Hinge device and foldable display device

Abstract

A hinge device includes a rotating part and a synchronously moving part. The rotating part includes a guide slot seat, a first support plate, a second support plate, a first connecting plate, and a second connecting plate. The first and second support plates are rotatably engaged with two non-circular arc guide slots provided on the guide slot seat through their non-circular arc rotating parts, and the first and second connecting plates are rotatably engaged with two circular arc guide slots provided on the guide slot seat through their circular arc rotating parts. The first and second connecting plates are slidably connected to the first and second support plates, respectively. The synchronously moving part includes a first connecting rod, a second connecting rod, a fixed seat, a first rotating shaft, a second rotating shaft, and a transmission device. The first connecting rod is fixed to the first rotating shaft and slidably connected to the first connecting plate, the second connecting rod is fixed to the second rotating shaft and slidably connected to the second connecting plate, and the transmission device is configured to make the first and second rotating shafts rotate synchronously.

Description

Technical Field

[0001] This disclosure relates to, but is not limited to, the field of display technology, specifically to a hinge device and a foldable display device. Background Technology

[0002] Some U-shaped foldable display products will develop creases of varying degrees on the screen after repeated bending, affecting the display effect. Summary of the Invention

[0003] The following is an overview of the subject matter described in detail herein. This overview is not intended to limit the scope of the claims.

[0004] This disclosure provides a hinge device, including a rotating part and a moving part;

[0005] The rotating part includes a guide slot seat, a first support plate, a second support plate, a first connecting plate, and a second connecting plate; the guide slot seat is provided with a first non-circular arc guide slot, a second non-circular arc guide slot, a first circular arc guide slot, and a second circular arc guide slot; the first support plate is provided with a first non-circular arc rotating part that rotatably engages with the first non-circular arc guide slot, the second support plate is provided with a second non-circular arc rotating part that rotatably engages with the second non-circular arc guide slot, the first connecting plate is provided with a first circular arc rotating part that rotatably engages with the first circular arc guide slot, and the second connecting plate is provided with a second circular arc rotating part that rotatably engages with the second circular arc guide slot; the first connecting plate is slidably connected to the first support plate, and the second connecting plate is slidably connected to the second support plate;

[0006] The synchronously moving part includes a first connecting rod, a second connecting rod, a fixed base, a first rotating shaft and a second rotating shaft rotatably disposed within the fixed base and arranged in parallel, and a transmission device; the first connecting rod is fixedly connected to the first rotating shaft and slidably connected to the first connecting plate, the second connecting rod is fixedly connected to the second rotating shaft and slidably connected to the second connecting plate, and the transmission device is configured to make the first rotating shaft and the second rotating shaft rotate synchronously.

[0007] This disclosure also provides a foldable display device, including a flexible display module and a mid-frame assembly. The mid-frame assembly includes a first plate, a second plate, and the hinge device. The first plate is fixedly connected to a first support plate, and the second plate is fixedly connected to a second support plate. The side of the flexible display module opposite to the display side is fixed to the first plate and the second plate.

[0008] This disclosure also provides a foldable display device, including a flexible display module and the hinge device, wherein the side of the flexible display module opposite to the display side is fixed to the first support plate and the second support plate.

[0009] After reading and understanding the accompanying diagrams and detailed descriptions, other aspects can be understood. Attached Figure Description

[0010] The accompanying drawings are provided to further understand the technical solutions of this disclosure and constitute a part of the specification. They are used together with the embodiments of this disclosure to explain the technical solutions of this disclosure and do not constitute a limitation on the technical solutions of this disclosure.

[0011] Figure 1a A schematic diagram of the hinge device in a flattened state, illustrating some exemplary embodiments;

[0012] Figure 1b for Figure 1a A schematic diagram of the hinge device from another perspective;

[0013] Figure 2 for Figure 1a A schematic diagram of the hinge device in the folded state;

[0014] Figure 3a for Figure 1a A schematic diagram of the hinge device under a localized explosion condition;

[0015] Figure 3b for Figure 1a A schematic diagram of the hinge device after the first support is removed;

[0016] Figure 4 for Figure 1a An exploded structural diagram of the guide slot seat of the hinge device;

[0017] Figure 5 In some exemplary embodiments Figure 1a A schematic diagram of the planar structure of the hinge device after removing the base of the fixed seat in one of the moving parts;

[0018] Figure 6a In some exemplary embodiments Figure 1a A schematic diagram of the partial explosion structure of the moving part of the hinge device;

[0019] Figure 6b for Figure 6a A schematic diagram of the local explosion structure of the co-moving part from another perspective;

[0020] Figure 7 for Figure 5 A partial structural diagram of the hinge device;

[0021] Figure 8 for Figure 7 A schematic diagram of the structure of the first or second friction component;

[0022] Figure 9 for Figure 7 A structural diagram of the first and second fixing frames, which are connected as a single unit;

[0023] Figure 10 for Figure 7 A structural schematic diagram of the second or fourth fastener;

[0024] Figure 11 for Figure 7 Schematic diagram of the structure of the friction plate;

[0025] Figure 12 for Figure 7 A schematic diagram of the structure of the first or second rotating shaft in the process;

[0026] Figure 13a This is a schematic diagram of the mid-frame assembly of a foldable display device in a folded state, as shown in some exemplary embodiments.

[0027] Figure 13b for Figure 13a A schematic diagram of the mid-frame component in its flattened state;

[0028] Figure 14 This is a schematic diagram of the structure of a foldable display device in a folded state, which is an exemplary embodiment of the invention. Detailed Implementation

[0029] Those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the embodiments of this disclosure without departing from the spirit and scope of the technical solutions of the embodiments of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

[0030] This disclosure provides a hinge device, including a rotating part and a moving part;

[0031] The rotating part includes a guide slot seat, a first support plate, a second support plate, a first connecting plate, and a second connecting plate; the guide slot seat is provided with a first non-circular arc guide slot, a second non-circular arc guide slot, a first circular arc guide slot, and a second circular arc guide slot; the first support plate is provided with a first non-circular arc rotating part that rotatably engages with the first non-circular arc guide slot, the second support plate is provided with a second non-circular arc rotating part that rotatably engages with the second non-circular arc guide slot, the first connecting plate is provided with a first circular arc rotating part that rotatably engages with the first circular arc guide slot, and the second connecting plate is provided with a second circular arc rotating part that rotatably engages with the second circular arc guide slot; the first connecting plate is slidably connected to the first support plate, and the second connecting plate is slidably connected to the second support plate;

[0032] The synchronously moving part includes a first connecting rod, a second connecting rod, a fixed base, a first rotating shaft and a second rotating shaft rotatably disposed within the fixed base and arranged in parallel, and a transmission device; the first connecting rod is fixedly connected to the first rotating shaft and slidably connected to the first connecting plate, the second connecting rod is fixedly connected to the second rotating shaft and slidably connected to the second connecting plate, and the transmission device is configured to make the first rotating shaft and the second rotating shaft rotate synchronously.

