Rotating shaft assembly and foldable equipment

Abstract

The utility model provides a rotating shaft assembly and foldable equipment. The rotating shaft assembly comprises at least one shaft core assembly, at least one clamping shaft sleeve assembly and at least one transmission assembly, and each shaft core assembly comprises at least three shaft cores which are sequentially arranged in the width direction; each group of clamping shaft sleeve assembly comprises a plurality of clamping shaft sleeves, each clamping shaft sleeve surrounds one shaft core in the shaft core group, and a clamping gap with a preset width is formed in the axial direction of each clamping shaft sleeve, so that the clamping shaft sleeves are in interference fit with the shaft cores; the clamping shaft sleeve assembly is further used for being connected to enable the rotating shaft assembly to be folded or unfolded under external force. The transmission assembly comprises a plurality of gear shaft sleeves, each gear shaft sleeve is arranged on the peripheral side of one shaft core in a sleeving mode, the transmission assembly and the clamping shaft sleeve assembly are arranged in the axial direction, the multiple clamping shaft sleeves are matched with the multiple shaft cores to bear the rotating torque of the display screen with a certain weight, and the overall thickness of the display screen when the display screen is opened and closed is reduced through the design of the three shaft cores.

Description

Technical Field

[0001] The present application relates to the technical field of display devices, and in particular to a hinge assembly and a foldable device. Background Art

[0002] The hinge is the main structure for generating and bearing torque in foldable devices. For example, in a multi-screen laptop, multiple display screens need to be opened and closed using a hinge. During the relative rotation of multiple display screens, how to satisfy the requirement of the hinge to withstand the rotation torque of a display screen of a certain weight while reducing the overall thickness of the display screen when it is opened and closed has become a technical problem that needs to be solved. Utility Model Content

[0003] The present application provides a hinge assembly and a foldable device that can withstand the rotational torque of a display screen of a certain weight and reduce the overall thickness of the display screen when it is opened and closed.

[0004] In a first aspect, the present application provides a shaft assembly, comprising:

[0005] At least one set of shaft core components, each set of shaft core components includes at least three shaft cores arranged in sequence along the width direction;

[0006] At least one group of clamping sleeve assemblies, each group of the clamping sleeve assemblies includes a plurality of clamping sleeves, each of the clamping sleeves surrounds a shaft core in the shaft core group, and the clamping sleeves have a clamping gap of a preset width in the axial direction, so that the clamping sleeves and the shaft core have an interference fit; the clamping sleeve assemblies are also used to connect to fold or unfold the rotating shaft assembly under external force; and

[0007] At least one group of transmission components, each group of the transmission components includes a plurality of gear sleeves, each of the gear sleeves is sleeved on the circumference of one of the shaft cores, and the transmission components and the clamping sleeve components are arranged along the axial direction.

[0008] The embodiment of the present application provides a rotating shaft assembly, which includes at least one group of shaft core assemblies, at least one group of clamping sleeve assemblies, and at least one group of transmission assemblies, each group of shaft core assemblies includes at least three shaft cores arranged in sequence along the width direction; each group of the clamping sleeve assemblies includes a plurality of clamping sleeves, each of the clamping sleeves surrounds a shaft core in the shaft core group, and the clamping sleeves have a clamping gap of a preset width in the axial direction, so that the clamping sleeves and the shaft core have an interference fit; the clamping sleeve assembly is also used to connect the rotating shaft assembly to fold or unfold under external force; the transmission assembly includes a plurality of gear sleeves, each of the gear sleeves is sleeved on the circumferential side of one of the shaft cores, the transmission assembly and the clamping sleeve assembly are arranged in the axial direction, and the plurality of clamping sleeves and the plurality of shaft cores are superimposed on each other to withstand the rotational torque of a display screen of a certain weight. In addition, the design of the three shaft cores reduces the overall thickness of the display screen when it is opened and closed.

[0009] In an optional embodiment, the at least three shaft cores include two edge shaft cores arranged at the edges and a middle shaft core arranged at the middle position;

[0010] The clamping sleeve assembly includes at least one pair of clamping arms symmetrically arranged along the width direction, and a pair of the clamping arms are staggered along the axial direction; each of the clamping arms includes a clamping sleeve and an extension portion connected to the clamping sleeve, and the clamping sleeve of the clamping arm is interference fit with the edge shaft core.

[0011] In an optional embodiment, the clamping sleeve assembly also includes at least one connected clamping sleeve, each of the connected clamping sleeves and one of the clamping arms are arranged along the width direction, and the connected clamping sleeve includes two clamping sleeves, and the clamping sleeve of the clamping arm and the two clamping sleeves of the connected clamping sleeve are respectively sleeved on the two edge shaft cores and one of the middle shaft cores.

[0012] In an optional embodiment, the two clamping sleeves of the integrated clamping sleeve are formed by curling and bending two ends of a plate in opposite directions, and the clamping sleeve of the clamping arm is formed by curling and bending one end of a plate.

[0013] In an optional embodiment, the transmission assembly includes at least one pair of gear arms symmetrically arranged along the width direction, and a pair of the gear arms are staggered along the axial direction; each of the gear arms includes a gear sleeve and a connecting arm connected to the gear sleeve, and the gear sleeve of the gear arm rotates synchronously with one of the edge shaft cores.

[0014] In an optional embodiment, the transmission assembly also includes at least one connected gear, each of the connected gears is arranged along the width direction with one of the gear arms, the connected gears include two gear sleeves, one of the gear sleeves in the connected gears is meshingly connected with the gear sleeve of the gear arm, one of the two gear sleeves of the connected gear is sleeved on the outer periphery of the intermediate shaft core, and the other of the two gear sleeves of the connected gear rotates synchronously with the other edge shaft core.

[0015] In an optional embodiment, a group of the shaft core assemblies, at least one group of the transmission assemblies and at least one group of the clamping sleeve assemblies form a group of connection units;

[0016] The rotating shaft assembly further includes at least one group of connecting rods, and opposite ends of each group of connecting rods along the axial direction are respectively connected to the shaft core assemblies of two adjacent groups of connecting units, and each group of connecting rods includes a plurality of connecting rods arranged along the width direction.

[0017] In an optional embodiment, each of the connecting rods can rotate relative to the shaft core, and the connecting rod has a conducting hole. The conducting holes of a plurality of the connecting rods are connected to form a conducting channel, and the conducting channel is used to pass through the flexible circuit board.

