Rotating shaft device, folding shell and electronic equipment

Abstract

The invention provides a rotating shaft device which comprises a base, a first rotating mechanism, a second rotating mechanism, a first connecting rod piece, a second connecting rod piece and a middle supporting piece. The second rotating mechanism comprises a second rotating piece rotationally connected to the other side of the base and a second connecting piece, one side of the first connecting rod piece is rotationally connected to the base, and the other side of the first connecting rod piece is slidably connected to the first connecting piece; one side of the second connecting rod piece is rotationally connected to the base, and the other side is slidably connected to the second connecting piece; the two middle supporting pieces are connected to the first connecting rod piece and the second connecting rod piece correspondingly and can rotate along with the first connecting rod piece and the second connecting rod piece correspondingly. The invention further provides the folding shell and the electronic equipment.

Description

Technical Field

[0001] The present invention relates to the field of electronic equipment, and in particular to a hinge device for supporting a flexible screen, a folding shell provided with the hinge device, and an electronic device provided with the folding shell. Background Art

[0002] The bendable flexible display screen of the foldable screen device in the related art is generally supported by a hinge device. The existing hinge device generally includes a support mechanism for supporting the flexible display screen. A support plate is provided between the flexible display screen and the support mechanism. The folding or unfolding of the support mechanism can drive the bendable flexible display screen to fold or unfold. The support mechanism generally includes a middle support hinge and two side support hinges, and the two side support hinges are respectively located on opposite sides of the middle support hinge. However, the total thickness of the middle support hinge, the side support hinge and the support plate is relatively large, which cannot meet the demand for the development of lightweight and thin foldable screen devices. Summary of the invention

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

[0004] The present application provides a rotating shaft device, which includes a base, a first rotating mechanism, a second rotating mechanism, a first connecting rod, a second connecting rod and a pair of middle support plates, the first rotating mechanism includes a first rotating member and a first connecting member, the first rotating member is rotatably connected to the first connecting member, and the end of the first rotating member away from the first connecting member is rotatably connected to one side of the base; the second rotating mechanism includes a second rotating member and a second connecting member, the second rotating member is rotatably connected to the second connecting member, and the end of the second rotating member away from the second connecting member is rotatably connected to the other side of the base. one side; one side of the first connecting rod is rotatably connected to one side of the base, and the side of the first connecting rod away from the base is slidably connected to the first connecting rod; one side of the second connecting rod is rotatably connected to one side of the base, and the side of the second connecting rod away from the base is slidably connected to the second connecting rod; one of the middle support plates is connected to the side of the first connecting rod close to the base and can rotate relative to the base with the first connecting rod, and the other middle support plate is connected to the side of the second connecting rod close to the base and can rotate relative to the base with the second connecting rod.

[0005] The present application also provides a folding shell, which includes a rotating shaft device and two frames, wherein the rotating shaft device includes a base, a first rotating mechanism, a second rotating mechanism, a first connecting rod, a second connecting rod and a pair of middle support plates, wherein the first rotating mechanism includes a first rotating member and a first connecting member, wherein the first rotating member is rotatably connected to the first connecting member, and an end of the first rotating member away from the first connecting member is rotatably connected to one side of the base; the second rotating mechanism includes a second rotating member and a second connecting member, wherein the second rotating member is rotatably connected to the second connecting member, and an end of the second rotating member away from the second connecting member is rotatably connected to the other side of the base. side; one side of the first connecting rod is rotatably connected to one side of the base, and the side of the first connecting rod away from the base is slidably connected to the first connecting member; one side of the second connecting rod is rotatably connected to one side of the base, and the side of the second connecting rod away from the base is slidably connected to the second connecting member; one of the middle support pieces is connected to the side of the first connecting rod close to the base and can rotate relative to the base with the first connecting rod, and the other middle support piece is connected to the side of the second connecting rod close to the base and can rotate relative to the base with the second connecting rod, and the opposite sides of the rotating shaft device are respectively connected to the two frames.

[0006] The present application also provides an electronic device, the electronic device includes a flexible screen, two frames and a hinge device, the hinge device includes a base, a first rotating mechanism, a second rotating mechanism, a first connecting rod, a second connecting rod and a pair of middle support plates, the first rotating mechanism includes a first rotating member and a first connecting member, the first rotating member is rotatably connected to the first connecting member, and the end of the first rotating member away from the first connecting member is rotatably connected to one side of the base; the second rotating mechanism includes a second rotating member and a second connecting member, the second rotating member is rotatably connected to the second connecting member, and the end of the second rotating member away from the second connecting member is rotatably connected to the other side of the base; the first connecting rod One side of the first connecting rod is rotatably connected to one side of the base, and the side of the first connecting rod away from the base is slidably connected to the first connecting rod; one side of the second connecting rod is rotatably connected to one side of the base, and the side of the second connecting rod away from the base is slidably connected to the second connecting rod; one of the middle support pieces is connected to the side of the first connecting rod close to the base and can rotate relative to the base with the first connecting rod, and the other middle support piece is connected to the side of the second connecting rod close to the base and can rotate relative to the base with the second connecting rod; the opposite sides of the rotating shaft device are respectively connected to the two frames, and the flexible screen is connected to the two frames and the rotating shaft device.

[0007] The side support plates and the middle support plates of the hinge device of the present invention replace the support mechanism of the hinge device in the prior art and the support plate between the support mechanism and the bendable flexible display screen, thereby reducing the thickness of the hinge device and the overall thickness of the electronic device, thus meeting the requirements for the development of lighter and thinner electronic devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the implementation. Obviously, the drawings described below relate to some implementations of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative work.

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

[0010] Figure 2 yes Figure 1 A schematic diagram of a three-dimensional structure decomposition of a foldable housing and a flexible screen of an electronic device;

[0011] Figure 3 yes Figure 2 A schematic diagram of the three-dimensional structure of the folded shell;

[0012] Figure 4 yes Figure 3 A schematic diagram of a three-dimensional structure explosion of the rotating shaft device;

[0013] Figure 5 yes Figure 4 A schematic diagram of the three-dimensional structure of the rotating shaft device from another perspective;

[0014] Figure 6 yes Figure 4 A schematic diagram of a three-dimensional structure explosion of the rotating shaft device;

[0015] Figure 7 yes Figure 5 A schematic diagram of a three-dimensional structure explosion of the rotating shaft device;

[0016] Figure 8 yes Figure 6 An enlarged three-dimensional structure diagram of one of the rotation-assisting mechanisms;

[0017] Fig. 9 yes Figure 8 A schematic diagram of the three-dimensional structure of the rotation-assisting mechanism from another perspective;

[0018] Fig.10 yes Figure 8 A schematic diagram of the three-dimensional structure of the rotation-assisting mechanism;

[0019] Fig.11 yes Fig. 9 A schematic diagram of the three-dimensional structure of the rotation-assisting mechanism;

[0020] Fig.12 yes Fig.10 A further schematic diagram of the three-dimensional structure decomposition of the rotation-assisting mechanism;

[0021] Fig.13 yes Fig.12 A schematic diagram of the three-dimensional structure of the rotation-assisting mechanism from another perspective;

[0022] Fig.14 yes Fig.13 An enlarged three-dimensional structure diagram of one of the connecting seats;

[0023] Fig.15 yes Fig.13 An enlarged three-dimensional structure diagram of one of the rotation-assisting support frames;

[0024] Fig.16 yes Figure 4 A three-dimensional cross-sectional view of the rotating shaft device;

[0025] Fig.17 yes Fig.16 A cross-sectional view of the rotating shaft device in FIG.

[0026] Fig.18 yes Figure 4 Another three-dimensional cross-sectional view of the rotating shaft device in FIG.

[0027] Fig.19 yes Fig.18 A cross-sectional view of the rotating shaft device in FIG.

[0028] Fig. 20 yes Figure 4 Another three-dimensional cross-sectional view of the rotating shaft device in FIG.

[0029] Fig.21 yes Fig. 20 A cross-sectional view of the rotating shaft device in FIG.

[0030] Fig. 22 yes Figure 2 A schematic diagram of a three-dimensional structure of the foldable shell in a fully folded state;

[0031] Fig.23 yes Fig. 22 A schematic diagram of the side structure of the folding shell in FIG.

[0032] Fig.24 yes Fig. 22 A schematic diagram of the three-dimensional structure of the rotating shaft device;

[0033] Fig.25 yes Fig.24A three-dimensional cross-sectional view of the rotating shaft device;

[0034] Fig.26 yes Fig.25 A cross-sectional view of the rotating shaft device in FIG.

[0035] Fig. 27 yes Fig.24 Another three-dimensional cross-sectional view of the rotating shaft device in FIG.

[0036] Fig.28 yes Fig. 27 A cross-sectional view of the rotating shaft device in FIG.

[0037] Fig.29 yes Fig.24 Another stereoscopic cross-sectional view in;

[0038] Fig.30 yes Fig.29 A cross-sectional view of the rotating shaft device in FIG.

