Folding device and electronic equipment

Abstract

The invention provides a folding device which comprises a back shell, a base, a linkage mechanism and an adjusting piece, and the back shell is provided with a containing part; the base is positioned on the back shell, the linkage mechanism comprises a rotating shaft and a driving piece, the rotating shaft is rotationally connected to the base, and the driving piece can rotate along with the rotating shaft; the adjusting part is contained in the containing part, the driving part is connected to the adjusting part, and the driving part is used for driving the adjusting part to slide relative to the back shell so as to adjust the shape of the flexible circuit board connected to the adjusting part; when the folding device is in a flattened state, the adjusting piece is positioned at a first position relative to the back shell, so that the first redundant part of the flexible circuit board is accommodated in the accommodating part; when the folding device is in a folded state, the adjusting piece is positioned at a second position relative to the back shell, so that the first redundant part is in a flattened state. The invention further provides the electronic equipment provided with the folding device.

Description

Technical Field

[0001] The present invention relates to the field of electronic devices, and particularly to a folding device for supporting a flexible screen and an electronic device provided with the folding device. Background Art

[0002] At present, folding electronic products with bendable flexible display screens are becoming increasingly popular among people. The folding electronic products in the prior art generally include a hinge mechanism and two frames respectively disposed on opposite sides of the hinge mechanism. Electronic devices are provided in the frames. In order to realize the electrical connection of the electronic devices in the two frames, an FPC generally passes through the hinge mechanism; when the folding electronic product is bent from the flattened state to the folded state, the relative rotation of the two frames will stretch the FPC; when the folding electronic product is unfolded from the folded state to the flattened state, the mutual separation and rotation of the two frames will cause the FPC to form a redundant section. The existing folding electronic products are provided with a redundant space between the frame and the hinge mechanism for accommodating the redundant section of the FPC. However, with the development of the folding electronic products towards being thinner and lighter, the redundant space of the folding electronic products becomes smaller and smaller, resulting in the problem that the redundant section of the FPC cannot be completely accommodated, which affects the folding or unfolding of the folding electronic products. Summary of the Invention

[0003] The present application provides a folding device and an electronic device provided with the folding device.

[0004] A folding device provided by the present application includes a back shell, a base, a linkage mechanism and an adjusting member. The back shell is provided with a receiving portion; the base is positioned on the back shell. The linkage mechanism includes a rotating shaft and a driving member connected to the rotating shaft. The rotating shaft is rotatably connected to the base, and the driving member can rotate together with the rotating shaft; the adjusting member is accommodated in the receiving portion, and the driving member is connected to the adjusting member. The driving member is used to drive the adjusting member to slide relative to the back shell to adjust the shape of a flexible circuit board connected to the adjusting member; when the folding device is in the flattened state, the adjusting member is positioned at a first position relative to the back shell, so that a first redundant portion of the flexible circuit board is received in the receiving portion; when the folding device is in the folded state, the adjusting member is positioned at a second position relative to the back shell, so that the first redundant portion of the flexible circuit board is in a flattened state.

[0005] The present application also provides an electronic device, which includes a folding device, a flexible circuit board, a flexible screen, and two frames. The two frames are respectively connected to opposite sides of the folding device. The folding device includes a back shell, a base, a linkage mechanism, and an adjusting member. The back shell is provided with a receiving portion; the base is positioned in the back shell. The linkage mechanism includes a rotating shaft and a driving member connected to the rotating shaft. The rotating shaft is rotatably connected to the base, and the driving member can rotate together with the rotating shaft; the adjusting member is accommodated in the receiving portion, and the driving member is connected to the adjusting member. The driving member is used to drive the adjusting member to slide relative to the back shell to adjust the shape of the flexible circuit board connected to the adjusting member; when the folding device is in a flattened state, the adjusting member is positioned at a first position relative to the back shell, so that a first redundant portion of the flexible circuit board is received in the receiving portion; when the folding device is in a folded state, the adjusting member is positioned at a second position relative to the back shell, so that the first redundant portion of the flexible circuit board is in a flattened state; the flexible screen is disposed on the two frames and the folding device, and the flexible circuit board is connected to the adjusting member of the folding device.

[0006] The rotation of the driving member of the folding device of the electronic device of the present application drives the adjusting member to slide relative to the back shell, so that part of the redundancy of the flexible circuit board is in the receiving portion, which can effectively solve the problem that the redundant section of the flexible circuit board cannot be completely received in the prior art; the driving member rotates with the rotating shaft to drive the adjusting member to slide relative to the back shell to a side away from the receiving portion, so that the flexible circuit board is flattened, which can make the folding or unfolding of the electronic device smooth and improve the user experience. Description of the Drawings

[0007] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0008] Figure 1 is a three-dimensional structural schematic diagram of the electronic device in an embodiment of the present application;

[0009] Figure 2 is Figure 1 a three-dimensional structural exploded schematic diagram of the electronic device in;

[0010] Figure 3 is Figure 2 a further three-dimensional structural exploded schematic diagram of the electronic device in;

[0011] Figure 4 is Figure 3Schematic enlarged three-dimensional structure of the folding device therein;

[0012] Figure 5 is Figure 4 Schematic three-dimensional structure of another perspective of the folding device therein;

[0013] Figure 6 is Figure 4 Schematic exploded three-dimensional structure of the folding device therein;

[0014] Figure 7 is Figure 6 Schematic of further exploded three-dimensional structure of the folding device therein;

[0015] Figure 8 is Figure 7 Schematic three-dimensional structure of another perspective of the folding device therein;

[0016] Figure 9 is Figure 7 Schematic of further exploded three-dimensional structure of the folding device therein;

[0017] Figure 10 is Figure 8 Schematic of further exploded three-dimensional structure of the folding device therein;

[0018] Figure 11 is Figure 9 Schematic exploded three-dimensional structure of the storage member, flexible circuit board and support member therein;

[0019] Figure 12 is Figure 10 Schematic exploded three-dimensional structure of the storage member, flexible circuit board and support member therein;

[0020] Figure 13 is Figure 9 Schematic exploded three-dimensional structure of one of the assisting folding components therein;

[0021] Figure 14 is Figure 13 Schematic exploded three-dimensional structure of the base and rotating mechanism therein;

[0022] Figure 15 is Figure 14 Schematic three-dimensional structure of another perspective of the base and rotating mechanism therein;

[0023] Figure 16 is Figure 13 Schematic enlarged three-dimensional structure of the linkage mechanism and limiting mechanism therein;

[0024] Figure 17 is Figure 16 Schematic three-dimensional structure of another perspective of the linkage mechanism and limiting mechanism therein;

[0025] Figure 18 is Figure 16 a schematic exploded perspective view of the linkage mechanism and the limiting mechanism in

[0026] Figure 19 is Figure 18 a schematic perspective view of another angle of the linkage mechanism and the limiting mechanism in

[0027] Figure 20 is Figure 2 one of the schematic perspective sectional views of the folding housing in

[0028] Figure 21 is Figure 2 another schematic perspective sectional view of the folding housing in

[0029] Figure 22 is Figure 2 yet another schematic perspective sectional view of the folding housing in

[0030] Figure 23 is Figure 22 a sectional view of the folding housing in

[0031] Figure 24 is Figure 2 still another schematic perspective sectional view of the folding housing in

[0032] Figure 25 is Figure 1 a schematic perspective view of the folded state of the electronic device in

[0033] Figure 26 is Figure 25 a schematic perspective view of the folding device in

[0034] Figure 27 is Figure 26 a schematic perspective view of another angle of the folding device in

[0035] Figure 28 is Figure 25 one of the schematic perspective sectional views of the electronic device in

[0036] Figure 29 is Figure 25 another schematic perspective sectional view of the electronic device in

[0037] Figure 30 is Figure 25 yet another schematic perspective sectional view of the electronic device in

[0038] Figure 31 is Figure 25 still another schematic perspective sectional view of the electronic device in

[0039] Main reference numerals description:

