Rotating shaft assembly and electronic device

Abstract

The application provides a rotating shaft assembly and an electronic device, wherein the rotating shaft assembly comprises a support, a connecting rod and a distal damping module; the support is provided with a sliding groove; the edge of the connecting rod is slidably embedded in the sliding groove; the distal damping module is arranged between the support and the connecting rod, one end of the distal damping module is connected to the connecting rod, and the other end of the distal damping module is connected to the support; the distal damping module is extruded by the support to generate a reaction force on the support, so that the side wall of the sliding groove and the connecting rod abut; the direction of the reaction force is perpendicular to the cooperation interface between the inner side wall of the sliding groove and the connecting rod. By arranging the distal damping module between the connecting rod and the support, the direction of the reaction force generated by the distal damping module after being extruded can be only perpendicular to the cooperation interface between the connecting rod and the sliding groove, so that the reaction force is entirely contributed to the friction force between the support and the connecting rod, the damping effect between the support and the connecting rod is effectively improved, and meanwhile, the Z-direction space can be saved, thereby being beneficial to the lightness and thinness of the electronic device.

Description

Technical Field

[0001] This application relates to the field of electronic equipment technology, and more particularly to a rotating shaft assembly and an electronic device. Background Technology

[0002] With the development of flexible screen technology, foldable phones based on flexible screens have become an emerging technological innovation point in the industry. In existing foldable phone designs, the opening and closing force is changed by adjusting the cam curve of the damping module to achieve free hovering. However, this method has a limited hovering angle. If a larger hovering angle is required, the cam curve needs to be adjusted, which will result in a larger cam design size, occupying more space inside the hinge, and failing to achieve a thinner and lighter overall design. Summary of the Invention

[0003] The purpose of this application is to provide a pivot assembly and electronic device to solve the problem in the prior art where adjusting the opening and closing force by adjusting the cam curve results in a larger cam design size, which occupies internal space of the pivot and fails to achieve a thinner and lighter overall device.

[0004] A first aspect of this application provides a pivot assembly, comprising:

[0005] The bracket is provided with a sliding groove;

[0006] A connecting rod, the edge of which is slidably embedded in the groove;

[0007] A distal damping module is disposed between the bracket and the connecting rod, with one end of the distal damping module connected to the connecting rod and the other end of the distal damping module connected to the bracket.

[0008] The distal damping module generates a reaction force on the bracket due to the compression of the bracket, causing the sidewall of the slide to abut against the connecting rod; the direction of the reaction force is perpendicular to the mating interface between the inner sidewall of the slide and the connecting rod.

[0009] The hinge assembly provided in this application, by setting a distal damping module between the connecting rod and the bracket, can, on the one hand, ensure that the direction of the reaction force generated by the distal damping module after being compressed is only perpendicular to the mating interface between the connecting rod and the slide, so that the entire reaction force contributes to the friction between the bracket and the connecting rod, effectively improving the damping effect between the bracket and the connecting rod. On the other hand, it can utilize the existing space between the connecting rod and the bracket for arrangement, without occupying additional Z-axis space, thus contributing to the thinner and lighter design of the hinge assembly and electronic equipment.

[0010] In one possible design, the connecting rod is provided with a groove, and the distal damping module is at least partially disposed in the groove.

[0011] By creating a groove on the connecting rod, at least part of the distal damping module is placed within the groove. This avoids the distal damping module occupying additional Z-axis space in the connecting rod and the support, thus achieving both damping effect on the relative movement of the support and the connecting rod, and also facilitating the thinning and lightening of the shaft assembly and electronic equipment.

[0012] In one possible design, the distal damping module includes a support shaft, a torsion spring, and a first pressure block; the support shaft is mounted on the connecting rod; the torsion spring is sleeved on the support shaft, and one end of the torsion spring has a free end; the end of the first pressure block facing the bracket abuts against the bracket, and the end of the first pressure block away from the bracket abuts against the end of the free end facing the bracket, and there is a gap between the end of the free end away from the bracket and the connecting rod.

[0013] The torsion spring has a helical structure and can be sleeved on a support shaft, which provides support. One end of the torsion spring can be fixed to the support shaft, while the other end is free. When a force is applied to this free end radially, the free end, which is away from the support, has a gap with the connecting rod, allowing it to deform within this gap. This causes the torsion spring to undergo elastic deformation, generating elastic force. In this embodiment, the first pressure block can be compressed by the support and the connecting rod, applying pressure to the free end of the torsion spring radially. This pressure is directed towards the side where the connecting rod is located. Simultaneously, the torsion spring undergoes elastic deformation under pressure and generates a reverse reaction force on the first pressure block through its free end. The direction of this reaction force is perpendicular to the interface between the connecting rod and the slide, thus allowing the entire reaction force to contribute to the damping effect between the connecting rod and the slide.

