Three-bending rotating shaft structure of flexible screen

Abstract

The three-bending rotating shaft structure of the flexible screen comprises a first shell, the first shell and a middle shell are respectively connected with a first rotating shaft assembly, and the middle shell and a second shell are respectively connected with a second rotating shaft assembly, so that continuous folding is realized; the first rotating shaft assembly is provided with a base, and the two rotating shaft modules are connected with the two sides of the base respectively and rotate relatively to be opened and closed. Any rotating shaft module is provided with a shell connecting rod, the shell connecting rod is provided with a limiting space, and the shell connecting rod is provided with a guide rail and a sliding rail; a guide piece of an arc-shaped swing arm is connected with the arc-shaped part, and the middle section of the arc-shaped swing arm is pivoted and positioned in the limiting space; a supporting plate of a swing arm connecting rod is rotationally connected with the arc-shaped swing arm, and a first guide rod of the supporting plate is connected with the guide rail; a second guide rod of a gear connecting rod is connected with the sliding rail, and the other end of the gear connecting rod is connected with a synchronous moving assembly.

Description

Technical Field

[0001] The utility model relates to a hinge, in particular to a three-bending hinge structure of a flexible screen of a foldable electronic device. Background Art

[0002] In the existing "flexible screen folding device", different hinge structure designs are required depending on whether the flexible screen is folded inward or outward and the curvature of the curved part, so as to avoid hindering the folding action of the flexible screen and causing pulling. The folding device with a flexible screen folding inward mainly follows the traditional folding device in terms of opening and closing action. After folding, the flexible screen can be protected inside, and it is closer to user habits and easy to accept. However, in such products, the structural design of its hinge structure will be limited by the type of flexible screen used, and it must also be considered that the curved part of the flexible screen after folding inward will present a teardrop shape or a horseshoe shape, which will form a difference. Among them, for the hinge structure suitable for the teardrop shape, the components that need to be considered and the connection relationship and action between them are all key factors affecting whether the flexible screen is easy to be damaged and its service life.

[0003] Regarding teardrop-shaped hinge structures, as shown in patents CN110630625B, CN109469680B, CN109654113B, and CN209959699U, various structural designs have been explored in conjunction with flexible screens to achieve both thinness and overall aesthetics. However, given current manufacturing processes and cost considerations, achieving thinness through hinge structures that form a virtual rotation center when folded is particularly effective, such as the "single virtual rotation center" disclosed in the drawings of patents CN110630625B and CN209959699U. However, in order to make the movement of the entire mechanism closer to the teardrop shape after the flexible screen is folded inward to reduce damage, it has been further developed into a "double virtual rotation center" combined with a "single and double crank connecting rod mechanism" structure as disclosed in the patents CN209514482U, CN210518418U / CN210779707U, CN112395368B and TWM633678 respectively. However, its overall manufacturing and assembly are more complicated than the previous "teardrop-shaped shaft structure" and have higher specifications and quality requirements. This not only easily increases the defective rate, but also increases production costs.

[0004] Furthermore, the aforementioned patents all disclose foldable electronic devices in which two housings are folded toward each other. For flexible screens with a long horizontal width, when not in use and folded, the overall width cannot be effectively reduced, making it difficult to carry and store. Utility Model Content

[0005] In view of this, in order to provide a structure different from the prior art and to improve the above-mentioned shortcomings, the inventors have accumulated many years of experience and continued research and development and improvement, thus producing the present utility model.

[0006] One purpose of the present invention is to provide a three-bend hinge structure for a flexible screen, which can solve the problem that the hinge structure of the prior art is complex in overall structure and requires high specifications and quality requirements. The improvement of the overall appearance and the dispersion of the structure can simplify the components and processes, and achieve the effect of dual-axis simultaneous movement to produce a teardrop-shaped space, thereby improving the yield and effectively reducing the production cost. At the same time, it can solve the problem that the foldable electronic device of the prior art cannot effectively reduce the overall width of the flexible screen with a long horizontal width after it is not in use and folded. By arranging an intermediate shell between a first shell and a second shell, connecting a first hinge assembly between the first shell and the intermediate shell, and connecting a second hinge assembly between the intermediate shell and the second shell, the structure can be suitable for flexible screens with a long horizontal width, and when folded continuously, the overall width of the foldable electronic device can be effectively shortened to facilitate carrying and storage.

[0007] In order to achieve the purpose of the above-mentioned utility model, the three-bending axis structure of the flexible screen provided in the utility model mainly includes a first shell, an intermediate shell and a second shell. The first shell and the intermediate shell are respectively connected to the two ends of a first axis assembly, and the intermediate shell and the second shell are respectively connected to the two ends of a second axis assembly, so that the first shell, the intermediate shell and the second shell can be folded continuously; the first axis assembly includes a base and two opposite axis modules, and the base has two opposite arc-shaped parts; one end of the two axis modules is connected to a moving assembly through at least one shaft rod, and one end of the two axis modules is respectively connected to the two arc-shaped parts, so that the two axis modules can rotate relative to each other and open and close; the other ends of the two axis modules are respectively connected to a flexible screen for relative bending of the flexible screen; any axis module includes a shell connecting rod, an arc-shaped swing arm, a swing arm connecting rod and a gear connecting rod. One end of the shell connecting rod has a limited space, and the other end of the shell connecting rod has a guide rail and a slide rail; one end of the arc-shaped swing arm has a guide member, which is connected to the arc portion in a relative arc-shaped swinging manner, and the middle section of the arc-shaped swing arm is pivotally positioned in the limited space of the shell connecting rod; the swing arm connecting rod has a support plate, one end of the support plate is rotatably connected to the other end of the arc-shaped swing arm, and the other end of the support plate has a first guide rod, which is connected to the guide rail of the shell connecting rod in a relative sliding manner; and one end of the gear connecting rod has a second guide rod, which is connected to the slide rail of the shell connecting rod in a relative sliding manner, and the other end of the gear connecting rod is connected to the synchronous component.

