Folding device and electronic equipment

Abstract

The embodiment of the invention provides a folding device and electronic equipment. The folding device comprises a shaft seat, a connecting assembly and a connecting door plate. The connecting assembly is connected with the shaft seat and the door plate. The shaft seat comprises a base and a cover plate. The base and the cover plate are stacked in the thickness direction of the shaft seat. The connecting assembly comprises a limiting swing arm. The limiting swing arm comprises a rotating end and a sliding seat. The rotating end is rotatably connected to the shaft seat. The sliding seat is slidably connected to the connecting door plate. The limiting swing arm further comprises a first stop part. The base is provided with a first bearing part in the width direction of the shaft seat. The limiting swing arm further comprises a second stop part. The second stopping part is arranged at the rotating end. In the thickness direction, the cover plate is provided with a second bearing part facing the base. The connecting door plate rotates relative to the shaft seat, so that when the connecting door plate is switched between the folding position and the unfolding position, the rotating end rotates relative to the shaft seat, and the sliding seat slides relative to the connecting door plate. When the connecting door plate is located at the unfolding position, the first stopping part abuts against the first bearing part, and the second stopping part abuts against the second bearing part.

Description

[0001] This application is a divisional application. The application number of the original application is 202311139166.7, and the original application date is September 4, 2023. The entire contents of the original application are incorporated into this application by reference. Technical Field

[0002] The embodiments of the present application relate to the field of terminal technology, and in particular to a folding device and an electronic device. Background Art

[0003] The display screen of an electronic device is used to present image information to the user. In some usage scenarios, the user expects the display screen of the electronic device to have a larger display area. Currently, electronic devices are single-screen displays, and a larger display area means that the size of the electronic device is larger, which makes the electronic device lose its portability.

[0004] In order to balance the size and display area of ​​the electronic device, the electronic device can adopt a folding structure. The electronic device includes a folding device and a flexible display screen. The folding device is used to carry the flexible display screen. The folding device includes an axle seat and a connecting door panel. The connecting door panel is rotatably connected to the axle seat. A portion of the flexible display screen is connected to the connecting door panel. When the electronic device is unfolded, the connecting door panel has a rotation angle that is too large relative to the axle seat, that is, the rotation angle of the connecting door panel exceeds a predetermined rotation angle, and the flexible display screen in the unfolded state is uneven, thereby deteriorating the display effect of the flexible display screen or causing adverse effects on the structure of the flexible display screen itself. Summary of the invention

[0005] The embodiments of the present application provide a folding device and an electronic device, which can effectively prevent the rotation angle of a connected door panel from exceeding a predetermined rotation angle.

[0006] In a first aspect, the present application provides a folding device for carrying a flexible display screen. The folding device includes an axle seat, a connecting assembly and a connecting door panel.

[0007] The connecting assembly connects the shaft seat and the connecting door panel. The connecting door panel has a first screen connecting surface. The shaft seat includes a base and a cover plate. The base and the cover plate are stacked in the thickness direction of the shaft seat. The base has a second screen connecting surface facing away from the cover plate. The connecting assembly includes a limit swing arm. The limit swing arm includes a rotating end and a sliding seat. The rotating end can be rotatably connected to the shaft seat. The sliding seat can be slidably connected to the connecting door panel. The limit swing arm also includes a first stopper. Along the width direction of the shaft seat, the base is provided with a first receiving portion. The first receiving portion is used to abut and cooperate with the first stopper. The limit swing arm also includes a second stopper. The second stopper is provided at the rotating end. Along the thickness direction, the cover plate is provided with a second receiving portion facing the base. The second receiving portion is used to abut and cooperate with the second stopper. Wherein, the connecting door panel rotates relative to the shaft seat, so that when switching between the folded position and the unfolded position, the rotating end rotates relative to the shaft seat, and the sliding seat slides relative to the connecting door panel. When the connecting door panel is in the unfolded position, the first stop portion abuts against the first receiving portion, and the second stop portion abuts against the second receiving portion.

[0008] The folding device of the embodiment of the present application includes an axle seat, a connecting assembly and a connecting door panel. The connecting assembly includes a limit swing arm. The limit swing arm is rotatably connected to the axle seat. The connecting door panel is connected to the limit swing arm. The limit swing arm is slidably connected to the connecting door panel. The limit swing arm includes a first stopper and a second stopper. The axle seat includes a first receiving surface and a second receiving surface. When the connecting door panel is in a predetermined unfolding position, the first stopper abuts against the first receiving surface, and the second stopper abuts against the second receiving surface, so that a limit zone is formed between the axle seat and the limit swing arm at different positions. The axle seat forms a limit constraint on the limit swing arm, so that after the limit swing arm is unfolded to the predetermined unfolding position, it is not easy to continue to rotate relative to the axle seat, so that after the connecting door panel connected to the limit swing arm is unfolded to the predetermined unfolding position, it is not easy to continue to rotate relative to the axle seat. Under the mutual limiting action of the limiting swing arm and the shaft seat, the limiting swing arm and the connecting door panel can be relatively stably maintained at the predetermined unfolding position, thereby effectively preventing the connecting door panel from rotating at an angle exceeding the predetermined rotation angle and preventing the connecting door panel from folding outward at an excessively large angle, thereby ensuring that the flexible display screen in the unfolded state has good flatness, preventing the flexible display screen from folding outward at an excessively large angle, and reducing the possibility that the flexible display screen folds outward at an excessively large angle, which may lead to poor display effects of the flexible display screen, or damage to the structure of the flexible display screen itself. The shaft seat and the limiting swing arm are limited by the first stop portion abutting against the first receiving portion and the second stop portion abutting against the second receiving portion, so that the total contact area of ​​the limiting zone formed between the shaft seat and the limiting swing arm is increased, so that the limiting swing arm and the connecting door panel in the unfolded position can bear a relatively large torque without excessive rotation relative to the shaft seat.

[0009] In a possible implementation, the first stop portion is a protrusion disposed on a surface of the slide seat facing away from the cover plate, so that the first stop portion has a relatively strong structural strength and can bear a relatively large torque.

[0010] In a possible implementation, the first receiving portion has a first receiving plane, which is perpendicular to the width direction, and the first stopping portion has a first stopping plane, which is used to abut against the first receiving plane.

[0011] When the first stop portion and the first receiving portion abut against each other, a contact surface formed between the first stop plane and the first receiving plane is a plane, which is beneficial to ensure a good fitting contact state between the first stop portion and the first receiving portion.

[0012] In a possible embodiment, the shaft seat further includes a positioning block. The positioning block is arranged on the base. Positioning blocks are respectively arranged on both sides of the first stopper along the length direction of the shaft seat. A third stopper is arranged on two opposite sides of the first stopper along the length direction of the shaft seat. The positioning block has a third receiving portion. The third receiving portion is used to abut and cooperate with the third stopper.

[0013] When the connecting door panel and the limiting swing arm are subjected to a force along the length direction of the axle seat, after the third stop portion abuts against the third supporting portion, a limiting constraint can be formed on the connecting door panel and the limiting swing arm in the length direction of the axle seat to prevent the connecting door panel and the axle seat from having relative movement along the length direction, and at the same time prevent the connecting door panel from having a relatively large movement relative to the axle seat along the length direction.

[0014] In a possible implementation, the third receiving portion has a third receiving plane, which is perpendicular to the length direction, and the third stopping portion has a third stopping plane, which is used to abut against the third receiving plane.

[0015] When the third stop portion and the third receiving portion abut against each other, a contact surface formed between the third stop plane and the third receiving plane is a plane, which is conducive to ensuring a good fitting contact state between the third stop portion and the third receiving portion.

[0016] In a possible implementation, along the length direction of the shaft seat, the distance between the two third receiving planes is greater than the distance between the two third stop planes.

[0017] The method in which the distance between the two third supporting planes is greater than the distance between the two third stop planes can reduce the impact of processing errors, which is beneficial to reducing the processing difficulty of the limit swing arm or the shaft seat, and also makes it easier for the positioning block to avoid the limit swing arm, reducing the difficulty of assembling the limit swing arm and the positioning block.

[0018] In a possible implementation, the slide seat has an avoidance gap, the avoidance gap avoids the positioning block, and when the rotating end rotates relative to the shaft seat, the positioning block is inserted into the avoidance gap or withdraws from the avoidance gap.

[0019] During the assembly process of the limit swing arm and the shaft seat, the positioning block and the avoidance notch can play a positioning role, making it easy to assemble the limit swing arm and the shaft seat quickly and accurately.

[0020] In a possible implementation, the rotating end includes a first arc-shaped plate. The shaft seat is provided with a first arc-shaped groove that is rotatably matched with the first arc-shaped plate. Along the width direction of the shaft seat, the second stopper is provided at the end of the first arc-shaped plate away from the slide seat.

[0021] Along the width direction of the shaft seat, the end of the first arc plate close to the slide seat is connected to the slide seat, and the second stop portion is arranged at the end of the first arc plate away from the slide seat. When the limit swing arm rotates relative to the shaft seat, the end of the first arc plate away from the slide seat moves closer to or away from the cover plate, so that the second stop portion moves closer to or away from the second receiving portion on the cover plate. When the limit swing arm and the connecting door panel are in a predetermined unfolding position, the second stop portion abuts against the second receiving portion to play a limiting role.

[0022] In a possible embodiment, a convex portion is provided at the end of the first arc-shaped plate away from the slide seat. Along the length direction of the shaft seat, at least one of the two opposite sides of the convex portion is provided with a second stop portion. The cover plate has an avoidance hole connected to the first arc-shaped groove. The avoidance hole avoids the convex portion. When the rotating end rotates relative to the shaft seat, the convex portion is inserted into the avoidance hole or withdraws from the avoidance hole.

