Support device and folding display device

Abstract

The present application discloses a support device and a folding display device, which relate to the field of display technology. The first support plate and the fourth support plate of the support assembly in the support device are used to support the non-bending part of the flexible display module, and the second support plate and the third support plate are used to support the bending part of the flexible display module. Since the first rotating part and the second rotating part of the rotating hinge connected to the support assembly can rotate relative to the fixed base, and the rotation directions are opposite, the folding of the flexible display module can be achieved. In addition, when the flexible display module is folded, the second support plate and the third support plate can be located on both sides of the bending part of the flexible display module, so that after the flexible display module is folded, its folding part can be appropriately sunken, thereby reducing the amount of slippage when the flexible display module is folded, and the folding effect is better.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a supporting device and a foldable display device. Background Art

[0002] With the development of science and technology, flexible display panels have been widely used in foldable display devices due to their good bending performance.

[0003] In the related art, a folding display device includes: a flexible display panel and a support device located on one side of the flexible display panel. The flexible display panel has a bending portion and non-bending portions located on both sides of the bending portion. The support device may include a first support plate, a second support plate, a fixed support plate, a third support plate and a fourth support plate connected in sequence. Among them, the second support plate, the fixed support plate and the third support plate are used to support the bending portion of the flexible display panel, and the first support plate and the fourth support plate are used to support the non-bending portion of the flexible display panel. In addition, the support device also includes a rotating hinge, which is fixedly arranged on the surface of the fixed support plate, and one end of the rotating hinge is connected to the second support plate, and the other end is connected to the second support plate. Among them, the rotating hinge can drive the second support plate and the third support plate to rotate, so that the second support plate and the third support plate are both rotated relative to the fixed support plate to achieve the folding of the display device.

[0004] However, the supporting device of the above solution includes a large number of supporting plates, and the assembly of the supporting device is complicated. In addition, due to the design of the fixed supporting plate, when the display device is folded, the bent portion of the flexible display panel needs to be located on the upper side of the fixed supporting plate to avoid the fixed supporting plate and the flexible display panel from affecting each other. However, this method will cause a large amount of slippage when the flexible display panel is folded, and the folding effect is poor. Summary of the invention

[0005] The present application provides a support device and a folding display device, which can solve the problem of large slippage and poor folding effect of the flexible display panel when folding in the related art. The technical solution is as follows:

[0006] In one aspect, a supporting device is provided, the supporting device being used to support a flexible display module, the flexible display module having a bending portion and a first non-bending portion and a second non-bending portion located on both sides of the bending portion; the supporting device comprising:

[0007] A support assembly, comprising a first support plate, a second support plate, a third support plate and a fourth support plate connected in sequence, wherein the first support plate is used to support the first non-bending portion, the second support plate and the third support plate are used to support the bending portion, and the fourth support plate is used to support the second non-bending portion;

[0008] and a rotating hinge, the rotating hinge comprising a fixed base, and a first rotating part and a second rotating part rotatably connected to the fixed base, the orthographic projection of the axis of the fixed base on the supporting assembly overlaps with a boundary line between the second supporting plate and the third supporting plate, the first rotating part is connected to the second supporting plate, the second rotating part is connected to the third supporting plate, the rotating direction of the first rotating part relative to the fixed base is opposite to the rotating direction of the second rotating part relative to the fixed base, and when the first rotating part and the second rotating part are rotated to a target position, the second supporting plate and the third supporting plate are located on both sides of a bent portion of the flexible display module;

[0009] Wherein, the target position is the position where the first rotating part and the second rotating part are located when the flexible display module is folded.

[0010] Optionally, the first rotating part includes a first connecting rod and a first connecting member, the first end of the first connecting rod is rotatably connected to the fixed base, the second end of the first connecting rod is fixedly connected to the first connecting member, the first connecting member is rotatably connected to the second supporting plate, and the first connecting member is fixedly connected to the first supporting plate;

[0011] The second rotating part includes a second connecting rod and a second connecting member, the first end of the second connecting rod is rotatably connected to the fixed base, the second end of the second connecting rod is fixedly connected to the second connecting member, the second connecting member is rotatably connected to the third support plate, and the second connecting member is fixedly connected to the fourth support plate.

[0012] Optionally, the fixed base has a first arc-shaped slideway and a second arc-shaped slideway; the first end of the first connecting rod is a first arc-shaped plate, and the first end of the second connecting rod is a second arc-shaped plate;

[0013] Wherein, the first arc plate is located in the first arc slideway and is used for sliding in the first arc slideway; the second arc plate is located in the second arc slideway and is used for sliding in the second arc slideway.

[0014] Optionally, the first connecting rod further comprises a first limiting structure located on a side of the first curved plate away from the second end of the first connecting rod, the first limiting structure being used to limit a rotation angle of the first curved plate in the first curved slideway;

[0015] The second connecting rod further includes a second limiting structure located on a side of the second arc-shaped plate away from the second end of the second connecting rod, and the second limiting structure is used to limit a rotation angle of the second arc-shaped plate in the second arc-shaped slideway.

[0016] Optionally, the second end of the first connecting rod has a first through hole, the first connecting member is a strip-shaped structure, the first position of the first connecting member has a first connecting hole, and the first position is located between the first end and the second end of the first connecting member; the rotary hinge further includes: a first screw, the first screw passes through the first through hole and is connected to the first connecting hole;

[0017] The second end of the second connecting rod has a second through hole, the second connecting member is a strip structure, the second connecting member is a strip structure, the second position of the second connecting member has a second connecting hole, and the second position is located between the first end and the second end of the second connecting member; the rotating hinge also includes: a second screw, the second screw passes through the second through hole and is connected to the second connecting hole.

[0018] Optionally, the first end of the first connecting member has a first arc-shaped connecting groove, the side surface of the second supporting plate includes a first plate body and a first arc-shaped connecting protrusion located on the first plate body, the first arc-shaped connecting protrusion is located in the first arc-shaped connecting groove and can rotate in the first arc-shaped connecting groove;

[0019] The first end of the second connecting member has a second arc-shaped connecting groove, the side surface of the third supporting plate includes a second plate body and a second arc-shaped connecting protrusion located on the second plate body, the second arc-shaped connecting protrusion is located in the second arc-shaped connecting groove and can rotate in the second arc-shaped connecting groove.

[0020] Optionally, the rotary hinge further comprises: a gear set; the gear set comprises: a first gear structure and a second gear structure;

[0021] The first end of the first gear structure has a first clamping portion, the first clamping portion includes a first clamping piece and a second clamping piece with a gap and arranged opposite to each other, the first clamping piece has a third through hole, the second clamping piece has a fourth through hole, the second end of the first connector includes a second clamping portion, the second clamping portion has a first arc-shaped through hole; the rotary hinge further includes: a first connecting pin, the second clamping portion is located between the first clamping piece and the second clamping piece, the first connecting pin passes through the third through hole of the first clamping piece, the first arc-shaped through hole of the second clamping piece and the fourth through hole of the second clamping piece in sequence;

[0022] The first end of the second gear structure has a third clamping portion, the second clamping portion includes a third clamping member and a fourth clamping member that are arranged opposite to each other with a gap, the third clamping member has a fifth through hole, the fourth clamping member has a sixth through hole, the second end of the second connecting member includes a fourth clamping portion, the fourth clamping portion has a second arc-shaped through hole; the rotating hinge also includes: a second connecting pin, the fourth clamping portion is located between the third clamping member and the fourth clamping member, the second connecting pin passes through the fifth through hole of the third clamping member, the second arc-shaped through hole of the fourth clamping member and the sixth through hole of the fourth clamping member in sequence.