[0008] During implementation, the base includes an elongated seat body and an elongated cover plate, the elongated seat body has a first arc concave surface on one side in the short direction, and a second arc concave surface on the other side in the short direction of the elongated seat body; the elongated cover plate has a first arc convex surface on one side in the short direction, and a first arc groove is provided between the first arc convex surface and the first arc concave surface, the elongated cover plate has a second arc convex surface on the other side in the short direction, and a second arc groove is provided between the second arc convex surface and the second arc concave surface, the two arc portions include a first arc groove and a second arc groove, and the two guide members are respectively arranged in the first arc groove and the second arc groove in a relative arc swinging manner.

[0009] During implementation, the shell connecting rod has a first vertical plate, a second vertical plate and a third vertical plate arranged at intervals, and a limiting space is provided between the first vertical plate and the second vertical plate for accommodating the middle position of the limiting arc swing arm and the other end of the arc swing arm; the second vertical plate and the third vertical plate have an oblique groove on the opposite side surfaces respectively, and the guide rail includes two oblique grooves; the third vertical plate has an extension portion, the extension portion has a sliding rail, the sliding rail has a long groove, the second guide rod passes through the long groove, and one end of the gear connecting rod and the other end of the shell connecting rod can slide relative to each other; the other end of the support plate has a protrusion, one end of the protrusion is sleeved with the first guide rod, and the two ends of the first guide rod are respectively limited in the two oblique grooves, so that the first guide rod can be connected to the guide rail of the shell connecting rod in a relative sliding manner.

[0010] During implementation, the middle section of the arc-shaped swing arm is pivotally positioned in the limited space of the shell connecting rod by a first straight rod; one end of the support plate has a cantilever, and one end of the cantilever is rotatably connected to the other end of the arc-shaped swing arm by a second straight rod; the other end of the gear connecting rod has a tooth portion, and the synchronous component includes two intermediate gears that are meshed with each other, and the tooth portion is meshedly connected to one of the intermediate gears.

[0011] During implementation, one side of the long direction of the base has a first arc-shaped rail, and the first rotating shaft assembly also includes a first shell connecting member, the first shell connecting member is combined with one end of the shell connecting rod, and one end of the first shell connecting member has a first guide member, and the first guide member is connected to the first arc-shaped rail in an arc-shaped sliding manner.

[0012] During implementation, the first shell connecting member is a long plate, and includes a connecting portion and a protruding portion. The connecting portion is combined with one end of the shell connecting rod, and one end of the protruding portion has a first guide member.

[0013] During implementation, the utility model also includes a damping module, the damping module includes a first positioning plate, at least one elastic member, a second positioning plate, a third positioning plate, a first concave cam and a second concave cam; at least one shaft rod includes a first shaft rod and a second shaft rod, one end of the first shaft rod and one end of the second shaft rod are respectively connected to an axle seat, the other end of the first shaft rod and the other end of the second shaft rod respectively pass through the first positioning plate, the at least one elastic member and the second positioning plate, and are respectively locked with the other end of the first shaft rod and the other end of the second shaft rod by a first end seal and a second end seal. One side surface of the first positioning plate has a first concave-convex portion and a second concave-convex portion, the first concave-convex portion connects to one side surface of the first concave cam, the other side surface of the first concave cam presses the third positioning plate, the second concave-convex portion connects to one side surface of the second concave cam, and the other side surface of the second concave cam presses the third positioning plate; the other end of the first shaft rod and the other end of the second shaft rod respectively pass through the third positioning plate, the first concave cam and the second concave cam, and then pass through the first concave-convex portion and the second concave-convex portion of the first positioning plate respectively.

[0014] During implementation, one side of the intermediate shell has at least one first guide groove, and one side of the second shell has at least one second guide groove; the second rotating shaft assembly includes an elongated base, a first arc-shaped rotating arm, a second arc-shaped rotating arm, a first co-moving connecting rod and a second co-moving connecting rod, one side of the short direction of the elongated base has a first limiting portion, and the other side of the short direction of the elongated base has a second limiting portion; one end of the first arc-shaped rotating arm is connected to one side of the intermediate shell, and the other end of the first arc-shaped rotating arm has a first guide portion, and the first guide portion is connected to the first limiting portion in a relative arc-shaped swinging manner; one end of the second arc-shaped rotating arm is connected to one side of the second shell, and the other end of the second arc-shaped rotating arm has a second guide portion, and the second guide portion The second limiting portion is connected in a relative arc swinging manner; one end of the first co-moving connecting rod has at least one first guide post, and the at least one first guide post is connected to the at least one first guide groove in a relatively movable manner, and the other end of the first co-moving connecting rod is connected to a first shaft member in a synchronous manner, the first shaft member has a first gear, and the first gear is toothed in a gear synchronous assembly; one end of the second co-moving connecting rod has at least one second guide post, and the at least one second guide post is connected to the at least one second guide groove in a relatively movable manner, and the other end of the second co-moving connecting rod is connected to a second shaft member in a synchronous manner, the second shaft member has a second gear, and the second gear is toothed in a gear synchronous assembly, so that the first co-moving connecting rod and the second co-moving connecting rod can rotate in opposite directions relative to each other to open and close.