[0033] In the hinge device of this embodiment, the rotation of the first support plate and the second support plate can respectively drive the rotation of the first connecting plate and the second connecting plate, which in turn drives the rotation of the first rotating shaft and the second rotating shaft via the first connecting rod and the second connecting rod, respectively. The first rotating shaft and the second rotating shaft are kept rotating synchronously through a transmission device, ultimately achieving synchronous rotation of the first support plate and the second support plate. Furthermore, since both the first support plate and the second support plate are in rotational engagement with the non-circular arc guide groove of the guide groove seat through a non-circular arc rotating part, the rotational trajectories of the first support plate and the second support plate are both non-circular arc trajectories. When the hinge device of this embodiment is applied to a foldable display device (which may be a U-shaped inward foldable display device), the display screen can be bent by rotating the first support plate and the second support plate to achieve the switching between the flattened state and the folded state of the foldable display device. Since the rotation trajectory of the first support plate and the second support plate is a non-circular arc trajectory, the bending trajectory of the display screen is also a non-circular arc trajectory. Compared with the bending trajectory of the display screen being a circular arc trajectory, the stretching of the display screen can be compensated in real time during the bending process. The screen will not be pulled or squeezed during the bending process, which can reduce the stress in the bending area of ​​the display screen (in some examples, it can be reduced from 2.7‰ to 0.5‰) to reduce damage to the screen film layer, thereby improving the crease problem of the display screen.

[0034] In some exemplary embodiments, there are two of each of the first and second connecting plates, and two of each of the co-moving portions; a first connecting rod of one of the two co-moving portions is connected to one of the two first connecting plates, and a first connecting rod of the other of the two co-moving portions is connected to the other of the two first connecting plates; a second connecting rod of one of the two co-moving portions is connected to one of the two second connecting plates, and a second connecting rod of the other of the two co-moving portions is connected to the other of the two second connecting plates; the first support plate and the second support plate are symmetrically arranged on both sides of the guide slot seat along a first direction, and the two co-moving portions are symmetrically arranged on both sides of the guide slot seat along a second direction, wherein the first direction and the second direction are perpendicular to each other.

[0035] In one example of this embodiment, two first connecting plates and two second connecting plates are symmetrically arranged on both sides of the guide slot seat along the second direction, and the first connecting plates and second connecting plates connected to the same moving part are symmetrically arranged on both sides of the guide slot seat along the first direction.

[0036] In one example of this embodiment, the guide slot seat is symmetrically arranged about a first axis of symmetry and about a second axis of symmetry, the first axis of symmetry being parallel to the first direction and the second axis of symmetry being parallel to the second direction.

[0037] For example, the guide slot seat includes two sub-guide slot seats, which are symmetrically arranged about the second axis of symmetry, and each sub-guide slot seat is symmetrically arranged about the first axis of symmetry; each sub-guide slot seat is divided into two parts by the first axis of symmetry, and each of the two parts is provided with a non-circular arc guide slot and a circular arc guide slot;

[0038] The first support plate is provided with two first non-circular arc rotating parts, and the two first non-circular arc rotating parts are respectively rotatably engaged with two non-circular arc guide grooves located on one side of the first axis of symmetry; the second support plate is provided with two second non-circular arc rotating parts, and the two second non-circular arc rotating parts are respectively rotatably engaged with two non-circular arc guide grooves located on the other side of the first axis of symmetry.

[0039] Each of the two first connecting plates is provided with a first arc rotating part, and the two first arc rotating parts are respectively rotatably engaged with two arc guide grooves located on one side of the first axis of symmetry; each of the two second connecting plates is provided with a second arc rotating part, and the two second arc rotating parts are respectively rotatably engaged with two arc guide grooves located on the other side of the first axis of symmetry.

[0040] For example, the hinge device is symmetrically arranged about the first axis of symmetry and about the second axis of symmetry.

[0041] In some exemplary embodiments, such as Figure 1a , Figure 1b and Figure 2 As shown, Figure 1a This is a schematic diagram of the hinge device in a flattened state, illustrating some exemplary embodiments. Figure 1b for Figure 1a A schematic diagram of the hinge mechanism from another perspective. Figure 2 for Figure 1a The schematic diagram shows the structure of the hinge device in its folded state. The hinge device includes a rotating part and a moving part 200. The rotating part includes a guide slot seat 10, a first support plate 11, a second support plate 12, a first connecting plate 13, and a second connecting plate.

[0042] like Figure 3a , Figure 3b and Figure 4 As shown, Figure 3a for Figure 1a A schematic diagram of the hinge device under a localized explosion condition. Figure 3b for Figure 1a A schematic diagram of the hinge device after removing the first support. Figure 4 for Figure 1aAn exploded structural diagram of the guide slot seat of the hinge device is shown. The guide slot seat 10 includes two sub-guide slot seats, namely a first sub-guide slot seat 1011 and a second sub-guide slot seat 1012. The two sub-guide slot seats are symmetrically arranged about the second axis of symmetry L2, and each sub-guide slot seat is symmetrically arranged about the first axis of symmetry L1. Each sub-guide slot seat is divided into two parts by the first axis of symmetry L1. Each of the two parts is provided with a non-circular arc guide slot and a circular arc guide slot. Specifically, each sub-guide slot seat is provided with a first non-circular arc guide slot 101, a second non-circular arc guide slot 102, a first circular arc guide slot 103, and a second circular arc guide slot 104. In each sub-guide slot seat, the first non-circular arc guide slot 101 and the first circular arc guide slot 103 are located on one side of the first axis of symmetry L1, and the second non-circular arc guide slot 102 and the second circular arc guide slot 104 are located on the other side of the first axis of symmetry L1. Each of the sub-guide slot seats has a first non-circular arc guide slot 101, a second non-circular arc guide slot 102, and a boss located between the first non-circular arc guide slot 101 and the second non-circular arc guide slot 102 on its surface facing the other sub-guide slot seat; the bosses of the two sub-guide slot seats are arranged opposite to each other and form two receiving spaces between the two sub-guide slot seats to respectively receive the first protruding portion 112 of the first support plate 11 (with two first non-circular arc rotating portions 111) and the second protruding portion 122 of the second support plate 12 (with two second non-circular arc rotating portions); each of the sub-guide slot seats has a first circular arc guide slot 103 and a second circular arc guide slot 104 on its surface away from the other sub-guide slot seat, wherein the first non-circular arc guide slot 101 and the second non-circular arc guide slot 102 are respectively located on both sides of the first axis of symmetry L1, and the first circular arc guide slot 103 and the second circular arc guide slot 104 are respectively located on both sides of the first axis of symmetry L1. For example, the first non-circular arc guide groove 101 and the second non-circular arc guide groove 102 can be guide grooves with involute trajectories.

