Rotating shaft mechanism, foldable shell and foldable electronic equipment

Abstract

The invention provides a rotating shaft mechanism, a foldable shell and foldable electronic equipment. The rotating shaft mechanism comprises a base, a rotating shaft assembly, a synchronization assembly and a torsion assembly. The rotating shaft assembly comprises a first connecting shaft, a second connecting shaft, a first connecting rod arm and a second connecting rod arm. The first rotary connecting part of the first connecting rod arm is arranged on the first connecting shaft in a sleeving mode and rotationally connected with the base through the first connecting shaft. The second rotary connecting part of the second connecting rod arm is arranged on the second connecting shaft in a sleeving mode and rotationally connected with the base through the second connecting shaft. The synchronous assembly is arranged between the first rotary connecting part and the second rotary connecting part and matched with the first rotary connecting part and the second rotary connecting part. The torsion assembly is arranged between the first rotating connecting part and the second rotating connecting part, and the torsion assembly and the synchronous assembly are arranged in the axial direction of the rotating shaft mechanism. The torsion assembly is used for generating radial extrusion force. According to the rotating shaft mechanism, the foldable shell and the foldable electronic equipment provided by the invention, the torsion can be increased, and the synchronism can be improved.

Description

Technical Field

[0001] The present application relates to the field of electronic technologies, and particularly to a rotating shaft mechanism, a foldable housing, and a foldable electronic device. Background Art

[0002] With the development of miniaturization of electronic devices, there are technical problems of insufficient torsion and poor rotational synchronization on both sides in the rotating shaft mechanism of foldable electronic devices. Summary of the Invention

[0003] The present application provides a rotating shaft mechanism, a foldable housing, and a foldable electronic device that can increase torsion and improve rotational synchronization on both sides.

[0004] On the one hand, the present application provides a rotating shaft mechanism, including:

[0005] A base;

[0006] A rotating shaft assembly, including a first connecting shaft, a second connecting shaft, a first connecting rod arm, and a second connecting rod arm. The first connecting rod arm and the second connecting rod arm are disposed on opposite sides of the base. The first connecting rod arm includes a first rotating connection portion, and the first rotating connection portion is sleeved on the first connecting shaft and rotatably connected to the base through the first connecting shaft. The second connecting rod arm includes a second rotating connection portion, and the second rotating connection portion is sleeved on the second connecting shaft and rotatably connected to the base through the second connecting shaft;

[0007] A synchronization assembly, disposed between the first rotating connection portion and the second rotating connection portion and cooperating with the first rotating connection portion and the second rotating connection portion. The synchronization assembly is used to make the first connecting rod arm and the second connecting rod arm rotate synchronously relative to the base; and

[0008] A torsion assembly, disposed between the first rotating connection portion and the second rotating connection portion and arranged axially along the rotating shaft mechanism with the synchronization assembly. The torsion assembly generates a radial extrusion force on the first connecting rod arm and / or the second connecting rod arm during the rotation of the first connecting rod arm and the second connecting rod arm relative to the base.

[0009] On the other hand, the present application further provides a foldable housing, including a first housing, a second housing, and the rotating shaft mechanism described above. The first housing is disposed on one side of the rotating shaft mechanism, and the second housing is disposed on the other side of the rotating shaft mechanism. The first housing and the second housing can move towards each other to fold, or the first housing and the second housing can move away from each other to unfold.

[0010] In another aspect, the present application also provides a foldable electronic device, including a flexible display screen and the foldable housing described above. The flexible display screen includes a first non-bending display area, a bending display area, and a second non-bending display area arranged in sequence. The first non-bending display area covers the first housing, the bending display area covers the rotating shaft mechanism, and the second non-bending display area covers the second housing.

[0011] The rotating shaft mechanism provided by the present application includes a base, a rotating shaft assembly, a synchronization assembly, and a torsion assembly. The rotating shaft assembly includes a first connecting shaft, a second connecting shaft, a first connecting rod arm, and a second connecting rod arm. Since the first rotating connection portion of the first connecting rod arm is rotationally connected to the base through the first connecting shaft, and the second rotating connection portion of the second connecting rod arm is rotationally connected to the base through the second connecting shaft, the synchronization assembly is arranged between the first rotating connection portion and the second rotating connection portion and cooperates with the first rotating connection portion and the second rotating connection portion, so that the first connecting rod arm and the second connecting rod arm rotate synchronously relative to the base. The torsion assembly is arranged between the first rotating connection portion and the second rotating connection portion and is arranged axially along the rotating shaft mechanism with the synchronization assembly. The torsion assembly generates a radial extrusion force on the first connecting rod arm and / or the second connecting rod arm during the rotation of the first connecting rod arm and the second connecting rod arm relative to the base. Therefore, the setting of the torsion assembly can increase the damping force during the rotation of the first connecting rod arm and the second connecting rod arm relative to the base, thereby increasing the torsion of the rotating shaft mechanism, which is beneficial to realizing the hover of the rotating shaft mechanism. In addition, since the torsion assembly is arranged between the first rotating connection portion and the second rotating connection portion, the first rotating connection portion is sleeved on the first connecting shaft, and the second rotating connection portion is sleeved on the second connecting shaft, the radial extrusion force generated by the torsion assembly on the first connecting rod arm and / or the second connecting rod arm can squeeze the first rotating connection portion and / or the second rotating connection portion, so that the cooperation between the first rotating connection portion and the first connecting shaft and / or the cooperation between the second rotating connection portion and the second connecting shaft are in a state of being unilaterally squeezed. In this way, it is beneficial to improve the cooperation effect between the first rotating connection portion and / or the second rotating connection portion and the synchronization assembly, thereby improving the rotational synchronization of both sides of the rotating shaft mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below.

[0013] Figure 1 It is a schematic structural diagram of the foldable electronic device provided by the embodiment of the present application when in a flattened state;

[0014] Figure 2 It is a schematic structural diagram of the foldable electronic device provided by the embodiment of the present application when in a combined state;

[0015] Figure 3Schematic diagram of the structure of the foldable electronic device provided by the embodiment of the present application when in a hovering state;

[0016] Figure 4 For Figure 1 Schematic diagram of the structure of the foldable housing in the foldable electronic device shown;

[0017] Figure 5 For Figure 1 Schematic diagram of the structure of the flexible display screen in the foldable electronic device shown;

[0018] Figure 6 For Figure 2 Schematic diagram of the structure of the flexible display screen in the foldable electronic device shown;

[0019] Figure 7 Schematic diagram of a structure of the rotating shaft mechanism provided by the embodiment of the present application;

[0020] Figure 8 For Figure 7 Partial exploded view of the rotating shaft mechanism shown;

[0021] Figure 9 Schematic diagram of another structure of the rotating shaft mechanism provided by the embodiment of the present application;

[0022] Figure 10 For Figure 9 Partial exploded view of the rotating shaft mechanism shown;

[0023] Figure 11 For Figure 7 Schematic diagram of the structure of the torsion component of the rotating shaft mechanism shown including the first sub-elastic member and the second sub-elastic member;

[0024] Figure 12 For Figure 11 Schematic diagram of a cross-sectional view of the rotating shaft mechanism shown;

[0025] Figure 13 For Figure 11 Schematic diagram of a structure of the rotating shaft component in the rotating shaft mechanism shown;

[0026] Figure 14 For Figure 11 Schematic diagram of another cross-sectional view of the rotating shaft mechanism shown;

[0027] Figure 15 For Figure 11 Schematic diagram of another structure of the rotating shaft component in the rotating shaft mechanism shown;

[0028] Figure 16 For Figure 9 Schematic diagram of the structure of the torsion component of the rotating shaft mechanism shown including the second elastic member;

[0029] Figure 17 For Figure 16 the structural schematic diagram of the second elastic member in the shown rotating shaft mechanism;

[0030] Figure 18 For Figure 16 the structural schematic diagram of the extrusion member further included in the shown rotating shaft mechanism;

[0031] Figure 19 For Figure 11 the structural schematic diagram of the first rotating arm, the second rotating arm, the first connecting seat and the second connecting seat further included in the shown rotating shaft mechanism;

[0032] Figure 20 For Figure 16 the structural schematic diagram of the first rotating arm, the second rotating arm, the first connecting seat and the second connecting seat further included in the shown rotating shaft mechanism.