[0015] During implementation, the gear synchronization assembly includes a third gear, an intermediate gear set and a fourth gear that mesh with each other in sequence. The third gear is connected to the first gear, and the fourth gear is connected to the second gear, so that the first and second synchronization connecting rods can rotate in opposite directions to open and close.

[0016] During implementation, the first shell and the middle shell are folded relative to each other, the second shell covers the first shell, and the flexible screen forms a G-shaped three-fold shape.

[0017] The beneficial effects of the utility model are:

[0018] The first rotating shaft assembly not only allows the two curved swing arms to be rotatably connected via the two swing arm links, the two first guide rods on the two swing arm links to slide relative to the two guide rails on the two housing links, and the two second guide rods on the two gear links to slide relative to the two slide rails on the two housing links, thereby achieving the effect of dual-axis simultaneous movement and thus creating a teardrop-shaped space; but also simplifies components and enhances assembly convenience through the improvement of the overall appearance and decentralized structure, thereby reducing manufacturing and assembly costs. Simultaneously, the first and second guide posts of the first and second housing connectors can slide in an arc and be constrained within the first and second arcuate rails of the elongated seat, respectively, allowing the two support plates to form a stable and smooth flipping opening and closing action within the limited structural space. At the same time, an intermediate housing is arranged between the first housing and the second housing, and a first hinge assembly is connected between the first housing and the intermediate housing, and a second hinge assembly is connected between the intermediate housing and the second housing. After the first housing and the intermediate housing are folded relative to each other, the second housing can be folded and the second housing can cover the first housing to form a G-shaped three-folded shape, thereby shortening the overall width of the foldable electronic device for easier carrying and storage.

[0019] To further understand the present invention, preferred embodiments are given below, along with drawings and figure numbers, to describe in detail the specific components of the present invention and the effects achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the three-dimensional appearance of the three-bending shaft structure of the flexible screen of the present invention.

[0021] Figure 2 This is a partial exploded view of the first rotating shaft assembly of the present invention.

[0022] Figure 3 This is an exploded view of the first rotating shaft assembly of the present invention.

[0023] Figure 4 This is a top view of a preferred embodiment of the first rotating shaft assembly of the present invention when flattened.

[0024] Figure 5 for Figure 4 A-A' cross-sectional view.

[0025] Figure 6 for Figure 4 BB' cross-section diagram.

[0026] Figure 7 for Figure 4 C-C' cross-section diagram.

[0027] Figure 8 This is a cross-sectional view of the first rotating shaft assembly of the present invention after bending along the line A-A'.

[0028] Figure 9 This is a BB' cross-sectional view of the first rotating shaft assembly of the present invention after bending.

[0029] Figure 10 This is a schematic diagram of the three-dimensional appearance of the first rotating shaft assembly of the present invention after being bent.

[0030] Figure 11 This is a partial exploded view of the second rotating shaft assembly of the present invention.

[0031] Figure 12 This is a partial exploded view of the second rotating shaft assembly of the present invention.

[0032] Figure 13 This is a top view of the second rotating shaft assembly of the present invention when flattened.

[0033] Figure 14 for Figure 13 D-D' cross-section diagram.

[0034] Figure 15 for Figure 13 E-E' cross-section diagram.

[0035] Figure 16 This is a DD' cross-sectional view of the second rotating shaft assembly of the present invention after bending.

[0036] Figure 17 This is a schematic diagram of the three-dimensional appearance of the second rotating shaft assembly of the present invention after being bent.

[0037] Figure 18 It is a schematic three-dimensional appearance diagram of the first rotating shaft assembly and the second rotating shaft assembly of the present invention after continuous bending.

[0038] Description of Reference Numerals

[0039] 1: Flexible screen three-bending axis structure;

[0040] 11: first shell;

[0041] 12: intermediate housing;

[0042] 121: first housing connecting rod;

[0043] 122, 122': first guide groove;

[0044] 13: second housing;

[0045] 131: second housing connecting rod;

[0046] 132, 132': second guide groove;

[0047] 14: first rotating shaft assembly;

[0048] 15: second rotating shaft assembly;

[0049] 2: base;

[0050] 21: elongated seat body;

[0051] 211: first arc concave surface;

[0052] 212: Second arc concave surface;

[0053] 213: limiting plate;

[0054] 214: first curved rail;

[0055] 215: second curved rail;

[0056] 22: long cover plate;

[0057] 221: first arc convex surface;

[0058] 222: second arc convex surface;

[0059] 23: elongated bottom shell;

[0060] 231: positioning groove;

[0061] 232: first limiting groove;

[0062] 233: Accommodation space;

[0063] 234: second limiting slot;

[0064] 24, 24': arcuate portion;

[0065] 241: first arc-shaped groove;

[0066] 242: second arc-shaped groove;

[0067] 25,25': gap;

[0068] 3,3': shaft module;

[0069] 31,31': housing connecting rod;

[0070] 311: first vertical board;

[0071] 312: second vertical plate;

[0072] 313: The third vertical board;

[0073] 314: limited space;

[0074] 3141: First Space;

[0075] 3142: Second space;

[0076] 315: First straight shot;

[0077] 316: oblique groove;

[0078] 317,317': guide rail;

[0079] 318: extension;

[0080] 319,319': slide rail;

[0081] 3191: long groove;

[0082] 32,32': arc-shaped swing arm;

[0083] 321: guide member;

[0084] 322,322': platform;

[0085] 323: first shaft hole;

[0086] 324: second shaft hole;

[0087] 33,33': swing arm connecting rod;

[0088] 331, 331': support plate;

[0089] 332: First longboard;

[0090] 333: The second long board;

[0091] 334: cantilever;

[0092] 335, 335': first lug;

[0093] 336, 336': third axis hole;