[0040] 100, Electronic device; 20, Folding housing; 21, Frame; 210, First storage space; 211, First front; 212, First back; 214, Side; 215, End face; 216, Mounting groove; 217, Mounting part; 218, Positioning groove; 30, Flexible screen; 31, Bendable area; 33, Non-bendable area; 400, Flexible circuit board; 401, First redundant part; 404, Second redundant part; 406, Fixing part; 407, Positioning part; 50, Folding device; 51, Folding assistance component; 52, Support mechanism; 521, Middle support part; 5212, Connection hole; 523, Side support part; 5230, Support plate; 5232, Connection area; 5233, First connection part; 5234, Rotation groove; 5236, Second connection part; 5237, Adjustment groove; 5237a, First positioning section; 5237b, Second positioning section; 53, Base; 531, First housing; 532, Arc groove; 530, Receiving groove; 5312, Positioning post; 5314, First receiving groove; 533, Mounting hole; 534, Second housing; 5342, Positioning hole; 5344, Second receiving groove; 535, First shaft hole; 536, Connection hole; 537, Fixing hole; 54, Adjusting part; 540, Adjustment groove; 5401, First positioning section; 5403, Second positioning section; 5404, Guide sliding hole; 5605, Second positioning hole; 5607, Fourth anti-sliding part; 542, Fixing plate; 544, Adjusting bar; 546, Fixing groove; 547, Adhesive part; 55, Rotating mechanism; 550, Rotating part; 551, Rotating shaft; 552, First rotating part; 5522, Arc track; 553, Second rotating part; 5531, Lug; 5533, First connecting cylinder; 555, Connecting part; 5550, Guide sliding groove; 5552, Receiving groove; 5553, Second connecting cylinder; 5554, Avoidance groove; 5556, Rotating track; 56, Linkage mechanism; 560, Driving part; 5601, Driving shaft; 5603, Connection part; 561, Rotating shaft; 5610, Shaft body; 5612, Connection cap; 5613, Positioning part; 5616, Card slot; 562, Link member; 5620, Guide sliding rail; 5621, Avoidance groove; 5622, Sleeve; 5623, Link; 5624, Second shaft hole; 5626, First limiting surface; 5627, Second limiting surface; 5628, Adjusting shaft; 564, Gear combination; 5641, Driving gear; 5643, Synchronous gear; 5644, Rotating shaft; 5646, Gear ring; 565, Fixing part; 5652, First guide sliding hole; 5654, First connection hole; 5656, Positioning part; 5657, Positioning rod; 57, Limiting mechanism; 572, Pushing part; 5720, Cam; 5724, First protruding part; 5725, First recessed part; 573, Holding part; 5730, First sliding cylinder; 5731, Pushing cam; 5732, Connection bar; 5734, Second protruding part; 5735, Second recessed part;5736, second connecting hole; 575, elastic member; 576, abutting member; 5760, second sliding cylinder; 5763, positioning portion; 5765, second guide sliding hole; 5767, avoidance hole; 5768, first anti-slip portion; 577, friction assembly; 5770, friction member; 5772, first positioning hole; 5774, second anti-slip portion; 578, gasket; 5782, through hole; 578 4. The third anti-slip part; 579. Buckle; 58. Support member; 580. The second storage space; 582. Support bar; 5821. Support groove; 584. Connecting piece; 5842. Connecting hole; 59. Back shell; 590. Accommodating part; 591. Guide column; 592. Back plate; 594. Side wall; 5941. Wire groove; 595. Connecting part; 596. Connecting column; 5964. Connecting hole. ; DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] In addition, the description of each embodiment below is with reference to the attached diagrams to illustrate specific embodiments that the present application can be implemented. The directional terms mentioned in the present application, such as "upper", "lower", "front", "back", "left", "right", "inner", "outer", "side", etc., are only with reference to the directions of the attached figures. Therefore, the directional terms used are for better and clearer explanation and understanding of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set on..." should be understood in a broad sense, for example, it can be a fixed connection, or it can be detachably connected, or connected in one piece; it can be a mechanical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0043] Please also read Figures 1 to 10, an electronic device 100 in an embodiment of the present invention includes a folding housing 20 and a flexible screen 30. The flexible screen 30 is disposed on the folding housing 20. The folding housing 20 includes two frame bodies 21 and a folding device 50. The folding device 50 is located between the two frame bodies 21, and the two frame bodies 21 are respectively connected to opposite sides of the folding device 50. The flexible screen 30 includes a bendable area 31 facing the front of the folding device 50, and two non-bendable areas 33 connected to opposite sides of the bendable area 31. The two non-bendable areas 33 are respectively connected to the fronts of the two frame bodies 21. The folding device 50 is used to support the bendable area 31 of the flexible screen 30. The folding device 50 includes a folding assist component 51, a support mechanism 52, and a back shell 59. The support mechanism 52 is connected to the front of the folding assist component 51, and the back shell 59 is connected to the back of the folding assist component 51; the folding assist component 51 includes a base 53, an adjusting member 54, a rotating mechanism 55, a linkage mechanism 56, and a limiting mechanism 57; a receiving portion 590 is provided on the front of the back shell 59. The base 53 is received in the receiving portion 590 and is positioned on the back shell 59. The linkage mechanism 56 includes a rotating shaft 561 and a driving member 560 connected to the rotating shaft 561. The rotating shaft 561 is rotatably connected to the base 53, and the driving member 560 can rotate together with the rotating shaft 561; the adjusting member 54 is received in the receiving portion 590, and the driving member 560 is connected to the adjusting member 54. The driving member 560 can drive the adjusting member 54 to slide relative to the back shell 59 to adjust the shape of a flexible circuit board 400 connected to the adjusting member 54. That is, the sliding of the adjusting member 54 relative to the back shell 59 can cause the flexible circuit board 400 to bend into or flatten out of the receiving portion 590; the flexible circuit board 400 is connected to the adjusting member 54 of the folding device 50. The flexible circuit board 400 can be located between the support mechanism 52 and the adjusting member 54, or between the back shell 59 and the adjusting member 54; in this embodiment, the flexible circuit board 400 passes through between the support mechanism 52 and the adjusting member 54.

[0044] The housing 21 is provided with electronic components such as a circuit board and a battery. The flexible circuit board 400 is used to electrically connect the electronic components in two housings. When the folding device 50 is in a flattened state, the adjusting member 54 is positioned at the first position relative to the back shell 59, so that the first redundant portion 401 of the flexible circuit board 400 is received in the accommodating portion 590, that is, the portion of the flexible circuit board 400 corresponding to the accommodating portion 590 is received in the accommodating portion 590; when the folding device 50 is in a folded state, the adjusting member 54 is positioned at the second position relative to the back shell 59, so that the first redundant portion 401 of the flexible circuit board 400 is in a flattened state, that is, the portion of the flexible circuit board 400 corresponding to the accommodating portion 590 is in a flattened state. During the process that the electronic device 100 is folded from the flattened state to the folded state through the folding device 50, the driving member 560 rotates relative to the base 53 about the axis of the rotating shaft 561 in the first rotation direction along with the rotating shaft 561, so as to drive the adjusting member 54 to slide relative to the back shell 59 in the first direction, so that the first redundant portion 401 of the flexible circuit board 400 changes from the redundant state to the flattened state; during the process that the electronic device 100 is unfolded from the folded state to the flattened state through the folding device 50, the driving member 560 rotates relative to the base 53 about the axis of the rotating shaft 561 in the second rotation direction along with the rotating shaft 561, so as to drive the adjusting member 54 to slide relative to the back shell 59 in the second direction, so that the first redundant portion 401 of the flexible circuit board 400 changes from the flattened state to the redundant state. The first rotation direction is opposite to the second rotation direction, and the first direction is opposite to the second direction.

[0045] It should be noted that the front side refers to the side with the same light-emitting surface orientation as the flexible screen 30, the back side refers to the side with the light-emitting surface orientation opposite to that of the flexible screen 30, and the specific angle refers to the included angle between the front sides of the two housings 21 within the range of 0 degrees to 180 degrees. The electronic device 100 is, for example, but not limited to, a mobile phone, a tablet computer, a display, a liquid crystal panel, an OLED panel, a television, a smart watch, a VR head-mounted display, a vehicle-mounted display, and other products and components with any display function. The "connection" in the description of the embodiments of the present invention includes both direct connection and indirect connection. For example, the connection between A and B includes direct connection between A and B or connection through a third element C or more other elements. The connection also includes two cases of integrated connection and non-integrated connection. The integrated connection means that A and B are integrally formed and connected, and the non-integrated connection means that A and B are non-integrally formed and connected.

[0046] During the unfolding process of the electronic device 100 of the present invention, the driving member 560 of the folding device 50 rotates in the second rotation direction to drive the adjusting member 54 to slide relative to the back shell 59 in the second direction, so that the first redundant portion 401 of the flexible circuit board 400 is bent and received in the receiving portion 590, effectively solving the problem in the prior art that the redundant segment of the flexible circuit board cannot be completely accommodated; the driving member 560 rotates in the first rotation direction to drive the adjusting member 54 to slide relative to the back shell 59 in the first direction, so that the first redundant portion 401 of the flexible circuit board 400 is flattened, enabling the folding or unfolding of the electronic device 100 to be smooth and improving the user experience.

[0047] The frame 21 includes a first front surface 211, a first back surface 212, opposite side surfaces 214 and opposite end surfaces 215. An installation groove 216 is provided on one side of the first front surface 211 close to the folding device 50. The opposite ends of the installation groove 216 respectively extend to be close to the two side surfaces 214, and one side of the installation groove 216 penetrates through the end surface 215 facing the folding device 50; the frame 21 is respectively provided with installation portions 217 at the opposite ends of the installation groove 216, and the frame 21 is provided with a storage groove 210 at the bottom surface of the installation groove 216. When the two frames 21 are in a flattened state, the storage groove 210 stores the second redundant portion 404 of the flexible circuit board 400. Optionally, the frame 21 is further provided with a positioning groove 218 communicating with the storage groove 210. Specifically, the positioning groove 218 is located on the bottom surface of the installation groove 216 on the side of the storage groove 210 away from the back shell 59, and the positioning groove 218 communicates with the storage groove 210 and the inner cavity of the frame 21.

[0048] The folding assistance assembly 51 includes two rotating mechanisms 55 which are respectively arranged on two opposite sides of the base 53. Each rotating mechanism 55 includes a rotating member 550 and a connecting member 555 rotatably connected to the rotating member 550. One end of the rotating member 550 of one rotating mechanism 55, which is far from the connecting member 555, is rotatably connected to one side of the base 53, and one end of the rotating member 550 of the other rotating mechanism 55, which is far from the connecting member 555, is rotatably connected to the opposite side of the base 53. The linkage mechanism 56 includes two rotating shafts 561, two connecting rod members 562 and a gear combination 564. Each rotating shaft 561 is connected with a driving member 560. Each driving member 560 includes a driving shaft 5601, and the axis of the driving shaft 5601 is parallel to the axis of the rotating shaft 561. The two rotating shafts 561 are respectively rotatably connected to two sides of one end of the base 53. One connecting rod member 562 is connected to one rotating shaft 561, and the other connecting rod member 562 is connected to the other rotating shaft 561. The gear combination 564 is arranged between the two connecting rod members 562. The two connecting rod members 562 are synchronously rotated through the gear combination 564 to be folded or unfolded with each other. At least one folding assistance assembly 51 is arranged on the back surface of the support mechanism 52. In this embodiment, folding assistance assemblies 51 are respectively arranged at two opposite ends of the back surface of the support mechanism 52. In other embodiments, more than three folding assistance assemblies 51 are arranged on the back surface of the support mechanism 52, and the more than three folding assistance assemblies 51 are arranged along the length direction of the support mechanism 52.

