional embodiment, the second housing is provided with an inlay groove; the first connecting rod, the second connecting rod, the first limiting plate, the second limiting plate and the rotating member are arranged in the inlay groove.

[0060] By arranging the first connecting rod, the second connecting rod, the first limiting plate, the second limiting plate and the rotating member in the inlay groove of the second housing, the thickness size of the rotating shaft mechanism can be compressed. BRIEF DESCRIPTION OF DRAWINGS

[0061] FIG. 1 is a structural schematic diagram of a display terminal according to an embodiment of the present application;

[0062] FIG. 2 is an exploded structural schematic diagram of the display terminal shown in FIG. 1;

[0063] Fig. 3 is a schematic view of an intermediate state of the display terminal according to an embodiment of the present application;

[0064] Fig. 4 is a schematic view of a closed state of the display terminal according to an embodiment of the present application;

[0065] Fig. 5 is a schematic view of an intermediate state of the display terminal according to an embodiment of the present application;

[0066] Fig. 6 is a schematic view of the folding device according to an embodiment of the present application;

[0067] Fig. 7 is a schematic view of the folding device according to an embodiment of the present application;

[0068] Fig. 8 is a schematic view of the connection relationship between the first hinge mechanism, the second hinge mechanism and the linkage mechanism of the folding device according to an embodiment of the present application;

[0069] Fig. 9 is a schematic view of the connection relationship between the first hinge mechanism, the second hinge mechanism and the linkage mechanism of the folding device according to an embodiment of the present application;

[0070] Fig. 10 is a schematic view of the linkage mechanism of the folding device according to an embodiment of the present application;

[0071] Fig. 11 is a schematic view of the linkage mechanism of the folding device according to an embodiment of the present application;

[0072] Fig. 12 is a schematic view of the first limiting plate and the second limiting plate of the linkage mechanism of the folding device according to an embodiment of the present application;

[0073] Fig. 13 is a schematic view of the assembly of the first limiting plate and the second limiting plate of the linkage mechanism of the folding device according to an embodiment of the present application;

[0074] Fig. 14 is a schematic view of the linkage mechanism of the folding device according to an embodiment of the present application;

[0075] Fig. 15 is a schematic view of the linkage mechanism of the folding device according to an embodiment of the present application;

[0076] Fig. 16 is a schematic view of the linkage mechanism of the folding device according to an embodiment of the present application;

[0077] Fig. 17 is a schematic view of the linkage mechanism of the folding device according to an embodiment of the present application;

[0078] Fig. 18 is a schematic view of a closed state of the display terminal according to an embodiment of the present application;

[0079] Fig. 19 is a schematic view of the rotating member of the linkage mechanism of the folding device according to an embodiment of the present application;

[0080] Fig. 20 is an exploded schematic view of a linkage mechanism of a folding device according to an embodiment of the present application;

[0081] Fig. 21 is a schematic view of the connection relationship between a first hinge mechanism, a second hinge mechanism and a linkage mechanism of a folding device according to an embodiment of the present application;

[0082] Fig. 22 is an exploded schematic view of a linkage mechanism of a folding device according to an embodiment of the present application;

[0083] Fig. 23 is an exploded schematic view of a linkage mechanism of a folding device according to an embodiment of the present application;

[0084] Fig. 24 is a schematic view of the structure of a second housing of a folding device according to an embodiment of the present application;

[0085] Figs. 25-27 are schematic views of a closed state of a display terminal according to an embodiment of the present application;

[0086] Figs. 28-30 are schematic views of an intermediate state of a display terminal according to an embodiment of the present application;

[0087] Figs. 31-33 are schematic views of an unfolded state of a display terminal according to an embodiment of the present application.

[0088] Reference signs: 01 - display terminal; 10 - display screen; 20 - folding device; 11 - first housing; 12 - second housing; 13 - third housing; 101 - first hinge mechanism; 102 - second hinge mechanism; 103 - linkage mechanism; 121 - mounting groove; 122 - mounting hole; 101A - first main shaft; 101B - first rotating part; 101C - second rotating part; 101D - first rotating shaft; 102A - second main shaft; 102B - third rotating part; 102C - fourth rotating part; 102D - second rotating shaft; 1A - first connecting rod; 2A - second connecting rod; 1B - first limiting plate; 2B - second limiting plate; 1C - first sliding groove; 2C - second sliding groove; 3 - rotating member; 4A - first rail column; 4B - first track groove; 5A - second rail column; 5A1 - first sub-rail column; 5A2 - second sub-rail column; 5B - second track groove; 5B1 - first sub-track groove; 5B2 - second sub-track groove; 6A - first engagement structure; 6B - second engagement structure; 7 - accommodating space; 8 - pin shaft. DETAILED DESCRIPTION

[0089] Embodiments of the present application provide a display terminal which can be applied to various communication systems or communication protocols, such as Bluetooth (BT) communication technology, global positioning system (GPS) communication technology, global system of mobile communication (GSM) communication technology, wireless fidelity (WiFi) communication technology, wideband code division multiple access wireless (WCDMA) communication technology, long term evolution (LTE), 5G communication technology, and other future communication technologies.

[0090] The display terminal in embodiments of the present application can be a mobile phone, a pad, a notebook computer, a smart home, a smart wearable device (for example, a smart watch, a smart bracelet, smart glasses, a smart helmet), a virtual reality (VR) display terminal, an augmented reality (AR) display terminal, and the like. The display terminal can also be a handheld device with wireless communication function, a computing device, or other processing device connected to a wireless modem, a vehicle-mounted device, a display terminal in a 5G network, or a display terminal in a future evolved public land mobile network (PLMN), and the like, which are not limited in embodiments of the present application.