[0018] In an optional embodiment, one end of the shaft core has a rotating portion and a clamping portion, and the radial dimension of the clamping portion is greater than the radial dimension of the rotating portion;

[0019] One end of the connecting rod has a rotating inner cavity and a clamping inner cavity, the radial size of the rotating inner cavity is smaller than the radial size of the clamping inner cavity; the rotating part can rotate around the axial direction in the rotating inner cavity, the clamping part is clamped in the clamping inner cavity, and can rotate around the axial direction in the clamping inner cavity.

[0020] In a second aspect, an embodiment of the present application provides a foldable device, comprising a plurality of display bodies and at least one of the rotating shaft assemblies, each of the rotating shaft assemblies being connected between two adjacent display bodies, the plurality of display bodies comprising a first display body and a second display body, and the plurality of groups of the clamping sleeve assemblies of the rotating shaft assemblies connecting the first display body and the second display body on both sides along the width direction and the plurality of groups of the transmission assemblies on both sides along the width direction, respectively.

[0021] The foldable device provided in the embodiment of the present application comprises a plurality of display bodies and at least one rotating shaft assembly, each of the rotating shaft assembly is connected between two adjacent display bodies, the plurality of display bodies comprises a first display body and a second display body, the plurality of groups of the clamping sleeve assemblies of the rotating shaft assembly are connected to the first display body and the second display body on both sides along the width direction, and the plurality of groups of the transmission assemblies are connected to the first display body and the second display body on both sides along the width direction, respectively, the rotating shaft assembly comprises at least one group of shaft core assemblies, at least one group of clamping sleeve assemblies, and at least one group of transmission assemblies, each group of shaft core assemblies comprises at least three shaft cores arranged in sequence along the width direction; each group of the clamping sleeve assemblies comprises a plurality of clamping sleeves, each of the clamping sleeves surrounds One of the shaft cores in the shaft core group has a clamping gap of preset width in the axial direction of the clamping sleeve, so that the clamping sleeve and the shaft core have an interference fit; the clamping sleeve assembly is also used to connect the shaft assembly to fold or unfold under external force; the transmission assembly includes multiple gear sleeves, each of which is sleeved on the circumference of one of the shaft cores, and the transmission assembly and the clamping sleeve assembly are arranged in the axial direction, and there is a preset friction force between the clamping sleeve and the shaft core. The multiple clamping sleeves cooperate with the multiple shaft cores to withstand the rotational torque of one or more display screens of a certain weight, so as to achieve smooth rotation between the multiple display screens. In addition, the design of three shaft cores reduces the overall thickness of the multiple display screens when they are opened and closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments are briefly introduced below.

[0023] Figure 1 is a structural schematic diagram of a foldable device provided in an embodiment of the present application;

[0024] Figure 2 is a structural schematic diagram of a rotating shaft assembly in a flattened state provided by an embodiment of the present application;

[0025] Figure 3 is a schematic diagram of the structural decomposition of a connecting unit in a rotating shaft assembly provided in an embodiment of the present application;

[0026] Figure 4 is a schematic structural diagram of a tight shaft sleeve assembly provided in an embodiment of the present application;

[0027] Figure 5 is a schematic cross-sectional view of a tight shaft sleeve assembly in a rotating shaft assembly provided in an embodiment of the present application along the width direction;

[0028] Figure 6 is a schematic structural diagram of a foldable device provided in an embodiment of the present application in a 0° folded state;

[0029] Figure 7 is a schematic structural diagram of a foldable device provided in an embodiment of the present application in a 180° flattened state;

[0030] Figure 8 is a schematic structural diagram of a foldable device provided in an embodiment of the present application in a 360° folded state;

[0031] Fig. 9 is a schematic structural diagram of a transmission assembly in a rotating shaft assembly provided in an embodiment of the present application;

[0032] Fig.10 It is a structural schematic diagram of a transmission assembly and a shaft core assembly in a rotating shaft assembly provided in an embodiment of the present application;

[0033] Fig.11 It is a structural schematic diagram of two sets of shaft core assemblies and one set of connecting rods in the rotating shaft assembly provided in an embodiment of the present application;

[0034] Fig.12 It is a partial exploded schematic diagram of the rotating shaft assembly provided in an embodiment of the present application;

[0035] Fig.13 is a schematic diagram of the structure of the shaft core and the connecting rod provided in an embodiment of the present application;

[0036] Fig.14 It is a schematic structural diagram of a conductive channel through which a flexible circuit board passes through a group of connecting rods provided in an embodiment of the present application.

[0037] Description of Figure Numbers:

[0038] Foldable device 1000; display body 200; hinge assembly 100; first display body 200a; second display body 200b; support body 300; connection unit 10; connection rod 40; shaft assembly 11; clamping sleeve assembly 21; transmission assembly 31; first edge shaft core 111; second edge shaft core 112; intermediate shaft core 113; clamping sleeve 21a; gear sleeve 31a; first clamping arm 211; second clamping arm 221; first clamping sleeve 212; first extension 213; second clamping sleeve 222; second extension 223; first conjoined clamping sleeve 231; third clamping sleeve 232; fourth clamping sleeve 233; second conjoined clamping sleeve 241; fifth clamping sleeve 242; sixth clamping sleeve 243; first gear arm 321; second gear arm 331; first gear sleeve 322; third extension 32 3; first gear hole 324; first gear face 325; second gear sleeve 332; fourth extension portion 333; second gear hole 334; first conjoined gear 341; second conjoined gear 351; third gear sleeve 342; fourth gear sleeve 343; fifth gear sleeve 352; sixth gear sleeve 353; second gear face 344; third gear face 354; first plane 324a; first arcuate face 324b; second plane 111a; second arcuate face 111b; third plane 334a; third arcuate face 334b; fourth plane 112a; fourth arcuate face 112b; first edge connecting rod 41; middle connecting rod 43; second edge connecting rod 42; first connecting strip 51; second connecting strip 52; rotating portion 114; engaging portion 115; rotating inner cavity 44; engaging inner cavity 45; conducting hole 46; conducting channel 47; end cap 60. DETAILED DESCRIPTION

[0039] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the embodiments described in the present application are only a part of the embodiments, not all of the embodiments. Based on the embodiments provided in the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present application.

[0040] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it mutually exclusive, independent, or alternative to other embodiments. It can be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0041] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example: a component or device including one or more parts is not limited to the one or more parts listed, but optionally includes one or more parts that are not listed but inherent to the exemplified product, or one or more parts that it should have based on the described function.

[0042] In an electronic device with multiple display screens, multiple display screens can increase the display area. Multiple display screens are connected by rotating shafts, so that the displayed content can be presented at multiple angles. For example, the content on the display screen can be seen from multiple different viewing angles. A rotating shaft is required between multiple display screens to achieve opening and closing. In the process of relative rotation of multiple display screens, an embodiment of the present application provides a rotating shaft assembly and a foldable device that can withstand the rotation torque of a display screen of a certain weight and reduce the overall thickness of the display screen when it is opened and closed.

