Rotating shaft device, folding housing and electronic device

Abstract

The application provides a rotating shaft device, which comprises a supporting mechanism, a rotating assembly and a driven assembly. The supporting mechanism comprises a side support. The rotating assembly comprises a fixed seat and rotating mechanisms arranged on opposite sides of the fixed seat. The rotating mechanism comprises a rotating piece and a connecting piece. The opposite ends of the rotating piece are rotatably connected to the fixed seat and the connecting piece respectively. The driven assembly comprises two driven pieces. One end of the driven piece is rotatably connected to the fixed seat. The opposite end of the driven piece is rotatably connected to the connecting piece and the side support respectively. The rotating piece is connected to the side support. The connecting piece is rotatably connected to the side support. The application also provides a folding shell provided with the rotating shaft device and an electronic device.

Description

Technical Field

[0001] This invention relates to the field of flexible screen support, and more particularly to a pivot device for supporting a flexible screen, a foldable housing provided with the pivot device, and an electronic device provided with the foldable housing. Background Technology

[0002] With the development of display equipment, flexible foldable displays have emerged. Currently, folding schemes for flexible foldable displays include inward folding and outward folding. Inward folding flexible displays include U-shaped folding screens and waterdrop-shaped folding screens; among them, waterdrop-shaped folding screens are increasingly popular due to their thinness and miniaturization. Waterdrop-shaped folding screens in related technologies generally use a hinge mechanism for support. However, most current hinge mechanisms have relatively simple hinge motion constraint designs, resulting in inflexible adjustments and affecting the reliability of constraint during folding or unfolding. Summary of the Invention

[0003] This application provides a rotating shaft device, a folding housing provided with the rotating shaft device, and an electronic device provided with the folding housing.

[0004] This application provides a rotating shaft device, comprising a support mechanism, a rotating assembly, and a driven assembly. The support mechanism includes two side support members. The rotating assembly includes a fixed base and rotating mechanisms disposed on opposite sides of the fixed base. Each rotating mechanism includes a rotating member and a connecting member, with opposite ends of the rotating member rotatably connected to the fixed base and the connecting member, respectively. The driven assembly includes two driven members, one end of which is rotatably connected to the fixed base, and the other end of which, away from the fixed base, is connected to the connecting member and the side support member, respectively. The rotating member is connected to the side support member, and the connecting member is rotatably connected to the side support member. When the two connecting members approach each other, the two rotating members rotate relative to the fixed base and the connecting member. When the two sides move closer together, the rotating members are slidably and rotatably connected to the corresponding side supports. The two driven members rotate relative to the fixed base, and the end of the driven member away from the fixed base slides and rotates relative to the connecting member and the side supports, causing the two driven members to move closer together, so that the two side supports fold together. When the two connecting members move away from each other, the two rotating members rotate relative to the fixed base and the connecting member, moving away from each other. The rotating members are slidably and rotatably connected to the corresponding side supports. The two driven members rotate relative to the fixed base, and the end of the driven member away from the fixed base slides and rotates relative to the connecting member and the side supports, causing the two driven members to move away from each other, so that the two side supports unfold together.

[0005] The rotating member and the side support member are slidably and rotatably connected by the cooperation of the first limiting groove and the first limiting part. The first limiting groove is provided in one of the rotating member and the side support member, and the first limiting part is provided in the other of the rotating member and the side support member.

[0006] In some embodiments, the first limiting groove includes a first limiting segment and a second limiting segment at opposite ends, the first limiting segment being closer to the fixed base than the second limiting segment; when the side support member is in a flattened state relative to the fixed base, the first limiting portion is limited to the second limiting segment; when the side support member is in a fully bent state relative to the fixed base, the first limiting portion is limited to the first limiting segment.

[0007] In some embodiments, the side support member includes a side support plate, the back of the side support plate is provided with a first protrusion, the first limiting groove is provided on the side of the first protrusion near the fixed seat, the first limiting groove is bent away from the side support plate, and the first limiting part includes a first limiting shaft connected to the rotating member and passing through the first limiting groove.

[0008] In some embodiments, the driven member and the side support member are slidably and rotatably connected by a second limiting groove and a second limiting part, wherein the second limiting groove is provided in one of the driven member and the side support member, and the second limiting part is provided in the other of the driven member and the side support member; the driven member and the connecting member are slidably and rotatably connected by a third limiting groove and a third limiting part, wherein the third limiting groove is provided in one of the driven member and the connecting member, and the third limiting part is provided in the other of the driven member and the connecting member.

[0009] In some embodiments, the second limiting groove includes a third limiting segment and a fourth limiting segment at its opposite ends, the third limiting segment being closer to the fixed base than the fourth limiting segment; the third limiting groove includes a fifth limiting segment and a sixth limiting segment at its opposite ends, the fifth limiting segment being closer to the fixed base than the sixth limiting segment; when the side support member is in a flattened state relative to the fixed base, the second limiting portion is limited to the fourth limiting segment of the second limiting groove, and the third limiting portion is limited to the sixth limiting segment of the third limiting groove; when the side support member is in a fully bent state relative to the fixed base, the second limiting portion is limited to the third limiting segment of the second limiting groove, and the third limiting portion is limited to the fifth limiting segment of the third limiting groove.

[0010] In some embodiments, the side support includes a side support plate, the follower is located on the back side of the side support plate, and the second limiting groove and the third limiting groove are both bent toward the side away from the side support plate.

[0011] In some embodiments, the side support member includes a side support plate, the back of the side support plate is provided with a second protrusion, the second limiting groove is provided on the second protrusion, the third limiting groove is provided on the connector, the second limiting part includes a second limiting shaft connected to the driven member and passing through the second limiting groove, and the third limiting part includes a third limiting shaft connected to the driven member and passing through the third limiting groove.

[0012] In some embodiments, the follower has a clearance groove at one end away from the fixed base, the clearance groove being used to accommodate the second protrusion, and the second limiting axis and the third limiting axis being coaxial.

[0013] In some embodiments, the rotating shaft device further includes a positioning mechanism, the positioning mechanism including a positioning member, the positioning member being rotatably connected to the fixed seat, the positioning member being slidably connected to the connecting member, and one end of the positioning member away from the fixed seat being movably connected to the side support member.

[0014] In some embodiments, the positioning member and the side support member are slidably and rotatably connected by the cooperation of a fourth limiting groove and a fourth limiting part, wherein the fourth limiting groove is provided in one of the positioning member and the side support member, and the fourth limiting part is provided in the other of the positioning member and the side support member.

[0015] In some embodiments, the fourth limiting groove includes a seventh limiting segment and an eighth limiting segment at its opposite ends, the seventh limiting segment being closer to the fixed base than the eighth limiting segment; when the side support member is in a flattened state relative to the fixed base, the first limiting portion is limited to the eighth limiting segment; when the side support member is in a fully bent state relative to the fixed base, the first limiting portion is limited to the seventh limiting segment.

[0016] In some embodiments, the side support member includes a side support plate, the back of the side support plate is provided with a third protrusion, the fourth limiting groove is provided on the third protrusion, the fourth limiting groove is bent toward the side away from the side support plate, and the fourth limiting part includes a fourth limiting shaft connected to the positioning member and passing through the fourth limiting groove.

[0017] In some embodiments, the end of the positioning member away from the fixed seat is provided with a clearance groove, and the third protrusion is accommodated in the clearance groove.

[0018] In some embodiments, the connector is provided with a stop portion corresponding to the positioning member, and the fourth limiting groove of the third protrusion is provided with an abutment at one end near the fixed seat; when the side support member is in a fully bent state relative to the fixed seat, the first end of the fourth limiting shaft abuts against the abutment, so that the second end of the fourth limiting shaft is in a stop-fitting engagement with the stop portion.

[0019] In some embodiments, the positioning mechanism further includes an elastic element having a pre-elastic force, the pre-elastic force being used to drive the second end of the fourth limiting shaft to disengage from the stop portion.

[0020] In some embodiments, the end of the abutment away from the fixed seat is provided with a guide surface. During the bending process of the side support relative to the fixed seat, the first end of the fourth limiting shaft slides against the guide surface, causing the second end of the fourth limiting shaft to move toward the stop portion. The elastic member undergoes elastic deformation until the second end of the fourth limiting shaft is engaged with the stop portion.

[0021] In some embodiments, the positioning member includes a positioning part disposed on the side of the positioning member away from the fixed seat, and the side support member includes a side support plate and a locking part disposed on the side of the side support plate away from the fixed seat; when the side support member is in a fully bent state relative to the fixed seat, the positioning part and the locking part are engaged in a stop-positioning cooperation. In some embodiments, the positioning member and the connecting member are connected by a guide groove and a guide rail. The guide groove extends along a direction perpendicular to the rotation axis between the positioning member and the fixed base. The guide groove is provided in one of the positioning member and the connecting member, and the guide rail is provided in the other of the positioning member and the connecting member.

[0022] This application also provides a folding housing, which includes a pivot device and two frames. The pivot device is located between the two frames, and the two frames are respectively connected to the connecting parts of the two rotating mechanisms of the pivot device. The two frames can be folded or unfolded to each other through the pivot device.

[0023] In some embodiments, the side support of the rotating shaft device is provided with a positioning part on the side away from the fixed seat, and the frame is provided with a locking part on the side near the rotating shaft device; when the two frames are in a fully folded state, the positioning part of the side support and the locking part are engaged.

[0024] This application also provides an electronic device, which includes a flexible screen and a folding housing. Two side supports of the pivot device of the folding housing are supported on the back of the flexible screen. The flexible screen is folded or flattened as the folding housing is folded or unfolded.

[0025] The side support member and the connecting member of the rotating shaft device of the present invention are rotatably connected, and the two opposite ends of the rotating member are respectively rotatably connected to the fixed base and the connecting member. The rotating member is slidably and connected to the side support member. One end of the driven member is rotatably connected to the fixed base, and the end of the driven member away from the fixed base is slidably and rotatably connected to the connecting member and the side support member. This allows the side support member to be simultaneously constrained by the movement of the rotating member and the driven member, stabilizing the folding or unfolding process of the rotating shaft device, improving the flexibility of the folding or unfolding of the rotating shaft device, facilitating the bending or unfolding of the rotating shaft device, and improving the accuracy of the rotating shaft device during the folding or unfolding process. Secondly, the rotating shaft device has a compact structure, resulting in a smaller overall width of the rotating shaft device, thereby reducing the internal space occupied by the rotating shaft device in the folding shell. This is not only beneficial for the layout of other components such as the motherboard or battery, but also conducive to miniaturization. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a three-dimensional structural schematic diagram of an electronic device in one embodiment of this application; Figure 2 yes Figure 1 An exploded view of the folding housing and flexible screen of the electronic device. Figure 3 yes Figure 2 An exploded view of the three-dimensional structure of the folded shell in the diagram; Figure 4 yes Figure 3 A three-dimensional structural diagram of the folded shell from another perspective; Figure 5 yes Figure 3 Enlarged three-dimensional view of the rotating shaft device in the diagram; Figure 6 yes Figure 5 A three-dimensional structural diagram of the rotating shaft device from another perspective; Figure 7 yes Figure 5An exploded three-dimensional structural diagram of the rotating shaft device in the diagram; Figure 8 yes Figure 7 A three-dimensional structural diagram of the rotating shaft device from another perspective; Figure 9 yes Figure 8 A partial three-dimensional sectional view of the support mechanism from another perspective; Figure 10 yes Figure 7 A further exploded schematic diagram of the three-dimensional structure of the rotating shaft device in the diagram; Figure 11 yes Figure 10 A three-dimensional structural diagram of the rotating shaft device from another perspective; Figure 12 yes Figure 10 Enlarged three-dimensional structural diagram of some components of the rotating shaft device; Figure 13 yes Figure 11 A three-dimensional structural diagram of some components of the rotating shaft device in the diagram; Figure 14 yes Figure 12 An exploded three-dimensional structural diagram of one of the limiting components of the rotating shaft device in the diagram; Figure 15 yes Figure 14 A three-dimensional structural diagram of the limiting component from another perspective; Figures 16-24 yes Figure 5 Three-dimensional sectional views of different parts of the central rotating shaft device; Figure 25 yes Figure 1 A three-dimensional structural diagram of the electronic device in a fully bent state; Figure 26 yes Figure 25 A three-dimensional structural diagram of the rotating shaft device in the diagram; Figure 27 yes Figure 25 A three-dimensional structural diagram of the rotating shaft device from another perspective; Figures 28-36 yes Figure 25 A three-dimensional sectional view of different parts of the folded shell. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Furthermore, the following descriptions of various embodiments are based on the accompanying illustrations and are used to illustrate specific embodiments that can be implemented in this application. Directional terms used in this application, such as "up," "down," "front," "back," "left," "right," "inner," "outer," and "side," are merely for reference to the accompanying illustrations. Therefore, the directional terms used are for better and clearer explanation and understanding of this application, and are not intended to indicate or imply that the referred device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0030] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "connected," "linked," and "set on" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] Please refer to the following: Figure 1 and Figure 2 In one embodiment of the present invention, the electronic device 100 includes a folding housing 20 and a flexible screen 30 disposed on the folding housing 20. The flexible screen 30 can be a flexible display screen, a flexible touch screen, a flexible touch display screen, or other flexible components with corresponding functions, or a flexible component fixedly attached to a flexible support plate, such as a flexible display screen or a flexible touch screen attached to a flexible steel plate. The flexible screen 30 bends or unfolds with the folding housing 20. The folding housing 20 includes two frames 21 and a pivot device 22 connecting the two frames 21. The two frames 21 can be folded or unfolded with the pivot device 22. The flexible screen 30 includes a bendable area 31 corresponding to the pivot device 22, and two non-bendable areas 33 connected to opposite sides of the bendable area 31. The two non-bendable areas 33 of the flexible screen 30 can be fixed to the front of the two frames 21 respectively, and the bendable area 31 is attached to the front of the pivot device 22. The bendable area 31 of the flexible screen 30 can be bent or unfolded with the pivot device 22.

