Rotating shaft assembly and foldable electronic equipment

Abstract

The invention relates to the field of electronic equipment, aims to solve the problem of relatively weak impact resistance of a rotating shaft assembly in the prior art, and provides a rotating shaft assembly and foldable electronic equipment. The rotating shaft assembly comprises a middle beam and a plurality of supporting mechanisms. The multiple supporting mechanisms are distributed on the two sides of the middle beam. The supporting mechanism comprises a connecting block and one or more swing arm assemblies, and the swing arm assemblies are connected between the middle beam and the connecting block. The swing arm assembly comprises a first swing arm and a second swing arm, one end of the first swing arm is rotatably connected to the middle beam, and the other end of the first swing arm is rotatably connected to the connecting block. The end, close to the middle beam, of the second swing arm is rotationally connected to the middle beam. Wherein the end, close to the connecting block, of the second swing arm is connected with the connecting block, and when the rotating shaft assembly is in the folded state and / or the unfolded state, the second swing arm can abut against the connecting block and / or the first swing arm in the direction away from the middle beam. The rotating shaft assembly has the beneficial effects that the second swing arm can provide supporting force for the connecting block, and the impact resistance of the rotating shaft assembly is high.

Description

Technical Field

[0001] This application relates to the field of electronic devices, and more specifically, to hinge assemblies and foldable electronic devices. Background Technology

[0002] Foldable electronic devices, such as foldable phones, use a hinge assembly to enable relative rotation between adjacent components, allowing the foldable electronic device to be folded or unfolded.

[0003] In related technologies, some swing arms (such as secondary swing arms) of the pivot assembly are in sliding fit with the connecting block. When an external force (such as the impact force generated by the drop of an electronic device) is applied, the connecting block will slide relative to these swing arms. That is, these swing arms cannot provide effective support for the connecting block, which limits the impact resistance of the pivot assembly. Summary of the Invention

[0004] This application provides a hinge assembly and a foldable electronic device to address the problem that the hinge assembly of related technologies has relatively weak impact resistance.

[0005] In a first aspect, embodiments of this application also provide a pivot assembly, which includes a central beam and multiple support mechanisms. The multiple support mechanisms are distributed on both sides of the central beam. Each support mechanism includes a connecting block and one or more swing arm assemblies, the swing arm assemblies being connected between the central beam and the connecting block. Each swing arm assembly includes a first swing arm and a second swing arm. One end of the first swing arm is rotatably connected to the central beam, and the other end is rotatably connected to the connecting block. The end of the second swing arm near the central beam is rotatably connected to the connecting block. The end of the second swing arm near the connecting block is connected to the connecting block, and when the pivot assembly is in a folded state and / or an unfolded state, the second swing arm can abut against the connecting block and / or the first swing arm in a direction away from the central beam.

[0006] In this embodiment, the second swing arm of the rotating shaft assembly can support the connecting block or the connecting block can be supported by the first swing arm, thereby improving the impact resistance of the rotating shaft assembly.

[0007] In one possible implementation, the connecting block is provided with a second arcuate groove, and the second arcuate groove has a second arcuate slot. The second swing arm is provided with a second pin, and the second pin and the second arcuate groove form a sliding and rotatable high-pair fit.

[0008] In this embodiment, the second swing arm can support the connecting block by cooperating with the second arc groove.

[0009] In one possible implementation, the second arcuate groove is circumferentially closed, making the second arcuate groove a closed groove. The second pin extends into the second arcuate groove along the axial direction of the rotating shaft assembly and is confined between the two ends of the second arcuate groove in its extending direction.

[0010] In this embodiment, the second swing arm can abut against the second arc groove at both ends in the extension direction of the second arc groove to realize the transmission of force between the second swing arm and the connecting block.

[0011] In one possible implementation, the second arc-shaped groove is a strip-shaped groove extending along an arc; the second arc-shaped groove includes an inner groove surface, an outer groove surface, a top groove surface, and a bottom groove surface; the bottom groove surface is located at one end of the second arc-shaped groove extending towards the center beam, and the top groove surface is located at one end of the second arc-shaped groove extending away from the center beam; the inner groove surface and the outer groove surface are spaced apart from each other and respectively connected between the top groove surface and the bottom groove surface, and when the hinge assembly is in the folded state, the inner groove surface is located on the side of the outer groove surface near the surface of the hinge assembly used to support the folded screen. Wherein, when the hinge assembly is in the folded state, the second pin is located at one end of the second arc-shaped groove near the bottom groove surface and abuts against the inner groove surface in a direction away from the center beam; and / or, when the hinge assembly is in the unfolded state, the second pin is located at one end of the second arc-shaped groove near the top groove surface and abuts against the top groove surface in a direction away from the center beam.

[0012] In this embodiment, the second pin can support the second arc groove when the shaft assembly is in a folded or unfolded state, thereby improving the impact resistance of the shaft assembly.

[0013] In one possible implementation, when the pivot assembly is in a folded state, the direction of the force between the second pin and the inner groove surface is inclined to intersect with the thickness direction of the middle beam.

[0014] In this embodiment, the inclination of the second pin and the inner groove surface facilitates the transmission of force from the second pin to the second arc groove.

[0015] In one possible implementation, the connecting block has a first groove, which is recessed from one side of the connecting block near the central beam. A second arcuate groove protrudes from the side surface of the first groove.

[0016] In this embodiment, the first groove is designed to accommodate part of the structure of the second swing arm, and the second arc groove protrudes from the side groove surface of the first groove, which is conducive to cooperating with the laterally protruding second pin.

[0017] In one possible implementation, when the pivot assembly is in a folded and / or unfolded state: the second swing arm abuts against or nearly abuts against the side of the first swing arm near the center beam, so that the force on the second swing arm can be transmitted to the first swing arm.

[0018] The phrase "the second swing arm nearly abuts against the first swing arm near the center beam" means that there is only a gap between the second and first swing arms that is less than the allowable distance. This allows the second and first swing arms to only undergo relative displacement of less than the allowable distance when the pivot assembly is subjected to external forces such as falling impacts. In other words, after the allowable relative displacement distance between the second and first swing arms, the gap disappears, allowing the second and first swing arms to abut against each other and transmit the impact force.

[0019] In this embodiment, by having the second swing arm abut or nearly abut the first swing arm, it is beneficial for the second swing arm to transmit the impact force to the first swing arm, thereby improving the impact resistance of the rotating shaft assembly.

[0020] In one possible implementation, the second swing arm and the first swing arm overlap at least partially along the thickness direction. When the pivot assembly is in a folded and / or unfolded state, the overlapping portions of the second and first swing arms abut against each other.

[0021] In this embodiment, by having the second swing arm and the first swing arm overlap and abut against each other, the second swing arm can transmit the impact force to the first swing arm, thereby improving the impact resistance of the rotating shaft assembly.

[0022] In one possible implementation, the second swing arm has a stop on the side of the pivot assembly near the first swing arm along the axial direction. When the pivot assembly is in a folded and / or unfolded state, the stop abuts against the side of the first swing arm near the center beam.

[0023] In this embodiment, by abutting the first swing arm at the top, the second swing arm is able to transmit the impact force to the first swing arm, thereby improving the impact resistance of the rotating shaft assembly.

[0024] In one possible implementation, the first swing arm is provided with a first arcuate groove, and the first arcuate groove has a first arcuate slot. The second swing arm is provided with a first pin, and the first pin and the first arcuate groove form a sliding and rotatable high-pair fit.

[0025] In this embodiment, the first pin can support the first arc groove when the shaft assembly is in a folded state or an unfolded state, thereby improving the impact resistance of the shaft assembly.

[0026] In one possible implementation, the first arcuate groove is circumferentially closed, making the first arcuate groove a closed groove. The first pin extends into the first arcuate groove along the axial direction of the shaft assembly and is confined between the two ends of the first arcuate groove in its extending direction.

[0027] In this embodiment, the first swing arm can abut against the first arc groove at both ends in the extension direction of the first arc groove to realize the transmission of force between the first swing arm and the connecting block.

[0028] In one possible implementation, the first arc-shaped groove is a strip-shaped groove extending along an arc; the first arc-shaped groove includes an inner groove surface, an outer groove surface, a top groove surface, and a bottom groove surface; the bottom groove surface is located at the end of the first arc-shaped groove extending towards the center beam, and the top groove surface is located at the end of the first arc-shaped groove extending away from the center beam; the inner groove surface and the outer groove surface are spaced apart from each other and respectively connected between the top groove surface and the bottom groove surface, and when the hinge assembly is in the folded state, the inner groove surface is located on the side of the outer groove surface near the surface of the hinge assembly used to support the folded screen. Wherein, when the hinge assembly is in the folded state, the first pin is located at the end of the first arc-shaped groove near the bottom groove surface and abuts against the inner groove surface in a direction away from the center beam; and / or, when the hinge assembly is in the unfolded state, the first pin is located at the end of the first arc-shaped groove near the top groove surface and abuts against the top groove surface in a direction away from the center beam.

[0029] In this embodiment, the first pin can support the first arc groove when the shaft assembly is in a folded state or an unfolded state, thereby improving the impact resistance of the shaft assembly.

[0030] In one possible implementation, the second swing arm has a top abutment. The first swing arm has a first abutment surface and a second abutment surface, the first abutment surface being located on the side of the second abutment surface near the center beam. When the pivot assembly is in the folded state, the top abutment abuts against the first abutment surface. When the pivot assembly is in the unfolded state, the top abuts against the second abutment surface.

[0031] In this embodiment, by abutting the top against the first abutting surface or the second abutting surface, the second swing arm can transmit the impact force to the first swing arm, thereby improving the impact resistance of the rotating shaft assembly.

[0032] In one possible implementation, the first swing arm has a first side surface adjacent to the second swing arm along the axial direction of the pivot assembly, and the second swing arm has a second side surface adjacent to the first swing arm along the axial direction of the pivot assembly. A recessed section of the first side surface near the center beam forms a clearance groove, and the groove side facing the center beam is a first abutment surface. The second side surface protrudes towards the first swing arm to form a top abutment. The first swing arm also has a mating portion located on the side of the top abutment away from the center beam, and has a second abutment surface facing the center beam. When the pivot assembly is in a folded state, the top abutment engages with the clearance groove and abuts against the first abutment surface. When the pivot assembly is in an unfolded state, the top abutment is displaced to the side stacked on the thickness direction of the first swing arm and abuts against the second abutment surface.

[0033] In this embodiment, by abutting the first swing arm with the top, the second swing arm can transmit the impact force to the first swing arm through the top and the first pin, thereby improving the impact resistance of the rotating shaft assembly.

[0034] In one possible implementation, the mating part is a first arcuate groove, which has a first arcuate groove. The second swing arm has a first pin, which protrudes from the second side and extends into the first arcuate groove. The first pin and the first arcuate groove form a sliding and rotatable high-pair fit.

