Hinge and foldable equipment

Abstract

The invention provides a hinge and foldable equipment, relates to the technical field of electronic equipment, and aims to solve the problems that the hinge is complex in structure and poor in stability. The hinge comprises a main shaft, a first folding assembly and a second folding assembly, the first folding assembly and the second folding assembly are symmetrically arranged on the two sides of the main shaft, and the first folding assembly and the second folding assembly can rotate relative to the main shaft; the first folding assembly can comprise a first rotating part and a first nesting shaft; the first nesting shaft is rotationally connected with the main shaft through an arc-shaped surface, the first rotating part is rotationally connected with the first nesting shaft through an arc-shaped surface, and the rotating axis of the first rotating part coincides with the rotating axis of the first nesting shaft, so that the rotating connection between the first rotating part and the main shaft can be realized. The hinge has the advantage of being simple in structure, the contact area between kinematic pairs can be effectively increased through the arc-shaped faces of the first nesting shaft and the second nesting shaft, and good stability is achieved.

Description

Technical Field

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

[0002] A foldable device usually includes two separate shells, which can be connected by a hinge to achieve the foldable function. When a user needs to carry a foldable device with him, he can fold it to reduce its area, thereby improving portability. When a user is using a foldable device, he can unfold it to provide a larger display area and operation area, thereby improving convenience.

[0003] In current foldable devices, the hinges have many components, which increases the difficulty of manufacturing and assembly, significantly increases the manufacturing cost of foldable devices, and is not conducive to ensuring the reliability of the hinges. In addition, when folding or unfolding a foldable device, the contact surface between the kinematic pairs is small, which is not conducive to ensuring the stability of the movement. Summary of the invention

[0004] The present application provides a hinge and a foldable device with a simple structure and good movement stability.

[0005] In the first aspect, the present application provides a hinge, which may include a main shaft, a first folding component and a second folding component, wherein the first folding component and the second folding component are arranged on both sides of the main shaft, and the first folding component and the second folding component can rotate relative to each other about the main shaft, so as to realize the foldable function of the hinge. Wherein, the first folding component may include a first rotating member and a first nested shaft. The first nested shaft is rotatably connected to the main shaft, the first rotating member is rotatably connected to the first nested shaft, and the rotation axis of the first rotating member coincides with the rotation axis of the first nested shaft, so as to realize the rotation connection between the first rotating member and the main shaft. In addition, the second folding component includes a second rotating member and a second nested shaft. The second nested shaft is rotatably connected to the main shaft, the second rotating member is rotatably connected to the second nested shaft, and the rotation axis of the second rotating member coincides with the rotation axis of the second nested shaft, so as to realize the rotation connection between the second rotating member and the main shaft. Wherein, the main shaft has a first arc surface, the first nested shaft has a second arc surface, and the first arc surface fits with the second arc surface, so as to realize the rotation connection between the first nested shaft and the main shaft. The first rotating member has a third arc surface, and the second nested shaft also has a fourth arc surface, and the third arc surface fits with the fourth arc surface, thereby realizing the rotational connection between the first rotating member and the first nested shaft. Among them, the axis of the first arc surface, the axis of the second arc surface, the axis of the third arc surface and the axis of the fourth arc surface all coincide, so that the rotation axis of the first rotating member and the rotation axis of the first nested shaft can coincide. The second folding component includes a second rotating member and a second nested shaft. The second rotating member can be connected to the main shaft through the second nested shaft. Specifically, the main shaft has a fifth arc surface, and the second nested shaft has a sixth arc surface, and the fifth arc surface fits with the sixth arc surface, thereby realizing the rotational connection between the second nested shaft and the main shaft. The second rotating member has a seventh arc surface, and the second nested shaft also has an eighth arc surface, and the seventh arc surface fits with the eighth arc surface, thereby realizing the rotational connection between the second rotating member and the second nested shaft. The axes of the fifth arcuate surface, the sixth arcuate surface, the seventh arcuate surface and the eighth arcuate surface all coincide with each other, so that the rotation axis of the second rotating member coincides with the rotation axis of the second nested shaft.

[0006] In the hinge provided in the present application, the hinge can be assembled by the first rotating member, the second rotating member, the main shaft, the first nested shaft and the second nested shaft, and the hinge has a good foldable function, and has the advantages of few components and simple structure. In addition, the first rotating member can be rotatably connected to the main shaft through the first nested shaft. The first rotating member and the first nested shaft can form a kinematic pair, and through the fitting of the third arc surface and the fourth arc surface, the first rotating member and the first nested shaft have a larger contact area, thereby improving the stability of the first rotating member and the first nested shaft during relative motion. The first nested shaft and the main shaft can form a kinematic pair, and through the fitting of the first arc surface and the second arc surface, the first nested shaft and the main shaft have a larger contact area, thereby improving the stability of the first nested shaft and the main shaft during relative motion. Correspondingly, the second rotating member can be rotatably connected to the main shaft through the second nested shaft. The second rotating member and the second nested shaft can form a kinematic pair, and the seventh arc surface and the eighth arc surface are fitted together, so that the second rotating member and the second nested shaft have a larger contact area, thereby improving the stability of the second rotating member and the second nested shaft during relative motion. The second nested shaft and the main shaft can form a kinematic pair, and the fifth arc surface and the sixth arc surface are fitted together, so that the second nested shaft and the main shaft have a larger contact area, thereby improving the stability of the second nested shaft and the main shaft during relative motion.

[0007] In one example, the first rotating member can also be directly connected to the main shaft for rotation, and the second rotating member can also be directly connected to the main shaft for rotation. That is, the first rotating member and the main shaft can be connected to each other for rotation via the first nested shaft, thereby effectively ensuring the stability of the first rotating member and the main shaft during relative rotation. In addition, the first rotating member can be further connected to the main shaft for rotation, thereby further improving the stability of the first rotating member and the main shaft during relative rotation. Correspondingly, the second rotating member and the main shaft can be connected to each other for rotation via the second nested shaft, thereby effectively ensuring the stability of the second rotating member and the main shaft during relative rotation. In addition, the second rotating member can also be directly connected to the main shaft for rotation, thereby further improving the stability of the second rotating member and the main shaft during relative rotation.

[0008] Among them, the first rotating member may have a first auxiliary arc surface, the main shaft may have a second auxiliary arc surface, the first auxiliary arc surface is fitted with the second auxiliary arc surface, and the axes of the first auxiliary arc surface, the first arc surface and the second auxiliary arc surface all coincide. The second rotating member may have a third auxiliary arc surface, the main shaft may have a fourth auxiliary arc surface, the third auxiliary arc surface and the fourth auxiliary arc surface are fitted, and the axes of the third auxiliary arc surface, the third arc surface and the fourth auxiliary arc surface all coincide. In summary, the first rotating member and the main shaft can be rotatably connected through the arc surface, which can effectively increase the contact area between the first rotating member and the main shaft, thereby improving the connection stability between the first rotating member and the main shaft. Correspondingly, the second rotating member and the main shaft can be rotatably connected through the arc surface, which can effectively increase the contact area between the second rotating member and the main shaft, thereby improving the connection stability between the second rotating member and the main shaft.

[0009] In a specific configuration, the main shaft may have a first arc-shaped groove, and the first nested shaft may have a first arc-shaped arm. The first arc-shaped arm may be slidably arranged in the first arc-shaped groove. The first arc-shaped surface is located on the inner wall of the first arc-shaped groove, and the second arc-shaped surface is located on the outer surface of the first arc-shaped arm, thereby realizing a rotational connection between the first nested shaft and the main shaft.