[0039] Main markings:

[0040] 100. electronic device; 20. foldable housing; 30. flexible screen; 31. bendable area; 33. non-bending area; 40. frame; 402. front; 404. side; 405. end face; 406. mounting groove; 50. rotating shaft device; 501. side support sheet; 505. middle support sheet; 506. supporting sheet body; 507. connecting sheet body; 509. back cover; 5091. fixing groove; 51. rotation-assisting mechanism; 510. base; 5101. first rotating groove; 5102. first protrusion; 5103. second rotating groove; 5104. second protrusion; 5105. avoidance space; 5107. connecting tube; 5108. connecting hole; 515. connecting shaft; 52. first rotating mechanism; 521. first rotating mechanism Component; 5210, first arc rail; 5211, first adapter; 5212, first fitting surface; 5213, first back surface; 5215, first rotating part; 5216, first rotating rail; 525, first connecting member; 5250, first arc groove; 5251, first rotating part; 5252, first avoidance groove; 5253, first front surface; 5255, first guide slide; 5256, first avoidance space; 5257, first slide groove; 5258, first rotating groove; 53, second rotating mechanism; 531, second rotating member; 5310, second arc rail; 5311, second adapter; 5312, second fitting surface; 5313, second back surface; 5315, second rotating part; 5316, second rotating rail; 535, second connecting member; 5350, second arc groove; 5351, second rotating part; 5352, second avoidance groove; 5353, second front face; 5355, second guide slide part; 5356, second avoidance space; 5357, second slide groove; 5358, second rotating groove; 54, first connecting rod; 541, first rotating part; 5410, first rotating hole; 5411, first supporting block; 5412, first supporting surface; 5414, first connecting surface; 5416, first rotation-assisting column; 545, first sliding part; 5450, first slide rail; 5452, first avoidance groove; 5453, first adjusting rod; 546, first connecting frame; 5460, first rotation-assisting groove; 5460a, first abutting top; 54 60b, second abutment top; 5461, first support portion; 5462, first support bar; 5463, first connecting bar; 5465, first rotating piece; 5466, first rotating port; 556, second connecting frame; 5560, second rotation-assisting groove; 5560a, third abutment top; 5560b, fourth abutment top; 5561, second support portion; 5562, second support bar; 5563, second connecting bar; 5565, second rotating piece; 5566, second rotating port; 55, second connecting rod; 551, second rotating portion; 5510, second rotating hole; 5511, second support block; 5512, second support surface; 5514, second connecting surface; 5516, second rotation-assisting column; 555, second sliding portion;5550, second slide rail; 5552, second avoidance groove; 5553, second adjustment rod; 56, first connection seat; 560, third fitting surface; 561, first rotating rail; 562, first transfer part; 563, first adjustment groove; 5632, first positioning section; 5634, second positioning section; 564, first adjustment part; 566, first connection part; 567, first sleeve groove; 57, second connection seat; 570, fourth fitting surface; 571, second rotating rail; 572, second transfer part; 573, second adjustment groove; 5732, third positioning section; 5734, fourth positioning section; 574, second adjustment part; 576, second connection part; 577, second sleeve groove. ; DETAILED DESCRIPTION

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

[0042] In addition, the following descriptions of the various embodiments are made with reference to the attached drawings to illustrate specific embodiments that the present application may be implemented in. Directional terms mentioned in the present application, such as "upper", "lower", "front", "back", "left", "right", "inner", "outer", "side", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the present application, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0043] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set on..." should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] Please also read Figures 1 to 3The electronic device 100 in one embodiment of the present invention includes a foldable housing 20 and a flexible screen 30 disposed on the foldable housing 20. The foldable housing 20 includes two frames 40 and a hinge device 50 connected between the two frames 40. The two opposite sides of the hinge device 50 are respectively connected to the two frames 40. The two frames 40 are synchronously rotated through the hinge device 50 to achieve mutual folding or mutual flattening. The flexible screen 30 includes a bendable area 31 corresponding to the hinge device 50, and two non-bending areas 33 connected to the opposite sides of the bendable area 31. The flexible screen 30 is disposed on the front of the two frames 40 and the front of the hinge device 50; specifically, the two non-bending areas 33 of the flexible screen 30 can be fixed on the front of the two frames 40 respectively, and the bendable area 31 is attached to the front of the hinge device 50. The bendable area 31 of the flexible screen 30 can be bent or flattened with the hinge device 50. The flexible screen 30 can be, but is not limited to, various flexible components with corresponding functions such as a flexible display screen, a flexible touch screen, a flexible touch display screen, or a flexible component fixedly bonded to a flexible support plate, such as a flexible display screen bonded to a flexible steel plate, a flexible touch screen, etc.

[0045] Please also read Figure 4-Figure 9The rotating shaft device 50 includes a rotation-assisting mechanism 51, a side support sheet 501, a middle support sheet 505 and a back cover 509. The rotation-assisting mechanism 51 includes a base 510, a pair of connecting shafts 515, a first rotating mechanism 52, a second rotating mechanism 53, a first connecting rod 54 and a second connecting rod 55. The first rotating mechanism 52 includes a first rotating member 521 and a first connecting member 525. The first rotating member 521 is rotatably connected to the first connecting member 525. One end of the first rotating member 521 away from the first connecting member 525 is rotatably connected to one side of the base 510. The second rotating mechanism 53 includes a second rotating member 531 and a second connecting member 535. The second rotating member 531 is rotatably connected to the second connecting member 535. One end of the second rotating member 531 away from the second connecting member 535 is rotatably connected to the other side of the base 510. One side of the first connecting rod 54 is rotatably connected to one side of the base 510. The side of the first connecting rod 54 away from the base 510 is slidably connected to the first connecting member 525. One side of the second connecting rod 55 is rotatably connected to one side of the base 510. The second connecting rod 55 is away from the base 510. 0 is slidably connected to the second connecting member 535 on one side; specifically, a pair of connecting shafts 515 are connected to opposite sides of one end of the base 510, the side of the first connecting rod 54 away from the first connecting member 525 is rotatably connected to one of the connecting shafts 515, and the side of the second connecting rod 55 away from the second connecting member 535 is rotatably connected to the other connecting shaft 515; two side support pieces 501 are respectively located on opposite sides of the base 510, wherein one side support piece 501 is connected to the front side of the first rotating member 521 and can rotate with the first rotating member 521 relative to the base 5 10 rotation, the other side support piece 501 is connected to the front side of the second rotating member 531 and can rotate with the second rotating member 531 relative to the base 510; one of the middle support pieces 505 is connected to the side of the first connecting rod 54 close to the base 510 and can rotate with the first connecting rod 54 relative to the base 510, and the other middle support piece 505 is connected to the side of the second connecting rod 55 close to the base 510 and can rotate with the second connecting rod 55 relative to the base 510, so that a pair of side support pieces 501 and the middle support piece 505 are folded or unfolded with each other. When the hinge device 50 is in a flattened state, the front of the side support sheet 501 and the front of the middle support sheet 505 are coplanar, and the back of the bendable area 31 of the flexible screen 30 is attached to the front of the side support sheet 501 and the front of the middle support sheet 505; when the hinge device 50 is in a folded state, the front of the side support sheet 501 and the front of the middle support sheet 505 form a U-shaped space or a teardrop-shaped space, and the bendable area 31 is bent and accommodated in the U-shaped space or the teardrop-shaped space. In this embodiment, the front of the side support sheet 501 and the front of the middle support sheet 505 form a teardrop-shaped space.

[0046] In this embodiment, the front side refers to the side facing the same direction as the light emitting side of the flexible screen 30, and the back side refers to the side facing away from the light emitting side of the flexible screen 30. The electronic device 100 is, for example, but not limited to, a mobile phone, a tablet computer, a display, a liquid crystal panel, an OLED panel, a television, a smart watch, a VR head-mounted display, a car display, and any other product or component with a display function.

[0047] When the hinge device 50 is folded, the first rotating mechanism 52 and the second rotating mechanism 53 rotate relative to the base 510 and move closer to each other, and the two side support pieces 501 rotate along with the first rotating member 521 and the second rotating member 531 and move closer to each other; at the same time, the first connecting member 525 drives the first connecting rod 54 to rotate relative to the base 510, and the second connecting member 535 drives the second connecting rod 55 to rotate relative to the base 510, and the two middle support pieces 505 rotate along with the first connecting rod 54 and the second connecting rod 55 and move closer to each other until the two side support pieces 501 and the middle support piece 505 form a teardrop-shaped space, and the bendable area 31 bends along with the side support pieces 501 and the middle support piece 505 and is accommodated in the teardrop-shaped space. When the rotating shaft device 50 is flattened, the first rotating mechanism 52 and the second rotating mechanism 53 rotate relative to the base 510 and move away from each other, and the two side support plates 501 rotate with the first rotating member 521 and the second rotating member 531 and move away from each other; at the same time, the first connecting member 525 drives the first connecting rod 54 to rotate relative to the base 510, and the second connecting member 535 drives the second connecting rod 55 to rotate relative to the base 510, and the two middle support plates 505 rotate with the first connecting rod 54 and the second connecting rod 55 and move away from each other until the front side of the side support plate 501 and the front side of the middle support plate 505 are coplanar, and the bendable area 31 is flattened with the side support plate 501 and the middle support plate 505.

[0048] The side support pieces 501 and the middle support piece 505 of the hinge device 50 of the present invention replace the support mechanism of the hinge device in the prior art and the support plate located between the support mechanism and the bendable flexible display screen, thereby reducing the thickness of the hinge device 50 and the overall thickness of the electronic device 100, thereby meeting the requirements for the development of lighter and thinner electronic devices 100.

[0049] Optionally, the thickness range of the side support sheet 501 is 0.03 mm to 0.50 mm, specifically, the thickness of the side support sheet 501 can be but not limited to 0.03 mm, 0.04 mm, 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm or 0.5 mm, etc.; the thickness range of the middle support sheet 505 is 0.03 mm to 0.50 mm, specifically, the thickness of the middle support sheet 505 can be but not limited to 0.03 mm, 0.04 mm, 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm or 0.5 mm, etc.

[0050] Optionally, the side support sheet 501 and the middle support sheet 505 may be, but are not limited to, sheets having a supporting effect such as stainless steel sheets, carbon fiber sheets, polyimide sheets, and polyester resin sheets.

[0051] like Figure 2 and Figure 7 As shown, the frame 40 includes a front face 402, a back face, two opposite side faces 404 and two end faces 405. The hinge device 50 is connected between two adjacent side faces 404 of the two frames 40. The bendable area 31 of the flexible screen 30 is attached to the front face of the hinge device 50, and the non-bending area 33 of the flexible screen 30 is connected to the front face 402 of the frame 40. A mounting groove 406 is provided on one side of the front face 402 of each frame 40 close to the hinge device 50. One side of the mounting groove 406 passes through the front face 402 of the frame 40, and the opposite ends of the mounting groove 406 pass through the opposite end faces 405 of the frame 40. The opposite sides of the hinge device 50 are respectively accommodated in the mounting grooves 406 of the two frames 40, that is, the first connecting member 525 of the first rotating mechanism 52 is connected to the mounting groove 406 of one of the frames 40, and the second connecting member 535 of the second rotating mechanism 53 is connected to the mounting groove 406 of the other frame 40. The back of the frame 40 is provided with a plurality of receiving spaces (not shown in the figure), and the receiving spaces are used to install electronic components such as circuit boards and batteries.