[0014] In one possible design, there are two support shafts, and the torsion spring includes a first part and a second part. The first part is sleeved on one support shaft, and the second part is sleeved on the other support shaft. The first end of the first part is connected to the first end of the second part, and both the second end of the first part and the second end of the second part are provided with free ends.

[0015] Both the first and second parts are spiral-shaped and can be arranged in parallel. The first end of each part can be the end furthest from the first pressure block, and the connection between these ends should maintain a relatively stable state; that is, the two ends connected to the first and second parts should not deform, or should only undergo slight deformation that can be ignored. The second end of both parts has a free end that interacts with the first pressure block. This free end can undergo significant elastic deformation under pressure, causing the torsion spring to generate elastic force, which can then react onto the first pressure block.

[0016] It should be noted that there can be symmetrically arranged slides on the bracket to ensure the smoothness of the sliding of the connecting rod relative to the bracket. Through the cooperation of the first part and the second part, both slides can reliably abut against the connecting rod, so that the damping effect generated at the two slides is basically the same. This can ensure that the rotating shaft assembly has a good damping effect and ensure the stability of the relative sliding of the connecting rod and the bracket.

[0017] In one possible design, the first pressure block includes a roller with protrusions at both ends in the axial direction, each protrusion abutting against a corresponding free end.

[0018] When the connecting rod slides relative to the bracket, the roller can roll relative to the bracket, allowing for smooth sliding between the connecting rod and the bracket. In other words, no damping force is needed between the roller and the bracket; only the interface between the connecting rod and the slide groove requires damping force. Therefore, the magnitude of the damping force can be controlled by adjusting the coefficient of friction and the normal force at the interface, facilitating adjustment and control to meet the overall machine requirements without needing to adjust and match damping forces at multiple points separately. Furthermore, the two protrusions can be symmetrically positioned on both sides of the roller, ensuring that the pressure exerted by the protrusions on the free end is consistent. This guarantees that the first and second parts of the torsion spring undergo consistent elastic deformation, ensuring stable and consistent force direction and magnitude.

[0019] In one possible design, the bracket is provided with a first slide rail, and the rollers are rotatably abutted against the bottom surface of the first slide rail.

[0020] The first slide can be a groove-shaped structure, and the roller can be at least partially set in the first slide, so that the first slide can provide guidance for the roller and ensure the stability of the relative movement of the connecting rod and the bracket.

[0021] In one possible design, the bottom surface of the first slide is a plane, or at least partially a curved surface.

[0022] When the bottom surface is flat, when the roller contacts any position on the flat surface, the connecting rod and the slide are subjected to a stable and consistent normal force. In other words, the damping force felt by the user is the same during the gradual opening or closing process of the main frame and the secondary frame.

[0023] When at least a portion of the bottom surface is curved, the curved surface arches towards the distal damping module, providing a relatively large normal pressure to the distal damping module. This results in a larger damping force between the connecting rod and the slide rail. Conversely, when the portion of the first slide rail outside the curved surface abuts against the distal damping module, the normal pressure on the distal damping module is relatively small, resulting in a relatively smaller damping force between the connecting rod and the slide rail. Utilizing this principle, the curved surface in the first slide rail can be positioned where the main and secondary middle frames require a larger damping force, while the portion outside the curved surface, such as a flat surface, can be positioned where the main and secondary middle frames require a smaller damping force, such as the position where the rollers contact the first slide rail when the main and secondary middle frames are about to fully open. Therefore, by setting the curved surface, different damping forces can be automatically matched according to the actual opening and closing force requirements of the entire machine, improving the user experience.

[0024] In one possible design, the distal damping module includes a disc spring and a second pressure block, with one recessed end of the disc spring mounted on the connecting rod and the other arched end connected to the second pressure block; the end of the second pressure block opposite to the disc spring abuts against the bracket.

[0025] The disc spring has a recessed end that can be mounted on the connecting rod and an arched end that can be connected to the second pressure block. The bracket can be pressed on the second pressure block and can cause the disc spring to elastically deform towards the recessed side through the second pressure block. The disc spring can generate a reaction force on the connecting rod and the bracket, so that the connecting rod and the slide can reliably abut against each other, and a damping force is generated between the connecting rod and the slide.

[0026] In one possible design, the second pressure block is a ball bearing. When the connecting rod and the bracket slide relative to each other, the ball bearing can roll, thus facilitating the sliding of the connecting rod and the bracket. That is, in this embodiment, there may be no damping force between the ball bearing and the bracket, or the damping force between the ball bearing and the bracket may be negligible; only damping force is needed between the connecting rod and the slide groove, thereby facilitating the control and adjustment of the damping force.

[0027] In one possible design, the arched end of the disc spring is provided with a positioning groove, and the ball is disposed in the positioning groove.