[0023] Optionally, the first connecting pin shaft is in interference fit with the third through hole and the fourth through hole, and the first connecting pin shaft is in clearance fit with the first arc-shaped through hole;

[0024] The second connecting pin shaft is interference fit with the fifth through hole and the sixth through hole, and the first connecting pin shaft is clearance fit with the second arc-shaped through hole.

[0025] Optionally, the gear set further includes: a first gear and a second gear located between the first gear structure and the second gear structure, the first gear and the second gear being meshed with each other;

[0026] The first gear structure has a first gear portion at a second end, the first gear portion is meshed with the first gear, and the second gear structure has a second gear portion at a second end, the second gear portion is meshed with the second gear.

[0027] Optionally, the first side of the first gear structure has a first concavo-convex portion, and the first side of the second gear structure has a second concavo-convex portion; the rotary hinge further comprises: a connecting wheel set; the connecting wheel set comprises: a connecting rod, and a third concavo-convex portion and a fourth concavo-convex portion respectively connected to both ends of the connecting rod;

[0028] The third concavo-convex portion and the first concavo-convex portion mesh with each other, and the fourth concavo-convex portion and the second concavo-convex portion mesh with each other.

[0029] Optionally, the first concave-convex portion has a seventh through hole, the second concave-convex portion has an eighth through hole, the first gear has a ninth through hole, and the second gear has a tenth through hole; the rotary hinge further includes: a third connecting pin, a fourth connecting pin, a fifth connecting pin, a sixth connecting pin, a double-connected retaining spring, and a quadruple-connected retaining spring;

[0030] The first end of the third connecting pin shaft has a first clamping groove, the first end of the third connecting pin shaft passes through the seventh through hole, and the first clamping groove is located on the second side of the first gear structure;

[0031] The first end of the fourth connecting pin shaft has a second clamping groove, the first end of the fourth connecting pin shaft passes through the eighth through hole, and the second clamping groove is located on the second side of the second gear structure;

[0032] The first end of the fifth connecting pin shaft has a third clamping groove, and the second end has a fourth clamping groove, the fifth connecting pin shaft passes through the ninth through hole, and the third clamping groove and the fourth clamping groove are respectively located on both sides of the first gear;

[0033] The first end of the sixth connecting pin shaft has a fifth clamping groove, and the second end has a sixth clamping groove, the sixth connecting pin shaft passes through the tenth through hole, and the fifth clamping groove and the sixth clamping groove are respectively located on both sides of the second gear;

[0034] The double-linked clamping spring is clamped with the third clamping slot and the fifth clamping slot, and the quadruple-linked clamping spring is sequentially clamped with the first clamping slot, the fourth clamping slot, the sixth clamping slot and the second clamping slot.

[0035] Optionally, the third concave-convex portion has an eleventh through hole, and the fourth concave-convex portion has a twelfth through hole; the rotary hinge further includes: a first torsion spring, a second torsion spring, a first nut and a second nut;

[0036] The first torsion spring is located at a side of the connecting wheel set away from the gear set, and the second end of the third connecting pin shaft passes through the eleventh through hole and the first torsion spring in sequence, and is connected to the first nut;

[0037] The second torsion spring is located on a side of the connecting wheel set away from the gear set, and the second end of the fourth connecting pin shaft passes through the twelfth through hole and the second torsion spring in sequence and is connected to the second nut.

[0038] Optionally, one side of the fixed base includes a first connecting block and a second connecting block which are arranged opposite to each other and have a gap therebetween, the first connecting block has a thirteenth through hole, and the second connecting block has a fourteenth through hole;

[0039] The surface of the second support plate close to the fixed base has a fifth clamping portion, the fifth clamping portion has a third arc-shaped through hole, the surface of the third support plate close to the fixed base has a sixth clamping portion, the sixth clamping portion has a fourth arc-shaped through hole;

[0040] The supporting device also includes: a seventh connecting pin and an eighth connecting pin, the seventh connecting pin passes through the thirteenth through hole and the third arc-shaped through hole, and the eighth connecting pin passes through the fourteenth through hole and the fourth arc-shaped through hole.

[0041] Optionally, the seventh connecting pin shaft and the thirteenth through hole are in an interference fit, and the seventh connecting pin shaft and the third arc-shaped through hole are in a clearance fit;

[0042] The eighth connecting pin shaft and the fourteenth through hole are in interference fit, and the eighth connecting pin shaft and the fourth arc-shaped through hole are in clearance fit.

[0043] On the other hand, a foldable display device is provided, the foldable display device comprising: a flexible display module and a supporting device as described in the above aspect;

[0044] Wherein, the supporting device is located on the non-display surface of the flexible display module and is used to support the flexible display module.

[0045] The beneficial effects of the technical solution provided by this application include at least:

[0046] The present application provides a support device and a folding display device, in which the first support plate and the fourth support plate of the support assembly in the support device are used to support the non-bending part of the flexible display module, and the second support plate and the third support plate are used to support the bending part of the flexible display module. Since the first rotating part and the second rotating part of the rotating hinge connected to the support assembly can both rotate relative to the fixed base, and the rotation directions are opposite, the folding of the flexible display module can be achieved. In addition, when the flexible display module is folded, the second support plate and the third support plate can be located on both sides of the bending part of the flexible display module, so that after the flexible display module is folded, its folding part can be appropriately sunken, thereby reducing the amount of slippage when the flexible display module is folded, and the folding effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0048] Figure 1 is a structural schematic diagram of a flexible display module provided in an embodiment of the present application;

[0049] Figure 2 is a structural schematic diagram of a support device provided in an embodiment of the present application;

[0050] Figure 3 is a schematic structural diagram of a rotary hinge provided in an embodiment of the present application;

[0051] Figure 4 is an exploded schematic diagram of a rotary hinge provided in an embodiment of the present application;

[0052] Figure 5 is a partial schematic diagram of a foldable display device provided in an embodiment of the present application;

[0053] Figure 6 is a schematic diagram of a fixed base and a first rotating part provided in an embodiment of the present application;

[0054] Figure 7 is a schematic diagram of another fixed base and a first rotating part provided in an embodiment of the present application;

[0055] Figure 8 is a schematic diagram of a first rotating part provided in an embodiment of the present application;

[0056] Fig. 9 is a partial schematic diagram of a supporting device provided in an embodiment of the present application;

[0057] Fig.10 is a schematic diagram of a first gear structure provided in an embodiment of the present application;

[0058] Fig.11 is a schematic diagram of a first connecting member provided in an embodiment of the present application;

[0059] Fig.12 is a schematic diagram of a gear set provided in an embodiment of the present application;

[0060] Fig.13 is a schematic diagram of another gear set provided in an embodiment of the present application;

[0061] Fig.14 is a schematic diagram of a connecting wheel set provided in an embodiment of the present application;

[0062] Fig.15 It is a partial schematic diagram of another foldable display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0063] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0064] The embodiment of the present application provides a supporting device, which can be used to support the flexible display module 20. Figure 1 The flexible display module 20 has a bending portion 20a and a first non-bending portion 20b and a second non-bending portion 20c located on both sides of the bending portion 20a. Figure 2The support device 10 includes a support assembly 11 and a rotating hinge 12. The support assembly 11 includes a first support plate 111, a second support plate 112, a third support plate 113 and a fourth support plate 114 connected in sequence. The first support plate 111 is used to support the first non-bending portion 20b, the second support plate 112 and the third support plate 113 are used to support the bending portion 20a, and the fourth support plate 114 is used to support the second non-bending portion 20c.