[0010] In addition, the first rotating member may have a second arc-shaped arm, and the first nested shaft may also have a second arc-shaped groove, and the second arc-shaped arm may be slidably disposed in the second arc-shaped groove, wherein the third arc-shaped surface is located on the outer surface of the second arc-shaped arm, and the fourth arc-shaped surface is located on the inner wall of the second arc-shaped groove, thereby realizing the rotational connection between the first nested shaft and the first rotating member. The axes of the first arc-shaped arm, the first arc-shaped groove, the second arc-shaped arm, and the second arc-shaped groove all coincide, thereby ensuring that the first rotating member can produce a smooth rotation relative to the main shaft.

[0011] The first nested shaft and the first rotating member are connected in rotation by contact between the arcuate surfaces, so that the first nested shaft and the first rotating member have a larger contact area, thereby improving the motion stability and force strength between the first nested shaft and the first rotating member. Correspondingly, the first nested shaft and the main shaft are connected in rotation by contact between the arcuate surfaces, so that the first nested shaft and the main shaft have a larger contact area, thereby improving the motion stability and force strength between the first nested shaft and the main shaft.

[0012] In addition, the main shaft can also have a third arc-shaped groove, and the second nested shaft can have a third arc-shaped arm, which can be slidably arranged in the third arc-shaped groove, wherein the fifth arc-shaped surface is located on the inner wall of the third arc-shaped groove, and the sixth arc-shaped surface is located on the outer surface of the third arc-shaped arm, thereby realizing the rotational connection between the second nested shaft and the main shaft.

[0013] The second rotating member may have a fourth arc-shaped arm, and the second nested shaft may also have a fourth arc-shaped groove, and the fourth arc-shaped arm may be slidably arranged in the fourth arc-shaped groove, wherein the seventh arc-shaped surface is located on the outer surface of the fourth arc-shaped arm, and the eighth arc-shaped surface is located on the inner wall of the fourth arc-shaped groove, thereby realizing the rotation connection between the second nested shaft and the main shaft. The axes of the third arc-shaped arm, the third arc-shaped groove, the fourth arc-shaped arm and the fourth arc-shaped groove all coincide, thereby ensuring that the second rotating member can rotate smoothly relative to the main shaft.

[0014] The second nested shaft and the second rotating member are connected in rotation by contact between the arcuate surfaces, so that the second nested shaft and the second rotating member have a larger contact area, thereby improving the motion stability and force strength between the second nested shaft and the second rotating member. Correspondingly, the second nested shaft and the main shaft are connected in rotation by contact between the arcuate surfaces, so that the second nested shaft and the main shaft have a larger contact area, thereby improving the motion stability and force strength between the second nested shaft and the main shaft.

[0015] In one example, the first rotating member may further have a fifth arc-shaped arm, which is slidably disposed in the first arc-shaped groove, wherein the first auxiliary arc-shaped surface is located on the outer surface of the fifth arc-shaped arm, and the second auxiliary arc-shaped surface is located on the inner wall of the first arc-shaped groove, thereby realizing the rotational connection between the first rotating member and the main shaft. The rotational connection between the first rotating member and the main shaft is realized through the contact between the arc-shaped surfaces, so that the first rotating member and the main shaft have a larger contact area, which can improve the motion stability and force strength between the first rotating member and the main shaft.

[0016] In addition, the second rotating member may also have a sixth arc-shaped arm, which is slidably disposed in the third arc-shaped groove, wherein the third auxiliary arc-shaped surface is located on the outer surface of the sixth arc-shaped arm, and the fourth auxiliary arc-shaped arm is located on the inner wall of the third arc-shaped groove, thereby realizing the rotational connection between the second rotating member and the main shaft. The rotational connection between the second rotating member and the main shaft is realized through the contact between the arc-shaped surfaces, so that the second rotating member and the main shaft have a larger contact area, which can improve the motion stability and force strength between the second rotating member and the main shaft.

[0017] In one example, the first rotating member may have a first abutting surface, and the first nested shaft may have a second abutting surface. When the first abutting surface abuts against the second abutting surface, the first rotating member is used to drive the first nested shaft to slide in the direction of leaving the first arc groove, so that the first rotating member has a larger rotation angle range. The main shaft has a first limiting surface, and the first nested shaft has a second limiting surface. When the first limiting surface abuts against the second limiting surface, the first nested shaft is prevented from sliding in the direction of leaving the first arc groove, thereby preventing the first nested shaft from leaving the main shaft, so as to ensure the reliability of the hinge.

[0018] In addition, the second rotating member may also have a third abutting surface, and the second nested shaft may have a fourth abutting surface. When the third abutting surface abuts against the fourth abutting surface, the second rotating member is used to drive the second nested shaft to slide in the direction of disengaging from the third arc groove, so that the second rotating member has a larger rotation angle range. The main shaft has a third limiting surface, and the second nested shaft has a fourth limiting surface. When the third limiting surface abuts against the fourth limiting surface, the second nested shaft is prevented from sliding in the direction of disengaging from the third arc groove, thereby preventing the second nested shaft from disengaging from the main shaft, so as to ensure the reliability of the hinge.

[0019] In one example, in a direction perpendicular to the tangent of the second arcuate surface, the cross section of the first nested shaft is an I-shaped. The first nested shaft has two second arcuate surfaces, and the two second arcuate surfaces are respectively located on two opposite surfaces of the first nested shaft. The first nested shaft has two second arcuate grooves, and the two second arcuate grooves are respectively located on two opposite sides of the first nested shaft. In a direction perpendicular to the tangent of the fourth arcuate surface, the cross section of the second nested shaft is an I-shaped. The second nested shaft has two fourth arcuate surfaces, and the two fourth arcuate surfaces are respectively located on two opposite surfaces of the second nested shaft, and the second nested shaft has two fourth arcuate grooves, and the two fourth arcuate grooves are respectively located on two opposite sides of the second nested shaft.

[0020] In one example, the first rotating member may have two second arc-shaped arms, and the two second arc-shaped arms are arranged opposite to each other, and the first nested shaft is clamped between the two second arc-shaped arms. The second rotating member may have two fourth arc-shaped arms, and the two fourth arc-shaped arms are arranged opposite to each other, and the second nested shaft is clamped between the two second arc-shaped arms.

[0021] In a specific configuration, the fifth arc-shaped arm may have a first protrusion extending in the axial direction, the first nested shaft may have a second protrusion extending in the axial direction, the first abutment surface may be located on the side of the first protrusion facing the second protrusion, and the second abutment surface may be located on the side of the second protrusion facing the first protrusion. Correspondingly, the sixth arc-shaped arm may have a third protrusion extending in the axial direction, the second nested shaft may have a fourth protrusion extending in the axial direction, the third abutment surface may be located on the side of the third protrusion facing the fourth protrusion, and the fourth abutment surface may be located on the side of the fourth protrusion facing the third protrusion.

[0022] In specific configuration, the second arc surface of the first nested shaft may have a first recessed portion, and the second limiting surface is located on the inner wall of the opening of the first recessed portion facing the first arc groove; the first arc surface has a first protrusion extending into the first recessed portion, and the first limiting surface is located on the side wall of the first protrusion facing the second limiting surface. Correspondingly, the sixth arc surface of the second nested shaft may have a second recessed portion, and the fourth limiting surface is located on the inner wall of the opening of the second recessed portion facing the third arc groove; the fifth arc surface has a second protrusion extending into the second recessed portion, and the third limiting surface is located on the side wall of the second protrusion facing the fourth limiting surface.