[0028] The positioning groove is designed to position the ball bearing and prevent it from falling out. The ball bearing can be placed in or adhered to the positioning groove. Furthermore, the positioning groove is arc-shaped, with its inner surface being a concave spherical surface, which allows for constraint of the ball bearing in all directions, preventing it from detaching from the positioning groove.

[0029] In one possible design, the connecting rod is provided with a positioning protrusion, the disc spring is provided with a positioning hole, and the disc spring is sleeved on the positioning protrusion through the positioning hole.

[0030] The positioning protrusion protrudes to the side where the bracket is located. During installation, the positioning protrusion can pass through the positioning hole on the disc spring to position the disc spring and ensure its stability.

[0031] In one possible design, the support includes a second slide, and the ball reliably abuts against the bottom surface of the second slide.

[0032] The second slide includes two inner wall surfaces and a bottom surface, which together form a U-shaped groove structure. At least a portion of the ball is disposed within the second slide. The two side walls of the second slide can guide the relative movement of the ball, ensuring the stability of the relative movement between the connecting rod and the support. The bottom surface of the second slide can provide positive pressure for the ball.

[0033] In one possible design, the bottom surface of the second slide is a flat surface, or at least a partially curved surface.

[0034] When the bottom surface of the second slide is a plane, when the ball contacts any position on the plane, the connecting rod and the slide are subjected to a stable and consistent normal force. In other words, the damping force felt by the user is the same during the gradual opening or closing process of the main frame and the secondary frame.

[0035] When the bottom surface of the second slide is curved, the curved surface arches towards the distal damping module, providing a relatively large normal pressure to the distal damping module. This results in a larger damping force between the connecting rod and the slide groove. Conversely, when the portion of the second slide rail outside the curved surface contacts the distal damping module, the normal pressure on the distal damping module is relatively small, resulting in a relatively smaller damping force between the connecting rod and the slide groove. Utilizing this principle, the curved surface in the second slide rail can be positioned where the main and secondary middle frames require a larger damping force, while the portion outside the curved surface, such as a flat surface, can be positioned where the main and secondary middle frames require a smaller damping force, such as the position where the balls contact the second slide rail when the main and secondary middle frames are about to fully open. Therefore, by setting the curved surface, different damping forces can be automatically matched according to the actual opening and closing force requirements of the entire machine, improving the user experience.

[0036] A second aspect of this application also provides an electronic device including a mid-frame, wherein the electronic device further includes a hinge assembly provided in the first aspect of this application, the hinge assembly being connected to the mid-frame via the bracket.

[0037] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of an existing cam structure;

[0039] Figure 2 A schematic diagram of the structure of the electronic device provided in this application;

[0040] Figure 3 This is a schematic diagram of the structure of a rotating shaft assembly provided in one embodiment of this application;

[0041] Figure 4 This is a schematic diagram of the structure of a rotating shaft assembly (hidden bracket) provided in one embodiment of this application;

[0042] Figure 5 This is a schematic diagram of the connecting rod in a rotating shaft assembly provided in one embodiment of this application;

[0043] Figure 6 This is a schematic diagram of the structure of the distal damping module in a rotating shaft assembly provided in one embodiment of this application;

[0044] Figure 7 This is a schematic diagram of the structure of the bracket in a rotating shaft assembly provided in one embodiment of this application;

[0045] Figure 8 This is a schematic diagram of the structure of a rotating shaft assembly provided in another embodiment of this application;

[0046] Figure 9 A schematic diagram of the structure of a rotating shaft assembly (hidden bracket) provided in another embodiment of this application;

[0047] Figure 10 This is a schematic diagram of the connecting rod in a rotating shaft assembly provided in another embodiment of this application;

[0048] Figure 11 A schematic diagram of the structure of the distal damping module in a rotating shaft assembly provided in another embodiment of this application;

[0049] Figure 12 This is a schematic diagram of the structure of the bracket in the rotating shaft assembly provided in another embodiment of this application;

[0050] Figure 13 This is a schematic diagram of a disc spring.

[0051] Figure label:

[0052] 100-Second transmission component

[0053] 101-Cam

[0054] 101a-Side View

[0055] 10-Electronic Devices

[0056] 10a-Main Frame

[0057] 10b-Secondary Midframe

[0058] 10c-Spindle Assembly

[0059] 1-Standard

[0060] 11-First Slide

[0061] 111-Bottom

[0062] 111a-Arc Surface

[0063] 12-Second Slide

[0064] 13-Slide

[0065] 2-link

[0066] 21-groove

[0067] 22-groove

[0068] 23-Positioning protrusion

[0069] 3a-Remote Damping Module

[0070] 3a1-Support Shaft

[0071] 3a2-Torsion Spring

[0072] 3a21-Free End

[0073] 3a22-Part 1

[0074] 3a23 - Part Two

[0075] 3a3-First Press Block

[0076] 3a31-roller

[0077] 3a32-protrusion

[0078] 3b-Remote Damping Module

[0079] 3b1-Disc Spring

[0080] 3b11-Positioning Groove

[0081] 3b12-Positioning Hole

[0082] 3b2 - Second pressing block.