[0065] Figure 3 It is a structural schematic diagram of a rotary hinge provided in an embodiment of the present application. Figure 4 Schematic diagram of an exploded view of a rotary hinge provided in an embodiment of the present application. Figure 3 and Figure 4 The rotating hinge 12 includes a fixed base 1201 , and a first rotating part 1202 and a second rotating part 1203 rotatably connected to the fixed base 1201 .

[0066] The orthographic projection of the axis of the fixed base 1201 on the support assembly 11 overlaps with the boundary line between the second support plate 112 and the third support plate 113. The first rotating part 1202 is connected to the second support plate 112, and the second rotating part 1203 is connected to the third support plate 113. That is, when the first rotating part 1202 rotates relative to the fixed base 1201, the second support plate 112 can be driven to rotate, and when the second rotating part 1203 rotates relative to the fixed base 1201, the third support plate 113 can be driven to rotate. Further, the flexible display module 20 can be folded along the boundary line between the second support plate 112 and the third support plate 113. The axis of the flexible display module 20 can be the center line of the bent portion 20a. Furthermore, the fixed base 1201 is located in the middle of the support assembly 11 , so that when the first rotating portion 1202 and the second rotating portion 1203 rotate relative to the fixed base 1201 , the support assembly 11 can support the flexible display module 20 to be folded along its central axis.

[0067] The rotation direction of the first rotating part 1202 relative to the fixed base 1201 is opposite to the rotation direction of the second rotating part 1203 relative to the fixed base 1201. For example, when the flexible display module 20 is folded, the rotation direction of the first rotating part 1202 relative to the fixed base 1201 is clockwise, and the rotation direction of the second rotating part 1203 relative to the fixed base 1201 is counterclockwise; when the flexible display module 20 is unfolded, the rotation direction of the first rotating part 1202 relative to the fixed base 1201 is counterclockwise, and the rotation direction of the second rotating part 1203 relative to the fixed base 1201 is clockwise.

[0068] Furthermore, when the first rotating part 1202 and the second rotating part 1203 rotate to the target position, the second supporting plate 112 and the third supporting plate 113 may be located on both sides of the bent portion 20a of the flexible display module 20. The target position is the position where the first rotating part 1202 and the second rotating part 1203 are located when the flexible display module 20 is folded. For example, the target position of each rotating part of the first rotating part 1202 and the second rotating part 1203 when the flexible display module 20 is folded is a position where the rotating part and the bearing surface of the fixed base 1201 are substantially perpendicular.

[0069] refer to Figure 5 , the part of the bent portion 20a close to the fixed base 1201 can be in the shape of a water drop. In addition, since the second support plate 112 and the third support plate 113 are located on both sides of the bent portion 20a of the flexible display module 20 when the flexible display module 20 is folded, a certain avoidance space (accommodation space) can be provided for the folding of the flexible display module 20, so that the folded portion (water drop structure) of the flexible display module 20 can be located in the avoidance space after the flexible display module 20 is folded, and the water drop structure of the flexible display module 20 can be appropriately sunken (close to the fixed base 1201). In this way, the slippage amount of the flexible display module 20 when folded can be reduced, and the folding effect is better.

[0070] In summary, an embodiment of the present application provides a support device, in which the first support plate and the fourth support plate of the support assembly are used to support the non-bending part of the flexible display module, and the second support plate and the third support plate are used to support the bending part of the flexible display module. Since the first rotating part and the second rotating part of the rotating hinge connected to the support assembly can rotate relative to the fixed base, and the rotation directions are opposite, the folding of the flexible display module can be achieved. In addition, when the flexible display module is folded, the second support plate and the third support plate can be located on both sides of the bending part of the flexible display module, so that after the flexible display module is folded, its folding part can be appropriately sunken, thereby reducing the amount of slippage when the flexible display module is folded, and the folding effect is better.

[0071] refer to Figure 4 The first rotating part 1202 includes a first connecting rod 12021 and a first connecting member 12022. The first end of the first connecting rod 12021 is rotatably connected to the fixed base 1201, and the second end of the first connecting rod 12021 is fixedly connected to the first connecting member 12022. The first connecting member 12022 is rotatably connected to the second support plate 112, and the first connecting member 12022 is fixedly connected to the first support plate 111.

[0072] Thus, when the first connecting rod 12021 rotates relative to the fixed base 1201, the first connecting member 12022 can be driven to rotate together. In addition, the first connecting member 12022 is connected to the second support plate 112 and the first support plate 111, thereby driving the second support plate 112 and the first support plate 111 to rotate. Since the first connecting member 12022 and the second support plate 112 are rotatably connected, a rotation margin can be provided between the first connecting member 12022 and the second support plate 112 to ensure the rotation effect.

[0073] In addition, the structure of the second rotating part 1203 can be similar to that of the first rotating part 1202. For example, the second rotating part 1203 includes a second connecting rod 12031 and a second connecting member 12032. The first end of the second connecting rod 12031 is rotatably connected to the fixed base 1201, and the second end of the second connecting rod 12031 is fixedly connected to the second connecting member 12032. The second connecting member 12032 is rotatably connected to the third support plate 113, and the second connecting member 12032 is fixedly connected to the fourth support plate 114.

[0074] Thus, when the second connecting rod 12031 rotates relative to the fixed base 1201, the second connecting member 12032 can be driven to rotate together. In addition, the second connecting member 12032 is connected to the fourth support plate 114 and the third support plate 113, thereby driving the fourth support plate 114 and the third support plate 113 to rotate. Since the second connecting member 12032 and the fourth support plate 114 are rotatably connected, a rotation margin can be provided between the second connecting member 12032 and the fourth support plate 114 to ensure the rotation effect.