[0043] See also Figure 1 The foldable device 1000 includes but is not limited to a laptop computer, a desktop display screen, etc. Figure 1 The foldable device 1000 is a notebook computer.

[0044] See also Figure 1 The foldable device 1000 includes a plurality of display bodies 200 and at least one hinge assembly 100. The display body 200 is the aforementioned display screen. The present application does not limit the number of display bodies 200 and hinge assemblies 100. Optionally, each end of the hinge assembly 100 is connected to a display body 200. When the number of hinge assemblies 100 is one, two display bodies 200 can be connected to the two sides of the hinge assembly 100. That is, each of the hinge assemblies 100 is connected between two adjacent display bodies 200. Please refer to Figure 1 Taking the foldable device 1000 as a notebook computer as an example, the plurality of display bodies 200 include a first display body 200a and a second display body 200b. The hinge assembly 100 connects the first display body 200a and the second display body 200b at both sides along the width direction. Figure 1 In the foldable device 1000, the first display body 200a and the second display body 200b are in a flattened state.

[0045] Optional, see Figure 1The foldable device 1000 also includes a support body 300. The support body 300 is provided with components such as a keyboard, a main board, and a battery. The bottom of the first display body 200a is connected to the support body 300 disposed on the desktop, and the side of the first display body 200a is connected to the second display body 200b through the hinge assembly 100. Among them, the second display body 200b is suspended. The internal structure of the hinge assembly 100 generates multiple clamping forces, and the multiple clamping forces are superimposed to provide a relatively large static friction force, which enables the second display body 200 to hover at any rotation angle.

[0046] In other implementations, a plurality of display bodies 200 may be connected to one hinge assembly 100 , and at least two display bodies 200 are disposed along the axial direction of the hinge assembly 100 .

[0047] In other implementations, the hinge assembly 100 may also be connected between the support body 300 and the display body 200 , or in other structures that require relative rotation.

[0048] The specific structure of the rotating shaft assembly 100 is described below with reference to the accompanying drawings.

[0049] See also Figure 2 The shaft assembly 100 includes a plurality of connection units 10 and a connection rod 40 connected between two adjacent groups of the connection units 10 .

[0050] For example, the shaft assembly 100 includes three groups of connection units 10 and two groups of connection rods 40. In the axial direction Y, the first group of connection units 10, the first group of connection rods 40, the second group of connection units 10, the second group of connection rods 40 and the third group of connection units 10 are connected in sequence, and this embodiment is described by taking this as an example.

[0051] Of course, in other embodiments, the shaft assembly 100 includes two groups of connection units 10 and one group of connection rods 40, or four groups of connection units 10 and three groups of connection rods 40. The shaft assembly 100 in other embodiments may refer to the description of this embodiment.

[0052] Optional, see Figure 3 The shaft assembly 100 includes at least one set of shaft core assembly 11, at least one set of clamping sleeve assembly 21 and at least one set of transmission assembly 31. In other words, the connecting unit 10 includes at least one set of shaft core assembly 11, at least one set of clamping sleeve assembly 21 and at least one set of transmission assembly 31.

[0053] For example, each set of connection units 10 includes a set of shaft core components 11 , a set of clamping sleeve components 21 and three sets of transmission components 31 . This embodiment is described by taking this as an example.

[0054] In other embodiments, each group of connecting units 10 includes a group of shaft core components 11, a group of clamping sleeve components 21 and three groups of transmission components 31, or each group of connecting units 10 includes a group of shaft core components 11, a group of clamping sleeve components 21 and two groups of transmission components 31.

[0055] See also Figure 3 Each set of axis core components 11 includes at least three axis cores arranged in sequence along the width direction X. For example, each set of axis core components 11 includes three axis cores arranged in sequence along the width direction X, and the three axis cores include two edge axis cores and an intermediate axis core 113 located in the middle position, wherein the two edge axis cores located in the edge positions are named as the first edge axis core 111 and the second edge axis core 112 respectively. The first edge axis core 111 is located on the side close to the first display body 200a, and the second edge axis core 112 is located on the side close to the second display body 200b.

[0056] See also Figure 1 and Figure 3 , the first display body 200a, the hinge assembly 100 and the second display body 200b are arranged along the width direction X. Each axis core extends along the axial direction of the hinge assembly 100. In other words, the first display body 200a, the first edge axis core 111, the middle axis core 113, the second edge axis core 112 and the second display body 200b are arranged along the width direction X in sequence.

[0057] In other embodiments, each set of shaft core assemblies 11 includes four shaft cores, five shaft cores, etc., which are sequentially arranged along the width direction X. In this way, the number of the intermediate shaft cores 113 located in the middle position is multiple.

[0058] In the present embodiment, each group of axis core assemblies 11 includes three axis cores sequentially arranged along the width direction X, and rotational torque can be formed on the three axis cores to provide a relatively large friction force, thereby supporting the second display body 200b to hover and rotate smoothly at any angle. When folded, the two edge axis cores are close to each other in the thickness direction, and the middle axis core 113 is located on the outside of the two edge axis cores, so that the thickness of the foldable device 1000 is reduced when folded, which is conducive to the thinness of the foldable device 1000.

[0059] See also Figure 2 and Figure 3 Each set of the clamping sleeve assemblies 21 includes a plurality of clamping sleeves 21a.

[0060] See also Figure 2 and Figure 3 Each of the clamping sleeves 21 a surrounds a core in a group of the core assemblies 11 , such as the first edge core 111 , the middle core 113 , or the second edge core 112 .

[0061] See also Figure 4 and Figure 5 The clamping sleeve 21a has a clamping gap h of a preset width in the axial direction, and the clamping gap h of the preset width enables the clamping sleeve 21a to have an interference fit with the shaft core. The clamping gaps h on each clamping sleeve 21a can be the same or different.

[0062] Specifically, the clamping sleeve 21a is an unclosed sleeve formed by bending around the axial direction. The clamping sleeve 21a is sleeved on the outer peripheral side of the shaft core, and a clamping gap h is formed at the unclosed position. The two ends of the clamping gap h of the clamping sleeve 21a in the circumferential direction respectively abut against the outer peripheral wall of the shaft core to form an interference fit.

[0063] Optionally, line-surface contact is formed between the clamping sleeve 21a and the outer peripheral wall of the shaft core. This contact mode enables the rotating shaft assembly 100 to have better stability in use and a longer service life.