[0023] In one example, the first curved surface, the second curved surface, the third curved surface, the fourth curved surface, the fifth curved surface, the sixth curved surface, the first curved surface, and the inner concave surface of the eighth curved surface are all arranged toward the flexible screen. Alternatively, it can be understood that after the inner concave surfaces of the above-mentioned curved surfaces are all arranged toward the flexible screen, the hinge has the function of folding outwards, and when the hinge is in a folded state, the hinge can be located on the inner side of the flexible screen.

[0024] In one example, the main axis may have a supporting surface for supporting the flexible screen, and the supporting surface is U-shaped or elliptical. During the folding or unfolding of the flexible screen, the supporting surface can effectively support the flexible screen, and the supporting surface will not hinder the normal bending of the flexible screen or have other adverse effects.

[0025] In one example, the first rotating member may have a first supporting surface for supporting the flexible screen, and the second rotating member may have a second supporting surface for supporting the flexible screen. When the hinge is in a flattened state, the first supporting surface and the second supporting surface are both located in the same plane, thereby ensuring the flatness of the flexible screen.

[0026] In one example, when the hinge is in a flattened state, the support surface may not be higher than the reference plane, that is, the distance between the support surface and the back of the flexible screen may be greater than the distance between the first support surface, the second support surface and the back of the flexible screen, so that there is enough clearance between the support surface and the flexible screen.

[0027] In one example, the hinge may further include a synchronization component, which includes a first synchronization member and a second synchronization member. One end of the first synchronization member is slidably connected to the first rotating member, and the other end is rotationally connected to the main shaft, and the rotation axis of the first synchronization member is parallel to the rotation axis of the first rotating member. One end of the second synchronization member is slidably connected to the second rotating member, and the other end is rotationally connected to the main shaft, and the rotation axis of the second synchronization member is parallel to the rotation axis of the second rotating member. The first synchronization member has a first tooth-shaped portion, the second synchronization member has a second tooth-shaped portion, and the first tooth-shaped portion is meshed with the second tooth-shaped portion. Through the synchronization component, the first rotating member and the second rotating member can rotate toward each other or away from each other at the same speed, which can improve the stability of the hinge during folding or unfolding.

[0028] In a second aspect, the present application further provides a foldable device, which may include a first shell, a second shell and a flexible screen, and also includes the above-mentioned hinge. The first shell is fixedly connected to the first rotating member, the second shell is fixedly connected to the second rotating member, the first part of the flexible screen is connected to the first shell, and the second part of the flexible screen is fixedly connected to the second shell.

[0029] By applying the above-mentioned hinge, the number of parts used in the foldable device can be effectively reduced. In addition, the foldable device also has good stability during the unfolding or folding process, which is conducive to ensuring the smoothness and force stability during folding or unfolding. In addition, the first rotating member and the first shell can be connected in a fixed connection manner, and the second rotating member and the second shell can be connected in a fixed connection manner, which has the advantages of simple connection structure and high reliability.

[0030] In one example, the distance between the rotation axis of the first rotating member, the second rotating member, the first nested shaft, and the second nested shaft and the neutral layer of the flexible screen can be less than or equal to 1 mm. When the distance between the rotation axis of the first rotating member, the second rotating member, the first nested shaft, and the second nested shaft and the neutral layer of the flexible screen is small, it is conducive to achieving constant length management of the flexible screen. During the folding or unfolding process of the foldable device, the flexible screen is not easily subjected to tensile stress or extrusion stress, which helps to improve the safety of the flexible screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of the three-dimensional structure of a mobile phone provided in an embodiment of the present application when it is flattened;

[0032] Figure 2 A schematic diagram of the three-dimensional structure of a mobile phone provided in an embodiment of the present application when folded;

[0033] Figure 3 A schematic diagram of a three-dimensional structure of a hinge provided in an embodiment of the present application;

[0034] Figure 4 A schematic diagram of the exploded structure of a hinge provided in an embodiment of the present application;

[0035] Figure 5 A schematic diagram of a partial structure of a hinge provided in an embodiment of the present application;

[0036] Figure 6 A schematic diagram of a partial decomposition structure of a hinge provided in an embodiment of the present application;

[0037] Figure 7 A schematic diagram of a partial structure of a hinge provided in an embodiment of the present application;

[0038] Figure 8 A schematic diagram of a partial structure of a hinge provided in an embodiment of the present application;

[0039] Fig. 9 A schematic diagram of a partial structure of a hinge provided in an embodiment of the present application;

[0040] Fig.10 A schematic diagram of a partial decomposition structure of a hinge provided in an embodiment of the present application;

[0041] Fig.11 A schematic diagram of a cross-sectional structure of a hinge provided in an embodiment of the present application when it is folded;

[0042] Fig.12 A schematic diagram of a cross-sectional structure of a hinge provided in an embodiment of the present application when it is flattened;

[0043] Fig.13 A schematic diagram of the exploded structure of a foldable device provided in an embodiment of the present application when it is flattened;

[0044] Fig.14 A schematic diagram of the exploded structure of a foldable device provided in an embodiment of the present application when folded;

[0045] Fig.15 A schematic diagram of a partial cross-sectional structure of a foldable device provided in an embodiment of the present application when it is flattened;

[0046] Fig.16 A schematic diagram of the partial cross-sectional structure of a foldable device provided in an embodiment of the present application when folded. DETAILED DESCRIPTION

[0047] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings.

[0048] In order to facilitate understanding of the hinge provided in the embodiment of the present application, its application scenario is first introduced below.

[0049] The hinge provided in the embodiment of the present application can be applied to a foldable device, which is specifically an electronic device that can change its own shape by folding, rotating, etc. Under different usage requirements, users can fold and unfold the foldable device to meet different needs of users.

[0050] For example, when a user needs to carry a foldable device with him / her, he / she can fold it to reduce its volume, thereby improving portability. When a user is using a foldable device, he / she can unfold it to provide a larger display area and operation area, thereby improving convenience. In practical applications, foldable devices can be divided into many types, for example, foldable devices can be specifically mobile phones, tablet computers, laptop computers, e-books, etc.

[0051] like Figure 1 As shown, taking a mobile phone as an example, the mobile phone may include a first shell 02 and a second shell 03 connected by a hinge 01. Under the action of the hinge 01, the first shell 02 and the second shell 03 can rotate relative to each other, thereby realizing the folding function of the mobile phone. The flexible screen 04 (such as an OLED screen) can be set on the surface of the first shell 02 and the second shell 03. Figure 1 As shown, when the mobile phone is unfolded, the flexible screen 04 can provide a larger display area and operation area to improve the usability. Figure 2 As shown, when the mobile phone is folded, the flexible screen 04 can be located on the outside of the mobile phone, thereby reducing the area of ​​the mobile phone to improve the portability of the mobile phone.

[0052] In the current hinge 01, the contact surface between the kinematic pairs is small, which is not conducive to ensuring the smoothness during movement. Among them, the kinematic pairs refer to two parts that are in direct contact, and the two parts can produce relative movement. In hinge 01, in order to make hinge 01 have a larger folding or unfolding angle, multiple kinematic pairs are usually included. The hinge 01 has many components, which increases the difficulty of production and assembly, which will significantly increase the production cost of the foldable device and is not conducive to ensuring the reliability of the hinge. During the folding or unfolding process of hinge 01, the contact surface between the kinematic pairs is small, which is not conducive to ensuring the smoothness during movement.

[0053] To this end, an embodiment of the present application provides a hinge with a simple structure and good movement stability.