[0094] 337: Second straight shot;

[0095] 338: protruding piece;

[0096] 339,339': first guide rod;

[0097] 34,34': gear connecting rod;

[0098] 341, 341': second lug;

[0099] 342, 342': fourth axis hole;

[0100] 343, 343': second guide rod;

[0101] 344,344': tooth;

[0102] 4: Same moving component;

[0103] 41,42: intermediate gear;

[0104] 43: first shaft;

[0105] 44: second shaft;

[0106] 5: Damping module;

[0107] 51: third positioning plate;

[0108] 52: first concave cam;

[0109] 53: second concave cam;

[0110] 54: first positioning plate;

[0111] 541: first concave-convex portion;

[0112] 542: second concave-convex portion;

[0113] 55: elastic member;

[0114] 56: second positioning plate;

[0115] 561: Extended convex plate;

[0116] 57: first end seal;

[0117] 58: second end seal;

[0118] 59: axle seat;

[0119] 6: first housing connector;

[0120] 6': second shell connection;

[0121] 61: connecting portion;

[0122] 62, 62': protrusion;

[0123] 63: first guide;

[0124] 63': second guide;

[0125] 70: long base;

[0126] 701: upper cover;

[0127] 702: elongated body;

[0128] 703: first limiting portion;

[0129] 704: first arc groove;

[0130] 705: second limiting portion;

[0131] 706: second arc groove;

[0132] 71: first arc-shaped rotating arm;

[0133] 711: first plate;

[0134] 712: first guide portion;

[0135] 713: first bump;

[0136] 72: second arc-shaped rotating arm;

[0137] 721: second plate;

[0138] 722: second guide portion;

[0139] 723: second bump;

[0140] 73: first co-moving connecting rod;

[0141] 731,731': first guide post;

[0142] 732: first shaft member;

[0143] 733: first gear;

[0144] 74: second co-acting connecting rod;

[0145] 741,741': second guide post;

[0146] 742: second shaft member;

[0147] 743: second gear;

[0148] 75: Gear moving assembly;

[0149] 751: third gear;

[0150] 752: intermediate gear tooth group;

[0151] 753: fourth gear;

[0152] 8: First longboard;

[0153] 81: Second long board;

[0154] 811: first concave-convex member;

[0155] 812: second concave-convex member;

[0156] 82: The third long board;

[0157] 821: first concave-convex ring;

[0158] 822: second concave-convex ring;

[0159] 823: first elastic member;

[0160] 824: second elastic member;

[0161] 825: third elastic member;

[0162] 826: fourth elastic member;

[0163] 827: First shot;

[0164] 828: Second shot;

[0165] 83: The fourth long board;

[0166] 84: first nut;

[0167] 85: second nut;

[0168] 9: Flexible screen. DETAILED DESCRIPTION

[0169] See also Figure 1 As shown, it is a preferred embodiment of the three-bending hinge structure 1 of the flexible screen of the present invention, including a first shell 11, an intermediate shell 12 and a second shell 13, wherein the first shell 11 and the intermediate shell 12 are respectively connected to the two ends of a first hinge assembly 14, and the intermediate shell 12 and the second shell 13 are respectively connected to the two ends of a second hinge assembly 15, so that the first shell 11, the intermediate shell 12 and the second shell 13 are continuously folded; that is, after the first shell 11 and the intermediate shell 12 are relatively folded, the second shell 13 is folded again, and the second shell 13 covers the first shell 11.

[0170] like Figures 2 to 7As shown, the first rotating shaft assembly 14 includes a base 2, two rotating shaft modules 3, 3', a co-acting assembly 4, a damping module 5, a first shell connecting member 6 and a second shell connecting member 6'. The base 2 includes an elongated base body 21, an elongated cover plate 22 and an elongated bottom shell 23. One side of the elongated base body 21 in the short direction has a first arc concave surface 211, and the other side of the elongated base body 21 in the short direction has a second arc concave surface 212. One side of the elongated base body 21 in the long direction has a limit plate 213, and the limit plate 213 has a first arc rail 214 and a second arc rail 215. The first arc rail 214 and the second arc rail 215 are symmetrically arranged on the two sides of the elongated base body 21 in the short direction; the elongated cover plate 22 corresponds to It is locked to the top of the elongated base 21 and forms two oppositely shaped arcuate portions 24, 24'. One short-side portion of the elongated cover 22 has a first arcuate convex surface 221, with a first arcuate groove 241 defined between the first arcuate convex surface 221 and the first arcuate concave surface 211. The other short-side portion of the elongated cover 22 has a second arcuate convex surface 222, with a second arcuate groove 242 defined between the second arcuate convex surface 222 and the second arcuate concave surface 212. The two arcuate portions 24, 24' include a first arcuate groove 241 and a second arcuate groove 242, respectively. Two rectangular notches 25, 25' are defined between the first arcuate convex surface 221 and the second arcuate convex surface 222. The top of the elongated bottom shell 23 has a positioning groove 231 to accommodate and secure the elongated base 21.

[0171] The two hinge modules 3, 3' have the same shape and structure and are arranged on opposite, parallel sides of the base 2 in the short direction. One end of each hinge module 3, 3' is connected to the synchronous assembly 4 via a first shaft 43 and a second shaft 44, respectively. These ends of each hinge module 3, 3' are rotatably connected to the two arc-shaped portions 24, 24', thereby driving the two parts of a flexible screen 9 to flip open and close relative to each other. Taking one of the two hinge modules 3, 3' as an example, it mainly includes a housing connecting rod 31, a curved swing arm 32, a swing arm connecting rod 33, and a gear connecting rod 34.