[0043] The first support plate 11 and the second support plate 12 are symmetrically arranged on both sides of the guide slot seat 10 along a first direction (exemplarily, the first direction is the direction of the first axis of symmetry L1 of the guide slot seat 10). One side of the first support plate 11 has a first protrusion 112, and two first non-circular arc rotating portions 111 are provided on both sides of the first protrusion 112. The first protrusion 112 is located in a receiving space between the two sub-guide slot seats, and the two first non-circular arc rotating portions 111 are rotatably engaged with the two first non-circular arc guide slots 101 of the two sub-guide slot seats, respectively. One side of the second support plate 12 has a second protrusion 122, and two second non-circular arc rotating portions are provided on both sides of the second protrusion 122. The second protrusion 122 is located in another receiving space between the two sub-guide slot seats, and the two second non-circular arc rotating portions are rotatably engaged with the two second non-circular arc guide slots 102 of the two sub-guide slot seats, respectively. The first support plate 11 may have at least one first mounting hole 113 at its end or near the edge, and the second support plate 12 may have at least one second mounting hole 123 at its end or near the edge. In practical applications, the first support plate 11 and the second support plate 12 can be fixedly mounted on other devices (such as the mid-frame assembly of a foldable display device) through the first mounting hole 113 and the second mounting hole 123, respectively.

[0044] Two first connecting plates 13 are located on one side of the first axis of symmetry L1 of the guide slot seat 10, and on opposite sides of the two sub-guide slot seats, and are symmetrically arranged about the second axis of symmetry L2 of the guide slot seat 10. The first arc rotating part 131 of each first connecting plate 13 is rotatably engaged with the first arc guide groove 103 of the corresponding sub-guide slot seat. Each first connecting plate 13 is also partially located on the first surface of the first support plate 11 and is slidably connected to the first support plate 11. Two second connecting plates are located on the other side of the first axis of symmetry L1 of the guide slot seat 10, and on opposite sides of the two sub-guide slot seats, and are symmetrically arranged about the second axis of symmetry L2 of the guide slot seat 10. The second arc rotating part of each second connecting plate is rotatably engaged with the second arc guide groove 104 of the corresponding sub-guide slot seat. Each second connecting plate is also partially located on the first surface of the second support plate 12 and is slidably connected to the second support plate 12. Furthermore, the first connecting plate 13 and the second connecting plate, which are connected to the same moving part 200, are symmetrically arranged about the first axis of symmetry L1 of the guide slot seat 10.

[0045] like Figure 1a , Figure 1b , Figure 3a and Figure 3bAs shown, the two co-moving parts 200 are symmetrically arranged on both sides of the guide slot seat 10 along the second direction (exemplarily, the second direction is the second axis of symmetry L2 of the guide slot seat 10). The first direction and the second direction are perpendicular to each other, that is, the two co-moving parts 200 are respectively located on opposite sides of the two sub-guide slot seats and are symmetrically arranged. The co-moving part 200 includes a first connecting rod 23, a second connecting rod 24, a fixed seat 20, a first rotating shaft 21 and a second rotating shaft 22 rotatably disposed in the fixed seat 20 and arranged in parallel, and a transmission device; the first connecting rod 23 is fixed to the first rotating shaft 21 and slidably connected to the first connecting plate 13, the second connecting rod 24 is fixed to the second rotating shaft 22 and slidably connected to the second connecting plate, and the transmission device is configured to make the first rotating shaft 21 and the second rotating shaft 22 rotate synchronously. In this configuration, the first connecting rod 23 of one of the two moving parts 200 is connected to one of the two first connecting plates 13, and the first connecting rod 23 of the other moving part 200 is connected to the other of the two first connecting plates 13; similarly, the second connecting rod 24 of one of the two moving parts 200 is connected to one of the two second connecting plates, and the second connecting rod 24 of the other moving part 200 is connected to the other of the two second connecting plates. In this example, the symmetrical arrangement of the two moving parts 200 allows for smoother and more stable rotation of the first support plate 11 and the second support plate 12.

[0046] In this example, as Figure 1a and Figure 1b As shown, the hinge device can be symmetrically arranged about the first axis of symmetry L1 and about the second axis of symmetry L2.

[0047] In some exemplary embodiments, such as Figure 1a , Figure 1b , Figure 3a and Figure 3b As shown, the rotating part may further include a first fixing plate 15 and a second fixing plate 16; the first fixing plate 15 is fixed to the first support plate 11 by a first fastener 17, and the first connecting plate 13 is clamped between the first fixing plate 15 and the first support plate 11. The first connecting plate 13 is provided with a first sliding hole 132, and the first fastener 17 passes through the first sliding hole 132 and can slide along the first sliding hole 132; the second fixing plate 16 is fixed to the second support plate 12 by a second fastener 18, and the second connecting plate is clamped between the second fixing plate 16 and the second support plate 12. The second connecting plate is provided with a second sliding hole, and the second fastener 18 passes through the second sliding hole and can slide along the second sliding hole.