[0032] Please refer to the following: Figures 1-4The rotating shaft device 22 includes a support mechanism 23, a rotating assembly 25, a driven assembly 26, and a positioning mechanism 27. The support mechanism 23 includes a side support member 233. The rotating assembly 25 includes a fixed base 251 and a rotating mechanism 253. The rotating mechanism 253 includes a rotating member 254 and a connecting member 256. The two opposite ends of the rotating member 254 are rotatably connected to the fixed base 251 and the connecting member 256, respectively. The driven assembly 26 includes a driven member 261. One end of the driven member 261 is rotatably connected to the fixed base 251, and the other end of the driven member 261 away from the fixed base 251 is slidably and rotatably connected to the connecting member 256 and the side support member 233, respectively. The positioning mechanism 27 includes a positioning member 271. The positioning member 271 is rotatably connected to the fixed base 251, and the positioning member 271 is slidably connected to the connecting member 256. In this embodiment, the support mechanism 23 includes two side support members 233, which are disposed on opposite sides of the front of the fixed base 251, i.e., the two side support members 233 are symmetrically arranged around the center of the fixed base 251; the rotating assembly 25 includes two rotating mechanisms 253, which are rotatably connected to opposite sides of the fixed base 251, preferably symmetrically arranged around the center of the fixed base 251; the driven assembly 26 includes two driven members 261, which are rotatably connected to opposite sides of the fixed base 251, preferably symmetrically arranged around the center of the fixed base 251; the positioning mechanism 27 includes two positioning members 271, which are rotatably connected to opposite sides of the fixed base 251, preferably symmetrically arranged around the center of the fixed base 251. The rotating member 254 is slidably and rotatably connected to the side support member 233. Specifically, the middle position of the rotating member 254 is slidably and rotatably connected to the corresponding side support member 233; and / or the end of the positioning member 271 away from the fixed base 251 is slidably and rotatably connected to the corresponding side support member 233. In this embodiment, the rotating member 254 and the positioning member 271 on the same side of the fixed base 251 are slidably and rotatably connected to the same side support member 233. The connecting member 256 is rotatably connected to the side support member 233. The connecting member 256 rotates relative to the fixed base 251 to drive the rotating member 254, the driven member 261, and the positioning member 271 to rotate relative to the fixed base 251. The rotation of the rotating mechanism 253, the driven member 261, and the positioning member 271 drives the side support member 233 to bend or unfold relative to the fixed base 251. When the two side supports 233 are flattened, their front surfaces are coplanar with the front surface of the fixing base 251; the flexible screen 30 fits against the front surfaces of the fixing base 251 and the side supports 233. When the two side supports 233 are folded, their front surfaces and the front surface of the fixing base 251 form a space with a teardrop or U-shaped cross-section, and the bendable area 31 of the flexible screen 30 is bent to form a teardrop-shaped cross-section.

[0033] The two frames 21 of the electronic device 100 are respectively connected to the two connectors 256 of the rotating shaft device 22. When the frame 21 rotates relative to the fixed base 251, the connecting member 256 drives the rotating member 254, the driven member 261 and the positioning member 271 to rotate relative to the fixed base 251. At the same time, the rotating member 254, the driven member 261 and the positioning member 271 slide and rotate relative to the side support member 233, and the connecting member 256 rotates relative to the side support member 233, so that the side support member 233 can be bent or unfolded relative to the fixed base 251. The flexible screen 30 bends or unfolds with the support mechanism 23. The bendable area 31 can be bent into a U-shape, a teardrop shape or other shapes. Specifically, when the two frames 21 rotate relative to the fixed base 251 to drive the two connectors 256 to move closer together, the two rotating members 254 rotate relative to the fixed base 251 and the corresponding connectors 256 respectively and move closer together. At the same time, the rotating members 254 slide and rotate relative to the corresponding side support members 233; the two driven members 261 rotate relative to the fixed base 251 and move closer together. At the same time, the end of the driven member 261 away from the fixed base 251 slides and rotates relative to the connectors 256 and the side support members 233, so that the two side support members 233 fold together to realize the flexible screen 30. Folding; when the two frames 21 rotate relative to the fixed base 251 to drive the two connectors 256 away from each other, the two rotating members 254 rotate relative to the fixed base 251 and the corresponding connectors 256 respectively and move away from each other. At the same time, the rotating members 254 slide and rotate relative to the corresponding side support members 233. The two driven members 261 rotate relative to the fixed base 251 and move away from each other. At the same time, the end of the driven member 261 away from the fixed base 251 slides and rotates relative to the connectors 256 and the side support members 233, so that the two side support members 233 move away from each other to realize the unfolding of the flexible screen 30. In this embodiment, the bendable area 31 of the flexible screen 30 can be bent into a teardrop shape.

[0034] In this embodiment, the front side refers to the side facing the same direction as the light-emitting surface of the flexible screen 30, and the back side refers to the side facing away from the light-emitting surface of the flexible screen 30. The electronic device 100 is, for example, but not limited to, mobile phones, tablets, monitors, LCD panels, OLED panels, televisions, smartwatches, VR headsets, automotive displays, and any other products and components with display functions. In the description of this embodiment, "connection" includes both direct and indirect connections. For example, a connection between A and B includes a direct connection between A and B or a connection through a third element C or more other elements. Connections also include integrated connections and non-integrated connections. An integrated connection means that A and B are formed and connected as a single unit, while a non-integrated connection means that A and B are not formed and connected as a single unit.

[0035] The rotating shaft device 22 of the electronic device 100 of the present invention includes a support mechanism 23, a rotating assembly 25, a driven assembly 26, and a positioning mechanism 27. The rotating member 254 of the rotating assembly 25 is rotatably connected to the fixed base 251 and the connecting member 256 at opposite ends, and the rotating member 254 is slidably and rotatably connected to the side support member 233. One end of the driven member 261 is rotatably connected to the fixed base 251, and the other end of the driven member 261 is slidably and rotatably connected to the connecting member 256 and the side support member 233. One end of the positioning member 271 is rotatably connected to the fixed base 251, and the other end of the positioning member 271 is slidably connected to the connecting member 256 and the other end of the positioning member 271 is slidably and rotatably connected to the side support member 233. As the two frames 21 move closer or further apart, the connector 256 drives the rotating member 254, the driven member 261, and the positioning member 271 to rotate relative to the fixed base 251, and the connector 256 rotates relative to the side support member 233, so as to drive the two side support members 233 to fold or unfold relative to each other, thereby realizing the folding or unfolding of the flexible screen 30. First, the side support 233 is rotatably connected to the connector 256, and the side support 233 is slidably and rotatably connected to the rotating member 254, the driven member 261, and the positioning member 271. This allows the side support 233 to be simultaneously constrained by the movement of the rotating member 254, the driven member 261, and the positioning member 271, thus stabilizing the folding or unfolding process of the rotating shaft device 22, improving the flexibility of folding or unfolding the rotating shaft device 22, facilitating the bending or unfolding of the rotating shaft device 22, and improving the accuracy of the rotating shaft device 22 during the folding or unfolding process. Second, the rotating shaft device 22 has a compact structure, resulting in a smaller overall width, thereby reducing the internal space occupied by the rotating shaft device 22 in the folding housing 20. This is not only beneficial for the layout of other components such as the motherboard or battery, but also for miniaturization. In addition, the rotating shaft device 22 has a simple structure, low manufacturing cost, and high reliability of the connection between the components, thus improving the overall strength of the device.

[0036] The rotating shaft device 22 in this embodiment includes a rotating component 25, a pair of driven components 26 and a pair of positioning mechanisms 27; the rotating component 25, the driven components 26 and the positioning mechanisms 27 constitute an integral structure, which is disposed on the back of the support mechanism 23.

[0037] In some embodiments, the rotating shaft device 22 may also include two rotating components 25, two pairs of driven components 26 and two pairs of positioning mechanisms 27. Each rotating component 25, one pair of driven components 26 and one pair of positioning mechanisms 27 constitute an integral structure. That is, the two rotating components 25, the two pairs of driven components 26 and the two pairs of positioning mechanisms 27 constitute two integral structures. The two integral structures are respectively disposed at opposite ends of the back of the support mechanism 23.

[0038] In some embodiments, the rotating shaft device 22 may also include three or more rotating components 25, three or more pairs of driven components 26, and three or more pairs of positioning mechanisms 27. Each rotating component 25, one pair of driven components 26, and one pair of positioning mechanisms 27 constitute an integral structure. That is, three or more rotating components 25, three or more pairs of driven components 26, and three or more pairs of positioning mechanisms 27 constitute three or more integral structures. The three or more integral structures are respectively disposed on the back of the support mechanism 23 and are spaced apart along the length direction of the support mechanism 23.

[0039] like Figures 1 to 4 As shown, the connecting parts 256 on both sides of the rotating shaft device 22 are fixedly connected to the two frames 21 respectively. When one frame 21 is folded or unfolded relative to the other frame 21, it can drive the corresponding rotating mechanism 253 to rotate relative to the fixed seat 251. The rotating mechanism 253 drives the driven part 261 and the positioning part 271 to rotate relative to the fixed seat 251, so as to drive the two side support parts 233 to rotate and slide relative to the fixed seat 251 until the two side support parts 233 are bent into a teardrop shape or unfolded into a horizontal shape. The bendable area 31 of the flexible screen 30 is folded into a teardrop shape or unfolded into a horizontal shape along with the bendable area 31.

[0040] like Figures 2-4 As shown, the frame 21 includes a front face 211, a back face 213, two opposite sides 214, and two end faces 215. A pivot device 22 connects the two adjacent end faces 215 of the two frames 21. The bendable area 31 of the flexible screen 30 is attached to the front face of the pivot device 22, and the non-bendable area 33 of the flexible screen 30 is connected to the front face 211 of the frame 21. Each frame 21 has a receiving groove 216 on its end face 215 facing the pivot device 22. The receiving groove 216 passes through the front face 211 of the frame 21, and its opposite ends extend to the opposite sides 214 of the frame 21. The opposite sides of the pivot device 22 are respectively accommodated in the receiving grooves 216 of the two frames 21, and each connector 256 is fixedly connected to the corresponding frame 21. A locking part 217 is provided on the side of the frame 21 near the pivot device 22. When the two frames 21 are in a fully folded state, the side support member 233 is positioned by the locking part 217. In this embodiment, the locking part 217 is a slot on the surface of the receiving groove 216 of the frame 21 facing the side support member 233; preferably, the frame 21 does not have several slots, and several slots are arranged at intervals along the length direction of the side support member 233; in this embodiment, the frame 21 has three locking parts 217, of which two locking parts 217 are located at opposite ends of the surface, and the other locking part 217 is located in the middle of the surface. The back side 213 of the frame 21 has several receiving spaces (not shown in the figure), which are used to install electronic devices such as circuit boards and batteries.

[0041] Please refer to the following: Figures 5 to 8 The side support 233, away from the fixed base 251, is connected to the connector 256 via a first arc groove and a first arc rail. The axis of the first arc groove is collinear with the axis of rotation between the side support 233 and the connector 256. The first arc groove is located on one of the side support 233 and the connector 256, and the first arc rail is located on the other of the connector 256 and the side support 233. In this embodiment, the side support 233 is provided with a first arc groove 2332, and the connector 256 is provided with a first arc rail 2562. The first arc rail 2562 is slidably inserted into the first arc groove 2332. Specifically, the side support member 233 includes a rectangular side support plate 2330, which has a front facing the flexible screen 30 and a back facing away from the flexible screen 30. A first protrusion 2331 is provided on the back of the side support member 233, and a first arc groove 2332 is provided on the first protrusion 2331. The connector 256 has a first arc rail 2562 that can be slidably inserted into the first arc groove 2332. The connector 256 and the side support member 233 rotate relative to each other along the axis of the first arc groove 2332. Further, the first protrusion 2331 protrudes from one end of the back of the side support plate 2330, and the first arc groove 2332 is formed on the side of the first protrusion 2331. One end of the first arc groove 2332 penetrates the surface of the first protrusion 2331 facing away from the fixing base 251, and the other end of the first arc groove 2332 extends to the back of the side support plate 2330. The first arc groove 2332 bends away from the back side of the side support plate 2330. Specifically, the middle part of the first arc groove 2332 bends away from the back side of the side support plate 2330. The side support member 233 is provided with a first protrusion 2331 at at least one end of the connector 256. The first protrusion 2331 is provided with the first arc groove 2332 on the side facing the connector 256. The end face of the connector 256 facing the first protrusion 2331 is provided with a first arc rail 2562. The first arc rail 2562 is slidably inserted into the first arc groove 2332.