[0064] Of course, in other embodiments, a groove can be provided at the position where the outer peripheral wall of the shaft core abuts against the clamping sleeve 21a, and the end of the clamping sleeve 21a is provided in the groove, so that the shaft core and the clamping sleeve 21a have a stronger bite force.

[0065] Optional, see Figures 1 to 3 When the second display body 200b is suspended on the side of the first display body 200a, each clamping sleeve 21a forms a static friction force along the axial direction with the outer peripheral wall of the shaft core. The static friction forces on the outer peripheral wall of all clamping sleeves 21a and the shaft core are superimposed to form a larger static friction force upward in the axial direction. The static friction force offsets the gravity of the second display body 200b to ensure that the second display body 200b is suspended on the side of the first display body 200a.

[0066] Among them, the clamping sleeve 21a is designed to be an unclosed sleeve formed by bending around the axial direction, so that the clamping force on the clamping sleeve 21a and the outer peripheral wall of the shaft core can be adjusted by adjusting the preset width of the clamping gap h, so as to adjust the supporting force that the hinge assembly 100 can provide to make the second display body 200b suspend.

[0067] The present embodiment does not specifically limit the preset width, and satisfies that the sum of the static friction forces between the clamping sleeve 21a and the outer peripheral wall of the shaft core is greater than the gravity of the second display body 200b. The smaller the preset width, the greater the clamping force between the clamping sleeve 21a and the outer peripheral wall of the shaft core, the greater the static friction between the clamping sleeve 21a and the outer peripheral wall of the shaft core, and the greater the support force that the hinge assembly 100 can provide to suspend the second display body 200b.

[0068] Of course, in other embodiments, the clamping sleeve 21a may be in a cylindrical state of a closed structure, and the outer peripheral wall where the shaft core contacts the clamping sleeve 21a is a cylindrical surface.

[0069] In this embodiment, the clamping sleeve 21a is designed to be an unclosed sleeve formed by bending around the axial direction. The clamping sleeve 21a can be formed by a bending process, which can save costs compared to the clamping sleeve 21a being formed into a closed structure by mold molding.

[0070] See also Figures 1 to 3 The multiple groups of the clamping sleeve assemblies 21 of the rotating shaft assembly 100 are connected to the first display body 200a and the second display body 200b on both sides along the width direction X, and the multiple groups of the transmission assemblies 31 are connected to the first display body 200a and the second display body 200b on both sides along the width direction X, respectively.

[0071] See also Figures 6 to 8 The clamping sleeve assembly 21 is also used to connect the rotating shaft assembly 100 to fold or unfold under external force. Specifically, when the operator rotates the second display body 200b, the second display body 200b drives one side of the clamping sleeve assembly 21 and the second edge shaft core 112 to rotate together, and the second edge shaft core 112 drives the middle shaft core 113 to rotate together, until the second display body 200b and the first display body 200a are in a 0° folded state, a 180° unfolded state, or a 360° folded state.

[0072] See also Figure 2 , the transmission assembly 31 includes a plurality of gear sleeves 31a. Each of the gear sleeves 31a is sleeved on the circumference of one of the shaft cores. The number of the plurality of gear sleeves 31a is at least three, and the three gear sleeves 31a are sleeved on the outer circumference of the three shaft cores respectively to guide the rotation of the three shaft cores. The transmission assembly 31 and the clamping sleeve assembly 21 are arranged along the axial direction Y, and the transmission assembly 31 guides the rotation trajectory of the clamping sleeve assembly 21 during the opening and closing process. For example, the middle shaft core 113 rotates around the central axis of the first edge shaft core 111 with the second edge shaft core 112, and the second edge shaft core 112 also rotates around the central axis of the middle shaft core 113 to realize the second display body 200b rotating around the side of the first display body 200a, and when the second display body 200b and the second display body 200b are folded, the second edge shaft core 112 and the first edge shaft core 111 are opposite in the thickness direction, and the first display body 200a and the second display body 200b are roughly parallel.

[0073] The rotating shaft assembly 100 provided in the embodiment of the present application comprises at least one set of shaft core assembly 11, at least one set of clamping sleeve assembly 21, and at least one set of transmission assembly 31. Each set of shaft core assembly 11 comprises at least three shaft cores arranged in sequence along the width direction X. Each set of the clamping sleeve assembly 21 comprises a plurality of clamping sleeves 21a, each of which surrounds a shaft core in the shaft core group. The clamping sleeve 21a has a clamping gap h of a preset width in the axial direction, so that the clamping sleeve 21a and the shaft core are interference fit. The clamping sleeve assembly 21 is also used for connecting The rotating shaft assembly 100 is folded or unfolded under external force; the transmission assembly 31 includes a plurality of gear sleeves 31a, each of which is sleeved on the circumference of one of the shaft cores, and the transmission assembly 31 and the clamping sleeve assembly 21 are arranged along the axial direction Y, and the clamping sleeve 21a has a clamping gap h of a preset width, so that there is a preset friction force between the clamping sleeve 21a and the shaft core, and the plurality of clamping sleeves 21a cooperate with the plurality of shaft cores to withstand the rotational torque of a display screen of a certain weight. In addition, the design of the three shaft cores reduces the overall thickness of the display screen when it is opened and closed.

[0074] Optional, see Figure 4 The clamping sleeve assembly 21 includes at least one pair of clamping arms symmetrically arranged along the width direction X. The pair of clamping arms are staggered along the axial direction Y. Each clamping arm includes a clamping sleeve 21a and an extension connected to the clamping sleeve 21a. The clamping sleeve 21a of the clamping arm is interference fit with the edge shaft core. The clamping sleeve 21a of the clamping arm is formed by curling and bending one end of a plate.

[0075] In this embodiment, a pair of clamping arms symmetrically arranged along the width direction X are named as the first clamping arm 211 and the second clamping arm 221. The first clamping arm 211 includes a first clamping sleeve 212 and a first extension portion 213 connected to each other. Optionally, the first clamping sleeve 212 and the first extension portion 213 are interconnected as a whole. Further, the first clamping sleeve 212 of the first clamping arm 211 can be formed by curling and bending one end of a plate. For example, the first clamping arm 211 includes a first end and a second end along the width direction X, and the first end of the first clamping arm 211 is curled and bent toward the side where the second end is located. After curling and bending, the first end of the first clamping arm 211 forms a clamping gap h of a preset width with the uncurled surface of the plate. The portion of the plate that is not curled and bent forms the first extension portion 213. The first extension portion 213 extends toward a side away from the intermediate shaft core 113.