[0048] For example, the portion of the first connecting plate 13 located on the first surface of the first support plate 11 is clamped between the first fixing plate 15 and the first support plate 11. The first sliding hole 132 can be an elongated through hole with its length direction parallel to the second direction. During the rotation of the first connecting plate 13 driven by the first support plate 11, the first fastener 17 can slide within the first sliding hole 132 to achieve the sliding of the first connecting plate 13 relative to the first support plate 11. The first fastener 17 can be a screw, and can be one, two, or more (two are shown in this example). Both the first fixing plate 15 and the first support plate 11 are provided with fixing holes for the first fastener 17 to pass through. Similarly, the portion of the second connecting plate located on the first surface of the second support plate 12 is clamped between the second fixing plate 16 and the second support plate 12. The second sliding hole can be an elongated through hole with its length direction parallel to the second direction. During the rotation of the second connecting plate driven by the second support plate 12, the second fastener 18 can slide within the second sliding hole to achieve the sliding of the second connecting plate relative to the second support plate 12. The second fastener 18 can be a screw, and can be set to one, two or more (two are shown in this example). The second fixing plate 16 and the second support plate 12 are both provided with fixing holes for the first fastener 17 to pass through.

[0049] In some exemplary embodiments, such as Figure 3a As shown, the first arc-shaped rotating part 131 rotates around a first rotation center line, and the second arc-shaped rotating part rotates around a second rotation center line. Both the first and second rotation center lines are parallel to the axial directions of the first rotating shaft 21 and the second rotating shaft 22. The axial directions of the first rotating shaft 21 and the second rotating shaft 22 are parallel to the first direction.

[0050] In some exemplary embodiments, such as Figure 5 , Figure 6a and Figure 6b As shown, Figure 5 In some exemplary embodiments Figure 1a A schematic diagram of the planar structure of a hinge device after removing the base of the fixed seat from one of the moving parts. Figure 6a In some exemplary embodiments Figure 1a A schematic diagram of a partial explosion of the moving parts of a hinge mechanism. Figure 6b for Figure 6aThe diagram shows a partial explosion of the moving parts from another perspective. The first connecting plate 13 is provided with a first sliding groove 133, and the first connecting rod 23 is provided with a first sliding part 232, which is slidably disposed in the first sliding groove 133. The second connecting plate is provided with a second sliding groove, and the second connecting rod 24 is provided with a second sliding part 242, which is slidably disposed in the second sliding groove.

[0051] For example, the portion of the first connecting plate 13 located on the first surface of the first support plate 11 is provided with the first sliding groove 133. The first sliding groove 133 can be elongated and its length direction can be parallel to the second direction. One end of the first connecting rod 23 is provided with the first sliding part 232, and the other end is sleeved and fixed on the first rotating shaft 21. The first sliding part 232 can be a columnar protrusion. The shape of the first connecting rod 23 can be irregular and can be designed according to actual conditions. When the first connecting plate 13 rotates under the drive of the first support plate 11, the first connecting plate 13 can drive the first connecting rod 23 to rotate. During the rotation of the first connecting rod 23, the first sliding part 232 slides along the first sliding groove 133. The rotation of the first connecting rod 23 drives the first rotating shaft 21 to rotate. Similarly, the portion of the second connecting plate located on the first surface of the second support plate 12 is provided with the second sliding groove. The second sliding groove can be elongated and its length direction can be parallel to the second direction. One end of the second connecting rod 24 is provided with the second sliding part 242, and the other end is sleeved and fixed on the second rotating shaft 22. The second sliding part 242 can be a columnar protrusion, and the shape of the second connecting rod 24 can be irregular, which can be designed according to the actual situation. When the second connecting plate rotates under the drive of the second support plate 12, the second connecting plate can drive the second connecting rod 24 to rotate. During the rotation of the second connecting rod 24, the second sliding part 242 slides along the second sliding groove, and the rotation of the second connecting rod 24 drives the second rotating shaft 22 to rotate. The first connecting rod 23 and the second connecting rod 24 can be arranged symmetrically.

[0052] In some exemplary embodiments, such as Figure 5As shown, the transmission device may include a gear component 25 rotatably disposed within the fixed base 20; the gear component 25 may include a gear shaft 253 and a first gear 251 and a second gear 252 respectively disposed at both ends of the gear shaft 253. The axial direction of the gear shaft 253 is perpendicular to the axial directions of the first rotating shaft 21 and the second rotating shaft 22. The first gear 251 meshes with a third gear 231 disposed on the first connecting rod 23, and the second gear 252 meshes with a fourth gear 241 disposed on the second connecting rod 24. Exemplarily, the first gear 251, the second gear 252, the third gear 231, and the fourth gear 241 may all be crown gears. The transmission device of this embodiment can save space and has good synchronous movement effect.

[0053] In other embodiments, the transmission device may employ gear mechanisms of other structures. For example, the transmission device may include a first gear and a second gear that are rotatably disposed within the fixed base and mesh with each other. The first gear meshes with a third gear disposed on a first rotating shaft, and the second gear meshes with a fourth gear disposed on a second rotating shaft. The axial directions of the first gear, the second gear, the third gear, and the fourth gear may be parallel to the axial directions of the first rotating shaft and the second rotating shaft.

[0054] In some exemplary embodiments, such as Figure 6a and Figure 6bAs shown, the fixing base 20 may include a base body 202 and a retaining plate 203. The base body 202 includes a base and a side wall disposed on the base. The side wall is provided with a first shaft hole 2021, a second shaft hole 2022, and an extension plate 2023. The extension plate 2023 is disposed opposite to the base. The extension plate 2023 is provided with a first fixing hole, and the base is provided with a second fixing hole at a position corresponding to the first fixing hole. The retaining plate 203 is inserted between the extension plate 2023 and the base. The retaining plate 203 is provided with a third fixing hole at a position corresponding to the first fixing hole and the second fixing hole. In practical applications, the base body 202 and the retaining plate 203 can be fixed together by fasteners (such as screws) passing through the first fixing hole, the second fixing hole, and the third fixing hole. The fasteners can also be configured to fix the hinge device of this embodiment to other devices (such as the mid-frame assembly of a foldable display device). The first fixing hole, the second fixing hole, and the third fixing hole are sometimes referred to as the fixing hole 201 of the fixing base 20. The clamping plate 203 has a first semi-circular groove on its side facing the sidewall, and a second semi-circular groove on the sidewall. The first and second semi-circular grooves together form a shaft hole through which the gear shaft 253 of the gear component 25 passes, and the shaft hole is rotatably engaged with the gear shaft 253 of the gear component 25. One end of the first rotating shaft 21 and the second rotating shaft 22 may each be provided with an annular protrusion. The first rotating shaft 21 and the second rotating shaft 22 can be inserted into the fixing seat 20 through the first shaft hole 2021 and the second shaft hole 2022, respectively. The annular protrusions at the ends of the first rotating shaft 21 and the second rotating shaft 22 are held on the outside of the fixing seat 20, which can play a limiting role. The fixed seat 20 may have an insertion hole on the side facing the guide groove seat 10, and the guide groove seat 10 may have a corresponding insertion post inserted into the insertion hole. The fixed seat 20 and the guide groove seat 10 can be connected by the cooperation of the insertion post and the insertion hole, so that the guide groove seat 10 can be clamped between the two fixed seats 20 of the two moving parts 200.

