Damping mechanism, hinge and foldable equipment

Abstract

The invention provides a damping mechanism, a hinge and foldable equipment, relates to the technical field of electronic equipment, and aims to solve the problems that a damping wheel of the damping mechanism is too large, and damping force release is single. The damping mechanism comprises a plurality of damping assemblies. Each damping assembly comprises a first damping wheel, a second damping wheel, a center rod and an elastic element. The first damping wheel and the second damping wheel can relatively rotate around the center rod, and the second damping wheel can move relative to the first damping wheel in the axis direction of the center rod. The elastic element is used for enabling the first damping surface of the first damping wheel to be in contact with the second damping surface of the second damping wheel; in the multiple damping assemblies, the second damping wheels are slidably connected in the axis direction of the center rod and fixed in the direction perpendicular to the axis of the center rod. In the damping mechanism provided by the invention, the elastic elements in different damping assemblies can independently apply acting force to the corresponding second damping wheels, so that reasonable release of damping force is facilitated, and the design flexibility can be improved.

Description

TECHNICAL FIELD

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

[0002] In a foldable device, two separate housings are usually included, and the two housings can be connected through a hinge to realize the foldable function. When a user needs to carry the foldable device, the foldable device can be folded to reduce its area, thereby improving portability. When the user uses the foldable device, the foldable device can be unfolded to provide a larger display area and operation area, thereby improving use convenience.

[0003] In the current hinge, a damping mechanism is mainly used to provide a damping force, which can ensure the safety and use experience of the foldable device. For example, when the foldable device is in a folded state, the damping force provided by the damping mechanism can prevent the foldable device from being accidentally unfolded, thereby ensuring the safety of the foldable device. Or, when the foldable device is in an unfolded state, the damping force provided by the damping mechanism can provide a reliable hovering function, thereby improving the use experience of the user.

[0004] However, in the current damping mechanism, the damping structure provides a damping force that is too large due to unreasonable structure arrangement, and the damping force provided is also relatively single. SUMMARY

[0005] The present application provides a damping mechanism, a hinge and a foldable device with reasonable damping force release and high design flexibility.

[0006] In a first aspect, the present application provides a damping mechanism, which includes a plurality of damping assemblies. Each damping assembly includes a first damping wheel, a second damping wheel, a center rod and an elastic element. The first damping wheel is connected to the center rod, and the second damping wheel is connected to the center rod. The first damping wheel and the second damping wheel can rotate relative to the center rod, and the second damping wheel can move relative to the first damping wheel along the axial direction of the center rod. The first damping wheel has a first damping surface, and the second damping wheel has a second damping surface. The first damping surface and the second damping surface are oppositely arranged so that the first damping surface and the second damping surface can be in contact. The elastic element is connected to the second damping wheel, and the elastic element is used to apply a force along the axial direction of the center rod to the second damping wheel so that the first damping surface and the second damping surface are in contact. In the plurality of damping assemblies, the center rods of each damping assembly are parallel to each other, at least two second damping wheels are slidingly connected along the axial direction of the center rod, and are fixed in the direction perpendicular to the axial direction of the center rod. That is, the two second damping wheels can independently slide along the respective center rods, and the two second damping wheels are restricted relative to each other to prevent the two second damping wheels from rotating relative to the respective center rods.

[0007] In the damping mechanism provided in the present application, in each damping assembly, the elastic element is used to apply a force to the second damping wheel along the axial direction of the central rod, so as to make the first damping surface of the first damping wheel contact the second damping surface of the second damping wheel. When the relative rotational movement between the first damping wheel and the second damping wheel occurs, the damping force is generated between the first damping surface and the second damping surface. In addition, in the two damping assemblies, the two second damping wheels can independently slide along the respective central rods, that is, the two second damping wheels can be decoupled in the axial direction. Therefore, when the second damping wheels in the two damping assemblies move in the axial direction, they do not affect each other, so that the elastic element can apply a force to the corresponding second damping wheel without applying a force to the other second damping wheel. This helps to reasonably release the damping force and improves the design flexibility.

[0008] In a specific arrangement, the plurality of damping assemblies are arranged at intervals in the direction perpendicular to the axial direction of the central rod. At least two adjacent second damping wheels are connected in sliding along the axial direction of the central rod and fixed in the direction perpendicular to the axial direction of the central rod. Alternatively, it can be understood that the two adjacent second damping wheels are connected to each other, so that the two second damping wheels are connected in sliding along the axial direction of the central rod and fixed in the direction perpendicular to the axial direction of the central rod. Alternatively, when the damping mechanism includes three or more damping assemblies, the two non-adjacent second damping wheels can also be connected to each other, so that the two second damping wheels are connected in sliding along the axial direction of the central rod and fixed in the direction perpendicular to the axial direction of the central rod.

[0009] In an example, in the plurality of damping assemblies, at least two second damping wheels are fixedly connected. Alternatively, it can be understood that the second damping wheels fixedly connected to each other can move simultaneously in the axial direction. After the at least two second damping wheels are fixedly connected, the complexity of the connection structure can be effectively reduced, which is beneficial to reduce the manufacturing cost. Alternatively, the at least two second damping wheels fixedly connected can also be an integral structure, which can reduce the number of parts used. Alternatively, the damping mechanism includes both the second damping wheels connected in sliding and the second damping wheels fixedly connected, which can improve the design flexibility of the damping mechanism and also facilitate to improve the diversity of the damping force released by the damping mechanism.

[0010] In an example, in the two second damping wheels connected in sliding along the axial direction of the central rod and fixed in the direction perpendicular to the axial direction of the central rod, the outer circumferential surface of one of the second damping wheels has a sliding groove, and the outer circumferential surface of the other second damping wheel has a protrusion, which is inserted into the sliding groove. That is, the two second damping wheels can be connected in sliding through the connection structure of the sliding groove and the protrusion, and the rotational movement of the second damping wheels can be prevented.

[0011] In an example, the first damping surface comprises at least one of a flat surface, an inclined surface or a curved surface. The second damping surface comprises at least one of a flat surface, an inclined surface or a curved surface. The types of the first damping surface and the second damping surface can be the same or different. In a specific arrangement, the specific types of the first damping surface and the second damping surface can be reasonably arranged according to actual needs.

[0012] In an example, the first damping surface further comprises a limiting recess, and the second damping surface further comprises a limiting protrusion. When the first damping wheel and the second damping wheel rotate relative to each other, the limiting protrusion can slide into or out of the limiting recess. When the limiting protrusion slides out of the limiting recess, a larger external force is required, and therefore, the hovering capability of the damping mechanism can be improved through the cooperation of the limiting protrusion and the limiting recess. The limiting protrusion can be one, two or more. The specific number of limiting recesses can be one, two or more.