[0023] When the rotating end rotates relative to the shaft seat, the convex part is inserted into the avoidance hole or withdrawn from the avoidance hole. The avoidance hole on the cover plate can prevent the convex part from interfering with the cover plate in position.

[0024] In a possible implementation, the second receiving portion has a second receiving plane, which is perpendicular to the thickness direction, and the second stopping portion has a second stopping plane, which is used to abut against the second receiving plane.

[0025] When the second stop portion and the second receiving portion abut against each other, a contact surface formed between the second stop plane and the second receiving plane is a plane, which is conducive to ensuring a good fitting contact state between the second stop portion and the second receiving portion.

[0026] In a possible implementation, along the thickness direction of the shaft seat, the base is provided with a fourth receiving portion facing the cover plate. The limit swing arm includes a fourth stopper. The fourth stopper is provided on the slide seat. The fourth stopper is used to abut and cooperate with the fourth receiving portion. When the connecting door panel is in the unfolded position, the fourth stopper abuts against the fourth receiving portion.

[0027] When the connecting door panel is in the unfolded position, the fourth stopper abuts against the fourth receiving portion. The fourth stopper and the fourth receiving portion can form a limiting area, which is beneficial to further improve the limiting capacity between the limiting swing arm and the shaft seat, and is beneficial for the limiting swing arm to bear a large rotational torque without excessive rotation relative to the shaft seat.

[0028] In a possible implementation, the fourth receiving portion has a fourth receiving plane, the fourth receiving plane is perpendicular to the thickness direction, the fourth stopping portion has a fourth stopping plane, and the fourth stopping plane is used to abut against the fourth receiving plane.

[0029] When the fourth stop portion and the fourth receiving portion abut against each other, a contact surface formed between the fourth stop plane and the fourth receiving plane is a plane, which is beneficial to ensure a good fitting contact state between the fourth stop portion and the fourth receiving portion.

[0030] In a possible embodiment, the connection assembly further includes a connecting swing arm. Along the length direction of the shaft seat, the limit swing arm and the connecting swing arm are arranged at intervals. One end of the connecting swing arm can be rotatably connected to the shaft seat, and the other end can be rotatably connected to the connecting door panel. The folding device further includes a supporting door panel. The supporting door panel is arranged on the connecting swing arm. The supporting door panel has a screen supporting surface. The supporting door panel is located between the shaft seat and the connecting door panel.

[0031] The support door panel is located between the connecting door panel and the shaft seat, and can cover the gap between the connecting door panel and the shaft seat. The support door panel is not connected to the flexible display screen. The screen support surface of the support door panel can be used to provide support for the flexible display screen, reducing the possibility of the flexible display screen being dented. Exemplarily, the support door panel can be used to provide support for the bending portion of the flexible display screen. For example, the support door panel is arranged in a transition area corresponding to the bending portion. The support door panel can be used to provide support for the transition area of ​​the bending portion.

[0032] In a possible embodiment, the connecting swing arm includes a second arc plate, a first stop boss, a third arc plate and a second stop boss. The second arc plate and the third arc plate are connected. The shaft seat is provided with a second arc groove that rotates with the second arc plate. The connecting door panel is provided with a third arc groove that rotates with the third arc plate. Along the length direction of the shaft seat, at least one side of the second arc plate is provided with a first stop boss, and at least one side of the third arc plate is provided with a second stop boss. The cover plate has a fifth receiving portion. The fifth receiving portion is used to abut and cooperate with the first stop boss. The connecting door panel has a sixth receiving portion. The sixth receiving portion is used to abut and cooperate with the second stop boss. When the connecting door panel is in the expanded position, the first stop boss abuts against the fifth receiving portion, and the second stop boss abuts against the sixth receiving portion.

[0033] The first stop boss and the fifth receiving portion can form a limit zone, while the second stop boss and the sixth receiving portion can form a limit zone. Therefore, the connecting swing arm can also play a role of limiting the connection door panel, so that the connection door panel in the unfolded position can bear a large torque without excessive rotation relative to the shaft seat.

[0034] In a possible embodiment, the shaft seat has a first arc-shaped limit groove. The first arc-shaped limit groove is connected to the second arc-shaped limit groove. Along the length direction of the shaft seat, the first stop boss is inserted into the first arc-shaped limit groove. The first stop boss and the first arc-shaped limit groove are rotatably matched. Along the width direction of the shaft seat, the wall surface of the cover plate facing the first arc-shaped limit groove forms a fifth receiving portion.

[0035] In a possible embodiment, the connecting door panel has a second arc-shaped limit groove. The second arc-shaped limit groove is connected to the third arc-shaped limit groove. Along the length direction of the shaft seat, the second stop boss is inserted into the second arc-shaped limit groove. The second stop boss and the second arc-shaped limit groove are rotatably matched. The wall surface of the connecting door panel facing the second arc-shaped limit groove forms a sixth receiving portion.

[0036] In a possible embodiment, the connection assembly further includes a synchronous transmission swing arm. The synchronous transmission swing arm includes a transmission part and a sliding part. The transmission part is rotatably connected to the shaft seat. The sliding part is slidably connected to the connecting door panel. Along the length direction of the shaft seat, the limit swing arm and the synchronous transmission swing arm are spaced apart. When the connecting door panel rotates relative to the shaft seat, the transmission part rotates relative to the shaft seat, and the sliding part slides relative to the connecting door panel.

[0037] A second aspect of the present application provides an electronic device, which includes a folding device, a screen support body and a flexible display screen as described in the above embodiment.

[0038] The screen support body is connected to the connecting door panel. The flexible display screen includes a non-bending portion and a bending portion. Along the width direction of the shaft seat, the bending portion is located between the two non-bending portions. The shaft seat and the connecting assembly are located below the bending portion. The non-bending portion is connected to the screen support body. The first screen connecting surface is connected to the non-bending portion. The second screen connecting surface is connected to the bending portion. When the screen support body is in a folded state, the screen support body is located between the two non-bending portions.

[0039] In a possible implementation, the bending portion includes a middle area and a transition area. Along the width direction of the shaft seat, the middle area is located between the two transition areas. The middle area is connected to the second screen connection surface. The transition area is connected to the non-bending portion.

[0040] During the folding or unfolding process of the flexible display, the transition area of ​​the bending part is bent or unfolded, while the relative position between the middle area of ​​the bending part and the shaft seat does not change. The shaft seat can provide a limit constraint on the bending part through the middle area, which is conducive to improving the deformation consistency and synchronization of the transition areas on both sides of the middle area. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0042] Figure 2A schematic diagram of the structure of an electronic device in a half-folded state provided by an embodiment of the present application;

[0043] Figure 3 A schematic diagram of the structure of an electronic device in a folded state provided by an embodiment of the present application;

[0044] Figure 4 A schematic diagram of a partial exploded structure of an electronic device provided in an embodiment of the present application;

[0045] Figure 5 A schematic diagram of a partial exploded structure of an electronic device provided in an embodiment of the present application;

[0046] Figure 6 A schematic diagram of the structure of a folding device provided in an embodiment of the present application;

[0047] Figure 7 A schematic diagram of the structure of an electronic device in an over-folded state provided for related technologies;

[0048] Figure 8 A schematic diagram of a partial exploded structure of a folding device provided in an embodiment of the present application;

[0049] Fig. 9 A schematic diagram of a partial structure of a folding device provided in an embodiment of the present application;

[0050] Fig.10 A schematic diagram of the structure of a limit swing arm provided in an embodiment of the present application;

[0051] Fig.11 A schematic diagram of the structure of a folding device in an unfolded state provided in an embodiment of the present application;

[0052] Fig.12 for Fig.11 The enlarged schematic diagram of K in the middle;

[0053] Fig.13 for Figure 8 The enlarged schematic diagram of the middle W;

[0054] Fig.14 for Fig.13 The enlarged schematic diagram of the M in the middle;

[0055] Fig.15 for Fig.12 A schematic diagram of the cross-sectional structure along the S1-S1 direction;

[0056] Fig.16 for Fig.12 A schematic diagram of the cross-sectional structure along the S2-S2 direction;

[0057] Fig.17 A schematic diagram of a partial cross-sectional structure of a folding device provided in an embodiment of the present application;

[0058] Fig.18 A schematic diagram of the structure of the connecting swing arm provided in an embodiment of the present application;

[0059] Fig.19 for Fig.12 A schematic diagram of the cross-sectional structure along the S3-S3 direction;

[0060] Fig. 20 A schematic diagram of the structure of a synchronous transmission swing arm provided in an embodiment of the present application;

[0061] Fig.21 for Fig.12 A schematic diagram of the cross-sectional structure along the S4-S4 direction;

[0062] Fig. 22 for Fig.12 Schematic diagram of the cross-sectional structure along the S5-S5 direction.