[0033] Explanation of reference numerals:

[0034] Foldable electronic device 1000; flexible display screen 200; foldable housing 100; first housing 11; second housing 12; rotating shaft mechanism 10; first non-bending display area 21; bending display area 22; second non-bending display area 23; first sub-bending display area 24; second sub-bending display area 25; third sub-bending display area 26; first connecting shaft 121; second connecting shaft 122; first link arm 123; second link arm 124; first rotating connection part 1231; second rotating connection part 1241; first gear 131; second gear 132; first sub-rotating connection part 123a; second sub-rotating connection part 123b; third sub-rotating connection part 124a; fourth sub-rotating connection part 124b; first sub-elastic member 141; second sub-elastic member 142; first limiting surface 123d; first extrusion surface 123e; second limiting surface 141a; second extrusion surface 141b; third limiting surface 124d; third extrusion surface 124e; fourth limiting surface 142a; fourth extrusion surface 142b; fifth limiting surface 123f; sixth limiting surface 141c; seventh limiting surface 124f; eighth limiting surface 142c; second elastic member 143; first abutting surface 123g; second abutting surface 124g; first abutting part 1431; elastic part 1432; second abutting part 1433; third abutting surface 143a; fourth abutting surface 143b; first fixed connection part 1434; second fixed connection part 1435; first cam part 1232; second cam part 1242; extrusion member 144; third elastic member 145; first rotating arm 125; second rotating arm 126; first connecting seat 127; second connecting seat 128. Detailed implementation manners

[0035] The technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described in the present application are only a part of the embodiments, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments provided in the present application without creative efforts belong to the protection scope of the present application.

[0036] In the present application, the mention of "embodiment" means that the specific features, structures or characteristics described in connection with the embodiment may be included in at least one embodiment of the present application. The phrase appears in various positions in the specification does not necessarily refer to the same embodiment, nor is it an exclusive, independent or alternative embodiment to other embodiments. Those skilled in the art can explicitly and implicitly understand that the embodiments described in the present application can be combined with other embodiments.

[0037] The terms "first", "second", etc. described in the specification and claims of the present application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example: a component or device comprising one or more parts is not limited to the one or more parts listed, but optionally further includes one or more parts not listed but inherent in the product shown, or one or more parts that should be had based on the described function.

[0038] Please refer to Figures 1 to 3 , Figure 1 which is a schematic structural diagram of the foldable electronic device 1000 provided by the embodiment of the present application in the flattened state. Figure 2 which is a schematic structural diagram of the foldable electronic device 1000 provided by the embodiment of the present application in the folded state. Figure 3 which is a schematic structural diagram of the foldable electronic device 1000 provided by the embodiment of the present application in a hovering state. The foldable electronic device 1000 provided by the present application may be a foldable mobile phone, a foldable tablet, a foldable e-book, etc. In the embodiments of the present application, a foldable mobile phone is taken as an example. The foldable electronic device 1000 has a flattened state, a folded state and one or more hovering states. During use, the foldable electronic device 1000 can switch between the flattened state, the folded state and the hovering state. In the hovering state, the foldable electronic device 1000 can maintain a fixed angle and will not automatically unfold or automatically fold.

[0039] The foldable electronic device 1000 includes a flexible display screen 200 and a foldable housing 100. It can be understood that when the foldable electronic device 1000 is in a flattened state, the flexible display screen 200 and the foldable housing 100 are in a flattened state; when the foldable electronic device 1000 is in a folded state, the flexible display screen 200 and the foldable housing 100 are in a folded state; when the foldable electronic device 1000 is in a hovering state, the flexible display screen 200 and the foldable housing 100 are in a hovering state.

[0040] As Figure 4 shown, Figure 4 is Figure 1 a schematic structural diagram of the foldable housing 100 in the foldable electronic device 1000 shown. The foldable housing 100 includes a first housing 11, a second housing 12, and a rotating shaft mechanism 10. The first housing 11 is disposed on one side of the rotating shaft mechanism 10, and the second housing 12 is disposed on the other side of the rotating shaft mechanism 10. In the embodiments of the present application, the first housing 11 and the second housing 12 are disposed on opposite sides of the rotating shaft mechanism 10. The present application does not specifically limit the structures of the first housing 11 and the second housing 12. In a possible embodiment, the first housing 11 may include a rectangular frame, and the second housing 12 may include a rectangular frame. Among them, the first housing 11 and the second housing 12 can move towards each other to fold, or the first housing 11 and the second housing 12 can move away from each other to flatten. Specifically, taking Figure 4 the foldable housing 100 shown as an example, during the process of the foldable housing 100 switching from the flattened state to the folded state, the first housing 11 gradually rotates clockwise, and the second housing 12 gradually rotates counterclockwise; during the process of the foldable housing 100 switching from the folded state to the flattened state, the first housing 11 gradually rotates counterclockwise, and the second housing 12 gradually rotates clockwise.

[0041] It can be understood that when the foldable housing 100 is in the flattened state, the rotating shaft mechanism 10 is in the flattened state; when the foldable housing 100 is in the folded state, the rotating shaft mechanism 10 is in the folded state; when the foldable housing 100 is in the hovering state, the rotating shaft mechanism 10 is in the hovering state. Among them, when the foldable housing 100 is in the flattened state, it can be understood that the angle between the first housing 11 and the second housing 12 is 180° or close to 180°. When the foldable housing 100 is in the folded state, it can be understood that the angle between the first housing 11 and the second housing 12 is 0° or close to 0°. When the foldable housing 100 is in the hovering state, it can be understood that the angle between the first housing 11 and the second housing 12 is at a designed angle between 0° and 180°. For example: if it is designed that the foldable housing 100 can hover between 50° and 130°, then when the angle between the first housing 11 and the second housing 12 is any angle between 50° and 130°, it can be understood that the foldable housing 100 is in the hovering state. At this time, when the angle between the first housing 11 and the second housing 12 is 50°, it can be understood that the foldable housing 100 is in a critical hovering state; when the angle between the first housing 11 and the second housing 12 is 90°, it can be understood that the foldable housing 100 is in the middle hovering state; when the angle between the first housing 11 and the second housing 12 is 130°, it can be understood that the foldable housing 100 is in another critical hovering state. Of course, in other embodiments, the foldable housing 100 can be designed to hover within other angular ranges between 0° and 180°.

[0042] Please refer to Figure 4 and Figure 5 , the flexible display screen 200 includes a first non-bending display area 21, a bending display area 22, and a second non-bending display area 23 arranged in sequence. The first non-bending display area 21 covers the first housing 11. The bending display area 22 covers the rotating shaft mechanism 10. The second non-bending display area 23 covers the second housing 12.

[0043] The flexible display screen 200 can be a flexible Organic Light-Emitting Diode (OLED) display screen. A fixed connection can be established between the first non-bending display area 21 and the first housing 11. A fixed connection can be established between the second non-bending display area 23 and the second housing 12. Optionally, the non-display side of the first non-bending display area 21 is adhered to the first housing 11, and the non-display side of the second non-bending display area 23 is adhered to the second housing 12. When the flexible display screen 200 switches between the flattened state, the folded state, and the hovering state, the first non-bending display area 21 and the second non-bending display area 23 do not bend. There can be no connection or a partial connection between the bending display area 22 and the rotating shaft mechanism 10. The bending display area 22 is flattened when the flexible display screen 200 is in the flattened state, and the bending display area 22 bends when the flexible display screen 200 is in the folded state.