[0075] refer to Figure 4The fixed base 1201 has a first curved slide 1201a and a second curved slide 1201b. The first end of the first connecting rod 12021 is a first curved plate 12021a, which is located in the first curved slide 1201a and is used to slide in the first curved slide 1201a. The first curved plate 12021a can match the first curved slide 1201a, so that the first curved plate 12021a can move along the arc direction of the first curved slide 1201a when sliding in the first curved slide 1201a, thereby realizing the rotation connection between the first rotating part 1202 and the fixed base 1201. Correspondingly, the first end of the second connecting rod 12031 is a second curved plate 12031a, which is located in the second curved slide 1201b and is used to slide in the second curved slide 1201b. Among them, the second arc plate 12031a can match the first arc slide 1201a, so that the second arc plate 12031a can move along the arc direction of the second arc slide 1201b when sliding in the second arc slide 1201b, thereby realizing the rotational connection between the second rotating part 1203 and the fixed base 1201.

[0076] Optionally, the first curved slide 1201a and the second curved slide 1201b can be located on both sides of the central axis of the fixed base 1201, and the first curved slide 1201a and the second curved slide 1201b are staggered in the direction of the central axis of the fixed base 1201. In this way, the sliding of the first curved plate 12021a of the first rotating part 1202 in the first curved slide 1201a and the sliding of the second curved plate 12031a of the second rotating part 1203 in the second curved slide 1201b can be avoided from affecting each other, thereby ensuring the reliability of the rotation of the two rotating parts and the fixed base 1201.

[0077] Figure 6 It is a schematic diagram of an arc-shaped plate sliding in an arc-shaped slide provided in an embodiment of the present application. Figure 7 Schematic diagram of another arc-shaped plate sliding in an arc-shaped slide provided in an embodiment of the present application. Figure 6 and Figure 7 The first connecting rod 12021 may further include a first limiting structure 12021b located on a side of the first curved plate 12021a away from the second end of the first connecting rod 12021. The first limiting structure 12021b is used to limit the rotation angle of the first curved plate 12021a in the first curved slide 1201a.

[0078] In the process of the first curved plate 12021a sliding in the first curved slide 1201a, by designing the first limiting structure 12021b on the first curved plate 12021a, the first limiting structure 12021b can be prevented from falling out of the first curved slide 1201a, thereby ensuring the rotation reliability of the first rotating part 1202 and the fixed base 1201. Figure 6 It is used to indicate that the first connecting rod 12021 does not slide in the first arc-shaped slideway 1201a. In this case, the flexible display module 20 is in a flattened state. Figure 7 It is used to indicate that the first connecting rod 12021 slides to the target position in the first arc-shaped slideway 1201a. In this case, the flexible display module 20 is in a folded state.

[0079] Correspondingly, the second connecting rod 12031 further includes a second limiting structure (not shown in the figure) located on a side of the second curved plate 12031a away from the second end of the second connecting rod 12031. The second limiting structure is used to limit the rotation angle of the second curved plate 12031a in the second curved slide 1201b. The second limiting structure is similar to the first limiting structure 12021b, and the embodiment of the present application does not use a separate illustration in the drawings.

[0080] In which, when the second arc plate 12031a slides in the second arc slide 1201b, a second limiting structure is designed on the second arc plate 12031a to prevent the second limiting structure from falling out of the second arc slide 1201b, thereby ensuring the rotation reliability of the second rotating part 1203 and the fixed base 1201.

[0081] It should be noted that the reference Figure 8 , the first curved plate 12021a and the second curved plate 12031a do not need to be designed with a limiting structure. The reason is that when the first rotating part 1202 and the second rotating part 1203 rotate to the target position, the flexible display module 20 is located between the first rotating part 1202 and the second rotating part 1203, so the rotation of the curved plate in the curved slide has reached the rotation limit. If the curved plate needs to be rotated, it can only be rotated into the curved slide, and will not rotate in the direction of falling out of the curved slide.

[0082] Combination Figure 4 ,as well as Figures 6 to 8 , the second end of the first connecting rod 12021 has a first through hole 12021c. The first connecting member 12022 is a strip structure, and the first position of the first connecting member 12022 has a first connecting hole 12022a. The rotating hinge 12 also includes a first screw 1204, and the first screw 1204 passes through the first through hole 12021c and is connected to the first connecting hole 12022a. The first position is located between the first end and the second end of the first connecting member 12022.

[0083] That is, the first connecting rod 12021 and the first connecting member 12022 in the embodiment of the present application are connected by the first screw 1204, so that when the first curved plate 12021a at the first end of the first connecting rod 12021 slides in the first curved slide 1201a, the first connecting member 12022 connected to the first connecting rod 12021 is driven to rotate relative to the fixed base 1201, thereby realizing the rotation of the first rotating part 1202 relative to the fixed base 1201.

[0084] In addition, the second end of the second connecting rod 12031 has a second through hole 12031c. The second connecting member 12032 is a strip structure, and the second position of the second connecting member 12032 has a second connecting hole 12032a. The rotating hinge 12 also includes a second screw 1205, and the second screw 1205 passes through the second through hole 12031c and is connected to the second connecting hole 12032a. The second position is located between the first end and the second end of the second connecting member 12032.

[0085] That is, the second connecting rod 12031 and the second connecting member 12032 in the embodiment of the present application are connected by the second screw 1205, so that when the second arc plate 12031a at the first end of the second connecting rod 12031 slides in the second arc slide 1201b, the second connecting member 12032 connected to the second connecting rod 12031 is driven to rotate relative to the fixed base 1201, thereby realizing the rotation of the second rotating part 1203 relative to the fixed base 1201.

[0086] It should be noted that, since the first curved slide 1201a and the second curved slide 1201b are staggered in the direction of the central axis AA of the fixed base 1201, the first connecting rod 12021 and the second connecting rod 12031 correspondingly connected to the first curved slide 1201a and the second curved slide 1201b are also staggered in the direction of the central axis AA of the fixed base 1201. Therefore, the first position of the first connecting hole 12022a and the second position of the second connecting hole 12032a are also staggered in the direction of the central axis AA of the fixed base 1201.

[0087] In the examples of this application, refer to Fig. 9 , the first end of the first connecting member 12022 has a first arc-shaped connecting groove 12022b, and the side surface of the second supporting plate 112 includes a first plate body 1121 and a first arc-shaped connecting protrusion 1122 located on the first plate body 1121. The first arc-shaped connecting protrusion 1122 is located in the first arc-shaped connecting groove 12022b and can rotate in the first arc-shaped connecting groove 12022b. In this way, the first rotating part 1202 and the second supporting plate 112 can be connected, so that when the first rotating part 1202 rotates, the second supporting plate 112 is driven to rotate.

[0088] In addition, the first end of the second connecting member 12032 has a second arc-shaped connecting groove 12032b, and the side surface of the third supporting plate 113 includes a second plate body 1131 and a second arc-shaped connecting protrusion 1132 located on the second plate body 1131. The second arc-shaped connecting protrusion 1132 is located in the second arc-shaped connecting groove 12032b and can rotate in the second arc-shaped connecting groove 12032b. In this way, the second rotating part 1203 and the third supporting plate 113 can be connected, so that when the second rotating part 1203 rotates, the third supporting plate 113 is driven to rotate.