[0083] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Detailed Implementation

[0084] To better understand the technical solutions of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0085] In the description of this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; unless otherwise specified or explained, the term "multiple" refers to two or more; the terms "connected," "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0086] Existing foldable phone designs typically include a main frame, a sub-frame, a hinge assembly, and a flexible screen. The main frame and the sub-frame are connected by a hinge assembly, and the flexible screen covers the main frame and the sub-frame. When the main frame and the sub-frame rotate relative to each other, the flexible screen can bend or flatten accordingly using its own flexibility.

[0087] During the rotation of the main and secondary frames, when they do not need to be fully flattened or fully folded, they need to be able to hover and maintain a certain angle. This requires damping force within the pivot assembly to limit the overall opening and closing force. Traditional folding machines typically adjust this damping force by designing a cam curve.

[0088] Figure 1 Here is a schematic diagram of an existing cam, such as Figure 1 As shown, the existing cam 101 is part of a transmission component, and is approximately a toothed structure protruding from the end of the transmission component. Multiple such cams 101 can be present at one end of the transmission component, so that the end of the transmission component forms the crest formed by the cams and the trough formed between two cams.

[0089] To achieve relative rotation between the main frame and the secondary frame, the pivot assembly typically includes a stationary first transmission component and a second transmission component 100 that rotates relative to the first transmission component, such as... Figure 1 As shown, both the first transmission member and the second transmission member 100 have the aforementioned cam 101, so that the first transmission member and the second transmission member 100 cooperate with each other through their respective cams.

[0090] Specifically, both the first and second transmission components 100 can be mounted on the same rotating shaft, meaning they are axially coupled. When the second transmission component 100 rotates relative to the first transmission component, the cams on the two components remain in contact. Furthermore, with the relative rotation of the two components, the first and second transmission components 100 will exhibit alternating patterns of crest-to-crest and crest-to-trough engagement. For example... Figure 1 As shown, when the sides 101a of the cams 101 of the two transmission components are in contact with each other and slide relative to each other, friction exists at the mating interface of the two cams 101. It should be noted that the side 101a of the cam 101 is an inclined plane, that is, there is a certain angle between the side 101a and the axis of the transmission component. When the force from the axial direction of the transmission component acts on the side 101a of the cam 101, a component force perpendicular to the side 101a will be generated. This component force can generate friction between the two mating cams 101 to achieve a damping effect, and at the same time generate a driving force, which is conducive to the relative rotation of the two transmission components.

[0091] In other words, the axial force from the transmission component cannot contribute entirely to the damping effect; a portion of the force is still needed to drive the transmission component's rotation, thus weakening the damping effect. If the ratio between the damping force and the driving force needs to be adjusted, the cam curve is typically modified. This involves changing parameters such as the tilt angle and length of the side surface 101a of the cam 101 to alter the magnitude of each component force. Simultaneously, the overall dimensions of the cam, such as its length and thickness, must be considered to ensure they allow for adjustments to the parameters of the cam side surface 101a. Changing the parameters of the cam 101 also affects the overall fit design of the shaft assembly, making the design complex and difficult to modify once the cam 101 is manufactured. Furthermore, achieving a larger hovering angle and damping effect requires increasing the cam size to accommodate the cam curve design, which inevitably leads to occupying more space within the shaft assembly, hindering the overall slim and lightweight design.

[0092] like Figure 2 As shown, this application embodiment provides an electronic device 10 and a hinge assembly 10c, which is applied to the electronic device. The electronic device can be a foldable device such as a foldable phone or a laptop. This embodiment preferably uses a foldable phone as an example for explanation.

[0093] The electronic device may include a mid-frame that can support a flexible screen, and a hinge assembly including a bracket 1 that can be connected to the mid-frame via the bracket 1. Specifically, the mid-frame may include a main mid-frame 10a and a secondary mid-frame 10b, which can rotate via the hinge assembly, thereby enabling the electronic device to be folded or flattened.

[0094] Among them, such as Figure 3 , Figure 5 , Figure 8 and Figure 10 As shown, the pivot assembly 10c also includes a connecting rod 2 and distal damping modules 3a and 3b. The bracket 1 is provided with a slide groove 13, and the edge of the connecting rod 2 is slidably embedded in the slide groove 13. The cross-section of the slide groove 13 can be "U" shaped, and the connecting rod 2 slides relative to the bracket 1 through the slide groove 13.