[0044] In a possible embodiment, as Figure 6 shown, when the flexible display screen 200 is in the folded state, it can be in a water droplet shape. Specifically, the bending display area 22 can include a first sub-bending display area 24, a second sub-bending display area 25, and a third sub-bending display area 26 arranged in sequence. The first sub-bending display area 24 is adjacent to the first non-bending display area 21. The third sub-bending display area 26 is adjacent to the second non-bending display area 23. It can be understood that the flexible display screen 200 includes the first non-bending display area 21, the first sub-bending display area 24, the second sub-bending display area 25, the third sub-bending display area 26, and the second non-bending display area 23 arranged in sequence. When the flexible display screen 200 is in the folded state, the first non-bending display area 21 and the second non-bending display area 23 are opposite to each other. The dimension of the line connecting the end of the first sub-bending display area 24 far from the second sub-bending display area 25 and the end of the third sub-bending display area 26 far from the second sub-bending display area 25 is L1, and the dimension of the line connecting the end of the first sub-bending display area 24 close to the second sub-bending display area 25 and the end of the third sub-bending display area 26 close to the second sub-bending display area 25 is L2, and L1 is less than L2. In this embodiment, the first sub-bending display area 24 and the third sub-bending display area 26 of the bending display area 22 can be connected to the rotating shaft mechanism 10 and bent respectively under the action of the rotating shaft mechanism 10. The second sub-bending display area 25 of the bending display area 22 is not connected to the rotating shaft mechanism 10 and bends freely.

[0045] Please refer to Figures 7 to 10 , Figure 7 which is a schematic structural diagram of the rotating shaft mechanism 10 provided by an embodiment of the present application, Figure 8 is Figure 7 a partial exploded view of the rotating shaft mechanism 10 shown in Figure 9 which is another schematic structural diagram of the rotating shaft mechanism 10 provided by an embodiment of the present application,Figure 10 As Figure 9 shown in the partial exploded view of the rotating shaft mechanism 10. The rotating shaft mechanism 10 includes a base 101, a rotating shaft assembly 102, a synchronization assembly 103, and a torsion assembly 104.

[0046] Among them, the base 101 remains stationary when the rotating shaft mechanism 10 switches between the flattened state, the hovering state, and the combined state. The base 101 can be used to carry the rotating shaft assembly 102, the synchronization assembly 103, and the torsion assembly 104.

[0047] The rotating shaft assembly 102 includes a first connecting shaft 121, a second connecting shaft 122, a first link arm 123, and a second link arm 124. When divided by the cross-sectional shape of the shaft, the first connecting shaft 121 and the second connecting shaft 122 can be a circular shaft, a square shaft, a crankshaft, etc. When divided by whether there is material at the axis center, the first connecting shaft 121 and the second connecting shaft 122 can be a solid shaft, a hollow shaft, etc. This application does not specifically limit the materials of the first connecting shaft 121, the second connecting shaft 122, the first link arm 123, and the second link arm 124. For example: the materials of the first connecting shaft 121, the second connecting shaft 122, the first link arm 123, and the second link arm 124 can include one or more of plastic, metal, and alloy.

[0048] The first link arm 123 and the second link arm 124 are provided on opposite sides of the base 101. In other words, the first link arm 123 is located on one side of the base 101, and the second link arm 124 is located on the side of the base 101 opposite to the first link arm 123. In a possible embodiment, the first link arm 123 and the second link arm 124 can be symmetrically arranged about the central axis of the base 101.

[0049] The first link arm 123 includes a first rotating connection portion 1231. The first rotating connection portion 1231 is sleeved on the first connecting shaft 121 and is rotationally connected to the base 101 through the first connecting shaft 121. It can be understood that the first link arm 123 can rotate relative to the base 101, and the rotation center line of the first link arm 123 coincides with the central axis of the first connecting shaft 121. The second link arm 124 includes a second rotating connection portion 1241. The second rotating connection portion 1241 is sleeved on the second connecting shaft 122 and is rotationally connected to the base 101 through the second connecting shaft 122. It can be understood that the second link arm 124 can rotate relative to the base 101, and the rotation center line of the second link arm 124 coincides with the central axis of the second connecting shaft 122. Among them, when the rotating shaft mechanism 10 switches between the flattened state, the hovering state, and the combined state, the rotation direction of the first link arm 123 relative to the base 101 is opposite to the rotation direction of the second link arm 124 relative to the base 101.

[0050] It can be understood that the first connecting shaft 121 is used to form a hinge connection between the first link arm 123 and the base 101; the second connecting shaft 122 is used to form a hinge connection between the second link arm 124 and the base 101. In a possible embodiment, the first connecting shaft 121 can be respectively fitted with the shaft hole of the first link arm 123 and a shaft hole of the base 101 to rotatably connect the first link arm 123 and the base 101; the second connecting shaft 122 can be respectively fitted with the shaft hole of the second connecting rod arm and another shaft hole of the base 101 to rotatably connect the second link arm 124 and the base 101. In other words, the first connecting shaft 121 can be a pin shaft; the second connecting shaft 122 can be a pin shaft. During the rotation of the first link arm 123 relative to the base 101, the first connecting shaft 121 can rotate relative to the base 101 or remain stationary relative to the base 101; during the rotation of the second link arm 124 relative to the base 101, the second connecting shaft 122 can rotate relative to the base 101 or remain stationary relative to the base 101. It can be understood that the first connecting shaft 121 can be relatively fixed to one of the first link arm 123 and the base 101, and the second connecting shaft 122 can be relatively fixed to one of the second link arm 124 and the base 101. The relative fixation described in this application means that there is no relative movement between the two. In the following embodiments, without explicit description, during the rotation of the first link arm 123 relative to the base 101, the first connecting shaft 121 rotates relative to the base 101 along with the first link arm 123, and during the rotation of the second link arm 124 relative to the base 101, the second connecting shaft 122 rotates relative to the base 101 along with the second link arm 124. Among them, the fit between the first rotating connection portion 1231 and the first connecting shaft 121 can be a clearance fit or an interference fit; the fit between the second rotating connection portion 1241 and the second connecting shaft 122 can be a clearance fit or an interference fit.

[0051] The synchronization component 103 is disposed between the first rotating connection portion 1231 and the second rotating connection portion 1241 and cooperates with the first rotating connection portion 1231 and the second rotating connection portion 1241. The synchronization component 103 is used to make the first link arm 123 and the second link arm 124 rotate synchronously relative to the base 101. Among them, the synchronization component 103 can be a gear type synchronization component 103. Specifically, the synchronization component 103 can include one or more meshing gears. The synchronization component 103 is in gear meshing with the first rotating connection portion 1231, and the synchronization component 103 is in gear meshing with the second rotating connection portion 1241. When one of the first link arm 123 and the second link arm 124 rotates relative to the base 101 under the action of an external force, the synchronization component 103 can drive the other of the first link arm 123 and the second link arm 124 to rotate synchronously relative to the base 101.

[0052] In a possible embodiment, the synchronization component 103 includes a first gear 131 and a second gear 132 that mesh with each other. The first gear 131 and the second gear 132 are located between the first rotational connection portion 1231 and the second rotational connection portion 1241. The first gear 131 meshes with the first rotational connection portion 1231. The second gear 132 meshes with the second rotational connection portion 1241.

[0053] The torsion component 104 is disposed between the first rotational connection portion 1231 and the second rotational connection portion 1241 and is arranged axially along the rotation shaft mechanism 10 with the synchronization component 103. Among them, there may be a spaced arrangement between the torsion component 104 and the synchronization component 103. When the rotation shaft mechanism 10 is in a flattened state, the axial direction of the rotation shaft mechanism 10 may refer to the Figure 7 M-axis direction shown in the attached figure. The axial direction of the rotation shaft mechanism 10 is parallel to the central axes of the first connection shaft 121, the second connection shaft 122, and the base 101. The torsion component 104 generates a radial squeezing force on the first link arm 123 and / or the second link arm 124 during the rotation of the first link arm 123 and the second link arm 124 relative to the base 101. Specifically, when the torsion component 104 generates a radial squeezing force on the first link arm 123, that is, the torsion component 104 can squeeze the first link arm 123 toward the side of the first rotational connection portion 1231 away from the second rotational connection portion 1241. When the torsion component 104 generates a radial squeezing force on the second link arm 124, that is, the torsion component 104 can squeeze the second link arm 124 toward the side of the second rotational connection portion 1241 away from the first rotational connection portion 1231. It can be understood that the torsion component 104 can deform in the direction opposite to the relative direction of the first link arm 123 and the second link arm 124.

