Folding device, folding shell and electronic equipment

Abstract

The invention provides a folding device which comprises a back shell, a base, a linkage mechanism, a supporting mechanism and a storage piece, and the base is positioned on the back shell; the linkage mechanism comprises a rotating shaft, the rotating shaft is rotationally connected to the base, the supporting mechanism comprises a middle supporting piece, the middle supporting piece is connected to the back shell, and the middle supporting piece and the back shell define a first containing space used for containing the flexible circuit board; the storage part is connected to the rotating shaft, the flexible circuit board is connected to the storage part, the storage part is contained in the first storage space, and the storage part can rotate along with the rotating shaft so that the flexible circuit board can be wound around the storage part. The invention further provides a folding shell provided with the folding device and electronic equipment.

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, a folding housing provided with the folding device, and an electronic device provided with the folding housing. Background Art

[0002] Currently, 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 electrically connect the electronic devices in the two frames, an FPC generally passes through the hinge mechanism. When the folding electronic product is bent from a flattened state to a 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 is getting 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, a folding housing provided with the folding device, and an electronic device provided with the folding housing.

[0004] A folding device provided by the present application includes a back shell, a base, a linkage mechanism, a support mechanism, and a receiving member. The base is positioned on the back shell. The linkage mechanism includes a rotating shaft, and the rotating shaft is rotatably connected to the base. The support mechanism includes a middle support member, and the middle support member is connected to the back shell. The middle support member and the back shell define a first receiving space for accommodating a flexible circuit board. The receiving member is connected to the rotating shaft, the flexible circuit board is connected to the receiving member, and the receiving member is accommodated in the first receiving space. The receiving member can rotate with the rotating shaft so that the flexible circuit board is wound around the receiving member.

[0005] The present application also provides a folding housing, which includes a folding device and two frames. The folding device includes a back shell, a base, a linkage mechanism, a support mechanism and a receiving member. The base is positioned on the back shell. The linkage mechanism includes a rotating shaft, and the rotating shaft is rotatably connected to the base. The support mechanism includes a middle support member, and the middle support member is connected to the back shell. The middle support member and the back shell define a first receiving space for accommodating a flexible circuit board. The receiving member is connected to the rotating shaft, and the flexible circuit board is connected to the receiving member. The receiving member is accommodated in the first receiving space, and the receiving member can rotate with the rotating shaft so that the flexible circuit board is wound around the receiving member. The folding device is located between the two frames, and the two frames are respectively connected to the connecting members on the opposite sides of the folding device.

[0006] The present application also provides an electronic device, which includes a flexible screen and a folding housing. The folding housing includes a folding device and two frames. The folding device includes a back shell, a base, a linkage mechanism, a support mechanism and a receiving member. The base is positioned on the back shell. The linkage mechanism includes a rotating shaft, and the rotating shaft is rotatably connected to the base. The support mechanism includes a middle support member, and the middle support member is connected to the back shell. The middle support member and the back shell define a first receiving space for accommodating a flexible circuit board. The receiving member is connected to the rotating shaft, and the flexible circuit board is connected to the receiving member. The receiving member is accommodated in the first receiving space, and the receiving member can rotate with the rotating shaft so that the flexible circuit board is wound around the receiving member. The folding device is located between the two frames, and the two frames are respectively connected to the connecting members on the opposite sides of the folding device. The flexible screen is disposed on the folding housing.

[0007] In the folding device of the electronic device of the present application, the middle support member and the back shell enclose a first receiving space. The receiving member is connected to one end of the rotating shaft and can rotate together with the rotating shaft. The receiving member is accommodated in the first receiving space, and the flexible circuit board is connected to the receiving member. During the flattening process of the electronic device through the folding device, the rotating shaft rotates relative to the base around its axis to drive the receiving member to rotate synchronously, so that the flexible circuit board is wound around the receiving member and accommodated in the first receiving space, which can effectively solve the problem that the redundant section of the flexible circuit board cannot be completely accommodated in the prior art, make the folding or unfolding of the electronic device smoother, and improve the user experience. Description of the Drawings

[0008] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for the implementation will be briefly introduced below. Obviously, the accompanying drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other accompanying drawings can be obtained based on these drawings without creative efforts.

[0009] Figure 1 It is a three-dimensional structural schematic diagram of an electronic device in an embodiment of the present application;

[0010] Figure 2 is Figure 1 a three-dimensional structural exploded view of the electronic device in;

[0011] Figure 3 is Figure 2 a further three-dimensional structural exploded view of the electronic device in;

[0012] Figure 4 is Figure 3 a three-dimensional structural schematic diagram of the folding device in;

[0013] Figure 5 is Figure 4 a three-dimensional structural schematic diagram of the folding device from another perspective in;

[0014] Figure 6 is Figure 4 a three-dimensional structural exploded view of the folding device in;

[0015] Figure 7 is Figure 6 a further three-dimensional structural exploded view of the folding device in;

[0016] Figure 8 is Figure 7 a three-dimensional structural schematic diagram of the folding device from another perspective in;

[0017] Figure 9 is Figure 7 a further three-dimensional structural exploded view of the folding device in;

[0018] Figure 10 is Figure 8 a further three-dimensional structural exploded view of the folding device in;

[0019] Figure 11 is Figure 9 a three-dimensional structural exploded view of the storage member, flexible circuit board and support member in;

[0020] Figure 12 is Figure 10 a three-dimensional structural exploded view of the storage member, flexible circuit board and support member in;

[0021] Figure 13 is Figure 9 a schematic exploded perspective view of one of the folding assisting components in

[0022] Figure 14 is Figure 13 a schematic exploded perspective view of the base and the rotating mechanism in

[0023] Figure 15 is Figure 14 a schematic perspective view of the base and the rotating mechanism in from another perspective

[0024] Figure 16 is Figure 13 a schematic enlarged perspective view of the linkage mechanism and the limiting mechanism in

[0025] Figure 17 is Figure 16 a schematic perspective view of the linkage mechanism and the limiting mechanism in from another perspective

[0026] Figure 18 is Figure 16 a schematic exploded perspective view of the linkage mechanism and the limiting mechanism in

[0027] Figure 19 is Figure 18 a schematic perspective view of the linkage mechanism and the limiting mechanism in from another perspective

[0028] Figure 20 is Figure 2 one of the schematic cross-sectional views of the folding housing in

[0029] Figure 21 is Figure 2 another schematic cross-sectional view of the folding housing in

[0030] Figure 22 is Figure 21 a cross-sectional view of the folding housing in

[0031] Figure 23 is Figure 1 a schematic perspective view of the fully folded state of the electronic device in

[0032] Figure 24 is Figure 23 a schematic perspective view of the folding device in

[0033] Figure 25 is Figure 24 a schematic perspective view of the folding device in from another perspective

[0034] Figure 26 is Figure 23 one of the schematic cross-sectional views of the electronic device in

[0035] Figure 27 is Figure 23 another perspective cross-sectional view of the electronic device in

[0036] Figure 28 is Figure 27 a cross-sectional view of the electronic device in

[0037] Figure 29 is Figure 23 yet another perspective cross-sectional view of the electronic device in

[0038] Figure 30 is Figure 29 a cross-sectional view of the electronic device in

[0039] Description of main reference numerals:

[0040] 100, Electronic device; 20, Folding housing; 21, Frame; 210, Receiving groove; 211, First front surface; 212, First back surface; 214, Side surface; 215, End surface; 216, Positioning groove; 217, Mounting portion; 218, Positioning groove; 30, Flexible screen; 31, Bendable area; 33, Non-bendable area; 400, Flexible circuit board; 401, First redundant portion; 402, Positioning portion; 404, Second redundant portion; 406, Fixing portion; 408, Fixing member; 50, Folding device; 51, Folding assist component; 52, Support mechanism; 521, Middle support member; 5210, Top abutting portion; 5212, Connecting hole; 523, Side support member; 5230, Support plate; 5232, Connecting area; 5233, First connecting portion; 5234, Rotating groove; 5236, Second connecting portion; 5237, Adjusting groove; 5237a, First positioning section; 5237b, Second positioning section; 53, Base; 531, First housing; 532, Arc groove; 530, Receiving groove; 531, Second housing; 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, Connecting hole; 537, Fixing hole; 54, Receiving member; 541, Connecting portion; 5412, Clamping hole; 543, Receiving portion; 545, Through groove; 55, Rotating mechanism; 550, Rotating member; 551, Rotating shaft; 552, First rotating portion; 5522, Arc track; 553, Second rotating portion; 5531, Lug; 5533, Rotating cylinder; 555, Connecting member; 5550, Guide sliding groove; 5552, Receiving groove; 5553, Second connecting cylinder; 5554, Avoidance groove; 5556, Rotating track; 56, Linkage mechanism; 561, Rotating shaft; 5611, Clamping block; 5610, Shaft body; 5612, Connecting cap; 5613, Positioning portion; 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, First adjusting shaft; 564, Gear combination; 5641, Driving gear; 5643, Synchronous gear; 5644, Rotating shaft; 5646, Gear ring; 565, Fixing member; 5652, First guide sliding hole; 5654, First connecting hole; 5656, Positioning portion; 5657, Positioning rod; 57, Limiting mechanism; 572, Pushing member; 5720, Cam; 5724, First protruding portion; 5725, First recessed portion; 573, Holding member; 5730, First sliding cylinder; 5731, Abutting cam; 5732, Connecting strip; 5734, Second protruding portion; 5735, Second recessed portion; 5736, Second connecting hole; 575, Elastic member; 576, Positioning member; 5760, Second sliding cylinder; 5761, Guide sliding piece; 5763, Positioning portion;5765, the second guide sliding hole; 5767, the avoidance hole; 5768, the first anti-sliding part; 577, the friction assembly; 5770, the first friction member; 5772, the first positioning hole; 5774, the second anti-sliding part; 5775, the second friction member; 5776, the second positioning hole; 5778, the fourth anti-sliding part; 578, the gasket; 5782, the through hole; 5784, the third anti-sliding part; 579, the buckle; 58, the support member; 580, the second storage space; 582, the support bar; 5821, the support groove; 584, the connecting piece; 5842, the connecting hole; 59, the back shell; 590, the back plate; 591, the first storage space; 592, the locking part; 593, the support part; 5930, the positioning groove; 594, the connecting column; 5942, the locking hole; 595, the side plate; 5951, the wire groove; Detailed implementation manners

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] In addition, the descriptions of the following embodiments refer to the attached drawings for exemplifying specific embodiments in which the present application can be implemented. The directional terms mentioned in the present application, for example, "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "side surface", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer description 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 thus cannot be construed as a limitation to the present application.

[0043] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "set on..." should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside 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 specific situations.

[0044] Please refer to 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, and 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. Opposite sides of the folding device 50 are respectively connected to the two frame bodies 21. The flexible screen 30 is disposed on the front surfaces of the two frame bodies 21 and the front surface of the folding device 50. The flexible screen 30 includes a bendable area 31 facing the front surface 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 front surfaces 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 assistance component 51, a support mechanism 52, and a back shell 59. The support mechanism 52 is connected to the front surface of the folding assistance component 51, and the back shell 59 is connected to the back surface of the folding assistance component 51. The folding assistance component 51 includes a base 53, a receiving member 54, a rotating mechanism 55, a linkage mechanism 56, and a limiting mechanism 57. The base 53 is positioned on the front surface of the back shell 59. The linkage mechanism 56 includes a rotating shaft 561, and the rotating shaft 561 is rotatably connected to the base 53. The support mechanism 52 includes a middle support member 521. The middle support member 521 is connected to the base 53. The middle support member 521 and the back shell 59 define a first receiving space 591 for accommodating a flexible circuit board 400. The flexible circuit board 400 is clamped between the back shell 59 and the middle support member 521. The flexible circuit board 400 passes through between the support mechanism 52 and the back shell 59. Electronic components such as a circuit board and a battery are disposed in the frame body 21. The flexible circuit board 400 is used for electrically connecting the electronic components in the two frame bodies. The receiving member 54 is connected to one end of the rotating shaft 561. The flexible circuit board 400 is connected to the receiving member 54. The receiving member 54 is accommodated in the first receiving space 591. The receiving member 54 can rotate with the rotating shaft 561, so that the flexible circuit board 400 is wound around the receiving member 54. When the electronic device 100 is in a flattened state, the flexible circuit board 400 is partially wound around the receiving member 54 and accommodated in the first receiving space 591. When the electronic device 100 is in a fully folded state, the flexible circuit board 400 is disengaged from the winding around the receiving member 54 and the flexible circuit board 400 is kept in a straightened state. During the process that the electronic device 100 is folded from the flattened state to the fully folded state through the folding device 50, the rotating shaft 561 rotates relative to the base 53 around its axis in a first rotation direction to drive the receiving member 54 to rotate synchronously in the first rotation direction, so that the flexible circuit board 400 is disengaged from the winding around the receiving member 54 and is straightened. During the process that the electronic device 100 is unfolded from the fully folded state to the flattened state through the folding device 50, the rotating shaft 561 rotates relative to the base 53 around its axis in a second rotation direction to drive the receiving member 54 to rotate synchronously in the second rotation direction, so that the flexible circuit board 400 is wound around the receiving member 54 and accommodated in the first receiving space 591.

[0045] It should be noted that the "front" refers to the surface facing the same direction as the light-emitting surface of the flexible screen 30, and the "back" refers to the surface facing away from the light-emitting surface of the flexible screen 30. The "specific angle" refers to the angle between the fronts of the two frames 21 within the range of 0 degrees to 180 degrees. The electronic device 100 is, for example, but not limited to, mobile phones, tablet computers, monitors, liquid crystal panels, OLED panels, TVs, smart watches, VR head-mounted displays, in-vehicle displays, and other products and components with display functions. 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 the direct connection between A and B or the 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] The middle support member 521 of the folding device 50 of the electronic device 100 of the present invention and the back shell 59 enclose a first storage space 591. The storage member 54 is connected to one end of the rotating shaft 561 and can rotate together with the rotating shaft 561. The storage member 54 is accommodated in the first storage space 591, and the flexible circuit board 400 is connected to the storage member 54. During the flattening process of the electronic device 100 through the folding device 50, the rotating shaft 561 rotates around its axis relative to the base 53 to drive the storage member 54 to rotate synchronously, so that the flexible circuit board 400 is wound around the storage member 54 and accommodated in the first storage space 591, effectively solving the problem that the redundant section of the flexible circuit board cannot be completely stored in the prior art, making the folding or unfolding of the electronic device 100 smoother and improving the user experience.

[0047] The folding assistance component 51 includes two rotating mechanisms 55. 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 away 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 away from the connecting member 555 is rotatably connected to the opposite side of the base 53. At least one folding assistance component 51 is provided on the back of the support mechanism 52. In this embodiment, folding assistance components 51 are respectively provided at opposite ends on the back of the support mechanism 52. In other embodiments, more than three folding assistance components 51 are provided on the back of the support mechanism 52, and the more than three folding assistance components 51 are arranged along the length direction of the support mechanism 52.

[0048] The housing 21 includes a first front surface 211, a first back surface 212, opposite side surfaces 214, and opposite end surfaces 215. On one side of the first front surface 211 close to the folding device 50, there is an installation groove 216. The opposite ends of the installation groove 216 respectively extend 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. At the opposite ends of the installation groove 216 in the housing 21, there are respectively installation parts 217. At the bottom surface of the installation groove 216 in the housing 21, there is a storage groove 210 communicating with the first storage space 591. When the two housings 21 are in a flattened state, the first storage space 591 stores the first redundant part 401 of the flexible circuit board 400, and the storage groove 210 stores the second redundant part 403 of the flexible circuit board 400. Optionally, the housing 21 further has 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 housing 21.