[0091] For example, the following is for convenience of description, and is exemplarily illustrated by taking a folding mobile phone as an example. As shown in FIG. 1, the display terminal 01 can include a display screen 10. In some embodiments of the present application, the display screen 10 can be a self-luminous display screen, such as an organic light emitting diode (OLED) display screen, a micro or mini light-emitting diode (LED) display screen, or a quantum dot light emitting diode (QLED) display screen, and the like. Alternatively, in some other embodiments of the present application, the display screen 10 can also be a liquid crystal display (LCD) which needs a backlight source.

[0092] In the process of folding or unfolding the display terminal 01, in order to support the display screen 10, the display terminal 01 can further include a folding device 20 as shown in FIG. 1. The folding device 20 can be arranged on the back of the display screen 10. In some embodiments of the present application, when the display terminal 01 is a three-fold display terminal, the folding device 20 can include a first housing 11, a second housing 12, and a third housing 13. The second housing 12 can be located between the first housing 11 and the third housing 13. The display screen 10 is connected to the first housing 11, the second housing 12, and the third housing 13.

[0093] For example, any one of the first housing 11, the second housing 12, and the third housing 13 can include a middle frame and a back cover located on the side of the middle frame away from the display screen 10. The middle frame and the back cover can enclose a space for accommodating circuit boards, batteries, cameras, sensors, and other components.

[0094] When the display terminal 01 is in the unfolded state as shown in FIG. 1, the included angle a between the first housing 11 and the second housing 12, or the included angle β between the second housing 12 and the third housing 13 can be or approximately 180°. Alternatively, within a certain angle tolerance, the included angle a or β can also be 165°, 177°, or 185°, etc. The surfaces of the first housing 11, the second housing 12, and the third housing 13 facing the display screen 10 can be or approximately in the same plane. When the display terminal 01 is in the unfolded state as shown in FIG. 1, the first housing 11, the second housing 12, and the third housing 13 are also in the unfolded state.

[0095] In order to enable the display terminal 01 to be folded, the folding device 20 can further include a first hinge mechanism 101 and a second hinge mechanism 102 as shown in FIG. 2.

[0096] The first hinge mechanism 101 can be located between the first housing 11 and the second housing 12, and the first housing 11 and the second housing 12 are respectively rotatably connected to the first hinge mechanism 101.

[0097] The second hinge mechanism 102 can be located between the second housing 12 and the third housing 13, and the third housing 13 and the second housing 12 can be respectively rotatably connected to the second hinge mechanism 102.

[0098] The embodiments of the present application do not limit the structure of the first hinge mechanism 101 and the second hinge mechanism 102, as long as the first housing 11 and the second housing 12 are respectively rotatably connected to the first hinge mechanism 101, and the second housing 12 and the third housing 13 are respectively rotatably connected to the second hinge mechanism 102.

[0099] When the user applies an external force to the third housing 13 or the first housing 11 while the display terminal 01 is in the unfolded state as shown in FIG. 1, the first housing 11 and the third housing 13 can be folded as shown in FIG. 3, such that the third housing 13 is flipped over the second housing 12 by the second hinge mechanism 102 (as shown in FIG. 2), and the first housing 11 is flipped over the third housing 13 by the first hinge mechanism 101 (as shown in FIG. 2), so that the entire display terminal 01 is in the folded state as shown in FIG. 4.

[0100] For example, in some embodiments of the present application, the folded state of the display terminal 01 can mean that the included angle β between the third housing 13 and the second housing 12, or the included angle α between the second housing 12 and the first housing 11 can be less than 180°. For example, as shown in FIG. 3, the included angle α can be 0° < α < 180°, or the included angle β can be 0° < β < 180°. Alternatively, as shown in FIG. 4, the included angle between the first housing 11 and the second housing 12, or the included angle between the first housing 11 and the third housing 13 can be 0°, in which case the folded state of the display terminal 01 can also be referred to as the closed state. Alternatively, in the case where a certain angle tolerance is allowed, the above-mentioned closed state can also be that the above-mentioned included angle α or included angle β can be 2° or 5°, etc.

[0101] In this case, when the display terminal 01 is in the closed state as shown in FIG. 4, the first housing 11, the second housing 12, and the third housing 13 are also in the closed state.

[0102] In order to describe the positional relationship of the various components in the display terminal 01, an XYZ coordinate system is established in the drawings. For example, the XY plane can be parallel to the display surface (the surface for displaying images) of the display screen 10 when the display terminal 01 is in the unfolded state as shown in FIG. 1. The Y direction can be parallel to the extension direction of the first hinge mechanism 101 or the second hinge mechanism 102. The Z direction can be the stacking direction of the first housing 11, the second housing 12, and the third housing 13 when the display terminal 01 is in the closed state as shown in FIG. 4. That is, the Z direction can be the thickness direction of the display terminal 01 or the above-mentioned housings. The Y direction and the Z direction are perpendicular to each other. The X direction can be perpendicular to the extension direction of the first hinge mechanism 101 or the extension direction of the second hinge mechanism 102 (i.e., the Y direction), and the X direction can also be perpendicular to the thickness direction of the above-mentioned display terminal 01 or the above-mentioned housings (i.e., the Z direction). Therefore, the X direction, the Y direction, and the Z direction are perpendicular to each other in pairs.