[0063] Reference numerals:

[0064] 10. Electronic equipment;

[0065] 20. flexible display screen; 21. non-bending portion; 22. bending portion; 221. middle area; 222. transition area;

[0066] 30. Folding device;

[0067] 40, shaft seat; 40a, second screen connection surface; 40b, first arc groove; 40c, second arc groove; 40d, first arc limit groove;

[0068] 41. Base;

[0069] 411, first receiving portion; 411a, first receiving plane;

[0070] 412, fourth receiving portion; 412a, fourth receiving plane;

[0071] 42. Cover plate; 42a. Avoidance hole;

[0072] 421, second receiving portion; 421a, second receiving plane;

[0073] 422, the fifth receiving section;

[0074] 43. Positioning block;

[0075] 431, third receiving portion; 431a, third receiving plane;

[0076] 50. Connecting components;

[0077] 51, limit swing arm; 51a, rotating end; 51b, sliding seat; 51c, first arc plate; 51d, convex part; 51e, avoidance gap;

[0078] 511, first stop portion; 511a, first stop plane;

[0079] 512, second stop portion; 512a, second stop plane;

[0080] 513, third stop portion; 513a, third stop plane;

[0081] 514, fourth stop portion; 514a, fourth stop plane;

[0082] 52. Connect the swing arm;

[0083] 521, second curved plate;

[0084] 522, the third curved plate;

[0085] 523, first stop boss;

[0086] 524, second stop boss;

[0087] 53, synchronous transmission swing arm; 53a, meshing tooth portion; 531, transmission portion; 532, sliding portion;

[0088] 60, connecting door panel; 60a, first screen connecting surface; 60b, sixth receiving portion; 60c, second arc-shaped limiting groove; 60d, third arc-shaped groove;

[0089] 70. Screen support body;

[0090] 80, supporting door panel; 80a, supporting surface of screen;

[0091] X, width direction;

[0092] Y, length direction;

[0093] Z, thickness direction. DETAILED DESCRIPTION

[0094] The electronic device in the embodiments of the present application may be referred to as user equipment (UE) or terminal, etc. For example, the electronic device may be a portable android device (PAD), a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device, a vehicle-mounted device, a wireless terminal in industrial control, a wireless terminal in remote medical, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. Mobile terminals or fixed terminals. The form of the terminal device is not specifically limited in the embodiments of the present application.

[0095] In the embodiment of the present application, Figure 1 The structure of the electronic device 10 is schematically shown. Figure 1 As shown, the electronic device 10 is a handheld device with a wireless communication function as an example for explanation. The handheld device with a wireless communication function may be, for example, a folding screen device. The folding screen device may be a foldable mobile phone including a foldable flexible display screen. The embodiment of the present application is explained by taking the electronic device 10 with an external folding design as an example. For the electronic device 10 with an external folding design, when the electronic device 10 is in a folded state, the flexible display screen is located on the outside, that is, the flexible display screen is in a visible state.

[0096] Figure 2 The structure of the electronic device 10 in a half-folded state is schematically shown. Figure 3 The structure of the electronic device 10 in the folded state is schematically shown. Figure 2 and Figure 3 As shown, the electronic device 10 includes a flexible display screen 20 and a folding device 30. The folding device 30 is used to carry the flexible display screen 20. The flexible display screen 20 includes a display portion for displaying image information. The flexible display screen 20 itself has a bendable property and can be folded after being acted upon by an external force. When the electronic device 10 is in an unfolded state, the display portion of the flexible display screen 20 unfolds to present image information to the user.

[0097] Figure 4 A partial exploded structure of the electronic device 10 is schematically shown. Figure 5 A partial exploded structure of the electronic device 10 is schematically shown. Figure 6 The structure of the folding device 30 is schematically shown. Figure 4 , Figure 5 and Figure 6As shown, the folding device 30 includes an axle seat 40, a connecting assembly 50, a connecting door panel 60 and a screen support body 70. The connecting assembly 50 connects the axle seat 40 and the connecting door panel 60. The screen support body 70 is connected to the connecting door panel 60. The flexible display screen 20 can be connected to the connecting door panel 60 and the screen support body 70. The connecting door panel 60 has a first screen connecting surface 60a. The flexible display screen 20 can be connected to the first screen connecting surface 60a. Exemplarily, the flexible display screen 20 can be bonded to the first screen connecting surface 60a.

[0098] Exemplarily, along the width direction X of the shaft seat 40 , screen support bodies 70 may be respectively disposed on opposite sides of the shaft seat 40 .

[0099] Exemplarily, the screen support body 70 and the connecting door panel 60 may be connected using fasteners such as screws.

[0100] Exemplarily, the screen support body 70 may be a middle frame.

[0101] The connecting door panel 60 and the screen support body 70 can be rotated and folded relative to the shaft seat 40. When a rotational torque is applied to the screen support body 70, the screen support body 70 can drive the connecting door panel 60 to rotate synchronously relative to the shaft seat 40. In the embodiment of the present application, an electronic device 10 including two screen supports 70 and two connecting door panels 60 is used as an example for explanation. One screen support body 70 can be used as a main support body, and the other can be used as a secondary support body. For example, along the width direction X of the shaft seat 40, the width of the screen support body 70 as the main support body can be greater than the width of the screen support body 70 as the secondary support body. When the two screen supports 70 are stacked on each other, the electronic device 10 is in a folded state. When the two screen supports 70 move away from each other from the stacked state and unfold to a plane, the electronic device 10 is in an unfolded state. The process of the screen support body 70 from the folded state to the unfolded state is an unfolding process, and the process from the unfolded state to the folded state is a folding process.

[0102] Accordingly, when the electronic device 10 switches between the folded state and the unfolded state, the screen support body 70 drives the connecting door panel 60 to rotate relative to the shaft seat 40, so that the connecting door panel 60 switches between the folded position and the unfolded position. When the electronic device 10 is in the unfolded state, the first screen connecting surfaces 60a of the connecting door panels 60 on both sides of the shaft seat 40 are unfolded to the same plane. When the electronic device 10 is in the unfolded state, the flexible display screen 20 remains flat to present a good display effect.

[0103] The flexible display screen 20 may include a non-bending portion 21 and a bending portion 22. The non-bending portion 21 is arranged corresponding to the screen support body 70 and the connecting door panel 60. The screen support body 70 and the connecting door panel 60 are located below the non-bending portion 21. After the non-bending portion 21 is connected to the screen support body 70 and the connecting door panel 60, the relative positions between the non-bending portion 21 and the screen support body 70 and between the non-bending portion 21 and the connecting door panel 60 are fixed, so that during the folding or unfolding of the screen support body 70 and the connecting door panel 60, it is not easy for the non-bending portion 21 and the screen support body 70 to move relative to each other, and it is not easy for the non-bending portion 21 and the connecting door panel 60 to move relative to each other. Exemplarily, the non-bending portion 21 may be bonded to the screen support body 70. The non-bending portion 21 may be bonded to the first screen connecting surface 60a of the connecting door panel 60.

[0104] Along the width direction X of the shaft seat 40, the bending portion 22 is located between the two non-bending portions 21, that is, the bending portion 22 is located between the two non-bending portions 21. The bending portion 22 can be arranged corresponding to the shaft seat 40 and the connecting assembly 50. The shaft seat 40 and the connecting assembly 50 are located below the bending portion 22.

[0105] When the two screen supports 70 are in a folded state, the flexible display screen 20 is in a bent state. When the two screen supports 70 are in a folded state, the two screen supports 70 are located between the two non-bending portions 21. The flexible display screen 20 is located on the outside of the screen supports 70, so that the flexible display screen 20 can be observed when observed from the outside. The bending portion 22 of the flexible display screen 20 can be bent into an arc shape. When the two screen supports 70 are in an unfolded state, the non-bending portion 21 and the bending portion 22 of the flexible display screen 20 are in an unfolded state. The electronic device 10 can change its overall size by folding or unfolding, and can also have a relatively large display area in the unfolded state.

[0106] In some feasible embodiments, at least part of the bending portion 22 is in a free state, that is, at least part of the bending portion 22 is not connected to the folding device 30, which helps to ensure that the bending portion 22 can be bent or unfolded smoothly.

[0107] In some achievable embodiments, a portion of the bent portion 22 is connected to the shaft seat 40. The shaft seat 40 has a second screen connection surface 40a. The first screen connection surface 60a connected to the door panel 60 and the second screen connection surface 40a of the shaft seat 40 are located on the same side. The first screen connection surface 60a connected to the door panel 60 and the second screen connection surface 40a of the shaft seat 40 are both arranged facing the flexible display screen 20. The bent portion 22 can be connected to the second screen connection surface 40a. Exemplarily, the bent portion 22 can be bonded to the second screen connection surface 40a.

[0108] In some examples, the bending portion 22 includes a middle region 221 and a transition region 222. Along the width direction X of the shaft seat 40, the middle region 221 is located between the two transition regions 222. The middle region 221 is connected to the shaft seat 40. Exemplarily, the middle region 221 is bonded to the shaft seat 40. For example, the middle region 221 is bonded to the second screen connection surface 40a of the shaft seat 40. Exemplarily, along the width direction X of the shaft seat 40, the width of the connection region between the middle region 221 and the shaft seat 40 can be less than the width of the shaft seat 40 itself. The transition region 222 located on the same side of the middle region 221 is connected to the non-bending portion 21. During the folding or unfolding process of the flexible display screen 20, the transition region 222 of the bending portion 22 is bent or unfolded, and the relative position of the middle region 221 of the bending portion 22 and the shaft seat 40 does not change. The shaft seat 40 can provide a limiting constraint on the bending portion 22 through the middle region 221 , which is beneficial to improving the deformation consistency and synchronization of the transition regions 222 on both sides of the middle region 221 .

[0109] In the related technology, Figure 7 The structure of the electronic device 10 in the over-folded state is schematically shown. Figure 7 As shown, for an electronic device 10 with an external folding design, after the screen support 70 transitions from a folded state to an unfolded state, when a large force is accidentally applied to the screen support 70, the screen support 70 will drive the connecting door panel 60 to continue to rotate relative to the shaft seat 40, thereby causing the connecting door panel 60 to rotate at a rotation angle exceeding a predetermined rotation angle, and further causing the flexible display screen 20 to fold outward at an excessively large angle, so that the display surface of the flexible display screen 20 is in a bent state instead of a flat state. When the rotation angle of the connecting door panel 60 exceeds the predetermined rotation angle, the first screen connecting surface 60a of the connecting door panel 60 and the second screen connecting surface 40a of the shaft seat 40 are not in the same plane. When the flexible display screen 20 folds outward at an excessively large angle, the display effect of the flexible display screen 20 will deteriorate, or the flexible display screen 20 may be squeezed and its own structure may be damaged.