[0035] In this embodiment, the first arc groove, which serves as the mating part, can simultaneously abut against the top of the second swing arm and against the first pin, further improving the path of force transmission from the second swing arm to the first swing arm and enhancing the impact resistance of the rotating shaft assembly.

[0036] In one possible implementation, the first arc-shaped groove is a strip-shaped groove extending along an arc; the first arc-shaped groove includes an inner groove surface, an outer groove surface, a top groove surface, and a bottom groove surface; the bottom groove surface is located at the end of the first arc-shaped groove extending towards the center beam, and the top groove surface is located at the end of the first arc-shaped groove extending away from the center beam; the inner groove surface and the outer groove surface are spaced apart from each other and respectively connected between the top groove surface and the bottom groove surface, and when the hinge assembly is in the folded state, the inner groove surface is located on the side of the outer groove surface near the surface of the hinge assembly used to support the folded screen. Wherein, when the hinge assembly is in the folded state, the first pin is located at the end of the first arc-shaped groove near the bottom groove surface and abuts against the inner groove surface in a direction away from the center beam; and / or, when the hinge assembly is in the unfolded state, the first pin is located at the end of the first arc-shaped groove near the top groove surface and abuts against the top groove surface in a direction away from the center beam.

[0037] In this embodiment, the first pin can support the first arc groove when the shaft assembly is in a folded state or an unfolded state, thereby improving the impact resistance of the shaft assembly.

[0038] In one possible implementation, when the pivot assembly is in a folded and / or unfolded state, the second swing arm abuts against the connecting block on one side of the pivot assembly along the axial direction away from the center beam, and the second swing arm abuts against the first swing arm on the other side of the pivot assembly along the axial direction away from the center beam.

[0039] In this embodiment, the forces on both sides of the second swing arm are relatively balanced, and it can directly support the connecting block or indirectly support the connecting block through the first swing arm.

[0040] In one possible implementation, the second swing arm and the connecting block form a high-pair fit with two degrees of freedom. The second swing arm and the first swing arm also form a high-pair fit with two degrees of freedom.

[0041] In this embodiment, by replacing the sliding low pair with two high pairs, the rotating shaft assembly as a whole can be ensured to have a unique degree of motion freedom and a driving trajectory.

[0042] In one possible implementation, the second swing arm and the connecting block form a slidable and rotatable higher pair engagement. The second swing arm and the first swing arm also form a slidable and rotatable higher pair engagement.

[0043] In this embodiment, the sliding and rotatable high pair has a degree of freedom of 2, and it is convenient to set the support structure of the second swing arm and the connecting block or the support structure of the second swing arm and the first swing arm.

[0044] In one possible implementation, each support mechanism comprises: two swing arm assemblies, which are spaced apart axially along the pivot assembly, with two first swing arms of each swing arm assembly located outside two second swing arms; the two second swing arms are spaced apart axially along the pivot assembly, and a damping assembly is disposed between the two second swing arms. Each second swing arm has a second sleeve with a second cam portion. The damping assembly includes an elastic element and two sleeve members, each sleeve member having a first cam portion. The elastic element is located between the two sleeve members and elastically presses the first cam portions of the two sleeve members against the second cam portions of the two second swing arms axially along the pivot assembly, thereby providing damping for the rotation of the second swing arms.

[0045] In this embodiment, a damping component is provided between the two second swing arms to provide damping for the rotation of the shaft assembly, thereby improving the user experience.

[0046] In one possible implementation, the second swing arm is provided with a gear section. The rotating shaft assembly also includes a synchronizing gear set. The synchronizing gear set meshes between the gear sections of the second swing arms of the support mechanisms on both sides of the central beam, so that the second swing arms on both sides rotate synchronously.

[0047] In this embodiment, the gear portion of the second swing arm meshes with the synchronous gear set, enabling the two sides of the rotating shaft assembly to rotate synchronously.

[0048] In one possible implementation, the support mechanism further includes a door panel for supporting the foldable screen of a foldable electronic device. The door panel is connected to the connecting block.

[0049] In this embodiment, the door panel can provide support for the folding screen.

[0050] In one possible implementation, the door panel is fixedly connected to the connecting block. Alternatively, the door panel is rotatably connected to the connecting block, and the door panel and the first swing arm form a sliding and rotatable high-pair fit.

[0051] In this embodiment, when the door panel and the connecting block are fixed, their movement trajectories are the same. When the door panel and the connecting block are rotatably connected, the door panel can undergo additional deflection, which helps the door panel support the folding screen at a suitable angle. The high-pair cooperation between the door panel and the first swing arm helps ensure that the movement trajectory of the door panel is determined.

[0052] In one possible implementation, each support mechanism comprises: two swing arm assemblies, which are spaced apart axially along the pivot assembly, with two first swing arms of each swing arm assembly located outside the two second swing arms; a third pin protrudes from the side of each first swing arm opposite to the second swing arm. The door panel includes a panel body and two third arcuate grooves; each third arcuate groove has a third arcuate groove; the two third arcuate grooves are connected to the panel body at intervals. The door panel is rotatably connected to a connecting block, and the third pins of the two first swing arms respectively form a slidable and rotatable high-pair fit with the third arcuate grooves of the two third arcuate grooves.

[0053] In this embodiment, the high-pair fit between the third pin of the first swing arm and the third arc groove of the door panel can also be designed in the same way as the first arc groove and the first pin, so that the first swing arm can provide support for the door panel.

[0054] Secondly, embodiments of this application also provide a foldable electronic device, which includes a first housing, a second housing, a foldable screen, and the aforementioned hinge assembly. The first housing and the second housing are respectively connected to connecting blocks of the support mechanism on both sides of the central beam. The foldable screen is stacked on top of the first housing, the hinge assembly, and the second housing.

[0055] The foldable electronic device of this embodiment uses the aforementioned hinge assembly, which has better drop performance. Attached Figure Description

[0056] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0057] Figure 1 This is a schematic diagram of the structure of the foldable device in the unfolded state according to an embodiment of this application.

[0058] Figure 2 for Figure 1 A schematic diagram of the foldable device in its outward-folded state.

[0059] Figure 3 for Figure 1 A schematic diagram of the foldable device in its inward-folded state.

[0060] Figure 4 An embodiment of the present application shows a rotating shaft assembly in an unfolded state.

[0061] Figure 5 for Figure 4 Enlarged view of point A of the rotating shaft assembly.

[0062] Figure 6 for Figure 5 A 3D view of the rotating shaft assembly.

[0063] Figure 7 for Figure 5 A plan view of the pivot assembly in the folded state.

[0064] Figure 8 for Figure 7 A three-dimensional image.

[0065] Figure 9 This diagram illustrates the switching of the hinge assembly between its unfolded, intermediate, and folded states. The unfolded and folded states are represented by dashed lines, while the intermediate state is represented by a solid line.

[0066] Figure 10 This is an exploded view of the rotating shaft assembly in this embodiment.

[0067] Figure 11 for Figure 10 Another perspective view of the pivot component.

[0068] Figure 12 This is a perspective view of the connection state of the connecting block and the second swing arm in this embodiment.

[0069] Figure 13 for Figure 12 Part of the exploded view.

[0070] Figure 14 for Figure 5 Sectional view along BB line and Figure 7 The combined schematic diagram of the cross-sectional view along line CC mainly shows the support of the second swing arm on the connecting block in the folded and unfolded states of the pivot assembly.

[0071] Figure 15 This is an exploded view of the swing arm assembly in this embodiment.

[0072] Figure 16 This is a perspective view of the swing arm assembly when the pivot assembly is in the deployed state.

[0073] Figure 17 This is a perspective view of the swing arm assembly when the pivot assembly is in the deployed state.

[0074] Figure 18 This is a perspective view of the swing arm assembly when the pivot assembly is in a folded state.

[0075] Figure 19 for Figure 5 Sectional view along DD line and Figure 7The combined schematic diagram of the cross-sectional view along line EE mainly shows the support of the second swing arm on the first swing arm in the folded and unfolded states of the pivot assembly.

[0076] Figure 20 This is a plan view of the hinge assembly in this embodiment, away from the side supporting the folding screen.

[0077] Figure 21 This is a perspective view of the door panel in this embodiment.

[0078] Figure 22 This is a partially exploded view of the rotating shaft assembly in this embodiment.

[0079] Figure 23 This is a simplified structural diagram of the rotating shaft assembly in this embodiment.

[0080] Figure 24 This is an exploded view of the rotating shaft assembly in this embodiment.

[0081] Figure 25 for Figure 24 A schematic diagram of part of the structure.

[0082] Figure 26 This is an exploded view of a portion of the structure of the rotating shaft assembly in this embodiment.

[0083] Figure 27 for Figure 26 An exploded view of part of the structure.

[0084] Figure 28 for Figure 5 Sectional view along line FF.

[0085] Figure 29 for Figure 5 A cross-sectional view along line GG.

[0086] Figure 30 for Figure 26 Another perspective view.

[0087] Figure 31 This is a schematic diagram of another rotating shaft assembly in this embodiment.

[0088] Figure 32 This is a schematic diagram of another rotating shaft assembly in this embodiment.

[0089] Figure 33 This is a structural view of a pivot assembly in a folded state, representing a related technology.

[0090] Figure 34 for Figure 33 The structure view of the pivot component in its unfolded state.