[0049] As Figures 6 - 10 shown, on the side of the middle support member 521 facing the back shell 59, there is a top support portion 5210. Specifically, the middle support member 521 is a strip-shaped connecting piece, and the top support portion 5210 is a rectangular block provided in the middle of the back surface of the connecting piece. At the opposite ends of the front surface of the connecting piece, there are respectively connecting holes 5212. The top support portion 5210 is located between the two connecting holes 5212. 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. The support mechanism 52 further includes two side support members 523 located on the opposite sides of the middle support member 521. One side support member 523 is movably connected to the rotation mechanism 55 and the linkage mechanism 56 on one side of the base 53, and the other side support member 523 is movably connected to the rotation 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 rotation mechanism 55 and the linkage mechanism 56. The back surface of the flexible screen 30 is attached to the front surface of the middle support member 521 and the front surfaces of the side support members 523. The side rotation mechanism 55 on one side of the back shell 59 rotates relative to the base 53 and drives the side support member 523 on the other side 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 support mechanism 52 and complete the synchronous folding or synchronous unfolding of the folding device 50.

[0050] 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 area 5232 is used to connect to the corresponding rotating mechanism 55. Each connection area 5232 includes a pair of first connection portions 5233 and a second connection portion 5236 that are spaced apart from each other, and the second connection portion 5236 is located between the pair of first connection portions 5233. Each pair of first connection portions 5233 is provided with a pair of arc-shaped rotating grooves 5234, and the axes of the pair of rotating grooves 5234 are collinear. The rotating groove 5234 is located at one 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 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.

[0051] Please refer to Figures 7 - 12 , the storage member 54 includes a connection portion 541 and a storage portion 543. The connection portion 541 is connected to the rotating shaft 561, the storage portion 543 is connected to one end of the connection portion 541 away from the rotating shaft 561, the flexible circuit board 400 is connected to the storage portion 543, and the rotation axis of the storage member 54 is collinear with the axis of the rotating shaft 561. Further, the storage portion 543 is provided with a through groove 545, and the flexible circuit board 400 passes through the through groove 545. In this embodiment, the storage portion 543 is a storage rod, and connection portions 541 are respectively provided at opposite ends of the storage portion 543. The storage member 54 is located between two folding assist components 51. One connection portion 541 is connected to the end of the rotating shaft 561 of one folding assist component 51, and the other connection portion 541 is connected to the end of the rotating shaft 561 of the other folding assist component 51. Optionally, when the connection portion 541 is connected to the rotating shaft 561, the length direction of the storage rod is parallel to the axial direction of the rotating shaft 561, the rotation axis of the storage rod is collinear with the axis of the rotating shaft 561, the through groove 545 is provided in the storage rod, and the opposite sides of the through groove 545 respectively penetrate the outer peripheral surface of the storage rod. The length direction of the through groove 545 is parallel to the axial direction of the rotating shaft 561. Optionally, when the storage member 54 rotates around the axis of the rotating shaft 561 along the first rotation direction with the rotating shaft 561, the flexible circuit board 400 is wound around the storage portion 543; when the storage member 54 rotates around the axis of the rotating shaft 561 along the second rotation direction with the rotating shaft 561, the flexible circuit board 400 is disengaged from the winding on the storage portion 543, and the first rotation direction is opposite to the second rotation direction.

[0052] Optionally, the connection part 541 and the rotating shaft 561 are connected through the cooperation of a clamping hole and a clamping block. The clamping hole is provided on one of the connection part 541 and the rotating shaft 561, and the clamping block is provided on the other of the connection part 541 and the rotating shaft 561. In this embodiment, a clamping hole 5412 is provided on the end face of the connection part 541 away from the connection part 541, and a clamping block 5611 is provided at the end of the rotating shaft 561. The clamping block 5611 is positioned in the clamping hole 5412. The clamping hole 5412 is a non-circular hole, and the clamping block 5611 is a non-circular block. That is, the clamping hole 5412 can be, but is not limited to, a waist-shaped hole, a triangular hole, a rectangular hole, a polygonal hole or an irregular-shaped hole, etc., and the clamping block 5611 can be, but is not limited to, a waist-shaped block, a triangular block, a rectangular block, a polygonal block or an irregular-shaped block, etc. In this embodiment, the clamping hole 5412 is a waist-shaped hole, and the clamping block 5611 is a waist-shaped block.

[0053] In other embodiments, a clamping block is provided on the end face of the connection part 541 away from the connection part 541, a clamping hole is provided at the end of the rotating shaft 561, and the clamping block is positioned in the clamping hole. In other embodiments, the connection part 541 and the end of the rotating shaft 561 can be connected by, but are not limited to, gluing, welding and other methods.

[0054] As Figure 11 and Figure 12 shown, the flexible circuit board 400 includes a positioning part 402 at its middle, two first redundant parts 401, two second redundant parts 404 and two fixing parts 406. The two first redundant parts 401 are respectively connected to opposite sides of the positioning part 402. One of the second redundant parts 404 is connected to the side of the first redundant part 401 away from the positioning part 402, and the other second redundant part 404 is connected to the side of the other first redundant part 401 away from the positioning part 402. One of the fixing parts 406 is connected to the side of one of the second redundant parts 404 away from the first redundant part 401, and the other fixing part 406 is connected to the side of the other second redundant part 404 away from the first redundant part 401.

[0055] As Figures 7 - 10As shown, the inner surface of the back shell 59 is provided with a support portion 593. When the middle support member 521 is connected to the back shell 59, the flexible circuit board 400 is clamped between the support portion 593 and the abutting top portion 5210. The back shell 59, the support portion 593, the abutting top portion 5210 and the middle support member 521 enclose a first storage space 591. Specifically, the back shell 59 is a strip-shaped frame, and the strip-shaped frame includes a rectangular back plate 590, two side plates 595 provided on opposite sides of the back plate 590, and two end plates provided on opposite ends of the back plate 590. The support portion 593 is provided in the middle of the rectangular back plate 590. The support portion 593 and the two side plates 595 respectively enclose two first storage spaces 591, that is, the first storage spaces 591 are respectively provided on opposite sides of the support portion 593. Optionally, a positioning groove 5930 is provided on the front surface of the support portion 593, and the positioning groove 5930 is used to position the positioning portion 402 of the flexible circuit board 400. In this embodiment, the support portion 593 is a rectangular block, and the length direction of the rectangular block is parallel to the length direction of the back plate 590. Optionally, the back shell 59 is provided with a wire groove 5951 for inserting the flexible circuit board 400. Specifically, wire grooves 5951 are respectively provided on opposite sides of the back shell 59, and each wire groove 5951 communicates with the first storage space 591 on the same side. The flexible circuit board 400 can be slidably inserted into the wire groove 5951. Wire grooves 5951 are respectively provided on the front surfaces of the two side plates 595, and each wire groove 5951 faces the support portion 593. Locking portions 592 are respectively provided at opposite ends of the front surface of the back shell 59, and the bases 53 of the two folding assist assemblies 51 are respectively connected to the two locking portions 592 of the back shell 59. The locking portion 592 includes a plurality of connecting columns 594, and each connecting column 594 is provided with a locking hole 5942 along its axial direction.

[0056] Please refer to Figures 9 - 10 and Figures 13 - 15, rotating mechanisms 55 are respectively provided on opposite sides of the base 53. One end of the rotating member 550 of one rotating mechanism 55, which is away 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 away from the connecting member 555, is rotatably connected to the opposite side of the base 53. The rotating member 550 includes a first rotating portion 552 and a second rotating portion 553. The first rotating portion 552 and the second rotating portion 553 are respectively located at opposite ends of the rotating member 550. The first rotating portion 552 and the base 53 are rotatably connected through the cooperation of an arc track and an arc groove. The arc groove is provided in one of the base 53 and the first rotating portion 552, and the arc track is provided in the other of the base 53 and the first rotating portion 552. The axis line of the arc groove is collinear with the axis line of the rotation between the rotating member 550 and the base 53. In this embodiment, receiving grooves 530 are respectively provided 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 provided 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 provided 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.