[0049] As Figures 7 - 12 shown, the driving member 560 and the adjusting member 54 are connected through the cooperation of an adjusting shaft and an adjusting groove. The adjusting shaft is arranged on one of the driving member 560 and the adjusting member 54, and the adjusting groove is arranged on the other of the driving member 560 and the adjusting member 54. The axis of the adjusting shaft is parallel and spaced from the axis of the rotating shaft 561. In this embodiment, the driving member 560 includes a driving shaft 5601, and the axis of the driving shaft 5601 is spaced and parallel to the axis of the rotating shaft 561. The adjusting member 54 is provided with an adjusting groove 540. The driving shaft 5601 can slide and rotate in the adjusting groove 540, so that the adjusting member 54 slides relative to the back shell 59 along the first direction to drive the first redundant part 401 of the flexible circuit board 400 to bend into the accommodating part 590, or the adjusting member 54 slides relative to the back shell 59 along the second direction to drive the flexible circuit board 400 to move away from the accommodating part 590, so that the first redundant part 401 is flattened. Optionally, the driving member 560 further includes a connecting part 5603 fixedly connected to the rotating shaft 561. One end of the driving shaft 5601 is connected to the connecting part 5603. The driving shaft 5601 is far from the rotating shaft 561, and the axis of the driving shaft 5601 is parallel and spaced from the axis of the rotating shaft 561. The end of the driving shaft 5601 far from the connecting part 5603 penetrates through the adjusting groove 540.

[0050] The flexible circuit board 400 further includes two second redundant portions 404 and two fixing portions 406. The two second redundant portions 404 are located on both sides of the first redundant portion 401, that is, the two second redundant portions 404 are respectively connected to opposite sides of the first redundant portion 401; the fixing portions 406 are connected to the sides of the second redundant portions 404 away from the first redundant portion 401. Specifically, one fixing portion 406 is connected to the side of one second redundant portion 404 away from the first redundant portion 401, and the other fixing portion 406 is connected to the side of the other second redundant portion 404 away from the first redundant portion 401. The sides of the two fixing portions 406 away from the first redundant portion 401 are respectively electrically connected to the electronic devices in the two frames 21.

[0051] Optionally, the extending direction of the adjusting groove 540 intersects with the sliding direction of the adjusting member 54 relative to the back shell 59. Preferably, the extending direction of the adjusting groove 540 is perpendicular to the sliding direction of the adjusting member 54 relative to the back shell 59; the adjusting groove 540 includes a first positioning section 5401 and a second positioning section 5403 respectively located at its opposite ends; when the folding device 50 is in a flattened state, the driving shaft 5601 is located in the first positioning section 5401, and the first redundant portion 401 of the flexible circuit board 400 bends towards the back shell 59 and is received in the receiving portion 590; when the folding device 50 is in a folded state, the driving shaft 5601 is located in the second positioning section 5403, and the first redundant portion 401 is in a flattened state.

[0052] Optionally, the adjusting member 54 and the back shell 59 are connected by the cooperation of a guiding slide post and a guiding slide hole. The guiding slide post is slidably disposed through the guiding slide hole. The guiding slide post is disposed on one of the back shell 59 and the adjusting member 54, and the guiding slide hole is disposed on the other of the adjusting member 54 and the back shell 59. The axial direction of the guiding slide post is parallel to the sliding direction of the adjusting member 54. In this embodiment, a guiding slide post 591 is provided on the inner surface of the back shell 59, and the guiding slide post 591 is received in the receiving portion 590. The adjusting member 54 is provided with a guiding slide hole 5404. When the adjusting member 54 is received in the receiving portion 590, the guiding slide post 591 can be slidably disposed through the guiding slide hole 5404. Two adjusting slots 540 are respectively provided at opposite ends of the adjusting member 54. The extending direction of each adjusting slot 540 intersects with the sliding direction of the adjusting member 54 relative to the back shell 59. Preferably, the extending direction of each adjusting slot 540 is perpendicular to the sliding direction of the adjusting member 54 relative to the back shell 59. The two driving shafts 5601 of the folding assisting assembly 51 are respectively slidably and rotatably received in the two adjusting slots 540. Specifically, the adjusting member 54 includes a fixing plate 542 and adjusting strips 544 provided on opposite sides of each end of the fixing plate 542. Each adjusting strip 544 is provided with an adjusting slot 540. The two adjusting slots 540 are parallel to each other. The two driving shafts 5601 are respectively slidably and rotatably received in the two adjusting slots 540. In this embodiment, the fixing plate 542 is a rectangular plate. Adjusting strips 544 are respectively provided at opposite ends of one side of the fixing plate 542, and adjusting strips 544 are respectively provided at both ends of the opposite side of the fixing plate 542. Each adjusting strip 544 is provided with an adjusting slot 540. The length directions of the four adjusting slots 540 are parallel to each other; further, the four adjusting slots 540 are located on the same plane. One end of each adjusting slot 540 away from the fixing plate 542 penetrates through the end face of the corresponding adjusting strip 544. The first positioning section 5401 of each adjusting slot 540 is located at the end close to the fixing plate 542, and the second positioning section 5403 is located at the end away from the fixing plate 542.

[0053] The flexible circuit board 400 and the adjusting member 54 can be fixedly connected by, but not limited to, clamping, gluing and other methods. In this embodiment, a fixing groove 546 is provided on the adjusting member 54, and an adhesive member 547 is provided in the fixing groove 546. The first redundant portion 401 of the flexible circuit board 400 is connected to the adhesive member 547. Specifically, the fixing groove 546 is located on the side surface of the fixing plate 542 facing the flexible circuit board 400. The adhesive member 547 is received in the fixing groove 546, and the outer surface of the adhesive member 547 slightly protrudes from the fixing plate 542. The middle of the first redundant portion 401 is glued to the adhesive member 547.

[0054] The back shell 59 includes a rectangular back plate 592, side walls 594 connected to opposite sides of the back plate 592, and two end plates provided at opposite ends of the back plate 592. The back plate 592 and the two side walls 594 enclose a receiving portion 590. The adjusting member 54 has a first distance from the back plate 592 at the first position and a second distance from the back plate 592 at the second position. The first distance is less than the second distance. That is, when the folding device 50 is in the flattened state, the adjusting member 54 is at the first position in the receiving portion 590, and there is a first distance between the adjusting member 54 and the back plate 592. When the folding device 50 is in the folded state, the adjusting member 54 is at the second position in the receiving portion 590, and there is a second distance between the adjusting member 54 and the back plate 592. The first distance is less than the second distance. Two guide sliding columns 591 are provided in parallel and spaced apart in the middle of the back plate 592. The axial direction of each guide sliding column 591 is perpendicular to the inner surface of the back plate 592. When the adjusting member 54 is received in the receiving portion 590, the two guide sliding columns 591 are respectively slidably inserted into the two guide sliding holes 5404. Optionally, the back shell 59 is provided with a wire groove 5941 for threading the flexible circuit board 400. In this embodiment, wire grooves 5941 are respectively provided on opposite sides of the back shell 59, and each wire groove 5941 communicates with the receiving portion 590. The flexible circuit board 400 can be slidably threaded through the wire groove 5941. Specifically, wire grooves 5941 are respectively provided on the front surfaces of the two side walls 594, and each wire groove 5941 is located between the two guide sliding columns 591. Connection portions 595 are respectively provided at opposite ends of the front surface of the back shell 59, and the bases 53 of the two folding assisting assemblies 51 are respectively connected to the two connection portions 595 of the back shell 59. The connection portion 595 includes a plurality of connection columns 596, and each connection column 596 is provided with a connection hole 5964 along its axial direction.

[0055] Such as Figures 4 - 10As shown, the support mechanism 52 includes a middle support member 521 and two side support members 523 located on opposite sides of the middle support member 521. The middle support member 521 is connected to the base 53. The middle support member 521 is a strip-shaped connecting piece, and connecting holes 5212 are respectively provided at opposite ends of the front surface of the connecting piece. The locking member passes through the connecting holes 5212 and is connected to the folding assist assembly 51, so that the middle support member 521 is connected to the back shell 59. One of the side support members 523 is movably connected to a rotating mechanism 55 and a linkage mechanism 56 on one side of the base 53, and the other side support member 523 is movably connected to the rotating mechanism 55 and the linkage mechanism 56 on the opposite side of the base 53. The two side support members 523 rotate synchronously relative to the middle support member 521 through the rotating mechanism 55 and the linkage mechanism 56. The side rotating mechanism 55 on one side of the back shell 59 rotates relative to the base 53 and drives the other side support member 523 to rotate synchronously relative to the base 53 through the linkage mechanism 56, so as to realize the synchronous unfolding or synchronous bending of the two side support members 523, and complete the synchronous folding or synchronous unfolding of the folding device 50. The back surface of the flexible screen 30 is attached to the front surface of the middle support member 521 and the front surface of the side support members 523, and the bendable area 31 of the flexible screen 30 bends or unfolds as the support mechanism 52 bends or unfolds.

[0056] Each side support member 523 includes a strip-shaped support plate 5230 and a connection area 5232 provided on the back surface of the support plate 5230. In this embodiment, connection areas 5232 are respectively provided at opposite ends of the back surface of the support plate 5230, and the connection areas 5232 are used to connect the corresponding rotating mechanisms 55. Each connection area 5232 includes a pair of first connection portions 5233 and second connection portions 5236 that are spaced apart from each other, and the second connection portions 5236 are located between the pair of first connection portions 5233. A pair of circular arc-shaped rotating grooves 5234 are provided on each pair of first connection portions 5233, and the axes of the pair of rotating grooves 5234 are collinear. The rotating grooves 5234 are located at the end of the first connection portion 5233 away from the middle support member 521. An arc-shaped adjustment groove 5237 is provided on the second connection portion 5236, and the middle of the adjustment groove 5237 bends toward the side away from the hinge body. The adjustment groove 5237 includes a first positioning section 5237a and a second positioning section 5237b at its opposite ends, and the first positioning section 5237a is closer to the middle support member 521 than the second positioning section 5237b.