[0052] like Figure 3-Figure 13As shown, the first rotation axis L1 between the first rotating member 521 and the first connecting member 525, the second rotation axis L2 between the first rotating member 521 and the base 510, and the third rotation axis L3 between the first connecting rod member 54 and the base 510 are parallel to each other; the first rotation axis L1 between the second rotating member 531 and the second connecting member 535, the second rotation axis L2 between the second rotating member 531 and the base 510, and the third rotation axis L3 between the second connecting rod member 55 and the base 510 are parallel to each other; the two first rotation axis L1 are respectively located on opposite sides of the base 510, and the two second rotation axes L2 and the two third rotation axis L3 are located between the two first rotation axis L1.

[0053] The first rotating member 521 and the first connecting member 525 are rotatably connected through the cooperation of the first arc track and the first arc groove, the first arc track is provided on one of the first rotating member 521 and the first connecting member 525, and the first arc groove is provided on the other of the first rotating member 521 and the first connecting member 525. In this embodiment, the first arc groove 5250 is provided on a side of one end of the first connecting member 525 away from the base 510, and the first arc track 5210 is provided on one end of the first rotating member 521 away from the base 510. Specifically, the first connecting member 525 includes a first rotating portion 5251 and a first guiding portion 5255 located at opposite ends thereof, a first front face 5253 of the first rotating portion 5251 is provided with a first avoiding groove 5252, opposite sides of the first avoiding groove 5252 respectively penetrate the first front face 5253 and the back face of the first rotating portion 5251, the first rotating portion 5251 is provided with first arc grooves 5250 spaced apart from each other at opposite end faces of the first avoiding groove 5252, opposite ends of the first arc groove 5250 close to the side of the base 510 respectively penetrate the first front face 5253 and the back face of the first rotating portion 5251, and opposite ends of the first arc groove 5250 away from the side of the base 510 respectively penetrate the first front face 5253 and the back face of the first rotating portion 5251. 53 and the side facing away from the base 510, optionally, the first front side 5253 of the first rotating part 5251 is an inclined surface; the first rotating member 521 includes a first adapter part 5211 and a first rotating part 5215 located at opposite ends thereof, and the first adapter part 5211 is rotatably connected to the first rotating part 5251; the first rotating member 521 has a first fitting surface 5212 and a first back side 5213 facing away from the first fitting surface 5212, and the first back side 5213 is provided with a first circular arc rail 5210, specifically, the first back side 5213 of the first adapter part 5211 is provided with two first circular arc rails 5210 spaced from each other on the side away from the first rotating part 5215, and the two first circular arc rails 5210 are respectively rotatably inserted into the two first circular arc grooves 5250. Optionally, the first back surface 5213 of the first rotating portion 5251 is an inclined surface; when the rotating shaft device 50 is in a bent state, the first front surface 5253 of the first connecting member 525 is attached to the first back surface 5213 of the first rotating portion 5251 .

[0054] In other embodiments, the first rotating part 5251 is respectively provided with first arc rails on the opposite end surfaces of the first avoidance groove 5252, and the back side 5213 of the first rotating part 5251 is provided with a first arc groove at one end away from the base 510, and the first arc rail is rotatably inserted in the first arc groove.

[0055] The first rotating part 5215 is rotatably connected to one side of the base 510 through the cooperation of the first rotating rail and the first rotating groove; the first rotating rail is provided on one of the first rotating part 5215 and the base 510, and the first rotating groove is provided on the other of the first rotating part 5215 and the base 510. In this embodiment, first rotating rails 5216 are provided on opposite sides of the first rotating part 5215, and the two first rotating rails 5216 are coaxial, and first rotating grooves 5101 are provided on opposite ends of one side of the base 510, and the two first rotating grooves 5101 are coaxial, and the two first rotating rails 5216 are rotatably accommodated in the two first rotating grooves 5101.

[0056] In other embodiments, first rotation grooves are respectively provided on opposite sides of the first rotating portion 5215, and the two first rotation grooves are coaxial, and first rotation rails are respectively provided on opposite ends of one side of the base 510, and the two first rotation rails are coaxial, and the two first rotation rails are respectively rotatably accommodated in the two first rotation grooves.

[0057] The end of the first link member 54 away from the base 510 is slidably connected to the first guide slide 5255 through the cooperation of the first slide rail and the first slide groove. The first slide rail is provided on one of the first link member 54 and the first guide slide 5255, and the first slide groove is provided on the other of the first link member 54 and the first slide. The first guide slide 5255 is provided with a first avoidance space 5256. In this embodiment, the first avoidance space 5256 is provided on the front of the first guide slide 5255, and the first guide slide 5255 is provided with first slide grooves 5257 on two opposite inner side surfaces of the first avoidance space 5256, respectively. The length direction of the first slide groove 5257 is perpendicular to the axis of the first arc groove 5250, and the opposite ends of the first slide groove 5257 pass through the opposite side surfaces of the first guide slide 5255. A first rotating groove 5258 is provided at one end of the first guide sliding portion 5255 away from the first rotating portion 5251. The first rotating groove 5258 is an arc groove, and the axis line of the first arc groove 5250 is parallel to the axis line of the first rotating groove 5258; preferably, the first rotating groove 5258 and the first arc groove 5250 are coaxial. The first connecting rod member 54 includes a first rotating portion 541 and a first sliding portion 545 connected to the first rotating portion 541, the first rotating portion 541 is connected to one of the connecting shafts 515, and the first rotating portion 541 can rotate relative to the base 510 around the axis of the corresponding connecting shaft 515; the first sliding portion 545 can be slidably accommodated in the first avoidance space 5256, and the first sliding portion 545 and the first connecting member 525 are slidably connected to each other through the cooperation of a first slide rail and a first slide groove, and the length direction of the first slide rail is perpendicular to the rotation axis between the first connecting rod member 54 and the base 510, the first slide rail is provided at one of the first sliding portion 545 and the first guide slide portion 5255, and the first slide groove is provided at the other of the first sliding portion 545 and the first guide slide portion 5255. In this embodiment, the first rotating part 541 is a first rotating cylinder, which is provided with a first rotating hole 5410 along its axial direction; the first sliding part 545 is a first sliding plate, one side of which is connected to the outer peripheral surface of the first rotating part 541, and the first sliding part 545 is provided with first sliding rails 5450 on opposite sides of the axial direction of the first rotating cylinder, respectively. The length direction of the first sliding rails 5450 is perpendicular to the axial direction of the first rotating part 541, and the two first sliding rails 5450 are respectively slidably accommodated in the two first sliding grooves 5257 of the first guiding part 5255. The first sliding portion 545 is provided with a first avoidance groove 5452, and the length direction of the first avoidance groove 5452 is perpendicular to the axial direction of the first rotating portion 541; specifically, the first avoidance groove 5452 is located at one end of the first sliding portion 545 away from the first rotating portion 541, one end of the first avoidance groove 5452 passes through the end surface of the first sliding portion 545 facing away from the first rotating portion 541, and the other end of the first avoidance groove 5452 is close to the first rotating portion 541.In other embodiments, the first guide slide portion 5255 is provided with first slide rails on two opposite sides of the first avoidance space 5256, and first slide grooves are provided at two opposite ends of the first sliding portion 545, respectively, and the two first slide rails can be slidably accommodated in the two first slide grooves. The first sliding portion 545 is provided with a first adjustment rod 5453 protruding from one inner side surface of the first avoidance groove 5452, and the axial direction of the first adjustment rod 5453 is parallel to the axial direction of the first rotating portion 541. The outer circumference of the first rotating part 541 is provided with a first supporting surface 5412 and a first connecting surface 5414 connected to the first supporting surface 5412. The first connecting surface 5414 is connected to the first supporting surface 5412 and is closer to the first sliding part 545 than the first supporting surface 5412. Specifically, the outer circumference of the first guide slide 5255 is provided with a first supporting block 5411 near the first sliding part 545. The first connecting surface 5414 and the first supporting surface 5412 are located on the side of the first supporting block 5411 away from the first rotating part 541, and the first connecting surface 5414 is inclined relative to the first supporting surface 5412. The first rotating part 541 is provided with first auxiliary rotation columns 5416 at opposite end surfaces along the axial direction thereof. The two first auxiliary rotation columns 5416 are coaxial, and the axis of the first auxiliary rotation column 5416 is parallel to the axis of the first rotating part 541.

[0058] The second rotating member 531 and the second connecting member 535 are rotatably connected through the cooperation of the second circular arc rail and the second circular arc groove. The second circular arc rail is provided on one of the second rotating member 531 and the second connecting member 535, and the second circular arc groove is provided on the other of the second rotating member 531 and the second connecting member 535. In this embodiment, a second circular arc groove 5350 is provided on the side of one end of the second connecting member 535 away from the base 510, and a second circular arc rail 5310 is provided on the end of the second rotating member 531 away from the base 510. Specifically, the second connecting member 535 includes a second rotating portion 5351 and a second guiding portion 5355 located at opposite ends thereof, the second front side 5353 of the second rotating portion 5351 is provided with a second avoiding groove 5352, and the opposite sides of the second avoiding groove 5352 respectively penetrate the second front side 5353 and the back side of the second rotating portion 5351, and the second rotating portion 5351 is provided with second arc grooves 5350 spaced from each other on the opposite end surfaces of the second avoiding groove 5352, and the opposite ends of the second arc groove 5350 close to the base 510 respectively penetrate the second front side 5353 and the back side of the second rotating portion 5351, and the opposite ends of the second arc groove 5350 away from the base 510 respectively penetrate the second front side 5353 and the back side of the second rotating portion 5351. 53 and the side facing away from the base 510; optionally, the second front side 5353 of the second rotating portion 5351 is an inclined surface; the second rotating member 531 includes a second adapter portion 5311 and a second rotating portion 5315 located at opposite ends thereof, the second adapter portion 5311 is rotatably connected to the second rotating portion 5351, the second rotating member 531 has a second fitting surface 5312 and a second back side 5313 facing away from the second fitting surface 5312, the second back side 5313 is provided with a second circular arc rail 5310, specifically, the second back side 5313 of the second adapter portion 5311 is provided with two second circular arc rails 5310 spaced apart from each other on a side away from the second rotating portion 5315, and the two second circular arc rails 5310 are rotatably inserted into the two second circular arc grooves 5350, respectively. Optionally, the second back surface 5313 of the second adapter portion 5311 is an inclined surface, and when the hinge device 50 is in a bent state, the second front surface 5353 of the second connecting member 535 is attached to the second back surface 5313 of the second adapter portion 5311 .