[0103] In addition, the above is an example of the folding device 20 having three sequentially adjacent housings, such as the first housing 11, the second housing 12, and the third housing 13. The number of housings in the folding device 20 is not limited in the present application, as long as there are at least three sequentially adjacent housings (for example, the first housing 11, the second housing 12, and the third housing 13). For the sake of convenience, the following examples are based on the folding device 20 having the above-mentioned first housing 11, second housing 12, and third housing 13.

[0104] The position of the display screen 10 in the folded state of the display terminal 01 is not limited in the present application. For example, the display terminal 01 can be an inside folding display terminal, in which the display screen 10 is wrapped by the first housing 11, the second housing 12, and the third housing 13 when the display terminal 01 is in the folded state. Alternatively, for another example, the display terminal 01 can be an outside folding display terminal or a partially outside folding display terminal, in which at least one of the first housing 11, the second housing 12, and the third housing 13 is wrapped by the display screen 10, and at least part of the display surface of the display screen 10 can serve as the outside of the display terminal 01.

[0105] FIG. 4 is an example of the folding mode in which the third housing 13 is folded between the first housing 11 and the second housing 12 when the display terminal 01 is in the closed state. At this time, the third housing 13, the second housing 12, and the first housing 11 can be folded in the shape of a "G".

[0106] In another embodiment of the present application, the second housing 12 can be folded between the first housing 11 and the third housing 13 when the display terminal 01 is in the closed state. At this time, the third housing 13, the second housing 12, and the first housing 11 can be folded in the shape of an "S".

[0107] The folding form of the third housing 13, the second housing 12, and the first housing 11 in the closed state is not limited in the present application. For the sake of convenience, the following examples are based on the folding in the shape of a "G".

[0108] In the case where the display terminal 01 is in the closed state shown in FIG. 4, when it is necessary to flatten the display terminal 01, the first housing 11 and the third housing 13 can be flipped in the direction of the curved arrow as shown in FIG. 5. It can be understood that the user needs to flip not only the first housing 11 but also the third housing 13 in order to make the display terminal 01 in the flattened state. In the case where the display terminal 01 is in the flattened state shown in FIG. 1, the user needs to flip not only the first housing 11 but also the third housing 13 in order to make the display terminal 01 in the closed state. The repeated flipping increases the complexity of the operation and reduces the user experience.

[0109] In order to avoid multiple flipping, and improve the convenience of the lifting operation, the embodiments of the present application provide some structures that can be implemented, as described below.

[0110] As shown in FIGS. 6 and 7, FIGS. 6 and 7 show a structure schematic diagram of the folding device 20 in the unfolded state. In this example, it includes the first shell 11, the second shell 12 and the third shell 13, and the first hinge mechanism 101 connecting the first shell 11 and the second shell 12, and the second hinge mechanism 102 connecting the second shell 12 and the third shell 13.

[0111] In the example of FIGS. 6 and 7, the folding device 20 further includes a linkage mechanism 103, which is located between the first hinge mechanism 101 and the second hinge mechanism 102, and connects the first hinge mechanism 101 and the second hinge mechanism 102.

[0112] By setting the linkage mechanism 103, the two independent hinge mechanisms can become an opening and closing linkage structure, that is, when one hinge mechanism works, it will drive the other hinge mechanism to work through the linkage mechanism 103. For example, when the display terminal needs to be switched from the closed state to the unfolded state, as shown in FIG. 5, the user only needs to flip the first shell 11, without flipping the third shell 13, to achieve unfolding.

[0113] In some examples, one linkage mechanism 103 can be arranged near the middle position of the first hinge mechanism 101 and the second hinge mechanism 102.

[0114] In some other examples, multiple linkage mechanisms 103 can be included. For example, in FIGS. 6 and 7, two linkage mechanisms 103 are included, and the arrangement direction of the two linkage mechanisms 103 is parallel to the extension direction of any hinge mechanism, for example, the two linkage mechanisms 103 are arranged along the Y direction, which can improve the working stability during the opening and closing of the folding device.

[0115] The linkage mechanism 103 of the example of the present application has multiple implementation modes, as described below:

[0116] FIGS. 8 and 9 exemplarily show an implementation structure of the linkage mechanism 103, which are different perspective views. In this example, the linkage mechanism 103 can include a first connecting rod 1A and a second connecting rod 2A, and a rotating piece 3.

[0117] The first connecting rod 1A is rotationally connected with the first hinge mechanism 101, and the second connecting rod 2A is rotationally connected with the second hinge mechanism 102.

[0118] In some examples, as shown in FIG. 8, the first hinge mechanism 101 can include a first main shaft 101 A, and a first rotating part 101 B and a second rotating part 101 C rotatably connected with the first main shaft 101 A. The first rotating part 101 B can be fixedly connected with the second housing 12 in FIG. 7, and the second rotating part 101 C can be fixedly connected with the first housing 11 in FIG. 7. The first rotating part 101 B and the second rotating part 101 C are rotatable relative to the first main shaft 101 A, and can realize the opening and closing of the second housing 12 and the first housing 11.

[0119] In some structures, the first rotating part 101 B can have a plurality of first rotating parts 101 B, and each of the plurality of first rotating parts 101 B can be rotatably connected with the first main shaft 101 A. The second rotating part 101 C can have a plurality of second rotating parts 101 C, and each of the plurality of second rotating parts 101 C can be rotatably connected with the first main shaft 101 A.