[0172] The housing connecting rod 31 is a rectangular plate, the bottom surface of which is locked to the first housing 11. The housing connecting rod 31 comprises a first vertical plate 311, a second vertical plate 312, and a third vertical plate 313, arranged in a spaced relationship. A limiting space 314 is defined between the first and second vertical plates 311, 312. The limiting space 314 comprises a first space 3141 and a second space 3142, which are interconnected. A first straight rod 315 is positioned within the first space 3141, with its ends positioned on opposing sides of the first and second vertical plates 311, 312, respectively. Opposing sides of the second and third vertical plates 312, respectively, have an oblique groove 316 formed thereon. The two oblique grooves 316 are combined to form a guide rail 317. The bottom of the third vertical plate 313 has a flat plate extending outward, which serves as an extension portion 318 . A rectangular slide rail 319 is provided above the extension portion 318 , and a long slot 3191 is provided along the longitudinal direction of the slide rail 319 .

[0173] The arc-shaped swing arm 32 is an elongated rod. One end of the arc-shaped swing arm 32 has an arc-shaped guide member 321, and one end of the guide member 321 has a platform 322. The arc-shaped guide member 321 is constrained in the first arc groove 241 or the second arc groove 242 of the two arc-shaped portions 24, 24', so that the arc-shaped swing arm 32 swings in an arc relative to the base 2; the middle section of the arc-shaped swing arm 32 has a first axial hole 323, and the first straight rod 315 passes through the first axial hole 323, so that the middle section of the arc-shaped swing arm 32 is pivotally positioned in the first space 3141 of the shell connecting rod 31; the other end of the arc-shaped swing arm 32 has a second axial hole 324.

[0174] The swing arm link 33 includes a support plate 331, which supports one of the two parts of the flexible screen 9. The support plate 331 includes a first elongated plate 332 and a second elongated plate 333. One end of the first elongated plate 332 is locked to the other end of the second elongated plate 333, thereby forming a continuously extending elongated flat plate. A cantilever 334 is provided at one end of the first elongated plate 332. Two first lugs 335, 335' are spaced apart and parallel to each other at one end of the cantilever 334. The two first lugs 335, 335' have two coaxial third axial holes 336, 336' formed on the two first lugs 335, 335'. ​​After a lead straight rod passes through the two third axial holes 336, 336' and the second axial hole 324, one end of the support plate 331 is rotatably connected to the other end of the curved swing arm 32. The other end of the curved swing arm 32 can be movably confined within the second space 3142 of the housing link 31. During implementation, the lead straight rod serves as the second straight rod 337. In addition, a protrusion 338 is provided on the bottom surface of the other end of the first long plate 332, and a first guide rod 339 is sleeved on one end of the protrusion 338, and the two ends of the first guide rod 339 are respectively limited in the two oblique grooves 316, so that the first guide rod 339 is connected to the guide rail 317 of the shell connecting rod 31 in a relatively sliding manner.

[0175] The gear connecting rod 34 is an arc-shaped plate. Two spaced, parallel second lugs 341, 341' are provided at one end of the gear connecting rod 34. These second lugs 341, 341' define two coaxial fourth axial holes 342, 342'. A leading straight rod passes through the fourth axial holes 342, 342' and the slot 3191, then slides relative to the slide rail 319 at the other end of the housing connecting rod 31. During operation, the leading straight rod serves as a second guide rod 343. The other end of the gear connecting rod 34 has a toothed portion 344. The synchronous assembly 4 includes two meshing intermediate gears 41 and 42. The two teeth 344 and 344' of the two gear connecting rods 34 and 34' of the two rotating shaft modules 3 and 3' respectively mesh with the two intermediate gears 41 and 42. The two teeth 344 and 344' pass through the first shaft 43 and the second shaft 44, respectively, so that the two gear connecting rods 34 and 34' rotate synchronously with the first shaft 43 and the second shaft 44, respectively, and the two gear connecting rods 34 and 34' rotate in opposite directions to open and close.

[0176] The damping module 5 primarily comprises a third positioning plate 51, a first concave cam 52, a second concave cam 53, a first positioning plate 54, at least one elastic member 55, and a second positioning plate 56. The third positioning plate 51, the first positioning plate 54, and the second positioning plate 56 are sequentially spaced and arranged side by side. One side of the first positioning plate 54 has a first concave-convex portion 541 and a second concave-convex portion 542. The first concave-convex portion 541 abuts against one side of the first concave cam 52, and the second concave-convex portion 542 abuts against one side of the second concave cam 53. The other side of the first concave cam 52 and the other side of the second concave cam 53 respectively press against one side of the third positioning plate 51. In this embodiment, the at least one elastic member 55 comprises four compression springs, the two ends of which press against the other side of the first positioning plate 54 and one side of the second positioning plate 56, respectively. The second positioning plate 56 is an elongated plate. A side surface of the second positioning plate 56 has an extended protruding plate 561 . The extended protruding plate 561 is locked downwardly with the elongated base 21 .

[0177] One end of the parallel first shaft 43 and the second shaft 44 are respectively connected and positioned on a shaft seat 59, and the other end of the first shaft 43 and the other end of the second shaft 44 are respectively connected to the two teeth 344, 344', and then pass through the third positioning plate 51, the first concave cam 52, the second concave cam 53, the first positioning plate 54, the two elastic members 55 and the second positioning plate 56, and are respectively clamped with a first end seal 57 and a second end seal 58, so as to simultaneously fix and compress the four elastic members 55, so that the first shell 11 and the intermediate shell 12 can rotate stably during the flipping process and freely stop at a certain angle when rotating.