[0110] In the electronic device 10 of the embodiment of the present application, the connecting component 50 connects the shaft seat 40 and the connecting door panel 60. The connecting component 50 has a limiting swing arm. When the connecting door panel 60 is in the unfolded position, the limiting swing arm can form a stop limit with the shaft seat 40, so that when the connecting door panel 60 is subjected to an unexpected force, the connecting door panel 60 is limited by the limiting swing arm and is not easy to continue to rotate relative to the shaft seat 40, but is stably maintained in the predetermined unfolded position. Therefore, the connecting component 50 in the electronic device 10 can effectively prevent the connecting door panel 60 from rotating at an angle exceeding a predetermined rotation angle, and prevent the connecting door panel 60 from folding outward at an excessively large angle, so as to ensure that the flexible display screen 20 in the unfolded state has good flatness, prevent the flexible display screen 20 from folding outward at an excessively large angle, and reduce the possibility that the flexible display screen 20 folds outward at an excessively large angle, which may cause the display effect of the flexible display screen 20 to deteriorate, or the structure of the flexible display screen 20 itself may be damaged.

[0111] Figure 8 The partially exploded structure of the folding device 30 is schematically shown. Fig. 9 The partial structure of the folding device 30 is schematically shown. Figure 5 , Figure 8 and Fig. 9 As shown, the folding device 30 of the embodiment of the present application includes an axle seat 40, a connecting assembly 50 and a connecting door plate 60. The connecting assembly 50 connects the axle seat 40 and the connecting door plate 60. The connecting door plate 60 is used to connect the screen support body 70. The connecting door plate 60 can be a strip-shaped structure.

[0112] The shaft seat 40 of the embodiment of the present application can provide a mounting base for the related structural parts in the folding device 30. The shaft seat 40 can be a bar-shaped structure as a whole. When the two screen support bodies 70 rotate relative to the shaft seat 40, the position of the shaft seat 40 can remain relatively fixed.

[0113] The shaft seat 40 includes a base 41 and a cover plate 42. The base 41 and the cover plate 42 are stacked along the thickness direction Z of the shaft seat 40. The cover plate 42 is detachably connected to the base 41. Exemplarily, the cover plate 42 can be connected to the base 41 using fasteners such as screws. The base 41 has a second screen connection surface 40a facing away from the cover plate 42. The bending portion 22 of the flexible display screen 20 can be connected to the second screen connection surface 40a on the base 41.

[0114] Fig.10 The structure of the limiting swing arm 51 is schematically shown. Fig. 9 and Fig.10As shown, the connection assembly 50 includes a limit swing arm 51. The limit swing arm 51 includes a rotating end 51a and a sliding seat 51b. The rotating end 51a is rotatably connected to the shaft seat 40. The sliding seat 51b is slidably connected to the connecting door panel 60. When the connecting door panel 60 rotates relative to the shaft seat 40 to switch between the folded position and the unfolded position, the rotating end 51a of the limit swing arm 51 rotates relative to the shaft seat 40, and the sliding seat 51b of the limit swing arm 51 slides relative to the connecting door panel 60. The limit swing arm 51 is connected to the connecting door panel 60 through the sliding seat 51b. When the connecting door panel 60 is in the unfolded position, a limit area is formed between the limit swing arm 51 and the shaft seat 40 to form a limit constraint on the connecting door panel 60, so that the connecting door panel 60 is stably maintained at a predetermined unfolded position, so that the connecting door panel 60 is not easy to continue to rotate relative to the shaft seat 40, and the possibility of the rotation angle of the connecting door panel 60 exceeding the predetermined rotation angle is reduced.

[0115] Fig.11 The structure of the folding device 30 in the unfolded state is schematically shown. Fig.12 for Fig.11 Enlarged view of K in the middle. Fig.13 for Figure 8 Enlarged view of the middle W. Fig.14 for Fig.13 Enlarged view of point M in the middle. Fig.15 for Fig.12 Cross-sectional structure along S1-S1 direction. Fig.16 for Fig.12 The cross-sectional structure along the S2-S2 direction. Figures 11 to 16 The description of the embodiments of the present application will continue.

[0116] See also Fig.10 and Fig.15 As shown, the limiting swing arm 51 also includes a first stopper 511. Along the width direction X of the shaft seat 40, the base 41 is provided with a first receiving portion 411. The first receiving portion 411 is provided on the rotation path of the first stopper 511. The first receiving portion 411 is used to abut and cooperate with the first stopper 511. When the connecting door panel 60 rotates relative to the shaft seat 40 to switch between the folded position and the unfolded position, the first stopper 511 approaches or moves away from the first receiving portion 411. When the connecting door panel 60 is in the unfolded position, the first stopper 511 abuts against the first receiving portion 411, so that the limiting swing arm 51 is constrained by the shaft seat 40, so that the limiting swing arm 51 is not easy to continue to rotate relative to the shaft seat 40. Therefore, the connecting door panel 60 connected to the limiting swing arm 51 is constrained by the limiting position, so that the connecting door panel 60 is not easy to continue to rotate relative to the shaft seat 40, so that the connecting door panel 60 is kept in a predetermined unfolded position.

[0117] See also Fig.10 , Fig.14 and Fig.16As shown, the limiting swing arm 51 also includes a second stopper 512. The second stopper 512 is arranged at the rotating end 51a. Along the thickness direction Z of the shaft seat 40, the cover plate 42 is provided with a second receiving portion 421 facing the base 41. The second receiving portion 421 is arranged on the rotation path of the second stopper 512. The second receiving portion 421 is used to abut and cooperate with the second stopper 512. When the connecting door panel 60 rotates relative to the shaft seat 40 to switch between the folded position and the unfolded position, the second stopper 512 approaches or moves away from the second receiving portion 421. When the connecting door panel 60 is in the unfolded position, the second stopper 512 abuts against the second receiving portion 421, so that the limiting swing arm 51 is constrained by the shaft seat 40, so that the limiting swing arm 51 is not easy to continue to rotate relative to the shaft seat 40. Therefore, the connecting door panel 60 connected to the limiting swing arm 51 is subject to limiting constraints, so that the connecting door panel 60 is not easy to continue to rotate relative to the shaft seat 40, so that the connecting door panel 60 is maintained in a predetermined unfolding position.

[0118] When the connecting door panel 60 switches from the unfolded position to the folded position, the connecting door panel 60 drives the limiting swing arm 51 to rotate synchronously relative to the shaft seat 40, so that the first stopper 511 and the first receiving portion 411 are disengaged, and the second stopper 512 and the second receiving portion 421 are disengaged. The first stopper 511 gradually moves away from the first receiving portion 411, and the second stopper 512 gradually moves away from the second receiving portion 421.

[0119] When the connecting door panel 60 switches from the folded position to the unfolded position, the connecting door panel 60 drives the limiting swing arm 51 to rotate synchronously relative to the shaft seat 40, so that the first stop portion 511 gradually approaches the first receiving portion 411, and the second stop portion 512 gradually approaches the second receiving portion 421. When the connecting door panel 60 rotates to the unfolded position, the first stop portion 511 contacts the first receiving portion 411, and the second stop portion 512 contacts the second receiving portion 421.

[0120] When the connecting door panel 60 is in the unfolded position, the first stopper 511 abuts against the first receiving portion 411, and the second stopper 512 abuts against the second receiving portion 421, so that a limiting area can be formed at different positions between the limiting swing arm 51 and the shaft seat 40. The first stopper 511 and the second stopper 512 jointly form a stopper for the limiting swing arm 51, which is conducive to increasing the total contact area of ​​the limiting area between the limiting swing arm 51 and the shaft seat 40, and improving the torque resistance of the limiting swing arm 51, so that the limiting swing arm 51 and the connecting door panel 60 in the unfolded position can bear a large torque without excessive rotation relative to the shaft seat 40, and reduce the possibility that the limiting swing arm 51 excessively rotates and causes the rotation angle of the limiting swing arm 51 and the connecting door panel 60 to exceed the predetermined rotation angle.

[0121] The folding device 30 of the embodiment of the present application includes an axle seat 40, a connecting assembly 50 and a connecting door panel 60. The connecting assembly 50 includes a limit swing arm 51. The limit swing arm 51 is rotatably connected to the axle seat 40. The connecting door panel 60 is connected to the limit swing arm 51. The limit swing arm 51 is slidably connected to the connecting door panel 60. The limit swing arm 51 includes a first stopper 511 and a second stopper 512. The axle seat 40 includes a first receiving surface and a second receiving surface. When the connecting door panel 60 is in a predetermined unfolding position, the first stopper 511 abuts against the first receiving surface, and the second stopper 512 abuts against the second receiving surface, so that a limit zone is formed between the axle seat 40 and the limit swing arm 51 at different positions. The shaft seat 40 forms a limiting constraint on the limiting swing arm 51, so that after the limiting swing arm 51 is unfolded to the predetermined unfolding position, it is not easy to continue to rotate relative to the shaft seat 40, so that after the connecting door panel 60 connected to the limiting swing arm 51 is unfolded to the predetermined unfolding position, it is not easy to continue to rotate relative to the shaft seat 40. Under the mutual limiting action of the limiting swing arm 51 and the shaft seat 40, the limiting swing arm 51 and the connecting door panel 60 can be relatively stably maintained at the predetermined unfolding position, thereby effectively preventing the connecting door panel 60 from rotating at an angle exceeding the predetermined rotation angle and preventing the connecting door panel 60 from folding outward at an excessively large angle, thereby ensuring that the flexible display screen 20 in the unfolded state has good flatness, preventing the flexible display screen 20 from folding outward at an excessively large angle, and reducing the possibility that the flexible display screen 20 folds outward at an excessively large angle, resulting in poor display effect of the flexible display screen 20, or damage to the structure of the flexible display screen 20 itself. The axle seat 40 and the limiting swing arm 51 are limited by the first stop portion 511 abutting against the first receiving portion 411 and the second stop portion 512 abutting against the second receiving portion 421, so that the total contact area of ​​the limiting zone formed between the axle seat 40 and the limiting swing arm 51 is increased, so that the limiting swing arm 51 in the expanded position and the connecting door panel 60 can bear a relatively large torque without excessive rotation relative to the axle seat 40.