[0059] In other embodiments, the second rotating portion 5351 is respectively provided with second arc rails on the opposite end surfaces of the second avoidance groove 5352, and the second back side 5313 of the second adapter portion 5311 is provided with a second arc groove at one end away from the base 510, and the second arc rail is rotatably inserted in the second arc groove.

[0060] The second rotating part 5315 is rotatably connected to one side of the base 510 through the cooperation of the second rotating rail and the second rotating groove; the second rotating rail is provided on one of the second rotating part 5315 and the base 510, and the second rotating groove is provided on the other of the second rotating part 5315 and the base 510. In this embodiment, the second rotating part 5315 is provided with second rotating rails 5316 on opposite sides, and the two second rotating rails 5316 are coaxial, and the second rotating grooves 5103 are provided on opposite ends of the other side of the base 510, and the two second rotating grooves 5103 are coaxial, and the two second rotating rails 5316 are rotatably accommodated in the two second rotating grooves 5103.

[0061] In other embodiments, second rotating grooves are respectively provided on the opposite sides of the second rotating portion 5315, and the two second rotating grooves are coaxial, and second rotating rails are respectively provided on the opposite ends of the other side of the base 510, and the two second rotating rails are coaxial, and the two second rotating rails are respectively rotatably accommodated in the two second rotating grooves.

[0062] The end of the second link member 55 away from the base 510 is slidably connected to the second guide slide 5355 through the cooperation of the first slide rail and the first slide groove. The first slide rail is provided on one of the second link member 55 and the second guide slide 5355, and the first slide groove is provided on the other of the second link member 55 and the second guide slide 5355. The second guide slide 5355 is provided with a second avoidance space 5356. In this embodiment, the second avoidance space 5356 is provided on the front of the second guide slide 5355, and the second guide slide 5355 is provided with second slide grooves 5357 on two opposite inner side surfaces of the second avoidance space 5356, respectively. The length direction of the second slide groove 5357 is perpendicular to the axis of the second arc groove 5350, and the opposite ends of the second slide groove 5357 pass through the opposite side surfaces of the second guide slide 5355. A second rotating groove 5358 is provided at one end of the second guide sliding portion 5355 away from the second rotating portion 5351. The second rotating groove 5358 is an arc groove, and the axis line of the second arc groove 5350 is parallel to the axis line of the second rotating groove 5358; preferably, the second rotating groove 5358 and the second arc groove 5350 are coaxial. The second connecting rod member 55 includes a second rotating portion 551 and a second sliding portion 555 connected to the second rotating portion 551, the second rotating portion 551 is connected to another connecting shaft 515, and the second rotating portion 551 can rotate relative to the base 510 around the axis of the connecting shaft 515; the second sliding portion 555 can be slidably accommodated in the second avoidance space 5356, and the second sliding portion 555 and the second connecting member 535 are slidably connected to each other through the cooperation of a second slide rail and a second slide groove, and the length direction of the second slide rail is perpendicular to the rotation axis between the second connecting rod member 55 and the base 510, the second slide rail is provided at one of the second sliding portion 555 and the second guide slide portion 5355, and the second slide groove is provided at the other of the second sliding portion 555 and the second guide slide portion 5355. In this embodiment, the second rotating part 551 is a second rotating cylinder, which is provided with a second rotating hole 5510 along its axial direction; the second sliding part 555 is a second sliding plate, one side of which is connected to the outer peripheral surface of the second rotating part 551, and the second sliding part 555 is provided with second sliding rails 5550 on opposite sides of the axial direction of the second rotating cylinder, respectively. The length direction of the second sliding rails 5550 is perpendicular to the axial direction of the second rotating part 551, and the two second sliding rails 5550 are respectively slidably accommodated in the two second sliding grooves 5357 of the second guide sliding part 5355. The second sliding portion 555 is provided with a second avoidance groove 5552, and the length direction of the second avoidance groove 5552 is perpendicular to the axial direction of the second rotating portion 551; specifically, the second avoidance groove 5552 is located at one end of the second sliding portion 555 away from the second rotating portion 551, one end of the second avoidance groove 5552 passes through the end surface of the second sliding portion 555 facing away from the second rotating portion 551, and the other end of the second avoidance groove 5552 is close to the first rotating portion 541.In other embodiments, the second guide slide portion 5355 is provided with second slide rails on two opposite sides of the second avoidance space 5356, and second slide grooves are provided at two opposite ends of the second sliding portion 555, respectively, and the two second slide rails can be slidably accommodated in the two second slide grooves. The second sliding portion 555 is provided with a second adjustment rod 5553 protruding from one inner side surface of the second avoidance groove 5552, and the axial direction of the second adjustment rod 5553 is parallel to the axial direction of the second rotating portion 551. The outer peripheral surface of the second rotating portion 551 is provided with a second supporting surface 5512 and a second connecting surface 5514 connected to the second supporting surface 5512, and the second connecting surface 5514 is connected to the second supporting surface 5512, and the second connecting surface 5514 is closer to the second sliding portion 555 than the second supporting surface 5512. Specifically, a second support block 5511 is provided on the outer circumference of the second rotating portion 551 near the second sliding portion 555, a second connecting surface 5514 and a second supporting surface 5512 are located on the side of the second supporting block 5511 away from the second rotating portion 551, and the second connecting surface 5514 is inclined relative to the second supporting surface 5512. Second rotation-assisting columns 5516 are provided on opposite end surfaces of the second rotating portion 551 along the axial direction, respectively, and the two second rotation-assisting columns 5516 are coaxial, and the axis of the second rotation-assisting columns 5516 is parallel to the axis of the second rotating portion 551.

[0063] like Fig.12 and Fig.13 As shown, the base 510 is a rectangular block, and a pair of first protrusions 5102 are provided on one side of the front of the base 510, and the pair of first protrusions 5102 are respectively located at opposite ends of the base 510; a pair of second protrusions 5104 are provided on the other side of the front of the base 510, and the pair of second protrusions 5104 are respectively located at opposite ends of the base 510. Two first rotation grooves 5101 are respectively located at the two end surfaces of the pair of first protrusions 5102 facing each other, and two second rotation grooves 5103 are respectively located at the two end surfaces of the pair of second protrusions 5104 facing each other. A space 5105 is provided between the pair of first protrusions 5102 and the pair of second protrusions 5104 on the front of the base 510. Connecting cylinders 5107 are respectively provided on opposite sides of one end surface of the base 510, and the axial direction of the connecting cylinder 5107 is parallel to the axial direction of the first rotating groove 5101, and the connecting cylinder 5107 is provided with a connecting hole 5108 along its axial direction.

[0064] Please also read Figure 3-Figure 7 and Figure 12-14The rotation-assisting mechanism 51 further includes a first connection seat 56 and a second connection seat 57. The first connection seat 56 is rotatably connected to the first connection member 525. The first connecting rod 54 is movably connected to the first connection seat 56 at a side away from the base 510, wherein a side support sheet 501 is connected to the front of the first connection seat 56. The second connection seat 57 is rotatably connected to the second connection member 535. The second connecting rod 55 is movably connected to the second connection seat 57 at a side away from the base 510, and the other side support sheet 501 is connected to the front of the second connection seat 57. The front of the first connection seat 56 is a third bonding surface 560, and the front of the second connection seat 57 is a fourth bonding surface 570. The back of one side support sheet 501 is bonded to the third bonding surface 560, and the back of the other side support sheet 501 is bonded to the fourth bonding surface 570. The first connecting seat 56 and the first connecting member 525 are rotatably connected through the cooperation of the first rotating rail and the first rotating groove. The first rotating rail is provided at one of the first connecting seat 56 and the first connecting member 525, and the first rotating groove is provided at the other of the first connecting seat 56 and the first connecting member 525. In this embodiment, one end of the first connecting member 525 is provided with a first rotating groove 5258, and the first connecting seat 56 is provided with a first rotating rail 561, which is rotatably inserted into the first rotating groove 5258. The second connecting seat 57 and the second connecting member 535 are rotatably connected through the cooperation of the second rotating rail and the second rotating groove. The second rotating rail is provided at one of the second connecting seat 57 and the second connecting member 535, and the second rotating groove is provided at the other of the second connecting seat 57 and the second connecting member 535. In this embodiment, a second rotating groove 5358 is provided at one end of the second connecting member 535, and the second connecting seat 57 is provided with a second rotating rail 571, and the second rotating rail 571 is rotatably inserted in the second rotating groove 5358.

[0065] Optionally, the first connecting seat 56 and the first connecting rod 54 are connected by a first adjustment groove and a first adjustment rod, the first adjustment groove is provided in one of the first connecting seat 56 and the first connecting rod 54, and the first adjustment rod is provided in the other of the first connecting seat 56 and the first connecting rod 54. In this embodiment, the first connecting rod 54 is provided with a first adjustment rod 5453, and the first connecting seat 56 is provided with a first adjustment groove 563; the first adjustment groove 563 has a first positioning section 5632 and a second positioning section 5634 located at opposite ends thereof, and the first positioning section 5632 is farther away from the base 510 than the second positioning section 5634; the second connecting seat 57 and the second connecting rod 55 are connected by a second adjustment groove and a second adjustment rod, the second adjustment groove is provided in one of the second connecting seat 57 and the second connecting rod 55, and the second adjustment rod is provided in the other of the second connecting seat 57 and the second connecting rod 55. In this embodiment, the second connecting rod 55 is provided with a second adjusting rod 5553, and the second connecting seat 57 is provided with a second adjusting groove 573. The second adjusting groove 573 has a third positioning section 5732 and a fourth positioning section 5734 located at opposite ends thereof, and the third positioning section 5732 is farther away from the base 510 than the fourth positioning section 5734. When the pair of side support sheets 501 and the pair of middle support sheets 505 are in a flattened state, the first adjusting rod 5453 is positioned at the first positioning section 5632, and the second adjusting rod 5553 is positioned at the third positioning section 5732; when the pair of side support sheets 501 and the pair of middle support sheets 505 are in a folded state, the first adjusting rod 5453 is positioned at the second positioning section 5634, and the second adjusting rod 5553 is positioned at the fourth positioning section 5734.