[0091] Figures 1-32Explanation of the main component symbols in the code:

[0092] 100 foldable devices

[0093] Housing assembly 1

[0094] First shell 1a

[0095] Second shell 1b

[0096] Shaft assembly 1c

[0097] Foldable screen 2

[0098] Part 1, 2a

[0099] Part 2b

[0100] Foldable part 2c

[0101] Supporting institution 110

[0102] Swing arm assembly 120

[0103] First swing arm 10

[0104] First arc-shaped sliding tongue 11

[0105] First swing plate 12

[0106] First sleeve 13

[0107] First arc groove 14

[0108] Part 14a

[0109] Third Sales Department 15

[0110] Second swing arm 20

[0111] Second sleeve 21

[0112] Second cam section 21a

[0113] Second swing plate 22

[0114] First Sales Department 23

[0115] Second Sales Department 24

[0116] Reach the top 25

[0117] Gear section 26

[0118] Zhongliang 30

[0119] Foundation beam 31

[0120] Cap beam 32

[0121] First connecting post 32a

[0122] Shaft cover 33

[0123] Second connecting post 33a

[0124] First screw 38

[0125] Second screw 39

[0126] Connector block 40

[0127] Third sleeve 41

[0128] Second arc groove 42

[0129] Reinforcing plate 43

[0130] Door panel 50

[0131] Plate 51

[0132] Second curved sliding tongue 52

[0133] Third arc groove 53

[0134] Damping component 60

[0135] Sleeve 61

[0136] Fourth sleeve 61a

[0137] Connecting sleeve 61b

[0138] First cam section 61c

[0139] Elastic element 62

[0140] 63-piece connector

[0141] First shaft component 71

[0142] Second shaft component 72

[0143] Third shaft component 73 Synchronous gear set 80

[0144] Gear component 81

[0145] First arc groove C1

[0146] Second arc-shaped groove C2

[0147] Third arc-shaped groove C3

[0148] First slot C4

[0149] C5

[0150] Spacing C6

[0151] First arc-shaped groove C21

[0152] Second arc-shaped groove C22

[0153] Inner groove surface P11

[0154] outer groove surface P12

[0155] Bottom groove surface P13

[0156] Top groove surface P14

[0157] First side view, P21

[0158] Second side view P22

[0159] First top surface P31

[0160] Second top surface P32

[0161] Side groove surface P51

[0162] P52, bottom of the trough

[0163] Mounting hole K1

[0164] Width direction X

[0165] Length direction Y

[0166] Z-direction of thickness

[0167] Axial Y1

[0168] Figures 33-34 Explanation of the main component symbols in the code:

[0169] Shaft assembly 500

[0170] Main swing arm 510

[0171] 520 auxiliary swing arm

[0172] Sliding mating plate 521

[0173] Zhongliang 530

[0174] Connector block 540

[0175] Sliding groove 541 Detailed Implementation

[0176] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0177] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. When a component is said to be "set on" another component, it can be directly set on the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0178] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0179] Some embodiments of this application are described in detail. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0180] Example

[0181] This application provides a foldable device, which includes, but is not limited to, foldable electronic products such as mobile phones, tablet personal computers, laptop computers, laptops, personal digital assistants (PDAs), personal computers, multimedia players, smart screens, e-book readers, in-vehicle devices, or wearable devices. Wearable devices include, but are not limited to, smart bracelets, smartwatches, smart head-mounted displays, and smart glasses.

[0182] Figure 1 A schematic diagram of the structure of the foldable device 100 provided in the embodiment of this application when it is in the unfolded state; Figure 2 for Figure 1 The diagram shows the structure of the foldable device 100 in the folded state. Figure 2 In this context, the folding state of the foldable device 100 is specifically an inward folding state. Inward folding means that in this folding state, the foldable screen 2 of the foldable device 100 is folded inwards. (See reference...) Figure 1 and Figure 2 This embodiment uses a foldable mobile phone as an example to illustrate the foldable device 100.

[0183] For the foldable device 100, it can have different usage states in different usage scenarios. Figure 1 The foldable device 100 is shown in its unfolded state, at which time the foldable device 100 can realize a large screen display; Figure 2 The foldable device 100 is shown in a folded state. At this time, the area occupied by the foldable device 100 (referring to the area perpendicular to the thickness direction of the foldable device 100) is small, making it easy to carry, and the folding screen 2 is located on the inside and is well protected.

[0184] in addition, Figure 1 and Figure 2 The foldable device 100 shown is an electronic device capable of folding once. The electronic device includes two parts that can rotate relative to each other. When the two parts rotate to be coplanar, the foldable device 100 is in an unfolded state (e.g., Figure 1 As shown), when the two parts are rotated to overlap each other, the foldable device 100 is in a folded state (as shown). Figure 2 (As shown). In other embodiments, the foldable device 100 may also be an electronic device capable of folding more times (three or more times). In this case, the foldable device 100 may include a plurality of parts that are rotatably connected in sequence. Two adjacent parts may be relatively far apart to be unfolded into an unfolded state, and two adjacent parts may also be relatively close to be folded into a folded state.

[0185] Figure 3 for Figure 1 Exploded view of the foldable device 100. (Refer to...) Figure 3 As shown, the foldable device 100 includes a housing assembly 1 and a foldable screen 2. The foldable screen 2 is supported and connected to one side surface of the housing assembly 1. The side surface of the foldable screen 2 opposite to the housing assembly 1 is used to display information and / or provide an interactive interface for the user.

[0186] In this embodiment, the foldable screen 2 may be, but is not limited to, an organic light-emitting diode (OLED) display, an active-matrix organic light-emitting diode (AMOLED) display, a mini organic light-emitting diode (MLED) display, a micro organic light-emitting diode (MOLED) display, a micro organic light-emitting diode (MLED) display, or a quantum dot light-emitting diode (QLED) display, etc.

[0187] The foldable screen 2 may include a first part 2a, a second part 2b, and a foldable part 2c, with the foldable part 2c connected between the first part 2a and the second part 2b. During use, the first part 2a and the second part 2b can remain stacked on the housing assembly 1, while the foldable part 2c can be bent and deformed to change the angle between the first part 2a and the second part 2b, so that the foldable screen 2 folds or unfolds with the movement of the housing assembly 1, thereby enabling the foldable device 100 to switch between a folded state and an unfolded state.

[0188] For example, in the foldable screen 2, at least the foldable portion 2c is made of a flexible material so that the foldable portion 2c can be bent. The first portion 2a and the second portion 2b can be made of flexible materials, or they can be made of rigid materials, or they can be made of a combination of rigid and flexible materials. This embodiment does not impose any limitations on this. In some embodiments, the foldable screen 2 is a single component made of the same material, and the first portion 2a, the foldable portion 2c, and the second portion 2b are components of this single component.

[0189] Driven by the housing component 1, the foldable screen 2 can switch between an unfolded state and a folded state. Combined with... Figure 1 and Figure 3 As shown, when the foldable screen 2 is in the unfolded state, the first part 2a and the second part 2b are unfolded in a relatively far apart manner, while the foldable part 2c is unfolded without being bent. The first part 2a, the second part 2b, and the foldable part 2c all face the same direction and are coplanar. At this time, the angle between the first part 2a and the second part 2b of the foldable screen 2 is 180°. The foldable screen 2 can achieve a large-screen display, providing users with richer information and a better user experience.

[0190] It should be noted that the angles illustrated in this embodiment are allowed to have slight deviations. For example, Figure 1 The included angle shown is 180°, which can be 180° or approximately 180°, such as 170°, 175°, 185°, or 190°. The angles illustrated in the following text can be understood in the same way.

[0191] See also Figure 2 and Figure 3 When the foldable screen 2 is in the inward folding state, the first part 2a and the second part 2b are stacked relative to each other and sandwiched inside by the housing assembly 1, while the foldable part 2c is in another bending state (such as a teardrop-shaped bend, a U-shaped bend, etc.). At this time, the included angle between the first part 2a and the second part 2b of the foldable screen 2 is 0°, the foldable device 100 occupies a small area, making it easy to carry and store, and the foldable screen 2 is protected by the housing assembly 1 and is not easily damaged.

[0192] In some embodiments, the foldable device 100 can hover at an angle between the unfolded state and the folded state. For example, the hovering angle of the foldable device 100 can be 90°, 120°, 135°, 150°, 210°, 225°, 240°, 270°, 300°, 315°, 330°, etc. The housing assembly 1 can be suspended in an intermediate state between the folded and unfolded states by the damping force provided by the housing assembly 1, and the foldable screen 2 remains in this state along with the housing assembly 1. At this time, the foldable portion 2c of the foldable screen 2 is also in a bent state, and the degree of bending of the foldable portion 2c is less than the degree of bending when it is in the folded state.

[0193] The housing assembly 1 supports and mounts the foldable screen 2, and drives the foldable screen 2 to switch between a folded state and an unfolded state. (See reference...) Figure 3 As shown, the housing assembly 1 includes a first housing 1a, a second housing 1b, and a rotating shaft assembly 1c. The rotating shaft assembly 1c is connected between the first housing 1a and the second housing 1b. The first housing 1a and the second housing 1b are rotatably connected through the rotating shaft assembly 1c, thereby realizing relative rotation between the first housing 1a and the second housing 1b.

[0194] The first housing 1a supports and connects to the first part 2a of the foldable screen 2, the second housing 1b supports and connects to the second part 2b of the foldable screen 2, and the pivot assembly 1c corresponds to the foldable part 2c of the foldable screen 2. When the first housing 1a and the second housing 1b rotate relative to each other via the pivot assembly 1c, the first part 2a and the second part 2b of the foldable screen 2 change their orientation accordingly, and the foldable part 2c of the foldable screen 2 bends or flattens as the orientation of the first part 2a and the second part 2b changes.

[0195] For example, the first housing 1a may have a support surface facing the first portion 2a of the folding screen 2, the first portion 2a of the folding screen 2 being attached (e.g., bonded) to the support surface of the first housing 1a. Similarly, the second housing 1b may have a support surface facing the second portion 2b of the folding screen 2, the second portion 2b of the folding screen 2 being attached (e.g., bonded) to the support surface of the second housing 1b.

[0196] In addition, both the first housing 1a and the second housing 1b can have a receiving space for installing some functional components (not shown in the figure) of the foldable device 100, such as circuit boards, batteries, camera modules, microphones, speakers, etc. For example, circuit boards can be provided in both the first housing 1a and the second housing 1b, and electrical connections between the functional components in the two housings can be realized through the circuit boards in the two housings; the battery for powering the functional components can be provided only in the first housing 1a or the second housing 1b, or the battery can be provided in both the first housing 1a and the second housing 1b; other components such as camera modules, microphones, speakers, etc. can be centrally located in the first housing 1a or the second housing 1b, or some can be located in the first housing 1a and others in the second housing 1b.

[0197] Both the first housing 1a and the second housing 1b may include a middle frame (not shown in the figure) and a back cover (not shown in the figure). The middle frame is connected between the folding screen 2 and the back cover. The side surface of the middle frame facing the folding screen 2 forms the aforementioned support surface. The folding screen 2 can be attached to this side surface of the middle frame. The back cover is connected to the side of the middle frame away from the folding screen 2. The middle frame and the back cover together enclose a receiving space for installing functional devices.

[0198] In some embodiments of this example, the housing assembly 1 of the foldable device 100 can be folded or unfolded synchronously on both sides. That is, when the first housing 1a rotates relative to the pivot assembly 1c under force, this rotation can be transmitted to the second housing 1b, causing the second housing 1b to also rotate relative to the pivot assembly 1c. This synchronization can be complete synchronization, meaning the rotation of the first housing 1a relative to the pivot assembly 1c can be instantaneously transmitted to the second housing 1b, making the movement of the second housing 1b completely synchronized with the first housing 1a. Alternatively, this synchronization can be a synchronization with a certain error, meaning the movement of the second housing 1b can be slightly slower than that of the first housing 1a (e.g., lags by 5-10°). Similarly, the rotation of the second housing 1b can also be transmitted to the first housing 1a, thereby causing the first housing 1a to rotate synchronously.