[0054] In order to make the objectives, technical solutions and advantages of the present application more clear, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0055] like Figure 3 , Figure 4 and Figure 5As shown, in an example provided in the present application, the hinge 10 may include a main shaft 11, a first folding component 12 and a second folding component 13, the first folding component 12 and the second folding component 13 are arranged on both sides of the main shaft 11, and the first folding component 12 and the second folding component 13 can rotate relative to the main shaft 11, so as to realize the foldable function of the hinge 10. Among them, the first folding component 12 may include a first rotating member 121 and a first nesting shaft 122. The first rotating member 121 may be connected to the main shaft 11 through the first nesting shaft 122. Specifically, as Figure 5 As shown, the main shaft 11 has a first arcuate surface 1111, and the first nested shaft 122 has a second arcuate surface 12211. The first arcuate surface 1111 fits with the second arcuate surface 12211, thereby realizing the rotational connection between the first nested shaft 122 and the main shaft 11. The first rotating member 121 has a third arcuate surface 12111, and the second nested shaft 122 also has a fourth arcuate surface 12221. The third arcuate surface 12111 fits with the fourth arcuate surface 12221, thereby realizing the rotational connection between the first rotating member 121 and the first nested shaft 122. Among them, the axis of the first arcuate surface 1111, the axis of the second arcuate surface 12211, the axis of the third arcuate surface 12111 and the axis of the fourth arcuate surface 12221 all coincide, so that the rotation axis of the first rotating member 121 and the rotation axis of the first nested shaft 122 can coincide. The second folding assembly 13 includes a second rotating member 131 and a second nesting shaft 132. The second rotating member 131 can be connected to the main shaft 11 through the second nesting shaft 132. Specifically, the main shaft 11 has a fifth arc surface 1131, and the second nesting shaft 132 has a sixth arc surface 13211. The fifth arc surface 1131 fits with the sixth arc surface 13211, thereby realizing the rotational connection between the second nesting shaft 132 and the main shaft 11. The second rotating member 131 has a seventh arc surface 13111, and the second nesting shaft 132 also has an eighth arc surface 13221. The seventh arc surface 13111 fits with the eighth arc surface 13221, thereby realizing the rotational connection between the second rotating member 131 and the second nesting shaft 132. The axes of the fifth arc surface 1131 , the sixth arc surface 13211 , the seventh arc surface 13111 and the eighth arc surface 13221 all coincide with each other, so that the rotation axis of the second rotating member 131 coincides with the rotation axis of the second nesting shaft 132 .

[0056] In the example provided in the present application, the first rotating member 121 can be rotatably connected to the main shaft 11 through the first nested shaft 122. The first rotating member 121 and the first nested shaft 122 can form a kinematic pair, and through the fit of the third arc surface 12111 and the fourth arc surface 12221, a larger contact area is provided between the first rotating member 121 and the first nested shaft 122, thereby improving the stability of the first rotating member 121 and the first nested shaft 122 during relative motion. The first nested shaft 122 and the main shaft 11 can form a kinematic pair, and through the fit of the first arc surface 1111 and the second arc surface 12211, a larger contact area is provided between the first nested shaft 122 and the main shaft 11, thereby improving the stability of the first nested shaft 122 and the main shaft 11 during relative motion. Correspondingly, the second rotating member 131 can be rotatably connected to the main shaft 11 through the second nested shaft 132. The second rotating member 131 and the second nested shaft 132 can form a kinematic pair, and the seventh arc surface 13111 and the eighth arc surface 13221 are fitted together, so that the second rotating member 131 and the second nested shaft 132 have a larger contact area, thereby improving the stability of the second rotating member 131 and the second nested shaft 132 during relative motion. The second nested shaft 132 and the main shaft 11 can form a kinematic pair, and the fifth arc surface 1131 and the sixth arc surface 13211 are fitted together, so that the second nested shaft 132 and the main shaft 11 have a larger contact area, thereby improving the stability of the second nested shaft 132 and the main shaft 11 during relative motion.

[0057] In summary, in the example provided in the present application, the hinge 10 can be assembled by the first rotating member 121, the second rotating member 131, the main shaft 11, the first nested shaft 122 and the second nested shaft 132, and the hinge 10 has a good foldable function, with the advantages of fewer components and simple structure. In addition, the first nested shaft 122 and the main shaft 11 and the first rotating member 121 are all rotatably connected through arc surfaces, and the second nested shaft 132 and the main shaft 11 and the second rotating member 131 are all rotatably connected through arc surfaces, which can effectively improve the stability and reliability of the hinge 10 during movement.

[0058] It should be noted that if Figure 3 and Figure 4As shown, in the example provided in the present application, the hinge 10 includes two first nested shafts 122 and two second nested shafts 132, and the two first nested shafts 122 are spaced apart along the axial direction of the main shaft 11, and the two second nested shafts 132 are spaced apart along the axial direction of the main shaft 11. That is, the first rotating member 121 can be connected to the main shaft 11 through the two first nested shafts 122, and the second rotating member 131 can be connected to the main shaft 11 through the two second nested shafts 132. In other examples, one, three or more first nested shafts 122 can be provided, and one, three or more second nested shafts 132 can be provided. In actual application, the number and position of the first nested shafts 122 and the second nested shafts 132 can be reasonably set according to actual needs, which will not be elaborated here.

[0059] In addition, in a specific configuration, the specific structure for realizing the rotational connection between the first nested shaft 122 and the main shaft 11 and the first rotating member 121 can be various.

[0060] For example, Figure 5 , Figure 6 and Figure 7 As shown, in an example provided in the present application, the main shaft 11 has a first arcuate groove 111, and the first nested shaft 122 has a first arcuate arm 1221, and the first arcuate arm 1221 is slidably disposed in the first arcuate groove 111. The first arcuate surface 1111 is located on the inner wall of the first arcuate groove 111, and the second arcuate surface 12211 is located on the outer surface of the first arcuate arm 1221. The first arcuate surface 1111 fits with the second arcuate surface 12211, thereby realizing the rotation connection between the first nested shaft 122 and the main shaft 11. In addition, the first rotating member 121 has a second arc-shaped arm 1211, and the first nested shaft 122 also has a second arc-shaped groove 1222. The second arc-shaped arm 1211 is slidably disposed in the second arc-shaped groove 1222. The third arc-shaped surface 12111 is located on the outer surface of the second arc-shaped arm 1211, and the fourth arc-shaped surface 12221 is located on the inner wall of the second arc-shaped groove 1222. The third arc-shaped surface 12111 fits with the fourth arc-shaped surface 12221, thereby realizing the rotational connection between the first nested shaft 122 and the first rotating member 121. The axes of the first arc-shaped arm 1221, the first arc-shaped groove 111, the second arc-shaped arm 1211, and the second arc-shaped groove 1222 all coincide, that is, the axes of the first arc-shaped surface 1111, the second arc-shaped surface 12211, the third arc-shaped surface 12111, and the fourth arc-shaped surface 12221 all coincide.

[0061] In the example provided in the present application, the first nested shaft 122 and the first rotating member 121 are rotationally connected by contact between arcuate surfaces, so that the first nested shaft 122 and the first rotating member 121 have a larger contact area, thereby improving the motion stability and force strength between the first nested shaft 122 and the first rotating member 121. Correspondingly, the first nested shaft 122 and the main shaft 11 are rotationally connected by contact between arcuate surfaces, so that the first nested shaft 122 and the main shaft 11 have a larger contact area, thereby improving the motion stability and force strength between the first nested shaft 122 and the main shaft 11.