[0054] Among them, when the torsion component 104 generates a radial squeezing force on the first link arm 123, it can increase the damping force of the first link arm 123 rotating relative to the base 101, and can make the first rotational connection portion 1231 and the first connection shaft 121 in a one-sided pressing state. When the torsion component 104 generates a radial squeezing force on the second link arm 124, it can increase the damping force of the second link arm 124 rotating relative to the base 101, and can make the second rotational connection portion 1241 and the second connection shaft 122 in a one-sided pressing state.

[0055] The rotating shaft mechanism 10 provided by the present application includes a base 101, a rotating shaft assembly 102, a synchronization assembly 103, and a torsion assembly 104. The rotating shaft assembly 102 includes a first connecting shaft 121, a second connecting shaft 122, a first connecting rod arm 123, and a second connecting rod arm 124. Since the first rotating connection portion 1231 of the first connecting rod arm 123 is rotatably connected to the base 101 through the first connecting shaft 121, and the second rotating connection portion 1241 of the second connecting rod arm 124 is rotatably connected to the base 101 through the second connecting shaft 122, the synchronization assembly 103 is disposed between the first rotating connection portion 1231 and the second rotating connection portion 1241 and cooperates with the first rotating connection portion 1231 and the second rotating connection portion 1241 to enable the first connecting rod arm 123 and the second connecting rod arm 124 to rotate synchronously relative to the base 101. The torsion assembly 104 is disposed between the first rotating connection portion 1231 and the second rotating connection portion 1241 and is arranged axially along the rotating shaft mechanism 10 with the synchronization assembly 103. The torsion assembly 104 generates a radial extrusion force on the first connecting rod arm 123 and / or the second connecting rod arm 124 during the rotation of the first connecting rod arm 123 and the second connecting rod arm 124 relative to the base 101. Therefore, the setting of the torsion assembly 104 can increase the damping force during the rotation of the first connecting rod arm 123 and the second connecting rod arm 124 relative to the base 101, thereby increasing the torsion of the rotating shaft mechanism 10 and facilitating the hovering of the rotating shaft mechanism 10. In addition, since the torsion assembly 104 is disposed between the first rotating connection portion 1231 and the second rotating connection portion 1241, the first rotating connection portion 1231 is sleeved on the first connecting shaft 121, and the second rotating connection portion 1241 is sleeved on the second connecting shaft 122, the radial extrusion force generated by the torsion assembly 104 on the first connecting rod arm 123 and / or the second connecting rod arm 124 can squeeze the first rotating connection portion 1231 and / or the second rotating connection portion 1241, so that the cooperation between the first rotating connection portion 1231 and the first connecting shaft 121 and / or the cooperation between the second rotating connection portion 1241 and the second connecting shaft 122 are in a state of being unidirectionally squeezed. This is beneficial to improving the cooperation effect between the first rotating connection portion 1231 and / or the second rotating connection portion 1241 and the synchronization assembly 103, thereby improving the rotational synchronization on both sides of the rotating shaft mechanism 10.

[0056] Such as Figure 11As shown, the first rotational connection part 1231 includes a first sub-rotational connection part 123a and a second sub-rotational connection part 123b which are arranged at intervals. In this application, there is a connection relationship between different "parts" of the first link arm 123. In this embodiment, the first sub-rotational connection part 123a and the second sub-rotational connection part 123b are indirectly connected. A first accommodation space 123c is formed between the first sub-rotational connection part 123a and the second sub-rotational connection part 123b. The second rotational connection part 1241 includes a third sub-rotational connection part 124a and a fourth sub-rotational connection part 124b which are arranged at intervals. In this application, there is a connection relationship between different "parts" of the second link arm 124. In this embodiment, the third sub-rotational connection part 124a and the fourth sub-rotational connection part 124b are indirectly connected. A second accommodation space 124c is formed between the third sub-rotational connection part 124a and the fourth sub-rotational connection part 124b. Among them, the first sub-rotational connection part 123a and the third sub-rotational connection part 124a can be symmetrically arranged with respect to the central axis of the base 101; the second sub-rotational connection part 123b and the fourth sub-rotational connection part 124b can be symmetrically arranged with respect to the central axis of the base 101.

[0057] The synchronization component 103 is arranged between the first sub-rotational connection part 123a and the third sub-rotational connection part 124a. The torsion component 104 is arranged between the second sub-rotational connection part 123b and the fourth sub-rotational connection part 124b. The synchronization component 103 cooperates with the first sub-rotational connection part 123a and the third sub-rotational connection part 124a. It can be understood that both sides of the synchronization component 103 cooperate with the first sub-rotational connection part 123a and the third sub-rotational connection part 124a respectively, so that the first link arm 123 and the second link arm 124 rotate synchronously with respect to the base 101. The torsion component 104 cooperates with the second sub-rotational connection part 123b and / or the fourth sub-rotational connection part 124b. In a possible embodiment, a part of the torsion component 104 can cooperate with the second sub-rotational connection part 123b, and another part of the torsion component 104 can cooperate with the fourth sub-rotational connection part 124b, so that the torsion component 104 generates a radial extrusion force on the first link arm 123 and the second link arm 124 during the rotation of the first link arm 123 and the second link arm 124 with respect to the base 101. In another possible embodiment, both sides of the torsion component 104 can cooperate with the second sub-rotational connection part 123b and the fourth sub-rotational connection part 124b respectively, so as to generate a radial extrusion force on the first link arm 123 and the second link arm 124 during the rotation of the first link arm 123 and the second link arm 124 with respect to the base 101.

[0058] By making the first rotating connection portion 1231 include a first sub-rotating connection portion 123a and a second sub-rotating connection portion 123b that are spaced apart, the second rotating connection portion 1241 include a third sub-rotating connection portion 124a and a fourth sub-rotating connection portion 124b that are spaced apart, the synchronization component 103 is disposed between the first sub-rotating connection portion 123a and the third sub-rotating connection portion 124a and cooperates with the first sub-rotating connection portion 123a and the third sub-rotating connection portion 124a, and the torsion component 104 is disposed between the second sub-rotating connection portion 123b and the fourth sub-rotating connection portion 124b and cooperates with the second sub-rotating connection portion 123b and / or the fourth sub-rotating connection portion 124b. When the torsion component 104 presses the second sub-rotating connection portion 123b and / or the fourth sub-rotating connection portion 124b, the radial extrusion force can be transmitted to the first housing 11 having a connection relationship with the first link arm 123 and / or transmitted to the second housing 12 having a connection relationship with the second link arm 124 through the first link arm 123 to a greater extent, thereby better improving the torsion of the rotating shaft mechanism 10; and the radial extrusion force is transmitted to the first sub-rotating connection portion 123a and / or the third sub-rotating connection portion 124a to a lesser extent, so that when the magnitude of the radial extrusion force changes with the state of the rotating shaft mechanism 10, the influence on the cooperation between the synchronization component 103 and the first sub-rotating connection portion 123a and the influence on the cooperation between the synchronization component 103 and the third sub-rotating connection portion 124a can be reduced.

[0059] In a possible embodiment, as Figure 11 shown, the torsion component 104 includes a first elastic member. The first elastic member includes a first sub-elastic member 141 and / or a second sub-elastic member 142. It can be understood that the first elastic member can include the first sub-elastic member 141; or, the first elastic member can include the second sub-elastic member 142; or, the first elastic member can include the first sub-elastic member 141 and the second sub-elastic member 142. In the following description of the embodiments, the case where the first elastic member includes the first sub-elastic member 141 and the second sub-elastic member 142 is taken as an example.

[0060] Among them, the first sub-elastic member 141 abuts between the second sub-rotating connection portion 123b and the base 101. The second sub-elastic member 142 abuts between the fourth sub-rotating connection portion 124b and the base 101. Among them, one side of the first sub-elastic member 141 contacts the second sub-rotating connection portion 123b, and the other side of the first sub-elastic member 141 contacts the base 101. The first sub-elastic member 141 can squeeze the first link arm 123 toward the side away from the base 101 of the first link arm 123 to generate a radial squeezing force on the first link arm 123. One side of the second sub-elastic member 142 contacts the fourth sub-rotating connection portion 124b, and the other side of the second sub-elastic member 142 contacts the base 101. The second sub-elastic member 142 can squeeze the second link arm 124 toward the side away from the base 101 of the second link arm 124 to generate a radial squeezing force on the second link arm 124. Among them, the elastic member refers to a structural member that can undergo a certain deformation after being stressed. For example: the first sub-elastic member 141 can be a spring-type elastic member, a block-shaped elastic member, etc.; the second sub-elastic member 142 can be a spring-type elastic member, a block-shaped elastic member, etc. In the embodiment of the present application, the first sub-elastic member 141 and the second sub-elastic member 142 are taken as an example of a block-shaped elastic member substantially in an "L" shape.