[0055] In some exemplary embodiments, such as Figure 7 , Figure 8 and Figure 9 As shown, Figure 7 for Figure 5 A partial structural diagram of the hinge device. Figure 8 for Figure 7 A schematic diagram of the structure of the first or second friction component. Figure 9 for Figure 7The diagram shows the structure of the first and second fixed frames, which are integrated into a single structure. The hinge device may further include a first damping part, which may include a first fixed frame 31, a first friction element 32, and a first elastic element 33. The first rotating shaft 21 is rotatably inserted into the first fixed frame 31. The first friction element 32 is sleeved on the first rotating shaft 21 and can rotate with the first rotating shaft 21. The first end face of the first friction element 32 is alternately provided with a first groove 321 and a first protrusion 322. The first fixed frame 31 is provided with a first friction surface that mates with the first end face of the first friction element 32. The first friction surface is alternately provided with a second groove 311 and a second protrusion 312. One end of the first elastic element 33 is fixed, and the other end abuts against the second end face of the first friction element 32. During the process of the first protrusion 322 rotating from the second groove 311 to contact the second protrusion 312, the first friction element 32 can slide along the first rotating shaft 21 and squeeze the first elastic element 33. The first elastic element 33 undergoes elastic deformation due to the squeezing of the first friction element 32.

[0056] For example, such as Figure 7 As shown, the first damping portion may further include a first nut 34 threadedly connected to the first rotating shaft 21. The first elastic element 33 may be a spring and slidably sleeved on the first rotating shaft 21, located between the first nut 34 and the first friction element 32. The first elastic element 33 may be a disc spring assembly including multiple disc springs, or a compression spring, etc. The first end of the first elastic element 33 is limited by the first nut 34, and the second end of the first elastic element 33 abuts against the second end face of the first friction element 32. A first washer 35 may also be provided between the first end of the first elastic element 33 and the first nut 34, and the first washer 35 is sleeved on the first rotating shaft 21. In this example, the holes of the first fixing frame 31, the first elastic element 33, and the first washer 35 that mate with the first rotating shaft 21 may be round holes, and the first fixing frame 31, the first elastic element 33, and the first washer 35 may slide along the first rotating shaft 21 but not rotate with the first rotating shaft 21. In other embodiments, the first nut 34 may be replaced with other limiting elements, such as a retaining ring, etc.

[0057] For example, two parallel planes may be provided on the circumferential surface of the first rotating shaft 21, and two corresponding planes may be provided on the hole wall of the first friction member 32 that mates with the first rotating shaft 21, so that the first friction member 32 can rotate together with the first rotating shaft 21 and slide along the first rotating shaft 21. Figure 8As shown, the highest point of the first boss 322 can be a plane, and this plane can be connected to the bottom of the first groove 321 (which can also be a plane) by an inclined surface or a smooth curved surface. Accordingly, as... Figure 9 As shown, the highest position of the second boss 312 can be a plane, and this plane can be connected to the bottom of the groove 311 (which can be a plane) by an inclined surface or a smooth curved surface.

[0058] For example, such as Figure 8 and Figure 9 As shown, during the process of the first support plate 11 and the second support plate 12 rotating from the flattened state to the folded state, the first boss 322 can rotate out from one of the second grooves 311 and rotate to another of the second grooves 311 after passing through one of the second bosses 312. For example, when the first support plate 11 and the second support plate 12 are in a flattened state, the rotation angle of the first support plate 11 and the second support plate 12 is 90 degrees; when the first support plate 11 and the second support plate 12 are in a folded state, the rotation angle of the first support plate 11 and the second support plate 12 is 0 degrees. Then, when the rotation angle of the first support plate 11 and the second support plate 12 is in the range of 20 degrees to 70 degrees, the first boss 322 contacts the second boss 312. At this time, the first elastic member 33 can generate maximum elastic deformation under the pressure of the first friction member 32. Then, the first end face of the first friction member 32 generates maximum friction force between the first friction surface of the first fixing frame 31, which can make the first support plate 11 and the second support plate 12 stay at any angle in the range of 20 degrees to 70 degrees. When the hinge device of this embodiment is applied to a foldable display device, the display screen can be folded into any angle within a set angle range.

[0059] In some exemplary embodiments, such as Figure 7As shown, the hinge device may further include a second damping portion, which includes a second fixing frame 41, a second friction element 42, and a second elastic element 43. The second rotating shaft 22 is rotatably mounted within the second fixing frame 41. The second friction element 42 is sleeved on the second rotating shaft 22 and can rotate with it. The first end face of the second friction element 42 is alternately provided with a third groove and a third protrusion. The second fixing frame 41 is provided with a second friction surface that mates with the first end face of the second friction element 42. The second friction surface is alternately provided with a fourth groove and a fourth protrusion. One end of the second elastic element 43 is fixed, and the other end abuts against the second end face of the second friction element 42. During the process of the third protrusion rotating from the fourth groove to contacting the fourth protrusion, the second friction element 42 can slide along the second rotating shaft 22 and compress the second elastic element 43. The second elastic element 43 undergoes elastic deformation due to the compression of the second friction element 42. Exemplarily, the second fixing frame 41 in this example can be connected to the first fixing frame 31 as an integral structure.