[0066] The first connecting seat 56 includes a first adapter portion 562, a first adjusting portion 564 and a first connecting portion 566 connected to the first adapter portion 562 and the first adjusting portion 564, the first rotating rail 561 is provided on the first adapter portion 562, and the first adjusting groove 563 is provided on the first adjusting portion 564; the second connecting seat 57 includes a second adapter portion 572, a second adjusting portion 574 and a second connecting portion 576 connected to the second adapter portion 572 and the second adjusting portion 574, the second rotating rail 571 is provided on the second adapter portion 572, and the second adjusting groove 573 is provided on the second adjusting portion 574. Specifically, the first connecting portion 566 is a first rectangular plate, the first adapter portion 562 and the first adjusting portion 564 are disposed at opposite ends of one side of the first rectangular plate, and the first connecting portion 562, the first adjusting portion 564 and the first connecting portion 566 form a first sleeve groove 567; the second connecting portion 576 is a second rectangular plate, the second adapter portion 572 and the second adjusting portion 574 are disposed at opposite ends of the second rectangular plate, and the second connecting portion 572, the second adjusting portion 574 and the second connecting portion 576 form a second sleeve groove 577. Optionally, the side of the first adjusting portion 564 facing away from the first connecting portion 566 is set as a first arc surface, and the side of the second adjusting portion 574 facing away from the second connecting portion 576 is set as a second arc surface. The first adjustment portion 564 is accommodated in the first avoidance groove 5452 so that the first adjustment rod 5453 can be slidably accommodated in the first adjustment groove 563 ; the second adjustment portion 574 is accommodated in the second avoidance groove 5552 so that the second adjustment rod 5553 can be slidably accommodated in the second adjustment groove 573 .

[0067] Please also read Figure 4-Figure 7 , Figure 12-13 and Fig.15The rotation-assisting mechanism 51 also includes a first connecting frame 546 and a second connecting frame 556. The first connecting frame 546 is rotatably sleeved on one of the connecting shafts 515, and the first connecting frame 546 is connected to the first rotating portion 541. The second connecting frame 556 is rotatably sleeved on the other connecting shaft 515, and the second connecting frame 556 is connected to the second rotating portion 551. One middle support plate 505 is connected to the first connecting frame 546, and the other middle support plate 505 is connected to the second connecting frame 556. When the first connecting rod 54 rotates around the axis of the corresponding connecting shaft 515, it can drive the first connecting frame 546 and the corresponding middle support plate 505 to rotate together. The second connecting rod 55 rotates around the axis of the corresponding connecting shaft 515 to drive the second connecting frame 556 and the corresponding middle support plate 505 to rotate together. The first connecting frame 546 and the first rotating part 541 are connected by the cooperation of the first rotation-assisting groove and the first rotation-assisting column. The first rotation-assisting groove is provided in one of the first rotating part 541 and the first connecting frame 546, and the first rotation-assisting column is provided in the other of the first rotating part 541 and the first connecting frame 546. In this embodiment, the first connecting frame 546 is provided with a first rotation-assisting groove 5460, and the first rotation-assisting column 5416 is provided in the first rotating part 541; the second connecting frame 556 and the second rotating part 551 are connected by the cooperation of the second rotation-assisting groove and the second rotation-assisting column. The second rotation-assisting groove is provided in one of the second rotating part 551 and the second connecting frame 556, and the second rotation-assisting column is provided in the other of the second rotating part 551 and the second connecting frame 556; in this embodiment, the second connecting frame 556 is provided with a second rotation-assisting groove 5560, and the second rotation-assisting column 5516 is provided in the second rotating part 551. The first rotation-assisting groove 5460 is a first arc groove, and the first rotation-assisting column 5416 can slide along the first rotation-assisting groove 5460; the second rotation-assisting groove 5560 is a second arc groove, and the second rotation-assisting column 5516 can slide along the second rotation-assisting groove 5560. Specifically, the first connecting frame 546 includes a first supporting portion 5461 and two first rotating pieces 5465 connected to opposite ends of the first supporting portion 5461, and the two first rotating pieces 5465 can be respectively attached to opposite end surfaces of the first rotating portion 541, the first rotation-assisting groove 5460 is provided on the first rotating piece 5465, the first rotation-assisting column 5416 is provided on the end surface of the first rotating portion 541, and the end of the first rotating piece 5465 away from the first supporting portion 5461 is rotatably sleeved on the corresponding connecting shaft 515; the second connecting frame 556 includes a second supporting portion 5561 and a second rotating piece 5565 connected to the opposite ends of the second supporting portion 5561, the two second rotating pieces 5565 are respectively attached to the opposite end surfaces of the second rotating portion 551, the second rotation-assisting groove 5560 is provided on the second rotating piece 5565, the second rotation-assisting column 5516 is provided on the end surface of the second rotating portion 551, and the second rotating piece 5565 is rotatably sleeved on the corresponding connecting shaft 515 at one end away from the second supporting portion 5561.The first rotating piece 5465 is provided with a first rotating opening 5466 at one end away from the first supporting part 5461, and the first rotating opening 5466 is rotatably sleeved on the corresponding connecting shaft 515, and the first rotation-assisting groove 5460 is located between the first supporting part 5461 and the first rotating opening 5466; the second rotating piece 5565 is provided with a second rotating opening 5566 at one end away from the second supporting part 5561, and the second rotating opening 5566 is rotatably sleeved on the corresponding connecting shaft 515, and the second rotation-assisting groove 5560 is located between the second supporting part 5561 and the second rotating opening 5566. In this embodiment, the first rotating opening 5466 is a semicircular opening, and the two first rotating openings 5466 are coaxial; the second rotating opening 5566 is a semicircular opening, and the two second rotating openings 5566 are coaxial.

[0068] Optionally, the first rotation-assisting groove 5460 includes a first abutment top portion 5460a and a second abutment top portion 5460b located at opposite ends thereof, and the first abutment top portion 5460a is farther away from the base 510 than the second abutment top portion 5460b; the second rotation-assisting groove 5560 includes a third abutment top portion 5560a and a fourth abutment top portion 5560b located at opposite ends thereof, and the third abutment top portion 5560a is farther away from the base 510 than the fourth abutment top portion 5560b. When a pair of side support sheets 501 and a pair of middle support sheets 505 are in a flattened state, the first auxiliary rotation column 5416 abuts against the first abutment top portion 5460a, and the second auxiliary rotation column 5516 abuts against the third abutment top portion 5560a; when a pair of side support sheets 501 and a pair of middle support sheets 505 are in a folded state, the first auxiliary rotation column 5416 abuts against the second abutment top portion 5460b, and the second auxiliary rotation column 5516 abuts against the fourth abutment top portion 5560b.

[0069] The first support portion 5461 includes a first support bar 5462 and a first connecting bar 5463 connected to one side of the first support bar 5462, and the first connecting bar 5463 is inclined relative to the first support bar 5462; the second support portion 5561 includes a second support bar 5562 and a second connecting bar 5563 connected to one side of the second support bar 5562, and the second connecting bar 5563 is inclined relative to the second support bar 5562. Specifically, the first support bar 5462 and the first connecting bar 5463 are both rectangular sheets, and the two first rotating sheets 5465 are respectively connected to the opposite ends of the rectangular sheet; the second support bar 5562 and the second connecting bar 5563 are both rectangular sheets, and the two second rotating sheets 5565 are respectively connected to the opposite ends of the rectangular sheet. When the rotating shaft device 50 is in a flattened state, the front surface of the first support bar 5462 is coplanar with the front surface of the second support bar 5562.

[0070] like Figure 4-Figure 7 and Figure 12-13As shown, the middle support sheet 505 includes a strip-shaped support sheet 506 and a connecting sheet 507 connected to one side of the support sheet 506, wherein the connecting sheet 507 of one middle support sheet 505 is connected to the first connecting strip 5463, and the connecting sheet 507 of the other middle support sheet 505 is connected to the second connecting strip 5563; when the rotating shaft device 50 is in a flattened state, the first supporting strip 5462 and the second supporting strip 5562 are respectively supported on the corresponding support sheet 506. Optionally, the support sheet 506 can be bent, and the bending axis of the support sheet 506 is parallel to the axis of the connecting shaft 515. When the rotating shaft device 50 is in a folded state, the support sheet 506 is in a bent state, and the two support sheets 505 enclose a circular arc-shaped receiving space, and the support sheet 506 has an elastic reset force. In some embodiments, the front of the middle support sheet 505 is provided with a plurality of through holes to facilitate the bending or resetting of the middle support sheet 505; specifically, the front of the support sheet body 506 is provided with multi-phase through holes. The front of the back cover 509 is provided with a fixing groove 5091, and the fixing groove 5091 is used to fix the base 510. In some embodiments, the front of the side support sheet 501 can also be provided with a plurality of through holes to improve the rigid rebound distribution of the side support sheet 501 on the basis of providing sufficient supporting force for the side support sheet 501.

[0071] In this embodiment, the rotating shaft device 50 includes three rotation-assisting mechanisms 51, a pair of side support sheets 501 and two pairs of middle support sheets 505. The three rotation-assisting mechanisms 51 are arranged along a direction parallel to the folding axis of the rotating shaft device 50; the back side of one side support sheet 501 is connected to the first fitting surfaces 5212 of the three first rotating members 521 on one side of the rotating shaft device 50 and the third fitting surfaces 560 of the three first connecting seats 56, and the back side of the other side support sheet 501 is connected to the three second rotating members 521 on the opposite side of the rotating shaft device 50. The second fitting surface 5312 of the movable member 531 and the fourth fitting surface 570 of the three second connecting seats 57; one of a pair of middle support plates 505 is connected to the two first connecting rod members 54 on the same side of two adjacent auxiliary rotation mechanisms 51, and the other is connected to the two second connecting rod members 55 on the other side of the two auxiliary rotation mechanisms 51; one of the other pair of middle support plates 505 is connected to the first connecting rod member 54 on one side of another auxiliary rotation mechanism 51, and the other is connected to the second connecting rod member 55 on the other side of the other auxiliary rotation mechanism 51.

[0072] In other embodiments, the pivot device 50 includes two rotation-assisting mechanisms 51, a pair of side support plates 501 and a pair of middle support plates 505. The two rotation-assisting mechanisms 51 are located at opposite ends of the pivot device 50, wherein the back side of one side support plate 501 is connected to the first fitting surface 5212 of the two first rotating members 521 on one side of the pivot device 50 and the third fitting surface 560 of the two first connecting seats 56, and the back side of the other side support plate 501 is connected to the second fitting surface 5312 of the two second rotating members 531 on the other side of the pivot device 50 and the fourth fitting surface 570 of the two second connecting seats 57; wherein one middle support plate 505 is connected to the two first connecting rod members 54 on one side of the pivot device 50, and the other middle support plate 505 is connected to the two second connecting rod members 55 on the other side of the pivot device 50.