[0057] In this embodiment, the base 53 includes a first body 531 and a second body 534, and the first body 531 is connected to the first body 531; specifically, 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. In this embodiment, 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. Opposite ends of the front surface of the first body 531 near the second body 534 are respectively provided with first receiving grooves 5314, and opposite ends of the front surface of the second body 534 near the first body 531 are respectively provided with second receiving grooves 5344; 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 and parallel; 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 and parallel. An installation hole 533 is provided on the front surface of the base 53, and the locking member passes through the installation hole 533 and is locked to the back shell 59 to fixedly connect the base 53 to the back shell 59. Two first shaft holes 535, two connection holes 536 and a fixing hole 537 are provided on the end face of the second body 534 facing the linkage mechanism 56. 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, and the axis lines of the two first shaft holes 535 and the two connection holes 536 are parallel to the rotation axis line between the rotating member 550 and the base 53.

[0058] In some embodiments, the arc groove 532 on the base 53 and the arc track 5522 on the first rotating portion 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 line; arc grooves are respectively provided on opposite sides of the first rotating portion 552, and the two arc grooves share the same axis line; when the first rotating portion 552 is received in the corresponding receiving groove 530, the two arc tracks are respectively rotatably received in the two arc grooves.

[0059] The second rotating part 553 and the connecting part 555 are rotatably connected to one end of the connecting part 555 through a rotating shaft 551. The second rotating part 553 is provided with a lug 5531 at one end away from the first rotating part 552. One end of the connecting part 555 is provided with a receiving groove 5552, and the lug 5531 is rotatably received in the receiving groove 5552. The rotating part 550 further includes a first connecting cylinder 5533, and the first connecting cylinder 5533 is connected to the end of the lug 5531 facing away from the first rotating part 552; the connecting part 555 includes a second connecting cylinder 5553, and the second connecting cylinder 5553 is provided at one end of the connecting part 555. The receiving groove 5552 penetrates the second connecting cylinder 5553 along the radial direction of the second connecting cylinder 5553. The first connecting cylinder 5533 and the second connecting cylinder 5553 are mutually engaged, so that the first connecting cylinder 5533 and the second connecting cylinder 5553 are coaxial, and the rotating shaft 551 penetrates through the inner cavity of the first connecting cylinder 5533 and the inner cavity of the second connecting cylinder 5553.

[0060] Please refer to Figures 16 - 19, the linkage mechanism 56 includes two rotating shafts 561 arranged in parallel at intervals, two connecting rods 562, and a gear combination 564. One of the connecting rods 562 is connected to one of the rotating shafts 561, and the other connecting rod 562 is connected to the other rotating shaft 561. Two receiving members 54 are respectively connected to the two rotating shafts 561. The gear combination 564 is arranged between the two connecting rods 562. The gear combination 564 includes a driving gear 5641 arranged on the connecting rod 562 and synchronous gears 5643 that mesh with each other. Each driving gear 5641 meshes with a corresponding synchronous gear 5643. The two connecting rods 562 can rotate synchronously through the gear combination 564 to drive the two rotating shafts 561 and the two receiving members 54 to rotate synchronously. The end of the connecting rod 562 away from the base 53 and the end of the corresponding connecting member 555 away from the rotating member 550 are slidably connected through the cooperation of a guide chute and a guide rail. The guide chute is arranged on one of the connecting rod 562 and the corresponding connecting member 555, and the guide rail is arranged on the other of the connecting rod 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 guide chute 5550 is formed on the connecting member 555, and a guide rail 5620 is provided at the end of the connecting rod 562 away from the base 53. The guide rail 5620 slidably penetrates through the guide chute 5550. Specifically, an avoidance groove 5554 is provided at the end of the front surface of the connecting member 555 away from the rotating member 550, and guide chutes 5550 are respectively arranged on the opposite side surfaces of the connecting member 555 in the avoidance groove 5554. 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 so that the side support member 523 is rotatably connected to the connecting member 555. In some 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 so that the side support member 523 is rotatably connected to the connecting member 555.

[0061] The rotating shaft 561 includes a shaft body 5610 and a connecting cap 5612 located at one end of the shaft body 5610. A clamping block 5611 is provided at the end of the shaft body 5610 away from the connecting cap 5612. A positioning portion 5613 is provided at the shaft body 5610 near the connecting cap 5612. One of the rotating shafts 561 is fixedly connected to one of the connecting rods 562 through its positioning portion 5613, and the other rotating shaft 561 is fixedly connected to the other connecting rod 562 through its positioning portion 5613. Specifically, the positioning portion 5613 is a positioning groove provided on the outer wall of the shaft body 5610, and the length direction of the positioning groove is parallel to the axial direction of the shaft body 5610. The connecting cap 5612 is a cylindrical block, and this cylindrical block is used for rotatably connecting to the base 53. A clamping groove 5616 is provided at the end of the shaft body 5610 near the clamping block 5611. 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.

[0062] The connecting rod 562 further comprises a sleeve 5622 and a connecting rod 5623, wherein the connecting rod 5623 is connected to the outer peripheral wall of the sleeve 5622, and the sleeve 5622 can be sleeved on the positioning portion 5613 of the shaft body 5610. Specifically, the sleeve 5622 has a non-circular second shaft hole 5624, and 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, and the sleeve 5622 and the rotating shaft 561 can rotate together around the axis of the rotating shaft 561. The driving gear 5641 is arranged 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 a first adjustment shaft 5628 is provided on one inner side of the escape groove 5621, and the axis of the first 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.

[0063] In other embodiments, guide slide grooves are respectively provided on opposite sides of the connecting rod 5623, and guide slide rails are respectively protruding on 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.

[0064] The synchronous gear 5643 includes a rotating shaft 5644 and a gear ring 5646 fixedly sleeved on the rotating shaft 5644, and opposite ends of the rotating shaft 5644 extend from opposite ends 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.