[0013] In an example, in the plurality of damping assemblies, the elastic coefficients of the elastic elements are the same. Alternatively, in the plurality of damping assemblies, there are at least two elastic elements with different elastic coefficients, which has better design flexibility.

[0014] In an example, each damping assembly further comprises a first stopper and a second stopper. In any damping assembly, the central rod passes through the first stopper and the second stopper, and the central rod is fixed with the first stopper and the second stopper in the axial direction of the central rod. The first stopper is located on the side of the first damping wheel away from the second stopper, and the first stopper abuts against the first damping wheel to prevent the first damping wheel from moving away from the second damping wheel. The second stopper is located on the side of the second damping wheel away from the first damping wheel. The elastic element is located between the second damping wheel and the second stopper, one end of the elastic element abuts against the second damping wheel, and the other end of the elastic element abuts against the second stopper, so that the elastic force of the elastic element can be effectively applied to the second damping wheel, so that the second damping surface of the second damping wheel can abut against the first damping surface of the first damping wheel.

[0015] In an example, in any damping assembly, the central rod can rotate relative to the first stopper around the axis, and the plurality of first stoppers are fixedly connected. Alternatively, the plurality of first stoppers can be an integral structure, which can effectively reduce the number of parts used. In any damping assembly, the central rod can rotate relative to the second stopper around the axis, and the plurality of second stoppers are fixedly connected. Alternatively, the plurality of second stoppers can be an integral structure, which can effectively reduce the number of parts used.

[0016] In an example, the outer peripheral surface of each first damping wheel further comprises a toothed portion. In the plurality of damping assemblies, the toothed portions of the two adjacent first damping wheels are engaged, so that the plurality of first damping wheels can rotate synchronously.

[0017] In a second aspect, the present application provides a hinge, comprising a first rotating member, a second rotating member and the damping mechanism. A plurality of damping assemblies are arranged in sequence along a first direction, which is perpendicular to the axis of the central rod. The first rotating member and the second rotating member are fixedly connected with the two outermost first damping wheels respectively. When an external force acts on the first rotating member and the second rotating member to rotate, the two outermost first damping wheels can be driven to rotate, so that the damping force is generated between the first damping wheel and the second damping wheel, thereby improving the opening and closing force of the hinge.

[0018] In a third aspect, the present application provides a foldable device, comprising a first shell, a second shell and a flexible screen. The foldable device further comprises the hinge. The first shell is connected with the first rotating member, and the second shell is connected with the second rotating member. The first part of the flexible screen is connected with the first shell, and the second part of the flexible screen is fixedly connected with the second shell. In use, an acting force can be applied to the first shell and the second shell, so that the first shell and the second shell can rotate relatively, thereby realizing the folding or unfolding of the foldable device. In the foldable device provided by the present application, by adopting the above-mentioned hinge, the damping force of the foldable device during folding or unfolding can be effectively improved, and the safety and opening and closing feeling of the foldable device can be effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A perspective structural schematic diagram of a mobile phone in an unfolded state provided by an embodiment of the present application;

[0020] Figure 2 A perspective structural schematic diagram of a mobile phone in a folded state provided by an embodiment of the present application;

[0021] Figure 3 A structural schematic diagram of a damping mechanism provided by an embodiment of the present application;

[0022] Figure 4 A cross-sectional structural schematic diagram of a damping mechanism provided by an embodiment of the present application;

[0023] Figure 5 A structural schematic diagram of another damping mechanism provided by an embodiment of the present application;

[0024] Figure 6 A cross-sectional structural schematic diagram of another damping mechanism provided by an embodiment of the present application;

[0025] Figure 7 A cross-sectional structural schematic diagram of a damping mechanism provided by an embodiment of the present application; Figure 5 A cross-sectional structural schematic diagram of a damping mechanism provided by an embodiment of the present application;

[0026] Figure 8 A perspective structural schematic diagram of a first damping wheel and a second damping wheel provided by an embodiment of the present application;

[0027] Figure 9 Another perspective structural schematic view of the first damping wheel and the second damping wheel is provided in another embodiment of the present application;

[0028] Figure 10 Another perspective structural schematic view of the first damping wheel and the second damping wheel is provided in another embodiment of the present application;

[0029] Figure 11 Another perspective structural schematic view of the first damping wheel and the second damping wheel is provided in another embodiment of the present application;

[0030] Figure 12 Another structural schematic view of the damping mechanism is provided in another embodiment of the present application;

[0031] Figure 13 A perspective structural schematic view of the hinge is provided in another embodiment of the present application; Figure 12 A sectional structural schematic view of the hinge in the direction of B-B is provided in another embodiment of the present application;

[0032] Figure 14 A sectional structural schematic view of the second damping wheel of the damping mechanism is provided in another embodiment of the present application;

[0033] Figure 15 A structural schematic view of the hinge is provided in another embodiment of the present application;

[0034] Figure 16 An exploded structural schematic view of the hinge is provided in another embodiment of the present application;

[0035] Figure 17 An exploded structural schematic view of part of the hinge is provided in another embodiment of the present application;

[0036] Figure 18 An exploded structural schematic view of the foldable device is provided in another embodiment of the present application. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings.

[0038] In order to facilitate the understanding of the hinge provided in the embodiments of the present application, the application scenarios thereof will be introduced first below.

[0039] The hinge provided in the embodiments of the present application can be applied in a foldable device, which is specifically an electronic device capable of changing its own form by folding, rotating and the like. Under different use requirements, the user can fold and unfold the foldable device to meet different requirements of the user.

[0040] For example, when the user needs to carry the foldable device, the foldable device can be folded to reduce the volume and improve portability. When the user uses the foldable device, the foldable device can be unfolded to provide a larger display area and operation area, thereby improving the use convenience. In actual applications, the types of foldable devices can be various, for example, the foldable device can be a mobile phone, a tablet computer, a notebook computer, an electronic book, etc.

[0041] As shown in Figure 1 , taking a mobile phone as an example, the mobile phone can include a first housing 02 and a second housing 03 connected by a hinge 01. Under the action of the hinge 01, the first housing 02 and the second housing 03 can rotate relative to each other, thereby realizing the folding function of the mobile phone. A flexible screen 04 (such as an OLED screen) can be arranged on the surface of the first housing 02 and the second housing 03. As shown in Figure 1 , when the mobile phone is unfolded, the flexible screen 04 can provide a larger display area and operation area to improve the use performance. As shown in Figure 2 , 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.

[0042] In the current hinge 01, a damping mechanism (not shown in the figure) is usually included. The damping force provided by the damping mechanism can ensure the safety and use experience of the foldable device.