[0073] Please also read Figure 8-Figure 13When assembling the rotation-assisting mechanism 51, install the first connecting frame 546 to the first rotating part 541, so that the first connecting bar 5463 faces the first connecting surface 5414, and the first supporting bar 5462 faces the first supporting surface 5412, and the two first rotation-assisting columns 5416 are respectively inserted into the two first rotation-assisting grooves 5460; install the second connecting frame 556 to the second rotating part 551, so that the second connecting bar 5563 faces the second connecting surface 5514, and the second supporting bar 5562 faces the second supporting surface 5512. The two connecting shafts 515 are respectively inserted into the first rotating hole 5410 of the first rotating part 541 and the second rotating hole 5510 of the second rotating part 551, and the ends of the two connecting shafts 515 on the same side are respectively inserted into the two connecting holes 5108 of the base 510, so that the two connecting shafts 515 can be rotatably accommodated in the first rotating opening 5466 and the second rotating opening 5566 respectively; the first arc rail 5210 of the first rotating member 521 is rotatably inserted into the first arc groove 5250 of the first connecting member 525, the second arc rail 5310 of the second rotating member 531 is rotatably inserted into the second arc groove 5350 of the first connecting member 535, the first rotating rail 5216 of the first rotating member 521 is rotatably inserted into the first rotating groove 5101 of the base 510, and the second rotating rail 5316 of the second rotating member 531 is rotatably inserted into the second Rotating groove 5103; the two first slide rails 5450 of the first sliding part 545 are slidably inserted into the two first slide grooves 5257 of the first connecting member 525, and the two second slide rails 5550 of the second sliding part 555 are slidably inserted into the two second slide grooves 5357 of the second connecting member 535; the first rotating rail 561 of the first connecting seat 56 is rotatably inserted into the first rotating groove 5258 of the first connecting member 525, the first adjusting part 564 is rollably accommodated in the first avoidance groove 5452, and the first adjusting rod 5453 is slidably inserted in the first adjusting groove 563; the second rotating rail 571 of the second connecting seat 57 is rotatably inserted into the second rotating groove 5358 of the second connecting member 535, the second adjusting part 574 is rollably accommodated in the second avoidance groove 5552, and the second adjusting rod 5553 is slidably inserted in the second adjusting groove 573.At this time, the first rotation-assisting groove 5460 is coaxial with the corresponding connecting shaft 515, the first rotating part 541 can rotate relative to the first connecting frame 546 around the axis of the corresponding connecting shaft 515, the first rotation-assisting column 5416 can slide along the first rotation-assisting groove 5460, and when the first rotation-assisting column 5416 pushes the end of the first rotation-assisting groove 5460, the first connecting frame 546 and the first rotating part 541 rotate together around the axis of the corresponding connecting shaft 515; the second rotation-assisting groove 5560 is coaxial with the corresponding connecting shaft 515, the second rotating part 551 can rotate relative to the second connecting frame 556 around the axis of the corresponding connecting shaft 515, the second rotation-assisting column 5516 can slide along the second rotation-assisting groove 5560, and when the second rotation-assisting column 5516 pushes the end of the second rotation-assisting groove 5560, the second connecting frame 556 and the second rotating part 551 rotate together around the axis of the corresponding connecting shaft 515.

[0074] When assembling the hinge device 50, the bases 510 of the three installed rotation-assisting mechanisms 51 are fixedly connected to the fixing grooves 5091 of the back cover 509 at intervals. Specifically, two of the rotation-assisting mechanisms 51 are respectively located at opposite ends of the back cover 509, and the other rotation-assisting mechanism 51 is located in the middle of the back cover 509; the connecting sheet bodies 507 of two middle support sheets 505 are respectively connected to the first connecting strips 5463 corresponding to one side of the back cover 509, so that the supporting sheet bodies 506 of the middle support sheets 505 face the first supporting strips 5462; the connecting sheet bodies 507 of the other two middle support sheets 505 are respectively connected to the second connecting strips 5563 corresponding to the other side of the back cover 509, so that the supporting sheet bodies 506 of the middle support sheets 505 face the second supporting strips 5562. The back side of one side support sheet 501 is connected to the first fitting surface 5212 of the first rotating member 521 and the third fitting surface 560 of the first connecting seat 56 on one side of the back cover 509, and the back side of the other side support sheet 501 is connected to the second fitting surface 5312 of the second rotating member 531 and the fourth fitting surface 570 of the second connecting seat 57 on the other side of the back cover 509. When the rotating shaft device 50 is in a flattened state, the first supporting surface 5412 is supported on the first supporting bar 5462, the first auxiliary rotating column 5416 is positioned at the first abutment top end 5460a, the second supporting surface 5512 is supported on the second supporting bar 5562, the second auxiliary rotating column 5516 is positioned at the third abutment top end 5560a, and the front sides of the supporting sheet body 506 of the middle supporting sheet 505 are coplanar; the first rotating mechanism 52 and the second rotating mechanism 53 are in a flattened state, the first connecting rod 54 and the second connecting rod 55 are in a flattened state, the first adjusting rod 5453 is positioned at the first positioning section 5632 of the first connecting seat 56, the second adjusting rod 5553 is positioned at the third positioning section 5732 of the second connecting seat 57, and the front sides of the two side supporting sheets 501 are coplanar. When the hinge device 50 is in a folded state, the first supporting surface 5412 is separated from the first supporting bar 5462, the first auxiliary rotating column 5416 is positioned at the second abutting top end 5460b, the second supporting surface 5512 is separated from the second supporting bar 5562, the second auxiliary rotating column 5516 is positioned at the fourth abutting top end 5560b, and the front of the supporting sheet body 506 of the middle supporting sheet 505 and the front of the base 501 form a teardrop-shaped space; the first rotating mechanism 52 and the second rotating mechanism 53 are in a folded state, the first connecting rod 54 and the second connecting rod 55 are in a folded state, the first adjusting rod 5453 is positioned at the second positioning section 5634 of the first connecting seat 56, the second adjusting rod 5553 is positioned at the fourth positioning section 5734 of the second connecting seat 57, and the front faces of the two side supporting sheets 501 are close and parallel.

[0075] Please also read Figure 4-Figure 9 and Figure 16-Figure 30When the rotating shaft device 50 is bent from the flattened state to the folded state, the first rotating mechanism 52 rotates toward the second rotating mechanism 53 relative to the base 510 along the corresponding second rotating axis L2, and the two first rotating rails 5216 of the first rotating member 521 rotate in the two first rotating grooves 5101 of the base 510 respectively, and the first circular arc rail 5210 of the first rotating member 521 rotates in the first circular arc groove 5250 of the first connecting member 525, and the first rotating member 521 rotates relative to the first connecting member 525 along the corresponding first rotating axis L1; the first connecting member 525 drives the first connecting rod member 54 to rotate toward the second connecting rod member 55 along the corresponding third rotating axis L3 relative to the base 510, and the two first sliding rails 5450 of the first connecting rod member 54 are respectively in the two first sliding grooves 525 of the connecting member 525. 57, at the same time, the first rotating rail 561 of the first connecting seat 56 rotates in the first rotating groove 5258, the first adjusting rod 5453 rolls from the first positioning section 5632 to the second positioning section 5634 in the first adjusting groove 563, and the first rotating part 541 rotates relative to the first connecting frame 546 around the axial center line of the corresponding connecting shaft 515, so that the first auxiliary rotation column 5416 slides from the first abutting top end 5460a to the second abutting top end 5460b in the first auxiliary rotation groove 5460, and the first auxiliary rotation column 5416 abuts against the second abutting top end 5460b, so that the first rotating part 541, the first connecting frame 546 and the corresponding middle support piece 505 rotate toward the second connecting rod member 55 together, and at the same time, one of the side support pieces 501 rotates relative to the base 510 with the first rotating member 521 and the first connecting seat 56.The second rotating mechanism 53 rotates along the corresponding second rotating axis L2 relative to the base 510 toward the first rotating mechanism 52, the two second rotating rails 5316 of the second rotating member 531 rotate in the two second rotating grooves 5103 of the base 510 respectively, the second circular arc rail 5310 of the second rotating member 531 rotates in the second circular arc groove 5350 of the second connecting member 535, and the second rotating member 531 rotates along the corresponding first rotating axis L1 relative to the second connecting member 535; the second connecting member 535 drives the second connecting rod member 55 to rotate along the corresponding third rotating axis L3 relative to the base 510 toward the first connecting rod member 54, the two second sliding rails 5550 of the second connecting rod member 55 slide in the two second sliding grooves 5357 of the second connecting member 535 respectively, and at the same time, the second The second rotating rail 571 of the connecting seat 57 rotates in the second rotating groove 5358, the second adjusting rod 5553 rolls from the third positioning section 5732 to the fourth positioning section 5734 in the second adjusting groove 573, and the second rotating part 551 rotates relative to the second connecting frame 556 around the axis of the corresponding connecting shaft 515, so that the second rotation-assisting column 5516 slides from the third abutting top 5560a to the fourth abutting top 5560b in the second rotation-assisting groove 5560, and the second rotation-assisting column 5516 abuts against the fourth abutting top 5560b, so that the second rotating part 551, the second connecting frame 556 and the corresponding middle supporting piece 505 rotate toward the first connecting rod 54 together, and at the same time, the other side supporting piece 501 rotates relative to the base 510 along with the second rotating piece 531 and the second connecting seat 57. Until the front of the two side supporting pieces 501, the front of the middle supporting piece 505 and the front of the base 501 form a teardrop-shaped space. One of the middle support pieces 505 is connected to the first rotating part 541 through the first connecting frame 546, and the first connecting frame 546 and the first rotating part 541 are connected through the first rotation-assisting groove 5460 and the first rotation-assisting column 5416, so that the first rotation-assisting column 5416 slides in the first rotation-assisting groove 5460 to the second positioning section 5634 before driving the first connecting frame 546 and the middle support piece 505 fixed on the first connecting frame 546 to rotate together; the other middle support piece 505 is connected to the second rotating part 551 through the second connecting frame 556, and The second connecting frame 556 and the second rotating part 551 are connected by the second auxiliary rotation shaft 5560 and the second auxiliary rotation column 5516, so that the second auxiliary rotation column 5516 slides in the second auxiliary rotation groove 5560 to the fourth positioning section 5734 before driving the second connecting frame 556 and the middle support plate 505 fixed on the second connecting frame 556 to rotate together; that is, the intermittent motion is used to adjust the rotation angle of the middle support plate 505 to avoid excessive bending of the middle support plate 505 due to a 90-degree rotation of the middle support plate 505.