[0089] refer to Figure 4 The rotating hinge 12 further includes a gear set 1206. The gear set 1206 includes a first gear structure 12061 and a second gear structure 12062. The first end of the first gear structure 12061 has a first clamping portion 12061a. Fig.10 The first clamping portion 12061a includes a first clamping member a1 and a second clamping member a2 which are arranged opposite to each other with a gap. The first clamping member a1 has a third through hole a11, and the second clamping member a2 has a fourth through hole a21.

[0090] And, reference Fig.11 The second end of the first connecting member 12022 of the first rotating part 1202 includes a second clamping portion 12022c, and the second clamping portion 12022c has a first arc-shaped through hole b1. The rotating hinge 12 also includes a first connecting pin 1207, and the second clamping portion 12022c is located between the first clamping member a1 and the second clamping member a2. The first connecting pin 1207 passes through the third through hole a11 of the first clamping member a1, the first arc-shaped through hole b1 of the second clamping portion 12022c, and the fourth through hole a21 of the second clamping member a2 in sequence. Through this design, the first connecting pin 1207 can slide in the first arc-shaped through hole b1, mainly to adjust the rotation angle of the first gear structure 12061 and the first rotating part 1202 to be asynchronous, so as to achieve the reliability of rotation.

[0091] It should be noted that the second clamping portion 12022c of the first rotating portion 1202 and the structure where the first connecting hole 12022a is located are integrally formed (with a certain connection), and the structure where the second clamping portion 12022c and the first connecting hole 12022a are located has a gap, which is provided for the clamping part (a1 or a2) of the first gear structure 12061 to be clamped.

[0092] In the embodiment of the present application, the first connecting pin 1207 is interference fit with the third through hole a11 and the fourth through hole a21, and the first connecting pin 1207 is clearance fit with the first arc-shaped through hole b1. That is, the connection between the first connecting pin 1207 and the two clamping parts in the first gear structure 12061 is tight, and the connection between the first connecting pin 1207 and the first arc-shaped through hole b1 is loose, so that the first gear structure 12061 can drive the first connecting pin 1207 to slide in the first arc-shaped through hole b1. In addition, since the first connecting pin 1207 is interference fit with the third through hole a11 and the fourth through hole a21, the first connecting pin 1207 does not need to be fixed by a nut after passing through.

[0093] Correspondingly, the first end of the second gear structure 12062 has a third clamping portion 12062a. The third clamping portion 12062a includes a third clamping member and a fourth clamping member (not marked in the figure) that are arranged opposite to each other with a gap. The third clamping member has a fifth through hole, and the fourth clamping member has a sixth through hole.

[0094] Furthermore, the second end of the second connecting member 12032 of the second rotating part 1203 includes a fourth clamping portion 12032c, and the fourth clamping portion 12032c has a second arc-shaped through hole. The rotating hinge 12 also includes a second connecting pin 1208, and the fourth clamping portion 12032c is located between the third clamping member and the fourth clamping member. The second connecting pin 1208 passes through the fifth through hole of the third clamping member, the second arc-shaped through hole of the fourth clamping portion 12032c, and the sixth through hole of the fourth clamping member in sequence. Through this design, the second connecting pin 1208 can slide in the second arc-shaped through hole, mainly to adjust the rotation angle of the second gear structure 12062 and the second rotating part 1203 to be asynchronous, so as to achieve the reliability of rotation.

[0095] It should be noted that the second clamping portion 12032c of the second rotating portion 1203 and the structure where the first connecting hole 12032a is located are integrally formed (with a certain connection), and the second clamping portion 12032c and the structure where the first connecting hole 12032a is located have a gap, which is used for the clamping part of the second gear structure 12062 to clamp.

[0096] Among them, the second connecting pin 1208 is an interference fit with the fifth through hole and the sixth through hole, and the second connecting pin 1208 is a clearance fit with the second arc-shaped through hole. That is, the connection between the second connecting pin 1208 and the two clamping parts in the second gear structure 12062 is relatively tight, and the connection between the first connecting pin 1207 and the second arc-shaped through hole is relatively loose, so that the second gear structure 12062 can drive the second connecting pin 1208 to slide in the second arc-shaped through hole. In addition, since the second connecting pin 1208 is an interference fit with the fifth through hole and the sixth through hole, the second connecting pin 1208 does not need to be fixed by a nut after passing through.

[0097] refer to Figure 4 The gear set 1206 further includes: a first gear 12063 and a second gear 12064 located between the first gear structure 12061 and the second gear structure 12062. The first gear 12063 and the second gear 12064 are meshed with each other.

[0098] And, referring to FIGS. 12 and Fig.13 , the second end of the first gear structure 12061 has a first gear portion 12061b, and the first gear portion 12061b is meshed with the first gear 12063. The second end of the second gear structure 12062 has a second gear portion 12062b, and the second gear portion 12062b is meshed with the second gear 12064. Therefore, when the flexible display module 20 is folded, the first gear 12063 and the second gear 12064 rotate due to meshing, and at the same time, the first gear 12063 and the first gear portion 12061b, and the second gear 12064 and the second gear portion 12062b also mesh and rotate.

[0099] refer to Fig.12 , if the first gear structure 12061 and the second gear structure 10262 have a certain rotation angle, the first connecting pin 1207 is located in the middle of the first arc-shaped through hole b1, and the second connecting pin is located in the middle of the second arc-shaped through hole. Fig.13 , if the first gear structure 12061 and the second gear structure 10262 rotate to the target position (the position when the flexible display module is folded), the first connecting pin 1207 is located at one end of the first arc-shaped through hole b1, and the second connecting pin is located at one end of the second arc-shaped through hole. That is, as the gear structure rotates, the position of the connecting pin in the arc-shaped through hole can change.

[0100] In the embodiment of the present application, Figure 4 and Fig.10 The first side of the first gear structure 12061 has a first concave-convex portion 12061c, and the first side of the second gear structure 12062 has a second concave-convex portion 12062c. Figure 4 and Fig.13 The rotating hinge 12 further includes: a connecting wheel set 1209. The connecting wheel set 1209 includes a connecting rod 12091, and a third concave-convex portion 12092 and a fourth concave-convex portion 12093 respectively connected to both ends of the connecting rod 12091. The third concave-convex portion 12092 and the first concave-convex portion 12061c are meshed with each other, and the fourth concave-convex portion 12093 and the second concave-convex portion 12062c are meshed with each other.

[0101] Each of the concave-convex parts has a concave part and a convex part. When the flexible display module 20 is in a flattened state, the two concave-convex parts meshing with each other, the concave part of one concave-convex part meshing with the convex part of the other concave-convex part. When the flexible display module 20 gradually transitions from the flattened state to the folded state, the concave-convex part on the gear structure will rotate relative to the concave-convex part in the connecting wheel set 1209. This may cause the two convex parts of the two meshing concave-convex parts to be opposite to each other, and then the distance between the connecting wheel set 1209 and the gear set 1206 can be adjusted.