[0043] For example, as shown in Figure 1 , when the mobile phone is unfolded, the damping force provided by the damping mechanism can provide a reliable hovering function. Therefore, the mobile phone can be kept in an unfolded state to some extent to facilitate normal use by the user. Alternatively, as shown in Figure 2 , when the mobile phone is folded, the damping force provided by the damping mechanism can keep the mobile phone in a folded state to prevent the mobile phone from being accidentally unfolded, thereby ensuring the safety of the mobile phone.

[0044] In some damping mechanisms at present, due to unreasonable structure, the damping force provided by the damping mechanism is too large, and the damping force provided is also relatively single, which cannot guarantee the opening and closing feeling of the foldable device. For example, when the user unfolds the mobile phone in a folded state, due to the large damping force provided by the damping mechanism, it is not conducive to unfolding the mobile phone with a small force, and the risk of pinching the hand is also easy to occur. Alternatively, in some cases, due to the large damping force provided by the damping mechanism, the wear of some parts of the damping mechanism is aggravated, which is not conducive to ensuring the reliability of the damping mechanism.

[0045] Therefore, the embodiments of the present application provide a damping mechanism with reasonable damping force release and high design flexibility, and a hinge and a foldable device equipped with the damping mechanism.

[0046] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the parallelism or perpendicularity described below refers to approximate parallelism or perpendicularity, and is not limited to parallelism or perpendicularity in a strict sense. For example, parallelism refers to approximate parallelism, and there may be certain dimensional errors or angular deviations. Perpendicularity refers to approximate perpendicularity, and there may be certain dimensional errors or angular deviations.

[0047] like Figure 3 As shown, in one example provided in this application, the damping mechanism 10 includes two damping components, namely damping component 11a and damping component 11b.

[0048] The damping assembly 11a includes a first damping wheel 111a, a second damping wheel 112a, a central rod 113a, and an elastic element 114a. The first damping wheel 111a is connected to the central rod 113a, and the second damping wheel 112a is connected to the central rod 113a. The first damping wheel 111a and the second damping wheel 112a are rotatable relative to each other around the central rod 113a, and the second damping wheel 112a is movable relative to the first damping wheel 111a along the axial direction of the central rod 113a. The first damping wheel 111a has a first damping surface 1111a, and the second damping wheel 112a has a second damping surface 1121a; the first damping surface 1111a and the second damping surface 1121a are arranged opposite to each other. The elastic element 114a is connected to the second damping wheel 112a. The elastic element 114a applies a force to the second damping wheel 112a along the axial direction of the central rod 113a, causing the first damping surface 1111a and the second damping surface 1121a to come into contact. When the first damping surface 1111a and the second damping surface 1121a are in contact, and the first damping wheel 111a and the second damping wheel 112a rotate relative to each other under the action of an external force, a damping force is generated between the first damping surface 1111a and the second damping surface 1121a. The fact that the first damping wheel 111a and the second damping wheel 112a can rotate relative to each other about the central rod 113a means that, if the first damping wheel 111a is taken as a stationary reference frame, the second damping wheel 112a is rotating. Alternatively, if the second damping wheel 112a is taken as a stationary reference frame, the first damping wheel 111a is rotating.

[0049] like Figure 3As shown, the damping assembly 11b includes a first damping wheel 111b, a second damping wheel 112b, a central rod 113b, and an elastic element 114b. The first damping wheel 111b is connected to the central rod 113b, and the second damping wheel 112b is connected to the central rod 113b. The first damping wheel 111b and the second damping wheel 112b are rotatable relative to each other around the central rod 113b, and the second damping wheel 112b is movable relative to the first damping wheel 111b along the axial direction of the central rod 113b. The first damping wheel 111b has a first damping surface 1111b, and the second damping wheel 112b has a second damping surface 1121b, which are arranged opposite to each other. The elastic element 114b is connected to the second damping wheel 112b. The elastic element 114b applies a force to the second damping wheel 112b along the axial direction of the central rod 113b, causing the first damping surface 1111b and the second damping surface 1121b to come into contact. When the first damping surface 1111b and the second damping surface 1121b are in contact, and the first damping wheel 111b and the second damping wheel 112b rotate relative to each other under the action of an external force, a damping force is generated between the first damping surface 1111b and the second damping surface 1121b. The fact that the first damping wheel 111b and the second damping wheel 112b can rotate relative to each other about the central rod 113b means that, if the first damping wheel 111b is taken as a stationary reference frame, the second damping wheel 112b is rotating. Alternatively, if the second damping wheel 112b is taken as a stationary reference frame, the first damping wheel 111b is rotating.

[0050] Among them, center rods 113a and 113b are parallel to each other, and are spaced apart along a first direction. The first direction is perpendicular to the axis of center rod 113a (or center rod 113b). It should be noted that... Figure 3 In the example provided, the central rods 113a and 113b have essentially no displacement deviation in the axial direction, meaning that the ends of central rods 113a and 113b are roughly flush. In other examples, there may be displacement deviation between the central rods 113a and 113b in the axial direction. To facilitate understanding of the technical solution of this application, the following examples will exemplify the situation where the central rods 113a and 113b have essentially no displacement deviation in the axial direction.

[0051] The second damping wheel 112a and the second damping wheel 112b are connected and are slidably connected along the axis of the central rod 113a (or the central rod 113b), and are relatively fixed in a direction perpendicular to the axis of the central rod 113a (or the central rod 113b). Alternatively, it can be understood that the second damping wheel 112a can slide along the axis of the central rod 113a without causing the second damping wheel 112b to slide along with it. Correspondingly, the second damping wheel 112b can slide along the axis of the central rod 113b without causing the second damping wheel 112a to slide along with it.

[0052] In some embodiments, when the first damping wheel 111a rotates, the second damping wheel 112a does not rotate with the first damping wheel 111a, so that the first damping wheel 111a and the second damping wheel 112a can generate effective damping force when rotating relative to each other. Correspondingly, when the first damping wheel 111b rotates, the second damping wheel 112b does not rotate with the first damping wheel 111b, so that the first damping wheel 111b and the second damping wheel 112b can generate effective damping force when rotating relative to each other. For example, the second damping wheel 112a and the second damping wheel 112b can be relatively fixed in a direction perpendicular to the axis of the central rod 113a (or the central rod 113b), thereby enabling the second damping wheel 112a to not rotate with the first damping wheel 111a when the first damping wheel 111a rotates, and the second damping wheel 112b to not rotate with the first damping wheel 111b when the first damping wheel 111b rotates.