[0042] In some embodiments, the side support member 233 is provided with first protrusions 2331 at the opposite ends of the connector 256, and the two sides facing the two first protrusions 2331 are provided with first arc grooves 2332. The axis lines of the two first arc grooves 2332 are collinear, and one end of the first arc groove 2332 passes through the surface of the first protrusion 2331 away from the fixed base 251. The two opposite ends of the connector 256 are provided with first arc rails 2562, and the two first arc rails 2562 are slidably accommodated in the two first arc grooves 2332.

[0043] In some embodiments, the side support member 233 is provided with first protrusions 2331 at the opposite ends of the connector 256, and the two sides facing the two first protrusions 2331 are provided with first arc rails 2562, and the axis lines of the two first arc rails 2562 are collinear; the two opposite ends of the connector 256 are provided with first arc grooves 2332, and the two first arc rails 2562 are slidably accommodated in the two first arc grooves 2332.

[0044] In some embodiments, the connector 256 is provided with two or more first arc rails 2562, the axis lines of the two or more first arc rails 2562 are collinear, and the side support 233 is provided with two or more first arc grooves 2332 respectively corresponding to the two or more first arc rails 2562, and the two or more first arc rails 2562 are rotatably accommodated in the two or more first arc grooves 2332 respectively.

[0045] The rotating member 254 and the side support member 233 are slidably and rotatably connected by the cooperation of the first limiting groove 2333 and the first limiting part 2540. The first limiting groove 2333 is provided in one of the side support member 233 and the rotating member 254, and the first limiting part 2540 is provided in the other of the rotating member 254 and the side support member 233. In this embodiment, the first limiting groove 2333 is provided on the side of the first protrusion 2331 of the side support member 233 near the fixed base 251, and the first limiting groove 2333 passes through the two opposite sides of the first protrusion 2331. The first limiting groove 2333 bends and extends away from the side support plate 2330, that is, the first end of the first limiting groove 2333 is close to the back of the side support plate 2330 and the fixing seat 251, the opposite second end of the first limiting groove 2333 is away from the back of the side support plate 2330 and the fixing seat 251, and the middle part of the first limiting groove 2333 bends away from the side support plate 2330, that is, the first limiting groove 2333 is formed by bending and extending from the first end to the second end.

[0046] Preferably, the first limiting groove 2333 includes a first limiting segment 2333a and a second limiting segment 2333b located at opposite ends thereof. The first limiting segment 2333a is closer to the fixing base 251 than the second limiting segment 2333b, that is, the first limiting segment 2333a is located at the first end of the first limiting groove 2333, and the second limiting segment 2333b is located at the second end of the first limiting groove 2333. When the two side supports 233 are in a flattened state, the first limiting part 2540 is positioned at the second limiting segment 2333b (e.g., ...). Figure 16 (as shown), to prevent the side support members 233 from folding back and damaging the flexible screen 30; when the two side support members 233 are in a fully folded state, the first limiting part 2540 is positioned at the first limiting segment 2333a (as shown). Figure 28(As shown), to prevent the side support members 233 from further folding and damaging the flexible screen 30. In this embodiment, the first limiting part 2540 is a first limiting shaft connected to the rotating member 254 and passing through the first limiting groove 2333. The first limiting shaft can roll in the first limiting groove 2333 and can be limited to the first limiting segment 2333a or the second limiting segment 2333b; that is, when the first limiting shaft is limited to the first limiting segment 2333a, the two side support members 233 remain in a fully folded state; when the first limiting shaft is limited to the second limiting segment 2333b, the two side support members 233 remain in a flattened state. In some embodiments, the first limiting groove 2333 on the first protrusion 2331 may also extend obliquely to the side away from the fixing seat 251. The first limiting segment 2333a and the second limiting segment 2333b are located at opposite ends of the first limiting groove 2333, and the first limiting segment 2333a is further away from the fixing seat 251 than the second limiting segment 2333b.

[0047] In some embodiments, the first limiting portion 2540 on the rotating member 254 and the first limiting groove 2333 on the side support member 233 can be interchanged. Specifically, the first limiting groove 2333 is provided on the end face of the rotating member 254 facing the first protrusion 2331, and the first limiting portion 2540 is provided on the side face of the first protrusion 2331 facing the rotating member 254. The first limiting portion 2540 slides and rotates through the first limiting groove 2333.

[0048] The side support member 233 has a positioning part 2334 at one end opposite to the fixing base 251. The positioning part 2334 is used to detachably connect to the engaging part 217 of the frame 21. When the two frames 21 are in a fully folded state, the positioning part 2334 of the side support member 233 is engaged with the engaging part 217 of the corresponding frame 21 to improve the overall reliability of the electronic device 100. When the electronic device 100 is dropped, the components of the rotating shaft device 22 will not be displaced relative to each other, and the frame 21 will not be displaced relative to the rotating shaft device 22, so as to prevent the rotating shaft device 22 and the frame 21 from squeezing the flexible screen 30 and to protect the flexible screen 30. Specifically, the positioning part 2334 is a positioning block provided at the end of the first protrusion 2331 opposite to the fixing base 251. When the two frames 21 are in a fully folded state, the positioning block is engaged with the corresponding engaging part 217, that is, the positioning block is engaged in the corresponding slot.

[0049] In some embodiments, the positioning portion 2334 on the first protrusion 2331 and the engaging portion 217 on the frame 21 can be interchanged. Specifically, the engaging portion 217 is provided at the end of the first protrusion 2331 away from the fixing seat 251, and the positioning portion 2334 corresponding to the engaging portion 217 is provided on the frame 21. When the two frames 21 are in a fully folded state, the positioning portion 2334 and the engaging portion 217 are engaged in a stop-fitting manner.

[0050] like Figure 7 and Figure 8 As shown, the driven member 261 and the side support member 233 are slidably and rotatably connected by the cooperation of the second limiting groove and the second limiting part. The first limiting groove is provided in one of the driven member 261 and the side support member 233, and the second limiting part is provided in the other of the driven member 261 and the side support member 233. In this embodiment, the side support member 233 is provided with a second limiting groove 2335, and the driven member 261 is provided with a second limiting part 263 corresponding to the second limiting groove 2335. The second limiting part 263 is slidably and rotatably inserted into the second limiting groove 2335. Specifically, a second protrusion 2336 is provided on the back of the side support plate 2330 corresponding to the follower 261. A second limiting groove 2335 is provided on the second protrusion 2336. A second limiting part 263 is a second limiting shaft connected to the end of the follower 261 away from the fixed base 251 and inserted into the second limiting groove 2335. The second limiting shaft is slidably and rotatably inserted into the second limiting groove 2335. The second limiting groove 2335 passes through the two opposite sides of the second protrusion 2336. The second limiting groove 2335 bends away from the side support plate 2330, that is, the two opposite ends of the second limiting groove 2335 are close to the back of the side support plate 2330, and the middle part of the second limiting groove 2335 bends away from the side support plate 2330. Preferably, the second protrusion 2336 is an arc-shaped block, and the second limiting groove 2335 extends along the arc-shaped block. The two opposite ends of the second limiting groove 2335 extend to near the opposite ends of the arc-shaped block. The end face of the second protrusion 2336 facing the fixing base 251 and the end face away from the fixing base 251 are both arc-shaped surfaces. Specifically, the second limiting groove 2335 includes a third limiting segment 2335a and a fourth limiting segment 2335b located at its opposite ends, and a connecting segment 2335c connecting the third limiting segment 2335a and the fourth limiting segment 2335b. The first limiting segment 2333a is closer to the fixing base 251 than the second limiting segment 2333b. When the two side supports 233 are in a flattened state, the second limiting part 263 (i.e., the second limiting shaft) is positioned at the fourth limiting segment 2335b (e.g., ...). Figure 23 As shown), to prevent the side support members 233 from folding back and damaging the flexible screen 30; when the two side support members 233 are in a fully folded state, the second limiting part 263 (i.e., the second limiting shaft) is positioned at the third limiting segment 2335a (as shown). Figure 35As shown), to prevent the side support members 233 from further folding and damaging the flexible screen 30. In this embodiment, the second limiting shaft can roll in the second limiting groove 2335 and can be limited to the third limiting segment 2335a or the fourth limiting segment 2335b; that is, when the second limiting shaft is limited to the third limiting segment 2335a, the two side support members 233 remain in a fully folded state; when the second limiting shaft is limited to the fourth limiting segment 2335b, the two side support members 233 remain in a flattened state.

[0051] In some embodiments, the second limiting groove 2335 may be provided on the side of the follower 261 facing the second protrusion 2336, and the second limiting part 263 may be provided on the side of the second protrusion 2336 facing the follower 261. The second limiting part 263 slides and rotates through the second limiting groove 2335.

[0052] The second protrusion 2336 has a positioning part 2334 at the end opposite to the fixing base 251. The positioning part 2334 is used to detachably connect to the engaging part 217 of the frame 21. When the two frames 21 are fully folded, the positioning part 2334 on the second protrusion 2336 and the corresponding engaging part 217 on the frame 21 are engaged to improve the overall reliability of the electronic device 100. Specifically, the positioning part 2334 is a positioning block provided at the end of the second protrusion 2336 opposite to the fixing base 251. When the two frames 21 are in a fully folded state, the positioning block is engaged with the corresponding engaging part 217, that is, the positioning block is engaged in the corresponding slot.

[0053] In some embodiments, the positioning portion 2334 on the second protrusion 2336 and the engaging portion 217 on the frame 21 can be interchanged. Specifically, the engaging portion 217 is provided at one end of the second protrusion 2336 away from the fixing seat 251, and the positioning portion 2334 corresponding to the engaging portion 217 is provided on the frame 21. When the two frames 21 are in a fully folded state, the positioning portion 2334 and the engaging portion 217 are engaged.

[0054] The driven member 261 and the connecting member 256 are slidably and rotatably connected by a third limiting groove and a third limiting part. The third limiting groove is provided on one of the driven member 261 and the connecting member 256, and the third limiting part is provided on the other of the driven member 261 and the connecting member 256. In this embodiment, the connecting member 256 is provided with a third limiting groove 2561, and the driven member 261 is provided with a third limiting part 265 corresponding to the third limiting groove 2561. The third limiting part 265 is slidably and rotatably inserted into the third limiting groove 2561. Specifically, the third limiting part 265 is a third limiting shaft connected to the end of the driven member 261 away from the fixed base 251 and inserted into the third limiting groove 2561. The third limiting shaft is slidably and rotatably inserted into the third limiting groove 2561. The third limiting groove 2561 bends away from the side support plate 2330. Specifically, the third limiting groove 2561 includes a fifth limiting segment 2561a and a sixth limiting segment 2561b located at opposite ends, with the fifth limiting segment 2561a closer to the fixing seat 251 than the sixth limiting segment 2561b. When the two side supports 233 are in a flattened state, the third limiting part 265 (i.e., the third limiting shaft) is positioned at the sixth limiting segment 2561b (e.g., ...). Figure 24 As shown), to prevent the side support members 233 from folding back and damaging the flexible screen 30; when the two side support members 233 are in a fully folded state, the third limiting part 265 (i.e., the third limiting axis) is positioned at the fifth limiting segment 2561a (as shown). Figure 36 As shown), to prevent the side support members 233 from further folding and damaging the flexible screen 30. In this embodiment, the third limiting shaft can roll in the third limiting groove 2561 and can be limited to the fifth limiting segment 2561a or the sixth limiting segment 2561b; that is, when the third limiting shaft is limited to the fifth limiting segment 2561a, the two side support members 233 remain in a fully folded state; when the third limiting shaft is limited to the sixth limiting segment 2561b, the two side support members 233 remain in a flattened state. In this embodiment, both the second limiting groove 2335 and the third limiting groove 2561 are bent away from the side support plate 2330, and the curvature of the second limiting groove 2335 is greater than that of the third limiting groove 2561.