[0199] It should be noted that, Figures 1-3 The foldable device shown is a schematic diagram with simplified structural and / or appearance details, and does not represent the actual appearance or structure.

[0200] See Figure 33 and Figure 34 The hinge assembly 500 of the foldable electronic device in the related technology mainly includes a central beam 530, a secondary swing arm 520, a main swing arm 510, and a connecting block 540. The connecting block 540 is used to connect the housing of the foldable electronic device. One end of the main swing arm 510 is rotatably connected to the central beam 530, and the other end is rotatably connected to it. One end of the secondary swing arm 520 is rotatably connected to the central beam 530, and the other end is slidably connected to the connecting block 540. For example, the secondary swing arm 520 is slidably engaged in a sliding engagement groove 541 opened on the connecting block 540 through its sliding engagement plate portion 521.

[0201] Since the auxiliary swing arm 520 and the connecting block 540 are in a sliding fit, the following is adopted: Figure 33 and Figure 34 The foldable electronic device of the pivot assembly 500 shown is accidentally dropped during use, or during drop tests (such as corner drop, side drop, boss drop, etc.), after the drop impact force F1 or F2 is transmitted to the auxiliary swing arm 520, the force will follow... Figure 33 or Figure 34 If the direction of the dotted arrow is removed, the secondary swing arm 520 cannot provide reliable support for the connecting block 540, and the connecting block 540 will slide relative to the secondary swing arm 520. This has an adverse effect on the overall impact resistance of the pivot assembly 500.

[0202] In particular, inward-folding phones, as a crucial component of foldable phones, are increasingly widely used in current smartphones, with the main development trend being towards thinner and lighter designs. The thinner hinge assembly 500 contains components (such as the connecting block 540) with relatively thin dimensions, which exacerbates the potential for drop damage to the hinge assembly 500.

[0203] In view of this, this embodiment provides a pivot assembly, wherein the second swing arm (corresponding to) Figure 33 and Figure 34 The secondary swing arm shown in the related technology can reliably support the connecting block and / or via the first swing arm (corresponding to) Figure 33 and Figure 34 The main swing arm (supporting connecting block) in the related technology shown here enables the pivot assembly to have better mechanical properties or impact resistance, which will be described exemplarily below with reference to the accompanying drawings.

[0204] Figure 4 A rotating shaft assembly 1c according to an embodiment of this application is shown. Figure 4 In the case of the hinge assembly 1c being in the unfolded state, the hinge assembly 1c is able to support the foldable device 100 in the unfolded state.

[0205] See Figure 4 The pivot assembly 1c includes a central beam 30 and multiple support mechanisms 110, which are distributed on both sides of the central beam 30. For example... Figure 4 As shown in the diagram, there are four support mechanisms 110. Two of the support mechanisms 110 are respectively located on both sides of one end of the middle beam 30 along the length direction Y, and the other two support mechanisms 110 are distributed on both sides of the other end of the middle beam 30 along the length direction Y. The length direction Y of the middle beam 30 is parallel to the axial direction Y1 of the rotating shaft assembly 1c.

[0206] Figure 5 for Figure 4 Enlarged view of point A of the rotating shaft assembly 1c; Figure 6 for Figure 5 A perspective view of the rotating shaft assembly 1c.

[0207] See Figure 5 and Figure 6 Each support mechanism 110 includes a connecting block 40 and one or more swing arm assemblies 120, for example, two swing arm assemblies 120 are shown in the figure. Each swing arm assembly 120 is connected between the center beam 30 and the connecting block 40 to drive the connecting block 40 to rotate relative to the center beam 30.

[0208] See Figure 5 and Figure 6 In this embodiment, the support mechanism 110 also includes a door panel 50, which is connected to the connecting block 40 to support the folding screen 2.

[0209] Figure 7 for Figure 5 A plan view of the pivot assembly 1c in the folded state; Figure 8 for Figure 7 A 3D view. In the folded state, the support mechanisms 110 on both sides of the hinge assembly 1c come together to bend and support the foldable screen 2.

[0210] In this embodiment, the door panel 50 is rotatably connected to the connecting block 40, so that while the door panel 50 moves with the connecting block 40, it can also deflect relative to the connecting block 40. This allows for convenient design and adjustment of the support angle of the door panel 50 on the folding screen 2.

[0211] like Figure 9 As shown, when the hinge assembly 1c switches between the unfolded state, the intermediate state, and the folded state, the door panel 50 rotates relative to the connecting block 40 by a certain angle. Figure 9 As shown, during the process of switching the pivot assembly 1c from the unfolded state to the folded state, the connecting block 40 rotates 90° under the drive of the swing arm assembly 120. While the door panel 50 rotates 90° with the swing arm assembly 120 along with the connecting block 40, it also rotates a certain angle (about 30°) relative to the door panel 50. In this way, a cone-shaped space is defined between the two door panels 50, which is beneficial for the folding screen 2 to be supported in a teardrop shape in the folded state.

[0212] In other embodiments, the door panel 50 may also be fixedly connected to the connecting block 40, so that the movement trajectory of the door panel 50 is consistent with that of the connecting block 40.

[0213] In some other embodiments, the door panel 50 may be omitted, allowing the connecting block 40 to directly support the folding screen 2.

[0214] See Figure 10 and Figure 11 The swing arm assembly 120 includes a first swing arm 10 and a second swing arm 20.

[0215] The first swing arm 10 is rotatably connected at one end to the middle beam 30 and at the other end to the connecting block 40.

[0216] The second swing arm 20 is rotatably connected to the middle beam 30 at one end near the middle beam 30, and the second swing arm 20 is connected to the connecting block 40 at one end near the connecting block 40. When the rotating shaft assembly 1c is in a folded state and / or an unfolded state, the second swing arm 20 can abut against the connecting block 40 and / or the first swing arm 10 in a direction away from the middle beam 30.

[0217] The direction away from the center beam 30 refers to the direction from the center beam 30 towards the connecting block 40. The second swing arm 20 abuts against the connecting block 40 in this direction away from the center beam 30, so that in the folded and / or unfolded state, the second swing arm 20 can support between the center beam 30 and the connecting block 40 to transmit impact force. The supporting capacity of the second swing arm 20 on the connecting block 40 can reduce the possibility of excessive relative displacement between the connecting block 40 and the center beam 30 at the connection point of the second swing arm 20 when the rotating shaft assembly 1c is impacted, due to a lack of reliable mutual support.

[0218] The second swing arm 20 can abut against the connecting block 40 and / or the first swing arm 10. This means that, in the folded state and / or unfolded state, the second swing arm 20 can directly abut against and support the connecting block 40 and / or the first swing arm 10. Alternatively, there can be only a gap less than an allowable distance between the second swing arm 20 and the first swing arm 10, and / or only a gap less than an allowable distance between the second swing arm 20 and the connecting block 40. The allowable distance is, for example, 0.5 mm, and can be set as needed. This ensures that when the rotating shaft assembly 1c is subjected to external forces such as a drop impact, the relative displacement between the second swing arm 20 and the first swing arm 10 / connecting block 40 can only be less than the allowable distance. After this relative displacement equals the allowable distance, the gap disappears, allowing the second swing arm 20 and the first swing arm 10 / connecting block 40 to directly abut against each other and transmit the impact force.

[0219] In this embodiment, the second swing arm 20 of the hinge assembly 1c can abut against the connecting block 40 to provide support for the connecting block 40, or the second swing arm 20 can abut against the first swing arm 10 to support the connecting block 40. This improves the structural rigidity of the hinge assembly 1c and its overall impact resistance, enabling foldable electronic devices using this hinge assembly 1c to successfully withstand various drop tests and accidental drops during use.

[0220] In comparison, Figure 33 and Figure 34 The pivot assembly 500 shown in the related technology has a sliding fit between its secondary swing arm 520 (corresponding to the second swing arm 20 in this embodiment) and the connecting block 540, which cannot provide reliable support for the connecting block 540, resulting in relatively poor impact resistance of the pivot assembly 500.

[0221] See you again Figure 11 In this embodiment, the first swing arm 10 is rotatably connected to the connecting block 40 via a first shaft 71. For example, the first swing arm 10 includes a first swing plate 12, and a first sleeve 13 is connected to one end of the first swing plate 12 near the connecting block 40. The connecting block 40 is provided with a third sleeve 41. Both the first sleeve 13 and the third sleeve 41 are sleeved outside the first shaft 71, and the first sleeve 13 and the first shaft 71 are in a rotatable fit, and / or the third sleeve 41 and the first shaft 71 are in a rotatable fit. In this way, a rotatable connection between the first swing arm 10 and the connecting block 40 can be achieved (also seen in...). Figure 29 ).

[0222] In this embodiment, the connecting block 40 is provided with a mounting hole K1 that passes through its axial Y1 end face. During assembly, the first shaft 71 can be inserted into the mounting hole K1 along the axial Y1, so that the first shaft 71 passes through the holes of the first sleeve 13 and the third sleeve 41 in sequence, so as to realize the rotational connection between the first sleeve 13 and the third sleeve 41.

[0223] Optionally, the first sleeve 13 is broken at the middle position to accommodate the third sleeve 41, so that the first sleeve 13 and the third sleeve 41 are coaxially arranged and can simultaneously cooperate with the first shaft 71.

[0224] In other embodiments, the rotational engagement between the first swing arm 10 and the connecting block 40 may also take other forms, which are not limited here.

[0225] The following will exemplarily describe the mutual support structure between the second swing arm 20 and the connecting block 40 or the first swing arm 10 in this embodiment, as well as the impact force transmission form of the rotating shaft assembly 1c during a fall.

[0226] See Figure 12 and Figure 13In this embodiment, the connecting block 40 is provided with a second arcuate groove 42, and the second arcuate groove 42 has a second arcuate groove C2. The second swing arm 20 is provided with a second swing plate 22 and a second pin 24, and the second pin 24 is connected to the second swing plate 22. The second pin 24 and the second arcuate groove C2 form a sliding and rotatable high-pair fit, that is, the second pin 24 can slide along the second arcuate groove C2, and can also rotate relative to the second arcuate groove 42 in the second arcuate groove C2. That is, the fit between the second pin 24 and the second arcuate groove C2 has two degrees of freedom, including one sliding degree of freedom and one rotational degree of freedom.

[0227] In this embodiment, the second arcuate groove 42 is circumferentially closed, making the second arcuate groove C2 a closed groove. The second pin 24 extends into the second arcuate groove C2 along the axial direction Y1 of the rotating shaft assembly 1c and is confined between the two ends of the second arcuate groove C2 in its extending direction. Thus, the second swing arm 20 can abut against the second arcuate groove 42 at both ends in its extending direction to achieve force transmission between the second swing arm 20 and the connecting block 40.