[0053] In summary, the second damping wheel 112a and the second damping wheel 112b do not restrict each other along the axial direction, allowing the second damping wheel 112a to slide independently along the axial direction of the central rod 113a, and the second damping wheel 112b to slide independently along the axial direction of the central rod 113b. Furthermore, the second damping wheels 112a and 112b restrict each other in the direction of rotation to prevent the second damping wheel 112a from rotating around the axis of the central rod 113a, and to prevent the second damping wheel 112b from rotating around the axis of the central rod 113b.

[0054] In one example, elastic element 114a applies an elastic force to the second damping wheel 112a, causing the second damping surface 1121a of the second damping wheel 112a to contact the first damping surface 1111a of the first damping wheel 111a. Elastic element 114b applies an elastic force to the second damping wheel 112b, causing the second damping surface 1121b of the second damping wheel 112b to contact the first damping surface 1111b of the first damping wheel 111b. That is, the elastic force applied by elastic element 114a acts on the second damping wheel 112a but not on the second damping wheel 112b. The elastic force applied by the elastic element 114b acts on the second damping wheel 112b but not on the second damping wheel 112a. This allows the elastic element 114a to independently control the pressure between the first damping surface 1111a and the second damping surface 1121a, and the elastic element 114b to independently control the pressure between the first damping surface 1111b and the second damping surface 1121b. This facilitates the proper release of damping force and improves design flexibility.

[0055] Alternatively, it can be understood that if the second damping wheel 112a and the second damping wheel 112b are fixedly connected, or if the second damping wheel 112a and the second damping wheel 112b are a single integral structure, the elastic force applied by the elastic element 114a will act simultaneously on both the second damping wheel 112a and the second damping wheel 112b. That is, the force on the second damping wheel 112a is the sum of the forces on the elastic elements 114a and 114b, and the force on the second damping wheel 112b is also the sum of the forces on the elastic elements 114a and 114b. Therefore, the pressure between the first damping wheel 111a and the second damping wheel 112a is relatively large, and the damping force generated by the first damping wheel 111a and the second damping wheel 112a is also relatively large. Correspondingly, the pressure between the first damping wheel 111b and the second damping wheel 112b is relatively large, and the damping force generated by the first damping wheel 111b and the second damping wheel 112b is also relatively large, which can easily lead to excessive wear and excessive damping force. In addition, the second damping wheel 112a and the second damping wheel 112b will slide together along the axis of the central rod 113a (or the central rod 113b) and cannot slide independently. Therefore, the damping components 11a and 11b will affect each other, reducing the flexibility of the damping force design of the entire damping mechanism 10.

[0056] However, in the example provided in this application, the second damping wheel 112a and the second damping wheel 112b do not restrict each other in the axial direction, allowing the second damping wheel 112a to slide independently along the axial direction of the central rod 113a, and the second damping wheel 112b to slide independently along the axial direction of the central rod 113b. Therefore, in practical use, at some rotation angles, the damping force of the entire damping mechanism 10 can be provided solely by the damping force generated by the first damping wheel 111a and the second damping wheel 112a. At other rotation angles, the damping force of the entire damping mechanism 10 can be provided solely by the damping force generated by the first damping wheel 111b and the second damping wheel 112b. Alternatively, at other rotation angles, the damping force of the entire damping mechanism 10 can be provided jointly by the first damping wheel 111a and the second damping wheel 112a, as well as the first damping wheel 111b and the second damping wheel 112b, thus providing good design flexibility.

[0057] It should be noted that, in practical applications, in order to enable the first damping wheel 111a and the second damping wheel 112a to rotate relative to each other around the axis of the central rod 113a, and the second damping wheel 112a to move relative to the first damping wheel 111a along the axial direction of the central rod 113a, the connection method between the first damping wheel 111a, the second damping wheel 112a and the central rod 113a can be varied.

[0058] For example, such as Figure 4 As shown, taking damping assembly 11a as an example. In one example provided in this application, the first damping wheel 111a has a through hole 1112a, the second damping wheel 112a has a through hole 1122a, and the central rod 113a passes through the through holes 1112a and 1122a, so that both the first damping wheel 111a and the second damping wheel 112a can rotate around the axis of the central rod 113a, and both the first damping wheel 111a and the second damping wheel 112a can move along the axis of the central rod 113a.

[0059] Specifically, in Figure 4 In the example, the central rod 113a passes through the through hole 1112a of the first damping wheel 111a, allowing the first damping wheel 111a to rotate relative to the central rod 113a about its axis; additionally, the first damping wheel 111a can move along the axis of the central rod 113a. The central rod 113a passes through the through hole 1122a of the second damping wheel 112a, allowing the second damping wheel 112a to rotate relative to the central rod 113a about its axis; additionally, the second damping wheel 112a can move along the axis of the central rod 113a. That is, the first damping wheel 111a and the second damping wheel 112a can rotate relative to each other about the axis of the central rod 113a, and the second damping wheel 112a can move relative to the first damping wheel 111a along the axial direction of the central rod 113a.

[0060] Understandably, in other examples, the center rod 113a may be fixedly connected to the first damping wheel 111a. The center rod 113a passes through the through hole 1122a of the second damping wheel 112a, allowing the second damping wheel 112a to rotate relative to the first damping wheel 111a and the center rod 113a about the axis of the center rod 113a, and the second damping wheel 112a can slide relative to the first damping wheel 111a and the center rod 113a along the axis of the center rod 113a.

[0061] Alternatively, the center rod 113a can be fixedly connected to the second damping wheel 112a. The center rod 113a passes through the through hole 1112a of the first damping wheel 111a, so that the first damping wheel 111a can rotate relative to the second damping wheel 112a and the center rod 113a about the axis of the center rod 113a, and the first damping wheel 111a can slide relative to the second damping wheel 112a and the center rod 113a along the axis of the center rod 113a.

[0062] In practical applications, the connection method between the first damping wheel 111a, the second damping wheel 112a and the center rod 113a can be reasonably selected according to actual needs, which will not be elaborated here.

[0063] In the damping assembly 11b, the connection between the first damping wheel 111b and the second damping wheel 112b and the central rod 113b can be similarly configured to the connection between the first damping wheel 111a and the second damping wheel 112a and the central rod 113a, and will not be described in detail here.

[0064] In one example provided in this application, in order to better bring the first damping wheel 111a and the second damping wheel 112b into contact to generate damping force, the damping mechanism 10 in this example also includes a plurality of stop members.

[0065] Specifically, such as Figure 5 As shown in the example provided in this application, the damping component 11a includes a first stop 115a and a second stop 116a, and the damping component 11b includes a first stop 115b and a second stop 116b.