[0102] Optionally, the first concave-convex portion 12061c has a seventh through hole e1, and the second concave-convex portion 12062c has an eighth through hole f1. The first gear 12063 has a ninth through hole g1, and the second gear 12064 has a tenth through hole h1. The rotating hinge 12 also includes: a third connecting pin 1210, a fourth connecting pin 1211, a fifth connecting pin 1212, a sixth connecting pin 1213, a double-connected circlip 1214, and a quadruple-connected circlip 1215.

[0103] The first end of the third connecting pin 1210 has a first snap-fit ​​groove, and the first end of the third connecting pin 1210 passes through the seventh through hole e1. After the third connecting pin 1210 passes through the seventh through hole e1, the first snap-fit ​​groove can be located on the second side of the first gear structure 12061, that is, the side without the concave-convex portion.

[0104] The first end of the fourth connecting pin 1211 has a second snap-fitting groove, and the first end of the fourth connecting pin 1211 passes through the eighth through hole f1. After the fourth connecting pin 1211 passes through the eighth through hole f1, the second snap-fitting groove can be located on the second side of the second gear structure 12062, that is, the side without the concave-convex portion.

[0105] The first end of the fifth connecting pin 1212 has a third engaging groove, and the second end has a fourth engaging groove. The fifth connecting pin 1212 passes through the ninth through hole g1, and the third engaging groove and the fourth engaging groove are respectively located on both sides of the first gear 12063.

[0106] The first end of the sixth connecting pin 1213 has a fifth clamping slot, and the second end has a sixth clamping slot. The sixth connecting pin 1213 passes through the tenth through hole h1, and the fifth clamping slot and the sixth clamping slot are respectively located on both sides of the second gear 12064.

[0107] The double-linked retaining spring 1214 is engaged with the third engaging groove and the fifth engaging groove. The quadruple-linked retaining spring 1215 is engaged with the first engaging groove, the fourth engaging groove, the sixth engaging groove and the second engaging groove in sequence. That is, the first side of the first gear 12063 and the first side of the second gear 12064 are engaged through the double-linked retaining spring 1214, and the second side of the first gear structure 12061, the second side of the first gear 12063, the second side of the second gear 12064 and the second side of the first gear structure 12061 are engaged through the quadruple-linked retaining spring 1215. The first side of the first gear 12063 and the first side of the second gear 12064 are both located on the same side as the concave-convex portion of the gear structure.

[0108] refer to Fig.14 The third concave-convex part 12092 has an eleventh through hole i1, and the fourth concave-convex part 12093 has a twelfth through hole j1. The rotating hinge 12 further includes: a first torsion spring 1216, a second torsion spring 1217, a first nut 1218 and a second nut 1219.

[0109] The first torsion spring 1216 is located at the side of the connecting wheel set 1209 away from the gear set 1206, and the second end of the third connecting pin 1210 passes through the eleventh through hole i1 and the first torsion spring 1216 in sequence, and is connected to the first nut 1218. The second torsion spring 1217 is located at the side of the connecting wheel set 1209 away from the gear set 1206, and the second end of the fourth connecting pin 1211 passes through the twelfth through hole j1 and the second torsion spring 1217 in sequence, and is connected to the second nut 1219. By designing the torsion spring and the nut, the torque can be controlled, and the flexible display module 20 can be folded or unfolded.

[0110] In the examples of this application, refer to Fig. 9 One side of the fixed base 1201 includes a first connection block 12011 and a second connection block 12012 which are arranged opposite to each other and have a gap. The first connection block 12011 has a thirteenth through hole k1, and the second connection block 12012 has a fourteenth through hole l1.

[0111] The surface of the second support plate 112 close to the fixed base 1201 has a fifth clamping portion 1123 having a third arc-shaped through hole m1. The surface of the third support plate 113 close to the fixed base 1201 has a sixth clamping portion 1133 having a fourth arc-shaped through hole n1.

[0112] refer to Fig.15The supporting device 10 further includes: a seventh connecting pin (not shown in the figure) and an eighth connecting pin 13. The seventh connecting pin passes through the thirteenth through hole k1 and the third arc-shaped through hole m1, that is, the fixed base 1201 of the rotating hinge 12 and the second supporting plate 112 are connected through the seventh connecting pin. The eighth connecting pin 13 passes through the fourteenth through hole l1 and the fourth arc-shaped through hole n1, that is, the fixed base 1201 of the rotating hinge 12 and the third supporting plate 113 are connected through the eighth connecting pin 13.

[0113] Optionally, the seventh connecting pin and the thirteenth through hole k1 are interference fit, and the seventh connecting pin and the third arc-shaped through hole m1 are clearance fit. That is, the seventh connecting pin is tightly connected to the fixed base 1201, and the seventh connecting pin is loosely connected to the third arc-shaped through hole m1, so that when the flexible display module 20 is folded, the seventh connecting pin can slide in the third arc-shaped through hole m1. In addition, the eighth connecting pin 13 and the fourteenth through hole l1 are interference fit, and the eighth connecting pin 13 and the fourth arc-shaped through hole n1 are clearance fit. That is, the eighth connecting pin 13 and the fixed base 1201 are tightly connected, and the eighth connecting pin 13 and the fourth arc-shaped through hole n1 are loosely connected, so that when the flexible display module 20 is folded, the eighth connecting pin 13 can slide in the fourth arc-shaped through hole n1. Among them, since the seventh connecting pin and the thirteenth through hole k1 are interference fit, the seventh connecting pin does not need to be fixed by a nut after passing through the thirteenth through hole k1 and the third arc-shaped through hole m1. The eighth connecting pin 13 and the fourteenth through hole l1 are interference fit, so the eighth connecting pin 13 does not need to be fixed by a nut after passing through the fourteenth through hole l1 and the fourth arc-shaped through hole n1.

[0114] In summary, an embodiment of the present application provides a support device, in which the first support plate and the fourth support plate of the support assembly are used to support the non-bending part of the flexible display module, and the second support plate and the third support plate are used to support the bending part of the flexible display module. Since the first rotating part and the second rotating part of the rotating hinge connected to the support assembly can rotate relative to the fixed base, and the rotation directions are opposite, the folding of the flexible display module can be achieved. In addition, when the flexible display module is folded, the second support plate and the third support plate can be located on both sides of the bending part of the flexible display module, so that after the flexible display module is folded, its folding part can be appropriately sunken, thereby reducing the amount of slippage when the flexible display module is folded, and the folding effect is better.

[0115] The embodiment of the present application further provides a foldable display device, which includes a flexible display module 20 and a supporting device as provided in the above embodiment. The supporting device is located on the non-display surface of the flexible display module 20 and is used to support the flexible display module 20.

[0116] Since the folding display device can have basically the same technical effects as the supporting devices described in the previous embodiments, for the purpose of brevity, the technical effects of the folding display device will not be repeatedly described here.

[0117] It will be understood that, although the terms first and second, etc. may be used to describe various elements, components, regions, layers and / or parts in this article, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another region, layer or part. Therefore, the first element, component, region, layer or part discussed above may be referred to as the second element, component, region, layer or part without departing from the teaching of the present disclosure.