[0062] In other examples, an arc groove similar to the first arc groove 111 may be provided in the first nested shaft 122, and an arc arm similar to the first arc arm 1221 may be provided in the main shaft 11. That is, the positions of the first arc groove 111 and the first arc arm 1221 may be interchangeable. In addition, an arc groove similar to the second arc groove 1222 may be provided in the first rotating member 121, and an arc arm similar to the second arc arm 1211 may be provided in the first nested shaft 122. That is, the positions of the second arc groove 1222 and the second arc arm 1211 may be interchangeable.

[0063] In addition, in the above examples, the first rotating member 121 can be rotationally connected to the main shaft 11 through the first nested shaft 122 . However, in other examples, the first rotating member 121 can also be directly rotationally connected to the main shaft 11 .

[0064] For example, Figure 5 and Figure 6 As shown, in an example provided in the present application, the first rotating member 121 further has a fifth arc-shaped arm 1213, and the fifth arc-shaped arm 1213 is slidably disposed in the first arc-shaped groove 111. The outer surface of the fifth arc-shaped arm 1213 has a first auxiliary arc-shaped surface 12131, and the inner wall of the first arc-shaped groove 111 has a second auxiliary arc-shaped surface 1113, and the first auxiliary arc-shaped surface 12131 fits with the second auxiliary arc-shaped surface 1113, thereby realizing the rotation connection between the first rotating member 121 and the main shaft 11. In addition, the axes of the first auxiliary arc-shaped surface 12131, the second auxiliary arc-shaped surface 113 and the first arc-shaped surface 1111 all coincide, so as to ensure the smooth rotation between the first rotating member 121 and the main shaft 11.

[0065] In the example provided in the present application, the first rotating member 121 and the main shaft 11 are rotationally connected through the contact between the arc surfaces, so that there is a larger contact area between the first rotating member 121 and the main shaft 11, thereby improving the movement stability and force strength between the first rotating member 121 and the main shaft 11.

[0066] In summary, in the example provided in the present application, the first rotating member 121 and the main shaft 11 can be rotationally connected via the first nested shaft 122, thereby effectively ensuring the stability of the first rotating member 121 and the main shaft 11 during relative rotation. In addition, the first rotating member 121 can also be directly rotationally connected to the main shaft 11, thereby further improving the stability of the first rotating member 121 and the main shaft 11 during relative rotation. Figure 5 and Figure 6 As shown, in an example provided in the present application, in a direction perpendicular to the tangent of the second arc surface 12211, the cross section of the first nested shaft 122 is an I-shaped. The first nested shaft 122 has two second arc surfaces 12211, and the two second arc surfaces 12211 are respectively located on two opposite surfaces of the first nested shaft 122. The first nested shaft 122 has two second arc grooves 1222, and the two second arc grooves 1222 are respectively located on two opposite sides of the first nested shaft 122.

[0067] In addition, the first rotating member 121 has two second arc-shaped arms 1211, and the two second arc-shaped arms 1211 are arranged opposite to each other, and the first nested shaft 122 is clamped between the two second arc-shaped arms 1211, so that a reliable connection between the first rotating member 121 and the first nested shaft 122 can be achieved, and the first rotating member 121 and the first nested shaft 122 can be prevented from having an axial position offset.

[0068] In addition, the first rotating member 121 further has two fifth arc-shaped arms 1213 , and the two fifth arc-shaped arms 1213 are arranged opposite to each other. The two second arc-shaped arms 1211 are located between the two fifth arc-shaped arms 1213 , which can help improve the compactness of the structure of the second rotating member 121 .

[0069] In addition, if Figure 5 , Figure 6 and Figure 7 As shown, in an example provided in the present application, the first rotating member 121 has a first abutting surface 1212, and the first nested shaft 122 has a second abutting surface 1223. When the first abutting surface 1212 and the second abutting surface 1223 abut against each other, the first rotating member 121 is used to drive the first nested shaft 122 to slide in a direction away from the first arc groove 111 (such as rotating in a clockwise direction). Specifically, the fifth arc arm 1213 has a first protrusion 12120 extending in the axial direction, and the first nested shaft 122 has a second protrusion 12230 extending in the axial direction. After the first rotating member 121 and the first nested shaft 122 are assembled, the first abutting surface 1212 is located on the side of the first protrusion 12120 facing the second protrusion 12230, and the second abutting surface 1223 is located on the side of the second protrusion 12230 facing the first protrusion 12120.

[0070] In addition, the main shaft 11 has a first limiting surface 112, and the first nested shaft 122 has a second limiting surface 1224. When the first limiting surface 112 and the second limiting surface 1224 abut against each other, the first nested shaft 122 is prevented from sliding in a direction away from the first arc groove 111 (such as rotating in a clockwise direction), thereby preventing the first nested shaft 122 from being separated from the main shaft 11. The second arc surface 12211 of the first nested shaft 122 has a first recessed portion 12240. After the first nested shaft 122 is assembled with the main shaft 11, the second limiting surface 1224 is located on the inner wall of the first recessed portion 12240 facing the opening of the first arc groove 111. The first arc surface 1111 has a first protrusion 1120 extending into the first recessed portion 12240, and the first limiting surface 112 is located on the side wall of the first protrusion 1120 facing the second limiting surface 1224.

[0071] Please refer to Figures 5 to 9 .like Figure 7 As shown, at this time, the hinge 10 is in a completely folded state, and the first nesting axis 122 is located in the first arc-shaped groove 111. Figure 8 As shown, after the first rotating member 121 rotates clockwise by a certain angle (such as about 45°) under the action of external force, the hinge 10 is gradually unfolded. At this time, the first abutting surface 1212 abuts against the second abutting surface 1223 (not shown in the figure). Fig. 9 As shown, when the first rotating member 121 continues to rotate in the clockwise direction under the action of external force, the first rotating member 121 can apply a force to the second abutting surface 1223 of the first nested shaft 122 through the first abutting surface 1212, so that the first nested shaft 122 rotates in the clockwise direction along with the first rotating member 121, thereby causing the first nested shaft 122 to slide in the direction of disengaging from the first arc-shaped groove 111. In addition, when the first rotating member 121 rotates a certain angle (such as about 90°), the hinge 10 is in a flattened state. At this time, the first limiting surface 112 and the second limiting surface 1224 abut against each other, and the main shaft 11 can prevent the first nested shaft 122 from continuing to rotate in the clockwise direction, thereby preventing the first nested shaft 122 from disengaging from the first arc-shaped groove 111. In addition, since the first abutting surface 1212 and the second abutting surface 1223 are in abutting state at this time, when the first limiting surface 112 and the second limiting surface 1224 abut, the first rotating member 121 can be prevented from continuing to rotate in the clockwise direction, thereby preventing the hinge 10 from being over-expanded.

[0072] It should be noted that, in the above example, when the first rotating member 121 rotates about 45° in the clockwise direction, the first abutting surface 1212 and the second abutting surface 1223 abut against each other. In actual application, the first abutting surface 1212 and the second abutting surface 1223 may abut against each other when the first rotating member 121 rotates about 30°, 40° or 60° in the clockwise direction, and the present application does not impose any restrictions on this. In addition, when the first rotating member 121 rotates about 90° in the clockwise direction, the first limiting surface 112 and the second limiting surface 1224 abut against each other, that is, the range in which the first rotating member 121 can rotate is about 90°. In actual application, the maximum rotation angle of the first rotating member 121 may also be 80°, 95° or 100°, and the present application does not impose any restrictions on this.

[0073] It is understandable that in the hinge 10 provided in the embodiment of the present application, the first folding component 12 and the second folding component 13 are respectively arranged on both sides of the main shaft 11, and the structural types of the first folding component 12 and the second folding component 13 can be substantially the same, so when the second folding component 13 is specifically arranged, it can be arranged correspondingly with reference to the specific structure of the first folding component 12. In addition, the connection structure between the main shaft 11 and the second folding component 13 can also be arranged correspondingly with reference to the connection structure between the main shaft 11 and the first folding component 12, which will not be described in detail here.