[0066] like Figure 6As shown, taking damping assembly 11a as an example, one end of the central rod 113a has a positioning groove 1131a, and the other end has a positioning groove 1132a. The first stop 115a and the second stop 116a are both annular. The first stop 115a is fixedly engaged in the positioning groove 1131a, and the second stop 116a is fixedly engaged in the positioning groove 1132a. Furthermore, one side of the first stop 115a abuts against the first damping wheel 111a to prevent the first damping wheel 111a from sliding away from the second damping wheel 112a. The elastic element 114a is a helical spring, sleeved on the outer circumference of the central rod 113a. One end of the elastic element 114a abuts against the second damping wheel 112a, and the other end abuts against the second stop 116a. Under the elastic force of the elastic element 114a, the second damping wheel 112a can slide towards the first damping wheel 111a, so that the second damping surface 1121a of the second damping wheel 112a abuts against the first damping surface 1111a of the first damping wheel 111a. It is understood that in Figure 6 In the example provided, the first damping surface 1111a and the second damping surface 1121a are not offset to better show the first damping surface 1111a and the second damping surface 1121a.

[0067] It should be noted that, in the example provided in this application, one end of the elastic element 114a is connected to the second damping wheel 112a, thereby allowing an elastic force to be applied to the second damping wheel 112a. The other end of the elastic element 114a transmits the elastic force to the first damping wheel 111a through the path formed by the second stop 116a, the center rod 113a, and the first stop 115a, so that the first damping surface 1111a of the first damping wheel 111a contacts the second damping surface 1121a of the second damping wheel 112a.

[0068] In other examples, one end of the elastic element 114a can be connected to the second damping wheel 112a, and the other end can be directly connected to the first damping wheel 111a, so that the first damping surface 1111a and the second damping surface 1121a come into contact.

[0069] In summary, as long as the elastic force generated by the elastic element 114a is sufficient to bring the first damping surface 1111a into contact with the second damping surface 1121a, it is acceptable. In practical applications, the shape, location, and connection method of the elastic element 114a can be flexibly configured according to actual needs.

[0070] The structure of damping component 11b is similar to that of damping component 11a. When setting up damping component 11b, it can be set up similarly to damping component 11a. The specific structure of damping component 11b will not be described in detail here.

[0071] In practical applications, elastic elements 114a and 114b can also be elements such as spring sheets or rubber rings that can generate elastic force. This application does not limit the specific structural type of elastic elements 114a and 114b.

[0072] In practical applications, the connection structure between the second damping wheel 112a and the second damping wheel 112b can be varied.

[0073] For example, such as Figure 7 As shown, in one example provided in this application, the outer peripheral surface of the second damping wheel 112a has at least one protrusion 1123a, and the outer peripheral surface of the second damping wheel 112b has at least one groove 1124b. The protrusion 1123a extends along the axial direction of the central rod 113a, and the groove 1124b extends along the axial direction of the central rod 113b. The protrusion 1123a is inserted into the groove 1124b and is capable of sliding within the groove 1124b along the axial direction of the central rod 113a (or the central rod 113b). Furthermore, the protrusion 1123a abuts against the inner wall of the groove 1124b, preventing the second damping wheel 112a and the second damping wheel 112b from rotating.

[0074] Understandably, in other examples, the positions of the protrusion 1123a and the groove 1124b can also be interchanged. That is, the outer peripheral surface of the second damping wheel 112a can be provided with a groove, and the outer peripheral surface of the second damping wheel 112b can be provided with a protrusion. In one example, the cross-sectional shape of the protrusion 1123a and the groove 1123b can be a rectangle, a triangle, or other polygons, or other shapes.

[0075] Alternatively, in specific configurations, the second damping wheel 112a and the second damping wheel 112b can be connected by other connection structures to allow the second damping wheel 112a and the second damping wheel 112b to slide along the axial direction of the central rod 113a (or the central rod 113b) and prevent the second damping wheel 112a and the second damping wheel 112b from rotating. This will not be elaborated on here.

[0076] In one example, when setting the first damping wheel 111a and the second damping wheel 112a, the specific structural forms of the first damping surface 1111a of the first damping wheel 111a and the second damping surface 1121a of the second damping wheel 112a can also be varied.

[0077] For example, such as Figure 8 As shown, in one example provided in this application, both the first damping surface 1111a and the second damping surface 1121a are planar. Please refer to the following references. Figure 5 and Figure 8When the first damping wheel 111a and the second damping wheel 112a rotate relative to each other, the friction between the first damping surface 1111a and the second damping surface 1121a generates a damping force. In specific configurations, the magnitude of the damping force can be adjusted by adjusting the coefficient of friction between the first damping surface 1111a and the second damping surface 1121a. Alternatively, the magnitude of the damping force can also be adjusted by adjusting the elastic coefficient of the elastic element 114a or the elastic force released by the elastic element 114a.

[0078] Or, such as Figure 9 As shown, in another example provided in this application, the first damping surface 1111a has an outwardly convex inclined surface 11111a, and the second damping surface 1121a has an outwardly convex inclined surface 11211a. During the relative rotation of the first damping wheel 111a and the second damping wheel 112a, when the inclined surface 11111a of the first damping surface 1111a abuts against the inclined surface 11211a of the second damping surface 1121a, the second damping wheel 112a slides towards the elastic element 114a and overcomes the elastic force of the elastic element 114a, compressing the elastic element 114a, thereby generating a damping force.

[0079] Or, such as Figure 10 As shown, in another example provided in this application, the first damping surface 1111a includes a limiting groove 11112a, and the second damping surface 1121a also includes a limiting protrusion 11212a. When the first damping wheel 111a and the second damping wheel 112a rotate relative to each other, the limiting protrusion 11212a can slide into or out of the limiting groove 11112a. Please refer to the following references. Figure 5 and Figure 10 During the relative rotation of the first damping wheel 111a and the second damping wheel 112a, as the limiting protrusion 11212a of the first damping surface 1111a slides out of the limiting groove 11112a, the second damping wheel 112a slides towards the elastic element 114a and overcomes the elastic force of the elastic element 114a, compressing the elastic element 114a and thus generating damping force. Alternatively, it can be understood that when the limiting protrusion 11212a is located within the limiting groove 11112a, it can prevent the relative rotation of the first damping wheel 111a and the second damping wheel 112a to a certain extent, requiring a larger force to make them rotate relative to each other, thus exhibiting good limiting capability. It should be noted that in practical applications, the number of limiting protrusions 11212a and limiting grooves 11112a can be the same. Alternatively, the number of limiting protrusions 11212a can be less than the number of limiting grooves 11112a. In specific settings, the number and position of the limiting protrusions 11212a and the limiting grooves 11112a can be flexibly set according to actual needs, which will not be elaborated here.

[0080] Or, such as Figure 11 As shown, in another example provided in this application, both the first damping wheel 111a and the second damping wheel 112a are cams.