[0055] like Figures 7-9As shown, the positioning member 271 and the side support member 233 are slidably and rotatably connected by a fourth limiting groove and a fourth limiting part. The fourth limiting groove is provided in one of the positioning member 271 and the side support member 233, and the fourth limiting part is provided in the other of the positioning member 271 and the side support member 233. In this embodiment, the side support member 233 is provided with a fourth limiting groove 2337 corresponding to the positioning member 271, and the positioning member 271 is provided with a fourth limiting part 272 that is slidably and rotatably inserted into the fourth limiting groove 2337. Specifically, a third protrusion 2338 is provided on the back of the side support plate 2330 near the positioning member 271. A fourth limiting groove 2337 is provided on the side of the third protrusion 2338. A fourth limiting part 272 is a fourth limiting shaft connected to the end of the positioning member 271 away from the fixed seat 251 and inserted into the fourth limiting groove 2337. The fourth limiting shaft is slidably and rotatably inserted into the fourth limiting groove 2337. The fourth limiting groove 2337 bends and extends away from the side support plate 2330. That is, the end of the fourth limiting groove 2337 near the fixed seat 251 is close to the side support plate 2330 and the fixed seat 251, and the other end away from the fixed seat 251 is away from the side support plate 2330. The middle part of the fourth limiting groove 2337 bends away from the side support plate 2330. Preferably, the third protrusion 2338 is an arc-shaped block, and the fourth limiting groove 2337 extends along the arc-shaped block, with its opposite ends extending close to the opposite ends of the arc-shaped block; the end face of the third protrusion 2338 facing the fixing base 251 and the end face away from the fixing base 251 are both arc-shaped surfaces. Further, the fourth limiting groove 2337 includes a seventh limiting segment 2337a and an eighth limiting segment 2337b located at its opposite ends, and a connecting segment 2337c connecting the seventh limiting segment 2337a and the eighth limiting segment 2337b, with the seventh limiting segment 2337a closer to the fixing base 251 than the eighth limiting segment 2337b. When the two side supports 233 are in a flattened state, the fourth limiting part 272 (i.e., the fourth limiting shaft) is positioned at the eighth limiting segment 2337b (e.g., ...). Figure 20 As shown), to prevent the side support members 233 from folding back and damaging the flexible screen 30; when the two side support members 233 are in a fully folded state, the fourth limiting part 272 (i.e., the fourth limiting axis) is positioned at the seventh limiting segment 2337a (as shown). Figure 32 As shown), to prevent the side support members 233 from further folding and damaging the flexible screen 30. In this embodiment, the second limiting shaft can roll in the second limiting groove 2335 and can be limited to the seventh limiting segment 2337a or the eighth limiting segment 2337b; that is, when the fourth limiting shaft is limited to the seventh limiting segment 2337a, the two side support members 233 remain in a fully folded state; when the fourth limiting shaft is limited to the eighth limiting segment 2337b, the two side support members 233 remain in a flattened state.

[0056] The third protrusion 2338 has a positioning part 2334 at the end opposite to the fixing base 251. The positioning part 2334 is used to detachably connect to the engaging part 217 of the frame 21. When both frames 21 are fully folded, the positioning part 2334 on the third protrusion 2338 is engaged with the corresponding engaging part 217 of the frame 21 to improve the overall reliability of the electronic device 100. Specifically, the positioning part 2334 is a positioning block provided at the end of the third protrusion 2338 opposite to the fixing base 251. When the two frames 21 are in a fully folded state, the positioning block is engaged with the corresponding engaging part 217, that is, the positioning block is engaged in the corresponding slot.

[0057] In some embodiments, the positioning portion 2334 on the third protrusion 2338 and the engaging portion 217 on the frame 21 can be interchanged. Specifically, the engaging portion 217 is provided at the end of the third protrusion 2338 away from the fixing seat 251, and the positioning portion 2334 corresponding to the engaging portion 217 is provided on the frame 21. When the two frames 21 are in a fully folded state, the positioning portion 2334 and the engaging portion 217 are engaged in a stop-fitting manner.

[0058] The third protrusion 2338 has an abutment 2338a at one end of its fourth limiting groove 2337 near the fixing seat 251. The abutment 2338a is used to abut one end of the fourth limiting part 272. Preferably, the abutment 2338a has a guide surface 2338b at the end away from the fixing seat 251. The guide surface 2338b helps the end of the fourth limiting part 272 slide along the guide surface 2338b to abut the abutment 2338a, or helps the end of the fourth limiting part 272 slide along the guide surface 2338b to disengage from the abutment of the abutment 2338a.

[0059] like Figures 7 to 9 As shown, a latching part 2339 is provided on the back of the side support plate 2330 near the third protrusion 2338. When the two frames 21 are fully folded, the two side support members 233 are fully folded. The end face of the positioning member 271 away from the fixed base 251 is engaged with the latching part 2339 to prevent the side support plate 2330 from moving relative to the fixed base 251, thereby improving the overall reliability of the electronic device 100. Specifically, the locking part 2339 is a stop block protruding from the back of the side support plate 2330 near the third protrusion 2338. The stop block includes a stop surface 2339a facing away from the fixed seat 251 and a guide surface 2339b facing the fixed seat 251. The stop surface 2339a is used to stop the end face of the positioning member 271 away from the fixed seat 251, and the guide surface 2339b facilitates the movement of the positioning member 271 relative to the locking part 2339. Preferably, the stop surface 2339a is approximately perpendicular to the back of the side support plate 2330.

[0060] The side support plate 2330 has a first clearance groove 2330a and a second clearance groove 2330b on the side near the fixed base 251. The first clearance groove 2330a is near the first protrusion 2331, and the second clearance groove 2330b is near the third protrusion 2338. The first clearance groove 2330a is used to avoid the rotating part 254, and the second clearance groove 2330b is used to avoid the pushing part. The blocking part 2339 is located near the side of the second clearance groove 2330b away from the fixed base 251.

[0061] Please refer to the following: Figures 10-13 The rotating component 254 and the fixed base 251 are connected by the cooperation of the second arc groove 2511 and the second arc rail 2541. The axis of the second arc groove 2511 is collinear with the axis of rotation between the rotating component 254 and the fixed base 251. The second arc groove 2511 is provided on one of the fixed base 251 and the rotating component 254, and the second arc rail 2541 is provided on the other of the rotating component 254 and the fixed base 251. In this embodiment, the fixed base 251 has a second arc groove 2511 on each of its two opposite sides. Each rotating member 254 has a second arc rail 2541 corresponding to the second arc groove 2511 at its end away from the connecting member 256, so that the rotating member 254 and the fixed base 251 can rotate relative to each other along the second arc groove 2511. The axis of the second arc groove 2511 is collinear with the axis of the second arc rail 2541, and the axis of the second arc rail 2541 is collinear with the axis of rotation between the rotating member 254 and the fixed base 251.

[0062] In some embodiments, the second arc groove 2511 on the fixed base 251 and the second arc rail 2541 on the rotating member 254 can be interchanged; for example, an arc groove can be provided on the second arc rail 2541, and an arc rail corresponding to the arc groove can be provided on the fixed base 251. The arc rail is rotatably inserted into the arc groove, and the axis of rotation of the arc groove, the axis of rotation of the arc rail, and the axis of rotation between the rotating member 254 and the fixed base 251 are collinear.

[0063] In this embodiment, the fixing base 251 is a rectangular block, including a rectangular front side 2510 and a back side opposite to the front side 2510. A second arcuate groove 2511 is provided on each of the opposite sides of one end of the front side 2510; a first transition groove 2513 is provided on each of the opposite sides of the end of the front side 2510 away from the second arcuate groove 2511, and two driven members 261 are rotatably connected to the two first transition grooves 2513 respectively; a second transition groove 2515 is provided on each of the opposite sides of the front side 2510 near the second arcuate groove 2511, and two positioning members 271 are rotatably connected to the two second transition grooves 2515 respectively. The rotation axis between the rotating member 254 and the fixing base 251 is parallel to the rotation axis between the driven member 261 and the fixing base 251, and the rotation axis between the driven member 261 and the fixing base 251 is parallel to the rotation axis between the positioning member 271 and the fixing base 251.

[0064] The end of the rotating member 254 away from the fixed base 251 is rotatably connected to the connecting member 256, and the rotating member 254 is slidably and rotatably connected to the side support member 233. Specifically, the rotating member 254 and the connecting member 256 are connected by a connecting shaft 2501 and a connecting hole 2503. The connecting shaft 2501 is provided in one of the rotating member 254 and the connecting member 256, and the connecting hole 2503 is provided in the other of the rotating member 254 and the connecting member 256. In this embodiment, the rotating member 254 includes a second arc track 2541, a connecting part 2542, and a support part 2543 connected between the second arc track 2541 and the connecting part 2542. The second arc track 2541 is rotatably connected to the fixed base 251, the connecting part 2542 is rotatably connected to the connecting member 256, and the support part 2543 is slidably and rotatably connected to the side support member 233. Specifically, the second arc track 2541 is an arc-shaped block, which is slidably inserted into the second arc groove 2511 of the fixed base 251. The first limiting part 2540 is connected to one side of the support part 2543, that is, one end of the first limiting shaft is connected to the support part 2543, and the other end of the first limiting shaft is slidably and rotatably inserted into the first limiting groove 2333 of the side support member 233. Further, the end of the connecting part 2542 away from the second arc track 2541 is provided with a shaft hole along a direction parallel to the axis of the second arc track 2541, and the connecting shaft 2501 passes through the shaft hole, the axis of the connecting shaft 2501 being parallel to the axis of the second arc track 2541. One side of the support portion 2543 is provided with a connecting hole, and one end of the first limiting portion 2540 is connected to the connecting hole; specifically, one side of the support portion 2543 is provided with a connecting cylinder, and one end of the first limiting portion 2540 is inserted into the inner cavity of the connecting cylinder. Preferably, the side of the connecting portion 2542 facing away from the second arc track 2541 forms an arc surface, which is beneficial for the rotating member 254 to rotate relative to the connecting member 256.

[0065] In some embodiments, the first limiting portion 2540 may also be integrally formed with the rotating member 254.

[0066] In some embodiments, the connecting shaft 2501 may also be disposed on the connector 256, and the connecting portion 2542 has a shaft hole corresponding to the connecting shaft 2501, and the connecting shaft 2501 is rotatably connected to the shaft hole of the connecting portion 2542. The connecting shaft 2501 may be integrally formed with the connector 256.

[0067] like Figures 11-13 As shown, the connector 256 is strip-shaped and includes a strip-shaped connecting plate 2560. The connecting plate 2560 includes a front surface 2560a facing the side support 233, a back surface facing away from the front surface 2560a, two opposing side surfaces, and two opposing end surfaces. The front surface 2560a is an inclined surface. Specifically, the thickness of the connecting plate 2560 on the side closer to the fixing seat 251 is less than the thickness on the side farther from the fixing seat 251. At least one end surface of the connecting plate 2560 is provided with a first arc track 2562. The front side of the connecting plate 2560 is provided with a first receiving groove 2563, a second receiving groove 2564, and a third receiving groove 2565. The first receiving groove 2563 and the second receiving groove 2564 are located at opposite ends of the connecting plate 2560, and the third receiving groove 2565 is located between the first receiving groove 2563 and the second receiving groove 2564. The first receiving groove 2563, the second receiving groove 2564, and the third receiving groove 2565 pass through opposite sides of the connecting plate 2560. The first receiving groove 2563 is used to accommodate the connecting portion 2542 of the rotating member 254, the second receiving groove 2564 is used to accommodate the end of the driven member 261 away from the fixed base 251, and the third receiving groove 2565 is used to accommodate the end of the positioning member 271 away from the fixed base 251. In this embodiment, the first receiving groove 2563 is located near one end of the first arc track 2562, and the connecting hole 2503 is located on one end of the connecting plate 2560 near the first arc track 2562. The connecting hole 2503 is located on the side away from the fixing base 251 and communicates with the first receiving groove 2563. The connecting plate 2560 has a third limiting groove 2561 on both sides opposite to the second receiving groove 2564 near the front face 2560a.

[0068] The positioning member 271 and the connecting member 256 are connected by a guide groove and a guide rail. The guide groove extends along a direction perpendicular to the rotation axis between the positioning member 271 and the fixed base 251. The guide groove is provided in one of the positioning member 271 and the connecting member 256, and the guide rail is provided in the other of the positioning member 271 and the connecting member 256. In this embodiment, the connecting member 256 is provided with a guide groove 2566, and the positioning member 271 is provided with a guide rail 2710 that is slidably inserted into the guide groove 2566. Specifically, the connecting plate 2560 is provided with a pair of guide grooves 2566 on the two opposite sides of the third receiving groove 2565, and the guide grooves 2566 communicate with the third receiving groove 2565. The connector 256 has a stop portion 2567 near the fixed base 251 corresponding to the positioning member 271. The connecting plate 2560 has a stop portion 2567 on one side of the third receiving groove 2565. Specifically, the stop portion 2567 is a stop groove, which connects the third receiving groove 2565 and the guide groove 2566. When the side support member 233 is fully bent relative to the fixed base 251, the first end of the fourth limiting shaft abuts against the top 2338a, so that the second end of the fourth limiting shaft is in a stop engagement with the stop portion 2567.