[0076] Optional, see Figure 4, the clamping sleeve 21a of the second clamping arm 221 is interference fit with the second edge shaft core 112. The second clamping arm 221 includes a second clamping sleeve 222 and a second extension 223 connected to each other. Optionally, the second clamping sleeve 222 and the second extension 223 are interconnected as a whole. Further, the second clamping sleeve 222 of the second clamping arm 221 can be formed by curling and bending one end of a plate. For example, the second clamping arm 221 includes a third end and a fourth end along the width direction X, and the third end of the second clamping arm 221 is curled and bent toward the side where the fourth end is located. After curling and bending, the third end of the second clamping arm 221 forms a clamping gap h of a preset width with the uncurled surface of the plate. The portion of the plate that is not curled and bent forms the second extension 223. The second extension 223 extends toward a side away from the middle shaft core 113.

[0077] The present application does not specifically limit the curling and bending direction of the clamping sleeve 21a of the first clamping arm 211 and the curling and bending direction of the clamping sleeve 21a of the second clamping arm 221. Optionally, the clamping sleeve 21a of the first clamping arm 211 and the clamping sleeve 21a of the second clamping arm 221 are both curled and bent toward the same side of the rotating shaft assembly 100. Optionally, the clamping sleeve 21a of the first clamping arm 211 and the clamping sleeve 21a of the second clamping arm 221 are respectively curled and bent toward different sides of the rotating shaft assembly 100.

[0078] The first clamping arm 211 and the second clamping arm 221 are staggered in the axial direction Y. Further, a transmission assembly 31 is arranged between the first clamping arm 211 and the second clamping arm 221 in the axial direction Y. In the flattened state, the first extension portion 213 of the first clamping arm 211 and the second extension portion 223 of the second clamping arm 221 extend toward both sides in the width direction X. Further, the first extension portion 213 is connected to the first display body 200a, and the second extension portion 223 is connected to the second display body 200b. The connection described in the present application includes direct connection or indirect connection.

[0079] See also Figure 4 The clamping sleeve assembly 21 also includes at least one integrated clamping sleeve.

[0080] Each of the integrated clamping sleeves is arranged along the width direction X with one of the clamping arms.

[0081] The integrated clamping sleeve includes two clamping sleeves 21a. The clamping sleeve 21a of the clamping arm and the two clamping sleeves 21a of the integrated clamping sleeve are respectively sleeved on the two edge shaft cores and one middle shaft core 113.

[0082] For example, see Figure 4At least one conjoined clamping sleeve includes a first conjoined clamping sleeve 231 and a second conjoined clamping sleeve 241. The first conjoined clamping sleeve 231 includes a third clamping sleeve 232 and a fourth clamping sleeve 233. The second conjoined clamping sleeve 241 includes a fifth clamping sleeve 242 and a sixth clamping sleeve 243.

[0083] The first integrated clamping sleeve 231 and the first clamping arm 211 are arranged along the width direction X. The first clamping sleeve 212 , the third clamping sleeve 232 and the fourth clamping sleeve 233 are respectively interference-fitted with the first edge shaft core 111 , the middle shaft core 113 and the second edge shaft core 112 .

[0084] The second integrated clamping sleeve 241 and the second clamping arm 221 are arranged along the width direction X. The second clamping sleeve 222 , the fifth clamping sleeve 242 and the sixth clamping sleeve 243 are respectively interference fit with the first edge shaft core 111 , the middle shaft core 113 and the second edge shaft core 112 .

[0085] The combination of the first integrated clamping sleeve 231 and the first clamping arm 211 and the combination of the second integrated clamping sleeve 241 and the second clamping arm 221 are sequentially arranged along the axial direction Y. In this way, the first clamping arm 211 and the second clamping arm 221 are staggered in the axial direction.

[0086] The two clamping sleeves 21a of the one-piece clamping sleeve are formed by curling and bending the two ends of a plate in opposite directions. For example, the two ends of the one-piece clamping sleeve in the width direction X are curled and bent around the axial direction and in opposite directions to obtain the two clamping sleeves 21a of the one-piece clamping sleeve. The clamping gaps h of the two clamping sleeves 21a of the one-piece clamping sleeve are in opposite directions.

[0087] Among the first and second integrated clamping sleeves 231 and 241 , the clamping gap h of the third clamping sleeve 232 and the clamping gap h of the fifth clamping sleeve 242 sleeved on the intermediate shaft core 113 may be oriented in the same or opposite directions.

[0088] The structure of the transmission assembly 31 is described below with reference to the accompanying drawings.

[0089] See also Fig. 9 The transmission assembly 31 includes at least one pair of gear arms symmetrically arranged along the width direction X. The pair of gear arms are staggered along the axial direction Y. Each gear arm includes a gear sleeve 31a and a connecting arm connected to the gear sleeve 31a.

[0090] The gear sleeve 31a of the gear arm rotates synchronously with one of the edge shaft cores.

[0091] See also Fig. 9In this embodiment, a pair of gear arms symmetrically arranged along the width direction X are named as the first gear arm 321 and the second gear arm 331. Among them, the first gear arm 321 includes a first gear sleeve 322 and a third extension portion 323 connected to each other. Optionally, the first gear sleeve 322 and the third extension portion 323 are interconnected as a whole. The first gear sleeve 322 has an axial first gear hole 324. The first gear sleeve 322 is arranged on the outer periphery of the first edge shaft core 111. The third extension portion 323 extends toward a side away from the middle shaft core 113. The outer peripheral surface of the first gear sleeve 322 has a first gear surface 325.

[0092] See also Fig. 9 The second gear arm 331 includes a second gear sleeve 332 and a fourth extension portion 333 connected to each other. Optionally, the second gear sleeve 332 and the fourth extension portion 333 are interconnected as a whole. The second gear sleeve 332 has an axial second gear hole 334. The second gear sleeve 332 is arranged on the outer periphery of the second edge shaft core 112. The fourth extension portion 333 extends toward a side away from the middle shaft core 113. The outer peripheral surface of the second gear sleeve 332 has a gear surface.

[0093] In the flattened state, the third extension portion 323 and the fourth extension portion 333 extend toward both sides in the width direction X. Further, the third extension portion 323 is connected to the first display body 200a. The fourth extension portion 333 is connected to the second display body 200b. The connection described in this application includes direct connection or indirect connection.

[0094] See also Fig. 9 , the transmission assembly 31 also includes at least one connected gear.

[0095] Each of the connected gears is arranged along the width direction X with one of the gear arms.

[0096] The conjoined gear includes two gear sleeves 31a. One gear sleeve 31a of the conjoined gear is meshedly connected with the gear sleeve 31a of the gear arm. One of the two gear sleeves 31a of the conjoined gear is sleeved on the outer periphery of the intermediate shaft core 113. The other of the two gear sleeves 31a of the conjoined gear rotates synchronously with the other edge shaft core.