[0081] Specifically, the first damping surface 1111a is a curved surface with a protrusion 11113a and a recess 11114a. The second damping surface 1121a is also a curved surface with a protrusion 11213a and a recess 11214a. The protrusion 11113a and recess 11114a of the first damping surface 1111a can cooperate with the recess 11213a and protrusion 11214a of the second damping surface 1121a. Please refer to the following reference. Figure 5 and Figure 11 During the relative rotation of the first damping wheel 111a and the second damping wheel 112a, when the protrusion 11113a slides out of the recess 11214a and the protrusion 11213a slides out of the recess 11114a, the second damping wheel 112a slides toward the elastic element 114a and overcomes the elastic force of the elastic element 114a, causing the elastic element 114a to compress, thereby generating a damping force.

[0082] The above example only illustrates the specific structures of the first damping surface 1111a and the second damping surface 1121a. In practical applications, the first damping surface 1111a may include at least one of a plane, an inclined plane, or a curved surface. The second damping surface 1121a may include at least one of a plane, an inclined plane, or a curved surface. In specific configurations, the specific structures of the first damping surface 1111a and the second damping surface 1121a can be reasonably configured according to actual needs.

[0083] In one example, when setting up the damping assembly 11b, the structure of the first damping wheel 111b and the second damping wheel 112b in the damping assembly 11b can be set up similarly to the structure of the first damping wheel 111a and the second damping wheel 112a described above, and will not be repeated here.

[0084] The above example illustrates the damping mechanism 10 by including two damping components. In practical applications, the damping mechanism 10 may also include three or more damping components.

[0085] For example, such as Figure 12 As shown, in another example provided in this application, the damping mechanism 10 includes four damping components, namely damping component 11a, damping component 11b, damping component 11c and damping component 11d. Each damping component has a substantially identical structure.

[0086] In summary, the damping assembly 11a includes a first damping wheel 111a, a second damping wheel 112a, a central rod 113a, an elastic element 114a, a first stop 115a, and a second stop 116a. When the first damping wheel 111a and the second damping wheel 112a rotate relative to each other around the axis of the central rod 113a, a damping force is generated between the first damping wheel 111a and the second damping wheel 112a.

[0087] The damping assembly 11b includes a first damping wheel 111b, a second damping wheel 112b, a central rod 113b, an elastic element 114b, a first stop 115b, and a second stop 116b. When the first damping wheel 111b and the second damping wheel 112b rotate relative to each other around the axis of the central rod 113b, a damping force is generated between the first damping wheel 111b and the second damping wheel 112b.

[0088] The damping assembly 11c includes a first damping wheel 111c, a second damping wheel 112c, a central rod 113c, an elastic element 114c, a first stop 115c, and a second stop 116c. When the first damping wheel 111c and the second damping wheel 112c rotate relative to each other around the axis of the central rod 113c, a damping force is generated between the first damping wheel 111c and the second damping wheel 112c.

[0089] The damping assembly 11d includes a first damping wheel 111d, a second damping wheel 112d, a central rod 113d, an elastic element 114d, a first stop 115d, and a second stop 116d. When the first damping wheel 111d and the second damping wheel 112d rotate relative to each other around the axis of the central rod 113d, a damping force is generated between the first damping wheel 111d and the second damping wheel 112d.

[0090] Among them, center rods 113a, 113b, 113c, and 113d are all parallel to each other and are spaced apart along a first direction. The first direction is perpendicular to the axis of center rod 113a.

[0091] like Figure 12 As shown, the outer peripheral surface of the first damping wheel 111a has a toothed portion 1113a, the outer peripheral surface of the first damping wheel 111b has a toothed portion 1113b, the outer peripheral surface of the first damping wheel 111c has a toothed portion 1113c, and the outer peripheral surface of the first damping wheel 111d has a toothed portion 1113d. The toothed portions 1113a and 1113b mesh, 1113b and 1113c mesh, and 1113c and 1113d mesh. When an external force is applied to any one of the first damping wheels, causing it to rotate, the other three first damping wheels will also rotate accordingly.

[0092] It is understood that in the example provided in this application, synchronous rotation between two adjacent first damping wheels is achieved by providing toothed portions on the outer circumferential surface of each first damping wheel. In other examples, each first damping wheel may also be equipped with a separate gear to achieve the function of synchronous rotation. This application does not limit the type of structure for achieving the function of synchronous rotation.

[0093] In one example provided in this application, any two adjacent second damping wheels are slidably connected along the axial direction of the central rod 3, and are fixed in the axial direction perpendicular to the central rod.

[0094] Specifically, such as Figure 13 As shown, the outer peripheral surface of the second damping wheel 112a has a groove 1123a, and the outer peripheral surface of the second damping wheel 112b has a protrusion 1124b. The protrusion 1124b is inserted into the groove 1123a to achieve a sliding connection between the second damping wheel 112a and the second damping wheel 112b, and to prevent the second damping wheel 112a and the second damping wheel 112b from rotating. Correspondingly, the outer peripheral surface of the second damping wheel 112b has a groove 1123b, and the outer peripheral surface of the second damping wheel 112c has a protrusion 1124c. The protrusion 1124c is inserted into the groove 1123b to achieve a sliding connection between the second damping wheel 112b and the second damping wheel 112c, and to prevent the second damping wheel 112b and the second damping wheel 112c from rotating. Correspondingly, the outer peripheral surface of the second damping wheel 112c has a groove 1123c, and the outer peripheral surface of the second damping wheel 112d has a protrusion 1124d. The protrusion 1124d is inserted into the groove 1123c to realize the sliding connection between the second damping wheel 112c and the second damping wheel 112d, and to prevent the second damping wheel 112c and the second damping wheel 112d from rotating.

[0095] In summary, among the four second damping wheels, two adjacent second damping wheels are slidably connected, so that each second damping wheel can slide independently along the axis of its respective central rod, thereby effectively avoiding mutual interference between different second damping wheels.

[0096] Alternatively, in other examples, some of the second damping wheels may be fixedly connected.

[0097] For example, such as Figure 14 As shown, in another example provided in this application, the second damping wheel 112b and the second damping wheel 112c are an integral structure. Alternatively, in other examples, the second damping wheel 112b and the second damping wheel 112c may be manufactured separately and then fixedly connected by welding, bonding, or other methods.

[0098] The fixed connection between the second damping wheel 112b and the second damping wheel 112c effectively reduces the complexity of their structural design. For example, protrusions or grooves can be omitted between the two damping wheels, effectively reducing manufacturing costs. Furthermore, the integrated structure of the second damping wheel 112b and the second damping wheel 112c reduces the number of components in the damping mechanism 10, thereby lowering manufacturing costs and improving assembly efficiency.