[0120] In the examples of the present application, the first connecting rod 1 A is rotatably connected with the first hinge mechanism 101. For example, as shown in FIG. 10, FIG. 10 shows a rotatable connection mode that can be realized between the first connecting rod 1 A and the first hinge mechanism 101. As shown in FIG. 10, the first connecting rod 1 A can be rotatably connected with one of the plurality of first rotating parts 101 B, for example, a first rotating shaft 101 D can be rotatably connected with the first rotating part 101 B, and the axial direction of the first rotating shaft 101 D is shown as L1 in FIG. 10, which can be parallel to the axial direction (M1 in FIGS. 8 and 9) of the first main shaft 101 A.

[0121] In some examples, as shown in FIG. 9, the second hinge mechanism 102 can include a second main shaft 102A, and a third rotating part 102B and a fourth rotating part 102C rotatably connected with the second main shaft 102A. The third rotating part 102B can be fixedly connected with the second housing 12 in FIG. 7, and the fourth rotating part 102C can be fixedly connected with the third housing 13 in FIG. 7. The third rotating part 102B and the fourth rotating part 102C are rotatable relative to the second main shaft 102A, and can realize the opening and closing of the second housing 12 and the third housing 13.

[0122] In some structures, the third rotating part 102B can have a plurality of third rotating parts 102B, and each of the plurality of third rotating parts 102B can be rotatably connected with the second main shaft 102A. The fourth rotating part 102C can have a plurality of fourth rotating parts 102C, and each of the plurality of fourth rotating parts 102C can be rotatably connected with the second main shaft 102A.

[0123] In the example of the present application, the second connecting rod 2A is rotatably connected with the second hinge mechanism 102. For example, as shown in FIG. 10, FIG. 10 shows a rotatable connection between the second connecting rod 2A and the second hinge mechanism 102. As shown in FIG. 10, the second connecting rod 2A can be rotatably connected with one of the third rotating parts 102B, for example, the second rotating shaft 102D can be rotatably connected with the third rotating part 102B, the axial direction of the second rotating shaft 102D is shown as L2 in FIG. 10, and L2 can be parallel to the axial direction (M2 in FIGS. 8 and 9) of the second main shaft 102A.

[0124] In the example of the present application, the first connecting rod 1A is rotatably connected with the first hinge mechanism 101, and the second connecting rod 2A is rotatably connected with the second hinge mechanism 102. As shown in FIG. 10, the first connecting rod 1A and the second connecting rod 2A can also move, and the moving direction of the first connecting rod 1A and the second connecting rod 2A is parallel to the arrangement direction (for example, the X direction) of the first hinge mechanism 101 and the second hinge mechanism 102, for example, the first connecting rod 1A and the second connecting rod 2A can move along the X direction shown in FIG. 10.

[0125] The moving direction of the first connecting rod 1A and the second connecting rod 2A is opposite. For example, as shown in FIG. 10, the first connecting rod 1A moves to the left along the first direction, and the second connecting rod 2A can move to the right along the second direction, the first direction and the second direction are opposite, and both the first direction and the second direction are parallel to the arrangement direction (for example, the X direction) of the first hinge mechanism 101 and the second hinge mechanism 102.

[0126] As shown in FIG. 10, the rotating part 3 of the example of the present application is rotatably connected with the second housing 12. The rotating axis (the rotating axis Q in FIG. 10) of the rotating part 3 can be parallel to the third direction (for example, the Z direction), that is, perpendicular to the extension direction (for example, the Y direction) of the first hinge mechanism 101 or the second hinge mechanism 102, and perpendicular to the arrangement direction (for example, the X direction) of the first hinge mechanism 101 and the second hinge mechanism 102.

[0127] In the example of the present application, the first connecting rod 1A is connected with the rotating part 3, and the second connecting rod 2A is connected with the rotating part 3. The first connecting rod 1A moves along the first direction, which can drive the rotating part 3 to rotate, and the rotating rotating part 3 drives the second connecting rod 2A to move along the second direction.

[0128] The working principle of the linkage mechanism 103 in the examples of the present application can be understood as follows: when the user flips the first shell 11, the first hinge mechanism 101 is actuated, driving the first connecting rod 1A to move in the first direction. Since the first connecting rod 1A is connected to the rotating piece 3, the moving first connecting rod 1A drives the rotating piece 3 to rotate relative to the second shell 12. Since the rotating piece 3 is connected to the second connecting rod 2A, the rotating rotating piece 3 drives the second connecting rod 2A to move in the second direction opposite to the moving direction of the first connecting rod 1A. The second connecting rod 2A drives the second hinge mechanism 102 to actuate, and the third shell 13 is automatically flipped under the action of the second hinge mechanism 102.

[0129] In this way, the user only needs to flip the first shell 11 to automatically flip the third shell 13, which is more convenient to operate and provides a better experience.

[0130] In order to enable the first connecting rod 1A to move in the first direction, in some examples, as shown in FIG. 11, a first limiting plate 1B can be provided on the second shell 12 of FIG. 7.

[0131] As shown in FIG. 12, which is a visual diagram from the second surface to the first surface of FIG. 11, a first sliding groove 1C extending in the first direction (such as the X direction) can be formed on the first limiting plate 1B, and the first connecting rod 1A is slidingly arranged in the first sliding groove 1C. In other examples, a first sliding groove 1C can be formed on the second shell 12, and the first connecting rod 1A is slidingly arranged in the first sliding groove 1C. That is, the first sliding groove 1C extending in the first direction is used to limit the moving direction of the first connecting rod 1A.