[0095] Distal damping modules 3a and 3b are disposed between the bracket 1 and the connecting rod 2, with one end of each module connected to the connecting rod 2 and the other end connected to the bracket 1. These distal damping modules 3a and 3b are positioned relatively far from the cam, allowing them to independently achieve a damping effect. The distal damping modules 3a and 3b can generate a reaction force on the bracket 1 when compressed by the bracket 1, causing the inner wall of the slide groove 13 to abut against the connecting rod 2. The direction of the reaction force is perpendicular to the interface between the side wall of the slide groove 13 and the connecting rod 2.

[0096] The distal damping modules 3a and 3b are elastic and can undergo elastic deformation under pressure. This allows them to generate a reaction force on the support 1 and connecting rod 2 when compressed by them, increasing the frictional resistance between the inner wall of the slide groove 13 and the connecting rod 2, thus improving the damping effect between the support 1 and the connecting rod 2. Furthermore, the distal damping modules 3a and 3b are positioned between the support 1 and the connecting rod 2, and their forces on the support 1 and connecting rod 2 are in opposite directions, causing the connecting rod 2 to abut against the inner wall of the slide groove 13 on the side furthest from the distal damping modules 3a and 3b.

[0097] It is important to emphasize that the direction of the reaction force generated by the distal damping modules 3a and 3b after being compressed is perpendicular to the interface between the inner wall of the slide groove 13 and the connecting rod 2. The interface between the inner wall of the slide groove 13 and the connecting rod 2 refers to the surface where the connecting rod 2 contacts the slide groove 13. Sliding friction can be generated on this interface. In this embodiment, by setting the distal damping modules 3a and 3b between the connecting rod 2 and the bracket 1, the direction of the reaction force generated by the distal damping modules 3a and 3b after being compressed is perpendicular only to this interface. According to the friction calculation formula f = μN, where f is the sliding friction force, μ is the coefficient of kinetic friction, and N is the normal force of the working surface, the reaction force generated by the distal damping modules 3a and 3b after being compressed can be entirely contributed to the friction force without loss of friction force due to the generation of components in other directions.

[0098] Therefore, by setting up distal damping modules 3a and 3b, this embodiment ensures that the direction of the reaction force generated by the distal damping modules 3a and 3b after being compressed is only perpendicular to the mating interface. This allows the entire reaction force to contribute to the friction between the support 1 and the connecting rod 2, effectively improving the damping effect between the support 1 and the connecting rod 2. Furthermore, the distal damping modules 3a and 3b can be arranged using the existing space between the connecting rod 2 and the support 1, without occupying additional Z-axis space, thus contributing to the thinner and lighter design of the pivot assembly and electronic equipment.

[0099] As a specific implementation method, such as Figure 3 , Figure 4 , Figure 8 and Figure 9 As shown, grooves 21 and 22 may be provided on the connecting rod 2, and the distal damping modules 3a and 3b are at least partially provided in the grooves 21 and 22.

[0100] The portion of the connecting rod 2 that slides with the bracket 1 can be a flat plate structure with a certain thickness. Grooves 21 and 22 can be provided on the flat plate structure. In other words, by opening grooves 21 and 22 on the connecting rod 2, at least a portion of the distal damping modules 3a and 3b can be provided in the grooves 21 and 22. This avoids the distal damping modules 3a and 3b occupying additional Z-axis space of the connecting rod 2 and the bracket 1, thereby achieving both damping effect on the relative movement of the bracket 1 and the connecting rod 2 and facilitating the thinning of the rotating shaft assembly and electronic equipment.

[0101] Of course, holes can also be provided on the connecting rod 2, so that the distal damping modules 3a and 3b are at least partially disposed in the holes. Alternatively, holes and grooves can be provided on the connecting rod 2 simultaneously, with the holes and grooves fitting together to accommodate the distal damping modules 3a and 3b.

[0102] In a specific implementation, such as Figures 2 to 5 As shown, the distal damping module 3a may include a support shaft 3a1, a torsion spring 3a2, and a first pressure block 3a3. This distal damping module 3a can be disposed as follows: Figure 4 and Figure 5 The groove 21 shown is in the support shaft 3a1, which is mounted on the connecting rod 2. The torsion spring 3a2 is sleeved on the support shaft 3a1. One end of the torsion spring 3a2 is provided with a free end 3a21. The end of the first pressure block 3a3 facing the bracket 1 abuts against the bracket 1. The end of the first pressure block 3a3 away from the bracket 1 abuts against the end of the free end 3a21 facing the bracket 1. There is a gap between the end of the free end 3a21 away from the bracket 1 and the connecting rod 2.