[0099] By using a fixed connection, the second damping wheel 112b and the second damping wheel 112c can slide together, which can improve the design flexibility of the damping mechanism 10.

[0100] Specifically, please refer to the following: Figure 12 and Figure 14 When the second damping wheel 112b and the second damping wheel 112c are fixedly connected, the elastic forces of the elastic elements 113b and 113c are simultaneously applied to the second damping wheel 112b and the second damping wheel 112c. That is, the elastic force on the second damping wheel 112b is the sum of the elastic forces of the elastic elements 113b and 113c. Correspondingly, the elastic force on the second damping wheel 112c is the sum of the elastic forces of the elastic elements 113b and 113c. This helps to increase the damping force between the first damping wheel 111b and the second damping wheel 112b, and between the first damping wheel 111c and the second damping wheel 112c, thereby allowing for more flexible settings for the release of the damping force of the damping mechanism 10.

[0101] Understandably, in practical applications, the second damping wheel 112a can be fixedly connected to the second damping wheel 112b. Alternatively, the second damping wheel 112a can be fixedly connected to the second damping wheel 112c. Or, the second damping wheel 112a can be fixedly connected to the second damping wheel 112d. That is, the two fixedly connected second damping wheels can be adjacent or non-adjacent.

[0102] Alternatively, the second damping wheel 112a can be fixedly connected to the second damping wheel 112b, and the second damping wheel 112c can be fixedly connected to the second damping wheel 112d. Alternatively, any three second damping wheels can be fixedly connected.

[0103] In summary, in practical applications, the number of fixedly connected second damping wheels can be two or more. That is, the damping mechanism 10 may include at least two slidingly connected second damping wheels, or it may include at least two fixedly connected second damping wheels.

[0104] like Figure 14As shown, it should be noted that in the example provided in this application, the second damping wheel 112a, the second damping wheel 112b, the second damping wheel 112c, and the second damping wheel 112d are arranged sequentially along the first direction and produce a small arc. The first direction is perpendicular to the axis direction.

[0105] In summary, in practical applications, when multiple damping components are arranged sequentially along a direction perpendicular to the axis, they may or may not be located in a straight line. The specific arrangement can be flexibly configured according to actual needs, which will not be elaborated upon here.

[0106] It should be noted that the above example illustrates a damping mechanism comprising four damping components. In other examples, the damping mechanism may include two, three, or more damping components. In practical applications, the number of damping components can be appropriately set according to actual needs.

[0107] In practical applications, the aforementioned damping mechanism 10 can be used in various equipment or devices that require damping force.

[0108] For example, such as Figure 15 and Figure 16 As shown in the illustration, this application also provides a hinge 20, including a first rotating member 21, a second rotating member 22, and a damping mechanism. The first rotating member 21 is fixedly connected to a first damping wheel 111a, and the second rotating member 22 is fixedly connected to the first damping wheel 111d. Specifically, in the example provided in this application, the first rotating member 21 and the first damping wheel 111a are integrally formed, and the second rotating member 22 and the first damping wheel 111d are integrally formed, thereby effectively reducing the number of parts used. Of course, in other examples, the first rotating member 21 and the first damping wheel 111a can also be connected by welding or other methods, and the second rotating member 22 and the second damping wheel 111d can also be connected by welding or other methods; this application does not impose any limitations on this.

[0109] like Figure 15As shown, when the first rotating member 21 and the second rotating member 22 rotate under the action of an external force, the first rotating member 21 can drive the first damping wheel 111a to rotate together, and the second rotating member 22 can drive the first damping wheel 111d to rotate together. Under the sequential meshing of the toothed portions 1113a, 1113b, 1113c, and 1114c, the first damping wheels 111a, 111b, 111c, and 111d rotate simultaneously. Furthermore, the relative rotation of the first damping wheel 111a and the second damping wheel 112a generates a damping force. The relative rotation of the first damping wheel 111b and the second damping wheel 112b generates a damping force. The relative rotation of the first damping wheel 111c and the second damping wheel 112c generates a damping force. The relative rotation of the first damping wheel 111d and the second damping wheel 112d generates a damping force.

[0110] Please refer to the following: Figure 15 , Figure 16 and Figure 17 The first rotating member 21 has a connecting portion 211, and the second rotating member has a connecting portion 221. One end of the central rod 113a passes through the connecting portion 211 and is connected to the stop member 116. The other end of the central rod 113a passes through the second damping wheel 112a and the first damping wheel 111a and is connected to the stop member 115. One end of the central rod 113d passes through the connecting portion 221 and is connected to the stop member 116. The other end of the central rod 113d passes through the second damping wheel 112d and the first damping wheel 111d and is connected to the stop member 115. One end of the central rod 113b is connected to the stop member 116. The other end of the central rod 113b passes through the second damping wheel 112b and the first damping wheel 111b and is connected to the stop member 115. One end of the center rod 113c is connected to the stop 116, and the other end of the center rod 113c is connected to the stop 115 after passing through the second damping wheel 112c and the first damping wheel 111c.

[0111] Alternatively, it can be understood that you should refer to the relevant documents. Figure 15 and Figure 12 . Figure 15 The stop part 115 in the middle is equivalent to Figure 12 The stop members 115a, 115b, 115c, and 115c are included. The integrated structure effectively reduces the number of stop members required and ensures the stability of the connection between multiple center rods. Correspondingly, Figure 15 The stop 116 in the middle is equivalent to Figure 12 The stop members 116a, 116b, 116c, and 116c in the middle. The integrated structure effectively reduces the number of stop members used and ensures the connection stability between multiple center rods.

[0112] like Figure 17As shown, in Figure 15 In the example provided, the second damping wheel 112a has a groove 1123a and a protrusion 1124a, and the second damping wheel 112b has a groove 1123b and a protrusion 1124b. The protrusion 1124a is inserted into the groove 1123b, and the protrusion 1124b is inserted into the groove 1123a, thus achieving a sliding connection between the second damping wheels 112a and 112b. Correspondingly, the second damping wheel 112d has a groove 1123d and a protrusion 1124d, and the second damping wheel 112c has a groove 1123c and a protrusion 1124c. The protrusion 1124d is inserted into the groove 1123c, and the protrusion 1124c is inserted into the groove 1123d, thus achieving a sliding connection between the second damping wheels 112c and 112d.

[0113] In each of the second damping wheels, the number and shape of the protrusions and grooves can be flexibly set according to actual needs, which will not be elaborated here.

[0114] In practical applications, the aforementioned hinge 20 can be used in various electronic devices such as laptops and mobile phones that require folding or rotation.