[0060] For example, such as Figure 7 As shown, the second damping portion may further include a second nut 44 threadedly connected to the second rotating shaft 22. The second elastic member 43 may be a spring and slidably sleeved on the second rotating shaft 22, located between the second nut 44 and the second friction member 42. The second elastic member 43 may be a disc spring assembly including multiple disc springs, or a compression spring, etc. The first end of the second elastic member 43 is limited by the second nut 44, and the second end of the second elastic member 43 abuts against the second end face of the second friction member 42. A second washer 45 may also be provided between the first end of the second elastic member 43 and the second nut 44, and the second washer 45 is sleeved on the second rotating shaft 22. In this example, the holes of the second fixing bracket 41, the second elastic member 43, and the second washer 45 that mate with the second rotating shaft 22 may be round holes. The second fixing bracket 41, the second elastic member 43, and the second washer 45 may slide along the second rotating shaft 22 but not rotate with the second rotating shaft 22. In other embodiments, the second nut 44 may be replaced with other limiting members, such as a retaining ring, etc.

[0061] For example, two parallel planes may be provided on the circumferential surface of the second rotating shaft 22, and two corresponding planes may be provided on the hole wall of the second friction member 42 that mates with the second rotating shaft 22, so that the second friction member 42 can rotate together with the second rotating shaft 22 and slide along the second rotating shaft 22. The highest position of the third boss may be a plane, which can be connected to the bottom of the third groove (which may be a plane) by an inclined plane or a smooth curved surface. Correspondingly, the highest position of the fourth boss may be a plane, which can be connected to the bottom of the fourth groove (which may be a plane) by an inclined plane or a smooth curved surface.

[0062] For example, during the process of the first support plate 11 and the second support plate 12 rotating from the flattened state to the folded state, the third boss rotates out of one of the fourth grooves and then rotates to another of the fourth grooves after passing through one of the fourth bosses. For example, when the first support plate 11 and the second support plate 12 are in a flattened state, the rotation angle of the first support plate 11 and the second support plate 12 is 90 degrees; when the first support plate 11 and the second support plate 12 are in a folded state, the rotation angle of the first support plate 11 and the second support plate 12 is 0 degrees. Then, when the rotation angle of the first support plate 11 and the second support plate 12 is in the range of 20 degrees to 70 degrees, the third boss contacts the fourth boss. At this time, the second elastic member 43 can generate maximum elastic deformation under the pressure of the second friction member 42. Then, the first end face of the second friction member 42 generates maximum friction force between the second friction surface of the second fixing frame 41, which can make the first support plate 11 and the second support plate 12 stay at any angle in the range of 20 degrees to 70 degrees. When the hinge device of this embodiment is applied to a foldable display device, the display screen can be folded into any angle within a set angle range.

[0063] In some exemplary embodiments, such as Figure 7As shown, the first damping component may further include a first fixing member 51 fixed to the fixing base 20, a second fixing member 52 fixed to the first fixing frame 31, a first friction plate 53, and a second friction plate 54. The first rotating shaft 21 is rotatably inserted into the first fixing member 51 and the second fixing member 52. The first friction plate 53 and the second friction plate 54 are both sleeved on the first rotating shaft 21 and can rotate with the first rotating shaft 21. The first friction plate 53 is located between the first fixing member 51 and the second fixing member 52, and generates friction with both the first fixing member 51 and the second fixing member 52 during rotation. The second friction plate 54 is located between the second fixing member 52 and the first fixing frame 31, and generates friction with both the second fixing member 52 and the first fixing frame 31 during rotation. In this embodiment, the friction generated between the first friction plate 53 and the second friction plate 54 and the corresponding components can improve the damping effect, allowing the first support plate 11 and the second support plate 12 to remain at any rotational position.

[0064] For example, such as Figure 10 and Figure 11 As shown, Figure 10 for Figure 7 A structural diagram of the second or fourth fastener. Figure 11 for Figure 7 The schematic diagram of the friction plates shows that the second fixing member 52 has a central hole that mates with the first rotating shaft 21, and a fixing post that can be inserted into an insertion hole on the first fixing frame 31. To increase friction, multiple protrusions can be provided on the surfaces of the second fixing member 52 that mate with the first friction plates 53 and 54. The central holes of the first friction plates 53 and 54 that mate with the first rotating shaft 21 can be square holes to allow the first friction plates 53 and 54 to rotate together with the first rotating shaft 21.

[0065] In some exemplary embodiments, such as Figure 7As shown, the second damping part may further include a third fixing member 61 fixed on the fixing base 20, a fourth fixing member 62 fixed on the second fixing frame 41, a third friction plate 63, and a fourth friction plate 64; the second rotating shaft 22 is also rotatably inserted into the third fixing member 61 and the fourth fixing member 62. The third friction plate 63 and the fourth friction plate 64 are both sleeved on the second rotating shaft 22 and can rotate together with the second rotating shaft 22. The third friction plate 63 is located between the third fixing member 61 and the fourth fixing member 62. During rotation, the third friction plate 63 generates friction with both the third fixing member 61 and the fourth fixing member 62. The fourth friction plate 64 is located between the fourth fixing member 62 and the second fixing frame 41. During rotation, the fourth friction plate 64 generates friction with both the fourth fixing member 62 and the second fixing frame 41. In this embodiment, the frictional force generated between the third friction plate 63 and the fourth friction plate 64 and the corresponding components can improve the damping effect, allowing the first support plate 11 and the second support plate 12 to stay at any rotational position.

[0066] In this embodiment, the third fixing member 61 can be connected to the first fixing member 51 as an integral structure. The structure of the fourth fixing member 62 can be the same as that of the second fixing member 52, and the structures of the third friction plate 63, the fourth friction plate 64, the second friction plate 54, and the first friction plate 53 can be the same.

[0067] In some exemplary embodiments, such as Figure 12 As shown, Figure 12 for Figure 7 The schematic diagram shows the structure of the first or second rotating shaft. The structures of the first rotating shaft 21 and the second rotating shaft 22 can be the same. Taking the first rotating shaft 21 as an example, the first end of the first rotating shaft 21 can be provided with an annular protrusion, which is configured to be clamped on the outside of the fixed seat 20. The second end of the first rotating shaft 21 can be provided with a thread, which is configured to be threadedly connected to the first nut 34. The shaft body of the first rotating shaft 21 has a flat surface, which is configured to mate with the holes of some components of the first damping part.