[0103] It is understandable that, such as Figure 5As shown, the torsion spring 3a2 has a helical structure and can be sleeved on the support shaft 3a1. The support shaft 3a1 can provide support. One end of the torsion spring 3a2 can be fixed relative to the support shaft 3a1, while the other end of the torsion spring 3a2 is formed as a free end 3a21. When a force is applied to the free end 3a21 in the radial direction of the torsion spring 3a2, since there is a gap between the end of the free end 3a21 away from the bracket 1 and the connecting rod 2, the free end 3a21 can be deformed in the gap, thereby causing the torsion spring 3a2 to undergo elastic deformation and generate elastic force. In this embodiment, the first pressure block 3a3 can be squeezed by the bracket 1 and the connecting rod 2 to apply pressure to the free end 3a21 of the torsion spring 3a2 in the radial direction along the torsion spring 3a2. The direction of the pressure is towards the side where the connecting rod 2 is located. At the same time, the torsion spring 3a2 undergoes elastic deformation after being compressed, and can generate a reverse reaction force on the first pressure block 3a3 through its free end 3a21. The direction of the reaction force is perpendicular to the mating interface between the connecting rod 2 and the slide groove 13, so that the reaction force can be fully contributed to the damping effect between the connecting rod 2 and the slide groove 13.

[0104] Specifically, such as Figure 5 As shown, there are two support shafts 3a1. The torsion spring 3a2 includes a first part 3a22 and a second part 3a23. The first part 3a22 is sleeved on one support shaft 3a1, and the second part 3a23 is sleeved on the other support shaft 3a1. The first end of the first part 3a22 is connected to the first end of the second part 3a23. The second end of the first part 3a22 and the second end of the second part 3a23 are both provided with a free end 3a21.

[0105] Among them, such as Figure 5 As shown, both the first part 3a22 and the second part 3a23 are spiral-shaped and can be arranged in parallel. The first end of the first part 3a22 and the first end of the second part 3a23 can both be the end furthest from the first pressure block 3a3. After the first ends of the first parts 3a22 and 3a23 are connected, they maintain a relatively stable state; that is, the two ends connected to the first parts 3a22 and 3a23 will not deform, or will only undergo slight deformation, which can be ignored. The second ends of both the first part 3a22 and 3a23 have free ends 3a21 that interact with the first pressure block 3a3. These free ends 3a21 can undergo significant elastic deformation under pressure, causing the torsion spring 3a2 to generate elastic force, which can then react onto the first pressure block 3a3.

[0106] It should be noted that, as Figure 2As shown, there are symmetrically arranged slide grooves 13 on the bracket 1 to ensure the smooth sliding of the connecting rod 2 relative to the bracket 1. Through the cooperation of the first part 3a22 and the second part, both slide grooves 13 can reliably abut against the connecting rod 2, so that the damping effect generated at the two slide grooves 13 is basically the same. This ensures that the rotating shaft assembly has a good damping effect and also ensures the stability of the relative sliding of the connecting rod 2 and the bracket 1.

[0107] Specifically, the first pressing block 3a3 includes a roller 3a31, and the roller 3a31 has protrusions 3a32 at both ends in the axial direction, and each protrusion 3a32 abuts against a corresponding free end 3a21.

[0108] like Figure 5 As shown, when the connecting rod 2 slides relative to the bracket 1, the roller 3a31 can roll relative to the bracket 1, thus enabling smooth sliding between the connecting rod 2 and the bracket 1. In other words, no damping force is required between the roller 3a31 and the bracket 1; only the interface between the connecting rod 2 and the slide groove 13 needs to generate damping force. Therefore, the magnitude of the damping force can be controlled by adjusting the coefficient of friction and the normal force at the interface between the connecting rod 2 and the slide groove 13, facilitating the adjustment and control of the damping force to meet the needs of the entire machine, without the need for separate adjustment and matching of damping forces at multiple locations. Furthermore, the two protrusions 3a32 can be symmetrically arranged on both sides of the roller 3a31, ensuring that the pressure exerted by the protrusions 3a32 on the free end 3a21 is consistent. This ensures that the first part 3a22 and the second part of the torsion spring 3a2 undergo consistent elastic deformation, guaranteeing stable and consistent force direction and magnitude.

[0109] Specifically, such as Figure 6 As shown, the bracket 1 is provided with a first slide rail 11, and the roller 3a31 can roll and abut against the bottom surface of the first slide rail 11.

[0110] The first slide rail 11 can be a groove-shaped structure, and the roller 3a31 can be at least partially disposed in the first slide rail 11, so that the first slide rail 11 can provide guidance for the roller 3a31 and ensure the stability of the relative movement of the connecting rod 2 and the bracket 1.

[0111] Among them, such as Figure 6As shown, the bottom surface 111 of the first slide rail 11 is a plane, or at least partially an arc-shaped surface 111a. The first slide rail 11 includes two inner wall surfaces and a bottom surface 111, which together form a "U"-shaped structure. The two inner wall surfaces can be used to restrict the two end faces of the roller 3a31 in the axial direction, preventing the roller 3a31 from wobbling in the axial direction. The bottom surface 111 of the first slide rail 11 is the side surface that contacts the side of the roller 3a31. In one embodiment, the bottom surface 111 can be a plane. When the roller 3a31 contacts any position on the plane, the connecting rod 2 and the slide groove 13 are subjected to a stable and consistent positive pressure. That is, during the gradual opening or closing process of the main frame 10a and the secondary frame 10b, the damping force felt by the user is the same.