[0065] The linkage mechanism 56 further includes a fixing member 565 connected to one end of each of the two rotating shafts 561. The fixing member 565 is a rectangular positioning piece. Opposite ends of the fixing member 565 are respectively provided with first guide sliding holes 5652. The shaft bodies 5610 of the two rotating shafts 561 are respectively inserted into the two first guide sliding holes 5652. One of the rotating shafts 561 can rotate in the first guide sliding hole 5652, and the other rotating shaft 561 can rotate in the other first guide sliding hole 5652. The fixing member 565 can only slide axially along the two rotating shafts 561. Two spaced first connection holes 5654 are provided in the middle of the fixing member 565 between the two first guide sliding holes 5652. The axis line of the first guide 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 the link member 562. The link member 562 includes a first limiting surface 5626 and a second limiting surface 5627. When the two link 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 link 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 the end of the sleeve 5622 facing away from the pushing member 572. The first limiting surface 5626 and the second limiting surface 5627 are respectively two opposite end faces of the notch. The first limiting surface 5626 is farther from the guide rail 5620 than the second limiting surface 5627. The positioning portion 5656 is a positioning block. A positioning rod 5657 is provided on the side of the fixing member 565 facing away from the positioning portion 5656. The positioning rod 5657 is used for positioning on the base 53. Opposite end faces of the fixing member 565 are arc surfaces. The limiting mechanism 57 includes a pushing member 572, a holding member 573, an elastic member 575, a positioning member 576 and a friction assembly 577 provided on the link member 562. The pushing member 572, the holding member 573, the elastic member 575, the positioning member 576 and the friction assembly 577 are sleeved on the rotating shaft 561. Opposite ends of the elastic member 575 are respectively elastically abutted against the holding member 573 and the positioning member 576. The pushing member 572 includes a cam 5720. The cam 5720 is provided at one end of the sleeve 5622. The cam 5720 and the sleeve 5622 share the same axis line. The cam 5720 is provided at the end of the sleeve 5622 away from the driving gear 5641. The cams 5720 of the two link 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. 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 protrusions 5724 and the number of the first recesses 5725 can be set as required. For example, the cam 5720 may include one first protrusion 5724 and one first recess 5725, two first protrusions 5724 and two first recesses 5725, three first protrusions 5724 and three first recesses 5725, or four first protrusions 5724 and four first recesses 5725, etc. In this embodiment, the cam 5720 includes three first protrusions 5724 and three first recesses 5725. The abutting member 573 includes two first sliding cylinders 5730 spaced apart from each other, a connecting bar 5732 connected to the two first sliding cylinders 5730, and an abutting cam 5731. The abutting cam 5731 is provided at one end of the first sliding cylinder 5730, and the abutting cam 5731 and the first sliding cylinder 5730 are coaxial. In this embodiment, the abutting member 573 includes two abutting cams 5731. One abutting cam 5731 is provided at one end of one of the first sliding cylinders 5730, and the abutting cam 5731 and one of the first sliding cylinders 5730 are coaxial. The other abutting cam 5731 is provided at one end of the other first sliding cylinder 5730, and the abutting cam 5731 and the other first sliding cylinder 5730 are coaxial. The two abutting cams 5731 are located on the same side of the connecting bar 5732; the two first sliding cylinders 5730 and the two abutting cams 5731 are respectively sleeved on a pair of rotating shafts 561 in a sliding manner, and the two rotating shafts 561 are respectively rotatably inserted into the two first sliding cylinders 5730, and the abutting member 573 can slide along the axial direction of the rotating shaft 561. Specifically, the abutting cam 5731 includes a concave-convex surface provided at one end of the first sliding cylinder 5730. The concave-convex surface includes a second protrusion 5734 and a second recess 5735, and the second protrusion 5734 and the second recess 5735 are sequentially spaced apart along the circumferential direction of the sleeve; the number of the first protrusions 5724 and the number of the first recesses 5725 on the cam 5720 are the same as the number of the second protrusions 5734 and the number of the second recesses 5735 on the abutting cam 5731, so that the first protrusion 5724 cooperates with the second recess 5735, and the second protrusion 5734 cooperates with the first recess 5725. The abutting member 573 is provided with a second connection hole 5736. Specifically, the connecting bar 5732 is provided with two second connection holes 5736, and the axis lines of the second connection holes 5736 are parallel to the axis line of the first sliding cylinder 5730; the rotating shaft 5644 of the synchronous gear 5643 is respectively inserted through the first connection hole 5654 and the second connection hole 5736 at opposite ends.

[0066] In this embodiment, the elastic member 575 is a spring sleeved on each rotating shaft 561.

[0067] Optionally, the positioning member 576 includes two second sliding cylinders 5760 spaced apart from each other and a positioning portion 5763 connected between the two second sliding cylinders 5760. The two second sliding cylinders 5760 are respectively sleeved on the two rotating shafts 561 in a sliding manner, and the elastic member 575 is clamped between the first sliding cylinder 5730 and the second sliding cylinder 5760. Specifically, the positioning portion 5763 is a rectangular positioning block, and the two second sliding cylinders 5760 are arranged on opposite sides of the positioning block. The second sliding cylinder 5760 is provided with a second guiding hole 5765 along its axial direction, and each rotating shaft 561 can rotate in the corresponding second guiding hole 5765. The positioning member 576 can only slide along the axial directions of the two rotating shafts 561. Optionally, two avoiding holes 5767 are provided on one side of the positioning portion 5763 facing the synchronous gear 5643, and one end of the rotating shaft 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 on the side surface of the positioning member 576 facing the friction assembly 577.

[0068] The friction assembly 577 includes a first friction member 5770, a gasket 578, a second friction member 5775 and a buckle 579. Both the first friction member 5770 and the gasket 578 are connected to the rotating shaft 561. The first friction member 5770 is clamped by the positioning member 576 and the gasket 578. The first friction member 5770 can rotate relative to the positioning member 576 and the gasket 578 along with the rotating shaft 561, and there is a frictional resistance between the first friction member 5770 and the positioning member 576; the second friction member 5775 is sleeved on the rotating shaft 561, and the buckle 579 is used to be clamped in the slot 5616 of the rotating shaft 561. The second friction member 5775 is clamped by the buckle 579 and the gasket 578. The second friction member 5775 can rotate relative to the gasket 578 along with the rotating shaft 561. In this embodiment, the friction assembly 577 includes a pair of first friction members 5770 and a pair of second friction members 5775. The pair of first friction members 5770 and the pair of second friction members 5775 are respectively sleeved on the two rotating shafts 561, and a pair of buckles 579 are respectively clamped in the slots 5616 of the pair of rotating shafts 561; the pair of first friction members 5770 are clamped by the gasket 578 and the positioning member 576, and the pair of second friction members 5775 are clamped by the gasket 578 and the pair of buckles 579. When the rotating shaft 561 rotates relative to the base 53, the first friction member 5770 and the second friction member 5775 rotate along with the rotating shaft 561. There is a frictional resistance between the first friction member 5770 and the positioning member 576 and the gasket 578, and there is a frictional resistance between the second friction member 5775 and the gasket 578. The buckle 579 can be but not limited to a C-shaped buckle or a U-shaped buckle, etc.

[0069] Specifically, a first positioning hole 5772 is formed in the middle of the first friction member 5770, and the first 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 on the side surface of the first friction member 5770 facing the positioning member 567 and / or a second anti-slip portion 5774 is provided on the side surface of the first friction member 5770 facing away from the positioning member 576. The second anti-slip portion 5774 can increase the frictional resistance of the first friction member 5770. In this embodiment, the second anti-slip portions 5774 are respectively provided on the opposite side surfaces of the first friction member 5770. In this embodiment, a first anti-slip portion 5768 is provided on the side surface of the positioning member 576 facing the first friction member 5770, and a second anti-slip portion 5774 is provided on the side surface of the first friction member 5770 facing the positioning member 576. Optionally, the first anti-slip portion 5768 on the positioning member 576 can be omitted, and only the second anti-slip portion 5774 on the side surface of the first friction member 5770 facing the positioning member 576 is retained; or the second anti-slip portion 5774 on the side surface of the first friction member 5770 facing the positioning member 576 can be omitted, and only the first anti-slip portion 5768 on the positioning member 576 is retained. The first anti-slip portion 5768 and the second anti-slip portion 5774 can both be, but are not limited to, a rough surface, a damping layer, a plurality of small protrusions or a plurality of small concave protrusions, holes or a rough surface, etc.

[0070] The gasket 578 is slidably sleeved on a pair of rotating shafts 561, and the first friction member 5770 is located between the gasket 578 and the positioning member 576; when the first friction member 5770 rotates with the rotating shaft 561, there is a frictional resistance between the first friction member 5770 and the positioning member 576, and there is a frictional resistance between the first friction member 5770 and the gasket 578. Specifically, the gasket 578 is a strip-shaped plate, through holes 5782 are respectively provided at the opposite ends of the gasket 578, and third anti-slip portions 5784 are respectively provided on the opposite side surfaces of the gasket 578 around each through hole 5782. The third anti-slip portion 5784 can be, but is not limited to, a protrusion, a hole or a rough surface provided on the gasket 578, etc. In this embodiment, the third anti-slip portions 5784 are respectively provided on the opposite side surfaces of the gasket 578. Optionally, the third anti-slip portion 5784 on the side surface of the gasket 578 facing the first friction member 5770 can be omitted, and only the second anti-slip portion 5774 on the side surface of the first friction member 5770 facing the gasket 578 is retained; or the second anti-slip portion 5774 on the side surface of the first friction member 5770 facing the gasket 578 can be omitted, and only the third anti-slip portion 5784 on the side surface of the gasket 578 facing the first friction member 5770 is retained. Optionally, the opposite ends of the gasket 578 are respectively provided as arc surfaces.