[0132] In the examples of the present application, the first limiting plate 1B can be fixedly connected with the first hinge mechanism 101. For example, as shown in FIG. 12, the first limiting plate 1B can be fixedly connected with the first rotating part 101B. In some realizable structures, the first limiting plate 1B can be fixedly connected with the first rotating part 101B by using a connecting piece. In other examples, as shown in FIG. 12, the first limiting plate 1B and the first rotating part 101B can be an integrally formed structure.

[0133] In the examples of the present application, the first hinge mechanism 101 includes a plurality of first rotating parts 101B. The first connecting rod 1A can be rotatably connected with one of the plurality of first rotating parts 101B, and the first limiting plate 1B can be fixedly connected with another one of the plurality of first rotating parts 101B.

[0134] In order to enable the second connecting rod 2A to move in the second direction, in some examples, as shown in FIG. 11, a second limiting plate 2B can be provided on the second shell 12 of FIG. 7.

[0135] As shown in FIG. 12, a second sliding groove 2C extending along the second direction (e.g., the X direction) can be formed on the second limiting plate 2B, and the second connecting rod 2A is slidingly arranged in the second sliding groove 2C. In some other examples, a second sliding groove 2C can be formed on the second housing 12, and the second connecting rod 2A is slidingly arranged in the second sliding groove 2C. That is, the movement direction of the second connecting rod 2A is defined by the second sliding groove 2C extending along the first direction.

[0136] In the examples of the present application, the second limiting plate 2B can be fixedly connected with the second hinge mechanism 102. For example, the second limiting plate 2B can be fixedly connected with the third rotating part 102B. In some realizable structures, the second limiting plate 2B can be fixedly connected with the third rotating part 102B by using a connecting piece. In some other examples, as shown in FIG. 12, the second limiting plate 2B and the third rotating part 102B can be an integrally formed structure.

[0137] In the examples of the present application, the second hinge mechanism 102 includes a plurality of third rotating parts 102B. The second connecting rod 2A can be rotatably connected with one of the third rotating parts 102B, and the second limiting plate 2B can be fixedly connected with another one of the third rotating parts 102B.

[0138] In some structures, in order to make the structure compact, the first limiting plate 1B and the second limiting plate 2B can be arranged oppositely.

[0139] In order to ensure the sliding stroke of the first connecting rod 1A, as shown in FIG. 13, which is a structure schematic diagram of the first limiting plate 1B and the second limiting plate 2B after being assembled. In this example, the first sliding groove 1C arranged on the first limiting plate 1B can extend to the second limiting plate 2B. Alternatively, in order to ensure the sliding stroke of the second connecting rod 2A, the second sliding groove 2C arranged on the second limiting plate 2B can extend to the first limiting plate 1B.

[0140] The rotating member 3 has various realizable structures.

[0141] For example, it can be a worm gear structure. By using the worm gear structure, the linear motion of the first connecting rod 1A is converted into the rotation of the worm gear structure, and then converted into the linear motion of the second connecting rod 2A.

[0142] For another example, some realizable structures are given below in combination with the drawings.

[0143] As shown in FIG. 14, which is a structure schematic diagram of a rotating member 3 in the examples of the present application. In this example, the rotating member 3 is connected with the first connecting rod 1A by using the first meshing structure 6A, and the rotating member 3 is connected with the second connecting rod 2A by using the second meshing structure 6B. It can be understood that the rotating member 3 is meshingly and transmissionally connected with the first connecting rod 1A, and the rotating member 3 is meshingly and transmissionally connected with the second connecting rod 2A.

[0144] For example, when the first connecting rod 1A moves, the rotating member 3 is driven to rotate by the first engaging structure 6A, and the rotating member 3 driven to rotate drives the second connecting rod 2A to move by the second engaging structure 6B.

[0145] In one example, as shown in FIG. 14, when the first connecting rod 1A moves in the first direction to the right, the rotating member 3 is driven to rotate clockwise by the first engaging structure 6A, and the rotating member 3 driven to rotate drives the second connecting rod 2A to move in the second direction to the left by the second engaging structure 6B.

[0146] As shown in FIG. 15 is another structure of the rotating member 3 in the examples of the present application. In this example, the rotating member 3 can have a disc structure, the rotating member 3 is connected to the first connecting rod 1A in a sliding manner, and the rotating member 3 is connected to the second connecting rod 2A in a sliding manner.

[0147] For example, the rotating member 3 can be connected to the first connecting rod 1A by a sliding structure, and the rotating member 3 can be connected to the second connecting rod 2A by another sliding structure. In an example, the sliding structure can include a rail column and a track groove for the rail column to slide, one of the rail column and the track groove is arranged on the connecting rod, and the other is arranged on the rotating member, for example, the rail column is arranged on the rotating member, and the track groove is arranged on the connecting rod.

[0148] In the examples of FIG. 15 and FIG. 16, FIG. 15 and FIG. 16 respectively show the structure of the two connecting rods and the rotating member from different perspectives. Among them, the first rail column 4A can be arranged on the first connecting rod 1A, and the first track groove 4B for the first rail column 4A to slide can be arranged on the rotating member 3. By the cooperation of the first rail column 4A and the first track groove 4B, the conversion between the linear motion of the first connecting rod 1A and the rotating motion of the rotating member 3 is realized.

[0149] As shown in FIG. 15 and FIG. 16, the second track groove 5B can be arranged on the second connecting rod 2A, and the second rail column 5A that can slide in the second track groove 5B can be arranged on the rotating member 3. By the cooperation of the second rail column 5A and the second track groove 5B, the conversion between the linear motion of the second connecting rod 2A and the rotating motion of the rotating member 3 is realized.

[0150] In some display devices, in order to avoid interference phenomenon during the rotation of the first housing 11 and the third housing 13, the present application provides a realizable mode.