[0118] Spatially relative terms such as "under...", "above...", "left", "right", etc. may be used herein to describe the relationship between an element or feature and another (some) element or feature as illustrated in the figure for ease of description. It will be understood that these spatially relative terms are intended to cover different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is flipped, the element described as "under other elements or features" will be oriented as "above other elements or features". Therefore, the exemplary term "under..." can cover both the orientations of above and below. The device can be oriented in other ways (rotated 90 degrees or in other orientations) and the spatially relative descriptors used in this article are interpreted accordingly. In addition, it will also be understood that when a layer is referred to as "between two layers", it can be the only layer between the two layers, or one or more intermediate layers may also be present.

[0119] The terms used herein are only for the purpose of describing a specific embodiment and are not intended to limit the present disclosure. As used herein, the singular forms "one", "one" and "the" are intended to also include plural forms, unless the context clearly indicates otherwise. It will be further understood that the terms "include" and / or "comprise" specify the existence of the features, integral bodies, steps, operations, elements and / or parts when used in this specification, but do not exclude the existence of one or more other features, integral bodies, steps, operations, elements, parts and / or its groups or add one or more other features, integral bodies, steps, operations, elements, parts and / or its groups. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. In this specification, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples without contradicting each other.

[0120] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present disclosure belongs. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the relevant art and / or the context of this specification, and will not be interpreted in an idealized or overly formal sense, unless explicitly defined as such herein.

[0121] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A supporting device, characterized in that: The support device (10) is used to support a flexible display module (20), wherein the flexible display module (20) comprises a bending portion (20a) and a first non-bending portion (20b) and a second non-bending portion (20c) located on both sides of the bending portion (20a); the support device (10) comprises: A support assembly (11), comprising a first support plate (111), a second support plate (112), a third support plate (113), and a fourth support plate (114) connected in sequence, wherein the first support plate (111) is used to support the first non-bending portion (20b), the second support plate (112) and the third support plate (113) are used to support the bending portion (20a), and the fourth support plate (114) is used to support the second non-bending portion (20c); and a rotating hinge (12), the rotating hinge (12) comprising a fixed base (1201), and a first rotating part (1202) and a second rotating part (1203) rotatably connected to the fixed base (1201), the orthographic projection of the axis of the fixed base (1201) on the support assembly (11) overlaps with a boundary line between the second support plate (112) and the third support plate (113), the first rotating part (1202) is connected to the second support plate (112), and the second rotating part (1203) is rotatably connected to the fixed base (1201). The first rotating portion (1202) and the second rotating portion (1203) are connected to the third supporting plate (113), the rotation direction of the first rotating portion (1202) relative to the fixed base (1201) is opposite to the rotation direction of the second rotating portion (1203) relative to the fixed base (1201), and when the first rotating portion (1202) and the second rotating portion (1203) are rotated to a target position, the second supporting plate (112) and the third supporting plate (113) are located on both sides of the bent portion (20a) of the flexible display module (20); The target position is the position of the first rotating part (1202) and the second rotating part (1203) when the flexible display module (20) is folded, and the flexible display module (20) is folded along the boundary line between the second support plate (112) and the third support plate (113); One side of the fixed base (1201) comprises a first connection block (12011) and a second connection block (12012) which are arranged opposite to each other and have a gap therebetween, the first connection block (12011) having a thirteenth through hole (k1), and the second connection block (12012) having a fourteenth through hole (l1); The surface of the second support plate (112) close to the fixed base (1201) has a fifth clamping portion (1123), the fifth clamping portion (1123) has a third arc-shaped through hole (m1), and the surface of the third support plate (113) close to the fixed base (1201) has a sixth clamping portion (1133), the sixth clamping portion (1133) has a fourth arc-shaped through hole (n1); The supporting device (10) further comprises: a seventh connecting pin and an eighth connecting pin (13), the seventh connecting pin passing through the thirteenth through hole (k1) and the third arc-shaped through hole (m1), and the eighth connecting pin (13) passing through the fourteenth through hole (l1) and the fourth arc-shaped through hole (n1); The seventh connecting pin shaft and the thirteenth through hole (k1) are in interference fit, and the seventh connecting pin shaft and the third arc-shaped through hole (m1) are in clearance fit; The eighth connecting pin shaft (13) and the fourteenth through hole (l1) are in an interference fit, and the eighth connecting pin shaft (13) and the fourth arc-shaped through hole (n1) are in a clearance fit.

2. The support device according to claim 1, characterized in that: The first rotating part (1202) comprises a first connecting rod (12021) and a first connecting member (12022); the first end of the first connecting rod (12021) is rotatably connected to the fixed base (1201); the second end of the first connecting rod (12021) is fixedly connected to the first connecting member (12022); the first connecting member (12022) is rotatably connected to the second support plate (112); and the first connecting member (12022) is fixedly connected to the first support plate (111); The second rotating part (1203) comprises a second connecting rod (12031) and a second connecting member (12032), wherein the first end of the second connecting rod (12031) is rotatably connected to the fixed base (1201), the second end of the second connecting rod (12031) is fixedly connected to the second connecting member (12032), the second connecting member (12032) is rotatably connected to the third support plate (113), and the second connecting member (12032) is fixedly connected to the fourth support plate (114).

3. The supporting device according to claim 2, characterized in that: The fixed base (1201) has a first curved slideway (1201a) and a second curved slideway (1201b); the first end of the first connecting rod (12021) is a first curved plate (12021a), and the first end of the second connecting rod (12031) is a second curved plate (12031a); The first arc-shaped plate (12021a) is located in the first arc-shaped slide (1201a) and is used for sliding in the first arc-shaped slide (1201a); and the second arc-shaped plate (12031a) is located in the second arc-shaped slide (1201b) and is used for sliding in the second arc-shaped slide (1201b).

4. The supporting device according to claim 3, characterized in that: The first connecting rod (12021) further comprises a first limiting structure (12021b) located on a side of the first curved plate (12021a) away from the second end of the first connecting rod (12021), the first limiting structure (12021b) being used to limit the rotation angle of the first curved plate (12021a) in the first curved slideway (1201a); The second connecting rod (12031) further comprises a second limiting structure (12031b) located on a side of the second arc-shaped plate (12031a) away from the second end of the second connecting rod (12031), wherein the second limiting structure (12031b) is used to limit the rotation angle of the second arc-shaped plate (12031a) in the second arc-shaped slideway (1201b).

5. The supporting device according to claim 2, characterized in that: The second end of the first connecting rod (12021) has a first through hole (12021c); the first connecting member (12022) is a strip-shaped structure; the first position of the first connecting member (12022) has a first connecting hole (12022a); the first position is located between the first end and the second end of the first connecting member (12022); the rotary hinge (12) further comprises: a first screw (1204); the first screw (1204) passes through the first through hole (12021c) and is connected to the first connecting hole (12022a); The second end of the second connecting rod (12031) has a second through hole (12031c), the second connecting member (12032) is a bar structure, the second connecting member (12032) is a bar structure, the second position of the second connecting member (12032) has a second connecting hole (12032a), and the second position is located between the first end and the second end of the second connecting member (12032); the rotating hinge (12) further includes: a second screw (1205), the second screw (1205) passes through the second through hole (12031c) and is connected to the second connecting hole (12032a).