[0074] In simple terms, Figure 5 and Fig.10As shown, the main shaft 11 also has a third arc groove 113, and the second nested shaft 132 has a third arc arm 1321, and the third arc arm 1321 is slidably arranged in the third arc groove 113. The fifth arc surface 1131 is located on the inner wall of the third arc groove 113, and the sixth arc surface 13211 is located on the outer surface of the third arc arm 1321. The fifth arc surface 1131 is fitted with the sixth arc surface 13211, so as to realize the rotation connection between the second nested shaft 132 and the main shaft 11. In addition, the second rotating member 131 has a fourth arc-shaped arm 1311, and the second nesting shaft 132 also has a fourth arc-shaped groove 1322. The fourth arc-shaped arm 1311 is slidably disposed in the fourth arc-shaped groove 1322. The seventh arc-shaped surface 13111 is located on the outer surface of the fourth arc-shaped arm 1311, and the eighth arc-shaped surface 13221 is located on the inner wall of the fourth arc-shaped groove 1322. The seventh arc-shaped surface 13111 fits with the eighth arc-shaped surface 13221, thereby realizing the rotation connection between the second nesting shaft 132 and the second rotating member 131. Among them, the axes of the third arc-shaped arm 1321, the third arc-shaped groove 113, the fourth arc-shaped arm 1311 and the fourth arc-shaped groove 1322 all coincide. That is, the axis centers of the fifth arc surface 1131 , the sixth arc surface 13211 , the seventh arc surface 13111 and the eighth arc surface 13221 all coincide with each other, so that the rotation axis center of the second rotating member 131 coincides with the rotation axis center of the second nesting shaft 132 .

[0075] In addition, the second rotating member 131 also has a third abutting surface 1312, and the second nested shaft 132 has a fourth abutting surface 1323. When the third abutting surface 1312 and the fourth abutting surface 1323 abut against each other, the second rotating member 131 is used to drive the second nested shaft 132 to slide in a direction of disengaging from the third arc groove 113. Among them, the sixth arc arm 1313 has a third protruding portion 13120 extending axially, and the second nested shaft 132 has a fourth protruding portion 13230 extending axially. After the second rotating member 131 and the second nested shaft 132 are assembled, the third abutting surface 1312 is located on the side of the third protruding portion 13120 facing the fourth protruding portion 13230, and the fourth abutting surface 1323 is located on the side of the fourth protruding portion 13230 facing the third protruding portion 13120.

[0076] In addition, the main shaft 11 has a third limiting surface 114, and the second nested shaft 132 has a fourth limiting surface 1324. When the third limiting surface 114 and the fourth limiting surface 1324 abut against each other, the second nested shaft 132 is prevented from sliding in the direction of disengaging from the third arc groove 113, thereby preventing the second nested shaft 132 from disengaging from the main shaft 11. The sixth arc surface 13211 of the second nested shaft 132 has a second recessed portion 13240. After the main shaft 11 and the second nested shaft 132 are assembled, the fourth limiting surface 1324 is located on the inner wall of the second recessed portion 13240 facing the opening of the third arc groove 113. The fifth arc surface 1131 has a second protrusion 1140 extending into the second recessed portion 13240, and the third limiting surface 114 is located on the side wall of the second protrusion 1140 facing the fourth limiting surface 1324.

[0077] In addition, the second rotating member 131 has a sixth arc-shaped arm 1313, which is slidably disposed in the third arc-shaped groove 113, thereby realizing the rotational connection between the second rotating member 131 and the main shaft 11. The outer surface of the sixth arc-shaped arm 1313 has a third auxiliary arc-shaped surface 13131, and the inner wall of the third arc-shaped groove 113 has a fourth auxiliary arc-shaped surface 1114, and the third auxiliary arc-shaped surface 13131 fits with the fourth auxiliary arc-shaped surface 1114, thereby realizing the rotational connection between the second rotating member 131 and the main shaft 11.

[0078] In addition, if Fig.11 and Fig.12 As shown, in an example provided in the present application, the hinge 10 may further include a synchronization component 14. The first folding component 12 and the second folding component 13 may be rotated synchronously by the synchronization component 14. Specifically, the synchronization component 14 may include a first synchronization member 141 and a second synchronization member 142. One end of the first synchronization member 141 is slidably connected to the first rotating member 121, and the other end is rotationally connected to the main shaft 11, and the rotation axis of the first synchronization member 141 is parallel to the rotation axis of the first rotating member 121. One end of the second synchronization member 142 is slidably connected to the second rotating member 131, and the other end is rotationally connected to the main shaft 11, and the rotation axis of the second synchronization member 142 is parallel to the rotation axis of the second rotating member 131. In addition, the first synchronization member 141 has a first toothed portion 1411, the second synchronization member 142 has a second toothed portion 1421, and the first toothed portion 1411 is meshed with the second toothed portion 1421.

[0079] Specifically, the first rotating member 121 has a first slide groove 1214, one end of the first synchronous member 141 is located in the first slide groove 1214 and slides with the inner wall of the first slide groove 1214 to achieve a sliding connection between the first rotating member 121 and the first synchronous member 141, so that the first synchronous member 141 can rotate together with the first rotating member 121. The second rotating member 131 has a second slide groove 1314, one end of the second synchronous member 142 is located in the second slide groove 1314 and slides with the inner wall of the second slide groove 1314, so that the second synchronous member 142 can rotate together with the second rotating member 131.

[0080] In actual use, when an external force (such as a human hand) is applied to the first rotating member 121 and the second rotating member 131 to fold or unfold the hinge 10, the first rotating member 121 can drive the first synchronous member 141 to rotate together with the first rotating member 121, and the second rotating member 131 can drive the second synchronous member 142 to rotate together with the second rotating member 131. In addition, since the first tooth-shaped portion 1411 of the first synchronous member 141 and the second tooth-shaped portion 1421 of the second synchronous member 142 are meshed with each other, the first synchronous member 141 and the second synchronous member 142 can rotate toward or away from each other at the same rotation speed. Accordingly, the first rotating member 121 and the second rotating member can rotate toward or away from each other at the same rotation speed, thereby realizing the synchronous rotation of the first folding component 12 and the second folding component 13.

[0081] It is understandable that, in practical applications, the first toothed portion 1411 and the second toothed portion 1421 may also be meshed through two or more gears, thereby realizing a transmission connection between the first toothed portion 1141 and the second toothed portion 1421. Alternatively, in other examples, the synchronization assembly 14 may also adopt a currently more commonly used type, which will not be described in detail herein.

[0082] In addition, if Fig.13 and Fig.14 As shown, it is a schematic diagram of the exploded structure of a foldable device 20 provided in an embodiment of the present application.

[0083] The foldable device 20 may include a first housing 21, a second housing 22 and a flexible screen 23, and also includes the above-mentioned hinge 10. The first housing 21 is fixedly connected to the first rotating member 121, the second housing 22 is fixedly connected to the second rotating member 131, the first part 231 of the flexible screen 23 is connected to the first housing 21, and the second part 232 of the flexible screen 23 is fixedly connected to the second housing 22.

[0084] In an example provided in the present application, the first shell 21 has a first mounting surface 211 for mounting the flexible screen 23 , and the second shell 12 has a second mounting surface 221 for mounting the flexible screen 23 .