[0122] In some possible implementations, see Fig.10 and Fig.15 As shown, the first stopper 511 in the limit swing arm 51 is a convex block disposed on the surface of the slide 51b facing away from the cover plate 42, so that the first stopper 511 has a strong structural strength and can bear a relatively large torque. When the folding device 30 carries the flexible display screen 20, the first stopper 511 is disposed facing the flexible display screen 20.

[0123] Exemplarily, the first stop portion 511 , the rotating end 51 a and the sliding seat 51 b may be an integrally formed structure, which is beneficial to improving the overall structural strength of the limiting swing arm 51 .

[0124] Exemplarily, along the width direction X of the shaft seat 40 , a first receiving portion 411 is provided on the side wall of the base 41 .

[0125] In some examples, the first receiving portion 411 has a first receiving plane 411a. The first receiving plane 411a may be perpendicular to the width direction X of the shaft seat 40. The first stop portion 511 has a first stop plane 511a. The first stop plane 511a is used to abut against the first receiving plane 411a. When the connecting door panel 60 and the limiting swing arm 51 are in the unfolded position and the first stop portion 511 abuts against the first receiving portion 411, the first stop plane 511a may be perpendicular to the width direction X of the shaft seat 40.

[0126] When the first stop portion 511 and the first receiving portion 411 abut against each other, the contact surface formed between the first stop plane 511a and the first receiving plane 411a is a plane, which is conducive to ensuring a good fitting contact state between the first stop portion 511 and the first receiving portion 411.

[0127] In some possible implementations, see Fig.14 and Fig.15 As shown, along the thickness direction Z of the shaft seat 40, the base 41 is provided with a fourth receiving portion 412 facing the cover plate 42. The limiting swing arm 51 includes a fourth stopper 514. The fourth receiving portion 412 is arranged on the rotation path of the fourth stopper 514. The fourth stopper 514 can be arranged on the slide seat 51b. The fourth stopper 514 is used to abut and cooperate with the fourth receiving portion 412. When the connecting door panel 60 is in the unfolded position, the fourth stopper 514 abuts against the fourth receiving portion 412. The fourth stopper 514 and the fourth receiving portion 412 can form a limiting area, which is conducive to further improving the limiting capacity between the limiting swing arm 51 and the shaft seat 40, and is conducive to the limiting swing arm 51 to bear a large rotational torque without excessive rotation relative to the shaft seat 40.

[0128] For some examples, see Fig.16 As shown, the fourth receiving portion 412 has a fourth receiving plane 412a. The fourth receiving plane 412a can be perpendicular to the thickness direction Z of the shaft seat 40. The fourth receiving portion 412 is arranged close to the first receiving portion 411. The fourth stop portion 514 has a fourth stop plane 514a. The fourth stop plane 514a is used to abut against the fourth receiving plane 412a. When the fourth stop portion 514 and the fourth receiving portion 412 abut against each other, the fourth stop plane 514a can be perpendicular to the thickness direction Z of the shaft seat 40.

[0129] When the fourth stop portion 514 and the fourth receiving portion 412 abut against each other, the contact surface formed between the fourth stop plane 514a and the fourth receiving plane 412a is a plane, which is conducive to ensuring a good fitting contact state between the fourth stop portion 514 and the fourth receiving portion 412.

[0130] In some achievable ways, Fig.17 The partial cross-sectional structure of the folding device 30 is schematically shown. Fig.14 and Fig.17 As shown, the shaft seat 40 further includes a positioning block 43. The positioning block 43 is disposed on the base 41. Along the length direction Y of the shaft seat 40, the positioning blocks 43 are respectively disposed on both sides of the first stopper 511. Along the length direction Y of the shaft seat 40, the third stopper 513 is disposed on the opposite sides of the first stopper 511. The positioning block 43 has a third receiving portion 431. The third receiving portion 431 is used to abut and cooperate with the third stopper 513.

[0131] When the connecting door panel 60 and the limiting swing arm 51 are subjected to a force along the length direction Y of the axle seat 40, after the third stop portion 513 abuts against the third receiving portion 431, a limiting constraint can be formed on the connecting door panel 60 and the limiting swing arm 51 in the length direction Y of the axle seat 40, thereby preventing the connecting door panel 60 and the axle seat 40 from having relative movement along the length direction Y, and at the same time preventing the connecting door panel 60 from having a relatively large movement relative to the axle seat 40 along the length direction Y.

[0132] The connecting door plate 60 and the shaft seat 40 are both connected to the flexible display screen 20. When the connecting door plate 60 and the shaft seat 40 move relative to each other along the length direction Y, and the connecting door plate 60 moves relatively much along the length direction Y, the connecting door plate 60 will apply a tensile force along the length direction Y to a part of the flexible display screen 20, resulting in stress concentration on the flexible display screen 20, and there is a possibility that the flexible display screen 20 is pulled by the connecting door plate 60 and damaged. In the embodiment of the present application, a limiting area can be formed between the limiting swing arm 51 and the shaft seat 40 by the third stopper 513 and the third receiving portion 431, thereby effectively reducing the possibility of the above-mentioned problem.

[0133] In some examples, the third receiving portion 431 has a third receiving plane 431a. The third receiving plane 431a may be perpendicular to the length direction Y of the shaft seat 40. The third stop portion 513 has a third stopping plane 513a. The third stopping plane 513a is used to abut against the third receiving plane 431a. The third stopping plane 513a may be perpendicular to the length direction Y of the shaft seat 40.

[0134] When the third stop portion 513 and the third receiving portion 431 abut against each other, the contact surface formed between the third stop plane 513a and the third receiving plane 431a is a plane, which is conducive to ensuring a good fitting contact state between the third stop portion 513 and the third receiving portion 431.

[0135] In some examples, along the length direction Y of the shaft seat 40, the distance between the two third receiving planes 431a is greater than the distance between the two third stop planes 513a, so that there is a clearance between the third receiving plane 431a and the third stop plane 513a. During the processing of the limiting swing arm 51 or the shaft seat 40, there is a processing error in the distance between the two third receiving planes 431a and the distance between the two third stop planes 513a along the length direction Y of the shaft seat 40. The manner in which the distance between the two third receiving planes 431a is greater than the distance between the two third stop planes 513a can reduce the influence of the processing error, which is conducive to reducing the processing difficulty of the limiting swing arm 51 or the shaft seat 40, and also facilitates the positioning block 43 to avoid the limiting swing arm 51, reducing the assembly difficulty of the limiting swing arm 51 and the positioning block 43.

[0136] Exemplarily, when the door panel 60 and the limit swing arm 51 are not subjected to the force in the length direction Y, there may be a distance between the third stop plane 513a and the third receiving plane 431a on both sides of the first stop portion 511. When the door panel 60 and the limit swing arm 51 are subjected to the force in the length direction Y, the limit swing arm 51 is displaced in the length direction Y to reduce the distance between the third stop plane 513a on one side of the first stop portion 511 and the third receiving plane 431a. After the third stop plane 513a on one side of the first stop portion 511 contacts and abuts the third receiving plane 431a, the limit swing arm 51 is constrained by the shaft seat 40 and no longer displaced in the length direction Y.

[0137] Exemplarily, when the connecting door panel 60 and the limiting swing arm 51 are not subjected to a force along the length direction Y, there may be a spacing between the third stop plane 513a located on one side of the first stop portion 511 and the third supporting plane 431a, while the third stop plane 513a and the third supporting plane 431a located on the other side of the first stop portion 511 may maintain a contact state.

[0138] For some examples, see Fig.10 and Fig.17 As shown, the slide seat 51b of the limit swing arm 51 has an avoidance gap 51e. The avoidance gap 51e is set corresponding to the positioning block 43. The avoidance gap 51e avoids the positioning block 43. When the rotating end 51a rotates relative to the shaft seat 40, the positioning block 43 is inserted into the avoidance gap 51e or withdraws from the avoidance gap 51e. Exemplarily, the number of positioning blocks 43 is two. The number of avoidance gaps 51e is two. During the assembly process of the limit swing arm 51 and the shaft seat 40, the positioning block 43 and the avoidance gap 51e can play a positioning role, which is convenient for quickly and accurately assembling the limit swing arm 51 and the shaft seat 40.

[0139] In some examples, the positioning block 43 and the base 41 are an integrally formed structure.

[0140] In some possible implementations, see Fig.14 and Fig.16 As shown, the rotating end 51a includes a first arc plate 51c. The shaft seat 40 is provided with a first arc groove 40b that is rotatably matched with the first arc plate 51c. When the limit swing arm 51 rotates relative to the shaft seat 40, the first arc plate 51c can rotate around the rotation axis in the first arc groove 40b of the shaft seat 40. The rotation axis does not pass through the first arc plate 51c itself. Therefore, the rotating end 51a and the shaft seat 40 are rotatably connected through a virtual axis structure, that is, the rotating end 51a and the shaft seat 40 are not mutually rotated through a physical axis, but are relatively rotated through the structure of the first arc plate 51c and the first arc groove 40b.