[0057] Please refer to Figures 7 - 10 and Figures 13 - 15, the rotating member 550 includes a first rotating portion 552 and a second rotating portion 553. The first rotating portion 552 is disposed at one end of the rotating member 550, and the second rotating portion 553 is disposed at the opposite end of the rotating member 550. The first rotating portion 552 is rotatably connected to the base 53 through the cooperation of an arc track and an arc groove. The arc groove is disposed on one of the base 53 and the first rotating portion 552, and the arc track is disposed on the other of the base 53 and the first rotating portion 552. The axis line of the arc groove is collinear with the rotation axis line between the rotating member 550 and the base 53. In this embodiment, receiving grooves 530 are respectively disposed on opposite sides of the front surface of the base 53. The first rotating portion 552 of one rotating member 550 is rotatably received in one of the receiving grooves 530, and the first rotating portion 552 of the other rotating member 550 is rotatably received in the other receiving groove 530. Arc grooves 532 are respectively disposed on two opposite inner end faces of each receiving groove 530. The two arc grooves 532 at opposite ends of each receiving groove 530 are coaxial. Opposite ends of each arc groove 532 penetrate through the front surface of the base 53. Arc tracks 5522 are respectively disposed on two opposite end faces of the first rotating portion 552. The two arc tracks 5522 are coaxial. When the first rotating portion 552 is received in the corresponding receiving groove 530, the two arc tracks 5522 are respectively rotatably received in the two arc grooves 532. The second rotating portion 553 is rotatably connected to the connecting member 555 through a rotating shaft 551.

[0058] The second rotating portion 553 is rotatably connected to the connecting member 555 through the rotating shaft 551 at the first end of the connecting member 555. Two spaced-apart lugs 5531 are disposed at the end of the second rotating portion 553 away from the first rotating portion 552. Two spaced-apart receiving grooves 5552 are disposed at the first end of the connecting member 555. The two lugs 5531 are respectively rotatably received in the two receiving grooves 5552. The rotating member 550 further includes two first connecting cylinders 5533, and the two first connecting cylinders 5533 are respectively connected to the ends of the two lugs 5531 away from the first rotating portion 552; the connecting member 555 includes two second connecting cylinders 5553, and the two second connecting cylinders 5553 are disposed at the first end of the connecting member 555. The receiving groove 5552 communicates with the inner cavity of the second connecting cylinder 5553. The first connecting cylinder 5533 and the second connecting cylinder 5553 are mutually embedded, so that the first connecting cylinder 5533 and the second connecting cylinder 5553 are coaxial. The rotating shaft 551 passes through the inner cavities of the first connecting cylinder 5533 and the second connecting cylinder 5553.

[0059] The base 53 includes a first body 531 and a second body 534 connected to the first body 531. The first body 531 and the second body 534 can be connected by, but not limited to, snap connection, adhesive bonding, screw connection or integral molding. In this embodiment, the first body 531 and the second body 534 are snap-connected through the cooperation of positioning posts and positioning holes. The positioning posts are provided on one of the first body 531 and the second body 534, and the positioning holes are provided on the other of the first body 531 and the second body 534. Specifically, a positioning post 5312 is provided on the side of the first body 531 facing the second body 534, and a positioning hole 5342 is provided on the side of the second body 534 facing the first body 531. At opposite ends of the front side of the first body 531 near the second body 534, first receiving grooves 5314 are respectively provided. At opposite ends of the front side of the second body 534 near the first body 531, second receiving grooves 5344 are respectively provided. When the first body 531 is connected to the second body 534, the first receiving groove 5314 and the second receiving groove 5344 on the same side of the base 53 enclose a receiving groove 530. An arc groove 532 is provided at the end face of each first receiving groove 5314 of the first body 531, and the axes of the two arc grooves 532 are spaced parallel to each other. An arc groove 532 is provided at the end face of each second receiving groove 5344 of the second body 534, and the axes of the two arc grooves 532 are spaced parallel to each other. Mounting holes 533 are provided on the front side of the base 53. After the locking member passes through the mounting holes 533, it is locked to the back shell 59 so that the base 53 is fixedly connected to the back shell 59. On the end face of the second body 534 facing away from the first body 531, two first shaft holes 535, two connection holes 536 and a fixing hole 537 are provided. The two first shaft holes 535 are located on opposite sides of the base 53. The two connection holes 536 are located between the two first shaft holes 535. The fixing hole 537 is located between the two connection holes 536.

[0060] In other embodiments, the arc grooves 532 on the base 53 and the arc tracks 5522 on the first rotating part 552 can be interchanged. Specifically, arc tracks are respectively provided on the two end faces of the base 53 opposite to the receiving groove 530, and the two arc tracks on the same side of the base 53 share the same axis. Arc grooves are respectively provided on opposite sides of the first rotating part 552, and the two arc grooves share the same axis. When the first rotating part 552 is received in the corresponding receiving groove 530, the two arc tracks can be respectively rotatably received in the two arc grooves.

[0061] Please refer to Figures 13 - 19, the gear combination 564 includes a driving gear 5641 provided on the connecting rod member 562 and synchronous gears 5643 that mesh with each other. Each driving gear 5641 meshes with a corresponding synchronous gear 5643. The two connecting rod members 562 can rotate synchronously through the gear combination 564 to drive the two rotating shafts 561 and the two adjusting members 54 to rotate synchronously. One end of a connecting rod member 562 away from the base 53 is slidably connected to the second end of the corresponding connecting member 555 away from the rotating member 550 through the cooperation of a guide chute and a guide rail. The guide chute is provided on one of the connecting rod member 562 and the corresponding connecting member 555, and the guide rail is provided on the other of the connecting rod member 562 and the corresponding connecting member 555. The guide chute extends along the axial direction perpendicular to the rotating shaft 561. In this embodiment, a clearance groove 5554 is provided at the second end of the front surface of the connecting member 555 away from the rotating member 550. Guide chutes 5550 are respectively provided on the opposite side surfaces of the connecting member 555 at the clearance groove 5554, and guide rails 5620 are respectively provided on the opposite sides of the connecting rod member 562. The two guide rails 5620 respectively pass through the two guide chutes 5550 slidably. Rotating rails 5556 are respectively provided at the opposite ends of the connecting member 555, and the two rotating rails 5556 are respectively rotatably received in the two rotating grooves 5234 to rotatably connect the side support member 523 to the connecting member 555. In other embodiments, rotating grooves are respectively provided at the opposite ends of the connecting member 555, and the side support member 523 is provided with rotating rails corresponding to the rotating grooves of the connecting member 555. The rotating rails are rotatably received in the corresponding rotating grooves to rotatably connect the side support member 523 to the connecting member 555.

[0062] The rotating shaft 561 includes a shaft body 5610 and a connecting cap 5612. The connecting cap 5612 is located at one end of the shaft body 5610; a positioning portion 5613 is provided at the shaft body 5610 near the connecting cap 5612. One rotating shaft 561 is fixedly connected to one connecting rod member 562 through its positioning portion 5613, and the other rotating shaft 561 is fixedly connected to the other connecting rod member 562 through its positioning portion 5613. Specifically, the positioning portion 5613 is a positioning surface provided on the outer wall of the shaft body 5610, and the length direction of the positioning surface is parallel to the axial direction of the shaft body 5610. The connecting cap 5612 is a cylinder, and the cylinder is used to rotatably connect to the base 53. A clamping groove 5616 is provided at the end of the shaft body 5610 away from the connecting cap 5612. The clamping groove 5616 is located on the outer peripheral wall of the shaft body 5610 and surrounds the circumference of the shaft body 5610.

[0063] The connecting rod 562 further comprises a sleeve 5622 and a connecting rod 5623 connected to the outer peripheral wall of the sleeve 5622. The sleeve 5622 can be sleeved on the positioning portion 5613 of the shaft body 5610. Specifically, the sleeve 5622 is provided with a non-circular second shaft hole 5624 along its axial direction. After the rotating shaft 561 is inserted into the second shaft hole 5624 of the sleeve 5622, the sleeve 5622 can be positioned on the positioning portion 5613. The sleeve 5622 and the rotating shaft 561 can rotate together around the axis of the rotating shaft 561. In this embodiment, the driving gear 5641 is provided on the outer peripheral wall of the sleeve 5622, and the driving gear 5641 is located on the side of the sleeve 5622 away from the connecting rod 5623, and the axis center line of the driving gear 5641 is colinear with the axis center line of the sleeve 5622. An escape groove 5621 is provided at one end of the connecting rod 5623 away from the sleeve 5622, and an adjustment shaft 5628 is provided on one inner side of the escape groove 5621, and the axis of the adjustment shaft 5628 is parallel to the axis of the sleeve 5622. Guide rails 5620 are protruded from opposite sides of the connecting rod 5623, and the guide rails 5620 extend along the length direction of the connecting rod 5623.

[0064] In some embodiments, guide slide grooves are respectively provided on the opposite sides of the connecting rod 5623, and guide slide rails are respectively protruding on the opposite sides of the avoidance groove 5554 of the connecting member 555. When the connecting rod 5623 is accommodated in the receiving groove 5552 of the connecting member 555, the two guide slide rails can be slidably inserted into the two guide slide grooves respectively.

[0065] The synchronous gear 5643 includes a rotating shaft 5644 and a gear ring 5646. The gear ring 5646 is fixedly sleeved on the rotating shaft 5644. The opposite ends of the rotating shaft 5644 extend out of the opposite end surfaces of the gear ring 5646. In this embodiment, the gear assembly 564 includes a pair of mutually meshing synchronous gears 5643, wherein one synchronous gear 5643 is meshed with one of the driving gears 5641, and the other synchronous gear 5643 is meshed with the other driving gear 5641.

[0066] The linkage mechanism 56 further includes a fixing member 565 which is connected to one end of two rotating shafts 561. Specifically, the fixing member 565 is a rectangular positioning piece. Opposite ends of the fixing member 565 are respectively provided with first guiding sliding holes 5652. The shaft bodies 5610 of the two rotating shafts 561 respectively pass through the two first guiding sliding holes 5652, and each rotating shaft 561 can rotate in the corresponding first guiding sliding hole 5652. The fixing member 565 can only slide axially along the two rotating shafts 561. Two spaced-apart first connection holes 5654 are provided in the middle of the fixing member 565. The two first connection holes 5654 are located between the two first guiding sliding holes 5652. The axis line of the first guiding sliding hole 5652 is parallel to the axis line of the first connection hole 5654. A positioning portion 5656 is provided on the side of the fixing member 565 facing away from the synchronous gear 5643. Specifically, the positioning portion 5656 is a positioning block, and the length direction of the positioning block is parallel to the axis line of the first guiding sliding hole 5652. The connecting rod member 562 includes a first limiting surface 5626 and a second limiting surface 5627. When the two connecting rod members 562 are in a folded state relative to the base 53, the positioning portion 5656 abuts against the first limiting surface 5626. When the two connecting rod members 562 are in a flattened state relative to the base 53, the positioning portion 5656 abuts against the second limiting surface 5627. Specifically, a notch is provided around the second shaft hole 5624 at one end of the sleeve 5622 facing the fixing member 565. The first limiting surface 5626 and the second limiting surface 5627 are respectively the two opposite end faces of the notch. The first limiting surface 5626 is farther away from the guide rail 5620 than the second limiting surface 5627. A positioning rod 5657 is provided on the side of the fixing member 565 facing away from the positioning portion 5656. The length direction of the positioning rod 5657 is parallel to the axis line of the first guiding sliding hole 5652, and the positioning rod 5657 is used for positioning on the base 53.