[0112] However, the actual damping force required by the main middle frame 10a and the secondary middle frame 10b during the entire opening or closing process is different. For example, when the main middle frame 10a and the secondary middle frame 10b are in the open and flattened state, the opening angle is 180°. When the main middle frame 10a and the secondary middle frame 10b are in the closed state, the opening angle is 0°. However, when the main middle frame 10a and the secondary middle frame 10b are about to be fully opened, such as when the opening angle is 160° to 175°, the main middle frame 10a and the secondary middle frame 10b need to be able to open quickly within the angle range of 5° to 20° before being fully opened, which can be done without damping force. However, when the bottom surface 111 of the first slide rail 11 is a plane, it can only provide a stable and consistent damping force, making it difficult to achieve rapid rotation and opening of the main middle frame 10a and the secondary middle frame 10b.

[0113] Therefore, in another embodiment, such as Figure 6 As shown, the bottom surface 111 of the first slide rail 11 is at least partially an arc-shaped surface 111a. This arc-shaped surface 111a arches towards one side of the distal damping module 3a, which can provide a relatively large positive pressure to the distal damping module 3a. This allows the connecting rod 2 to have a large damping force between it and the slide groove 13. When the part of the first slide rail 11 located outside the arc-shaped surface 111a abuts against the distal damping module 3a, the positive pressure on the distal damping module 3a is relatively small, which allows the connecting rod 2 to have a relatively small damping force between it and the slide groove 13. Using this principle, the arc-shaped surface 111a in the first slide rail 11 can be set at a position where the main middle frame 10a and the secondary middle frame 10b require a large damping force, while the part other than the arc-shaped surface 111a, such as the flat surface, can be set at a position where the main middle frame 10a and the secondary middle frame 10b require a small damping force, such as the position where the roller 3a31 contacts the first slide rail 11 when the main middle frame 10a and the secondary middle frame 10b are about to be fully opened.

[0114] Therefore, by setting the arc surface 111a, different damping forces can be automatically matched according to the actual needs of the machine for opening and closing force, which can improve the user experience.

[0115] In another specific implementation, such as Figures 7 to 12 As shown, the remote damping module 3b includes a disc spring 3b1 and a second pressure block 3b2. The recessed end of the disc spring 3b1 is installed on the connecting rod 2, and the arched end of the disc spring 3b1 is connected to the second pressure block 3b2. The end of the second pressure block 3b2 facing away from the disc spring 3b1 abuts against the bracket 1.

[0116] It is understandable that, such as Figure 12 As shown, the disc spring 3b1 has a concave structure at one end in the axial direction and an arched structure at the other end. When pressure is applied to the arched end, the disc spring 3b1 elastically deforms towards the concave side and generates a reaction force on the pressure side. In this embodiment, the concave end of the disc spring 3b1 can be mounted on the connecting rod 2, and the arched end can be connected to the second pressure block 3b2. The bracket 1 can press on the second pressure block 3b2 and can cause the disc spring 3b1 to elastically deform towards the concave side through the second pressure block 3b2. The disc spring 3b1 can generate a reaction force on the connecting rod 2 and the bracket 1, so that the connecting rod 2 and the slide groove 13 can reliably abut against each other, and a damping force is generated between the connecting rod 2 and the slide groove 13.

[0117] Among them, such as Figure 8 and Figure 9 As shown, a groove 22 can be provided on the connecting rod 2, and the disc spring 3b1 can be provided in the groove 22, so that at least a part of the second pressure block 3b2 protrudes from the groove 22 so as to contact the bracket 1. This eliminates the need to occupy additional Z-axis space, which is the space perpendicular to the relative sliding direction of the connecting rod 2 and the bracket 1, thereby facilitating the thinning of the rotating shaft assembly and electronic equipment.

[0118] Specifically, such as Figure 10 As shown, the second pressure block 3b2 is a ball bearing. It can be understood that this ball bearing is a sphere, and when the connecting rod 2 and the bracket 1 slide relative to each other, the ball bearing can roll, thus facilitating the sliding of the connecting rod 2 and the bracket 1. That is to say, in this embodiment, there may be no damping force between the ball bearing and the bracket 1, or the damping force between the ball bearing and the bracket 1 can be negligible; only a damping force is needed between the connecting rod 2 and the slide groove 13, thereby facilitating the control and adjustment of the damping force.

[0119] Specifically, such as Figure 12As shown, a positioning groove 3b11 is provided at the arched end of the disc spring 3b1, and the ball is positioned in the positioning groove 3b11. This positioning groove 3b11 can position the ball and prevent it from falling out. The ball can be placed in the positioning groove 3b11 or glued to it. Furthermore, the positioning groove 3b11 is an arc-shaped groove, meaning its inner surface is a concave spherical surface, which allows the ball to be constrained in all directions, preventing it from detaching from the positioning groove 3b11.