[0061] This embodiment can realize the cooperation between a part of the torsion assembly 104 and the second sub-rotating connection portion 123b, and the cooperation between another part of the torsion assembly 104 and the fourth sub-rotating connection portion 124b, thereby increasing the torsion of the rotating shaft mechanism 10 and improving the synchronization of the rotation on both sides of the rotating shaft mechanism 10. In addition, the space occupied by the first sub-elastic member 141 and the second sub-elastic member 142 in this embodiment is small, and the fixing method between the first sub-elastic member 141 and the second sub-elastic member 142 and the base 101 is also simple and easy to implement. The cooperation between the first sub-elastic member 141 and the second sub-rotating connection portion 123b and the cooperation between the second sub-elastic member 142 and the fourth sub-rotating connection portion 124b are closer and more stable.

[0062] Please refer to Figure 12 and Figure 13, the second sub-rotating connection portion 123b includes a first limiting surface 123d and a first pressing surface 123e. The first limiting surface 123d is adjacent to the first pressing surface 123e. The first limiting surface 123d can be an arc-shaped surface. The first pressing surface 123e can be a flat surface or an arc-shaped surface. The first sub-elastic member 141 includes a second limiting surface 141a and a second pressing surface 141b. The second limiting surface 141a can be an arc-shaped surface. The second pressing surface 141b can be a flat surface or an arc-shaped surface. The first limiting surface 123d protrudes relative to the first pressing surface 123e, and the second limiting surface 141a is recessed relative to the second pressing surface 141b, or the first limiting surface 123d is recessed relative to the first pressing surface 123e, and the second limiting surface 141a protrudes relative to the second pressing surface 141b. In other words, the first limiting surface 123d forms a protrusion, and the second limiting surface 141a forms a groove, or the first limiting surface 123d forms a groove, and the second limiting surface 141a forms a protrusion. The first limiting surface 123d and the second limiting surface 141a can be in concave-convex fit.

[0063] When the rotating shaft mechanism 10 is in the first hovering state, the first limiting surface 123d cooperates with the second limiting surface 141a. When the rotating shaft mechanism 10 is in the second hovering state, the first pressing surface 123e abuts against the second pressing surface 141b. In this embodiment, the stability effect of the rotating shaft mechanism 10 in the first hovering state is better than that in the second hovering state. In a possible application scenario, the first hovering state can be designed as the critical hovering state of the rotating shaft mechanism 10. That is, if it is required to design that the rotating shaft mechanism 10 can achieve hovering between 50° and 130°, then 50° and 130° are the two critical hovering states of the rotating shaft mechanism 10.

[0064] Among them, the first sub-elastic member 141 is fixedly connected to the base 101. The fixed connection method between the first sub-elastic member 141 and the base 101 can be a detachable connection or a non-detachable connection. When the first sub-elastic member 141 and the base 101 are detachably connected, the first sub-elastic member 141 and the base 101 can be integrally formed; or, the first sub-elastic member 141 and the base 101 can be welded together; or, the first sub-elastic member 141 and the base 101 can be adhesively bonded together. When the first sub-elastic member 141 and the base 101 are non-detachably connected, the connection method between the first sub-elastic member 141 and the base 101 includes but is not limited to screw connection, snap connection, etc.

[0065] In this embodiment, the second sub-rotating connection portion 123b and the first sub-elastic member 141 are in surface-to-surface abutting fit, and the first sub-elastic member 141 is relatively fixed to the base 101. In this way, the tightness of the fit between the first sub-elastic member 141 and the second sub-rotating connection portion 123b can be improved, and the stability of the first sub-elastic member 141 during the state switching process of the rotating shaft mechanism 10 can be improved, so that the reliability of the first sub-elastic member 141 to generate a radial extrusion force on the first link arm 123 can be improved.

[0066] Further, please refer to Figure 14 and Figure 15 , the fourth sub-rotating connection portion 124b includes a third limiting surface 124d and a third pressing surface 124e. The third limiting surface 124d and the third pressing surface 124e are adjacent to each other. The third limiting surface 124d can be an arc-shaped surface. The third pressing surface 124e can be a flat surface or an arc-shaped surface. The second sub-elastic member 142 includes a fourth limiting surface 142a and a fourth pressing surface 142b. The fourth limiting surface 142a can be an arc-shaped surface. The fourth pressing surface 142b can be a flat surface or an arc-shaped surface. The third limiting surface 124d protrudes relative to the third pressing surface 124e, and the fourth limiting surface 142a is recessed relative to the fourth pressing surface 142b, or the third limiting surface 124d is recessed relative to the third pressing surface 124e, and the fourth limiting surface 142a protrudes relative to the fourth pressing surface 142b. In other words, the third limiting surface 124d forms a protrusion, and the fourth limiting surface 142a forms a groove, or the third limiting surface 124d forms a groove, and the fourth limiting surface 142a forms a protrusion. The third limiting surface 124d and the fourth limiting surface 142a can be in concave-convex fit.

[0067] When the rotating shaft mechanism 10 is in the third hovering state, the third limiting surface 124d cooperates with the fourth limiting surface 142a. When the rotating shaft mechanism 10 is in the second hovering state, the third pressing surface 124e abuts against the fourth pressing surface 142b. In this embodiment, the stability effect of the rotating shaft mechanism 10 in the third hovering state is better than that in the second hovering state. In a possible application scenario, the third hovering state can be designed as the critical hovering state of the rotating shaft mechanism 10.

[0068] Among them, the third hovering state and the first hovering state can be the same critical hovering state or different critical hovering states. When the third hovering state and the first hovering state are the same critical hovering state, the first limiting surface 123d and the second limiting surface 141a cooperate with each other in this critical hovering state, and the third limiting surface 124d and the fourth limiting surface 142a cooperate with each other. In other words, taking the above application scenario as an example, one of the third hovering state and the first hovering state can correspondingly achieve the hovering of the rotating shaft mechanism 10 at 50°, and the other of the third hovering state and the first hovering state can correspondingly achieve the hovering of the rotating shaft mechanism 10 at 130°; or, both the third hovering state and the first hovering state correspondingly achieve the hovering of the rotating shaft mechanism 10 at 50°; or, both the third hovering state and the first hovering state correspondingly achieve the hovering of the rotating shaft mechanism 10 at 130°. In the following embodiments, the case where the third hovering state and the first hovering state are different critical hovering states is taken as an example.

[0069] The second sub-elastic member 142 is fixedly connected to the base 101. The fixed connection manner between the second sub-elastic member 142 and the base 101 can be a detachable connection or a non-detachable connection. When the connection between the second sub-elastic member 142 and the base 101 is detachable, the second sub-elastic member 142 and the base 101 can be integrally formed; or, the second sub-elastic member 142 and the base 101 can be welded together; or, the second sub-elastic member 142 and the base 101 can be adhesively bonded together. When the connection between the second sub-elastic member 142 and the base 101 is non-detachable, the connection manner between the second sub-elastic member 142 and the base 101 includes but is not limited to threaded connection, snap connection, etc. The fixed connection manner between the second sub-elastic member 142 and the base 101 and the fixed connection manner between the first sub-elastic member 141 and the base 101 can be the same or different.

[0070] In this embodiment, the fourth sub-rotating connection portion 124b and the second sub-elastic member 142 are in surface-to-surface abutting cooperation, and the second sub-elastic member 142 and the base 101 are relatively fixed. In this way, the tightness of the cooperation between the second sub-elastic member 142 and the fourth sub-rotating connection portion 124b can be improved, and the stability of the second sub-elastic member 142 during the state switching process of the rotating shaft mechanism 10 can be improved, so that the reliability of the second sub-elastic member 142 to generate a radial extrusion force on the second link arm 124 can be improved.