[0141] Along the width direction X of the shaft seat 40, the end of the first curved plate 51c close to the slide seat 51b is connected to the slide seat 51b, and the second stopper 512 is provided at the end of the first curved plate 51c away from the slide seat 51b. When the limiting swing arm 51 rotates relative to the shaft seat 40, the end of the first curved plate 51c away from the slide seat 51b moves toward or away from the cover plate 42, so that the second stopper 512 moves toward or away from the second receiving portion 421 on the cover plate 42. When the limiting swing arm 51 and the connecting door panel 60 are in a predetermined unfolding position, the second stopper 512 abuts against the second receiving portion 421 to play a limiting role.

[0142] In the embodiment of the present application, the second stop portion 512 and the second receiving portion 421 can form a limiting area, which is beneficial to further enhance the limiting capacity between the limiting swing arm 51 and the shaft seat 40, and is beneficial for the limiting swing arm 51 to bear a larger rotational torque without excessive rotation relative to the shaft seat 40.

[0143] In some examples, when the limiting swing arm 51 and the connecting door panel 60 are in the predetermined unfolding position, the first stopper 511 abuts against the first receiving portion 411, the second stopper 512 abuts against the second receiving portion 421, and the fourth stopper 514 abuts against the fourth receiving portion 412, so that a plurality of limiting areas can be formed at different positions between the limiting swing arm 51 and the shaft seat 40. The manner in which the first stopper 511, the second stopper 512 and the fourth stopper 514 jointly form a stopper for the limiting swing arm 51 is conducive to increasing the total contact area of ​​the limiting area formed between the limiting swing arm 51 and the shaft seat 40, and improving the torque resistance performance of the limiting swing arm 51, so that the limiting swing arm 51 and the connecting door panel 60 in the unfolding position can bear a large torque without excessive rotation relative to the shaft seat 40, and reduce the possibility that the limiting swing arm 51 excessively rotates and causes the rotation angle of the limiting swing arm 51 and the connecting door panel 60 to exceed the predetermined rotation angle. The total contact area of ​​the limiting zone formed between the shaft seat 40 and the limiting swing arm 51 refers to the sum of the contact areas of the individual limiting zones.

[0144] For some examples, see Fig.10 , Fig.14 and Fig.15 As shown, a convex portion 51d is provided at the end of the first arc plate 51c away from the slide seat 51b. Along the length direction Y of the shaft seat 40, at least one of the two opposite sides of the convex portion 51d is provided with a second stopper 512. There is a height difference between the second stopper 512 and the top surface of the convex portion 51d. The cover plate 42 has an avoidance hole 42a connected to the first arc groove 40b. The avoidance hole 42a avoids the convex portion 51d. When the rotating end 51a rotates relative to the shaft seat 40, the convex portion 51d is inserted into the avoidance hole 42a or withdraws from the avoidance hole 42a. The avoidance hole 42a on the cover plate 42 can prevent the convex portion 51d from interfering with the cover plate 42.

[0145] Exemplarily, along the length direction Y of the shaft seat 40 , a second stopper 512 is provided on one side of the protrusion 51 d .

[0146] For some examples, see Fig.16 As shown, the second receiving portion 421 has a second receiving plane 421a. The second receiving plane 421a is perpendicular to the thickness direction Z of the shaft seat 40. The second stop portion 512 has a second stop plane 512a. The second stop plane 512a is used to abut against the second receiving plane 421a. In the case where the second stop portion 512 and the second receiving portion 421 abut against each other, the second stop plane 512a can be perpendicular to the thickness direction Z of the shaft seat 40. In the case where the second stop portion 512 and the second receiving portion 421 abut against each other, the contact surface formed between the second stop plane 512a and the second receiving plane 421a is a plane, which is conducive to ensuring a good fitting contact state between the second stop portion 512 and the second receiving portion 421.

[0147] In some achievable ways, Fig.18 The structure of the connecting swing arm 52 is schematically shown. Figure 8 , Fig.13 and Fig.18 As shown, the connecting assembly 50 also includes a connecting swing arm 52. The connecting swing arm 52 connects the shaft seat 40 and the connecting door panel 60. Along the length direction Y of the shaft seat 40, the limiting swing arm 51 and the connecting swing arm 52 are arranged at intervals. One end of the connecting swing arm 52 is rotatably connected to the shaft seat 40, and the other end is rotatably connected to the connecting door panel 60. The folding device 30 also includes a supporting door panel 80. The supporting door panel 80 is arranged on the connecting swing arm 52. The supporting door panel 80 has a screen supporting surface 80a. The supporting door panel 80 is located between the shaft seat 40 and the connecting door panel 60.

[0148] When the connecting door panel 60 rotates relative to the shaft seat 40 to switch between the folded position and the unfolded position, one end of the connecting swing arm 52 rotates relative to the shaft seat 40, and the other end rotates relative to the connecting door panel 60. The supporting door panel 80 moves synchronously with the connecting swing arm 52.

[0149] The support door panel 80 is located between the connecting door panel 60 and the shaft seat 40, and can cover the gap between the connecting door panel 60 and the shaft seat 40. The support door panel 80 is not connected to the flexible display screen 20. The screen support surface 80a of the support door panel 80 can be used to provide support for the flexible display screen 20, reducing the possibility of the flexible display screen 20 being dented. Exemplarily, the support door panel 80 can be used to provide support for the bending portion 22 of the flexible display screen 20. For example, the support door panel 80 is arranged corresponding to the transition area 222 of the bending portion 22. The support door panel 80 can be used to provide support for the transition area 222 of the bending portion 22.

[0150] Exemplarily, the connecting swing arm 52 is located on the side of the supporting door panel 80 facing away from the flexible display screen 20. The limiting swing arm 51 is located on the side of the supporting door panel 80 facing away from the flexible display screen 20.

[0151] Exemplarily, the connecting swing arm 52 can serve as a main swing arm, and the limiting swing arm 51 can serve as a secondary swing arm.

[0152] In some examples, the limiting swing arm 51 has a third stopper 513. The shaft seat 40 has a third receiving portion 431. When the connecting door panel 60 and the limiting swing arm 51 are subjected to a force along the length direction Y of the shaft seat 40, after the third stopper 513 abuts against the third receiving portion 431, a limiting constraint can be formed on the connecting door panel 60 and the limiting swing arm 51 in the length direction Y of the shaft seat 40, thereby preventing the connecting door panel 60 and the supporting door panel 80 from relative movement along the length direction Y, and preventing the connecting door panel 60 from having a relatively large movement relative to the supporting door panel 80 along the length direction Y.

[0153] In some examples, Fig.19 for Fig.12 The cross-sectional structure along the S3-S3 direction. Fig.18 and Fig.19 As shown, the connecting swing arm 52 includes a second arc plate 521 and a third arc plate 522. The second arc plate 521 and the third arc plate 522 are connected. The shaft seat 40 is provided with a second arc groove 40c that is rotatably matched with the second arc plate 521. The connecting door plate 60 is provided with a third arc groove 60d that is rotatably matched with the third arc plate 522.

[0154] The second arc plate 521 of the connecting swing arm 52 is installed in the second arc groove 40c of the shaft seat 40, so that the connecting swing arm 52 is rotationally connected to the shaft seat 40 through the virtual axis structure. The third arc plate 522 of the connecting swing arm 52 is installed in the third arc groove 60d of the connecting door panel 60, so that the connecting swing arm 52 is rotationally connected to the connecting door panel 60 through the virtual axis structure. The two components are rotationally connected through the virtual axis structure, which means that the two components do not realize mutual rotation through a physical rotating shaft, but realize relative rotation around the rotation center through the structure of the arc plate and the arc groove.

[0155] The rotational connection between the connecting swing arm 52 and the shaft seat 40 is achieved through a virtual shaft structure, which is beneficial to reducing the design difficulty of the rotational connection structure between the connecting swing arm 52 and the shaft seat 40, and can reduce the overall thickness of the folding device 30, which is beneficial to making the folding device 30 lighter and thinner.

[0156] During the switching process of the connecting door panel 60 between the folded position and the unfolded position, the rotating end 51a of the limiting swing arm 51 rotates relative to the axle seat 40, and the sliding seat 51b of the limiting swing arm 51 slides relative to the connecting door panel 60. At the same time, the second arc plate 521 of the connecting swing arm 52 rotates relative to the axle seat 40, and the third arc plate 522 of the connecting swing arm 52 rotates relative to the connecting door panel 60.

[0157] In some achievable ways, Fig. 20 The structure of the synchronous transmission swing arm 53 is schematically shown. Figure 8 , Fig. 9 and Fig. 20 As shown, the connecting assembly 50 also includes a synchronous transmission swing arm 53. The synchronous transmission swing arm 53 includes a transmission part 531 and a sliding part 532. The transmission part 531 is rotatably connected to the shaft seat 40. The sliding part 532 is slidably connected to the connecting door panel 60. Along the length direction Y of the shaft seat 40, the limit swing arm 51 and the synchronous transmission swing arm 53 are spaced apart. The limit swing arm 51 and the connecting swing arm 52 are spaced apart. The limit swing arm 51 is arranged between the connecting swing arm 52 and the synchronous transmission swing arm 53. When the connecting door panel 60 rotates relative to the shaft seat 40, the transmission part 531 of the synchronous transmission swing arm 53 rotates relative to the shaft seat 40, and the sliding part 532 of the synchronous transmission swing arm 53 slides relative to the connecting door panel 60.