[0076] When the rotating shaft device 50 is unfolded from the folded state to the flattened state, the first rotating mechanism 52 rotates along the corresponding second rotating axis L2 relative to the base 510 away from the second rotating mechanism 53, the two first rotating rails 5216 of the first rotating member 521 rotate in the two first rotating grooves 5101 of the base 510 respectively, the first circular arc rail 5210 of the first rotating member 521 rotates in the first circular arc groove 5250 of the first connecting member 525, and the first rotating member 521 rotates along the corresponding first rotating axis L1 relative to the first connecting member 525; the first connecting member 525 drives the first connecting rod member 54 to rotate along the corresponding third rotating axis L3 relative to the base 510 away from the second connecting rod member 55, and the two first sliding rails 5450 of the first connecting rod member 54 are respectively in the two first sliding grooves 5257 of the connecting member 525 At the same time, the first rotating rail 561 of the first connecting seat 56 rotates in the first rotating groove 5258, the first adjusting rod 5453 rolls from the second positioning section 5634 to the first positioning section 5632 in the first adjusting groove 563, and the first rotating part 541 rotates relative to the first connecting frame 546 around the axial center line of the corresponding connecting shaft 515, so that the first auxiliary rotation column 5416 slides from the second abutment top end 5460b to the first abutment top end 5460a in the first auxiliary rotation groove 5460, and the first auxiliary rotation column 5416 abuts against the first abutment top end 5460a, so that the first rotating part 541, the first connecting frame 546 and the corresponding middle support piece 505 rotate away from the second connecting rod member 55 together, and at the same time, one of the side support pieces 501 is unfolded as the first rotating member 521 and the first connecting seat 56 rotate relative to the base 510.The second rotating mechanism 53 is unfolded by rotating along the corresponding second rotating axis L2 relative to the base 510 away from the first rotating mechanism 52, the two second rotating rails 5316 of the second rotating member 531 rotate in the two second rotating grooves 5103 of the base 510 respectively, the second circular arc rail 5310 of the second rotating member 531 rotates in the second circular arc groove 5350 of the second connecting member 535, and the second rotating member 531 rotates along the corresponding first rotating axis L1 relative to the second connecting member 535 away from the first rotating member 521; the second connecting member 535 drives the second connecting rod member 55 to rotate along the corresponding third rotating axis L3 relative to the base 510 away from the first connecting rod member 54, and the two second sliding rails 5550 of the second connecting rod member 55 slide in the two second sliding grooves 5357 of the second connecting member 535 respectively. At the same time, the second rotating rail 571 of the second connecting seat 57 rotates in the second rotating groove 5358, the second adjusting rod 5553 rolls from the fourth positioning section 5734 to the third positioning section 5732 in the second adjusting groove 573, and the second rotating part 551 rotates relative to the second connecting frame 556 around the axis of the corresponding connecting shaft 515, so that the second rotation-assisting column 5516 slides from the fourth abutting top 5560b to the third abutting top 5560a in the second rotation-assisting groove 5560, and the second rotation-assisting column 5516 abuts against the third abutting top 5560a, so that the second rotating part 551, the second connecting frame 556 and the corresponding middle supporting piece 505 rotate away from the first connecting rod 54, and at the same time, the other side supporting piece 501 rotates relative to the base 510 along with the second rotating member 531 and the second connecting seat 57. Until the two side supporting pieces 501 and the middle supporting piece 505 are unfolded and in a horizontal state.

[0077] Please also read Figure 1-Figure 3, place the installed hinge device 50 between the two frames 40, and fix the two opposite sides of the hinge device 50 to the two frames 40 respectively. Specifically, the first rotating mechanism 52 on one side of the base 510 is accommodated in the mounting groove 406 of one of the frames 40, and the first connecting member 525 of the first rotating mechanism 52 is connected to the frame 40; the second rotating mechanism 53 on the other side of the base 510 is accommodated in the mounting groove 406 of the other frame 40, and the second connecting member 535 of the second rotating mechanism 53 is connected to the frame 40. At this time, the front faces 402 of the two frames 40, the front faces of the side support sheets 501, and the front faces of the middle support sheets 505 are coplanar. The back of the flexible screen 30 is connected to the front 402 of the two frames 40 and the front of the hinge device 50; specifically, the bendable area 31 is connected to the front of the side support sheet 501 and the front of the middle support sheet 505 of the hinge device 50, and the two non-bending areas 33 are respectively connected to the front 402 of the two frames 40. Since the ultra-thin side support sheet 501 and the middle support sheet 505 are used to replace the supporting mechanism and the supporting back in the prior art, the overall thickness of the hinge device 50 is reduced, and the overall thickness of the electronic device 100 is reduced, which is conducive to the thinning development of the electronic device 100.

[0078] Please also read Figure 1-Figure 5 and Figure 16-Figure 30 When the electronic device 100 is bent, a bending force is applied to at least one of the two frames 40 of the electronic device 100, so that the first connecting member 525 and the second connecting member 535 connected to the two frames 40 respectively drive the first rotating member 521 and the second rotating member 256 to rotate synchronously relative to the base 510 and rotate in a direction close to each other, wherein one side support sheet 501 rotates with the first rotating member 521 and the first connecting seat 56 toward the other side support sheet 501, and the rotation of the first connecting rod 54 drives the corresponding middle support sheet 505 to rotate; the other side support The sheet 501 rotates with the second rotating member 531 and the second connecting seat 57 toward the first rotating member 521, and the rotation of the second connecting rod 55 drives the corresponding middle supporting sheet 505 to rotate until the two side supporting sheets 501 and the middle supporting sheet 505 form a teardrop-shaped space to achieve the folding of the hinge device 50, and the bendable area 31 of the flexible screen 30 bends with the hinge device 50 until the bendable area 31 bends into a teardrop shape, so that the support sheet body 506 of the middle supporting sheet 505 is bent to support the bendable area 31, thereby achieving the folding of the electronic device 100. In the process of bending the electronic device 100, the middle supporting sheet 505 changes from a flat state to a bent state, so that the middle supporting sheet 505 has a resilient force.

[0079] When the electronic device 100 is flattened, an unfolding force is applied to at least one of the two frames 40 of the electronic device 100, so that the first connecting member 525 and the second connecting member 535 connected to the two frames 40 drive the first rotating member 521 and the second rotating member 256 to rotate in the opposite direction relative to the base 510 and rotate in a direction away from each other, and the side of the side support piece 501 away from the middle support piece 505 rotates relative to the first connecting member 525, wherein the side support piece 501 rotates with the first rotating member 521 and the first connecting seat 56 away from the other side support piece 501, and the first connecting rod member 54 The rotation of the second connecting rod 55 drives the corresponding middle supporting piece 505 to rotate; the other side supporting piece 501 rotates away from the first rotating piece 521 along with the second rotating piece 531 and the second connecting seat 57, and the rotation of the second connecting rod 55 drives the corresponding middle supporting piece 505 to rotate until the two side supporting pieces 501 and the middle supporting piece 505 are flattened to realize the unfolding of the hinge device 50, and the bendable area 31 of the flexible screen 30 is unfolded along with the hinge device 50 until the flexible screen 30 is completely flattened, and the middle supporting piece 505 and the side supporting piece 501 both support the bendable area 31, thereby realizing the flattening of the electronic device 100. In the process of flattening the electronic device 100, the middle supporting piece 505 changes from a bent state to a flattened state, so the middle supporting piece 505 has a rebound force, which is more conducive to the unfolding of the electronic device 100.

[0080] The middle support piece 505 of the hinge device 50 of the electronic device 100 of the present invention is directly connected to the first connection surface 5414 of the first connecting rod 54 and the second connection surface 5514 of the second connecting rod 55. The middle support piece 505 on the first connecting rod 54 can rotate with the first connecting rod 54, and the middle support piece 505 on the second connecting rod 55 can rotate with the second connecting rod 55. One side support piece 501 is directly connected to the first rotating member 521 and the first connecting seat 56, and the side support piece 501 can rotate with the first rotating member 521. The other side support piece 501 is directly connected to the first rotating member 521. The second rotating member 531 and the second connecting seat 57 rotate, thereby driving the bendable area 31 of the flexible screen 30 to bend or unfold; since the thickness of the middle support sheet 505 and the side support sheet 501 is thin, the overall thickness of the hinge device 50 is thinned, and the overall thickness of the electronic device 100 is reduced, which is beneficial to the development of the electronic device 100 to be lighter and thinner; in addition, the side support sheet 501 and the middle support sheet 505 have a simple structure, and the connection relationship between the side support sheet 501 and the middle support sheet 505 and the auxiliary rotation mechanism 51 is simple, which is beneficial to the manufacturing and assembly time, reduces costs, and improves manufacturing efficiency.

[0081] The above is an implementation of the embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the embodiment of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A rotating shaft device, characterized in that: The rotating shaft device comprises: Pedestal; A first rotating mechanism comprises a first rotating member and a first connecting member, wherein the first rotating member is rotatably connected to the first connecting member, and an end of the first rotating member away from the first connecting member is rotatably connected to one side of the base; A second rotating mechanism comprises a second rotating member and a second connecting member, wherein the second rotating member is rotatably connected to the second connecting member, and an end of the second rotating member away from the second connecting member is rotatably connected to the other side opposite to the base; a first connecting rod, wherein one side of the first connecting rod is rotatably connected to one side of the base, and the side of the first connecting rod away from the base is slidably connected to the first connecting member; a second connecting rod, one side of the second connecting rod being rotatably connected to one side of the base, and a side of the second connecting rod being away from the base being slidably connected to the second connecting member; and A pair of middle support plates, one of which is connected to the side of the first connecting rod member close to the base and can rotate relative to the base with the first connecting rod member, and the other middle support plate is connected to the side of the second connecting rod member close to the base and can rotate relative to the base with the second connecting rod member.