[0151] As shown in FIG. 17, FIG. 17 simply shows the positional relationship of the first connecting rod 1A, the second connecting rod 2A and the rotating member 3. The rotating member 3 has a first position Q1 connected with the first connecting rod 1A, and the rotating member 3 has a second position Q2 connected with the second connecting rod 2A. The distance between the first position Q1 and the rotation axis of the rotating member 3 is r1, and the distance between the second position Q2 and the rotation axis of the rotating member 3 is r2, wherein r2 is not equal to r1.

[0152] According to v = ωr, since ω is a constant, r2 is not equal to r1, so that v2 is not equal to v1, which can make the moving speed of the first connecting rod 1A and the second connecting rod 2A different, and then the opening and closing speed of the first housing 11 and the opening and closing speed of the third housing 13 different, and the opening and closing angle of the first housing 11 and the opening and closing angle of the third housing 13 different, so that the two housings can be opened and closed without interference.

[0153] In some display devices, as shown in FIG. 18, when the display device is in the closed state, the first housing 11, the third housing 13 and the second housing 12 are sequentially arranged from top to bottom, that is, the "G" type folding, in order to avoid the interference between the third housing 13 and the first housing 11 during the opening and closing process, r1 of FIG. 17 can be made smaller than r2, and within a certain angle range of the first housing 11 and the third housing during the opening and closing process, the opening and closing speed of the first housing 11 is smaller than that of the third housing 13, and the opening and closing angle of the first housing 11 and the opening angle of the third housing 13 are different, for example, the opening angle of the first housing 11 is larger than that of the third housing 13, so that the two housings can be opened and closed without interference.

[0154] For example, when the display device is switched from the flat state to the closed state, the first housing 11 or the third housing 13 can be flipped, and since the rotating speed of the third housing 13 is greater than that of the first housing 11 within a certain angle range of the first housing 11 and the third housing during the opening process, the third housing 13 is closed first, and the first housing 11 is closed later, thereby avoiding interference between the two.

[0155] For another example, when the display device is switched from the closed state to the flat state, the first housing 11 can be flipped, and since the rotating speed of the third housing 13 is greater than that of the first housing 11 within a certain angle range of the first housing 11 and the third housing during the closing process, the third housing 13 is flattened first, and the first housing 11 is flattened later, thereby avoiding interference between the two.

[0156] As shown in FIG. 19, the first track groove 4B is closer to the rotation axis Q of the rotating member 3 than the second track column 5A, which can make the connection position of the rotating member 3 and the first connecting rod 1A closer to the rotation axis of the rotating member 3 than the connection position of the rotating member 3 and the second connecting rod 2A.

[0157] In some examples, the connection position of the first connecting rod 1A to the rotating member 3 and the connection position of the second connecting rod 2A to the rotating member 3 are arranged along the rotation axis of the rotating member 3.

[0158] As shown in FIG. 20, in this example, at least two second track grooves 5B can be provided, for example, the first sub-track groove 5B1 and the second sub-track groove 5B2 can be included, and the tracks of the first sub-track groove 5B1 and the second sub-track groove 5B2 are different.

[0159] The tracks of the first sub-track groove 5B1 and the second sub-track groove 5B2 can be different, for example, in FIG. 20, the first track of the first sub-track groove 5B1 and the second track of the second sub-track groove 5B2 are shown by a black dashed line, and the bending curvatures of the first track and the second track are different; in another example, the bending curvatures of the first track of the first sub-track groove 5B1 and the second track of the second sub-track groove 5B2 are the same, and the spacing between the first sub-track groove 5B1 and the rotation axis of the rotating member 3 is different from the spacing between the first sub-track groove 5B1 and the rotation axis of the rotating member 3.

[0160] In the display device shown in FIG. 18 described above, for example, when the display device is switched from the closed state to the flat state, the first housing 11 can be flipped, the first track column 4A slides along the first track groove 4B, and when the second connecting rod 2A is driven to move, there can be a phenomenon of jamming and other motion that is not smooth, so that the rotating member 3 cannot drive the second connecting rod 2A to move. In the example of the present application, by providing the first sub-track groove 5B1 and the second sub-track groove 5B2 with different tracks, the jamming phenomenon can be inhibited, and the second connecting rod 2A can be smoothly moved under the drive of the rotating member 3.

[0161] In some other examples, at least two first track grooves 4B can be provided. For example, two first track grooves can be provided, and the tracks of the two first track grooves are different.

[0162] The first track groove 4B can have various track shapes, for example, the track shape of the first track groove 4B can be determined according to the rotation speed of the first housing 11, in the example of FIG. 20, the first track groove 4B is a strip structure, and the first track groove 4B of the strip structure extends along the radial direction of the rotating member 3. In some other examples, the first track groove 4B can be a curved arc structure.

[0163] The second track groove 5B can have various track shapes, for example, the track shape of the second track groove 5B can be determined according to the rotation speed of the third housing 13, in the example of FIG. 20, the first sub-track groove 5B1 and the second sub-track groove 5B2 are both curved arc structures. The bending curvatures of the first sub-track groove 5B1 and the second sub-track groove 5B2 are different.

[0164] In order to make the structure of the whole display device compact and realize miniaturization design, in the examples of FIG. 21 and FIG. 22, FIG. 22 is an exploded view of the first limiting plate 1B and the second limiting plate 2B of FIG. 21 and the rotating member 3. In FIG. 22, the first limiting plate 1B and the second limiting plate 2B enclose a receiving space 7, and the rotating member 3 is located in the receiving space 7.