[0068] This disclosure also provides a foldable display device, such as... Figure 13a , Figure 13b and Figure 14 As shown, Figure 13a This is a schematic diagram of the mid-frame assembly of a foldable display device in a folded state, as shown in some exemplary embodiments. Figure 13b for Figure 13a A structural diagram of the mid-frame component in its flattened state. Figure 14This is a schematic diagram of the structure of a foldable display device in a folded state according to some exemplary embodiments. The foldable display device may include a flexible display module 905 and a mid-frame assembly. The mid-frame assembly includes a first plate 901, a second plate 902, and a hinge device 903 as described in any of the preceding embodiments. The first plate 901 is fixedly connected to the first support plate 11, and the second plate 902 is fixedly connected to the second support plate 12. The side of the flexible display module 905 facing away from the display side is fixed to the first plate 901 and the second plate 902.

[0069] For example, the first plate 901 can be fixedly connected to the first support plate 11 by a third fastener (such as a screw), the third fastener passing through the first mounting hole 113 of the first support plate 11; the second plate 902 can be fixedly connected to the second support plate 12 by a fourth fastener (such as a screw), the fourth fastener passing through the second mounting hole 123 of the second support plate 12.

[0070] Exemplarily, the mid-frame assembly may further include a third plate 904, which is fixedly connected to the fixing seat 20 of the moving part 200 via a fifth fastener, the fifth fastener passing through the fixing hole 201 of the fixing seat 20. One side surface of the first plate 901, the second plate 902, the first support plate 11, the second support plate 12, and the third plate 904 is flush, configured to provide flat support for the flexible display module 905 when the foldable display device is in a flattened state. The side of the flexible display module 905 opposite to the display side can be bonded to the first plate 901 and the second plate 902 via an adhesive layer.

[0071] In other exemplary embodiments, the foldable display device of this disclosure may include a flexible display module and a hinge device as described in any of the preceding embodiments, wherein the side of the flexible display module opposite to the display side may be fixed to the first support plate and the second support plate. In this embodiment, the flexible display module can be supported by the first support plate and the second support plate.

[0072] The foldable display device of this disclosure can be a foldable display device such as a mobile phone or a laptop.

[0073] In this description, "parallel" refers to the state where the angle formed by two straight lines is greater than -10° and less than 10°, and therefore includes the state where the angle is greater than -5° and less than 5°. Similarly, "perpendicular" refers to the state where the angle formed by two straight lines is greater than 80° and less than 100°, and therefore includes the state where the angle is greater than 85° and less than 95°.

[0074] In this specification, for convenience, terms such as "middle," "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer" are used to indicate orientation or positional relationships in conjunction with the accompanying drawings. This is solely for the purpose of facilitating the description and simplification, and does not imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this disclosure. The positional relationships of the constituent elements may be appropriately varied depending on the orientation of each constituent element being described. Therefore, the use of terms not limited to those described in the specification may be appropriately replaced as needed.

[0075] In this description, unless otherwise expressly specified and limited, the terms "connection," "fixed connection," "installation," and "assembly" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; the terms "installation," "connection," and "fixed connection" can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art will understand the meaning of the above terms in the embodiments of this disclosure as appropriate.

Claims

1. A hinge device, comprising a rotating part and a moving part; The rotating part includes a guide slot seat, a first support plate, a second support plate, a first connecting plate, and a second connecting plate; the guide slot seat is provided with a first non-circular arc guide slot, a second non-circular arc guide slot, a first circular arc guide slot, and a second circular arc guide slot; the first support plate is provided with a first non-circular arc rotating part that rotatably engages with the first non-circular arc guide slot, the second support plate is provided with a second non-circular arc rotating part that rotatably engages with the second non-circular arc guide slot, the first connecting plate is provided with a first circular arc rotating part that rotatably engages with the first circular arc guide slot, and the second connecting plate is provided with a second circular arc rotating part that rotatably engages with the second circular arc guide slot; the first connecting plate is slidably connected to the first support plate, and the second connecting plate is slidably connected to the second support plate; The synchronously moving part includes a first connecting rod, a second connecting rod, a fixed base, a first rotating shaft and a second rotating shaft rotatably disposed within the fixed base and arranged in parallel, and a transmission device; the first connecting rod is fixedly connected to the first rotating shaft and slidably connected to the first connecting plate, the second connecting rod is fixedly connected to the second rotating shaft and slidably connected to the second connecting plate, and the transmission device is configured to make the first rotating shaft and the second rotating shaft rotate synchronously.

2. The hinge device as claimed in claim 1, wherein, Both the first connecting plate and the second connecting plate are provided in pairs, and the moving parts are provided in pairs; A first connecting rod of one of the two moving parts is connected to one of the two first connecting plates, and a first connecting rod of the other of the two moving parts is connected to the other of the two first connecting plates; a second connecting rod of one of the two moving parts is connected to one of the two second connecting plates, and a second connecting rod of the other of the two moving parts is connected to the other of the two second connecting plates. The first support plate and the second support plate are symmetrically arranged on both sides of the guide groove seat along the first direction, and the two moving parts are symmetrically arranged on both sides of the guide groove seat along the second direction, wherein the first direction and the second direction are perpendicular to each other.

3. The hinge device as claimed in claim 2, wherein, Two first connecting plates and two second connecting plates are symmetrically arranged on both sides of the guide groove seat along the second direction. The first connecting plates and the second connecting plates connected to the same moving part are symmetrically arranged on both sides of the guide groove seat along the first direction.

4. The hinge device as claimed in claim 2, wherein, The guide slot seat is symmetrically arranged about a first axis of symmetry and about a second axis of symmetry, the first axis of symmetry being parallel to the first direction and the second axis of symmetry being parallel to the second direction.

5. The hinge device as claimed in claim 4, wherein, The guide slot seat includes two sub-guide slot seats, which are symmetrically arranged about the second axis of symmetry, and each sub-guide slot seat is symmetrically arranged about the first axis of symmetry. Each sub-guide slot seat is divided into two parts by the first axis of symmetry, and each of the two parts is provided with a non-circular arc guide slot and a circular arc guide slot. The first support plate is provided with two first non-circular arc rotating parts, and the two first non-circular arc rotating parts are respectively rotatably engaged with two non-circular arc guide grooves located on one side of the first axis of symmetry; the second support plate is provided with two second non-circular arc rotating parts, and the two second non-circular arc rotating parts are respectively rotatably engaged with two non-circular arc guide grooves located on the other side of the first axis of symmetry. Each of the two first connecting plates is provided with a first arc rotating part, and the two first arc rotating parts are respectively rotatably engaged with two arc guide grooves located on one side of the first axis of symmetry; each of the two second connecting plates is provided with a second arc rotating part, and the two second arc rotating parts are respectively rotatably engaged with two arc guide grooves located on the other side of the first axis of symmetry.