[0085] In addition, if Fig.13 As shown, the main shaft 11 has a supporting surface 115 for supporting the flexible screen 23 . The supporting surface 115 is roughly U-shaped and has a curved surface 1151 , a curved surface 1152 , and a plane 1153 located between the curved surface 1151 and the curved surface 1152 .

[0086] In addition, the first rotating member 121 has a first supporting surface 1215 for supporting the flexible screen, and the second rotating member 131 has a second supporting surface 1315 for supporting the flexible screen 23. When the hinge 10 is in a flattened state, the first supporting surface 1215 and the second supporting surface 1315 are both located in the reference plane.

[0087] In actual application, the back side of the flexible screen 23 (ie, the surface opposite to the display surface) can be fixedly connected to the first rotating member 121 , the second rotating member 131 and the main shaft 11 .

[0088] like Fig.15 and Fig.16 As shown, specifically, the back of the flexible screen 23 can be bonded and fixed to the first support surface 1215 by the adhesive 31, and bonded and fixed to the second support surface 1315 by the adhesive 32. When the foldable device is folded or unfolded, the first rotating member 121 and the second rotating member 131 can drive the flexible screen 23 to fold or unfold. Among them, when the foldable device is in a folded posture, the flexible screen 23 is wrapped around the outside of the first rotating member 121, the main shaft 11 and the second rotating member 131, and the first supporting surface 1215, the second supporting surface 1315 and the supporting surface 115 can effectively support the flexible screen 23. Among them, the supporting surface 115 is arc-shaped, so when the flexible screen 23 is folded, the arc surface 1151, the arc surface 1152 and the plane 1153 can still effectively support the flexible screen 23. When the area of ​​the flexible screen 23 corresponding to the support surface 115 is squeezed or collided by the outside world, the support surface 115 can effectively prevent the flexible screen 23 from being sunken, creased, broken, and other undesirable conditions, and can effectively improve the safety of the flexible screen 23. In addition, when the foldable device is in a flattened state, the plane can effectively support the flexible screen 23. When the flexible screen 23 is touched or pressed by a human hand, the plane, the first support surface 1215, and the second support surface 1315 can provide effective support for the flexible screen 23 to prevent the flexible screen 23 from being pressed to produce deformation or cracks and other undesirable conditions. Of course, in some cases, when the flexible screen 23 is pressed and the back of the flexible screen 23 contacts the curved surface 1151 and the curved surface 1152, the curved surface 1151 and the curved surface 1152 can also effectively support the flexible screen 23, which can prevent the flexible screen 23 from having a large bending deformation, thereby ensuring the safety of the flexible screen 23.

[0089] In summary, in the example provided in the present application, after the support surface 115 is set to be U-shaped, the support surface 115 can effectively support the flexible screen 23 during the unfolding or folding process of the flexible screen 23. In addition, during the folding process of the flexible screen 23, the U-shaped support surface 115 will not affect the normal bending of the flexible screen 23, which is conducive to ensuring the safety of the use of the flexible screen 23.

[0090] It can be understood that in the example provided in the present application, the back side of the flexible screen 23 can also be bonded and fixed to the plane 1153 by the adhesive 33, so as to effectively prevent the flexible screen 23 from having undesirable conditions such as bulging.

[0091] In addition, in the specific configuration, the thickness of the adhesive backing 33 may be slightly greater than or equal to the thickness of the adhesive backing 31 and the adhesive backing 32. Alternatively, it can be understood that when the hinge 10 is in a flattened state, the support surface 115 is not higher than the plane where the first support surface 1215 and the second support surface 1315 are located. That is, the distance between the support surface 115 and the back of the flexible screen 23 may be greater than the distance between the first support surface 1215, the second support surface 1315 and the back of the flexible screen 23. Thus, there is enough clearance between the support surface 115 and the flexible screen 23, and when the bending area 233 of the flexible screen 23 is bent, the support surface 115 will not generate a large squeezing force on the bending area 233.

[0092] In addition, in the specific setting, the distance between the rotation axis A1 of the first rotating member 121 and the first nested shaft 122, the rotation axis A2 of the second rotating member 131 and the second nested shaft 132 and the neutral layer of the flexible screen 23 can be less than or equal to 1 mm. When the distance between the rotation axis of the first rotating member 121, the second rotating member 131, the first nested shaft 122 and the second nested shaft 132 and the neutral layer of the flexible screen 23 is small, it is conducive to achieving constant length management of the flexible screen 23. During the folding or unfolding process of the foldable device 20, the flexible screen 23 is not easily subjected to tensile stress or extrusion stress, which helps to improve the safety of the flexible screen 23.

[0093] Among them, the neutral layer refers to: when the flexible screen 23 is bent, the outer layer (such as the layer close to the display surface) is subjected to tensile stress, and the inner layer (such as the layer close to the back surface) is subjected to compressive stress. There is a transition layer between the outer layer and the inner layer that is not subjected to tensile stress or compressive stress. This transition layer can be called the neutral layer of the flexible screen 23.

[0094] It is understandable that, in actual applications, the hinge 10 can also be applied to other electronic devices that have folding requirements, and the present application does not limit the specific application scenarios of the hinge 10 and the types of foldable devices.

[0095] In the various embodiments of the present application, unless otherwise specified or provided for in any logical conflict, the terms and / or descriptions between the different embodiments are consistent and may be referenced to each other, and the technical features in the different embodiments may be combined to form new embodiments according to their inherent logical relationships.

[0096] In this application, "multiple" means two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural.

[0097] It is understood that the various numbers involved in the embodiments of the present application are only for the convenience of description and are not used to limit the scope of the embodiments of the present application. The size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic.

Claims

1. A hinge, characterized in that: It comprises a main shaft, a first folding assembly and a second folding assembly, wherein the first folding assembly and the second folding assembly are arranged on both sides of the main shaft; The first folding assembly includes a first rotating member and a first nesting shaft; The main shaft has a first arcuate surface, the first nested shaft has a second arcuate surface, and the first arcuate surface fits the second arcuate surface; The first rotating member has a third arcuate surface, the second nested shaft has a fourth arcuate surface, and the third arcuate surface is in contact with the fourth arcuate surface; The axis of the first arcuate surface, the axis of the second arcuate surface, the axis of the third arcuate surface and the axis of the fourth arcuate surface all coincide with each other; The second folding assembly includes a second rotating member and a second nesting shaft; The main shaft has a fifth arc-shaped surface, the second nested shaft has a sixth arc-shaped surface, and the fifth arc-shaped surface is in contact with the sixth arc-shaped surface; The second rotating member has a seventh arcuate surface, the second nested shaft has an eighth arcuate surface, and the seventh arcuate surface is in contact with the eighth arcuate surface; Among them, the axis center of the fifth arcuate surface, the axis center of the sixth arcuate surface, the axis center of the seventh arcuate surface and the axis center of the eighth arcuate surface all coincide with each other.

2. The hinge according to claim 1, characterized in that: The first rotating member has a first auxiliary arc surface, the main shaft has a second auxiliary arc surface, the first auxiliary arc surface is in contact with the second auxiliary arc surface, and the axes of the first auxiliary arc surface, the first arc surface and the second auxiliary arc surface are all coincident; The second rotating member has a third auxiliary arc surface, the main shaft has a fourth auxiliary arc surface, the third auxiliary arc surface and the fourth auxiliary arc surface are in contact with each other, and the axes of the third auxiliary arc surface, the third arc surface and the fourth auxiliary arc surface are coincident.