[0071] A second positioning hole 5776 is formed in the middle of the second friction member 5775. The second friction member 5775 is fixedly connected to the rotating shaft 561 through the second positioning hole 5776. The gasket 578 is provided with a third anti-slip portion 5784 on the side facing the second friction member 5775, and / or the second friction member 5775 is provided with a fourth anti-slip portion 5778 on the side facing the gasket 578. In this embodiment, the gasket 578 is provided with a third anti-slip portion 5784 on the side facing the second friction member 5775, and the second friction member 5775 is provided with fourth anti-slip portions 5778 on both sides facing the gasket 578. The fourth anti-slip portion 5778 can be, but is not limited to, a convex portion, a hole, a rough surface, etc. provided on the second friction member 5775. Optionally, the third anti-slip portion 5784 on the side of the gasket 578 facing the second friction member 5775 can be omitted, and only the fourth anti-slip portion 5778 on the side of the second friction member 5775 facing the gasket 578 is retained; or the fourth anti-slip portion 5778 on the side of the second friction member 5775 facing the gasket 578 can be omitted, and only the third anti-slip portion 5784 on the side of the gasket 578 facing the second friction member 5775 is retained. The gasket 578 and the second friction member 5775 abut against each other. When the second friction member 5775 rotates with the rotating shaft 561, there is frictional resistance between the second friction member 5775 and the gasket 578.

[0072] As Figures 6 - 12 shown, the folding device 50 further includes two support members 58. One support member 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. The second storage space 580 communicates with the corresponding wire groove 5951. The second storage space 580 is used to accommodate 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 front surface of the support bar 582. 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.

[0073] Please refer to Figures 16 - 19When assembling the linkage mechanism 56 and the limiting mechanism 57, the ends of the two rotating shafts 561 away from the connecting cap 5612 are respectively inserted into the two first guide sliding holes 5652 of the fixing member 565 until the fixing member 565 stops at the connecting cap 5612; the gear rings 5646 of the two synchronous gears 5643 are meshed with each other and placed between the two connecting rods 562, and the two synchronous gears 5643 are respectively meshed with the two driving gears 5641; the ends of the two rotating shafts 561 away from the connecting cap 5612 are respectively inserted into the two sleeves 5622, and the ends of the two rotating shafts 5644 of the gear assembly 564 close to the fixing member 565 are respectively inserted into the two first connecting holes 5654 of the fixing member 565, and the positioning portions 5656 are accommodated in the corresponding notches of the sleeves 5622; each positioning portion 5656 is located between the corresponding first limiting surface 5626 and the second limiting surface 5627. The abutting member 573 is sleeved on the two rotating shafts 561 so that the two abutting cams 5731 can be rotatably engaged with the two cams 5720 respectively; the two elastic members 575 are sleeved on the two rotating shafts 561 respectively, and the two second sliding cylinders 5760 of the positioning member 576 are sleeved on the two rotating shafts 561 respectively so that the two elastic members 575 are clamped between the abutting member 573 and the positioning member 576; the two first friction members 5770 are sleeved on the two Rotate the shaft 561, put the gasket 578 on the two grounded rotating shafts 561, and then respectively put the other two second friction members 5775 on the two rotating shafts 561. At this time, the gasket 578 is located between the first friction member 5770 and the second friction member 5775, and the slot 5616 of each rotating shaft 561 exposes the side of the corresponding second friction member 5775 away from the positioning member 576; then, respectively snap the two buckles 579 into the slots 5616 of the two rotating shafts 561. At this time, that is, the cam 5720 and the abutting cam 5731 on the same rotating shaft 561 are coaxial and cooperate with each other, and the elastic member 575 is in an extruded state to push the abutting member 573, so that the cam 5720 can rotatably abut against the abutting cam 5731, and the two buckles 579 respectively abut against the sides of the two second friction members 5775 away from the positioning member 576, and the two clamping blocks 5611 respectively expose the side of the two buckles 579 away from the second friction member 5775.

[0074] When the linkage mechanism 56 is bent from the fully flattened state, one of the link members 562 is bent relative to the abutting member 573 towards 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 and the corresponding pushing member 572 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 synchronizing gear 5643. The rotation of the other driving gear 5641 drives the corresponding rotating shaft 561, the sleeve 5622 and the link member 562 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 and the corresponding pushing member 572 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 synchronizing gear 5643, and then drives the corresponding rotating shaft 561, the sleeve 5622 and the corresponding pushing member 572 to rotate, so that the two link members 562 of the linkage mechanism 56 move away from each other synchronously;

[0075] 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 abut against the two abutting cams 5731 respectively. The abutting member 573 slides axially along the rotating shaft 561 to squeeze the elastic member 575. The elastic member 575 elastically abuts against the positioning member 576, so that the first friction member 5770 is clamped between the gasket 578 and the positioning member 576 and the second friction member 5775 is clamped between the gasket 578 and the buckle 579, and the first friction member 5770 and the second friction member 5775 rotate relative to the positioning member 576 and the gasket 578 along with the corresponding rotating shaft 561. The frictional torque between each cam 5720 and the corresponding abutting cam 5731, the frictional resistance of the first friction member 5770 and the frictional resistance of the second friction member 5775 can limit the two link members 562 at a specific angle between 180 degrees and 0 degrees. When the angle between the two link members 562 is 180 degrees, the linkage mechanism 56 is in a fully flattened state. When the angle between the two link members 562 is 0 degrees, the linkage mechanism 56 is in a fully bent state.

[0076] Please refer to Figures 3 - 15, when assembling the folding device 50, place the two first connecting cylinders 5533 of one of the rotating members 550 in the two receiving grooves 5552 of one of the connecting members 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; respectively pass the two rotating shafts 551 through the inner cavities of the corresponding first connecting cylinders 5533 and the inner cavities of the corresponding second connecting cylinders 5553, so that the two rotating members 550 are respectively rotatably connected to the two connecting members 555; 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 other side of the base 53, so that the two arc tracks 5522 of each first rotating portion 552 are respectively rotatably received in the two arc grooves 532 of the base 53, and the positioning post 5312 is snap-fitted into the positioning hole 5342. Place the combination of the linkage mechanism 56 and the limiting mechanism 57 between the two connecting members 555, and slidably connect one end of one link member 562 away from the base 53 to one of the connecting members 555, and slidably connect one end of the other link member 562 away from the base 53 to the other connecting member 555; specifically, the two guide rails 5620 of one link member 562 are respectively slidably inserted into the two guide grooves 5550 of one of the connecting members 555, and the two guide rails 5620 of the other link member 562 are respectively slidably inserted into the guide grooves 5550 of the other connecting member 555, so that the two connecting caps 5612, the two rotating shafts 5644 and the positioning rod 5657 are respectively inserted into the two first shaft holes 535, the two connecting holes 536 and the fixing hole 537.Insert the two first redundant parts 401 of the flexible circuit board 400 into the through slots 545 of the two receiving members 54 respectively, and connect the two fixing parts 406 of the flexible circuit board 400 to the support slots 5821 of the two support members 58 through the first positioning members 407 respectively; Place the bases 53 of the two folding assisting assemblies 51 on the two locking parts 592 of the back shell 59 respectively, place the flexible circuit board 400, the two receiving members 54 and the two support members 58 between the two folding assisting assemblies 51, position the positioning part 402 on the support part 593 of the back shell 59 through the fixing member 408, and the fixing member 408 is snap-fitted into the positioning slot 5930. The part between the first redundant part 401 and the second redundant part 403 on one side of the flexible circuit board 400 is slidably received in the wire groove 5951 on one side of the back shell 59, and the part between the first redundant part 401 and the second redundant part 403 on the relatively opposite side of the flexible circuit board 400 is slidably received in the wire groove 5951 on the relatively opposite side of the back shell 59; Sleeve the two connecting parts 541 of one of the receiving members 54 on the two rotating shafts 561 on one side of the back shell 59 respectively, that is, snap the two snap-fitting blocks 5611 on one side of the back shell 59 into the two snap-fitting holes 5412 of one of the receiving members 54 respectively; The two connecting parts 541 of the other receiving member 54 are respectively sleeved on the two rotating shafts 561 on the relatively opposite side of the back shell 59, that is, snap the two snap-fitting blocks 5611 on the relatively opposite side of the back shell 59 into the two snap-fitting holes 5412 of the other receiving member 54 respectively. Connect the two connecting pieces 584 of one of the support members 58 to the two connecting members 555 on one side of the back shell 59 through the locking members passing through the corresponding connecting holes 5842 respectively, and connect the two connecting pieces 584 of the other support member 58 to the two connecting members 555 on the relatively opposite side of the back shell 59 through the locking members passing through the corresponding connecting holes 5842 respectively; Place the opposite ends of the middle support member 521 on the two bases 53 respectively, so that the abutting top 5210 of the middle support member 521 abuts against the positioning part 402 of the flexible circuit board 400, and the locking member passes through the connecting hole on the middle support member 521 and the mounting hole 533 on the base 53 and is locked to the corresponding connecting column; Place the two side support members 523 on the opposite sides of the base 53, rotatably receive the two rotating tracks 5556 of each connecting member 555 in the corresponding pair of rotating slots 5234 respectively, and pass the first adjusting shaft 5628 of each connecting rod member 562 through the corresponding adjusting slot 5237; Make the middle support member 521 located between the two side support members 523.