[0178] The first shell connecting member 6 and the second shell connecting member 6' are respectively an elongated plate. The first shell connecting member 6 and the second shell connecting member 6' have the same appearance and structure and are arranged in opposite directions on both sides of the short direction of the base 2. Taking the first shell connecting member 6 as an example, it mainly includes a connecting portion 61 and a protruding portion 62, wherein the connecting portion 61 is locked to the side surface of one end of the shell connecting rod 31, and the protruding portion 62 is a long strip extending outward and bending downward from one end of the connecting portion 61. One end of the protruding portion 62 has a laterally protruding cylinder, which serves as a first guide 63. The first guide 63 is connected to the first arc rail 214 of the elongated seat body 21 in an arc-shaped sliding manner, and the second guide 63' of the second shell connecting member 6' is connected to the second arc rail 215 of the elongated seat body 21 in an arc-shaped sliding manner.

[0179] By this, Figures 3 to 10 As shown, during the process of the first shell 11 and the intermediate shell 12 being fully unfolded or relatively folded and closed, for example: during the conversion from the folded and closed state to the unfolded state, when the two gear connecting rods 34, 34' of the two rotating shaft modules 3, 3' rotate relative to each other, the two arc-shaped swing arms 32, 32' rotate relative to each other, and the two shell connecting rods 31, 31' are pushed by the two arc-shaped swing arms 32, 32' respectively, so that the two first guide rods 339, 339' on the two swing arm connecting rods 33, 33' respectively slide relative to the two guide rails 317, 317', and the two second guide rods 343, 343' on the two gear connecting rods 34, 34' respectively slide relative to the two slide rails 319, 319', thereby respectively changing the angles of the two support plates 331, 331'. When the first shell 11 and the intermediate shell 12 are fully unfolded, the protrusion 62 of the first shell connector 6 is confined in the first limiting groove 232 and the accommodating space 233 of the elongated bottom shell 23, and the other protrusion 62' of the second shell connector 6' is confined in the second limiting groove 234 and the accommodating space 233.

[0180] The two support plates 331, 331' are flush with the short sides of the elongated cover plate 22, and the two platforms 322, 322' of the two curved swing arms 32, 32' respectively fill the two rectangular notches 25, 25' of the elongated cover plate 22. This allows the two support plates 331, 331' to be coplanar with the elongated cover plate 22, providing full-plane support for the flexible screen 9. Furthermore, when the first housing 11 and the intermediate housing 12 are folded and closed relative to each other, the relative angle of the two support plates 331, 331' can be changed by the relative rotation of the two housing connecting rods 31, 31', thereby creating sufficient space to accommodate the curved portion of the flexible screen 9.

[0181] Figures 11 to 17This is a preferred embodiment of the second rotating shaft assembly 15, wherein the intermediate housing 12 has a first housing connecting rod 121, one side of which has two first guide grooves 122, 122', and the second housing 13 has a second housing connecting rod 131, one side of which has two second guide grooves 132, 132'. The second rotating shaft assembly 15 includes an elongated base 70, a first arc-shaped rotating arm 71, a second arc-shaped rotating arm 72, a first synchronous connecting rod 73, a second synchronous connecting rod 74 and a gear synchronous assembly 75. The elongated base 70 includes an upper cover 701 and an elongated body 702. The upper cover 701 is locked and fixed to the top surface of the elongated body 702. One side of the elongated body 702 in the short direction has an arc-shaped groove, which serves as a first limiting portion 703. The bottom of the first limiting portion 703 has a first arc-shaped groove 704; the other side of the elongated body 702 in the short direction has another arc-shaped groove, which serves as a second limiting portion 705. The bottom of the second limiting portion 705 has a second arc-shaped groove 706.

[0182] One end of the first curved arm 71 has a first flat plate 711, which is locked into a first groove 123 on one side of the elongated body 702. The other end of the first curved arm 71 has an arcuate block, which serves as a first guide portion 712. One end of the first guide portion 712 has a first protrusion 713. The first guide portion 712 is received and restrained within the first limiting portion 703 of the elongated body 702, allowing the first guide portion 712 and the first limiting portion 703 to swing relative to each other in an arc. The first protrusion 713 extends into the first arc groove 704, where it presses against a side wall of the first arc groove 704, preventing the first curved arm 71 from excessive rotation.

[0183] One end of the second curved arm 72 has a second flat plate 721, which locks into a second groove 1231 on the other side of the elongated body 702. The other end of the second curved arm 72 has another curved block, which serves as a second guide portion 722. One end of the second guide portion 722 has a second protrusion 723. The second guide portion 722 is received and restrained within the second limiting portion 705 of the elongated body 702, allowing the second guide portion 722 and the second limiting portion 705 to swing relative to each other in an arc shape. The second protrusion 723 extends into the second arc groove 706, where it presses against a sidewall of the second arc groove 706, allowing the second curved arm 72 to flatten with the first curved arm 71 and prevent excessive rotation.

[0184] One end of the first co-moving link 73 has two first guide posts 731, 731', which are accommodated and confined in the two first guide grooves 122, 122' of the first housing link 121, so that the two first guide posts 731, 731' and the two first guide grooves 122, 122' can move linearly relative to each other. The other end of the first co-moving link 73 is connected to a first shaft member 732 in a co-moving manner, and the first shaft member 732 has a first gear 733. One end of the second co-moving link 74 has two second guide posts 741, 741', which are accommodated and confined in the two second guide grooves 132, 132' of the second housing link 131, so that the two second guide posts 741, 741' and the two second guide grooves 132, 132' can move linearly relative to each other; the other end of the second co-moving link 74 is connected to a second shaft member 742 in a co-moving manner, and the second shaft member 742 has a second gear 743.