[0067] The limiting mechanism 57 includes a pushing member 572, a holding member 573, an elastic member 575, a pressing member 576 and a friction assembly 577 provided on the connecting rod member 562; the pushing member 572, the holding member 573, the elastic member 575, the pressing member 576 and the friction assembly 577 are sleeved on the rotating shaft 561, and the opposite ends of the elastic member 575 are elastically abutted against the holding member 573 and the pressing member 576 respectively. The pushing member 572 includes a cam 5720, the cam 5720 is provided at one end of the sleeve 5622, and the cam 5720 and the sleeve 5622 are coaxial. The cam 5720 is provided at the end of the sleeve 5622 away from the driving gear 5641, and the cams 5720 of the two connecting rod members 562 are on the same side. Optionally, the cam 5720 includes a concave-convex surface provided at the end of the sleeve 5622, the concave-convex surface includes a first protruding portion 5724 and a first recessed portion 5725, and the first protruding portion 5724 and the first recessed portion 5725 are arranged at intervals in sequence along the circumferential direction of the sleeve 5622. The number of the first protruding portions 5724 and the number of the first recessed portions 5725 can be set as required. For example, the cam 5720 can include one first protruding portion 5724 and one first recessed portion 5725, two first protruding portions 5724 and two first recessed portions 5725, three first protruding portions 5724 and three first recessed portions 5725, or four first protruding portions 5724 and four first recessed portions 5725, etc. In this embodiment, the cam 5720 includes three first protruding portions 5724 and three first recessed portions 5725.

[0068] The holding member 573 includes two first sliding cylinders 5730 that are parallel and spaced apart, a pressing cam 5731, and a connecting bar 5732. The two first sliding cylinders 5730 are respectively connected to opposite ends of the connecting bar 5732. The pressing cam 5731 is disposed at one end of the first sliding cylinder 5730, and the pressing cam 5731 and the first sliding cylinder 5730 are coaxial. In this embodiment, the holding member 573 includes two pressing cams 5731. The two pressing cams 5731 are respectively disposed at one end of the two first sliding cylinders 5730. The two pressing cams 5731 are located on the same side of the connecting bar 5732. Each pressing cam 5731 and the corresponding first sliding cylinder 5730 are coaxial. The two first sliding cylinders 5730 and the two pressing cams 5731 are respectively slidably sleeved on a pair of rotating shafts 561, and the two rotating shafts 561 are respectively rotatably inserted into the two first sliding cylinders 5730. The holding member 573 can only slide axially along the rotating shafts 561. The pressing cam 5731 includes a concave-convex surface disposed at one end of the first sliding cylinder 5730. The concave-convex surface includes a second protruding portion 5734 and a second recessed portion 5735. The second protruding portion 5734 and the second recessed portion 5735 are sequentially and spaced apart along the circumferential direction of the sleeve. The number of the second protruding portions 5734 and the number of the second recessed portions 5735 on the pressing cam 5731 are the same as the number of the first protruding portions 5724 and the number of the first recessed portions 5725 on the cam 5720, so that the first protruding portion 5724 cooperates with the second recessed portion 5735, and the second protruding portion 5734 cooperates with the first recessed portion 5725. The holding member 573 is provided with two second connection holes 5736 between the two first sliding cylinders 5730. The axis line of the second connection hole 5736 is parallel to the axis line of the first sliding cylinder 5730. The opposite ends of the rotating shaft 5644 of the synchronous gear 5643 are respectively inserted through the first connection hole 5654 and the second connection hole 5736.

[0069] Optionally, the abutting member 576 includes two second sliding cylinders 5760 spaced parallel to each other and a positioning portion 5763. The two second sliding cylinders 5760 are respectively connected to opposite ends of the positioning portion 5763. The two rotating shafts 561 are respectively slidably and rotatably inserted into the two second sliding cylinders 5760. The abutting member 576 is connected to the pair of rotating shafts 561 in a manner that it can only slide axially along the rotating shafts 561. The elastic member 575 is clamped between the first sliding cylinder 5730 and the second sliding cylinder 5760. In this embodiment, the elastic member 575 is a spring sleeved on each rotating shaft 561, and opposite ends of the spring respectively abut against the first sliding cylinder 5730 and the second sliding cylinder 5760. Specifically, the positioning portion 5763 is a rectangular positioning block. The two second sliding cylinders 5760 are provided on opposite sides of the positioning block. The second sliding cylinder 5760 is provided with a second guiding hole 5765 along its axial direction. Optionally, two avoiding holes 5767 are provided on a side of the positioning portion 5763 facing the synchronous gear 5643. One end of the rotating shafts 5644 of the two synchronous gears 5643 can be respectively inserted into the two avoiding holes 5767 of the positioning portion 5763. A first anti-sliding portion 5768 is provided around each second guiding hole 5765 on a side of the abutting member 576 facing away from the positioning portion 5763.

[0070] The friction assembly 577 includes a friction member 5770, a gasket 578, and a buckle 579. The friction member 5770, the gasket 578, the driving member 560, and the buckle 579 are all connected to the rotating shaft 561. The friction member 5770 is clamped by the abutting member 576 and the gasket 578, and the driving member 560 is clamped by the gasket 578 and the buckle 579. The friction member 5770, the driving member 560, and the buckle 579 can rotate relative to the abutting member 576 and the gasket 578 along with the rotating shaft 561. There is a frictional resistance between the friction member 5770 and the abutting member 576 and / or the gasket 578, and there is a frictional resistance between the driving member 560 and the gasket 578. Specifically, the friction member 5770 and the driving member 560 are both sleeved on the rotating shaft 561. The buckle 579 is used to be snapped into the slot 5616 of the rotating shaft 561. The driving member 560 is clamped by the buckle 579 and the gasket 578, and the driving member 560 can rotate relative to the gasket 578 along with the rotating shaft 561. In this embodiment, the friction assembly 577 includes a pair of friction members 5770. The pair of friction members 5770 are respectively sleeved on two rotating shafts 561. The pair of driving members 560 are respectively sleeved on two rotating shafts 561. The pair of buckles 579 are respectively snapped into the slots 5616 of the pair of rotating shafts 561. The pair of friction members 5770 are clamped by the gasket 578 and the abutting member 576, and the pair of driving members 560 are clamped by the gasket 578 and the pair of buckles 579. When the rotating shaft 561 rotates relative to the base 53, the friction member 5770 and the driving member 560 rotate together along with the rotating shaft 561. There is a frictional resistance between the friction member 5770 and the abutting member 576 and the gasket 578, and there is a frictional resistance between the driving member 560 and the gasket 578. The buckle 579 can be but is not limited to a C-shaped buckle or a U-shaped buckle, etc.

[0071] Specifically, the friction member 5770 is a circular friction pad. A first positioning hole 5772 is axially opened in the middle of the friction pad. The friction member 5770 is fixedly connected to the rotating shaft 561 through the first positioning hole 5772. A second anti-slip portion 5774 is provided around the first positioning hole 5772 on the side of the friction member 5770 facing the positioning member 567, and / or a second anti-slip portion 5774 is provided around the first positioning hole 5772 on the side of the friction member 5770 facing the gasket 578. The second anti-slip portion 5774 can increase the frictional resistance of the friction member 5770. In this embodiment, a first anti-slip portion 5768 is provided on the side of the abutting member 576 facing the friction member 5770, and second anti-slip portions 5774 are respectively provided on the opposite two side surfaces of the friction member 5770. Optionally, the first anti-slip portion 5768 on the abutting member 576 can be omitted, and only the second anti-slip portion 5774 on the side of the friction member 5770 facing the abutting member 576 is retained; or the second anti-slip portion 5774 on the side of the friction member 5770 facing the abutting member 576 can be omitted, and only the first anti-slip portion 5768 on the abutting member 576 is retained.

[0072] The spacer 578 is slidably sleeved on a pair of rotating shafts 561, and the friction member 5770 is between the spacer 578 and the abutting member 576; when the friction member 5770 rotates with the rotating shaft 561, there is a frictional resistance between the friction member 5770 and the abutting member 576, and there is also a frictional resistance between the friction member 5770 and the spacer 578. Specifically, the spacer 578 is a strip-shaped plate, through holes 5782 are respectively provided at opposite ends of the spacer 578, and third anti-slip portions 5784 are respectively provided around each through hole 5782 on opposite side surfaces of the spacer 578. In this embodiment, the third anti-slip portions 5784 are respectively provided on opposite side surfaces of the spacer 578. In some embodiments, the third anti-slip portions 5784 on the side surface of the spacer 578 facing the friction member 5770 can be omitted, and only the second anti-slip portions 5774 on the side surface of the friction member 5770 facing the spacer 578 are retained; or the second anti-slip portions 5774 on the side surface of the friction member 5770 facing the spacer 578 can be omitted, and only the third anti-slip portions 5784 on the side surface of the spacer 578 facing the friction member 5770 are retained.