[0069] In some embodiments, the guide groove 2566 on the connector 256 and the guide rail 2710 on the positioning member 271 can be interchanged. Specifically, the third receiving groove 2565 of the connector 256 is provided with guide rails 2710 on opposite sides. The guide rails 2710 extend along the rotation axis line perpendicular to the positioning member 271 and the fixed seat 251. The positioning member 271 is provided with guide grooves 2566 on opposite sides at the end away from the fixed seat 251. The guide rails 2710 are slidably inserted into the corresponding guide grooves 2566.

[0070] The driven member 261 includes a first rotating part 2611, a connecting part 2613, and a supporting part 2614 connecting the first rotating part 2611 and the connecting part 2613. The first rotating part 2611 and the connecting part 2613 are located at opposite ends of the driven member 261. The first rotating part 2611 is rotatably connected to the fixed base 251. Specifically, the first rotating part 2611 is rotatably connected to the first transition groove 2513 of the fixed base 251. The first rotating part 2611 and the first transition groove 2513 can be connected by, but is not limited to, a rotating shaft, or a circular arc rail and a circular arc groove. A clearance groove 2615 is provided at the end of the driven member 261 away from the first rotating part 2611. The clearance groove 2615 is used to accommodate the second protrusion 2336. Specifically, the clearance groove 2615 is provided on the outer peripheral surface of the connecting part 2613 and extends to the supporting part 2614. The second limiting part 263 and the third limiting part 265 are connected to the connecting part 2613. Specifically, the second limiting part 263 is located in the middle of the connecting part 2613 corresponding to the clearance groove 2615, that is, the two opposite ends of the second limiting shaft are connected to the two opposite sides of the connecting part 2613 and the clearance groove 2615; the two third limiting parts 265 are respectively connected to the opposite end faces of the connecting part 2613. Preferably, the second limiting shaft and the third limiting shaft are coaxial. Further, the connecting part 2613 is a cylindrical tube. Different parts of the same limiting shaft of the second limiting part 263 and the third limiting part 265, that is, after the limiting shaft passes through the inner cavity of the cylindrical tube, the part of the limiting shaft corresponding to the clearance groove 2615 is the second limiting part 263, and the parts of the two opposite ends of the limiting shaft extending out of the opposite end faces of the connecting part 2613 are the third limiting parts 265.

[0071] The positioning component 271 includes a second rotating part 2711, a connecting part 2713, and a support part 2714 connecting the second rotating part 2711 and the connecting part 2713. The second rotating part 2711 and the connecting part 2713 are located at opposite ends of the support part 2714. The second rotating part 2711 is rotatably connected to the fixed base 251. Specifically, the second rotating part 2711 is rotatably connected to the second transition groove 2515 of the fixed base 251. The second rotating part 2711 and the second transition groove 2515 can be connected by, but is not limited to, a rotating shaft, or a circular arc rail and a circular arc groove. The connecting part 2713 is slidably connected to the guide groove 2566 of the connecting component 256. Specifically, guide rails 2710 are provided on opposite sides of the connecting part 2713, and the guide rails 2710 are slidably inserted into the guide groove 2566. In this embodiment, the connecting portion 2713 is a rectangular connecting plate, and the opposite two sides of the connecting plate are provided as guide rails 2710. The positioning member 271 has a clearance groove 2715 at one end away from the fixed base 251, which is used to accommodate the third protrusion 2338 of the side support member 233; in this embodiment, the clearance groove 2715 is located on one side of the front of the connecting plate. One end of the fourth limiting portion 272 is slidably connected to the side of the connecting portion 2713 away from the second rotating portion 2711, and one end of the fourth limiting portion 272 extends into the clearance groove 2715.

[0072] like Figure 14 and Figure 15As shown, a mounting portion is provided on the side of the positioning member 271 away from the second rotating part 2711. The mounting portion is used to connect the fourth limiting part 272. Specifically, the mounting portion includes a mounting block 2716 protruding from the front of the connecting part 2713. A guide hole 2717 is provided between the connecting part 2713 and the mounting block 2716. The guide hole 2717 extends along a direction parallel to the rotation axis of the second rotating part 2711 and passes through the opposite two end faces of the mounting block 2716. One end of the guide hole 2717 is connected to the clearance groove 2715. The fourth limiting part 272 is slidably disposed in the guide hole 2717, and the first end of the fourth limiting part 272 extends into the clearance groove 2715. A mounting groove 2718 is provided on the mounting block 2716, and the mounting groove 2718 is connected to the guide hole 2717. The positioning mechanism also includes an elastic element and a locking element 276. The elastic element has a pre-spring force, which is used to drive the second end of the fourth limiting shaft to disengage from the stop portion 2567. The locking element 276 is used to position the elastic element on the fourth limiting shaft. In this embodiment, the elastic element is a spring sleeved on the fourth limiting portion 272. The outer peripheral surface of the second end of the fourth limiting portion 272 is provided with a locking interface 2721, and the first end of the fourth limiting portion 272 extends to the clearance groove 2715. The locking element 276 is a U-shaped buckle, which engages with the locking interface 2721 of the fourth limiting portion 272. The positioning element 271 also includes a positioning portion 2719, which is located on the side of the positioning element 271 away from the fixed base 251. In this embodiment, the positioning portion 2719 is located on the positioning surface of the connecting portion 2713 opposite to the second rotating portion 2711.

[0073] When assembling the positioning mechanism 27, the elastic element 274 is placed in the mounting groove 2718, so that the inner cavity of the elastic element 274 is aligned with the guide hole 2717. The fourth limiting part 272 (i.e., the fourth limiting shaft) is inserted into the guide hole 2717 and the inner cavity of the elastic element 274 until the first end of the fourth limiting part 272 extends into the clearance groove 2715. The locking part 276 is inserted into the mounting groove 2718 and locked into the locking interface 2721 of the fourth limiting part 272, so that the elastic element 274 is compressed and squeezed between the locking part 276 and the mounting block 2716. The elastic element 274 drives the fourth limiting shaft to move along one side of the clearance groove 2715.

[0074] like Figure 10 and Figure 11 As shown, the rotating shaft device 22 also includes a back cover 28, and the back side of the fixing seat 251 is connected to the back cover 28. Specifically, the back cover 28 is a strip frame with a receiving groove 280. The back side of the fixing seat 251 is accommodated in the receiving groove 280 and fixedly connected to the back cover 28. Preferably, the back cover 28 has a mounting portion (not shown) on the inner surface of the receiving groove 280, and the fixing seat 251 is connected to the first mounting portion. The connection between the fixing seat 251 and the mounting portion can be achieved by, but is not limited to, screwing, snap-fitting, or gluing.

[0075] Please refer to the following: Figures 5-13 and Figures 16-24 When assembling the rotating shaft device 22, the ends of the connecting portions 2542 of the two rotating parts 254 away from the second arc rail 2541 are respectively housed in the first receiving grooves 2563 of the two connecting parts 256, so that the two connecting shafts 2501 are respectively inserted into the shaft holes and corresponding connecting holes 2503 of the two connecting portions 2542, so that the two rotating parts 254 are rotatably connected to the two connecting parts 256; the second arc rails 2541 of the two rotating parts 254 are respectively housed in the two second arc grooves 2511 of the fixed base 251, so that the rotating parts 254 are rotatably connected to the fixed base 256. 1; The first rotating parts 2611 of the two driven members 261 are rotatably connected to the two first transition grooves 2513 of the fixed base 251, and the two connecting parts 2613 are respectively accommodated in the second receiving grooves 2564 of the two connecting members 256; The second rotating parts 2711 of the two positioning members 271 are rotatably connected to the two second transition grooves 2515 of the fixed base 251, the two connecting parts 2713 are respectively accommodated in the third receiving grooves 2565 of the two connecting members 256, and the guide rails 2710 of the positioning members 271 are slidably inserted into the corresponding guide grooves 2566. Two side support members 233 are placed on opposite sides of the front of the fixed base 251. The rotating member 254, the driven member 261, and the positioning member 271 are located on the back of the side support plate 2330. The first arc rails 2562 of the two connecting members 256 are slidably accommodated in the corresponding first arc grooves 2332. The first limiting parts 2540 of the two rotating members 254 are respectively inserted into the first limiting grooves 2333 of the two side support members 233. The two second protrusions 2336 are respectively accommodated in the avoidance of the two driven members 261. The second limiting part 263 passes through the second limiting groove 2335 of the second protrusion 2336 and is connected to the connecting part 2613. One end of the third limiting part 265 is inserted into the corresponding third limiting groove 2561, and the other end of the third limiting part 265 is connected to the connecting part 2613. The two third protrusions 2338 are respectively accommodated in the clearance grooves 2715 of the two positioning members 271, and the first end of the fourth limiting part 272 is slidably inserted into the second limiting groove 2335. The fixing seat 251 is placed in the back cover 28, and the fixing seat 251 is respectively connected to the back cover 28.

[0076] When the two side supports 233 are flattened, the front surfaces of the two side supports 233 are coplanar with the front surfaces of the fixed base 251. The first arc track 2562 is rotatably accommodated in the corresponding first arc groove 2332. The first limiting part 2540 is positioned in the second limiting segment 2333b of the first limiting groove 2333. The second limiting part 263 is positioned in the fourth limiting segment 2335b of the second limiting groove 2335. The third limiting part 265 is positioned in the sixth limiting segment 2561b of the third limiting groove 2561. The fourth limiting part 272 is positioned in the eighth limiting segment 2337b of the fourth limiting groove 2337. When the two side supports 233 are fully folded, the front of the two side supports 233 and the front of the fixed base 251 together form a teardrop-shaped space. The first arc track 2562 is rotatably accommodated in the corresponding first arc groove 2332. The first limiting part 2540 is positioned in the first limiting segment 2333a of the first limiting groove 2333. The second limiting part 263 is positioned in the third limiting segment 2335a of the second limiting groove 2335. The third limiting part 265 is positioned in the fifth limiting segment 2561a of the third limiting groove 2561. The fourth limiting part 272 is positioned in the seventh limiting segment 2337a of the fourth limiting groove 2337.

[0077] When the connector 256 drives the rotating member 254, the driven member 261 and the positioning member 271 to rotate relative to the fixed base 251, at the same time, the rotation of the rotating mechanism 253, the driven member 261 and the positioning member 271 drives the side support member 233 to rotate and slide relative to the fixed base 251, so that the two side support members 233 bend or unfold relative to each other. Specifically, the rotating member 254 rotates relative to the fixed base 251 via the second arc track 2541 and the second arc groove 2511; the first rotating part 2611 of the driven member 261 rotates relative to the fixed base 251, while the second limiting part 263 on the connecting part 2613 of the driven member 261 slides and rotates in the second limiting groove 2335, and the third limiting part 265 on the connecting part 2613 slides and rotates in the third limiting groove 2561; the second rotating part 2711 of the positioning member 271 rotates relative to the fixed base 251, and the guide rail 2710 of the positioning member 271 slides in the corresponding guide groove 2566, and the first end of the fourth limiting part 272 slides and rotates in the fourth limiting groove 2337, so as to drive the two side support members 233 to move relative to the fixed base 251, so as to realize the mutual bending or mutual unfolding of the two side support members 233.

[0078] like Figures 16-36When the rotating shaft device 22 is bent from its flattened state, one of the connecting members 256 is bent relative to the fixed base 251 toward the other connecting member 256. One of the connecting members 256 drives the second arc track 2541 of the rotating member 254 to rotate within the second arc groove 2511 of the fixed base 251, thus approaching the other connecting member. The first limiting part 2540 on the rotating member 254 slides and rotates within the first limiting groove 2333. Specifically, the first limiting part 2540 moves from the first... The second limiting segment 2333b of the limiting groove 2333 moves to the first limiting segment 2333a, and the first arc track 2562 rotates in the corresponding first arc groove 2332; at the same time, one of the connecting members 256 drives the first rotating part 2611 of the corresponding driven member 261 to rotate relative to the fixed base 251, so that the two driven members 261 move closer to each other, and drives the second limiting part 263 and the third limiting part 265 on the driven member 261 to move in the second limiting groove 2335 respectively. The second limiting part 263 moves from the fourth limiting segment 2335b of the second limiting groove 2335 to the third limiting segment 2335a, and the third limiting part 265 moves from the sixth limiting segment 2561b of the third limiting groove 2561 to the fifth limiting segment 2561a. One of the connecting members 256 drives the second rotating part 2711 on the positioning member 271 to rotate relative to the fixed base 251, causing the two positioning members 271 to rotate. 71 approach each other and drive the guide rail 2710 to slide into the guide groove 2566. The first end of the fourth limiting part 272 slides and rotates in the fourth limiting groove 2337. Specifically, the first end of the fourth limiting part 272 moves from the eighth limiting segment 2337b of the fourth limiting groove 2337 to the seventh limiting segment 2337a, so as to drive the two side support members 233 to approach each other until the two side support members 233 and the fixed seat 251 form a teardrop shape in cross section.