6. The hinge device as claimed in claim 4, wherein, The hinge device is symmetrically arranged about the first axis of symmetry and about the second axis of symmetry.

7. The hinge device as claimed in claim 1 further includes a first damping portion, the first damping portion including a first fixing frame, a first friction element, and a first elastic element; the first rotating shaft is rotatably disposed within the first fixing frame, the first friction element is sleeved on the first rotating shaft and can rotate together with the first rotating shaft, the first end face of the first friction element is alternately provided with a first groove and a first protrusion, the first fixing frame is provided with a first friction surface that mates with the first end face of the first friction element, the first friction surface is alternately provided with a second groove and a second protrusion; one end of the first elastic element is fixed, and the other end abuts against the second end face of the first friction element; during the process of the first protrusion rotating from the second groove to contacting the second protrusion, the first friction element can slide along the first rotating shaft and squeeze the first elastic element, and the first elastic element undergoes elastic deformation due to the squeezing of the first friction element; Or / and, it also includes a second damping part, the second damping part including a second fixed frame, a second friction element and a second elastic element; the second rotating shaft is also rotatably inserted into the second fixed frame, the second friction element is sleeved on the second rotating shaft and can rotate with the second rotating shaft, the first end face of the second friction element is alternately provided with a third groove and a third protrusion, the second fixed frame is provided with a second friction surface that mates with the first end face of the second friction element, the second friction surface is alternately provided with a fourth groove and a fourth protrusion; one end of the second elastic element is fixed, and the other end abuts against the second end face of the second friction element; during the process of the third protrusion rotating from the fourth groove to contacting the fourth protrusion, the second friction element can slide along the second rotating shaft and squeeze the second elastic element, and the second elastic element undergoes elastic deformation due to the squeezing of the second friction element.

8. The hinge device as claimed in claim 7, wherein, During the process of the first support plate and the second support plate rotating from the flattened state to the folded state, the first boss rotates out of one second groove and passes through one second boss before rotating into another second groove; Or / and, during the process of the first support plate and the second support plate rotating from the flattened state to the folded state, the third boss rotates out of one of the fourth grooves and rotates to another of the fourth grooves after passing through one of the fourth bosses.

9. The hinge device as claimed in claim 7, wherein, The first damping part further includes a first nut threadedly connected to the first rotating shaft, and the first elastic element is a spring that is slidably sleeved on the first rotating shaft and located between the first nut and the first friction element. Or / and, the second damping portion further includes a second nut threadedly connected to the second rotating shaft, the second elastic element being a spring slidably sleeved on the second rotating shaft, and located between the second nut and the second friction element.

10. The hinge device as claimed in claim 7, wherein, The first damping part further includes a first fixing member fixed on the fixed base, a second fixing member fixed on the first fixed frame, a first friction plate, and a second friction plate; the first rotating shaft is rotatably inserted into the first fixing member and the second fixing member, the first friction plate and the second friction plate are both sleeved on the first rotating shaft and can rotate together with the first rotating shaft, the first friction plate is located between the first fixing member and the second fixing member, and the first friction plate generates friction with both the first fixing member and the second fixing member during rotation, the second friction plate is located between the second fixing member and the first fixed frame, and the second friction plate generates friction with both the second fixing member and the first fixed frame during rotation; Or / and, the second damping part further includes a third fixing member fixed on the fixed base, a fourth fixing member fixed on the second fixed frame, a third friction plate, and a fourth friction plate; the second rotating shaft is also rotatably inserted inside the third fixing member and the fourth fixing member, the third friction plate and the fourth friction plate are both sleeved on the second rotating shaft and can rotate together with the second rotating shaft, the third friction plate is located between the third fixing member and the fourth fixing member, and the third friction plate generates friction with both the third fixing member and the fourth fixing member during rotation, the fourth friction plate is located between the fourth fixing member and the second fixed frame, and the fourth friction plate generates friction with both the fourth fixing member and the second fixed frame during rotation.

11. The hinge device as claimed in claim 1, wherein, The rotating part also includes a first fixing plate and a second fixing plate; The first fixing plate is fixed to the first support plate by the first fastener, the first connecting plate is clamped between the first fixing plate and the first support plate, the first connecting plate is provided with a first sliding hole, the first fastener passes through the first sliding hole and can slide along the first sliding hole; The second fixing plate is fixed to the second support plate by the second fastener, the second connecting plate is clamped between the second fixing plate and the second support plate, the second connecting plate is provided with a second sliding hole, the second fastener passes through the second sliding hole and can slide along the second sliding hole.

12. The hinge device as claimed in claim 1, wherein, The first circular arc rotating part rotates around the first rotation center line, and the second circular arc rotating part rotates around the second rotation center line. Both the first rotation center line and the second rotation center line are parallel to the axial direction of the first rotating shaft and the second rotating shaft.

13. The hinge device as claimed in claim 1, wherein, The first connecting plate is provided with a first sliding groove, and the first connecting rod is provided with a first sliding part, the first sliding part being slidably disposed in the first sliding groove; the second connecting plate is provided with a second sliding groove, and the second connecting rod is provided with a second sliding part, the second sliding part being slidably disposed in the second sliding groove.

14. The hinge device as claimed in claim 1, wherein, The transmission device includes a gear component rotatably disposed within the fixed base; the gear component includes a gear shaft and a first gear and a second gear respectively disposed at both ends of the gear shaft, the axial direction of the gear shaft being perpendicular to the axial direction of the first rotating shaft and the second rotating shaft, the first gear meshing with a third gear disposed on the first connecting rod, and the second gear meshing with a fourth gear disposed on the second connecting rod.

15. A foldable display device, comprising a flexible display module and a mid-frame assembly, the mid-frame assembly comprising a first plate, a second plate, and a hinge device as described in any one of claims 1 to 14; the first plate is fixedly connected to a first support plate, and the second plate is fixedly connected to a second support plate; the side of the flexible display module opposite to the display side is fixed to the first plate and the second plate.

16. A foldable display device, comprising a flexible display module and a hinge device according to any one of claims 1 to 14, wherein the side of the flexible display module opposite to the display side is fixed to the first support plate and the second support plate.

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