[0073] A second positioning hole 5605 is axially opened in the middle of the connecting portion 5603 parallel to the driving shaft 5601. The driving member 560 is fixedly connected to the rotating shaft 561 through the second positioning hole 5605. The third anti-slip portion 5784 is provided on the side surface of the spacer 578 facing the driving member 560, and / or the fourth anti-slip portion 5607 is provided on the side surface of the driving member 560 facing the spacer 578. In this embodiment, the third anti-slip portion 5784 is provided on the side surface of the spacer 578 facing the driving member 560, and the fourth anti-slip portion 5607 is provided around the second positioning hole 5605 on the side surface of the driving member 560 facing the spacer 578. In some embodiments, the third anti-slip portion 5784 on the side surface of the spacer 578 facing the driving member 560 can be omitted, and only the fourth anti-slip portion 5607 on the side surface of the driving member 560 facing the spacer 578 is retained; or the fourth anti-slip portion 5607 on the side surface of the driving member 560 facing the spacer 578 can be omitted, and only the third anti-slip portion 5784 on the side surface of the spacer 578 facing the driving member 560 is retained. The spacer 578 and the driving member 560 abut against each other, and when the driving member 560 rotates with the rotating shaft 561, there is a frictional resistance between the driving member 560 and the spacer 578. The first anti-slip portion 5768, the second anti-slip portion 5774, the third anti-slip portion 5784, and the fourth anti-slip portion 5607 can all be, but are not limited to, a rough surface, a damping layer, a plurality of small protrusions or a plurality of small concave convex portions, holes, or a rough surface, etc.

[0074] As Figures 6 - 12As shown, the folding device 50 further includes two support members 58, one of the support members 58 is connected to one of the connecting members 555, and the other support member 58 is connected to the other connecting member 555. When the two rotating mechanisms 55 are in a flattened state, a second storage space 580 is formed between each support member 58 and the back shell 59, and the second storage space 580 communicates with the corresponding wire groove 5941. The second storage space 580 is used to accommodate the second redundant portion 404 of the flexible circuit board 400. Specifically, the support member 58 includes a support bar 582 and connecting pieces 584 provided at opposite ends of the support bar 582. A support groove 5821 is provided on the support member 58. Specifically, the support groove 5821 is located on the front surface of the support bar 582, and the length direction of the support groove 5821 is parallel to the length direction of the support bar 582. Connecting holes 5842 are provided on the connecting pieces 584.

[0075] Please refer to Figures 16 - 19, when assembling the linkage mechanism 56 and the limiting mechanism 57, insert the end portions of the two rotating shafts 561 away from the connecting caps 5612 into the two first guiding sliding holes 5652 of the fixing member 565 respectively until the connecting caps 5612 are stopped against the fixing member 565; engage the gear rings 5646 of the two synchronous gears 5643 with each other and place them between the two link members 562, and engage the two driving gears 5641 with the two synchronous gears 5643 respectively; insert the end portions of the two rotating shafts 561 away from the connecting caps 5612 into the two sleeves 5622 respectively, and insert the end portions of the two rotating shafts 5644 of the gear combination 564 close to the fixing member 565 into the two first connecting holes 5654 of the fixing member 565, and place the positioning portions 5656 in the notches of the corresponding sleeves 5622; each positioning portion 5656 is located between the corresponding first limiting surface 5626 and the second limiting surface 5627. Sleeve the abutting member 573 on the two rotating shafts 561 so that the two abutting cams 5731 can be rotatably engaged with the two cams 5720 respectively; sleeve the two elastic members 575 on the two rotating shafts 561 respectively, and sleeve the two second sliding cylinders 5760 of the abutting member 576 on the two rotating shafts 561 respectively so that the two elastic members 575 are clamped between the abutting member 573 and the abutting member 576; sleeve two of the friction members 5770 on the two rotating shafts 561 respectively, sleeve the gasket 578 on the two rotating shafts 561, and then sleeve the two driving members 560 on the two rotating shafts 561 respectively. At this time, the gasket 578 is located between the friction member 5770 and the driving member 560, the driving shafts 5601 face away from the gasket 578, and the card slots 5616 of each rotating shaft 561 are exposed on the side of the corresponding driving member 560 facing away from the abutting member 576; then snap the two fasteners 579 onto the card slots 5616 of the two rotating shafts 561 respectively. At this time, the cams 5720 and the abutting cams 5731 on the same rotating shaft 561 are coaxial and cooperate with each other, the elastic member 575 is in a compressed state for pushing the abutting member 573 so that the cam 5720 rotatably abuts against the abutting cam 5731, the two fasteners 579 respectively abut against the sides of the two driving members 560 facing away from the gasket 578, and the two driving shafts 5601 are respectively exposed on one side of the two fasteners 579 facing away from the gasket 578. The plane where the axes of the two rotating shafts 561 are located is parallel to the plane where the axes of the two driving shafts 5601 are located.

[0076] When the linkage mechanism 56 is bent from the flattened state, one of the link members 562 is bent relative to the abutting member 573 toward the other link member 562. This one link member 562 rotates about the axis of the corresponding rotating shaft 561 to drive the corresponding rotating shaft 561, the driving gear 5641, the corresponding pushing member 572, the friction member 5770, and the driving member 560 to rotate about the axis of the rotating shaft 561. The rotating driving gear 5641 drives the other driving gear 5641 to rotate through the synchronous gear 5643. The rotation of the other driving gear 5641 drives the corresponding rotating shaft 561, the sleeve 5622, the link member 562, the pushing member 572, the friction member 5770, and the driving member 560 to rotate, so that the two link members 562 of the linkage mechanism 56 approach each other synchronously. When the linkage mechanism 56 is unfolded from the fully bent state, one link member 562 is unfolded relative to the abutting member 573 away from the other link member 562. This one link member 562 rotates along the axis of the corresponding rotating shaft 561 to drive the corresponding rotating shaft 561, the driving gear 5641, the corresponding pushing member 572, the friction member 5770, and the driving member 560 to rotate along the axis of the rotating shaft 561. The rotating driving gear 5641 drives the other driving gear 5641 to rotate through the synchronous gear 5643, and then drives the corresponding rotating shaft 561, the sleeve 5622, the link member 562, the pushing member 572, the friction member 5770, and the driving member 560 to rotate, so that the two link members 562 of the linkage mechanism 56 move away from each other synchronously.

[0077] During the folding or unfolding process of the linkage mechanism 56, the pushing members 572 on the two link members 562 rotate relative to the abutting member 573 respectively, so that the two cams 5720 rotate and respectively push the two abutting cams 5731. The abutting member 573 slides axially along the rotating shaft 561 to compress the elastic member 575. The elastic member 575 elastically pushes the abutting member 576, so that the friction member 5770 is clamped between the gasket 578 and the abutting member 576, and the driving member 560 is clamped between the gasket 578 and the buckle 579, and the friction member 5770 and the driving member 560 rotate with the corresponding rotating shaft 561. The frictional torque between each cam 5720 and the corresponding abutting cam 5731, the frictional resistance of the friction member 5770, and the frictional resistance of the driving member 560 can limit the two link members 562 at a specific angle between 180 degrees and 0 degrees. When the included angle between the two link members 562 is 180 degrees, the linkage mechanism 56 is in the flattened state. When the included angle between the two link members 562 is 0 degrees, the linkage mechanism 56 is in the fully bent state.

[0078] Please refer to Figures 3 - 10 and Figures 13 - 15, when assembling the folding device 50, place the two first connecting cylinders 5533 of one rotating member 550 in the two receiving grooves 5552 of one connecting member 555, and place the two first connecting cylinders 5533 of the other rotating member 550 in the two receiving grooves 5552 of the other connecting member 555; insert the two rotating shafts 551 into the inner cavities of the corresponding first connecting cylinders 5533 and the inner cavities of the corresponding second connecting cylinders 5553 respectively, so that the two rotating members 550 are rotatably connected to the two connecting members 555 respectively. Place the first rotating portion 552 of one rotating member 550 in the receiving groove 530 on one side of the base 53, and place the first rotating portion 552 of the other rotating member 550 in the receiving groove 530 on the relatively opposite side of the base 53, so that the two arc tracks 5522 of each first rotating portion 552 are rotatably received in the two arc grooves 532 of the base 53 respectively, and the positioning post 5312 is clamped in the positioning hole 5342. Place the combination of the linkage mechanism 56 and the limiting mechanism 57 between the two connecting members 555, insert the two guide rails 5620 of one link member 562 into the two guide chutes 5550 of one connecting member 555 respectively, insert the two guide rails 5620 of the other link member 562 into the guide chutes 5550 of the other connecting member 555 respectively, and insert the two connecting caps 5612, the two rotating shafts 5644 and the positioning rod 5657 into the two first shaft holes 535, the two connecting holes 536 and the fixing hole 537 respectively. Connect the middle part of the first redundant portion 401 of the flexible circuit board 400 to the bonding member 547 of the adjusting member 54, and connect the fixing portion 406 of the flexible circuit board 400 to the support groove 5821 of the support member 58 through the positioning member 407. Specifically, connect the two fixing portions 406 of the flexible circuit board 400 to the support grooves 5821 of the two support members 58 through the positioning member 407 respectively; place the bases 53 of the two folding assisting assemblies 51 on the two connecting portions 595 of the back shell 59 respectively, place the flexible circuit board 400, the adjusting member 54 and the two support members 58 between the two folding assisting assemblies 51, insert the two guide posts 591 into the two guide holes 5404 of the adjusting member 54 respectively, insert each driving shaft 5601 into the corresponding guide hole 5404, and the part between the second redundant portion 404 and the first redundant portion 401 on one side of the flexible circuit board 400 is slidably received in the wire groove 5941 on one side of the back shell 59, and the part between the second redundant portion 404 and the first redundant portion 401 on the relatively opposite side of the flexible circuit board 400 is slidably received in the wire groove 5941 on the relatively opposite side of the back shell 59.Connect the two connecting pieces 584 of one of the supporting members 58 to the two connecting members 555 on one side of the back shell 59 respectively through fasteners passing through the corresponding connecting holes 5842, and connect the two connecting pieces 584 of the other supporting member 58 to the two connecting members 555 on the opposite side of the back shell 59 respectively through fasteners passing through the corresponding connecting holes 5842; cover the middle supporting member 521 on the adjusting member 54, and place the opposite ends of the middle supporting member 521 on the two bases 53 respectively, so that the flexible circuit board 400 is located between the adjusting member 54 and the middle supporting member 521, and the fastener passes through the connecting hole 5212 on the middle supporting member 521 and the mounting hole 533 on the base 53 and is locked to the corresponding connecting post; place the two side supporting members 523 on the opposite sides of the base 53, rotatably receive the two rotating rails 5556 of each connecting member 555 in the corresponding pair of rotating grooves 5234 respectively, and pass the adjusting shaft 5628 of each connecting rod member 562 through the corresponding adjusting groove 5237; make the middle supporting member 521 located between the two side supporting members 523.