[0079] During the bending process of the side support 233 relative to the fixed base 251, the first limiting part 2540 moves from the first limiting segment 2333a of the first limiting groove 2333 to the second limiting segment 2333b, the second limiting part 263 moves from the fourth limiting segment 2335b of the second limiting groove 2335 to the third limiting segment 2335a, the third limiting part 265 moves from the sixth limiting segment 2561b of the third limiting groove 2561 to the fifth limiting segment 2561a, and the first end of the fourth limiting part 272 moves from the eighth limiting segment 2337b of the fourth limiting groove 2337 to the seventh limiting segment 2337a. The first end of the fourth limiting part 272 slides against the guide surface 2338b, causing the second end of the fourth limiting part 272 to move towards the stop part 2567. The elastic member is compressed and undergoes elastic deformation until the fourth limiting part 272... The two ends are engaged with the stop portion 2567 of the connector 256, that is, the second end of the fourth limiting portion 272 is engaged with the stop portion 2567. At this time, the positioning portion 2719 of the positioning member 271 is engaged with the stop portion 2339 of the corresponding side support member 233, so that the rotating shaft device 22 maintains a stable fully folded state. In addition, the side support member 233 is simultaneously constrained by the first limiting portion 2540 and the first limiting groove 2333, the second limiting portion 263 and the second limiting groove 2335, the third limiting portion 265 and the third limiting groove 2561, and the fourth limiting portion 272 and the fourth limiting groove 2337 during the folding process, so that the folding process of the rotating shaft device 22 is stable, the folding flexibility of the rotating shaft device 22 is improved, the bending of the rotating shaft device 22 is facilitated, and the accuracy of the rotating shaft device 22 during the folding process is improved.

[0080] In other usage methods, the two connectors 256 can be rotated together in opposite directions. Each connector 256 rotates relative to the second arc track 2541 of the corresponding rotating member 254 and the second arc groove 2511 of the fixed base 251. Simultaneously, the first limiting part 2540 on the rotating member 254 slides and rotates in the first limiting groove 2333. Specifically, the first limiting part 2540 moves from the second limiting segment 2333b to the first limiting segment 2333a of the first limiting groove 2333, and the first arc track 2562 rotates in the corresponding first arc groove 2332. At the same time, the two connectors 256 drive the first rotating part 2611 of the corresponding driven member 261 to rotate relative to the fixed base 251, causing the two driven members 261 to move closer to each other. The second limiting part 263 and the third limiting part 265 on each driven member 261 slide and rotate synchronously in the second limiting groove 2335 and the third limiting groove 2561, respectively. In this configuration, the second limiting part 263 moves from the fourth limiting segment 2335b of the second limiting groove 2335 to the third limiting segment 2335a, and the third limiting part 265 moves from the sixth limiting segment 2561b of the third limiting groove 2561 to the fifth limiting segment 2561a. Simultaneously, the two connecting members 256 drive the second rotating part 2711 on the corresponding positioning member 271 to rotate relative to the fixed base 251, causing the two positioning members 271 to move closer to each other, and also driving the positioning members 271... The guide rail 2710 is slidably inserted into the guide groove 2566. The first end of the fourth limiting part 272 on the positioning member 271 slides and rotates in the fourth limiting groove 2337. Specifically, the first end of the fourth limiting part 272 moves from the eighth limiting segment 2337b of the fourth limiting groove 2337 to the seventh limiting segment 2337a, so as to drive the two side support members 233 to move closer to each other until the two side support members 233 and the fixed seat 251 form a teardrop shape in cross section.

[0081] When the rotating shaft device 22 is unfolded from its fully bent state, one of the connecting members 256 is unfolded relative to the fixed base 251 away from the other connecting member 256. This causes the second arc track 2541 of the rotating member 254 to rotate within the second arc groove 2511 of the fixed base 251, moving away from the other connecting member 256. The first limiting part 2540 on the rotating member 254 slides and rotates in the first limiting groove 2333. Specifically, the first limiting part 2540 moves from the first limiting segment 2333a to the second limiting segment 2333b of the first limiting groove 2333, and the first arc track 2562 rotates within the corresponding first arc groove 2332. Simultaneously, the connecting member 256 causes the first rotating part 2611 of the corresponding driven member 261 to rotate relative to the fixed base 251, causing the two driven members 261 to move away from each other, and causing the second limiting part 263 and the third limiting part 265 on the driven member 261 to rotate relative to the fixed base 251, respectively. Synchronously sliding and rotating within the positioning groove 2335 and the third limiting groove 2561, specifically, the second limiting part 263 moves from the third limiting segment 2335a of the second limiting groove 2335 to the fourth limiting segment 2335b, and the third limiting part 265 moves from the fifth limiting segment 2561a of the third limiting groove 2561 to the sixth limiting segment 2561b; one of the connecting members 256 drives the second rotating part 2711 on the positioning member 271 to rotate relative to the fixed base 251, causing the two... The positioning members 271 are far apart from each other, and the guide rail 2710 is slidably inserted into the guide groove 2566. The first end of the fourth limiting part 272 slides and rotates in the fourth limiting groove 2337. Specifically, the first end of the fourth limiting part 272 moves from the seventh limiting segment 2337a to the eighth limiting segment 2337b of the fourth limiting groove 2337, so as to drive the two side support members 233 to unfold each other until the two side support members 233 and the fixed base 251 are flat.

[0082] During the flattening process of the side support 233 relative to the fixed base 251, the first limiting part 2540 moves from the second limiting segment 2333b of the first limiting groove 2333 to the first limiting segment 2333a; the second limiting part 263 moves from the third limiting segment 2335a of the second limiting groove 2335 to the fourth limiting segment 2335b; the third limiting part 265 moves from the fifth limiting segment 2561a of the third limiting groove 2561 to the sixth limiting segment 2561b; and the first end of the fourth limiting part 272 moves from the seventh limiting segment 2337a of the fourth limiting groove 2337 to the eighth limiting segment 2337b. The first end of the fourth limiting part 272 gradually disengages from the abutment of the guide surface 2338b, and the elastic element elastically resets, thereby driving the fourth limiting part 2740. The second end of 2 disengages from the stop 2567; at this time, the positioning part 2719 of the positioning member 271 disengages from the stop engagement with the corresponding side support member 2339, so as to facilitate the flattening of the rotating shaft device 22; in addition, the side support member 233 is simultaneously constrained by the first limiting part 2540 and the first limiting groove 2333, the second limiting part 263 and the second limiting groove 2335, the third limiting part 265 and the third limiting groove 2561, and the fourth limiting part 272 and the fourth limiting groove 2337 during the flattening process, so as to stabilize the flattening process of the rotating shaft device 22, improve the flexibility of the flattening of the rotating shaft device 22, facilitate the flattening of the rotating shaft device 22, and improve the accuracy of the rotating shaft device 22 during the flattening process.

[0083] In other usage scenarios, the two connectors 256 can rotate together in a direction away from each other. Each connector 256 rotates away from the fixed base 251 via the second arc track 2541 of the corresponding rotating member 254. Simultaneously, the first limiting part 2540 on the rotating member 254 slides and rotates in the first limiting groove 2333. Specifically, the first limiting part 2540 moves from the first limiting segment 2333a to the second limiting segment 2333b of the first limiting groove 2333, and the first arc track 2562 rotates in the corresponding first arc groove 2332. At the same time, the two connectors 256 drive the first rotating part 2611 of the corresponding driven member 261 to rotate relative to the fixed base 251, causing the two driven members 261 to move away from each other. The second limiting part 263 and the third limiting part 265 on each driven member 261 slide and rotate synchronously in the second limiting groove 2335 and the third limiting groove 2561, respectively. Specifically, the second limiting part 263 moves from the third limiting segment 2335a of the second limiting groove 2335 to the fourth limiting segment 2335b, and the third limiting part 265 moves from the fifth limiting segment 2561a of the third limiting groove 2561 to the sixth limiting segment 2561b; simultaneously, the two connecting members 256 drive the second rotating part 2711 on the corresponding positioning member 271 to rotate relative to the fixed base 251, causing the two positioning members 271 to move away from each other, and driving the positioning member 271 to rotate relative to the fixed base 251. The guide rail 2710 is slidably inserted into the guide groove 2566. The first end of the fourth limiting part 272 on the positioning member 271 slides and rotates in the fourth limiting groove 2337. Specifically, the first end of the fourth limiting part 272 moves from the seventh limiting section 2337a to the eighth limiting section 2337b of the fourth limiting groove 2337, so as to drive the two side support members 233 to move away from each other synchronously until the front of the two side support members 233 is flush with the front of the fixed seat 251.

[0084] In some embodiments, a linkage gear mechanism is provided between the first rotating portions 2611 of the two driven members 261. The linkage gear mechanism includes first gears and gear assemblies respectively disposed on the outer peripheral surfaces of the first rotating portions 2611. The gear assembly includes at least two second gears, and the two first gears mesh with the two first gears respectively. One driven member 261 rotates relative to the fixed base 251 to drive the first gear on one of the driven members 261 to rotate. The rotation of the first gear drives the first gear on the other driven member 261 to rotate synchronously through the gear assembly, so as to realize the synchronous folding or synchronous unfolding of the two driven members 261 relative to the fixed base 251, and the synchronous folding or synchronous unfolding of the two side support members 233.

[0085] In some embodiments, gears are respectively provided on the outer periphery of the first rotating portion 2611 of the two driven members 261, and the gears on the two first rotating portions 2611 mesh with each other. One driven member 261 rotates relative to the fixed base 251 to drive the gear on the one driven member 261 to rotate, and the rotation of the gear drives the gear on the other driven member 261 to rotate synchronously, so as to realize the synchronous folding or synchronous unfolding of the two driven members 261 relative to the fixed base 251, and the synchronous folding or synchronous unfolding of the two side support members 233.

[0086] In some embodiments, a linkage gear mechanism is provided between the second rotating portions 2711 of the two positioning members 271. The linkage gear mechanism includes a first gear and a gear assembly respectively disposed on the outer peripheral surface of the second rotating portion 2711. The gear assembly includes at least two second gears, and the two first gears mesh with the two first gears respectively. One positioning member 271 rotates relative to the fixed base 251 to drive the first gear on one of the positioning members 271 to rotate. The rotation of the first gear drives the first gear on the other positioning member 271 to rotate synchronously through the gear assembly, so as to realize the synchronous folding or synchronous unfolding of the two positioning members 271 relative to the fixed base 251, and the synchronous folding or synchronous unfolding of the two side support members 233.

[0087] In some embodiments, gears are respectively provided on the outer periphery of the second rotating portions 2711 of the two positioning members 271, and the gears on the two second rotating portions 2711 mesh with each other. One positioning member 271 rotates relative to the fixed base 251 to drive the gear on the one positioning member 271 to rotate, and the rotation of the gear drives the gear on the other positioning member 271 to rotate synchronously, so as to realize that the two positioning members 271 fold or unfold synchronously relative to the fixed base 251, and realize that the two side support members 233 fold or unfold synchronously.

[0088] In some embodiments, the rotating shaft device 22 further includes a suspension mechanism, which includes a pushing member disposed at the end of the first rotating portion 2611 of the driven member 261, a holding member abutting the pushing member, and an elastic member. The elastic member provides elastic force for mutual abutment between the holding member and the pushing member. The driven members 261 on opposite sides of the fixed seat 251 rotate relative to the fixed seat 251. The pushing member rotates with the first rotating portion 2611 relative to the holding member. The elastic member is elastically compressed and undergoes elastic deformation. The frictional resistance between the pushing member and the holding member positions the driven member 261 relative to the fixed seat 251, thereby positioning the side support member 233 relative to the fixed seat 251 at a specific angle. The specific angle ranges from 70 degrees to 130 degrees between the included angle between the two side support members 233. Specifically, when the two side supports 233 of the rotating shaft device 22 are unfolded or synchronously folded to an angle equal to or greater than 70 degrees and less than or equal to 130 degrees via the rotating assembly 25, the driven assembly 26, and the positioning mechanism 27, the friction between the pushing member and the holding member helps to position the two side supports 233, that is, the two side supports 233 do not rotate relative to each other without external force. Specifically, the pushing member includes a plurality of first cams arranged along the rotation axis of the first rotating part 2611, and the holding member includes a plurality of second cams rotatably engaged with the plurality of first cams. The first cams and second cams are rotatably abutting each other, and the elastic member elastically pushes against the holding member. When the first cam rotates relative to the second cam, the first cam rotatably pushes the second cam to slide away from or towards the first rotating part 2611, the elastic member is compressed, and the frictional resistance between the first cam and the second cam can limit the pushing member relative to the holding member to a specific angle.