[0077] 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 and 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 and one of the connecting rod members 562 to rotate relative to the base 53 respectively. The rotation of the one connecting rod member 562 drives the other connecting rod member 562 to rotate synchronously relative to the base 53 through the gear combination 564. The two rotating shafts 561 rotate synchronously relative to the base 53 respectively. The two receiving members 54 rotate synchronously with the two rotating shafts 561 respectively. The rotation directions of the two receiving members 54 are opposite. The two first redundant portions 401 of the flexible circuit board 400 can be wound around the two receiving members 54 respectively or separated from the winding of the two receiving members 54.

[0078] First receiving spaces 591 are respectively formed between the opposite sides of the back shell 59 and the middle support member 521 on the opposite sides of the support portion 593. The two receiving members 54 are respectively received in the two first receiving spaces 591 of the back shell 59. When the two side support members 523 are in a fully flattened state, the two rotating mechanisms 55 are in a flattened state. The first adjustment shaft 5628 is positioned at the second positioning section 5237b, and the positioning portion 5656 abuts against the second limiting surface so that the folding device 50 maintains a fully flattened state. The two first redundant portions 401 of the flexible circuit board 400 are wound around the receiving portions 543 of the two receiving members 54, and the two receiving members 54 and the first redundant portions 401 thereon are respectively received in the two first receiving spaces 591. A second receiving space 580 communicating with the first receiving space 591 is formed between the back shell 59 and the support member 58 and the side support member 523 on the same side. The two second redundant portions 404 of the flexible circuit board 400 are respectively received 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 reversely 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 fully folded state. The first adjustment shaft 5628 is positioned at the first positioning section 5237a, and the positioning portion 5656 abuts against the first limiting surface so that the folding device 50 maintains a fully bent state. The fronts of the two side support members 523 and the middle support member 521 enclose a water droplet shape. The two support members 58 respectively tension the two fixing portions 406 of the flexible circuit board 400, so that the second redundant portion 403 of the flexible circuit board 400 is straightened, and the first redundant portion 401 is separated from the winding on the receiving portion 543 and straightened.

[0079] Please refer to Figures 1 - 3 and Figures 20 - 22, place the installed folding device 50 between the two frame bodies 21, position the support bars 582 of the two support members 58 in the positioning grooves 218 of the two frame bodies 21 respectively, and place the connecting members 555 on the opposite sides of the folding device 50 in the positioning grooves 216 of the two frame bodies 21 respectively and fixedly connect them to the two frame bodies 21. When the folding housing 20 is in a flattened state, the storage grooves 210 of the two frame bodies 21 communicate with the second storage spaces 580 on the opposite sides of the back shell 59 respectively. Each second redundant portion 403 is partially accommodated in the corresponding second storage space 580, and each first redundant portion 401 is wound around the corresponding storage portion 543 and accommodated in the first storage space 591. The fronts of the two frame bodies 21, the front of the middle support member 521, and the fronts of the two side support members 523 are coplanar. The back surface of the flexible screen 30 is connected to the fronts of the two frame bodies 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 face the bendable mechanisms on the fronts of the two frame bodies 21 respectively.

[0080] Please refer to Figure 1 and Figures 23 to 30, 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, causing the rotating mechanism 55 connected to the two frames 21 to rotate in a direction approaching each other. The folding of the folding device 50 is achieved through the two folding assisting components 51. The foldable area 31 bends along with the support mechanism 52, and the first redundant portion 401 and the second redundant portion 403 of the flexible circuit board 400 are straightened as the folding housing 20 folds. Specifically, if a bending force is applied to one frame 21, this frame 21 drives the corresponding rotating mechanism 55 to rotate relative to the base 53 towards the side close to the flexible screen 30; to drive the corresponding connecting rod member 562 to rotate relative to the base 53 towards the side close to the flexible screen 30 along the axis line of the corresponding rotating shaft 561. At the same time, the guide rail 5620 of the connecting rod member 562 slides 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 connecting rod member 562 rotate along the axis line of the corresponding rotating shaft 561. The rotating driving gear 5641 drives another driving gear 5641 to rotate through the gear combination of the synchronous gear 5643, and then drives the corresponding rotating shaft 561, sleeve 5622, pushing member 572 and connecting rod 5623 to rotate, so that the two connecting rod members 562 of the linkage mechanism 56 approach each other synchronously; the two rotating shafts 561 on one side of the back shell 59 drive the corresponding receiving member 54 to rotate in one rotation direction synchronously, causing the first redundant portion 401 to disengage from the receiving member 54 and be straightened; the two rotating shafts 561 on the opposite side of the back shell 59 drive the corresponding receiving member 54 to rotate in another rotation direction synchronously, causing the first redundant portion 401 to disengage from the receiving member 54 and be straightened. This one rotation direction is opposite to the other rotation direction, and the two second redundant portions 403 are both straightened; at the same time, the two cams 5720 respectively rotate and push the two abutting cams 5731, and the abutting member 573 slides along the axial direction of the rotating shaft 561 to squeeze the elastic member 575. The elastic member 575 elastically pushes the positioning member 576 so that the first friction member 5770 is clamped between the gasket 578 and the positioning member 576 and the first friction member 5770 is clamped between the gasket 578 and the buckle 579, and the first friction member 5770 and the second friction member 5775 rotate relative to the gasket 578 and the positioning member 576 along with the corresponding rotating shaft 561.During the bending process of the linkage mechanism 56, the first rotating part 552 of the rotating member 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 member 550 is rotatably connected to the corresponding connecting member 555 along the corresponding rotating shaft 551. The second positioning section 5237b of the first 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 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 bends into a water droplet shape, thus realizing the seamless folding of the electronic device 100.

[0081] 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 of the first friction member 5770, and the frictional resistance of the second friction member 5775 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 bent and limited at 0 degrees, that is, the two non-bendable areas 33 of the flexible screen 30 are parallel to each other, the two first redundant parts 401 are respectively wound around the two storage parts 543 and accommodated in the two first storage spaces 591, and the two second redundant parts 403 are respectively accommodated in the two second storage spaces 580; when the two frames 21 are flattened and limited at 180 degrees, the bendable area 31 of the flexible screen 30 bends to form 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 two first redundant parts 401 are respectively straightened away from the two rotating shafts 561, and the two second redundant parts 403 are respectively straightened.