[0228] Figure 14 for Figure 5 Sectional view along BB line and Figure 7 The combined schematic diagram of the cross-sectional view along line CC mainly shows the support of the second swing arm 20 on the connecting block 40 of the pivot assembly 1c in the folded and unfolded states.

[0229] See Figure 14 The second arc-shaped groove C2 is a strip-shaped groove extending along an arc. The second arc-shaped groove C2 includes an inner groove surface P11, an outer groove surface P12, a top groove surface P13, and a bottom groove surface P14. The bottom groove surface P14 is located at the end of the second arc-shaped groove C2 extending towards the center beam 30, and the top groove surface P13 is located at the end of the second arc-shaped groove C2 extending away from the center beam 30. The inner groove surface P11 and the outer groove surface P12 are spaced apart from each other and connected between the top groove surface P13 and the bottom groove surface P14, respectively. When the pivot assembly 1c is in the folded state, the inner groove surface P11 is located on the inner side, and the outer groove surface P12 is located on the outer side. That is, the inner groove surface P11 is located on the side of the outer groove surface P12 near the surface of the pivot assembly 1c used to support the folding screen 2.

[0230] Optionally, the second pin 24 is cylindrical, and the width of the second arcuate groove C2 (i.e., the distance between the inner groove surface P11 and the outer groove surface P12) is equal to or slightly larger than the diameter of the second pin 24. The bottom groove surface P14 and the top groove surface P13 are semicircles with diameters equal to or slightly larger than the second pin 24. The inner groove surface P11 extends laterally in a section near the bottom groove surface P14, so that in the thickness direction Z along the middle beam 30, the inner groove surface P11 partially corresponds to the second pin 24, so that when a force in the thickness direction Z along the middle beam 30 is applied to the second swing arm 20, it can be transmitted to the second arcuate groove body 42.

[0231] See Figure 14 The solid line portion of the pivot assembly 1c, when the pivot assembly 1c is in the folded state, has the second pin 24 located at one end of the second arc-shaped groove C2 near the bottom groove surface P14, and abutting against the inner groove surface P11 in a direction away from the middle beam 30. Optionally, in this folded state, the direction of the supporting force FN1 of the second pin 24 on the inner groove surface P11 of the second arc-shaped groove C2 is inclined to intersect the thickness direction Z of the middle beam 30. Thus, when the pivot assembly 1c is in the folded state... Figure 14 When the solid-lined portion of the pivot assembly 1c falls downwards, the impact force F1 along the thickness direction Z of the central beam 30 is transmitted through the central beam 30 to the second swing arm 20, and then further transmitted through the second pin 24 of the second swing arm 20 to the second arc groove 42 of the connecting block 40. That is, during the fall, the second swing arm 20 can support the connecting block 40, preventing the connecting block 40 from undergoing excessive displacement relative to the second swing arm 20 and excessive deformation, which could lead to mechanical damage by squeezing surrounding structures (such as the door panel 50, folding screen 2, etc.).

[0232] See Figure 14 The dotted line portion of the pivot assembly 1c indicates that when the pivot assembly 1c is in the unfolded state, the second pin 24 is located at one end of the second arc-shaped groove C2 near the top groove surface P13, and abuts against the top groove surface P13 in a direction away from the central beam 30. At this time, when the pivot assembly 1c falls, under the impact force F2 along the width direction X of the central beam 30, the second pin 24 of the second swing arm 20 can provide a supporting force FN2 to the connecting block 40 through the top groove surface P13, preventing the connecting block 40 from undergoing excessive displacement relative to the second swing arm 20 and excessive deformation, which could lead to mechanical damage by squeezing surrounding structures (such as the door panel 50, folding screen 2, etc.). It should be noted that when the pivot assembly 1c undergoes drop tests such as corner drops, its drop state is... Figure 14 The state of the dotted part of the rotating shaft assembly 1c after rotating 90°, that is, the impact force F2 along the direction of gravity.

[0233] Therefore, in this embodiment, the pivot assembly 1c and the second swing arm 20 can provide support for the connecting block 40 in the folded or unfolded state, thereby improving the impact resistance of the pivot assembly 1c.

[0234] See you again Figure 12 and Figure 13 In this embodiment, the connecting block 40 is provided with a first groove C4, which is recessed from one side of the connecting block 40 near the middle beam 30. The first groove C4 has a bottom surface P52 and two side groove surfaces P51, which are opposite each other along the axial direction Y1 of the rotating shaft assembly 1c.

[0235] The second arc groove 42 protrudes from one side groove surface P51 of the first cut groove C4. Optionally, a reinforcing plate portion 43 is provided inside the first cut groove C4, and one end of the second arc groove 42 away from the central beam 30 is connected to the bottom surface P52 of the first cut groove C4, while one side of the second arc groove 42 along the thickness direction Z is connected to the reinforcing plate portion 43. Thus, the second arc groove 42 has high structural strength. In this embodiment, the connecting block 40 can be a one-piece molded part.

[0236] In this embodiment, the connecting block 40 has two first grooves C4, which are spaced apart along the axial direction Y1 of the rotating shaft assembly 1c. The two first grooves C4 have adjacent side groove surfaces P51 respectively provided with the aforementioned second arcuate grooves 42, which respectively engage with the second pins 24 of the second swing arms 20 of the two swing arm assemblies 120. The two second swing arms 20 and the two second arcuate grooves 42 can be arranged symmetrically, which helps to provide a more balanced support force to the connecting block 40 from the second swing arms 20.

[0237] In other embodiments, the two side groove surfaces P51 of the same first groove C4 can be arranged with second arc grooves 42, and correspondingly, the second swing arm 20 can be provided with two second pins 24 that respectively cooperate with the two second arc grooves 42.

[0238] The following is an example of the cooperation structure between the second swing arm 20 and the first swing arm 10.

[0239] Figure 15 This is an exploded view of the swing arm assembly 120 in this embodiment. Figure 16 This is a perspective view of the swing arm assembly 120 when the pivot assembly 1c is in the unfolded state.

[0240] See Figures 15-16 In this embodiment, the first swing arm 10 is provided with a first arcuate groove 14, and the first arcuate groove 14 has a first arcuate groove C1. The second swing arm 20 is also provided with a first pin 23, and the first pin 23 and the first arcuate groove C1 form a sliding and rotatable high-pair fit. The first arcuate groove 14 can be disposed on one side of the first swing plate 12, and the first pin 23 can protrude from one side of the second swing plate 22, for example, protruding from the side opposite to the second pin 24.

[0241] The first arc-shaped groove C1 extends along an arc and may not be circular, while the first pin 23 is cylindrical. Thus, the first pin 23 can slide along the extension direction of the first arc-shaped groove C1, and can also rotate relative to the first arc-shaped groove body 14 within the first arc-shaped groove C1. That is, the mating pair between the first pin 23 and the first arc-shaped groove C1 is a higher pair with two degrees of freedom, including one sliding degree of freedom and one rotational degree of freedom.

[0242] The first arcuate groove 14 is circumferentially closed, making the first arcuate groove C1 a closed groove. The first pin 23 extends into the first arcuate groove C1 along the axial direction Y1 of the rotating shaft assembly 1c and is confined between the two ends of the first arcuate groove C1 in its extending direction. In this way, the first swing arm 10 can abut against the first arcuate groove 14 at both ends in its extending direction to realize the transmission of force between the second swing arm 20 and the first swing arm 10.

[0243] Figure 17 This is a perspective view of the swing arm assembly 120 when the pivot assembly 1c is in the unfolded state. Figure 18 This is a perspective view of the swing arm assembly 120 when the pivot assembly 1c is in a folded state. Figure 19 for Figure 5 Sectional view along DD line and Figure 7 The combined schematic diagram of the cross-sectional view along line EE mainly shows the support of the second swing arm 20 on the first swing arm 10 in the folded and unfolded states of the pivot assembly 1c.

[0244] See also Figures 17-19 In this embodiment, the first arc-shaped groove C1 is a strip-shaped groove extending along an arc. The first arc-shaped groove C1 includes an inner groove surface P41, an outer groove surface P42, a top groove surface P43, and a bottom groove surface P44. The bottom groove surface P44 is located at one end of the first arc-shaped groove C1 near the middle beam 30 in the extension direction, and the top groove surface P43 is located at one end of the first arc-shaped groove C1 away from the middle beam 30 in the extension direction. The inner groove surface P41 and the outer groove surface P42 are spaced apart from each other and are respectively connected between the top groove surface P43 and the bottom groove surface P44. When the pivot assembly 1c is in a folded state, the inner groove surface P41 is located on the side of the outer groove surface P42 near the surface of the pivot assembly 1c used to support the foldable screen 2.

[0245] Optionally, the first pin 23 is cylindrical, and the width of the first arcuate groove C1 (i.e., the distance between the inner groove surface P41 and the outer groove surface P42) is equal to or slightly larger than the diameter of the first pin 23. The bottom groove surface P44 and the top groove surface P43 are semicircles with diameters equal to or slightly larger than the first pin 23. The inner groove surface P41 extends laterally in a section near the bottom groove surface P44, so that in the thickness direction Z along the middle beam 30, the inner groove surface P41 partially corresponds to the first pin 23, so that after the force in the thickness direction Z along the middle beam 30 is applied to the second swing arm 20, it can be transmitted to the first arcuate groove body 14.

[0246] See Figure 19The solid line portion of the pivot assembly 1c, when the pivot assembly 1c is in the folded state, has the first pin 23 located at one end of the first arc-shaped groove C1 near the bottom groove surface P44, and abutting against the inner groove surface P41 of the first arc-shaped groove C1 in a direction away from the middle beam 30. Optionally, in this folded state, the direction of the supporting force FN3 of the first pin 23 on the inner groove surface P41 of the first arc-shaped groove C1 is inclined to intersect with the thickness direction Z of the middle beam 30. Thus, when the pivot assembly 1c is in the folded state... Figure 19 When the solid-lined portion of the pivot assembly 1c falls downwards, the impact force F1 along the thickness direction Z of the central beam 30 is transmitted through the central beam 30 to the second swing arm 20, and then further transmitted through the first pin 23 of the second swing arm 20 to the first arc groove 14 of the first swing arm 10. That is, during the fall, the second swing arm 20 can support the first swing arm 10, and in turn, the first swing arm 10 supports the connecting block 40, preventing the connecting block 40 from undergoing excessive displacement and deformation relative to the second swing arm 20, which could lead to mechanical damage caused by squeezing surrounding structures (such as the door panel 50, folding screen 2, etc.).