[0158] The transmission part 531 of the synchronous transmission swing arm 53 is rotatably connected to the shaft seat 40, and the sliding part 532 is slidably connected to the connecting door plate 60, forming a connecting rod slider structure. The second arc plate 521 of the connecting swing arm 52 is rotatably connected to the shaft seat 40, and the third arc plate 522 is rotatably connected to the connecting door plate 60, forming a connecting rod structure. The connecting door plate 60 is connected to the shaft seat 40 through the connecting rod slider structure and the connecting rod structure.

[0159] In some examples, the transmission part 531 of the synchronous transmission swing arm 53 has a meshing tooth portion 53a. Exemplarily, along the width direction X of the shaft seat 40, the shaft seat 40 is provided with connecting door panels 60 on both sides. The connecting door panels 60 on both sides of the shaft seat 40 are respectively connected to the synchronous transmission swing arm 53. The two synchronous transmission swing arms 53 corresponding to each other are meshed and transmitted through their respective meshing tooth portions 53a to ensure the rotation synchronization of the synchronous transmission swing arm 53, thereby ensuring the rotation synchronization of the two connecting door panels 60.

[0160] In the embodiment of the present application, the folding device 30 can jointly control the movement trajectory of the connected door panel 60 through the connecting swing arm 52 and the synchronous transmission swing arm 53, so that the connected door panel 60 can move close to the axle seat 40 when the connected door panel 60 switches from the unfolded position to the folded position, and can move away from the axle seat 40 when the connected door panel 60 switches from the folded position to the unfolded position.

[0161] When the connecting door panel 60 is switched from the folded position to the unfolded position, the connecting door panel 60 can move away from the shaft seat 40, which is conducive to stretching the flexible display screen 20, so that the bending portion 22 of the flexible display screen 20 remains flat and is not prone to bulging. When the connecting door panel 60 is switched from the unfolded position to the folded position, the connecting door panel 60 can move close to the shaft seat 40, which is conducive to reducing the tensile stress of the connecting door panel 60 on the flexible display screen 20, and reducing the possibility of deformation or structural damage of the flexible display screen 20 due to long-term large tensile stress.

[0162] Fig.21 for Fig.12 Cross-sectional structure along S4-S4 direction. Fig. 22 for Fig.12 The cross-sectional structure along the S5-S5 direction. Fig.18 , Fig.21 and Fig. 22As shown, the connecting swing arm 52 also includes a first stop boss 523 and a second stop boss 524. Along the length direction Y of the shaft seat 40, at least one side of the second arc plate 521 is provided with the first stop boss 523. At least one side of the third arc plate 522 is provided with the second stop boss 524. The cover plate 42 has a fifth receiving portion 422. The fifth receiving portion 422 is used to abut and cooperate with the first stop boss 523. The connecting door panel 60 has a sixth receiving portion 60b. The sixth receiving portion 60b is used to abut and cooperate with the second stop boss 524.

[0163] In some examples, when the connecting door panel 60 is in the extended position, the first stopping boss 523 may abut against the fifth receiving portion 422 , and the second stopping boss 524 may abut against the sixth receiving portion 60 b .

[0164] The first stop boss 523 and the fifth receiving portion 422 can form a limit zone, while the second stop boss 524 and the sixth receiving portion 60b can form a limit zone. Therefore, the connecting swing arm 52 can also play a role of limiting the connecting door panel 60, so that the connecting door panel 60 in the unfolded position can bear a large torque without excessive rotation relative to the shaft seat 40, and can also prevent the second curved plate 521 from escaping from the second curved groove 40c of the shaft seat 40, and prevent the third curved plate 522 from escaping from the third curved groove 60d of the connecting door panel 60.

[0165] In some examples, when the connecting door panel 60 is in the unfolded position, the first stop portion 511 of the limiting swing arm 51 abuts against the first receiving portion 411, and the second stop portion 512 abuts against the second receiving portion 421. There is a gap between the first stop boss 523 and the fifth receiving portion 422, and there is a gap between the second stop boss 524 and the sixth receiving portion 60b. When the torque carried by the connecting door panel 60 further increases, the first stop boss 523 abuts against the fifth receiving portion 422, and the second stop boss 524 abuts against the sixth receiving portion 60b, so that the connecting swing arm 52 also plays a limiting role, which is conducive to reducing the possibility of excessive rotation of the connecting door panel 60 relative to the shaft seat 40 due to the large torque.

[0166] Therefore, the limiting swing arm 51 and the connecting swing arm 52 can jointly play the role of limiting and restraining the connecting door panel 60, so that the connecting door panel 60 in the expanded position can bear a larger torque without excessive rotation relative to the axle seat 40, further reducing the possibility of excessive rotation of the connecting door panel 60 causing the rotation angle of the connecting door panel 60 to exceed the predetermined rotation angle.

[0167] In some examples, the shaft seat 40 has a first arc-shaped limit groove 40d. The first arc-shaped limit groove 40d is connected to the second arc-shaped limit groove 40c. Along the length direction Y of the shaft seat 40, the first stop boss 523 is inserted into the first arc-shaped limit groove 40d. The first stop boss 523 and the first arc-shaped limit groove 40d are rotatably matched. Along the width direction X of the shaft seat 40, the wall surface of the cover plate 42 facing the first arc-shaped limit groove 40d forms a fifth receiving portion 422.

[0168] When the connecting door panel 60 switches from the folded position to the unfolded position, the second arc plate 521 rotates in the second arc groove 40c, and at the same time, the second arc plate 521 drives the first stop boss 523 to rotate in the first arc limit groove 40d, and the first stop boss 523 moves close to the fifth receiving portion 422.

[0169] During the process of switching the connecting door panel 60 from the unfolded position to the folded position, the second arc plate 521 rotates in the second arc groove 40c, and at the same time, the second arc plate 521 drives the first stop boss 523 to rotate in the first arc limit groove 40d, so that the first stop boss 523 breaks away from contact with the fifth supporting portion 422 and moves away from the fifth supporting portion 422.

[0170] In some examples, the connecting door panel 60 has a second arc-shaped limit groove 60c. The second arc-shaped limit groove 60c is connected to the third arc-shaped limit groove 60d. Along the length direction Y of the shaft seat 40, the second stop boss 524 is inserted into the second arc-shaped limit groove 60c. The second stop boss 524 is rotatably matched with the second arc-shaped limit groove 60c. The wall surface of the connecting door panel 60 facing the second arc-shaped limit groove 60c forms a sixth receiving portion 60b.

[0171] During the switching of the connecting door panel 60 from the folded position to the unfolded position, the third arc plate 522 rotates in the third arc groove 60d, and at the same time, the third arc plate 522 drives the second stop boss 524 to rotate in the second arc limit groove 60c, and the second stop boss 524 moves close to the sixth receiving portion 60b.

[0172] During the process of switching the connecting door panel 60 from the unfolded position to the folded position, the third arc plate 522 rotates in the third arc groove 60d, and at the same time, the third arc plate 522 drives the second stop boss 524 to rotate in the second arc limit groove 60c, so that the second stop boss 524 breaks away from contact with the sixth supporting portion 60b and moves away from the sixth supporting portion 60b.

[0173] In some examples, along the length direction Y of the shaft seat 40, there may be a gap between the first stop boss 523 and the wall surface of the shaft seat 40 facing the first arc-shaped limiting groove 40d, so that there is a clearance between the first stop boss 523 and the shaft seat 40. Along the length direction Y of the shaft seat 40, there may be a gap between the second stop boss 524 and the wall surface of the connecting door panel 60 facing the second arc-shaped limiting groove 60c, so that there is a clearance between the second stop boss 524 and the shaft seat 40.

[0174] When the connecting door panel 60 and the limiting swing arm 51 are subjected to the force in the length direction Y of the shaft seat 40, after the third stopper 513 abuts against the third receiving portion 431, a limiting constraint can be formed on the connecting door panel 60 and the limiting swing arm 51 in the length direction Y of the shaft seat 40. When the force in the length direction Y of the shaft seat 40 is further increased, the connecting swing arm 52 is displaced in the length direction Y to reduce the distance between the first stopper boss 523 and the shaft seat 40. After the first stopper boss 523 contacts and abuts against the wall surface of the shaft seat 40 facing the first arc-shaped limiting groove 40d, the connecting swing arm 52 is subjected to the limiting constraint of the shaft seat 40 and no longer displaces in the length direction Y. After the first stopper boss 523 abuts against the shaft seat 40, a limiting constraint can be formed on the connecting door panel 60 and the connecting swing arm 52 in the length direction Y of the shaft seat 40. Alternatively, when the force applied to the connecting door panel 60 along the length direction Y of the shaft seat 40 further increases, the connecting swing arm 52 is displaced along the length direction Y to reduce the distance between the second stop boss 524 and the connecting door panel 60. After the second stop boss 524 contacts and abuts against the wall surface of the connecting door panel 60 facing the second arc-shaped limiting groove 60c, the connecting door panel 60 is limited by the connecting swing arm 52 and no longer displaces relative to the connecting swing arm 52 along the length direction Y.

[0175] Therefore, the limiting swing arm 51 and the connecting swing arm 52 can jointly form a limiting constraint on the connecting door panel 60, preventing the connecting door panel 60 and the connecting swing arm 52 from having relative movement along the length direction Y, and at the same time preventing the connecting door panel 60 from having a relatively large movement relative to the axle seat 40 along the length direction Y.