[0097] For example, see Fig. 9 At least one conjoined gear includes a first conjoined gear 341 and a second conjoined gear 351. The first conjoined gear 341 includes a third gear shaft sleeve 342 and a fourth gear shaft sleeve 343. The second conjoined gear 351 includes a fifth gear shaft sleeve 352 and a sixth gear shaft sleeve 353.

[0098] See also Fig. 9The first conjoined gear 341 and the first gear arm 321 are arranged along the width direction X. The first conjoined gear 341 has a second gear surface 344 on one side facing the first gear arm 321. The second gear surface 344 of the first conjoined gear 341 is meshedly connected with the first gear surface 325 of the first gear arm 321.

[0099] The first gear sleeve 322 , the third gear sleeve 342 and the fourth gear sleeve 343 are sleeved on the circumference of the first edge shaft core 111 , the middle shaft core 113 and the second edge shaft core 112 respectively.

[0100] See also Fig. 9 The second conjoined gear 351 and the second gear arm 331 are arranged along the width direction X. The second conjoined gear 351 has a third gear surface 354 on the side facing the second gear arm 331. The second gear sleeve 332, the fifth gear sleeve 352 and the sixth gear sleeve 353 are sleeved on the circumference of the first edge shaft core 111, the middle shaft core 113 and the second edge shaft core 112 respectively.

[0101] A row of gears formed by the first conjoined gear 341 and the first gear arm 321 and a row of gears formed by the second conjoined gear 351 and the second gear arm 331 are disposed adjacent to each other along the axial direction Y. Thus, the first gear arm 321 and the second gear arm 331 are staggered in the axial direction.

[0102] Optionally, the first gear hole 324 of the first gear arm 321 is a cylindrical hole, and the second gear hole 334 of the second gear arm 331 is a cylindrical hole. Accordingly, the outer peripheral surface of the shaft core is a cylindrical surface with a diameter slightly smaller than the corresponding gear hole.

[0103] In another alternative embodiment, see Fig.10 The hole wall of the first gear hole 324 of the first gear arm 321 includes at least one first plane 324a and at least one first arcuate surface 324b connected in a ring shape. Correspondingly, the outer peripheral surface of the first edge shaft core 111 includes at least one second plane 111a and at least one second arcuate surface 111b connected end to end. The size of the first edge shaft core 111 is less than the size of the corresponding gear hole. Specifically, the hole wall of the first gear hole 324 of the first gear arm 321 includes two planes and two arcuate surfaces arranged opposite to each other. The outer peripheral surface of the shaft core includes two planes and two arcuate surfaces arranged opposite to each other.

[0104] In this embodiment, the hole wall of the first gear hole 324 is designed to include at least one plane, and the outer peripheral surface of the shaft core includes at least one plane. The hole wall of the first gear hole 324 and the outer peripheral surface of the shaft core are plane-to-plane relative to each other, thereby preventing the second edge shaft core 112 and the second gear arm 331 from rotating relative to each other, and allowing the first edge shaft core 111 and the first gear arm 321 to rotate synchronously.

[0105] In another alternative embodiment, see Fig.10 , the hole wall of the second gear hole 334 of the second gear arm 331 includes at least one third plane 334a and at least one third arcuate surface 334b ​​connected in a ring shape, and correspondingly, the outer peripheral surface of the second edge shaft core 112 includes at least one fourth plane 112a and at least one fourth arcuate surface 112b connected end to end, and the size of the second edge shaft core 112 is less than the size of the corresponding gear hole. Specifically, the hole wall of the second gear hole 334 of the second gear arm 331 includes two planes and two arcuate surfaces arranged oppositely. The outer peripheral surface of the second edge shaft core 112 includes two planes and two arcuate surfaces arranged oppositely.

[0106] In this embodiment, the hole wall of the second gear hole 334 is designed to include at least one plane, and the outer peripheral surface of the shaft core includes at least one plane. The hole wall of the second gear hole 334 and the outer peripheral surface of the shaft core are plane-to-plane relative to each other, thereby preventing the second edge shaft core 112 and the second gear arm 331 from rotating relative to each other, and allowing the second edge shaft core 112 and the second gear arm 331 to rotate synchronously.

[0107] The present application does not limit the first gear holes 324 of all first gear arms 321 sleeved on the first edge axis core 111 to be plane-to-plane opposite. The first gear holes 324 of one first gear arm 321 sleeved on the first edge axis core 111 or the first gear holes 324 of two gear arms are plane-to-plane opposite, and the first gear holes 324 of other first gear arms 321 sleeved on the first edge axis core 111 are round hole surfaces.

[0108] Optionally, the gear holes of the first conjoined gear 341 and the second conjoined gear 351 are both cylindrical holes.

[0109] Optionally, a group of the shaft core components 11, at least one group of the transmission components 31 and at least one group of the clamping sleeve components 21 form a group of connection units 10. For example, three groups of the transmission components 31 and a group of the clamping sleeve 21a are all sleeved on a group of the shaft core components 11 to form a group of connection units 10. Specifically, a first group of transmission components 31, a group of the first clamping arm 211 and the first conjoined clamping sleeve 231 of the clamping shaft, a second group of transmission components 31, a group of the second clamping arm 221 and the second conjoined clamping sleeve 241 of the clamping shaft, and a third transmission component 31. Each group of transmission components 31 includes a first gear arm 321, a first conjoined gear 341, a second gear arm 331, and a second conjoined gear 351.

[0110] See also Figure 2The rotating shaft assembly 100 further includes at least one group of connecting rods 40. The two opposite ends of each group of connecting rods 40 along the axial direction are respectively connected to the shaft core assemblies 11 of two adjacent groups of connecting units 10. Each group of connecting rods 40 includes a plurality of connecting rods 40 arranged along the width direction X.

[0111] For example, the shaft assembly 100 includes three groups of connection units 10 and two groups of connection rods 40, wherein the first group of connection units 10, the first group of connection rods 40, the second group of connection units 10, the second group of connection rods 40 and the third group of connection units 10 are sequentially arranged along the axial direction.

[0112] For example, see Fig.11 Each group of connecting rods 40 includes a first edge connecting rod 41, an intermediate connecting rod 43 and a second edge connecting rod 42. The two ends of the first edge connecting rod 41 are respectively connected to the first edge shaft cores 111 in two adjacent connecting units 10. The two ends of the intermediate connecting rod 43 are respectively connected to the intermediate shaft cores 113 in two adjacent connecting units 10. The two ends of the second edge connecting rod 42 are respectively connected to the second edge shaft cores 112 in two adjacent connecting units 10.