[0071] Please refer to Figure 14 and Figure 15, the second sub-rotating connection portion 123b further includes a fifth limiting surface 123f. The fifth limiting surface 123f may be an arc-shaped surface. The first limiting surface 123d, the first pressing surface 123e, and the fifth limiting surface 123f are arranged in sequence. The first sub-elastic member 141 further includes a sixth limiting surface 141c. The sixth limiting surface 141c may be an arc-shaped surface. The fifth limiting surface 123f protrudes relative to the first pressing surface 123e, and the sixth limiting surface 141c is recessed relative to the second pressing surface 141b, or the fifth limiting surface 123f is recessed relative to the first pressing surface 123e, and the sixth limiting surface 141c protrudes relative to the second pressing surface 141b. In other words, the fifth limiting surface 123f forms a protrusion, and the sixth limiting surface 141c forms a groove, or the fifth limiting surface 123f forms a groove, and the sixth limiting surface 141c forms a protrusion. The fifth limiting surface 123f and the sixth limiting surface 141c can be in concave-convex fit. When the rotating shaft mechanism 10 is in the third hovering state, the sixth limiting surface 141c cooperates with the fifth limiting surface 123f.

[0072] Please refer to Figure 12 and Figure 13 , the fourth sub-rotating connection portion 124b further includes a seventh limiting surface 124f. The seventh limiting surface 124f may be an arc-shaped surface. The third limiting surface 124d, the third pressing surface 124e, and the seventh limiting surface 124f are arranged in sequence. The second sub-elastic member 142 further includes an eighth limiting surface 142c. The eighth limiting surface 142c may be an arc-shaped surface. The seventh limiting surface 124f protrudes relative to the third pressing surface 124e, and the eighth limiting surface 142c is recessed relative to the fourth pressing surface 142b, or the seventh limiting surface 124f is recessed relative to the third pressing surface 124e. In other words, the seventh limiting surface 124f forms a protrusion, and the eighth limiting surface 142c forms a groove, or the seventh limiting surface 124f forms a groove, and the eighth limiting surface 142c forms a protrusion. The seventh limiting surface 124f and the eighth limiting surface 142c can be in concave-convex fit. The eighth limiting surface 142c protrudes relative to the fourth pressing surface 142b. When the rotating shaft mechanism 10 is in the first hovering state, the eighth limiting surface 142c cooperates with the seventh limiting surface 124f.

[0073] In this embodiment, when the rotating shaft mechanism 10 is in the first hovering state, the first limiting surface 123d cooperates with the second limiting surface 141a, and the seventh limiting surface 124f cooperates with the eighth limiting surface 142c; when the rotating shaft mechanism 10 is in the third hovering state, the third limiting surface 124d cooperates with the fourth limiting surface 142a, and the fifth limiting surface 123f cooperates with the sixth limiting surface 141c. In this way, the stability of the rotating shaft mechanism 10 in the two critical hovering states can be improved, and when in the hovering state between the two critical hovering states, the rotating shaft mechanism 10 also has a large rotational damping force.

[0074] In another possible embodiment, as Figure 16 shown, the torsion assembly 104 includes a second elastic member 143. The second elastic member 143 can be a spring-type elastic member, a bellows-shaped elastic member, etc. In the embodiment of the present application, the second elastic member 143 takes the spring-type elastic member as an example. The second elastic member 143 abuts between the second sub-rotating connection portion 123b and the fourth sub-rotating connection portion 124b. It can be understood that one side of the second elastic member 143 contacts the second sub-rotating connection portion 123b, and the other side of the second elastic member 143 contacts the fourth sub-rotating connection portion 124b. The second elastic member 143 can squeeze the first link arm 123 toward the side away from the base 101 to generate a radial squeezing force on the first link arm 123, and can squeeze the second link arm 124 toward the side away from the base 101 to generate a radial squeezing force on the second link arm 124.

[0075] This embodiment can realize the cooperation of both sides of the torsion assembly 104 with the second sub-rotating connection portion 123b and the fourth sub-rotating connection portion 124b respectively, so as to increase the torsion of the rotating shaft mechanism 10 and improve the synchronization of the rotation on both sides of the rotating shaft mechanism 10. In addition, the second elastic member 143 in this embodiment is prone to deformation and has a large deformation amount, so that the effect of increasing the torsion of the rotating shaft mechanism 10 and improving the synchronization of the rotation on both sides of the rotating shaft mechanism 10 can be improved.

[0076] Please refer to Figure 16 and Figure 17, the second sub-rotating connection portion 123b includes a first abutting surface 123g facing the second link arm 124. The first abutting surface 123g can be a flat surface, an inclined surface, a curved surface, etc. The fourth sub-rotating connection portion 124b includes a second abutting surface 124g facing the first link arm 123. The second abutting surface 124g can be a flat surface, an inclined surface, a curved surface, etc. The second elastic member 143 includes a first abutting portion 1431, an elastic portion 1432, and a second abutting portion 1433 arranged in sequence. There is a connection relationship between different "portions" of the second elastic member 143 of the present application. The elastic portion 1432 includes a spring. The elastic portion 1432 deforms along the connection direction of the second sub-rotating connection portion 123b and the fourth sub-rotating connection portion 124b. The first abutting portion 1431 and the second abutting portion 1433 are substantially block-shaped. The first abutting portion 1431 includes a third abutting surface 143a facing the first link arm 123. The third abutting surface 143a is an inclined surface. Specifically, the third abutting surface 143a is inclined with respect to the deformation direction of the elastic portion 1432. It can be understood that the thickness of the first abutting portion 1431 changes uniformly. The second abutting portion 1433 includes a fourth abutting surface 143b facing the second link arm 124. The fourth abutting surface 143b is an inclined surface. Specifically, the fourth abutting surface 143b is inclined with respect to the deformation direction of the elastic portion 1432. It can be understood that the thickness of the first abutting portion 1431 changes uniformly. The first abutting surface 123g is in contact with the third abutting surface 143a. The second abutting surface 124g is in contact with the fourth abutting surface 143b.

[0077] In this embodiment, by making the second elastic member 143 include the first abutting portion 1431, the elastic portion 1432, and the second abutting portion 1433 arranged in sequence, the surface-to-surface cooperation between the second sub-rotating connection portion 123b and the second elastic member 143, and the surface-to-surface cooperation between the fourth sub-rotating connection portion 124b and the second elastic member 143 are realized, which can improve the tightness of the cooperation between the second elastic member 143 and the first link arm 123 and the second link arm 124, thereby being beneficial to improving the reliability of the second elastic member 143 to generate a radial squeezing force on the first link arm 123 and the second link arm 124. In addition, by making the third abutting surface 143a and the fourth abutting surface be inclined surfaces, it is beneficial to make the radial squeezing force generated by the second elastic member 143 on the first link arm 123 and the second link arm 124 change with the state of the rotating shaft mechanism 10, that is, different radial squeezing forces can be generated in different folding states, and the hovering angle and torque value of the rotating shaft mechanism 10 can be adjusted.

[0078] During the process of the rotating shaft mechanism 10 rotating from the flattened state to the combined state, the radial extrusion force generated by the second elastic member 143 on the second sub-rotating connection portion 123b and the fourth sub-rotating connection portion 124b gradually increases. Specifically, when the rotating shaft mechanism 10 is in the flattened state, the first abutting surface 123g is in contact with the first region of the third abutting surface 143a, and the second abutting surface 124g is in contact with the second region of the fourth abutting surface 143b. When the rotating shaft mechanism 10 is in the combined state, the first abutting surface 123g is in contact with the third region of the third abutting surface 143a, and the second abutting surface 124g is in contact with the fourth region of the fourth abutting surface 143b. Among them, the first region of the third abutting surface 143a is closer to the elastic portion 1432 than the third region, the third region is closer to the second sub-rotating connection portion 123b than the first region, the second region of the fourth abutting surface 143b is closer to the elastic portion 1432 than the fourth region, and the fourth region is closer to the fourth sub-rotating connection portion 124b than the second region. When the rotating shaft mechanism 10 is in the hovering state, the first abutting surface 123g is in contact with the region between the first region and the third region of the third abutting surface 143a, and the second abutting surface 124g is in contact with the region between the second region and the fourth region of the fourth abutting surface 143b.