[0089] In some embodiments, the rotating shaft device 22 further includes a suspension mechanism, which includes a pushing member disposed at the end of the second rotating portion 2711 of the positioning member 271, a holding member abutting the pushing member, and an elastic member. The elastic member provides elastic force for the holding member and the pushing member to abut against each other. The positioning members 271 on opposite sides of the fixed seat 251 rotate relative to the fixed seat 251. The pushing member rotates with the second rotating portion 2711 relative to the holding member. The elastic member is elastically compressed and undergoes elastic deformation. The frictional resistance between the pushing member and the holding member positions the positioning member 271 relative to the fixed seat 251, thereby positioning the side support member 233 relative to the fixed seat 251 at a specific angle. Specifically, the pushing member includes a plurality of first cams arranged along the rotation axis of the second rotating portion 2711. The holding member includes a plurality of second cams rotatably engaged with the plurality of first cams. The first cams and the second cams rotatably abut against each other. The elastic member elastically pushes against the holding member. When the first cam rotates relative to the second cam, the first cam rotatably pushes the second cam to slide away from or towards the second rotating part 2711, the elastic member is squeezed, and the frictional resistance between the first cam and the second cam can limit the pushing member relative to the holding member to a specific angle.

[0090] In some embodiments, the rotating shaft device 22 further includes two hovering mechanisms, one of which includes a pushing member disposed at the end of the first rotating portion 2611 of the driven member 261, a holding member abutting the pushing member, and an elastic member. The elastic member provides elastic force for mutual abutment between the holding member and the pushing member. The driven members 261 on both sides of the fixed seat 251 rotate relative to the fixed seat 251. The pushing member rotates with the first rotating portion 2611 relative to the holding member. The elastic member is elastically compressed and undergoes elastic deformation. The frictional resistance between the pushing member and the holding member positions the driven member 261 relative to the fixed seat 251, so as to realize that the side support member 233 is positioned at a specific angle relative to the fixed seat 251. Another hovering mechanism includes a pushing member disposed at the end of the second rotating part 2711 of the positioning member 271, a holding member abutting against the pushing member, and an elastic member. The elastic member provides elastic force for mutual abutment between the holding member and the pushing member. The positioning members 271 on opposite sides of the fixed seat 251 rotate relative to the fixed seat 251. The pushing member rotates with the second rotating part 2711 relative to the holding member. The elastic member is elastically compressed and undergoes elastic deformation. The frictional resistance between the pushing member and the holding member positions the positioning member 271 relative to the fixed seat 251, so as to realize that the side support member 233 is positioned at a specific angle relative to the fixed seat 251.

[0091] Please refer to the following: Figures 1-4The installed pivot device 22 is placed between the two frames 21. The connectors 256 on opposite sides of the back cover 28 are respectively housed in the receiving slots 216 of the two frames 21, and the two connectors 256 are respectively fixedly connected to the two frames 21. At this time, the front faces 211 of the two frames 21, the front faces of the two side support members 233, and the front faces 2311 of the fixing base 251 are coplanar. The back of the flexible screen 30 is connected to the front faces 211 of the two frames 21 and the front face of the pivot device 22. Specifically, the bendable area 31 faces the pivot device 22, and the two non-bendable areas 33 face the front faces of the two frames 21 respectively. When the flexible screen 30 is in a flattened state, the front of the fixed base 251 is flush with the front of the two side supports 233, and the two side supports 233 remain flat. Since the front of the side supports 233 is coplanar with the front of the fixed base 251, the flexible screen 30 will not be impacted by the step difference when flattened, and the flexible screen 30 will not have defects such as color spots or bright spots, ensuring the reliability of the flexible screen 30. At the same time, it also improves the touch feel of the flexible screen 30 and enhances the user experience. In addition, the rotating member 254 and the side supports 233 are connected by the first limiting part 2540 through the arc-shaped first limiting groove 2333, and the driven member 261 and the side supports 233 are connected by the second limiting part 263 through the arc-shaped second limiting groove 2335. Furthermore, the driven member 261 and the connecting member 256 are connected by the third limiting part 265 and the arc-shaped third limiting groove 2561. The positioning member 271 and the side support member 233 are connected by the fourth limiting part 272 and the arc-shaped fourth limiting groove 2337. The side support member 233 and the connecting member 256 are connected by the first arc rail 2562 and the first arc groove 2332. Therefore, the connection between the components in the rotating shaft device 22 can be made more compact, thereby reducing the overall width of the rotating shaft device 22, reducing the internal space occupied by the housing 20, which is beneficial to the layout of other components such as the motherboard or battery, and is beneficial to the miniaturization of the electronic device 100. It also makes the rotating shaft device 22 have better motion constraints and improves the stability of the rotating shaft device 22 during folding or flattening.

[0092] Please refer to the following: Figures 25-36When 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 253 connected to the two frames 21 to rotate in a direction closer to each other. The bending of the pivot device 22 is achieved through the driven component 26 and the positioning mechanism 27, and the bendable area 31 of the flexible screen 30 bends with the pivot device 22. Specifically, if a bending force is applied to one of the frames 21, the frame 21 drives the corresponding rotating component 254 to rotate relative to the fixed base 251 towards the side closer to the flexible screen 30. Specifically, the second arc track 2541 of the rotating component 254 rotates relative to the second arc groove 2511 of the fixed base 251 so that the two rotating components 254 move closer to each other; the first limiting part 2540 on the rotating component 254 slides and rotates in the first limiting groove 2333. Specifically, the first limiting part 2540 moves from the second limiting segment 2333 of the first limiting groove 2333. 333b moves to the first limiting segment 2333a; simultaneously, the connecting member 256 on one of the frames 21 drives the first rotating part 2611 of the corresponding driven member 261 to rotate relative to the fixed base 251, causing the two driven members 261 to move closer to each other, and causing the second limiting part 263 and the third limiting part 265 on the driven member 261 to slide and rotate synchronously in the second limiting groove 2335 and the third limiting groove 2561 respectively. Specifically, the second limiting part 263 moves from the fourth limiting segment 2335b of the second limiting groove 2335 to the third limiting segment 2335b. In segment 2335a, the third limiting part 265 moves from the sixth limiting segment 2561b of the third limiting groove 2561 to the fifth limiting segment 2561a; the connecting member 256 on one of the frames 21 drives the second rotating part 2711 on the positioning member 271 to rotate relative to the fixed base 251 so that the two positioning members 271 move closer to each other, and drives the guide rail 2710 to slide into the guide groove 2566. The first end of the fourth limiting part 272 slides and rotates in the fourth limiting groove 2337. Specifically, the first end of the fourth limiting part 272 moves from the sixth limiting segment 2561b of the third limiting groove 2561 to the fifth limiting segment 2561a. The eighth limiting segment 2337b of the four limiting grooves 2337 moves to the seventh limiting segment 2337a. At the same time, the connector 256 drives the first arc rail 2562 to rotate and connect to the corresponding first arc groove 2332, so as to drive the two side support members 233 to move closer to each other, so that the rotating shaft device 22 is in a bent state; the bendable area 31 of the flexible screen 30 bends with the rotating shaft device 22 until the front of the two non-bendable areas 33 of the flexible screen 30 is in contact with each other, and the bendable area 31 is bent into a teardrop shape, thereby realizing the seamless folding of the electronic device 100.

[0093] During the bending of the electronic device 100, the first end of the fourth limiting part 272 slides against the guide surface 2338b until the first end is positioned at the top 2338a. The top 2338a pushes the fourth limiting part 272 to slide along the guide hole 2717, and the elastic element is compressed until the second end of the fourth limiting part 272 is engaged with the stop part 2567 of the connector 256. At this time, the positioning part 2719 of the positioning member 271 and the corresponding stop part 2339 of the side support member 233 are engaged in a stop cooperation, and the side The positioning parts 2334 on the support member 233 are respectively engaged with the corresponding engaging parts 217 on the frame 21 to enhance the limiting effect of the rotating device 22 in the fully folded state, so that the rotating device 22 maintains a stable folded state. This improves the protection of the flexible screen 30 by the rotating device 22 when the electronic device 100 is dropped. In other words, when the electronic device 100 is dropped, the side support member 233 is less likely to shift relative to the fixed seat 251, avoiding displacement between the side support member 233 and the flexible screen 30, and improving the overall reliability of the device. Secondly, the side support member 233 is simultaneously constrained by each limiting part and the corresponding limiting groove during the folding process, increasing the movement constraint on the folding or flattening of the side support member 233, ensuring the stability of the side support member 233 during the folding or flattening process, improving the flexibility of the rotating device 22 in folding, facilitating the bending of the electronic device 100, and improving the accuracy of the electronic device 100 during the folding process. In addition, the flexible screen 30's bendable area 31 is bent into a teardrop shape, reducing the duty cycle of the bendable area 31 after bending, thereby reducing the overall thickness of the electronic device 100.

[0094] In other bending methods of the electronic device 100, bending forces can be applied to both frames 21 at the same time. The two frames 21 drive the two rotating mechanisms 253 to rotate towards the side closer to the flexible screen 30, and the bending of the electronic device 100 is achieved through the rotating shaft device 22.

[0095] When it is necessary to flatten the electronic device 100, one of the frames 21 is pulled outward, causing the two rotating mechanisms 253 connected to the two frames 21 to rotate in a direction away from each other. Specifically, an outward pulling force is applied to one of the frames 21 of the electronic device 100. This causes the corresponding rotating member 254 to rotate relative to the fixed base 251 away from the flexible screen 30, thus moving the two rotating members 254 away from each other. The driven member 261 and the positioning member 271 also rotate relative to the fixed base 251 away from the flexible screen 30, causing the two driven members 261 and the two positioning members 271 to move away from each other. The second arc track 2541 of the rotating member 254 rotates relative to the second arc groove 2511 of the fixed base 251. Simultaneously, the first limiting portion 2540 of the rotating member 254 slides and rotates in the corresponding first limiting groove 2333, and the first limiting portion 2540 moves from the first limiting segment 2333a to the second limiting segment 2333b. The second limiting portion 263 on the driven member 261... The second limiting part 263 and the third limiting part 265 slide and rotate synchronously in the second limiting groove 2335 and the third limiting groove 2561, respectively. That is, the second limiting part 263 moves from the third limiting segment 2335a of the second limiting groove 2335 to the fourth limiting segment 2335b, and at the same time, the third limiting part 265 moves from the fifth limiting segment 2561a of the third limiting groove 2561 to the sixth limiting segment 2561b. The first end of the fourth limiting part 272 of the positioning member 271 slides and rotates in the fourth limiting groove 2337. Specifically, the first end of the fourth limiting part 272 moves from the seventh limiting segment 2337a of the fourth limiting groove 2337 to the eighth limiting segment 2337b. This causes the two side support members 233 to move away from each other and unfold, so that the rotating shaft device 22 unfolds, and the bendable area 31 of the flexible screen 30 unfolds with the rotating shaft device 22 until the flexible screen 30 is flattened.

[0096] During the flattening process of the electronic device 100, each limiting part slides and rotates in the corresponding limiting groove, thereby increasing the motion constraint on the side support 233, stabilizing the position of the rotating shaft device 22 during the flattening process, and improving the accuracy of the electronic device 100 during the flattening process.

[0097] In other bending methods of the electronic device 100, an outward pulling force can be applied to both frames 21 at the same time. The two frames 21 respectively drive the two rotating mechanisms 253, the two driven members 261 and the two positioning members 271 to rotate relative to the side away from the flexible screen 30, and the electronic device 100 can be unfolded through the rotating shaft device 22.