[0113] Optional, see Fig.12 The shaft assembly 100 further includes a first connecting bar 51 and a second connecting bar 52, which are respectively arranged on both sides of the connecting unit 10, and the gear arms and clamping arms on the side where the first connecting bar 51 is located in all the connecting units 10 are fixedly connected to the first connecting bar 51. The gear arms and clamping arms on the side where the second connecting bar 52 is located in all the connecting units 10 are fixedly connected to the second connecting bar 52.

[0114] See also Figure 6When the rotating shaft assembly 100 is in the 0° folded state, the display surface of the second display body 200b is opposite to the display surface of the first display body 200a in the thickness direction. At this time, the first gear sleeve 322 of the first gear arm 321 and the fourth gear sleeve 343 of the first conjoined gear 341 are directly opposite or nearly directly opposite in the thickness direction. For example, the third gear sleeve 342 of the first conjoined gear 341 is located outside the first gear sleeve 322 of the first gear arm 321 and the fourth gear sleeve 343 of the first conjoined gear 341. The first clamping sleeve 212 of the first clamping arm 211 and the fourth clamping sleeve 233 of the first conjoined clamping sleeve 231 are directly opposite or nearly directly opposite in the thickness direction. For example, the third clamping sleeve 232 of the first conjoined clamping sleeve 231 is located outside the first clamping sleeve 212 of the first clamping arm 211 and the fourth clamping sleeve 233 of the first conjoined clamping sleeve 231. The second gear sleeve 332 of the second gear arm 331 and the sixth gear sleeve 353 of the second conjoined gear 351 are directly opposite or nearly directly opposite in the thickness direction. For example, the fifth gear sleeve 352 of the second conjoined gear 351 is located outside the second gear sleeve 332 of the second gear arm 331 and the sixth gear sleeve 353 of the second conjoined gear 351. The second clamping sleeve 222 of the second clamping arm 221 and the sixth clamping sleeve 243 of the second conjoined clamping sleeve 241 are directly opposite or nearly directly opposite in the thickness direction. For example, the fifth clamping sleeve 242 of the second conjoined clamping sleeve 241 is located outside the second clamping sleeve 222 of the second clamping arm 221 and the sixth clamping sleeve 243 of the second conjoined clamping sleeve 241. At this time, the gap between the first display body 200a and the second display body 200b is small, and the thickness of the foldable device 1000 in the 0° folded state is small.

[0115] See also Figure 7 When the rotating shaft assembly 100 is in a 180° flattened state, the display surface of the second display body 200b is arranged nearly coplanar with the display surface of the first display body 200a. At this time, the first gear sleeve 322 of the first gear arm 321, the third gear sleeve 342 of the first conjoined gear 341 and the fourth gear sleeve 343 of the first conjoined gear 341 are arranged substantially colinearly along the axis of the width direction X. The first clamping sleeve 212 of the first clamping arm 211, the third clamping sleeve 232 of the first conjoined clamping sleeve 231 and the fourth clamping sleeve 233 of the first conjoined clamping sleeve 231 are arranged substantially colinearly along the axis of the width direction X. The second gear sleeve 332 of the second gear arm 331, the fifth gear shaft of the second conjoined gear 351 and the sixth gear sleeve 353 of the second conjoined gear 351 are arranged substantially colinearly along the axis of the width direction X. The second clamping sleeve 222 of the second clamping arm 221 , the fifth clamping sleeve 242 of the second integrated clamping sleeve 241 , and the sixth clamping sleeve 243 of the second integrated clamping sleeve 241 are arranged substantially colinearly along the axis of the width direction X.

[0116] See also Figure 8 When the hinge assembly 100 is in a 360° folded state, the display surface of the second display body 200b and the display surface of the first display body 200a are opposite to each other in the thickness direction. At this time, the first gear sleeve 322 of the first gear arm 321 and the fourth gear sleeve 343 of the first conjoined gear 341 are directly opposite or nearly directly opposite in the thickness direction. For example, the third gear sleeve 342 of the first conjoined gear 341 is located outside the first gear sleeve 322 of the first gear arm 321 and the fourth gear sleeve 343 of the first conjoined gear 341. The first clamping sleeve 212 of the first clamping arm 211 and the fourth clamping sleeve 233 of the first conjoined clamping sleeve 231 are directly opposite or nearly directly opposite in the thickness direction. For example, the third clamping sleeve 232 of the first conjoined clamping sleeve 231 is located outside the first clamping sleeve 212 of the first clamping arm 211 and the fourth clamping sleeve 233 of the first conjoined clamping sleeve 231. The second gear sleeve 332 of the second gear arm 331 and the sixth gear sleeve 353 of the second conjoined gear 351 are directly opposite or nearly directly opposite in the thickness direction. For example, the fifth gear sleeve 352 of the second conjoined gear 351 is located outside the second gear sleeve 332 of the second gear arm 331 and the sixth gear sleeve 353 of the second conjoined gear 351. The second clamping sleeve 222 of the second clamping arm 221 and the sixth clamping sleeve 243 of the second conjoined clamping sleeve 241 are directly opposite or nearly directly opposite in the thickness direction. For example, the fifth clamping sleeve 242 of the second conjoined clamping sleeve 241 is located outside the second clamping sleeve 222 of the second clamping arm 221 and the sixth clamping sleeve 243 of the second conjoined clamping sleeve 241. At this time, the gap between the first display body 200a and the second display body 200b is small, and the thickness of the foldable device 1000 in the 360° folded state is small.

[0117] See also Fig.13 Each of the connecting rods 40 can rotate freely in the circumferential direction relative to the shaft core. The connecting rod 40 is engaged with the shaft core in the axial direction. One end of the shaft core has a rotating portion 114 and an engaging portion 115. The engaging portion 115 is located at the outermost end. The diameter of the rotating portion 114 is smaller than the diameter of the main body of the shaft core. The radial dimension of the engaging portion 115 is larger than the radial dimension of the rotating portion 114.

[0118] See also Fig.13One end of the connecting rod 40 has a rotating inner cavity 44 and a snap-fit ​​inner cavity 45. The snap-fit ​​inner cavity 45 is located near the end. The radial dimension of the rotating inner cavity 44 is smaller than the radial dimension of the snap-fit ​​inner cavity 45. The rotating portion 114 can rotate around the axial direction in the rotating inner cavity 44. The radial dimension of the snap-fit ​​portion 115 is larger than the radial dimension of the rotating inner cavity 44. The snap-fit ​​portion 115 is snap-fitted into the snap-fit ​​inner cavity 45 and can rotate around the axial direction in the snap-fit ​​inner cavity 45. The above design enables the connecting rod 40 to rotate freely in the circumferential direction relative to the shaft core, and the connecting rod 40 is snap-fitted with the shaft core in the axial direction.