[0247] See Figure 19 The dotted line portion of the pivot assembly 1c indicates that when the pivot assembly 1c is in the unfolded state, the first pin 23 is located at one end of the first arc-shaped groove C1 near the top groove surface P13, and abuts against the top groove surface P13 in a direction away from the central beam 30. At this time, when the pivot assembly 1c falls, under the impact force F2 along the width direction X of the central beam 30, the first pin 23 of the second swing arm 20 can provide a supporting force FN4 to the first swing arm 10 through the top groove surface P13. This, in turn, supports the connecting block 40 through the first swing arm 10, preventing the connecting block 40 from undergoing excessive displacement relative to the second swing arm 20 and excessive deformation, which could lead to mechanical damage by squeezing surrounding structures (such as the door panel 50, folding screen 2, etc.). It should be noted that when the pivot assembly 1c undergoes drop tests such as corner drops, its drop state is... Figure 19 The state of the dotted part of the rotating shaft assembly 1c after rotating 90°, that is, the impact force F2 along the direction of gravity.

[0248] Therefore, in this embodiment, the second swing arm 20 of the pivot assembly 1c can provide support for the first swing arm 10 through the first pin 23 in the folded state or the unfolded state, and then support the connecting block 40 through the first swing arm 10, thereby improving the impact resistance of the pivot assembly 1c.

[0249] See also Figures 17-19 In this embodiment, the second swing arm 20 is further provided with a top abutment 25. The first swing arm 10 has a first abutment surface P31 and a second abutment surface P32, which are respectively facing the side of the middle beam 30. The first abutment surface P31 is located on the side of the second abutment surface P32 closer to the middle beam 30. In this way, the second swing arm 20 can abut against and support the first swing arm 10 in a direction away from the middle beam 30.

[0250] In this embodiment, as Figure 17 When the rotating shaft assembly 1c is in the unfolded state, the top abutment 25 abuts against the second abutment surface P32; as Figure 18 When the pivot assembly 1c is in a folded state, the top abutment 25 abuts against the first abutment surface P31.

[0251] Exemplarily, the first swing arm 10 has a first side surface P21 near the second swing arm 20 along the axial direction Y1 of the rotating shaft assembly 1c, and the second swing arm 20 has a second side surface P22 near the first swing arm 10 along the axial direction Y1 of the rotating shaft assembly 1c. Optionally, the first pin portion 23 of the second swing arm 20 protrudes from its second side surface P22 and extends laterally into the first arc-shaped groove C1. A section of the first side surface P21 near the center beam 30 is recessed to form a relief groove C5, and the groove side of the relief groove C5 facing the center beam 30 is a first abutment surface P31. The second side surface P22 can be one side surface of the second swing plate 22 of the second swing arm 20. The second side surface P22 protrudes towards the first swing arm 10 to form the aforementioned abutment top 25. The first swing arm 10 is also provided with a mating portion 14a, which is located on the side of the abutment top 25 away from the center beam 30 and has a second abutment surface P32 facing the center beam 30. Optionally, the aforementioned first arc groove 14 of the first swing arm 10 serves as the mating part 14a, and the second abutting surface P32 is located at the portion of the first arc groove 14 that protrudes from the first swing plate 12 along the thickness direction Z.

[0252] See Figure 18 and Figure 19 The solid-lined portion of the pivot assembly 1c, when the pivot assembly 1c is in the folded state, has its top 25 engaging with the clearance groove C5, and the top 25 abutting against the first abutting surface P31. Thus, in the pivot assembly 1c... Figure 19 When the solid-lined portion of the pivot assembly 1c falls downwards, the impact force F1 along the thickness direction Z of the central beam 30 is transmitted through the central beam 30 to the second swing arm 20, and can further be transmitted through the top 25 of the second swing arm 20 to the first abutment surface P31 of the first swing arm 10. That is, during the fall, the top 25 of the second swing arm 20 can provide a supporting force FN5 to the first swing arm 10, thereby supporting the connecting block 40 through the first swing arm 10, preventing the connecting block 40 from undergoing excessive displacement and deformation relative to the second swing arm 20, which could lead to mechanical damage caused by squeezing surrounding structures (such as the door panel 50, folding screen 2, etc.).

[0253] See Figure 17 and Figure 19The dotted line portion of the pivot assembly 1c, when the pivot assembly 1c is in the unfolded state, has its top abutment 25 displaced to the side of the thickness direction Z of the first swing arm 10, and abutting against the second abutment surface P32 of the first arc groove 14. At this time, when the pivot assembly 1c falls, under the impact force F2 along the width direction X of the middle beam 30, the top abutment 25 of the second swing arm 20 can provide a supporting force FN6 to the first swing arm 10 through the second abutment surface P32 of the first arc groove 14. This, in turn, supports the connecting block 40 through the first swing arm 10, preventing the connecting block 40 from undergoing excessive displacement relative to the second swing arm 20 and excessive deformation, which could lead to mechanical damage by squeezing surrounding structures (such as the door panel 50, folding screen 2, etc.). It should be noted that when the pivot assembly 1c undergoes drop tests such as corner drops, its drop state is... Figure 19 The state of the dotted part of the rotating shaft assembly 1c after rotating 90°, that is, the impact force F2 along the direction of gravity.

[0254] Therefore, in this embodiment, the second swing arm 20 of the pivot assembly 1c can provide support for the first swing arm 10 by abutting the top 25 in the folded or unfolded state, and then support the connecting block 40 by the first swing arm 10, thereby improving the impact resistance of the pivot assembly 1c.

[0255] In other embodiments, the mating part 14a may also be other parts outside the first arc groove 14, for example, an additional protruding structure is provided on the first swing arm 10 to serve as the mating part 14a.

[0256] In other embodiments, the second swing arm 20 may support the first swing arm 10 only in the folded state of the pivot assembly 1c, while in the unfolded state, the second swing arm 20 may not support the first swing arm 10, or support may be achieved in other ways; conversely, the second swing arm 20 may support the first swing arm 10 only in the unfolded state of the pivot assembly 1c.

[0257] In other embodiments, only the support structure of the second swing arm 20 to the first swing arm 10 (such as the cooperation between the first pin 23 and the first arc groove 14, or the cooperation between the top 25 and the first abutment surface P31 or the second abutment surface P32) can be retained, while the support structure of the second swing arm 20 to the connecting block 40 (such as the cooperation between the second pin 24 and the second arc groove 42) can be omitted.

[0258] In other embodiments, the structure in which the second swing arm 20 directly supports the connecting block 40 may be retained, while the structure in which the second swing arm 20 supports the first swing arm 10 may be omitted.

[0259] That is, as long as the second swing arm 20 can directly support the connecting block 40 or the second swing arm 20 can indirectly support the connecting block 40 through the first swing arm 10, the support capability of the rotating shaft assembly 1c for the connecting block 40 can also be improved.

[0260] In this embodiment, when the pivot assembly 1c is in an unfolded or folded state, the second swing arm 20 abuts against or nearly abuts against the side of the first swing arm 10 near the middle beam 30, so that the force on the second swing arm 20 can be transmitted to the first swing arm 10.

[0261] The phrase "the second swing arm 20 abuts against the side of the first swing arm 10 near the middle beam 30" means that the second swing arm 20 and the first swing arm 10 maintain mutual contact and abutment when the rotating shaft assembly 1c is not subjected to impact force.

[0262] The second swing arm 20 nearly abutting against the first swing arm 10 near the center beam 30 means that there is only a gap between the second swing arm 20 and the first swing arm 10, which is less than the allowable distance. This allows the second swing arm 20 and the first swing arm 10 to undergo relative displacement less than the allowable distance when the rotating shaft assembly 1c is subjected to external forces such as a drop impact. In other words, after the second swing arm 20 and the first swing arm 10 have undergone the allowable relative displacement distance, the gap disappears, allowing the second swing arm 20 and the first swing arm 10 to abut against each other and transmit the impact force. The allowable distance is, for example, 0.5 mm.

[0263] In this embodiment, the second swing arm 20 and the first swing arm 10 overlap at least partially along the thickness direction Z. When the rotating shaft assembly 1c is in a folded state and / or an unfolded state, the overlapping portions of the second swing arm 20 and the first swing arm 10 abut against each other. This overlap along the thickness direction Z can be manifested as the overlap of the first pin portion 23 of the second swing arm 20 and the first arcuate groove 14 of the first swing arm 10 along the thickness direction Z, or as the overlap of the abutting top 25 of the second swing arm 20 and the first swing plate 12 of the first swing arm 10 along the thickness direction Z. In other embodiments, the second swing arm 20 can also achieve overlap and abutment in the thickness direction Z through other means to transmit impact force.

[0264] See Figure 20 In this embodiment, when the rotating shaft assembly 1c is in the deployed state, the second swing arm 20 abuts against the connecting block 40 on one side along the axial direction Y1 of the rotating shaft assembly 1c, away from the central beam 30, and the second swing arm 20 abuts against the first swing arm 10 on the other side along the axial direction Y1 of the rotating shaft assembly 1c, away from the central beam 30. Thus, the forces on both sides of the second swing arm 20 are relatively balanced, and it can directly or indirectly support the connecting block 40.

[0265] Similarly, when the pivot assembly 1c is in the unfolded state, the second swing arm 20 can also support the connecting block 40 and the first swing arm 10 on both sides respectively, and the force balance is good.

[0266] Figure 21 This is a perspective view of the door panel 50 in this embodiment; Figure 22This is a partial exploded view of the rotating shaft assembly 1c in this embodiment.

[0267] See Figure 21 and Figure 22 In this embodiment, the door panel 50 is rotatably connected to the connecting block 40, and the door panel 50 and the first swing arm 10 form a sliding and rotatable high pair fit.

[0268] In each support mechanism 110 of the rotating shaft assembly 1c, there are two swing arm assemblies 120. The two swing arm assemblies 120 are spaced apart along the axial direction Y1 of the rotating shaft assembly 1c, and the two first swing arms 10 of the two swing arm assemblies 120 are located outside the two second swing arms 20. A third pin portion 15 protrudes from the side of the first swing arm 10 away from the second swing arm 20 (also visible in...). Figure 15 For example, the third pin 15 protrudes from one side of the first swing plate 12. The door panel 50 includes a panel body 51, two third arc grooves 53 and two second arc-shaped sliding tongues 52.

[0269] The two second arc-shaped sliding tongues 52 of the door panel 50 are slidably engaged within the two corresponding second arc-shaped sliding grooves C22 on the connecting block 40. The second arc-shaped sliding grooves C22 are annular grooves extending along a circular arc, and the second arc-shaped sliding tongues 52 have an annular structure. The second arc-shaped sliding tongues 52 and the second arc-shaped sliding grooves C22 form a revolute pair with one degree of freedom, allowing the door panel 50 to rotate relative to the connecting block 40.