[0098] The rotating shaft device 22 of the electronic device 100 of the present invention achieves bending or unfolding through a rotating assembly 25, a driven assembly 26, and a positioning mechanism 27. This is because the rotating member 254 and the side support member 233 are slidably and rotatably connected through the cooperation of an arc-shaped first limiting groove 2333 and a first limiting part 2540; the driven member 261 and the side support member 233 are slidably and rotatably connected through the cooperation of an arc-shaped second limiting groove 2335 and a second limiting part 263; and the driven member 261 and the connecting member 256 are slidably and rotatably connected through an arc-shaped third limiting groove 2561 and a third limiting part 2540. The slidable and rotatable connection between the positioning part 265 and the side support part 233, the slidable and rotatable connection between the positioning part 271 and the side support part 233 via the arc-shaped fourth limiting groove 2337 and the fourth limiting part 272, and the rotatable connection between the side support part 233 and the connecting part 256 via the first arc track 2562 and the first arc groove 2332; therefore, the connection between the components in the rotating shaft device 22 can be made more compact, thereby reducing the overall width of the rotating shaft device 22, reducing the internal space occupied by the housing 20, and facilitating the layout of other components such as the motherboard or battery. Secondly, the aforementioned limiting grooves cooperate with the limiting parts respectively, enhancing the motion constraint of the rotating shaft device 22, making the position of the rotating shaft device 22 stable during folding or flattening, improving the accuracy of the rotating shaft device 22 during folding or flattening, and increasing the flexibility of the rotating shaft device 22 during folding, making it convenient for bending or flattening the rotating shaft device 22. Furthermore, when the electronic device 100 is fully folded, the positioning part 2334 on the side support 233 is engaged with the corresponding engaging part 217 on the frame 21, and the positioning part 2719 of the positioning part 271 is engaged with the corresponding blocking part 2339 of the side support 233. The second end of the fourth limiting part 272 on the positioning part 271 is engaged with the corresponding blocking part 2567 of the connector 256. Therefore, the limiting effect of the hinge device 22 in the fully folded state is enhanced, and the hinge device 22 maintains a stable folded state. This improves the protection of the flexible screen 30 by the hinge device 22 when the electronic device 100 is dropped. When the electronic device 100 is dropped, the side support 233 is less likely to shift relative to the fixed base 251, thereby preventing displacement between the side support 233 and the flexible screen 30 and damage to the flexible screen 30, and improving the overall strength of the electronic device 100.

[0099] In some embodiments, the first limiting portion 2540 on the rotating member 254 and the first limiting groove 2333 on the side support member 233 can be omitted, that is, the rotating member 254 and the side support member 233 are not directly connected. Since the side support member 233 and the connecting member 256 are connected by the first arc groove 2332 and the first arc rail 2562, the side support member 233 and the driven member 261 are connected by the arc-shaped second limiting groove 2335 and the second limiting portion 263, and the side support member 233 and the positioning member 271 are connected by the arc-shaped fourth limiting groove 2337 and the fourth limiting portion 272, the connection between the components in the rotating shaft device can be made more compact, thereby reducing the overall width of the rotating shaft device, reducing the internal space occupied by the housing 20, which is beneficial to the layout of other components such as the motherboard or battery, and reducing the processing of the first limiting portion 2540 and the first limiting groove 2333, thus reducing costs. Secondly, the motion constraints between the second limiting part 263 and the second limiting groove 2335, and between the fourth limiting part 272 and the fourth limiting groove 2337, enhance the motion constraints of the rotating shaft device, making the rotating shaft device stable during folding or flattening, improving the accuracy of the rotating shaft device during folding or flattening, and increasing the flexibility of the rotating shaft device during folding or flattening, making it convenient to bend or flatten the rotating shaft device. In addition, in the fully folded state, the positioning part 2719 of the positioning member 271 and the locking part 2339 of the corresponding side support member 233 are in a stop-fitting engagement, and the second end of the fourth limiting part 272 on the positioning member 271 is engaged with the stop part 2567 of the corresponding connecting member 256; therefore, the limiting effect of the rotating shaft device in the fully folded state is enhanced, the rotating shaft device maintains a stable folded state, and the overall strength of the rotating shaft device is improved.

[0100] In some embodiments, the fourth limiting portion 272 on the positioning member 271 and the fourth limiting groove 2337 on the side support member 233 can be omitted. Since the side support member 233 and the connecting member 256 are connected by the first arc groove 2332 and the first arc rail 2562, the side support member 233 and the rotating member 254 are connected by the arc-shaped first arc groove 2332 and the first limiting portion 2540, and the side support member 233 and the driven member 261 are connected by the arc-shaped second limiting groove 2335 and the second limiting portion 263, the connections between the components in the rotating shaft device can be made more compact, thereby reducing the overall width of the rotating shaft device, reducing the internal space occupied by the housing 20, which is beneficial for the layout of other components such as the motherboard or battery, and also reduces the processing of the fourth limiting portion 272 and the fourth limiting groove 2337, thus reducing costs. Secondly, the motion constraints between the first arc groove 2332 and the first limiting part 2540, and between the second limiting groove 2335 and the second limiting part 263, enhance the motion constraints of the rotating shaft device. This ensures the stability of the rotating shaft device during folding or flattening, improves its accuracy during folding or flattening, and increases its flexibility, facilitating bending or flattening. Furthermore, in the fully folded state, the positioning part 2719 of the positioning member 271 engages with the corresponding blocking part 2339 of the side support member 233. This enhances the limiting effect of the rotating shaft device in the fully folded state, maintaining a stable folded state and improving its overall strength.

[0101] The above are the embodiments of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the embodiments of the present invention, and these improvements and modifications are also considered to be within the protection scope of the present invention.

Claims

1. A rotating shaft device, characterized in that, The rotating shaft device includes: The support mechanism includes two side support members; A rotating assembly, comprising a fixed base and rotating mechanisms disposed on opposite sides of the fixed base, the rotating mechanisms comprising rotating members and connecting members, the opposite ends of the rotating members being rotatably connected to the fixed base and the connecting members, respectively; and The driven assembly includes a driven member, one end of which is rotatably connected to the fixed base, and the other end of which is away from the fixed base is connected to the connecting member and the side support member respectively. The rotating member is connected to the side support member, and the connecting member is rotatably connected to the side support member. When the two connecting members approach each other, the two rotating members rotate relative to the fixed base and the connecting member and approach each other. The rotating members are slidably and rotatably connected to the corresponding side support members. The two driven members rotate relative to the fixed base, and the end of the driven member away from the fixed base slides and rotates relative to the connecting member and the side support member, causing the two driven members to approach each other, so that the two side support members fold together. When the two connecting members move away from each other, the two rotating members rotate relative to the fixed base and the connecting member and move away from each other. The rotating members are slidably and rotatably connected to the corresponding side support members. The two driven members rotate relative to the fixed base, and the end of the driven member away from the fixed base slides and rotates relative to the connecting member and the side support member, causing the two driven members to move away from each other, so that the two side support members unfold together.

2. The rotating shaft device according to claim 1, characterized in that, The rotating member and the side support member are slidably and rotatably connected by the cooperation of the first limiting groove and the first limiting part. The first limiting groove is provided in one of the rotating member and the side support member, and the first limiting part is provided in the other of the rotating member and the side support member.

3. The rotating shaft device according to claim 2, characterized in that, The first limiting groove includes a first limiting segment and a second limiting segment at its opposite ends, wherein the first limiting segment is closer to the fixed base than the second limiting segment; when the side support member is in a flattened state relative to the fixed base, the first limiting portion is limited to the second limiting segment; when the side support member is in a fully bent state relative to the fixed base, the first limiting portion is limited to the first limiting segment.

4. The rotating shaft device according to claim 2, characterized in that, The side support member includes a side support plate, and a first protrusion is provided on the back of the side support plate. The first limiting groove is provided on the side of the first protrusion near the fixed seat. The first limiting groove is bent away from the side support plate. The first limiting part includes a first limiting shaft connected to the rotating member and passing through the first limiting groove.

5. The rotating shaft device according to claim 1, characterized in that, The driven member and the side support member are slidably and rotatably connected by a second limiting groove and a second limiting part, wherein the second limiting groove is provided in one of the driven member and the side support member, and the second limiting part is provided in the other of the driven member and the side support member; the driven member and the connecting member are slidably and rotatably connected by a third limiting groove and a third limiting part, wherein the third limiting groove is provided in one of the driven member and the connecting member, and the third limiting part is provided in the other of the driven member and the connecting member.

6. The rotating shaft device according to claim 5, characterized in that, The second limiting groove includes a third limiting segment and a fourth limiting segment at its opposite ends, the third limiting segment being closer to the fixed base than the fourth limiting segment; the third limiting groove includes a fifth limiting segment and a sixth limiting segment at its opposite ends, the fifth limiting segment being closer to the fixed base than the sixth limiting segment; when the side support member is in a flattened state relative to the fixed base, the second limiting portion is limited to the fourth limiting segment of the second limiting groove, and the third limiting portion is limited to the sixth limiting segment of the third limiting groove; when the side support member is in a fully bent state relative to the fixed base, the second limiting portion is limited to the third limiting segment of the second limiting groove, and the third limiting portion is limited to the fifth limiting segment of the third limiting groove.

7. The rotating shaft device according to claim 5, characterized in that, The side support includes a side support plate, the follower is located on the back of the side support plate, and the second limiting groove and the third limiting groove are both bent toward the side away from the side support plate.

8. The rotating shaft device according to claim 5, characterized in that, The side support member includes a side support plate, the back of which is provided with a second protrusion, a second limiting groove is provided on the second protrusion, a third limiting groove is provided on the connector, the second limiting part includes a second limiting shaft connected to the driven member and passing through the second limiting groove, and the third limiting part includes a third limiting shaft connected to the driven member and passing through the third limiting groove.

9. The rotating shaft device according to claim 8, characterized in that, The driven member has a clearance groove at one end away from the fixed base. The clearance groove is used to accommodate the second protrusion. The second limiting axis and the third limiting axis are coaxial.

10. The rotating shaft device according to claim 1, characterized in that, The rotating shaft device further includes a positioning mechanism, which includes a positioning element. The positioning element is rotatably connected to the fixed base and slidably connected to the connecting element. The end of the positioning element away from the fixed base is movably connected to the side support.

11. The rotating shaft device according to claim 10, characterized in that, The positioning member and the side support member are slidably and rotatably connected by the cooperation of the fourth limiting groove and the fourth limiting part. The fourth limiting groove is provided in one of the positioning member and the side support member, and the fourth limiting part is provided in the other of the positioning member and the side support member.

12. The rotating shaft device according to claim 11, characterized in that, The fourth limiting groove includes a seventh limiting segment and an eighth limiting segment at its opposite ends, wherein the seventh limiting segment is closer to the fixed base than the eighth limiting segment; when the side support member is in a flattened state relative to the fixed base, the fourth limiting segment is limited to the eighth limiting segment; when the side support member is in a fully bent state relative to the fixed base, the fourth limiting segment is limited to the seventh limiting segment.

13. The rotating shaft device according to claim 11, characterized in that, The side support member includes a side support plate, a third protrusion is provided on the back of the side support plate, a fourth limiting groove is provided on the third protrusion, the fourth limiting groove is bent away from the side support plate, and the fourth limiting part includes a fourth limiting shaft connected to the positioning member and passing through the fourth limiting groove.

14. The rotating shaft device according to claim 13, characterized in that, The positioning member has a clearance groove at one end away from the fixed seat, and the third protrusion is accommodated in the clearance groove.

15. The rotating shaft device according to claim 13, characterized in that, The connector is provided with a stop portion corresponding to the positioning member, and the fourth limiting groove of the third protrusion is provided with an abutment at one end near the fixed seat; when the side support member is in a fully bent state relative to the fixed seat, the first end of the fourth limiting shaft abuts against the abutment, so that the second end of the fourth limiting shaft is in a stop-fitting engagement with the stop portion.

16. The rotating shaft device according to claim 15, characterized in that, The positioning mechanism further includes an elastic element with a pre-elastic force, which is used to drive the second end of the fourth limiting shaft to disengage from the stop portion.

17. The rotating shaft device according to claim 16, characterized in that, The end of the abutment away from the fixed seat is provided with a guide surface. During the bending process of the side support relative to the fixed seat, the first end of the fourth limiting shaft slides against the guide surface, causing the second end of the fourth limiting shaft to move toward the stop part. The elastic member undergoes elastic deformation until the second end of the fourth limiting shaft is in stop engagement with the stop part.

18. The rotating shaft device according to claim 10, characterized in that, The positioning member includes a positioning part located on the side of the positioning member away from the fixed seat. The side support member includes a side support plate and a locking part located on the side of the side support plate away from the fixed seat. When the side support member is fully bent relative to the fixed seat, the positioning part and the locking part are engaged in a stop-positioning cooperation.

19. The rotating shaft device according to claim 10, characterized in that, The positioning member and the connecting member are connected by a guide groove and a guide rail. The guide groove extends along the rotation axis perpendicular to the axis between the positioning member and the fixed base. The guide groove is provided in one of the positioning member and the connecting member, and the guide rail is provided in the other of the positioning member and the connecting member.

20. A folding shell, characterized in that, The folding housing includes a pivot device as described in any one of claims 1-19 and two frames. The pivot device is located between the two frames, and the two frames are respectively connected to the connecting parts of the two rotating mechanisms of the pivot device. The two frames are folded or unfolded to each other through the pivot device.

21. The folding housing according to claim 20, characterized in that, The side support of the rotating shaft device has a positioning part on the side away from the fixed seat, and the frame has a locking part on the side close to the rotating shaft device; when the two frames are in a fully folded state, the positioning part of the side support and the locking part are engaged.

22. An electronic device, characterized in that, The electronic device includes a flexible screen and a folding housing as described in claim 20 or 21, wherein two side supports of the pivot device of the folding housing are supported on the back of the flexible screen. The flexible screen can be folded or flattened as the folding shell folds or unfolds with each other.

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