[0115] For example, such as Figure 18 As shown, this application also provides a foldable device, specifically a mobile phone. The foldable device 30 includes a first housing 31, a second housing 32, and a flexible screen 33, and also includes... Figure 15 The two hinges 20 are shown. The two hinges 20 are fixedly connected by a connecting plate 34. For details, please refer to the relevant documentation. Figure 18 and Figure 15 One end of the connecting plate 34 (e.g.) Figure 18 The upper end of the connecting plate 34 is fixedly connected to the stop 116, and the other end of the connecting plate 34 (such as the upper end of the connecting plate 34) is fixedly connected to the stop 116. Figure 18 The lower end of the hinge 20 is fixedly connected to the stop 115. That is, the connection stability between the two hinges 20 can be effectively improved by the connecting plate 34.

[0116] In one example, the first housing 31 can be connected to the first rotating member 21, and the second housing 32 can be connected to the second rotating member 22. The first part 331 of the flexible screen 33 is connected to the first housing 31, and the second part 332 of the flexible screen 33 is fixedly connected to the second housing 32.

[0117] Specifically, in one example provided in this application, the first housing 31 has a first portion 331 and a first mounting surface 311 for mounting the flexible screen 33, and the second housing 32 has a second portion 332 and a second mounting surface 321 for mounting the flexible screen 33. In a specific configuration, the back side of the first portion 331 can be adhesively fixed to the first mounting surface 311, and the back side of the second portion 332 can be adhesively fixed to the second mounting surface 321. When the foldable device is folded or unfolded, the first housing 31 drives the first rotating member 21 to rotate synchronously, and the second housing 32 drives the second rotating member 22 to rotate synchronously, thereby achieving the closing or unfolding of the first housing 31 and the second housing 32. The first housing 31 and the first rotating member 21 can be connected in a fixed manner, or in a sliding or rotating manner. Similarly, the second housing 32 and the second rotating member 22 can be connected in a fixed manner, or in a sliding or rotating manner. In specific configurations, the first housing 31 and the first rotating member 21 can be connected in a commonly used manner, and the second housing 32 and the second rotating member 22 can be connected in a commonly used manner. This application does not impose any restrictions on this.

[0118] In the various embodiments of this application, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions of different embodiments are consistent and can be referenced by each other. The technical features of different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0119] In this application, "multiple" means two or more. "And / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, or B exists alone, where A and B can be singular or plural.

[0120] It is understood that the various numerical designations used in the embodiments of this application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application. The order of the process numbers described above does not imply the order of execution; the execution order of each process should be determined by its function and internal logic.

Claims

1. A damping mechanism, characterized in that, It includes multiple damping components, each of which includes a first damping wheel, a second damping wheel, a central rod, and an elastic element; The first damping wheel is connected to the central rod, and the second damping wheel is connected to the central rod; wherein the first damping wheel and the second damping wheel can rotate relative to each other around the central rod, and the second damping wheel can move relative to the first damping wheel along the axial direction of the central rod; The first damping wheel has a first damping surface, and the second damping wheel has a second damping surface, with the first damping surface and the second damping surface arranged opposite to each other; The elastic element is connected to the second damping wheel, and the elastic element is used to apply a force to the second damping wheel along the axial direction of the central rod, so that the first damping surface contacts the second damping surface; In the plurality of damping components, the central rods of each damping component are parallel to each other, and at least two second damping wheels are slidably connected along the axial direction of the central rod and fixed in a direction perpendicular to the axial direction of the central rod.

2. The damping mechanism according to claim 1, characterized in that, The plurality of damping components are spaced apart along an axis perpendicular to the center rod; At least two adjacent second damping wheels are slidably connected along the axial direction of the central rod and fixed in a direction perpendicular to the axial direction of the central rod.

3. The damping mechanism according to claim 1 or 2, characterized in that, Among the plurality of damping components, at least two fixedly connected second damping wheels are also included.

4. The damping mechanism according to any one of claims 1 to 3, characterized in that, In two second damping wheels that are slidably connected along the axial direction of the central rod and fixed to each other in a direction perpendicular to the axial direction of the central rod, one of the second damping wheels has a groove on its outer peripheral surface, and the other second damping wheel has a protrusion on its outer peripheral surface, the protrusion being inserted into the groove.

5. The damping mechanism according to any one of claims 1 to 4, characterized in that, The first damping surface includes at least one of a plane, an inclined plane, or a curved surface; The second damping surface includes at least one of a plane, an inclined plane, or a curved surface.

6. The damping mechanism according to any one of claims 1 to 5, characterized in that, The first damping surface further includes a limiting groove, and the second damping surface further includes a limiting protrusion. When the first damping wheel and the second damping wheel rotate relative to each other, the limiting protrusion can slide into or out of the limiting groove.

7. The damping mechanism according to any one of claims 1 to 6, characterized in that, In the plurality of damping assemblies, each of the elastic elements has the same elastic coefficient; or, the plurality of damping assemblies includes at least two elastic elements with different elastic coefficients.

8. The damping mechanism according to any one of claims 1 to 7, characterized in that, Each of the damping components further includes a first stop and a second stop; In any of the damping components, the center rod passes through the first stop and the second stop, and the center rod is fixed to the first stop and the second stop in the axial direction of the center rod; The first stop is located on the side of the first damping wheel opposite to the second stop, and the first stop abuts against the first damping wheel; The second stop is located on the side of the second damping wheel opposite to the first damping wheel; The elastic element is located between the second damping wheel and the second stop, with one end of the elastic element abutting against the second damping wheel and the other end of the elastic element abutting against the second stop.

9. The damping mechanism according to claim 8, characterized in that, In any of the damping components, the central rod is rotatable about the axis relative to the first stop, and the plurality of first stops are fixedly connected to each other; In any of the damping components, the central rod is rotatable about the axis relative to the second stop, and the plurality of second stops are fixedly connected together.

10. The damping mechanism according to any one of claims 1 to 9, characterized in that, The outer peripheral surface of each of the first damping wheels also includes a toothed portion; In the plurality of damping components, the teeth of two adjacent first damping wheels mesh with each other.

11. A hinge, characterized in that, It includes a first rotating member, a second rotating member, and a damping mechanism as described in any one of claims 1 to 10; The plurality of damping components are arranged sequentially along a first direction, which is perpendicular to the axis of the central rod; The first rotating component and the second rotating component are respectively fixedly connected to the two outermost first damping wheels.

12. A foldable device, characterized in that, It includes a first housing, a second housing, and a flexible screen, and also includes the hinge as described in claim 11; The first housing is connected to the first rotating component, and the second housing is connected to the second rotating component; The first part of the flexible screen is connected to the first housing, and the second part of the flexible screen is fixedly connected to the second housing.

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