[0079] Among them, when the rotating shaft mechanism 10 is in the flattened state, the second elastic member 143 is in a compressed state. In this way, the second elastic member 143 can provide a certain pre-pressure to ensure that the mating surfaces in the radial fit of the rotating shaft mechanism 10 can be closely attached.

[0080] Please refer to Figure 16 and Figure 17 As shown in, the second elastic member 143 further includes a first fixed connection portion 1434 and a second fixed connection portion 1435. The first fixed connection portion 1434 is located between the first sub-rotating connection portion 123a and the second sub-rotating connection portion 123b. It can be understood that the first fixed connection portion 1434 is located in the first receiving space 123c. The first fixed connection portion 1434 is sleeved on the first connecting shaft 121. The second fixed connection portion 1435 is located between the third sub-rotating connection portion 124a and the fourth sub-rotating connection portion 124b. It can be understood that the second fixed connection portion 1435 is located in the second receiving space 124c. The second fixed connection portion 1435 is sleeved on the second connecting shaft 122. Among them, the fit between the first fixed connection portion 1434 and the first connecting shaft 121 can be one of clearance fit, transition fit, and interference fit. The fit between the second fixed connection portion 1435 and the second connecting shaft 122 can be one of clearance fit, transition fit, and interference fit.

[0081] By making the second elastic member 143 further include a first fixed connection portion 1434 and a second fixed connection portion 1435, with the first fixed connection portion 1434 sleeved on the first connection shaft 121 and the second fixed connection portion 1435 sleeved on the second connection shaft 122, the fixation of the second elastic member 143 relative to the base 101 can be achieved, avoiding the deviation of the second elastic member 143 relative to the second sub-rotating connection portion 123b and the fourth sub-rotating connection portion 124b during the rotation of the first link arm 123 and the second link arm 124 relative to the base 101.

[0082] As Figure 18 shown, the first link arm 123 further includes a first cam portion 1232. The first cam portion 1232 can be disposed on one side of the first sub-rotating connection portion 123a facing away from the second sub-rotating connection portion 123b and / or on one side of the second sub-rotating connection portion 123b facing away from the first sub-rotating connection portion 123a. The second link arm 124 further includes a second cam portion 1242. The second cam portion 1242 can be disposed on one side of the third sub-rotating connection portion 124a facing away from the fourth sub-rotating connection portion 124b and / or on one side of the fourth sub-rotating connection portion 124b facing away from the third sub-rotating connection portion 124a. The torsion assembly 104 further includes a pressing member 144 and a third elastic member 145. The pressing member 144 includes a third cam portion and a fourth cam portion. The third cam portion cooperates with the first cam portion 1232. The fourth cam portion cooperates with the second cam portion 1242. Among them, the third cam portion can be sleeved on the first connection shaft 121; the fourth cam portion can be sleeved on the second connection shaft 122. The cooperation between the third cam portion and the first cam portion 1232 is the cooperation of a spiral surface and a spiral surface. The cooperation between the fourth cam portion and the second cam portion 1242 is the cooperation of a spiral surface and a spiral surface. The third elastic member 145 can include a spring, a bellows, etc. In the embodiment of the present application, the third elastic member 145 is taken as an example of including two springs. One spring is sleeved on the first connection shaft 121, and both ends can be fixedly connected to one side of the third cam portion facing away from the first link arm 123 and the base 101 respectively. The other spring is sleeved on the second connection shaft 122, and both ends can be fixedly connected to one side of the fourth cam portion facing away from the second link arm 124 and the base 101 respectively. The pressing member 144 moves axially along the rotating shaft mechanism 10 under the action of the first link arm 123 and the second link arm 124 during the change of the state of the rotating shaft mechanism 10. The pressing member 144 can compress the third elastic member 145 during the rotation of the first link arm 123 and the second link arm 124 relative to the base 101 so that the third elastic member 145 is compressed. The elastic force generated by the compression of the third elastic member 145 can be converted into the torsion of the rotating shaft mechanism 10, which is beneficial to realizing the hover of the rotating shaft mechanism 10.

[0083] Please refer to Figure 19 and Figure 20, the rotating shaft assembly 102 further includes a first rotating arm 125, a second rotating arm 126, a first connecting seat 127 and a second connecting seat 128. The first rotating arm 125, the first connecting seat 127 and the first link arm 123 are disposed on the same side of the base 101. The first link arm 123 further includes a first sliding connection portion. The first sliding connection portion is connected to the first sub-rotating connection portion 123a and the second sub-rotating connection portion 123b. The first sliding connection portion is slidably connected to the first connecting seat 127. The first rotating arm 125 is rotatably connected to the base 101 and rotatably connected to the first connecting seat 127. The second rotating arm 126, the second connecting seat 128 and the second link arm 124 are disposed on the same side of the base 101. The second link arm 124 further includes a second sliding connection portion. The second sliding connection portion is connected to the third sub-rotating connection portion 124a and the fourth sub-rotating connection portion 124b. The second sliding connection portion is slidably connected to the second connecting seat 128. The second rotating arm 126 is rotatably connected to the base 101 and rotatably connected to the second connecting seat 128.

[0084] Wherein, the first link arm 123 and the first connecting seat 127 can be slidably connected through the cooperation of a slider and a chute. The first rotating arm 125 and the base 101 can be rotatably connected through the cooperation of a rotating shaft and a shaft hole, or the first rotating arm 125 and the base 101 can be rotatably connected through the cooperation of an arc block and an arc groove. The first rotating arm 125 and the first connecting seat 127 can be rotatably connected through the cooperation of a rotating shaft and a shaft hole, or the first rotating arm 125 and the second connecting seat 128 can be rotatably connected through the cooperation of an arc block and an arc groove. The second link arm 124 and the second connecting seat 128 can be slidably connected through the cooperation of a slider and a chute. The second rotating arm 126 and the base 101 can be rotatably connected through the cooperation of a rotating shaft and a shaft hole, or the second rotating arm 126 and the base 101 can be rotatably connected through the cooperation of an arc block and an arc groove. The second rotating arm 126 and the second connecting seat 128 can be rotatably connected through the cooperation of a rotating shaft and a shaft hole, or the second rotating arm 126 and the second connecting seat 128 can be rotatably connected through the cooperation of an arc block and an arc groove.

[0085] The first rotating arm 125 and the second rotating arm 126 can be symmetrical about the central axis of the base 101. The first connecting seat 127 and the second connecting seat 128 can be symmetrical about the central axis of the base 101. The first connecting seat 127 is fixedly connected to the first housing 11. The second connecting seat 128 is fixedly connected to the second housing 12. The first connecting seat 127 can be disposed inside the first housing 11 and fixedly connected to the first housing 11. The second connecting seat 128 can be disposed inside the second housing 12 and fixedly connected to the second housing 12. It can be understood that the first rotating arm 125 and the first link arm 123 are connected to the first housing 11 through the first connecting seat 127. The second rotating arm 126 and the second link arm 124 are connected to the second housing 12 through the second connecting seat 128.

[0086] In this embodiment, the first link arm 123, the first rotating arm 125, and the first connecting seat 127 of the rotating shaft assembly 102 and the base 101 can form a crank-slider mechanism. The second link arm 124, the second rotating arm 126, and the second connecting seat 128 of the rotating shaft assembly 102 and the base 101 can form another crank-slider mechanism, such that the distance between the first connecting seat 127 and the base 101 can vary with the bending angle of the rotating shaft mechanism 10, and the distance between the second connecting seat 128 and the base 101 can vary with the bending angle of the rotating shaft mechanism 10. Thus, when the flexible display screen 200 is in the folded state, it can be in a water droplet shape, and at the same time, the length change of the foldable housing 100 can adapt to the length change of the flexible display screen 200, avoiding stretching or squeezing the flexible display screen 200 during the bending process of the foldable housing 100.