2. The rotating shaft device according to claim 1, characterized in that: It also includes a pair of side support plates, which are located on opposite sides of the base, wherein one side support plate is connected to the front side of the first rotating member and can rotate relative to the base with the first rotating member, and the other side support plate is connected to the front side of the second rotating member and can rotate relative to the base with the second rotating member.

3. The rotating shaft device according to claim 2, characterized in that: It also includes a first connecting seat and a second connecting seat, the first connecting seat is rotatably connected to the first connecting member, and the side of the first connecting rod away from the base is movably connected to the first connecting seat, wherein one of the side support plates is connected to the front side of the first connecting seat; the second connecting seat is rotatably connected to the second connecting member, and the side of the second connecting rod away from the base is movably connected to the second connecting seat, and the other side support plate is connected to the front side of the second connecting seat.

4. The rotating shaft device according to claim 3, characterized in that: The first rotating member and the first connecting member are rotatably connected through the cooperation of the first circular arc rail and the first circular arc groove, the first connecting seat and the first connecting member are rotatably connected through the cooperation of the first rotating rail and the first rotating groove, and the axis line of the first circular arc groove is parallel to the axis line of the first rotating groove; the second rotating member and the second connecting member are rotatably connected through the cooperation of the second circular arc rail and the second circular arc groove, the second connecting seat and the second connecting member are rotatably connected through the cooperation of the second rotating rail and the second rotating groove, and the axis line of the second circular arc groove is parallel to the axis line of the second rotating groove.

5. The rotating shaft device according to claim 3, characterized in that: The first connecting seat and the first connecting rod are connected by the cooperation of the first adjustment groove and the first adjustment rod, the first adjustment groove has a first positioning section and a second positioning section located at opposite ends thereof, and the first positioning section is farther away from the base than the second positioning section; the second connecting seat and the second connecting rod are connected by the cooperation of the second adjustment groove and the second adjustment rod, the second adjustment groove has a third positioning section and a fourth positioning section located at opposite ends thereof, and the third positioning section is farther away from the base than the fourth positioning section; when the pair of side support sheets and the pair of middle support sheets are in a flattened state, the first adjustment rod is positioned at the first positioning section, and the second adjustment rod is positioned at the third positioning section; when the pair of side support sheets and the pair of middle support sheets are in a folded state, the first adjustment rod is positioned at the second positioning section, and the second adjustment rod is positioned at the fourth positioning section.

6. The rotating shaft device according to claim 5, characterized in that: The first connecting seat includes a first adapter portion, a first adjustment portion and a first connecting portion connected to the first adapter portion and the first adjustment portion, the first rotating rail is provided on the first adapter portion, the first rotating groove is provided on the first connecting member, the first adjustment groove is provided on the first adjustment portion, and the first adjusting rod is provided on the first connecting rod; the second connecting seat includes a second adapter portion, a second adjustment portion and a second connecting portion connected to the second adapter portion and the second adjustment portion, the second rotating rail is provided on the second adapter portion, the second rotating groove is provided on the second connecting member, the second adjustment groove is provided on the second adjustment portion, and the second adjusting rod is provided on the second connecting rod.

7. The rotating shaft device according to claim 6, characterized in that: The first connecting rod member includes a first sliding portion, and the first sliding portion and the first connecting member are slidably connected by a first slide rail and a first slide groove, the length direction of the first slide rail is perpendicular to the rotation axis between the first connecting rod member and the base, the first sliding portion is provided with a first avoidance groove, and the first adjustment portion can be rollingly accommodated in the first avoidance groove; the second connecting rod member includes a second sliding portion, and the second sliding portion and the second connecting member are slidably connected by a second slide rail and a second slide groove, the length direction of the second slide rail is perpendicular to the rotation axis between the second connecting rod member and the base, the second sliding portion is provided with a second avoidance groove, and the second adjustment portion can be rollingly accommodated in the second avoidance groove.

8. The rotating shaft device according to claim 2, characterized in that: It also includes a pair of connecting shafts, a first connecting frame and a second connecting frame, the pair of connecting shafts are respectively connected to opposite sides of the base, the first connecting rod includes a first rotating portion, the first rotating portion is connected to one of the connecting shafts, the second connecting rod includes a second rotating portion, the second rotating portion is connected to the other connecting shaft, the first connecting frame is rotatably sleeved on one of the connecting shafts, and the first connecting frame is connected to the first rotating portion, the second connecting frame is rotatably sleeved on the other connecting shaft, and the second connecting frame is connected to the second rotating portion.

9. The rotating shaft device according to claim 8, characterized in that: One of the middle support plates is connected to the first connecting frame, and the other middle support plate is connected to the second connecting frame. The first connecting rod can rotate around the axis line of the corresponding connecting shaft to drive the first connecting frame and the corresponding middle support plate to rotate together. The second connecting rod can rotate around the axis line of the corresponding connecting shaft to drive the second connecting frame and the corresponding middle support plate to rotate together.

10. The rotating shaft device according to claim 8, characterized in that: The first connecting frame and the first rotating part are connected by a first rotation-assisting groove and a first rotation-assisting column, the first rotation-assisting groove is a first arc groove and has a coaxial center line with the corresponding connecting shaft, and the first rotation-assisting column can slide along the first rotation-assisting groove; The second connecting frame and the second rotating part are connected through the cooperation of a second rotation-assisting groove and a second rotation-assisting column. The second rotation-assisting groove is a second arc groove and has a coaxial centerline with the corresponding connecting shaft. The second rotation-assisting column can slide along the second rotation-assisting groove.

11. The rotating shaft device according to claim 10, characterized in that: The first rotation-assisting groove includes a first abutting top and a second abutting top located at opposite ends thereof, and the first abutting top is farther away from the base than the second abutting top; the second rotation-assisting groove includes a third abutting top and a fourth abutting top located at opposite ends thereof, and the third abutting top is farther away from the base than the fourth abutting top; when the pair of the side support sheets and the middle support sheet are in a flattened state, the first rotation-assisting column abuts against the first abutting top, and the second rotation-assisting column abuts against the third abutting top; when the pair of the side support sheets and the middle support sheet are in a folded state, the first rotation-assisting column abuts against the second abutting top, and the second rotation-assisting column abuts against the fourth abutting top.

12. The rotating shaft device according to claim 11, characterized in that: When the rotating shaft device is bent from a flattened state to a folded state, the first rotating part rotates relative to the first connecting frame around the axis line of the corresponding connecting shaft, so that the first auxiliary rotation column slides from the first abutment top end to the second abutment top end in the first auxiliary rotation groove, and the first auxiliary rotation column abuts against the second abutment top end, so that the first rotating part, the first connecting frame and the corresponding middle support piece rotate together; the second rotating part rotates relative to the second connecting frame around the axis line of the corresponding connecting shaft, so that the second auxiliary rotation column slides from the third abutment top end to the fourth abutment top end in the second auxiliary rotation groove, and the second auxiliary rotation column abuts against the fourth abutment top end, so that the second rotating part, the second connecting frame and the corresponding middle support piece rotate together.

13. The rotating shaft device according to claim 10, characterized in that: The first connecting frame includes a first supporting portion and two first rotating pieces connected to opposite ends of the first supporting portion, the two first rotating pieces are respectively fitted to opposite end surfaces of the first rotating portion, the first rotation-assisting groove is provided on the first rotating piece, the first rotation-assisting column is provided on the end surface of the first rotating portion, and the end of the first rotating piece away from the first supporting portion is rotatably sleeved on the corresponding connecting shaft; the second connecting frame includes a second supporting portion and two second rotating pieces connected to opposite ends of the second supporting portion, the two second rotating pieces are respectively fitted to opposite end surfaces of the second rotating portion, the second rotation-assisting groove is provided on the second rotating piece, the second rotation-assisting column is provided on the end surface of the second rotating portion, and the end of the second rotating piece away from the second supporting portion is rotatably sleeved on the corresponding connecting shaft.

14. The rotating shaft device according to claim 13, characterized in that: A first rotating opening is provided at one end of the first rotating piece away from the first supporting part, the first rotating opening can be rotatably mounted on the corresponding connecting shaft, and the first auxiliary rotating groove is located between the first supporting part and the first rotating opening; a second rotating piece is provided at one end of the second rotating piece away from the second supporting part, the second rotating opening can be rotatably mounted on the corresponding connecting shaft, and the second auxiliary rotating groove is located between the second supporting part and the second rotating opening.

15. The rotating shaft device according to claim 13, characterized in that: The first support portion includes a first support bar and a first connecting bar connected to one side of the first support bar, and the first connecting bar is inclined relative to the first support bar; the second support portion includes a second support bar and a second connecting bar connected to one side of the second support bar, and the second connecting bar is inclined relative to the second support bar; the middle support sheet includes a bar-shaped support sheet body and a connecting sheet body connected to one side of the support sheet body, wherein the connecting sheet body of one of the middle support sheets is connected to the first connecting bar, and the connecting sheet body of the other middle support sheet is connected to the second connecting bar; when the rotating shaft device is in a flattened state, the first support bar and the second support bar are respectively supported by the corresponding support sheet bodies.

16. The rotating shaft device according to claim 15, characterized in that: The outer circumference of the first rotating part is provided with a first supporting surface, and the outer circumference of the second rotating part is provided with a second supporting surface; when the rotating shaft device is in a flattened state, the first supporting surface supports the first connecting strip, and the second supporting surface supports the second connecting strip.

17. The rotating shaft device according to claim 15, characterized in that: The support sheet body can be bent, and the bending axis of the support sheet body is parallel to the axis of the connecting shaft. When the rotating shaft device is in a folded state, the support sheet body is in a bent state. The two support sheets and a pair of side support sheets form an arc-shaped receiving space, and the support sheet body has an elastic restoring force.

18. A foldable housing, characterized in that: The folding shell includes the hinge device according to any one of claims 1 to 17 and two frames, and the opposite sides of the hinge device are respectively connected to the two frames.

19. An electronic device, characterized in that: The electronic device includes a flexible screen, two frames and a hinge device as described in any one of claims 1 to 17, wherein opposite sides of the hinge device are respectively connected to the two frames, and the flexible screen is connected to the two frames and the hinge device.

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