3. The hinge according to claim 1 or 2, characterized in that: The main shaft has a first arc-shaped groove, and the first nested shaft has a first arc-shaped arm, and the first arc-shaped arm is slidably arranged in the first arc-shaped groove; wherein the first arc-shaped surface is located on the inner wall of the first arc-shaped groove, and the second arc-shaped surface is located on the outer surface of the first arc-shaped arm; The first rotating member has a second arc-shaped arm, the first nesting shaft also has a second arc-shaped groove, and the second arc-shaped arm is slidably arranged in the second arc-shaped groove; wherein the third arc-shaped surface is located on the outer surface of the second arc-shaped arm, and the fourth arc-shaped surface is located on the inner wall of the second arc-shaped groove; The main shaft also has a third arc-shaped groove, and the second nested shaft has a third arc-shaped arm, and the third arc-shaped arm is slidably arranged in the third arc-shaped groove; wherein the fifth arc-shaped surface is located on the inner wall of the third arc-shaped groove, and the sixth arc-shaped surface is located on the outer surface of the third arc-shaped arm; The second rotating member has a fourth arc-shaped arm, and the second nested shaft also has a fourth arc-shaped groove, and the fourth arc-shaped arm can be slidably arranged in the fourth arc-shaped groove; wherein the seventh arc-shaped surface is located on the outer surface of the fourth arc-shaped arm, and the eighth arc-shaped surface is located on the inner wall of the fourth arc-shaped groove.

4. The hinge according to claim 3, characterized in that: The first rotating member further comprises a fifth arc-shaped arm, and the fifth arc-shaped arm is slidably disposed in the first arc-shaped groove; wherein the first auxiliary arc-shaped surface is located on the outer surface of the fifth arc-shaped arm, and the second auxiliary arc-shaped surface is located on the inner wall of the first arc-shaped groove; The second rotating member also has a sixth arc-shaped arm, which is slidably disposed in the third arc-shaped groove; wherein the third auxiliary arc-shaped surface is located on the outer surface of the sixth arc-shaped arm, and the fourth auxiliary arc-shaped arm is located on the inner wall of the third arc-shaped groove.

5. The hinge according to claim 3 or 4, characterized in that: The first rotating member has a first abutting surface, and the first nested shaft has a second abutting surface; When the first abutting surface abuts against the second abutting surface, the first rotating member is used to drive the first nesting shaft to slide in a direction away from the first arc-shaped groove; The second rotating member also has a third abutting surface, and the second nested shaft has a fourth abutting surface; When the third abutting surface abuts against the fourth abutting surface, the second rotating member is used to drive the second nesting shaft to slide in a direction away from the third arc groove.

6. The hinge according to any one of claims 3 to 5, characterized in that: In a direction perpendicular to the tangent of the second arc-shaped surface, the cross section of the first nested shaft is an I-shape; The first nested shaft has two second arc-shaped surfaces, and the two second arc-shaped surfaces are respectively located on two opposite surfaces of the first nested shaft; The first nesting shaft has two second arc-shaped grooves, and the two second arc-shaped grooves are respectively located on two opposite sides of the first nesting shaft; In a direction perpendicular to a tangent line of the fourth arc-shaped surface, the cross section of the second nested shaft is an I-shape; The second nested shaft has two fourth arc-shaped surfaces, and the two fourth arc-shaped surfaces are respectively located on two surfaces of the second nested shaft that are away from each other; The second nesting shaft has two fourth arc-shaped grooves, and the two fourth arc-shaped grooves are respectively located on two opposite sides of the second nesting shaft.

7. The hinge according to claim 6, characterized in that: The first rotating member has two second arc-shaped arms, and the two second arc-shaped arms are arranged opposite to each other, and the first nested shaft is clamped between the two second arc-shaped arms; The second rotating member has two fourth arc-shaped arms, and the two fourth arc-shaped arms are arranged opposite to each other, and the second nested shaft is clamped between the two second arc-shaped arms.

8. The hinge according to claim 5, characterized in that: The fifth arc-shaped arm has a first protrusion extending in the axial direction, the first nested shaft has a second protrusion extending in the axial direction, the first abutting surface is located on the side of the first protrusion facing the second protrusion, and the second abutting surface is located on the side of the second protrusion facing the first protrusion; The sixth arc-shaped arm has a third protrusion extending axially, the second nested shaft has a fourth protrusion extending axially, the third abutment surface is located on the side of the third protrusion facing the fourth protrusion, and the fourth abutment surface is located on the side of the fourth protrusion facing the third protrusion.

9. The hinge according to any one of claims 3 to 8, characterized in that The main shaft has a first limiting surface, and the first nested shaft has a second limiting surface, and when the first limiting surface abuts against the second limiting surface, the first nested shaft is prevented from sliding in a direction away from the first arc-shaped groove; The main shaft has a third limiting surface, and the second nested shaft has a fourth limiting surface. When the third limiting surface abuts against the fourth limiting surface, the second nested shaft is prevented from sliding in a direction away from the third arc groove.

10. The hinge according to claim 9, characterized in that The second arc surface of the first nested shaft has a first recessed portion, and the second limiting surface is located on the inner wall of the first recessed portion facing the opening of the first arc groove; the first arc surface has a first protrusion extending into the first recessed portion, and the first limiting surface is located on the side wall of the first protrusion facing the second limiting surface; The sixth arc surface of the second nested shaft has a second recessed portion, and the fourth limiting surface is located on the inner wall of the opening of the second recessed portion facing the third arc-shaped groove; the fifth arc surface has a second protrusion extending into the second recessed portion, and the third limiting surface is located on the side wall of the second protrusion facing the fourth limiting surface.

11. The hinge according to any one of claims 1 to 10, characterized in that The main shaft has a supporting surface for supporting the flexible screen, and the supporting surface is U-shaped or elliptical.

12. The hinge according to claim 11, characterized in that The first curved surface, the second curved surface, the third curved surface, the fourth curved surface, the fifth curved surface, the sixth curved surface, the first curved surface and the inner concave surface of the eighth curved surface are all arranged toward the flexible screen.

13. The hinge according to claim 11 or 12, characterized in that: The first rotating member has a first supporting surface for supporting the flexible screen, and the second rotating member has a second supporting surface for supporting the flexible screen. When the hinge is in a flattened state, the first supporting surface and the second supporting surface are both located in the same plane, and the distance between the supporting surface and the back of the flexible screen is greater than the distance between the first supporting surface, the second supporting surface and the back of the flexible screen.

14. The hinge according to any one of claims 1 to 13, characterized in that The hinge further comprises a synchronization assembly, wherein the synchronization assembly comprises a first synchronization member and a second synchronization member; One end of the first synchronous member is slidably connected to the first rotating member, and the other end is rotatably connected to the main shaft, and the rotation axis of the first synchronous member is parallel to the rotation axis of the first rotating member; One end of the second synchronous member is slidably connected to the second rotating member, and the other end is rotatably connected to the main shaft, and the rotation axis of the second synchronous member is parallel to the rotation axis of the second rotating member; The first synchronizer has a first toothed portion, the second synchronizer has a second toothed portion, and the first toothed portion is drivingly connected to the second toothed portion.

15. A foldable device, characterized in that: The invention comprises a first housing, a second housing and a flexible screen, and further comprises a hinge as claimed in any one of claims 1 to 14; The first shell is fixedly connected to the first rotating member, and the second shell is fixedly connected to the second rotating member; The first part of the flexible screen is connected to the first shell, and the second part of the flexible screen is fixedly connected to the second shell.

16. The foldable device according to claim 15, characterized in that: The distance between the rotation axes of the first rotating member, the second rotating member, the first nested shaft and the second nested shaft and the neutral layer of the flexible screen is less than or equal to 1 mm.

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