[0119] For further information, see Fig.12 and Fig.14 The connecting rod 40 has a conducting hole 46. The conducting holes 46 of the connecting rods 40 are connected to form a conducting channel 47. The conducting channel 47 is used to pass through the flexible circuit board 70.

[0120] The foldable device 1000 further includes a flexible circuit board 70. Optionally, the flexible circuit board 70 is electrically connected to the first display body 200a and the second display body 200b to achieve synchronous display of the first display body 200a and the second display body 200b. Optionally, the flexible circuit board 70 is electrically connected to the second display body 200b and the circuit board in the supporting body 300, etc., to achieve synchronous display or independent display of the first display body 200a and the second display body 200b.

[0121] The flexible circuit board 70 extends through the first display body 200a toward the second display body 200b, and the portion of the flexible circuit board 70 passing through the hinge assembly 100 passes through the conducting channel 47, which hides the flexible circuit board 70 on the one hand and provides display signals for the second display body 200b on the other hand.

[0122] Optionally, the opening of the via hole 46 is chamfered and polished to make the wall surface of the opening of the via hole 46 and the wall surface inside the via hole 46 transition to an arc surface to avoid physical wear of the edges and corners on the flexible circuit board 70.

[0123] Optionally, the connecting rod 40 can rotate freely in the circumferential direction relative to the shaft core, so during the bending of the shaft assembly 100, the connecting rod 40 can rotate along with the bending of the flexible circuit board 70, so that the path of the conductive channel 47 changes along with the bending of the flexible circuit board 70.

[0124] Optional, see Fig.12 The shaft assembly 100 further includes a plurality of end caps 60, which are sleeved on each end of the shaft core at both ends of the shaft assembly 100 along the axial direction to achieve sealing and decoration.

[0125] Optionally, the material of the shaft assembly 100 is not specifically limited, and the shaft assembly 100 is made of a material with relatively high structural rigidity, such as steel, stainless steel, alloy, carbon fiber, etc.

[0126] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application, and these improvements and modifications are also regarded as the scope of protection of the present application.

Claims

1. A rotating shaft assembly, characterized in that: include: At least one set of shaft core components, each set of shaft core components includes at least three shaft cores arranged in sequence along the width direction; and At least one group of clamping sleeve assemblies, each group of the clamping sleeve assemblies includes a plurality of clamping sleeves, each of the clamping sleeves surrounds a shaft core in the shaft core group, and the clamping sleeves have a clamping gap of a preset width in the axial direction, so that the clamping sleeves and the shaft core have an interference fit; the clamping sleeve assemblies are also used to connect to fold or unfold the rotating shaft assembly under external force; and At least one group of transmission components, each group of the transmission components includes a plurality of gear sleeves, each of the gear sleeves is sleeved on the circumference of one of the shaft cores, and the transmission components and the clamping sleeve components are arranged along the axial direction.

2. The shaft assembly according to claim 1, characterized in that: The at least three shaft cores include two edge shaft cores arranged at the edges and a middle shaft core arranged at the middle position; The clamping sleeve assembly includes at least one pair of clamping arms symmetrically arranged along the width direction, and a pair of the clamping arms are staggered along the axial direction; each of the clamping arms includes a clamping sleeve and an extension portion connected to the clamping sleeve, and the clamping sleeve of the clamping arm is interference fit with the edge shaft core.

3. The shaft assembly according to claim 2, characterized in that: The clamping sleeve assembly also includes at least one connected clamping sleeve, each of the connected clamping sleeves and one of the clamping arms are arranged along the width direction, the connected clamping sleeve includes two clamping sleeves, the clamping sleeve of the clamping arm and the two clamping sleeves of the connected clamping sleeve are respectively sleeved on the two edge shaft cores and one of the middle shaft cores.

4. The shaft assembly according to claim 3, characterized in that: The two clamping sleeves of the integrated clamping sleeve are formed by curling and bending the two ends of a plate in opposite directions, and the clamping sleeve of the clamping arm is formed by curling and bending one end of a plate.

5. The shaft assembly according to claim 2, characterized in that: The transmission assembly includes at least one pair of gear arms symmetrically arranged along the width direction, and a pair of the gear arms are staggered along the axial direction; each of the gear arms includes a gear sleeve and a connecting arm connected to the gear sleeve, and the gear sleeve of the gear arm rotates synchronously with one of the edge shaft cores.

6. The shaft assembly according to claim 5, characterized in that: The transmission assembly also includes at least one connected gear, each of the connected gears is arranged along the width direction with one of the gear arms, the connected gears include two gear sleeves, one of the gear sleeves in the connected gears is meshedly connected with the gear sleeve of the gear arm, one of the two gear sleeves of the connected gear is sleeved on the outer periphery of the intermediate shaft core, and the other of the two gear sleeves of the connected gear rotates synchronously with the other edge shaft core.

7. The shaft assembly according to claim 1, characterized in that: A group of the shaft core components, at least one group of the transmission components and at least one group of the clamping sleeve components form a connection unit; The rotating shaft assembly further includes at least one group of connecting rods, and opposite ends of each group of connecting rods along the axial direction are respectively connected to the shaft core assemblies of two adjacent groups of connecting units, and each group of connecting rods includes a plurality of connecting rods arranged along the width direction.

8. The shaft assembly according to claim 7, characterized in that: Each of the connecting rods can rotate relative to the shaft core. The connecting rod has a conducting hole. The conducting holes of a plurality of the connecting rods are connected to form a conducting channel. The conducting channel is used to pass through the flexible circuit board.

9. The shaft assembly according to claim 7, characterized in that: One end of the shaft core has a rotating portion and a clamping portion, and the radial dimension of the clamping portion is larger than the radial dimension of the rotating portion; One end of the connecting rod has a rotating inner cavity and a clamping inner cavity, the radial size of the rotating inner cavity is smaller than the radial size of the clamping inner cavity; the rotating part can rotate around the axial direction in the rotating inner cavity, the clamping part is clamped in the clamping inner cavity, and can rotate around the axial direction in the clamping inner cavity.

10. A foldable device, characterized in that: It comprises a plurality of display bodies and at least one rotating shaft assembly as described in any one of claims 1 to 9, each of the rotating shaft assemblies being connected between two adjacent display bodies, the plurality of display bodies comprising a first display body and a second display body, and the plurality of groups of the clamping sleeve assemblies of the rotating shaft assembly being connected to the first display body and the second display body on both sides along the width direction and the plurality of groups of the transmission assemblies being connected to the first display body and the second display body on both sides along the width direction, respectively.

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