6. The supporting device according to claim 5, characterized in that: The first end of the first connecting member (12022) has a first arc-shaped connecting groove (12022b), the side surface of the second supporting plate (112) comprises a first plate body (1121) and a first arc-shaped connecting protrusion (1122) located on the first plate body (1121), the first arc-shaped connecting protrusion (1122) is located in the first arc-shaped connecting groove (12022b), and is capable of rotating in the first arc-shaped connecting groove (12022b); The first end of the second connecting member (12032) has a second arc-shaped connecting groove (12032b), and the side surface of the third supporting plate (113) includes a second plate body (1131) and a second arc-shaped connecting protrusion (1132) located on the second plate body (1131), and the second arc-shaped connecting protrusion (1132) is located in the second arc-shaped connecting groove (12032b) and can rotate in the second arc-shaped connecting groove (12032b).

7. The supporting device according to claim 5, characterized in that: The rotary hinge (12) further comprises: a gear set (1206); the gear set (1206) comprises: a first gear structure (12061) and a second gear structure (12062); The first end of the first gear structure (12061) has a first clamping portion (12061a), the first clamping portion (12061a) includes a first clamping member (a1) and a second clamping member (a2) that are arranged opposite to each other with a gap, the first clamping member (a1) has a third through hole (a11), the second clamping member (a2) has a fourth through hole (a21), the second end of the first connecting member (12022) includes a second clamping portion (12022c), the second clamping portion (12022 c) having a first arc-shaped through hole (b1); the rotary hinge (12) further comprises: a first connecting pin (1207), the second clamping portion (12022c) being located between the first clamping member (a1) and the second clamping member (a2), the first connecting pin (1207) sequentially passing through the third through hole (a11) of the first clamping member (a1), the first arc-shaped through hole (b1) of the second clamping portion (12022c) and the fourth through hole (a21) of the second clamping member (a2); The first end of the second gear structure (12062) has a third clamping portion (12062a), the second clamping portion (12062a) includes a third clamping member and a fourth clamping member that are arranged opposite to each other with a gap, the third clamping member has a fifth through hole, and the fourth clamping member has a sixth through hole, the second end of the second connecting member (12032) includes a fourth clamping portion (12032c), and the fourth clamping portion (12032c) has a second arc-shaped through hole; the rotating hinge (12) further includes: a second connecting pin (1208), the fourth clamping portion (12032c) is located between the third clamping member and the fourth clamping member, and the second connecting pin (1208) passes through the fifth through hole of the third clamping member, the second arc-shaped through hole of the fourth clamping member (12032c) and the sixth through hole of the fourth clamping member in sequence.

8. The supporting device according to claim 7, characterized in that: The first connecting pin (1207) is in interference fit with the third through hole (a11) and the fourth through hole (a21), and the first connecting pin (1207) is in clearance fit with the first arc-shaped through hole (b1); The second connecting pin (1208) is in interference fit with the fifth through hole and the sixth through hole, and the first connecting pin (1207) is in clearance fit with the second arc-shaped through hole.

9. The supporting device according to claim 7, characterized in that: The gear set (1206) further comprises: a first gear (12063) and a second gear (12064) located between the first gear structure (12061) and the second gear structure (12062), the first gear (12063) and the second gear (12064) being meshed with each other; The second end of the first gear structure (12061) has a first gear portion (12061b), and the first gear portion (12061b) is meshed with the first gear (12063); the second end of the second gear structure (12062) has a second gear portion (12062b), and the second gear portion (12062b) is meshed with the second gear (12064).

10. The supporting device according to claim 9, characterized in that: The first side of the first gear structure (12061) has a first concavo-convex portion (12061c), and the first side of the second gear structure (12062) has a second concavo-convex portion (12062c); the rotary hinge (12) further comprises: a connecting wheel set (1209); the connecting wheel set (1209) comprises: a connecting rod (12091), and a third concavo-convex portion (12092) and a fourth concavo-convex portion (12093) respectively connected to two ends of the connecting rod (12091); The third concave-convex portion (12092) and the first concave-convex portion (12061c) are meshed with each other, and the fourth concave-convex portion (12093) and the second concave-convex portion (12062c) are meshed with each other.

11. The support device according to claim 10, characterized in that: The first concave-convex portion (12061c) has a seventh through hole (e1), the second concave-convex portion (12062c) has an eighth through hole (f1), the first gear (12063) has a ninth through hole (g1), and the second gear (12064) has a tenth through hole (h1); the rotary hinge (12) further comprises: a third connecting pin (1210), a fourth connecting pin (1211), a fifth connecting pin (1212), a sixth connecting pin (1213), a double-connected retaining spring (1214), and a quadruple-connected retaining spring (1215); The first end of the third connecting pin shaft (1210) has a first clamping groove, the first end of the third connecting pin shaft (1210) passes through the seventh through hole (e1), and the first clamping groove is located on the second side of the first gear structure (12061); The first end of the fourth connecting pin shaft (1211) has a second clamping groove, the first end of the fourth connecting pin shaft (1211) passes through the eighth through hole (f1), and the second clamping groove is located on the second side of the second gear structure (12062); The first end of the fifth connecting pin shaft (1212) has a third clamping groove, and the second end has a fourth clamping groove, the fifth connecting pin shaft (1212) passes through the ninth through hole (g1), and the third clamping groove and the fourth clamping groove are respectively located on both sides of the first gear (12063); The first end of the sixth connecting pin shaft (1213) has a fifth clamping groove, and the second end has a sixth clamping groove, the sixth connecting pin shaft (1213) passes through the tenth through hole (h1), and the fifth clamping groove and the sixth clamping groove are respectively located on both sides of the second gear (12064); The double-connected clamping spring (1214) is clamped with the third clamping slot and the fifth clamping slot, and the quadruple-connected clamping spring (1215) is sequentially clamped with the first clamping slot, the fourth clamping slot, the sixth clamping slot and the second clamping slot.

12. The supporting device according to claim 11, characterized in that: The third concave-convex portion (12092) has an eleventh through hole (i1), and the fourth concave-convex portion (12093) has a twelfth through hole (j1); the rotary hinge (12) further comprises: a first torsion spring (1216), a second torsion spring (1217), a first nut (1218) and a second nut (1219); The first torsion spring (1216) is located on a side of the connecting wheel set (1209) away from the gear set (1206), and the second end of the third connecting pin shaft (1210) passes through the eleventh through hole (i1) and the first torsion spring (1216) in sequence, and is connected to the first nut (1218); The second torsion spring (1217) is located on a side of the connecting wheel set (1209) away from the gear set (1206), and the second end of the fourth connecting pin shaft (1211) passes through the twelfth through hole (j1) and the second torsion spring (1217) in sequence, and is connected to the second nut (1219).

13. A foldable display device, characterized in that: The foldable display device comprises: a flexible display module (20) and a supporting device (10) according to any one of claims 1 to 12; Wherein, the supporting device (10) is located on the non-display surface of the flexible display module (20) and is used to support the flexible display module (20).

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