[0082] 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 towards the side close to the flexible screen 30, and the electronic device 100 is bent through the folding device 50.

[0083] When it is necessary to flatten the electronic device 100, pull out a frame 21 outward, so that two rotating mechanisms 55 connected to the two frames 21 rotate in a direction away from each other, and the folding device 50 is flattened through two folding assistance components 51. The foldable area 31 is bent along with the support mechanism 52. The two first redundant parts 401 of the flexible circuit board 400 are respectively straightened out of the winding around the two rotating shafts 561, and at the same time, the two second redundant parts 403 are respectively straightened.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 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 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 on one side of the back shell 59 drive the corresponding receiving members 54 to rotate in the first rotation direction synchronously, so that one of the first redundant portions 401 is wound around the rotating shaft 561 and placed in the first receiving space 591; the two rotating shafts 561 on the opposite side of the back shell 59 drive the corresponding receiving members 54 to rotate in the second rotation direction synchronously, so that the other first redundant portion 401 is wound around the rotating shaft 561 and placed in the first receiving space 591. The first rotation direction is opposite to the second rotation direction, and the two second redundant portions 403 are bent and respectively placed in the two second receiving 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 positioning member 576 and the abutting member 573, so that the positioning member 576 slides along the axial direction of the rotating shaft 561. The first friction member 5770 is clamped between the gasket 578 and the positioning member 576, and the second friction member 5775 is clamped between the gasket 578 and the buckle 579. The first friction member 5770 and the second friction member 5775 rotate relative to the gasket 578 and the positioning member 576 along 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 first 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, so as to realize the mutual separation of the two side support members 523, and the folding device 50 is unfolded. The foldable area 31 of the flexible screen 30 is unfolded along with the folding device 50 until the flexible screen 30 is flattened.

[0084] During the flattening process of the electronic device 100, the frictional torques between the two cams 5720 and the two abutting cams 5731 respectively, and the frictional torques of the first friction member 5770 and the second friction member 5775 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 two first redundant portions 401 are respectively wound around the two storage portions 543 and accommodated in the two first storage spaces 591, and the two second redundant portions 403 are respectively bent and accommodated in the two second storage spaces 580.

[0085] In other bending 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 the electronic device 100 can be unfolded through the folding device 50.

[0086] 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 storage members 54 rotate synchronously, so that the two first redundant portions 401 of the flexible circuit board 400 are respectively wound around the two storage portions 543 and accommodated in the two first storage spaces 591. At the same time, the two second redundant portions 403 of the flexible circuit board 400 are respectively bent and accommodated in the corresponding second storage spaces 580, which can effectively solve the problem that the redundant segments of the flexible circuit board cannot be completely stored 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 assistance component 51. There is a frictional torque between the cam 5720 and the abutting cam 5731, and the first friction member 5770 and the second friction member 5775 also have frictional resistance; the bending of the electronic device 100 can be stably limited at a specific angle between 0 degrees and 180 degrees, realizing the hovering function of the whole machine.

[0087] The above are the implementation manners 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; A base located on the back shell; A linkage mechanism including a rotating shaft rotatably connected to the base; A support mechanism including a middle support member connected to the back shell, and the middle support member and the back shell define a first receiving space for receiving a flexible circuit board; and A receiving member connected to the rotating shaft, and the flexible circuit board is connected to the receiving member; Wherein, the receiving member is received in the first receiving space, and the receiving member can rotate with the rotating shaft so that the flexible circuit board is wound around the receiving member.

2. The folding device according to claim 1, wherein The receiving member includes a connecting portion and a receiving portion. The connecting portion is connected to the rotating shaft, the receiving portion is connected to one end of the connecting portion away from the rotating shaft, the flexible circuit board is connected to the receiving portion, and the rotation axis of the receiving member is collinear with the axis of the rotating shaft.

3. The folding device according to claim 2, characterized in that, The receiving portion is provided with a through groove, and the flexible circuit board is threaded through the through groove.

4. The folding device according to claim 2, characterized in that, The connecting portion and the rotating shaft are connected by the cooperation of a clamping hole and a clamping block. The clamping hole is provided on one of the connecting portion and the rotating shaft, and the clamping block is provided on the other of the connecting portion and the rotating shaft.

5. The folding device according to claim 3, characterized in that The length direction of the first receiving space is parallel to the axial direction of the rotating shaft. The receiving portion is a receiving rod, the connecting portion is connected to the end of the receiving rod, the length direction of the receiving rod is parallel to the axial direction of the rotating shaft, the through groove is provided on the receiving rod, and the opposite sides of the through groove respectively penetrate the outer peripheral surface of the receiving rod, and the length direction of the through groove is parallel to the axial direction of the rotating shaft.

6. The folding device according to claim 2, wherein When the receiving member rotates along a first rotation direction with the rotating shaft, the flexible circuit board is wound around the receiving portion; when the receiving member rotates along a second rotation direction with the rotating shaft, the flexible circuit board is disengaged from the winding on the receiving portion, and the first rotation direction is opposite to the second rotation direction.

7. The folding device according to claim 1, wherein A support portion is provided on the inner surface of the back shell, and an abutting top portion is provided on the side of the middle support member facing the back shell. The flexible circuit board is clamped between the support portion and the abutting top portion, and the back shell, the support portion, the abutting top portion and the middle support member enclose the first receiving space.

8. The folding device according to claim 7, wherein, The linkage mechanism includes two parallel and spaced rotating shafts. One end of each rotating shaft is connected with a receiving member. The first receiving spaces are respectively provided on the opposite sides of the support portion between the back shell and the middle support member. One of the receiving members is received in one of the first receiving spaces and is connected to one side of the flexible circuit board, and the other receiving member is received in the other first receiving space and is connected to the opposite side of the flexible circuit board.

9. The folding device according to claim 8, characterized in that, The linkage mechanism further includes two connecting rod members and a gear combination. One of the connecting rod members is connected to one of the rotating shafts, the other connecting rod member is connected to the other rotating shaft, the gear combination is arranged between the two connecting rod members, and the two connecting rod members can rotate synchronously through the gear combination to drive the two rotating shafts and the two receiving members to rotate synchronously.

10. The folding device according to claim 9, characterized in that, Further included is a rotating mechanism, the rotating mechanisms are respectively arranged on two 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, and 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.

11. The folding device according to claim 10, characterized in that, Further included are 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 flexible circuit board.

12. The folding device according to claim 11, characterized in that, Guide chutes are respectively arranged on two opposite sides of the back shell, and each guide chute communicates with the first storage space and the second storage space on the same side, and the flexible circuit board can slidably pass through the guide chute.

13. The folding device according to claim 11, wherein, When the two rotating mechanisms are in a flattened state, the first redundant portion of the flexible circuit board is accommodated in the first storage space, and the second redundant portion of the flexible circuit board is accommodated in the second storage space; when the two rotating mechanisms are in a fully folded state, the second redundant portion of the flexible circuit board is straightened, and the first redundant portion is straightened by being separated from the winding on the storage member.

14. A folding housing, characterized in that, The folding housing includes the folding device according to any one of claims 1-13 and two frames, the folding device is located between the two frames, and the two frames are respectively connected to two opposite sides of the folding device.

15. The folding housing according to claim 14, wherein The frame is provided with a storage groove communicating with the first storage space. When the two frames are in a flattened state, the first storage space is used to store the first redundant portion of the flexible circuit board, and the storage groove is used to store the second redundant portion of the flexible circuit board.

16. An electronic device, characterized in that, The electronic device includes a flexible screen and the folding housing according to any one of claims 14-15, and the flexible screen is arranged on the folding housing.

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