[0185] The gear synchronization assembly 75 includes a third gear 751, an intermediate gear set 752, and a fourth gear 753, which mesh with each other in sequence. The third gear 751 is engaged with the first gear 733, the intermediate gear set 752 includes four gears, and the fourth gear 753 is engaged with the second gear 743. This allows the first and second synchronization links 73 and 74 to rotate in opposite directions, driving the first and second arc-shaped rotating arms 71 and 72 to rotate relative to each other and open and close. Simultaneously, after the intermediate housing 12 and the second housing 13 rotate in opposite directions to close, the distance between the intermediate housing 12 and the second housing 13 is widened, thereby sandwiching the first housing 11 therebetween.

[0186] In addition, the common end of the first synchronous link 73 and the second synchronous link 74 has a first long plate 8, a second long plate 81, a third long plate 82 and a fourth long plate 83 arranged in sequence, and a first gear 733, a gear synchronous assembly 75 and a second gear 743 are provided between the first long plate 8 and the second long plate 81. A first concave-convex part 811 and a second concave-convex part 812 are arranged in parallel on one side of the second long plate 81; a first concave-convex ring 821 and a second concave-convex ring 822 are arranged in parallel on one side of the third long plate 82, wherein the first concave-convex ring 821 is connected to the first concave-convex ring 811. Part 811, the second concave-convex ring 822 is connected to the second concave-convex part 812, and a first elastic part 823, a second elastic part 824, a third elastic part 825 and a fourth elastic part 826 are arranged in parallel between the other side surface of the third long plate 82 and the fourth long plate 83; the second elastic part 824 passes through a first rod 827, and the third elastic part 825 passes through a second rod 828, so as to position the second elastic part 824 and the third elastic part 825, and make the two ends of the second elastic part 824 and the two ends of the third elastic part 825 press against the third long plate 82 and the fourth long plate 83 respectively.

[0187] One end of the first shaft member 732 is connected to the other end of the first synchronous connecting rod 73 in a synchronous manner. The other end of the first shaft member 732 passes through the first long plate 8, the first gear 733, the second long plate 81, the first concave-convex member 811, the first concave-convex ring 821, the third long plate 82, the first elastic member 823 and the fourth long plate 83 in sequence, and is locked with a first nut 84; and one end of the second shaft member 742 is connected to the other end of the second synchronous connecting rod 74 in a synchronous manner. The other end of the second shaft member 742 passes through the first long plate 8, the second gear 743, the second long plate 81, the second concave-convex member 812, the second concave-convex ring 822, the third long plate 82, the fourth elastic member 826 and the fourth long plate 83 in sequence, and is locked with a second nut 85.

[0188] In this way, the relatively bent intermediate shell 12 and the second shell 13 can be stably rotated during the process of being turned over to be closed or fully extended, and can stop freely and automatically lock at a certain preset angle during the rotation. Figure 18 As shown, after the first shell 11 and the middle shell 12 are folded relative to each other, the second shell 13 is folded and the second shell 13 covers the first shell 11, so that the flexible screen 9 can form a G-shaped three-fold shape.

[0189] In summary, based on the above disclosure, the first rotating shaft assembly of the present invention can achieve the effect of dual-axis simultaneous movement and thus produce a teardrop-shaped space by rotating and connecting the two curved swing arms through the two swing arm connecting rods, the two first guide rods on the two swing arm connecting rods sliding relative to the two guide rails on the two housing connecting rods, and the two second guide rods on the two gear connecting rods sliding relative to the two slide rails on the two housing connecting rods. Furthermore, the overall appearance can be improved and the structure decentralized to simplify the components and enhance the convenience of assembly, thereby reducing manufacturing and assembly costs. At the same time, the first and second guide posts of the first and second housing connecting members can slide in an arc shape and be constrained within the first and second arc rails of the elongated seat body, respectively, so that the two support plates can form a stable and smooth flipping opening and closing action within the limited structural space. At the same time, an intermediate housing is arranged between the first housing and the second housing, and a first hinge assembly is connected between the first housing and the intermediate housing, and a second hinge assembly is connected between the intermediate housing and the second housing. After the first housing and the intermediate housing are folded relative to each other, the second housing can be folded and the second housing can cover the first housing to form a G-shaped three-folded shape, thereby shortening the overall width of the foldable electronic device for easier carrying and storage.

[0190] Although the present invention discloses preferred specific embodiments to achieve the above-mentioned objectives, it is not intended to limit the structural features of the present invention. Any technician in this technical field, under the technical spirit of the present invention, can easily think of any changes or modifications, and they are all covered by the scope of the patent application of the present invention.

Claims

1. A flexible screen three-bending axis structure, characterized in that: The foldable ... The first hinge assembly includes a base and two hinge modules in opposite directions, the base having two arc-shaped portions in opposite directions; one end of the two hinge modules is connected to a moving assembly via at least one shaft, and the one end of the two hinge modules is respectively connected to the two arc-shaped portions, allowing the two hinge modules to rotate and open relative to each other; the other end of the two hinge modules is respectively connected to a flexible screen, allowing the flexible screen to be bent relative to each other; Any of the shaft modules includes: A housing connecting rod, one end of which has a limiting space, and the other end of which has a guide rail and a slide rail; An arc-shaped swing arm, one end of which has a guide member, the guide member is connected to the arc portion in a relatively arc-shaped swinging manner, and the middle section of the arc-shaped swing arm is pivotally positioned in the limited space of the housing connecting rod; a swing arm connecting rod having a support plate, one end of which is rotatably connected to the other end of the arc-shaped swing arm, and the other end of which has a first guide rod, which is connected to the guide rail of the housing connecting rod in a relatively sliding manner; and A gear connecting rod has a second guide rod at one end, the second guide rod is connected to the slide rail of the housing connecting rod in a relatively sliding manner, and the other end of the gear connecting rod is connected to the synchronous assembly.