[0165] As shown in FIG. 22, the rotating member 3 can be rotatably installed on the second housing by a pin shaft 8.

[0166] In some examples, as shown in FIG. 23, the limiting plates and the connecting rods are arranged along the direction from top to bottom. The connecting rods are moving parts relative to the second housing, and the limiting plates are static parts relative to the second housing. Arranging the moving connecting rods between the limiting plates and the second housing can avoid interference between the structure of the moving connecting rods and some structural parts or electronic devices. In addition, the structure of the limiting plates is simple, and the surface of the limiting plates is flat. Arranging the limiting plates above and making the surface of the limiting plates flush with the surface of the second housing can ensure the flatness of the display screen.

[0167] In some display devices, as shown in FIG. 24, FIG. 24 shows a structural view of the second housing 12. In this example, a mounting groove 121 can be arranged on the second housing 12, and the first limiting plate 1B, the second limiting plate 2B, the rotating member 3, the first connecting rod 1A and the second connecting rod 2A in FIG. 23 can be arranged in the mounting groove 121. In this way, the thickness of the whole display device will not be large, and the thickness of the display device can be compressed.

[0168] In some realizable structures, the surface of the first limiting plate 1B and the second limiting plate 2B can be made flush with the surface of the second housing 12, so as to avoid interference with the structure arranged on the second housing 12.

[0169] As shown in FIG. 24, a mounting hole 122 can be arranged on the second housing 12, and the pin shaft 8 in FIG. 23 for rotatably installing the rotating member 2 on the second housing 12 can be installed in the mounting hole 122, and the rotating member 3 can rotate around the pin shaft 8.

[0170] Returning to FIG. 23, since the first connecting rod 1A and the second connecting rod 2A are located below the rotating member 3, a gap can be formed between the first connecting rod 1A and the second connecting rod 2A, and the pin shaft 8 can pass through the gap and be arranged in the mounting hole 122 of the second housing 12.

[0171] FIGS. 25 to 27 are state structural views of the display terminal in the closed state according to the examples of the present application.

[0172] As shown in FIG. 25, when the display terminal is in the closed state, the first housing 11 and the third housing 13 are located on the same side of the second housing 12, and the third housing 13 is located between the first housing 11 and the second housing 12. Such a folding display terminal can be referred to as a "G-shaped" folding machine.

[0173] As shown in FIG. 26, with respect to the second connecting rod 2A, the first sub-rail 5A1 located in the first sub-track groove 5B1 is in the S11 position, and the second sub-rail 5A2 located in the second sub-track groove 5B2 is in the S21 position.

[0174] As shown in FIG. 27, with respect to the first connecting rod 1A, the first rail 4A located in the first track groove 4B is in the S31 position.

[0175] FIGS. 28 to 30 are state structure diagrams of the display terminal in the intermediate state according to the example of the present application.

[0176] As shown in FIG. 28, when the display terminal is switched from the closed state to the unfolded state, the user can turn the first housing 11 counterclockwise as shown in FIG. 28. By using the first hinge mechanism, the second hinge mechanism, and the linkage mechanism according to the example of the present application, the third housing 13 can be automatically rotated clockwise.

[0177] As shown in FIG. 29, when the first housing 11 is turned counterclockwise, the first connecting rod 1A can move to the right along the black solid line arrow shown in FIG. 29. The moving first connecting rod 1A drives the rotating member to rotate, the first sub-rail 5A1 located in the first sub-track groove 5B1 slides from the S11 position to the S12 position, and the second sub-rail 5A2 located in the second sub-track groove 5B2 slides from the S21 position to the S22 position. In the process of sliding the first sub-rail 5A1 and the second sub-rail 5A2, the second connecting rod 2A is driven to move to the left along the black dashed line arrow shown in FIG. 29.

[0178] As shown in FIG. 30, with respect to the first connecting rod 1A, when the rotating member rotates, the first rail 4A located in the first track groove 4B slides from the S31 position to the S32 position.

[0179] FIGS. 31 to 33 are state structure diagrams of the display terminal in the unfolded state according to the example of the present application.

[0180] As shown in FIG. 31, after the display terminal is switched from the intermediate state to the unfolded state, the first housing 11, the second housing 12, and the third housing 13 are substantially located in the same plane.

[0181] In the example of the present application, because the rotating speed of the third housing 13 is greater than the rotating speed of the first housing 11 within a certain angle range, the third housing 13 is in the unfolded state earlier than the first housing 11.

[0182] As shown in FIG. 32, when the third housing 13 is in the unfolded state, the first sub-rail post 5A1 located in the first sub-rail groove 5B1 is slid from the S12 position to the S13 position, and the second sub-rail post 5A2 located in the second sub-rail groove 5B2 is slid from the S22 position to the S23 position.

[0183] It can be understood that the first sub-rail post 5A1 is slid to the end of the first sub-rail groove 5B1, and the second sub-rail post 5A2 is slid to the end of the second sub-rail groove 5B2.

[0184] As shown in FIG. 33, when the first housing 11 is in the unfolded state, the first rail post 4A located in the first rail groove 4B is slid from the S32 position to the S33 position.

[0185] It can be understood that the first rail post 4A is slid to the end of the first rail groove 4B.

[0186] In the display terminal of the present application, the linkage mechanism connecting the first hinge mechanism and the second hinge mechanism is an asymmetric structure, which can transmit different motion effects to the two hinge mechanisms to realize different opening and closing speeds of the two hinge mechanisms and avoid mutual interference of the main bodies.