[0087] The features mentioned in the above description, claims, and drawings, as long as they are meaningful within the scope of this application, can be combined with each other arbitrarily. The advantages and features described for the rotating shaft mechanism 10 are applicable to the foldable housing 100 and the foldable electronic device 1000 in a corresponding manner.

[0088] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application, and these improvements and refinements are also regarded as within the protection scope of the present application.

Claims

1. A rotating shaft mechanism, characterized in that, Comprising: Base; A rotating shaft assembly, including a first connecting shaft, a second connecting shaft, a first connecting rod arm and a second connecting rod arm. The first connecting rod arm and the second connecting rod arm are arranged on opposite sides of the base. The first connecting rod arm includes a first rotating connection portion, and the first rotating connection portion is sleeved on the first connecting shaft and rotatably connected to the base through the first connecting shaft. The second connecting rod arm includes a second rotating connection portion, and the second rotating connection portion is sleeved on the second connecting shaft and rotatably connected to the base through the second connecting shaft; A synchronization assembly, arranged between the first rotating connection portion and the second rotating connection portion and cooperating with the first rotating connection portion and the second rotating connection portion. The synchronization assembly is used to make the first connecting rod arm and the second connecting rod arm rotate synchronously relative to the base; And A torsion assembly, arranged between the first rotating connection portion and the second rotating connection portion and arranged axially along the rotating shaft mechanism with the synchronization assembly. The torsion assembly generates a radial squeezing force on the first connecting rod arm and / or the second connecting rod arm during the rotation of the first connecting rod arm and the second connecting rod arm relative to the base.

2. The rotating shaft mechanism according to claim 1, characterized in that, The first rotating connection portion includes a first sub-rotating connection portion and a second sub-rotating connection portion arranged at intervals. The second rotating connection portion includes a third sub-rotating connection portion and a fourth sub-rotating connection portion arranged at intervals. The synchronization assembly is arranged between the first sub-rotating connection portion and the third sub-rotating connection portion and cooperates with the first sub-rotating connection portion and the third sub-rotating connection portion. The torsion assembly is arranged between the second sub-rotating connection portion and the fourth sub-rotating connection portion and cooperates with the second sub-rotating connection portion and / or the fourth sub-rotating connection portion.

3. The shaft mechanism according to claim 2, wherein, The torsion assembly includes a first elastic member or a second elastic member; the first elastic member includes a first sub-elastic member and / or a second sub-elastic member; the first sub-elastic member abuts between the second sub-rotating connection portion and the base, and the second sub-elastic member abuts between the fourth sub-rotating connection portion and the base; the second elastic member abuts between the second sub-rotating connection portion and the fourth sub-rotating connection portion.

4. The shaft mechanism according to claim 3, characterized in that, The second sub-rotating connection portion includes a first limiting surface and a first pressing surface. The first sub-elastic member is fixedly connected to the base. The first sub-elastic member includes a second limiting surface and a second pressing surface. The first limiting surface protrudes relative to the first pressing surface, and the second limiting surface is recessed relative to the second pressing surface, or the first limiting surface is recessed relative to the first pressing surface, and the second limiting surface protrudes relative to the second pressing surface. When the rotating shaft mechanism is in the first hovering state, the first limiting surface cooperates with the second limiting surface. When the rotating shaft mechanism is in the second hovering state, the first pressing surface abuts against the second pressing surface; The fourth sub-rotating connection portion includes a third limiting surface and a third pressing surface. The second sub-elastic member is fixedly connected to the base. The second sub-elastic member includes a fourth limiting surface and a fourth pressing surface. The third limiting surface protrudes relative to the third pressing surface, and the fourth limiting surface is recessed relative to the fourth pressing surface. Or, the third limiting surface is recessed relative to the third pressing surface, and the fourth limiting surface protrudes relative to the fourth pressing surface. When the rotating shaft mechanism is in the third hovering state, the third limiting surface cooperates with the fourth limiting surface. When the rotating shaft mechanism is in the second hovering state, the third pressing surface abuts against the fourth pressing surface.

5. The rotating shaft mechanism according to claim 4, wherein The second sub-rotating connection portion further includes a fifth limiting surface. The first limiting surface, the first pressing surface, and the fifth limiting surface are arranged in sequence. The first sub-elastic member further includes a sixth limiting surface. The fifth limiting surface protrudes relative to the first pressing surface, and the sixth limiting surface is recessed relative to the second pressing surface. Or, the fifth limiting surface is recessed relative to the first pressing surface, and the sixth limiting surface protrudes relative to the second pressing surface. When the rotating shaft mechanism is in the third hovering state, the sixth limiting surface cooperates with the fifth limiting surface. The fourth sub-rotating connection portion further includes a seventh limiting surface. The third limiting surface, the third pressing surface, and the seventh limiting surface are arranged in sequence. The second sub-elastic member further includes an eighth limiting surface. The seventh limiting surface protrudes relative to the third pressing surface, and the eighth limiting surface is recessed relative to the fourth pressing surface. Or, the seventh limiting surface is recessed relative to the third pressing surface, and the eighth limiting surface protrudes relative to the fourth pressing surface. When the rotating shaft mechanism is in the first hovering state, the eighth limiting surface cooperates with the seventh limiting surface.

6. The shaft mechanism according to claim 3, characterized in that, The second sub-rotating connection portion includes a first abutting surface facing the second link arm. The fourth sub-rotating connection portion includes a second abutting surface facing the first link arm. The second elastic member includes a first abutting portion, an elastic portion, and a second abutting portion arranged in sequence. The first abutting portion includes a third abutting surface facing the first link arm. The second abutting portion includes a fourth abutting surface facing the second link arm. The first abutting surface contacts the third abutting surface, and the second abutting surface contacts the fourth abutting surface. Wherein, the third abutting surface and the fourth abutting surface are inclined surfaces.

7. The shaft mechanism according to claim 6, wherein The second elastic member further includes a first fixed connection portion and a second fixed connection portion. The first fixed connection portion is located between the first sub-rotating connection portion and the second sub-rotating connection portion. The first fixed connection portion is sleeved on the first connecting shaft. The second fixed connection portion is located between the third sub-rotating connection portion and the fourth sub-rotating connection portion. The second fixed connection portion is sleeved on the second connecting shaft. During the process of the rotating shaft mechanism rotating from the unfolded state to the folded state, the radial pressing force generated by the second elastic member on the first link arm and the second link arm gradually increases.

8. The rotating shaft mechanism according to any one of claims 1 to 7, characterized in that The first link arm further includes a first cam portion, the second link arm further includes a second cam portion, the torsion assembly further includes a pressing member and a third elastic member. The pressing member includes a third cam portion and a fourth cam portion. The third cam portion cooperates with the first cam portion, and the fourth cam portion cooperates with the second cam portion. During the rotation of the first link arm and the second link arm relative to the base, the pressing member can press the third elastic member to compress the third elastic member. The rotating shaft assembly further includes a first rotating arm, a second rotating arm, a first connecting seat, and a second connecting seat. The first rotating arm, the first connecting seat, and the first link arm are disposed on the same side of the base. The first link arm further includes a first sliding connection portion, and the first sliding connection portion is slidably connected to the first connecting seat. The first rotating arm is rotatably connected to the base and rotatably connected to the first connecting seat. The second rotating arm, the second connecting seat, and the second link arm are disposed on the same side of the base. The second link arm further includes a second sliding connection portion, and the second sliding connection portion is slidably connected to the second connecting seat. The second rotating arm is rotatably connected to the base and rotatably connected to the second connecting seat.

9. A foldable housing, characterized in that, It includes a first housing, a second housing, and the rotating shaft mechanism according to any one of claims 1 to 8. The first housing is disposed on one side of the rotating shaft mechanism, and the second housing is disposed on the other side of the rotating shaft mechanism. The first housing and the second housing can move towards each other to fold, or the first housing and the second housing can move away from each other to unfold.

10. A foldable electronic device, characterized in that, It includes a flexible display screen and the foldable housing according to claim 9. The flexible display screen includes a first non-bending display area, a bending display area, and a second non-bending display area arranged in sequence. The first non-bending display area covers the first housing, the bending display area covers the rotating shaft mechanism, and the second non-bending display area covers the second housing.

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