2. The flexible screen three-bend hinge structure according to claim 1, characterized in that: The base includes an elongated seat body and an elongated cover plate, wherein one side of the elongated seat body in the short direction has a first arc concave surface, and the other side of the elongated seat body in the short direction has a second arc concave surface; one side of the elongated cover plate in the short direction has a first arc convex surface, and a first arc groove is provided between the first arc convex surface and the first arc concave surface, and the other side of the elongated cover plate in the short direction has a second arc convex surface, and a second arc groove is provided between the second arc convex surface and the second arc concave surface, the two arc portions include the first arc groove and the second arc groove, and the two guide members are respectively arranged in the first arc groove and the second arc groove in a relative arc swinging manner.

3. The flexible screen three-bend hinge structure according to claim 1, characterized in that: The cam is secured to the chassis and has two opposite ends, one of which is a first end and a second end, and the other is secured to the chassis by a spring, and a second end is secured to the chassis by a spring.

4. The flexible screen three-bend hinge structure according to claim 1, characterized in that: The middle section of the arc-shaped swing arm is pivotally positioned in the limited space of the shell connecting rod by a first straight rod; one end of the support plate has a cantilever, and one end of the cantilever is rotatably connected to the other end of the arc-shaped swing arm by a second straight rod; the other end of the gear connecting rod has a tooth portion, and the synchronous assembly includes two intermediate gears that are meshed with each other, and the tooth portion is meshedly connected to one of the intermediate gears.

5. The flexible screen three-bending axis structure according to claim 1, characterized in that: One side of the long direction of the base has a first arc-shaped rail, and the first rotating shaft assembly also includes a first shell connecting member, which is combined with the one end of the shell connecting rod, and one end of the first shell connecting member has a first guide member, which is connected to the first arc-shaped rail in an arc-shaped sliding manner.

6. The flexible screen three-bend axis structure according to claim 5, characterized in that: The first shell connecting piece is a long plate and includes a connecting portion and a protruding portion. The connecting portion is combined with the one end of the shell connecting rod, and one end of the protruding portion has the first guide piece.

7. The flexible screen three-bend hinge structure according to claim 1, characterized in that: The invention also includes a damping module, which includes a first positioning plate, at least one elastic member, a second positioning plate, a third positioning plate, a first concave cam and a second concave cam; the at least one shaft includes a first shaft and a second shaft, one end of the first shaft and one end of the second shaft are respectively connected to a shaft seat, the other end of the first shaft and the other end of the second shaft pass through the first positioning plate, the at least one elastic member and the second positioning plate, and are locked with the other end of the first shaft and the second shaft by a first end seal and a second end seal respectively. At the other end, a first concave-convex portion and a second concave-convex portion are provided on one side surface of the first positioning plate, the first concave-convex portion connects to one side surface of the first concave cam, and the other side surface of the first concave cam presses the third positioning plate, the second concave-convex portion connects to one side surface of the second concave cam, and the other side surface of the second concave cam presses the third positioning plate; the other end of the first shaft rod and the other end of the second shaft rod respectively pass through the third positioning plate, the first concave cam and the second concave cam, and then respectively pass through the first concave-convex portion and the second concave-convex portion of the first positioning plate.

8. The flexible screen three-bend hinge structure according to claim 1, characterized in that: One side of the intermediate shell has at least one first guide groove, and one side of the second shell has at least one second guide groove; the second rotating shaft assembly includes an elongated base, a first arc-shaped rotating arm, a second arc-shaped rotating arm, a first co-moving connecting rod and a second co-moving connecting rod, one side of the short direction of the elongated base has a first limiting portion, and the other side of the short direction of the elongated base has a second limiting portion; one end of the first arc-shaped rotating arm is connected to the one side of the intermediate shell, and the other end of the first arc-shaped rotating arm has a first guide portion, and the first guide portion is connected to the first limiting portion in a relative arc-shaped swinging manner; one end of the second arc-shaped rotating arm is connected to the one side of the second shell, and the other end of the second arc-shaped rotating arm has a second guide portion, and the second guide portion is relatively The second limiting portion is connected in an arc-shaped swinging manner; one end of the first co-moving connecting rod has at least one first guide post, and the at least one first guide post is connected to the at least one first guide groove in a relatively movable manner, and the other end of the first co-moving connecting rod is connected to a first shaft member in a synchronous manner, and the first shaft member has a first gear, and the first gear is toothed in a gear synchronous assembly; one end of the second co-moving connecting rod has at least one second guide post, and the at least one second guide post is connected to the at least second guide groove in a relatively movable manner, and the other end of the second co-moving connecting rod is connected to a second shaft member in a synchronous manner, and the second shaft member has a second gear, and the second gear is toothed in the gear synchronous assembly, so that the first co-moving connecting rod and the second co-moving connecting rod can rotate in opposite directions relative to each other to open and close.

9. The flexible screen three-bend hinge structure according to claim 8, characterized in that: The gear synchronization assembly includes a third gear, an intermediate gear set and a fourth gear that mesh with each other in sequence. The third gear is connected to the first gear, and the fourth gear is connected to the second gear, so that the first and second synchronization connecting rods can rotate in opposite directions relative to each other to open and close.

10. The flexible screen three-bending axis structure according to claim 8, characterized in that: The first shell and the middle shell are folded relative to each other, the second shell covers the first shell, and the flexible screen forms a G-shaped three-fold shape.

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