[0079] The rotating member 550 can rotate relative to the base 53 about the first axis L1, the connecting rod member 562 can rotate relative to the base 53 about the second axis L2 of the corresponding rotating shaft 561, and the first axis L1 is spaced parallel to the second axis L2. The folding device 50 can be folded or unfolded. Specifically, one of the connecting members 555 drives the corresponding rotating member 550 to rotate relative to the base 53 about the first axis L1 and one of the connecting rod members 562 to rotate relative to the base 53 about the second axis L2 respectively. The rotation of the one connecting rod member 562 drives the other connecting rod member 562 to rotate relative to the base 53 synchronously about the corresponding second axis L2 through the gear combination 564. The two rotating shafts 561 rotate relative to the base 53 synchronously about the two second axes L2 respectively, and the two adjusting members 54 rotate synchronously with the two rotating shafts 561 respectively. The rotation directions of the two adjusting members 54 are opposite to drive the adjusting members 54 to slide along the guide posts 591 to drive the first redundant portion 401 of the flexible circuit board 400 to bend into the accommodating portion 590 or flatten the first redundant portion 401.

[0080] A second receiving space 580 is formed between one side of the back shell 59 and one of the support members 58, and another second receiving space 580 is formed between the opposite side of the back shell 59 and the other support member 58; when the two side support members 523 are in a flattened state, the two rotating mechanisms 55 are in a flattened state, each drive shaft 5601 is positioned at the corresponding first positioning section 5401, and the adjusting member 54 is located on the side away from the middle support member 521 to drive the first redundant portion 401 to bend away from the middle support member 521 and be redundant into the accommodating portion 590, and the two second redundant portions 404 of the flexible circuit board 400 are respectively accommodated in the second receiving spaces 580 on the opposite sides of the back shell 59; the fronts of the two side support members 523 and the middle support member 521 are coplanar to prevent the side support members 523 from being bent back relative to the middle support member 521. When the two side support members 523 are in a fully bent state, the two rotating mechanisms 55 are in a folded state, each drive shaft 5601 is positioned at the corresponding second positioning section 5403, the adjusting member 54 is located on the side close to the middle support member 521, and the two support members 58 respectively tension the two fixing portions 406 of the flexible circuit board 400, so that the second redundant portions 404 of the flexible circuit board 400 are straightened to drive the first redundant portion 401 to be fully flattened, and the first redundancy is clamped between the adjusting member 54 and the middle support member 521, the folding device 50 remains in a fully bent state, and the fronts of the two side support members 523 and the middle support member 521 enclose a water droplet shape.

[0081] Please also refer to Figures 1 - 3 and Figures 20 - 24 and place the installed folding device 50 between the two frames 21. The connecting members 555 on the opposite sides of the folding device 50 are respectively accommodated in the positioning grooves 218 of the two frames 21. The connecting members 555 are fixedly connected to the corresponding frames 21, and the support bars 582 of the two support members 58 are respectively positioned in the positioning grooves 218 of the two frames 21. When the folding housing 20 is in a flattened state, the receiving grooves 210 of the two frames 21 are respectively communicated with the second receiving spaces 580 on the opposite sides of the back shell 59, the two second redundant portions 404 are respectively accommodated in the two second receiving spaces 580, and the first redundant portion 401 is redundant in the accommodating portion 590. The fronts of the two frames 21, the front of the middle support member 521 and the fronts of the two side support members 523 are coplanar. The back of the flexible screen 30 is connected to the fronts of the two frames 21 and the front of the folding device 50, the bendable area 31 faces the folding device 50, and the two non-bendable areas 33 respectively face the bendable mechanisms on the fronts of the two frames 21.

[0082] Please also refer to Figure 1 and Figures 25 to 31, when bending the electronic device 100, a bending force is applied to at least one of the two frames 21 of the electronic device 100, so that the rotating mechanism 55 connected to the two frames 21 rotates in a direction close to each other, and the folding device 50 is bent through the two folding assisting components 51. The bendable area 31 bends along with the support mechanism 52, and the first redundant part 401 and the second redundant part 404 of the flexible circuit board 400 are straightened as the folding housing 20 folds. Specifically, for example, when a bending force is applied to one frame 21, the one frame 21 drives the corresponding rotating mechanism 55 to rotate relative to the base 53 toward the side close to the flexible screen 30; so as to drive the corresponding connecting rod 562 to rotate relative to the base 53 toward the side close to the flexible screen 30 around the second axis of the corresponding rotating shaft 561. At the same time, the guide rail 5620 of the connecting rod 562 slides in the guide chute 5550 of the corresponding connecting member 555, and the sleeve 5622, the rotating shaft 561, the driving gear 5641 and the pushing member 572 of the connecting rod 562 rotate around the second axis of the corresponding rotating shaft 561. The rotating driving gear 5641 drives another driving gear 5641 to rotate through the synchronous gear 5643, and then drives the corresponding rotating shaft 561, the sleeve 5622, the pushing member 572 and the connecting rod 5623 to rotate, so that the two connecting rods 562 of the linkage mechanism 56 approach each other synchronously; the two rotating shafts 561 rotate synchronously and reversely, and the two adjusting members 54 rotate synchronously and reversely along with the two rotating shafts 561 respectively, so that the driving shaft 5601 of each adjusting member 54 slides and rotates from the first positioning section 5401 to the second positioning section 5403 in the corresponding adjusting groove 540, so as to drive the adjusting member 54 to slide toward the middle support member 521. At the same time, the two support members 58 respectively pull the two fixing parts 406, so that the two second redundant parts 404 and the first redundant part 401 are both straightened; at the same time, the two cams 5720 respectively rotate and push the two abutting cams 5731, the holding member 573 slides along the axial direction of the rotating shaft 561 and presses the elastic member 575, and the elastic member 575 elastically pushes the abutting member 576 so that the friction member 5770 is clamped between the gasket 578 and the abutting member 576 and the friction member 5770 is clamped between the gasket 578 and the buckle 579, and the friction member 5770 and the driving member 560 rotate relative to the gasket 578 along with the corresponding rotating shaft 561.During the bending process of the linkage mechanism 56, the first rotating part 552 of the rotating part 550 rotates relative to the base 53 through the cooperation of the arc track and the corresponding arc groove. The second rotating part 553 of the rotating part 550 is rotatably connected to the corresponding connecting part 555 along the corresponding rotating shaft 551. The second positioning section 5237b of the adjusting shaft 5628 slides and rotates to the first positioning section 5237a in the adjusting groove 5237. The two link members 562 rotate along the axis lines of the corresponding rotating shafts 561 respectively and approach each other, so as to realize the mutual approach of the two side support members 523, making the folding device 50 in a bent state. The bendable area 31 of the flexible screen 30 bends along with the folding device 50 until the fronts of the two non-bendable areas 33 of the flexible screen 30 are mutually attached. The bendable area 31 is bent into a water droplet shape, thereby realizing the seamless folding of the electronic device 100.

[0083] During the bending process of the electronic device 100, the sum of the frictional torque between the cam 5720 and the abutting cam 5731, the frictional resistance between the friction member 5770 and the abutting member 576 and the gasket 578, and the frictional resistance between the driving member 560 and the gasket 578 can limit the rebound of the flexible screen 30, so that the side support member 523 is positioned at a specific angle relative to the middle support member 521, and the two frames 21 can be limited at a specific angle between 180 degrees and 0 degrees. When the two frames 21 are flattened and limited at 180 degrees, that is, the two non-bendable areas 33 of the flexible screen 30 are coplanar, the adjusting member 54 is far from the middle support member 521, the first redundant part 401 is redundant in the accommodating part 590, and the two second redundant parts 404 are respectively received in the two second receiving spaces 580; when the two frames 21 are folded and limited at 0 degrees, the bendable area 31 of the flexible screen 30 is bent into a water droplet shape, reducing the duty ratio of the bendable area 31 after bending, so as to reduce the overall thickness of the electronic device 100. The adjusting member 54 approaches the middle support member 521, and the first redundant part 401 and the two second redundant parts 404 are respectively straightened.

[0084] In other bending methods of the electronic device 100, a bending force can also be applied to the two frames 21 at the same time. The two frames 21 respectively drive the two side support members 523 to rotate relative to the side close to the flexible screen 30, and the electronic device 100 is bent through the folding device 50.