[0270] The door panel 50 has a third arc-shaped groove 53, and two third arc-shaped grooves 53 are connected to the plate 51 at intervals. The third pins 15 of the two first swing arms 10 form a sliding and rotatable higher pair with the third arc-shaped grooves C3 of the two third arc-shaped grooves 53 respectively. The third arc-shaped groove C3 extends along an arc and may not be circular, while the third pin 15 is cylindrical. Thus, the third pin 15 can slide along the extension direction of the third arc-shaped groove C3 and can also rotate relative to the third arc-shaped groove 53 in the third arc-shaped groove C3. That is, the pair between the third pin 15 and the third arc-shaped groove C3 is a higher pair with two degrees of freedom, including one sliding degree of freedom and one rotational degree of freedom.

[0271] See also Figure 23In this embodiment, the rotating shaft assembly 1c forms a mechanism with an overall degree of freedom of movement of 1, which can ensure a uniquely determined motion. Taking the middle beam 30 as a fixed component as an example, in this rotating shaft assembly 1c, the number of moving components n is 4, namely the first swing arm 10, the second swing arm 20, the connecting block 40, and the door panel 50; the number of lower pair fits PL is 4, namely the rotational joint between the first swing arm 10 and the middle beam 30, the rotational joint between the second swing arm 20 and the middle beam 30, the rotational joint between the first swing arm 10 and the connecting block 40, and the rotational joint between the door panel 50 and the connecting block 40; the number of higher pair fits Ph is 3, namely the slidable and rotatable fit between the second swing arm 20 and the connecting block 40, the slidable and rotatable fit between the second swing arm 20 and the first swing arm 10, and the slidable and rotatable fit between the door panel 50 and the first swing arm 10. According to the formula for calculating the degrees of freedom of a motion mechanism, the degree of freedom of the rotating shaft assembly 1c is F = 3n - (2PL + Ph) = 3 × 4 - 2 × 4 - 3 = 1.

[0272] See Figure 24 and Figure 25 In this embodiment, the pivot assembly 1c may also have a damping component 60 to provide damping for folding or unfolding the pivot assembly 1c, thereby improving the feel and enabling the pivot assembly 1c to hover in an intermediate state. The damping component 60 can achieve damping in various forms, such as damping through relative friction between components, or damping through a spring, and is not limited here. The following describes an example of a damping component 60.

[0273] See Figure 24 and Figure 25 In each support mechanism 110, there are two swing arm assemblies 120. The two swing arm assemblies 120 are spaced apart along the axial direction Y1 of the rotating shaft assembly 1c, and the two first swing arms 10 of the two swing arm assemblies 120 are located outside the two second swing arms 20. The two second swing arms 20 are spaced apart along the axial direction Y1 of the rotating shaft assembly 1c, and a damping assembly 60 is provided between the two second swing arms 20.

[0274] See also Figure 26 and Figure 27 In this embodiment, the second swing arms 20 on both sides of the middle beam 30 are provided with second sleeves 21, and the second sleeves 21 can be connected to the end of the second swing plate 22 near the middle beam 30. The second sleeves 21 have second cam portions 21a.

[0275] The damping assembly 60 includes an elastic element 62 and two sleeve members 61. Each sleeve member 61 has two fourth sleeves 61a, and the end face of each fourth sleeve 61a is provided with a first cam portion 61c. The elastic element 62 is located between the two sleeve members 61 and elastically presses the first cam portions 61c of the two sleeve members 61 against the second cam portions 21a of the two second swing arms 20 along the axial direction Y1 of the rotating shaft assembly 1c, thereby providing damping for the rotation of the second swing arms 20. Specifically, when the rotating shaft assembly 1c is folded or unfolded, the second swing arms 20 will rotate relative to the central beam 30, which further causes the second cam portions 21a on the second swing arms 20 to rotate relative to the first cam portions 61c of the sleeve members 61. Due to the resistance of the elastic element 62, the first cam portion 61c and the second cam portion 21a need to compress or release the elastic element 62 when rotating relative to each other. In this way, the damping assembly 60 can provide damping for the rotation of the second swing arm 20, thereby making the folding or unfolding of the pivot assembly 1c damped, providing a better user experience.

[0276] In this embodiment, the second swing arm 20 is provided with a gear portion 26, which can be connected to one end of the second swing plate 22 near the middle beam 30. The rotating shaft assembly 1c also includes a synchronous gear set 80. The synchronous gear set 80 meshes between the gear portions 26 of the second swing arms 20 of the support mechanisms 110 on both sides of the middle beam 30, so that the second swing arms 20 on both sides rotate synchronously. The synchronous gear set 80 includes two meshing gear components 81, as seen in... Figure 28 The gear components 81 on both sides mesh with the gear parts 26 of the second swing arms 20 on both sides, so that the two second swing arms 20 can rotate synchronously in opposite directions, ensuring that the two sides of the rotating shaft assembly 1c fold or unfold synchronously.

[0277] In other embodiments, the synchronization function of the rotating shaft assembly 1c can also be achieved by the first swing arm 10 or other possible additional swing arms, which is not limited here.

[0278] Of course, in other embodiments, the synchronization function of the shaft assembly 1c can also be achieved by means other than gears, such as linkage mechanism, synchronous spiral groove, etc., which are not limited here.

[0279] See also Figures 25-28 In this embodiment, the rotating shaft assembly 1c is further provided with two second shaft members 72 and two third shaft members 73. The ends of the two second shaft members 72 and the two third shaft members 73 are respectively connected to the middle beam 30, and the two third shaft members 73 are arranged side by side between the two second shaft members 72.

[0280] The second sleeves 21 and gear parts 26 of the second swing arms 20 on both sides of the middle beam 30 are rotatably sleeved on the two second shafts 72 to realize the rotational connection between the second swing arms 20 and the middle beam 30.

[0281] The two gear components 81 of the synchronous gear set 80 are rotatably mounted on the two third shaft components 73, so as to mesh with the two gear parts 26 respectively.

[0282] Two connecting sleeves 61b are also connected between the two fourth sleeves 61a of each sleeve component 61. The two connecting sleeves 61b are sequentially connected between the two fourth sleeves 61a to form an integral sleeve component 61. During assembly, the two fourth sleeves 61a of the sleeve component 61 are respectively fitted onto the two second shaft components 72, and the two connecting sleeves 61b of the sleeve component 61 are respectively fitted onto the two third shaft components 73. In this way, the sleeve component 61 and the center beam 30 are relatively stationary and cannot rotate relative to the center beam 30.

[0283] In this embodiment, optionally, the elastic element 62 is a helical spring, and there are four elastic elements 62 in total. Two elastic elements 62 are respectively sleeved on the two second shaft members 72 to elastically abut against the fourth sleeves 61a at both ends; the other two elastic elements 62 are respectively sleeved on the two third shaft members 73 and elastically abut against the connecting sleeves 61b at both ends. In this way, the four elastic elements 62 can more reliably provide elastic damping for the damping assembly 60.

[0284] In this embodiment, optionally, the gear portion 26 and the second sleeve 21 of each second swing arm 20 are spaced apart along the axial direction Y1 of the rotating shaft assembly 1c and define a spacer groove C6. The rotating shaft assembly 1c also includes a snap-fit ​​plate 63, which respectively passes through two second shaft members 72 and two third shaft members 73. The snap-fit ​​plate 63 snaps into the spacer groove C6 of the second swing arm 20 and abuts against the gear portion 26 and the second sleeve 21 along the axial direction Y1 to ensure that the positions of the second swing arms 20 on both sides are consistent along the axial direction Y1. The snap-fit ​​plate 63 can also limit excessive axial Y1 offset of the two gear members 81 of the synchronous gear set 80.

[0285] In this embodiment, there are two snap-fit ​​plates 63, which are respectively engaged with the second swing arm 20 of the two sets of swing arm assemblies 120.

[0286] See also Figure 29 As described above, in this embodiment, the first swing arm 10 is rotatably connected to the middle beam 30. For example, the middle beam 30 is provided with a first arc-shaped groove C21, and the first swing arm 10 is provided with a first arc-shaped tongue 11 near the middle beam 30. For example, the first arc-shaped tongue 11 is connected to the end of the first swing plate 12 near the middle beam 30.

[0287] The first arc-shaped sliding tongue 11 of the first swing arm 10 is slidably fitted into the first arc-shaped sliding groove C21 on the middle beam 30. The first arc-shaped sliding groove C21 is an arc-shaped groove extending along a circular arc, and the first arc-shaped sliding tongue 11 is an arc-shaped structure. The first arc-shaped sliding tongue 11 and the first arc-shaped sliding groove C21 form a revolute pair with one degree of freedom, so that the first swing arm 10 can rotate relative to the middle beam 30.

[0288] See also Figure 29 and Figure 30 In this embodiment, the middle beam 30 includes a base beam 31, a cap beam 32, and a shaft cap 33. The base beam 31 and the cap beam 32 are stacked and fixedly connected to each other along the thickness direction Z, and the base beam 31 and the cap beam 32 form the aforementioned first arc-shaped sliding groove C21 to cooperate with the first arc-shaped sliding tongue 11 of the first swing arm 10.

[0289] Optionally, the base beam 31 and the cap beam 32 are detachably connected. For example, the cap beam 32 is provided with a first connecting post 32a, and a first screw 38 passes through the base beam 31 and is threaded to the first connecting post 32a to securely connect the cap beam 32 to the base beam 31. The number of the first connecting post 32a and the first screw 38 can be one or more, such as the eight shown in the figure.

[0290] The shaft cover 33 fits onto the side of the base beam 31 opposite to the cover beam 32, serving both protective and decorative purposes. Optionally, the shaft cover 33 is provided with a second connecting post 33a, and a second screw 39 passes through the cover beam 32 and the base beam 31 and is threaded onto the second connecting post 33a, so that the shaft cover 33, the base beam 31, and the cover beam 32 are assembled together.

[0291] In other embodiments, the shaft cover 33 and the base beam 31 may also be integrally formed structures.

[0292] In this embodiment, portions of the first swing arm 10, the second swing arm 20, the damping assembly 60, and the synchronizing gear set 80 are all arranged between the base beam 31 and the cover beam 32. During assembly, the first swing arm 10, the second swing arm 20, the damping assembly 60, and the synchronizing gear set 80 can be arranged on the base beam 31 first, then the cover beam 32 can be attached to the base beam 31 by the first screw 38, and finally the shaft cover 33 can be fixed by the second screw 39.

[0293] Figure 31 Another embodiment of the rotating shaft assembly 1d is shown.

[0294] The pivot assembly 1d is in Figure 4 Based on the pivot assembly 1c shown, a support mechanism 110 can be arranged on both sides of the middle position of the middle beam 30 in the length direction Y (parallel to the axis Y1 of the pivot assembly), thus forming a pivot assembly 1d consisting of the middle beam 30 and six sets of support mechanisms 110, which can provide better support for the folding screen 2.