[0176] The connecting door plate 60 and the shaft seat 40 are both connected to the flexible display screen 20. When the connecting door plate 60 and the shaft seat 40 move relative to each other along the length direction Y, and the connecting door plate 60 moves relatively much along the length direction Y, the connecting door plate 60 will apply a tensile force along the length direction Y to a part of the flexible display screen 20, resulting in stress concentration on the flexible display screen 20, and there is a possibility that the flexible display screen 20 is pulled by the connecting door plate 60 and damaged. In the embodiment of the present application, a limiting area can be formed between the connecting swing arm 52 and the shaft seat 40 by the first stop boss 523 and the second stop boss 524, so as to further effectively reduce the possibility of the above-mentioned problem.

[0177] In some examples, a first stop boss 523 is disposed on one side of the second curved plate 521. A second stop boss 524 is disposed on one side of the third curved plate 522. Along the length direction Y of the shaft seat 40, the first stop boss 523 is disposed on the end surface of the second curved plate 521 facing away from the third curved plate 522, and the second stop boss 524 is disposed on the end surface of the third curved plate 522 facing away from the second curved plate 521.

[0178] In some examples, the first stop boss 523, the second arc plate 521, the second stop boss 524 and the third arc plate 522 are an integrally formed structure. The connecting swing arm 52 is an integrally formed structure.

[0179] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0180] The embodiments of the present application do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise precisely and specifically specified.

[0181] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, systems, products or devices.

[0182] The term "plurality" in this article refers to two or more than two. The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the previous and next associated objects are in an "or" relationship; in a formula, the character " / " indicates that the previous and next associated objects are in a "division" relationship.

[0183] It is understood that the various numerical numbers involved in the embodiments of the present application are only for the convenience of description and are not used to limit the scope of the embodiments of the present application. It is understood that in the embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Claims

1. A folding device for carrying a flexible display screen, characterized in that: The folding device comprises: An axle seat, a connecting assembly and a connecting door panel, wherein the connecting assembly connects the axle seat and the connecting door panel, and the connecting door panel has a first screen connecting surface; The shaft seat comprises a base and a cover plate, and the base and the cover plate are stacked along the thickness direction of the shaft seat, and the base has a second screen connection surface facing away from the cover plate; The connecting assembly includes a limit swing arm, the limit swing arm includes a rotating end and a sliding seat, the rotating end is rotatably connected to the shaft seat, and the sliding seat is slidably connected to the connecting door panel, the limit swing arm also includes a first stop portion, along the width direction of the shaft seat, the base is provided with a first receiving portion, the first receiving portion is used to abut and cooperate with the first stopping portion, the limit swing arm also includes a second stopping portion, the second stopping portion is provided at the rotating end, along the thickness direction, the cover plate is provided with a second receiving portion facing the base, the second receiving portion is used to abut and cooperate with the second stopping portion; Wherein, the connecting door panel rotates relative to the axle seat to switch between the folded position and the unfolded position, the rotating end rotates relative to the axle seat, and the sliding seat slides relative to the connecting door panel. When the connecting door panel is in the unfolded position, the first stop portion abuts against the first receiving portion, and the second stop portion abuts against the second receiving portion.

2. The folding device according to claim 1, characterized in that: The first stopper is a protrusion disposed on a surface of the slide seat facing away from the cover plate.

3. The folding device according to claim 2, characterized in that: The first receiving portion has a first receiving plane, the first receiving plane is perpendicular to the width direction, and the first stopping portion has a first stopping plane, the first stopping plane is used to abut against the first receiving plane.

4. The folding device according to claim 2 or 3, characterized in that: The shaft seat also includes a positioning block, which is arranged on the base. Along the length direction of the shaft seat, the positioning blocks are respectively arranged on both sides of the first stop part, and along the length direction, the third stop part is arranged on the opposite sides of the first stop part, and the positioning block has a third receiving part, and the third receiving part is used to abut and cooperate with the third stop part.

5. The folding device according to claim 4, characterized in that: The third receiving portion has a third receiving plane, and the third receiving plane is perpendicular to the length direction. The third stopping portion has a third stopping plane, and the third stopping plane is used to abut against the third receiving plane.

6. The folding device according to claim 5, characterized in that: Along the length direction, the distance between the two third supporting planes is greater than the distance between the two third stopping planes.

7. The folding device according to claim 4, characterized in that: The sliding seat has an avoidance gap, and the avoidance gap avoids the positioning block. When the rotating end rotates relative to the shaft seat, the positioning block is inserted into the avoidance gap or withdraws from the avoidance gap.

8. The folding device according to any one of claims 1 to 3 and 5 to 7, characterized in that: The rotating end includes a first arc-shaped plate, the shaft seat is provided with a first arc-shaped groove rotatably matched with the first arc-shaped plate, and along the width direction, the second stop portion is provided at the end of the first arc-shaped plate away from the sliding seat.

9. The folding device according to claim 8, characterized in that: A convex portion is provided at the end of the first arc plate away from the sliding seat, and the second stop portion is provided on at least one of the two opposite sides of the convex portion along the length direction of the shaft seat, and the cover plate has a avoidance hole connected to the first arc groove, and the avoidance hole avoids the convex portion, and when the rotating end rotates relative to the shaft seat, the convex portion is inserted into the avoidance hole or exits the avoidance hole.

10. The folding device according to claim 8, characterized in that: The second receiving portion has a second receiving plane, the second receiving plane is perpendicular to the thickness direction, and the second stopping portion has a second stopping plane, the second stopping plane is used to abut against the second receiving plane.

11. The folding device according to any one of claims 1 to 3, 5 to 7, 9 and 10, characterized in that: Along the thickness direction, the base is provided with a fourth supporting portion facing the cover plate, and the limiting swing arm includes a fourth stop portion, and the fourth stop portion is provided on the sliding seat. The fourth stop portion is used to abut and cooperate with the fourth supporting portion, and when the connecting door panel is in the expanded position, the fourth stop portion abuts against the fourth supporting portion.

12. The folding device according to claim 11, characterized in that: The fourth receiving portion has a fourth receiving plane, and the fourth receiving plane is perpendicular to the thickness direction. The fourth stopping portion has a fourth stopping plane, and the fourth stopping plane is used to abut against the fourth receiving plane.

13. The folding device according to any one of claims 1 to 3, 5 to 7, 9, 10 and 12, characterized in that: The connecting assembly also includes a connecting swing arm. Along the length direction of the axle seat, the limiting swing arm and the connecting swing arm are spaced apart. One end of the connecting swing arm can be rotatably connected to the axle seat, and the other end can be rotatably connected to the connecting door panel. The folding device also includes a supporting door panel, which is arranged on the connecting swing arm. The supporting door panel has a screen supporting surface, and the supporting door panel is located between the axle seat and the connecting door panel.

14. The folding device according to claim 13, characterized in that: The connecting swing arm includes a second arc plate, a first stop boss, a third arc plate and a second stop boss, the second arc plate and the third arc plate are connected, the shaft seat is provided with a second arc groove which is rotatably matched with the second arc plate, and the connecting door plate is provided with a third arc groove which is rotatably matched with the third arc plate, along the length direction, the first stop boss is provided on at least one side of the second arc plate, and the second stop boss is provided on at least one side of the third arc plate, the cover plate has a fifth receiving portion, and the fifth receiving portion is used to abut and cooperate with the first stop boss, and the connecting door plate has a sixth receiving portion, and the sixth receiving portion is used to abut and cooperate with the second stop boss, and when the connecting door plate is in the expanded position, the first stop boss abuts against the fifth receiving portion, and the second stop boss abuts against the sixth receiving portion.

15. The folding device according to claim 14, characterized in that: The shaft seat has a first arc-shaped limit groove, which is connected to the second arc-shaped limit groove. Along the length direction, the first stop boss is inserted into the first arc-shaped limit groove. The first stop boss and the first arc-shaped limit groove can be rotatably matched. Along the width direction, the cover plate faces the wall of the first arc-shaped limit groove to form the fifth receiving portion.

16. The folding device according to claim 14 or 15, characterized in that: The connecting door panel has a second arc-shaped limit groove, which is connected to the third arc-shaped limit groove. Along the length direction, the second stop boss is inserted into the second arc-shaped limit groove. The second stop boss and the second arc-shaped limit groove can be rotatably matched, and the wall surface of the connecting door panel facing the second arc-shaped limit groove forms the sixth supporting part.

17. The folding device according to any one of claims 1 to 3, 5 to 7, 9, 10, 12, 14 and 15, characterized in that: The connecting component also includes a synchronous transmission swing arm, which includes a transmission part and a sliding part. The transmission part can be rotatably connected to the shaft seat, and the sliding part can be slidably connected to the connecting door panel. Along the length direction of the shaft seat, the limiting swing arm and the synchronous transmission swing arm are spaced apart. When the connecting door panel rotates relative to the shaft seat, the transmission part rotates relative to the shaft seat, and the sliding part slides relative to the connecting door panel.

18. An electronic device, characterized in that: include: A folding device as claimed in any one of claims 1 to 17; A screen support body connected to the connecting door panel; A flexible display screen, comprising a non-bending portion and a bending portion, wherein along the width direction of the shaft seat, the bending portion is located between two non-bending portions, the shaft seat and the connecting assembly are located below the bending portion, the non-bending portion is connected to the screen support body, the first screen connecting surface is connected to the non-bending portion, and the second screen connecting surface is connected to the bending portion; When the screen support body is in a folded state, the screen support body is located between the two non-bending portions.

19. The electronic device according to claim 18, characterized in that: The bending portion includes a middle area and a transition area. Along the width direction, the middle area is located between the two transition areas. The middle area is connected to the second screen connecting surface, and the transition area is connected to the non-bending portion.

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