[0085] When it is necessary to flatten the electronic device 100, pull out a frame body 21 outward, so that two rotating mechanisms 55 connected to the two frame bodies 21 rotate in a direction away from each other, and the folding device 50 is flattened through the two folding assisting components 51. The bendable area 31 is flattened along with the support mechanism 52, and the first redundant part 401 of the flexible circuit board 400 is pulled into the accommodating part 590 by the adjusting member 54. At the same time, the two second redundant parts 404 are respectively received in the two second receiving spaces 580.Specifically, an outward pulling force is applied to a housing 21 of the electronic device 100. The housing 21 drives the corresponding rotating mechanism 55 to rotate relative to the base 53 toward the side away from the flexible screen 30, causing the guide rail 5620 of the link member 562 to slide in the guide chute 5550 of the corresponding connecting member 555. The sleeve 5622, the rotating shaft 561, the driving gear 5641, and the pushing member 572 of the link member 562 rotate along the second axis of the corresponding rotating shaft 561. The rotating driving gear 5641 drives another driving gear 5641 to rotate through the synchronous gear 5643. The rotation of the other driving gear 5641 drives the corresponding rotating shaft 561, the sleeve 5622, the pushing member 572, and the link 5623 to rotate along the axis of the corresponding rotating shaft 561. The guide rails 5620 of the two link members 562 slide in the guide chutes 5550 of the corresponding connecting members 555, so that the two link members 562 of the linkage mechanism 56 move away from each other synchronously; the two rotating shafts 561 rotate in opposite directions synchronously, and the two adjusting members 54 rotate in opposite directions synchronously with the two rotating shafts 561 respectively, so that each driving shaft 5601 slides in the second positioning section 5403 of the corresponding adjusting groove 540 and rotates to the first positioning section 5401 to drive the adjusting member 54 to slide away from the middle support member 521. The first redundant portion 401 redundantly moves to the accommodating portion 590 with the adjusting member 54. At the same time, the two second redundant portions 404 are respectively accommodated in the two second accommodating spaces 580; at the same time, the two cams 5720 respectively rotate and push the two abutting cams 5731. The elastic member 575 elastically abuts between the abutting member 576 and the abutting member 573, so that the abutting member 576 slides along the axial direction of the rotating shaft 561. The friction member 5770 is clamped between the gasket 578 and the abutting member 576, and the driving member 560 is clamped between the gasket 578 and the buckle 579. The friction member 5770 and the driving member 560 rotate relative to the gasket 578 and the abutting member 576 with the corresponding rotating shaft 561; during the flattening process of the linkage mechanism 56, the first rotating portion 552 of the rotating member 550 rotates relative to the base 53, and the second rotating portion 553 of the rotating member 550 is rotatably connected to the corresponding connecting member 555. The adjusting shaft 5628 slides in the first positioning section 5237a of the adjusting groove 5237 and rotates to the second positioning section 5237b. At the same time, the two link members 562 rotate along the axis of the corresponding rotating shaft 561 and move away from each other respectively to realize the mutual separation of the two side support members 523, so that the folding device 50 is unfolded, and the bendable area 31 of the flexible screen 30 is unfolded with the folding device 50 until the flexible screen 30 is flattened.

[0086] During the flattening process of the electronic device 100, the frictional torques between the two cams 5720 and the two abutting cams 5731 respectively, the frictional resistance between the friction member 5770 and the abutting member 576 and the gasket 578, and the frictional torque between the driving member 560 and the gasket 578 can limit the rebound of the flexible screen 30, so that the side support member 523 is positioned at a specific angle relative to the middle support member 521, and can limit the two frames 21 at a specific angle between 0 degrees and 180 degrees. When the electronic device 100 is in the flattened state, the first redundant portion 401 is received in the receiving portion 590, and the two second redundant portions 404 are respectively bent and received in the two second receiving spaces 580.

[0087] In other flattening methods of the electronic device 100, a force that pulls the two frames 21 outward can also be applied simultaneously. The two frames 21 respectively drive the base 53 to rotate away from each other relative to the rotating mechanisms 55 on both sides, so as to drive the two link members 562 on both sides of the base 53 to rotate away from each other, causing the two side support members 523 to rotate away from the flexible screen 30, and realizing the unfolding of the electronic device 100 through the folding device 50.

[0088] During the flattening process of the folding device 50 of the electronic device 100 of the present invention, the rotating shafts 561 corresponding to the two adjusting members 54 rotate synchronously, so that each driving shaft 5601 slides and rotates to the first positioning section 5401 in the corresponding adjusting groove 540, so as to drive the adjusting member 54 to slide away from the middle support member 521. The first redundant portion 401 of the flexible circuit board 400 is received in the receiving portion 590 as the adjusting member 54 bends. At the same time, the two second redundant portions 404 of the flexible circuit board 400 are respectively bent and received in the corresponding second receiving spaces 580, which can effectively solve the problem that the redundant segments of the flexible circuit board cannot be completely received in the prior art, make the folding or unfolding of the electronic device 100 smoother, and improve the user experience; secondly, the electronic device 100 realizes synchronous bending or unfolding through the folding assist assembly 51. There is a frictional torque between the cam 5720 and the abutting cam 5731, and the friction member 5770 and the driving member 560 also have frictional resistance; the electronic device 100 can be stably limited at a specific angle between 0 degrees and 180 degrees during bending, realizing the hovering function of the whole machine.

[0089] The above is the implementation manner of the embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the embodiments of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. A folding device, characterized in that, The folding device includes: a back shell provided with a receiving portion; a base positioned on the back shell; a linkage mechanism including a rotating shaft and a driving member connected to the rotating shaft, the rotating shaft being rotatably connected to the base, and the driving member being capable of rotating together with the rotating shaft; and an adjusting member received in the receiving portion, the driving member being connected to the adjusting member, and the driving member being configured to drive the adjusting member to slide relative to the back shell so as to adjust the shape of a flexible circuit board connected to the adjusting member; wherein when the folding device is in a flattened state, the adjusting member is positioned at a first position relative to the back shell, such that a first redundant portion of the flexible circuit board is received in the receiving portion; and when the folding device is in a folded state, the adjusting member is positioned at a second position relative to the back shell, such that the first redundant portion of the flexible circuit board is in a flattened state.

2. The folding device according to claim 1, characterized in that, The driving member and the adjusting member are connected by the cooperation of a driving shaft and an adjusting groove, the driving shaft is provided on one of the driving member and the adjusting member, the adjusting groove is provided on the other of the driving member and the adjusting member, and the axis of the driving shaft is parallel and spaced from the axis of the rotating shaft.

3. The folding device according to claim 2, characterized in that, The extending direction of the adjusting groove intersects with the sliding direction of the adjusting member relative to the back shell, and the adjusting groove includes a first positioning section and a second positioning section respectively located at opposite ends thereof; when the folding device is in a flattened state, the driving shaft is located in the first positioning section, and the first redundant portion bends towards the back shell and is received in the receiving portion; when the folding device is in a folded state, the driving shaft is located in the second positioning section.

4. The folding device according to claim 2, wherein, The driving member includes a connecting portion fixedly connected to the rotating shaft, one end of the driving shaft is connected to the connecting portion, and the end of the driving shaft away from the connecting portion penetrates through the adjusting groove.

5. The folding device according to claim 2, wherein, The adjusting member and the back shell are connected by the cooperation of a guiding slide post and a guiding slide hole, the guiding slide post is slidably inserted into the guiding slide hole, the guiding slide post is provided on one of the back shell and the adjusting member, the guiding slide hole is provided on the other of the back shell and the adjusting member, and the axial direction of the guiding slide post is parallel to the sliding direction of the adjusting member.

6. The folding device according to claim 1, wherein, The back shell includes a back plate and side walls connected to opposite sides of the back plate, the back plate and the two side walls enclose the receiving portion, the adjusting member has a first distance from the back plate at the first position, and the adjusting member has a second distance from the back plate at the second position, and the first distance is less than the second distance.

7. The folding device according to claim 1, characterized in that, The adjusting member is provided with a fixing groove, and an adhesive member is provided in the fixing groove, and the first redundant portion of the flexible circuit board is connected to the adhesive member.

8. The folding device according to claim 2, wherein The linkage mechanism includes two parallel and spaced rotating shafts, each rotating shaft is connected with a driving member, and each driving member includes the driving shaft; the adjusting member is provided with two adjusting grooves, the extending direction of the adjusting groove intersects with the sliding direction of the adjusting member relative to the back shell, and the two driving shafts are respectively slidably and rotatably received in the two adjusting grooves.

9. The folding device according to claim 8, characterized in that, The extending direction of the adjustment groove is perpendicular to the sliding direction of the adjustment member relative to the back shell; the plane where the axes of the two rotating shafts are located is parallel to the plane where the axes of the two driving shafts are located.

10. The folding device according to claim 9, characterized in that, The adjustment member includes a fixing plate and adjustment strips provided on opposite sides of the fixing plate. Each adjustment strip is provided with the adjustment groove, and the two adjustment grooves are parallel to each other.

11. The folding device according to claim 8, wherein, It further includes a support mechanism. The support mechanism includes a middle support member connected to the base. The middle support member covers the adjustment member, and the flexible circuit board is located between the adjustment member and the middle support member; when the folding device is in a flattened state, the first redundant portion of the flexible circuit board bends away from the middle support member and is redundant in the accommodation portion; when the folding device is in a folded state, the first redundant portion of the flexible circuit board is clamped between the adjustment member and the middle support member.

12. The folding device according to claim 11, characterized in that, The linkage mechanism further includes two link members and a gear combination. One of the link members is connected to one of the rotating shafts, and the other link member is connected to the other rotating shaft. The gear combination is provided between the two link members. Each link member is provided with a driving gear, and the two driving gears are respectively engaged with the gear combination.

13. The folding device according to claim 12, characterized in that, It further includes a rotating mechanism. The rotating mechanisms are respectively provided on opposite sides of the base. The rotating mechanism includes a rotating member and a connecting member rotatably connected to the rotating member. One end of the rotating member away from the connecting member is rotatably connected to the base. One end of one of the link members away from the base is slidably connected to one of the connecting members, and one end of the other link member away from the base is slidably connected to the other connecting member.

14. The folding device according to claim 13, wherein, The support mechanism further includes two support members. One of the support members is connected to one of the connecting members, and the other support member is connected to the other connecting member; when the two rotating mechanisms are in a flattened state, a second storage space is formed between each support member and the back shell, and the second storage space is used to accommodate the second redundant portion of the flexible circuit board. The second redundant portion is located on both sides of the first redundant portion.

15. The folding device according to claim 14, characterized in that, The support strip is provided with a support groove. The fixing portion of the flexible circuit board is connected to the side of the second redundant portion away from the first redundant portion, and the fixing portion is connected to the support groove of the support member through a positioning member.

16. The folding device according to claim 14, wherein Wire grooves are respectively provided on opposite sides of the back shell. Each wire groove communicates with the corresponding second storage space and the accommodation portion, and the flexible circuit board can slidably pass through the wire groove.

17. An electronic device, characterized in that, The electronic device includes a folding device, a flexible circuit board, a flexible screen, and two frames as described in any one of claims 1-16. The two frames are respectively connected to opposite sides of the folding device. The flexible screen is arranged on the two frames and the folding device, and the flexible circuit board is connected to the adjustment member of the folding device.

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