[0295] Figure 32 Another embodiment of the rotating shaft assembly 1e is shown.

[0296] In the pivot assembly 1e, the central beam 30, the connecting block 40, and the door panel 50 are all continuous structures. That is, the central beam 30, the connecting block 40, and the door panel 50 all extend continuously in the length direction to both ends or near both ends in the height direction of the foldable device 100, so as to provide full-length or near-full-length support for the foldable screen 2, resulting in higher support reliability.

[0297] In this embodiment, the central beam 30, connecting block 40, and door panel 50 of the continuous structure can all be single components formed in one step (such as machining, MIM molding, 3D printing, etc.), or they can be formed into one piece by a secondary molding process (MIM molding, 3D printing, etc.) after being formed in sections (such as machining, MIM molding, 3D printing, etc.), or they can be connected together by screws or other connectors after being formed in sections. The specific molding method is not limited here.

[0298] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the spirit and scope of the technical solutions of this application.

Claims

1. A rotating shaft assembly, characterized in that, include: Central beam; as well as, Multiple support mechanisms are distributed on both sides of the central beam; The supporting mechanism includes: Connector block; and, One or more swing arm assemblies are connected between the center beam and the connecting block; the swing arm assembly includes a first swing arm and a second swing arm, one end of the first swing arm is rotatably connected to the center beam and the other end is rotatably connected to the connecting block; the end of the second swing arm near the center beam is rotatably connected to the center beam. The second swing arm is connected to the connecting block at one end near the connecting block, and when the rotating shaft assembly is in a folded state and / or an unfolded state, the second swing arm can abut against the connecting block and / or the first swing arm in a direction away from the central beam.

2. The rotating shaft assembly according to claim 1, characterized in that: The connecting block is provided with a second arc groove, and the second arc groove has a second arc-shaped groove. The second swing arm is provided with a second pin, which forms a sliding and rotatable high pair with the second arc-shaped groove.

3. The rotating shaft assembly according to claim 2, characterized in that: The second arc groove is closed circumferentially, so that the second arc groove is a closed groove; The second pin extends into the second arcuate groove along the axial direction of the shaft assembly and is confined between the two ends of the second arcuate groove in the extending direction.

4. The rotating shaft assembly according to claim 2, characterized in that: The second arc-shaped groove is a strip-shaped groove extending along an arc; the second arc-shaped groove includes an inner groove surface, an outer groove surface, a top groove surface, and a bottom groove surface; the bottom groove surface is located at one end of the second arc-shaped groove extending towards the center beam, and the top groove surface is located at one end of the second arc-shaped groove extending away from the center beam; the inner groove surface and the outer groove surface are spaced apart from each other and respectively connected between the top groove surface and the bottom groove surface, and when the hinge assembly is in a folded state, the inner groove surface is located on the side of the outer groove surface closer to the surface of the hinge assembly used to support the folding screen; Wherein, when the pivot assembly is in the folded state, the second pin is located at one end of the second arc-shaped groove near the bottom groove surface, and abuts against the inner groove surface in a direction away from the middle beam; and / or When the rotating shaft assembly is in the unfolded state, the second pin is located at one end of the second arc-shaped groove near the top groove surface and abuts against the top groove surface in a direction away from the middle beam.

5. The rotating shaft assembly according to claim 4, characterized in that: When the pivot assembly is in the folded state, the direction of the force between the second pin and the inner groove surface is inclined to intersect the thickness direction of the middle beam.

6. The rotating shaft assembly according to any one of claims 2-5, characterized in that: The connecting block is provided with a first groove, which is formed recessed from one side of the connecting block near the middle beam; The second arc groove protrudes from the side groove surface of the first cutting groove.

7. The rotating shaft assembly according to any one of claims 1-6, characterized in that: When the pivot assembly is in a folded state and / or an unfolded state: The second swing arm abuts against or nearly abuts against the first swing arm on the side near the center beam, so that the force on the second swing arm can be transmitted to the first swing arm.

8. The rotating shaft assembly according to claim 7, characterized in that: The second swing arm and the first swing arm overlap at least partially along the thickness direction; When the pivot assembly is in a folded state and / or an unfolded state, the overlapping portions of the second swing arm and the first swing arm abut against each other.

9. The rotating shaft assembly according to claim 7, characterized in that: The second swing arm has a top abutment on the side of the pivot assembly close to the first swing arm along the axial direction; When the pivot assembly is in a folded and / or unfolded state, the abutment abuts against the side of the first swing arm near the middle beam.

10. The rotating shaft assembly according to claim 7, characterized in that: The first swing arm is provided with a first arc groove, and the first arc groove is provided with a first arc-shaped groove; The second swing arm is provided with a first pin, which forms a sliding and rotatable high pair with the first arc-shaped groove.

11. The rotating shaft assembly according to claim 10, characterized in that: The first arc groove body is closed in the circumferential direction so that the first arc groove is a closed groove; The first pin extends into the first arcuate groove along the axial direction of the shaft assembly and is confined between the two ends of the first arcuate groove in the extending direction.

12. The rotating shaft assembly according to claim 10, characterized in that: The first arc-shaped groove is a strip-shaped groove extending along an arc; the first arc-shaped groove includes an inner groove surface, an outer groove surface, a top groove surface, and a bottom groove surface; the bottom groove surface is located at one end of the first arc-shaped groove extending towards the center beam, and the top groove surface is located at one end of the first arc-shaped groove extending away from the center beam; the inner groove surface and the outer groove surface are spaced apart from each other and respectively connected between the top groove surface and the bottom groove surface, and when the pivot assembly is in a folded state, the inner groove surface is located on the side of the outer groove surface closer to the surface of the pivot assembly used to support the folding screen; Wherein, when the pivot assembly is in a folded state, the first pin is located at one end of the first arc-shaped groove near the bottom groove surface, and abuts against the inner groove surface in a direction away from the middle beam; and / or When the rotating shaft assembly is in the unfolded state, the first pin is located at one end of the first arc-shaped groove near the top groove surface and abuts against the top groove surface in a direction away from the middle beam.

13. The rotating shaft assembly according to claim 7, characterized in that: The second swing arm has a top abutment; The first swing arm has a first abutting surface and a second abutting surface, with the first abutting surface located on the side of the second abutting surface closer to the middle beam; When the pivot assembly is in a folded state, the abutment top abuts against the first abutment surface; When the rotating shaft assembly is in the unfolded state, the abutment top abuts against the second abutment surface.

14. The rotating shaft assembly according to claim 7, characterized in that: The first swing arm has a first side surface that is close to the second swing arm along the axial direction of the pivot assembly, and the second swing arm has a second side surface that is close to the first swing arm along the axial direction of the pivot assembly. The first side has an inwardly recessed section near the middle beam to form a relief groove, and the side of the relief groove facing the middle beam is the first abutment surface; The second side protrudes towards the first swing arm to form a top abutment; the first swing arm is also provided with a mating part, the mating part being located on the side of the top abutment away from the middle beam, and having a second abutment surface facing the middle beam; When the pivot assembly is in a folded state, the abutment head engages with the clearance groove, and the abutment head abuts against the first abutment surface; When the rotating shaft assembly is in the unfolded state, the abutment top is displaced to the side of the thickness direction of the first swing arm and abuts against the second abutment surface.

15. The rotating shaft assembly according to claim 14, characterized in that: The mating part is a first arc groove body, and the first arc groove body has a first arc groove. The second swing arm is provided with a first pin, which protrudes from the second side and extends into the first arc-shaped groove; The first pin and the first arc-shaped groove form a sliding and rotatable high-pair fit.

16. The shaft assembly according to any one of claims 1-15, characterized in that: When the pivot assembly is in a folded state and / or an unfolded state, the second swing arm abuts against the connecting block on one side of the pivot assembly along the axial direction away from the center beam, and the second swing arm abuts against the first swing arm on the other side of the pivot assembly along the axial direction away from the center beam.

17. The shaft assembly according to any one of claims 1-16, characterized in that: The second swing arm and the connecting block form a high-pair fit with 2 degrees of freedom; The second swing arm and the first swing arm form a high pair with 2 degrees of freedom.

18. The rotating shaft assembly according to claim 17, characterized in that: The second swing arm and the connecting block form a sliding and rotatable high-pair fit; The second swing arm and the first swing arm form a sliding and rotatable high pair.

19. The shaft assembly according to any one of claims 1-18, characterized in that: In each of the aforementioned support mechanisms: There are two swing arm assemblies, which are spaced apart along the axial direction of the pivot assembly, and the two first swing arms of the two swing arm assemblies are located outside the two second swing arms; the two second swing arms are spaced apart along the axial direction of the pivot assembly, and a damping assembly is provided between the two second swing arms. The second swing arm is provided with a second sleeve, and the second sleeve has a second cam portion; The damping assembly includes an elastic element and two sleeves, the sleeves being provided with a first cam portion; The elastic element is located between the two sleeves and elastically presses the first cam portion of each of the two sleeves against the second cam portion of each of the two second swing arms along the axial direction of the rotating shaft assembly, thereby providing damping for the rotation of the second swing arms.

20. The shaft assembly according to any one of claims 1-19, characterized in that: The second swing arm is equipped with a gear section; The shaft assembly also includes a synchronous gear set; The synchronous gear set meshes with the gear portion of the second swing arm of the support mechanism on both sides of the middle beam, so that the second swing arms on both sides rotate synchronously.

21. The rotating shaft assembly according to any one of claims 1-20, characterized in that: The support mechanism also includes a door panel for supporting a foldable screen of a foldable electronic device; The door panel is connected to the connecting block.

22. The rotating shaft assembly according to claim 21, characterized in that: The door panel is fixedly connected to the connecting block; or, The door panel is rotatably connected to the connecting block, and the door panel and the first swing arm form a sliding and rotatable high-pair fit.

23. The rotating shaft assembly according to claim 21, characterized in that: In each of the aforementioned support mechanisms: There are two swing arm assemblies, which are spaced apart along the axial direction of the rotating shaft assembly, and the two first swing arms of the two swing arm assemblies are located outside the two second swing arms; a third pin is protruding from the side of the first swing arm opposite to the second swing arm. The door panel includes a panel body and two third arc grooves; each third arc groove has a third arc-shaped groove; the two third arc grooves are connected to the panel body at intervals. The door panel is rotatably connected to the connecting block, and the third pins of the two first swing arms respectively form a sliding and rotatable high pair with the third arc grooves of the two third arc groove bodies.

24. A foldable electronic device, characterized in that, include: The shaft assembly according to any one of claims 1-23; A first housing and a second housing, the first housing and the second housing respectively connected to the connecting blocks of the support mechanism on both sides of the central beam; as well as, A foldable screen, which is stacked on the first housing, the hinge assembly and the second housing.

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