[0187] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any change or replacement within the technical scope disclosed in the present application should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A folding device (20) characterized by, The folding device (20) comprises: a first shell (11), a second shell (12) and a third shell (13); a first hinge mechanism (101), the first shell (11) and the second shell (12) are respectively rotatably connected with the first hinge mechanism (101); a second hinge mechanism (102), the second shell (12) and the third shell (13) are respectively rotatably connected with the second hinge mechanism (102); a linkage mechanism (103) located between the first hinge mechanism (101) and the second hinge mechanism (102), the linkage mechanism (103) comprises: a first connecting rod (1A) and a second connecting rod (2A), the first connecting rod (1A) is rotatably connected with the first hinge mechanism (101), the second connecting rod (2A) is rotatably connected with the second hinge mechanism (102), and the first connecting rod (1A) and the second connecting rod (2A) are both movable; a rotating piece (3), the rotating piece (3) is rotatably connected with the second shell (12), and the first connecting rod (1A) and the second connecting rod (2A) are both connected with the rotating piece (3); when the first shell (11) rotates relative to the second shell (12), the first connecting rod (1A) moves in a first direction, the rotating piece (3) rotates, the second connecting rod (2A) moves in a second direction, the third shell (13) rotates relative to the second shell (12), and the first direction and the second direction are both parallel to the arrangement direction of the first hinge mechanism (101) and the second hinge mechanism (102), and the first direction is opposite to the second direction.

2. The folding device (20) according to claim 1, characterized in that The connecting position of the first connecting rod (1A) and the rotating piece (3) is closer to the rotation axis of the rotating piece (3) than the connecting position of the second connecting rod (2A) and the rotating piece (3).

3. The folding device (20) according to claim 2, wherein one of the rotating piece (3) and the first connecting rod (1A) is provided with a first rail column (4A), and the other is provided with a first track groove (4B), the first rail column (4A) is slidingly arranged in the first track groove (4B); one of the rotating piece (3) and the second connecting rod (2A) is provided with a second rail column (5A), and the other is provided with a second track groove (5B), the second rail column (5A) is slidingly arranged in the second track groove (5B); the first rail column (4A) is closer to the rotation axis of the rotating piece (3) than the second rail column (5A).

4. The folding device (20) according to claim 3, characterized in that The second track groove (5B) comprises a first sub-track groove (5B1) and a second sub-track groove (5B2), and the tracks of the first sub-track groove (5B1) and the second sub-track groove (5B2) are different.

5. The folding device (20) according to any one of claims 2-4, characterized in that, The rotating piece (3) is in a disc-shaped structure, and the rotating piece (3) is rotatably installed on the second shell (12) through a pin shaft (8). The connecting position of the first connecting rod (1A) and the rotating member (3) and the connecting position of the second connecting rod (2A) and the rotating member (3) are arranged along the outer periphery of the pin shaft (8) with a spacing.

6. The folding device (20) according to any one of claims 1-5, characterized in that The linkage mechanism (103) further comprises: A first limiting plate (1B) and a second limiting plate (2B), the first limiting plate (2A) is fixedly connected with the first hinge mechanism (101), and the second limiting plate (2B) is fixedly connected with the second hinge mechanism (102); A first sliding groove (1C) extending along the first direction is formed on the first limiting plate (1B), and the first connecting rod (1A) is slidingly arranged in the first sliding groove (1C); A second sliding groove (2C) extending along the second direction is formed on the second limiting plate (2B), and the second connecting rod (2A) is slidingly arranged in the second sliding groove (2C).

7. The folding device (20) according to claim 6, characterized in that The first limiting plate (1B) and the second limiting plate (2B) enclose an accommodating space (7), and the rotating member (3) is located in the accommodating space (7).

8. The folding device (20) according to claim 6 or 7, characterized in that An installation groove (121) is formed on the second shell (12); The first connecting rod (1A), the second connecting rod (2A), the first limiting plate (1B), the second limiting plate (2B) and the rotating member (3) are arranged in the installation groove (121).

9. The folding device (20) according to claim 8, characterized in that The first connecting rod (1A) is located on the side of the first limiting plate (1B) close to the second shell (12), and the second connecting rod (2A) is located on the side of the second limiting plate (2B) close to the second shell (12); The first connecting rod (1A) and the second connecting rod (2A) have a gap, and the rotating member (3) is rotationally connected with the second shell (12) through a connecting member arranged in the gap.

10. The folding device (20) according to any one of claims 6-9, characterized in that The first hinge mechanism (101) comprises a first main shaft (101A) and a plurality of first rotating parts (101B) rotationally connected with the first main shaft (101A), each first rotating part (101B) is fixedly connected with the second shell (12), and the first limiting plate (1B) is fixedly connected with one first rotating part (101B).

11. The folding device (20) according to claim 10, characterized in that The first connecting rod (1A) is rotationally connected with another first rotating part (101B).

12. The folding device (20) according to any one of claims 1-11, characterized in that When the folding device is in the closed state, the first shell (11) and the third shell (13) are located on the same side of the second shell (12), and the third shell (13) is located between the first shell (11) and the second shell (12).

13. A display terminal, characterized by Comprise: A display screen (10); And the folding device (20) according to any one of claims 1-12; the display screen (10) is connected with the first shell (11), the second shell (12) and the third shell (13) in the folding device (20).

14. The display terminal according to claim 13, characterized in that, The display terminal comprises at least two linkage mechanisms (103); the arrangement direction of the at least two linkage mechanisms (103) is parallel to the extension direction of the first hinge mechanism (101).

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