[0120] Specifically, such as Figures 8 to 10 As shown, the connecting rod 2 is provided with a positioning protrusion 23, and the disc spring 3b1 is provided with a positioning hole 3b12. The disc spring 3b1 is sleeved on the positioning protrusion 23 through the positioning hole 3b12.

[0121] The positioning protrusion 23 protrudes to the side where the bracket 1 is located. When the disc spring 3b1 is installed, the positioning protrusion 23 can pass through the positioning hole 3b12 on the disc spring 3b1 to position the disc spring 3b1 and ensure the stability of the disc spring 3b1.

[0122] Specifically, such as Figure 11 As shown, the bracket 1 may include a second slide rail 12, and the ball bearing rollably abuts against the bottom surface of the second slide rail 12. The second slide rail 12 includes two inner wall surfaces and a bottom surface, which together form a "U"-shaped groove structure. At least a portion of the ball bearing is disposed within the second slide rail 12. The two side walls of the second slide rail 12 can guide the relative movement of the ball bearing, ensuring the stability of the relative movement between the connecting rod 2 and the bracket 1. The bottom surface of the second slide rail 12 can provide positive pressure for the ball bearing.

[0123] Among them, such as Figure 11 As shown, the bottom surface of the second slide rail 12 can be a plane, or at least partially an arc-shaped surface 111a. In one embodiment, the bottom surface of the second slide rail 12 can be a plane. When the ball contacts any position on the plane, the connecting rod 2 and the slide groove 13 are subjected to a stable and consistent positive pressure. That is to say, during the gradual opening or closing process of the main middle frame 10a and the secondary middle frame 10b, the damping force felt by the user is the same.

[0124] However, the actual damping force required by the main middle frame 10a and the secondary middle frame 10b during the entire opening or closing process is different. For example, when the main middle frame 10a and the secondary middle frame 10b are in the open and flattened state, the opening angle is 180°. When the main middle frame 10a and the secondary middle frame 10b are in the closed state, the opening angle is 0°. However, when the main middle frame 10a and the secondary middle frame 10b are about to be fully opened, such as when the opening angle is 160° to 175°, the main middle frame 10a and the secondary middle frame 10b need to be able to open quickly within the angle range of 5° to 20° before being fully opened, which can be done without damping force. However, when the bottom surface of the second slide rail 12 is a plane, it can only provide a stable and consistent damping force, making it difficult to achieve rapid rotation and opening of the main middle frame 10a and the secondary middle frame 10b.

[0125] Therefore, in another embodiment, the bottom surface of the second slide rail 12 is at least partially arc-shaped. This arc-shaped surface arches towards the distal damping module 3b, providing a relatively large positive pressure to the distal damping module 3b. This results in a larger damping force between the connecting rod 2 and the slide groove 13. Conversely, when the portion of the second slide rail 12 outside the arc-shaped surface abuts against the distal damping module 3b, the positive pressure on the distal damping module 3b is relatively small, resulting in a relatively small damping force between the connecting rod 2 and the slide groove 13. Using this principle, the arc-shaped surface in the second slide rail 12 can be positioned where the main middle frame 10a and the secondary middle frame 10b require a larger damping force, while the portion outside the arc-shaped surface, such as a flat surface, can be positioned where the main middle frame 10a and the secondary middle frame 10b require a smaller damping force, such as the position where the balls contact the second slide rail 12 when the main middle frame 10a and the secondary middle frame 10b are about to fully open.

[0126] Therefore, by setting an arc-shaped surface, different damping forces can be automatically matched according to the actual needs of the machine for opening and closing force, which can improve the user experience.

[0127] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A rotating shaft assembly, characterized in that, include: The bracket is provided with a sliding groove; A connecting rod, the edge of which is slidably embedded in the groove, and a cam is provided on the connecting rod; A distal damping module is disposed between the bracket and the connecting rod, with one end of the distal damping module connected to the connecting rod and the other end of the distal damping module connected to the bracket. The distal damping module generates a reaction force on the bracket due to the compression of the bracket, causing the sidewall of the slide to abut against the connecting rod; the direction of the reaction force is perpendicular to the mating interface between the inner sidewall of the slide and the connecting rod. The distal damping module includes a support shaft, a torsion spring, and a first pressure block; the support shaft is mounted on the connecting rod; the torsion spring is sleeved on the support shaft, and one end of the torsion spring has a free end; the end of the first pressure block facing the bracket abuts against the bracket, and the end of the first pressure block away from the bracket abuts against the end of the free end facing the bracket, and there is a gap between the end of the free end away from the bracket and the connecting rod; Alternatively, the distal damping module includes a disc spring and a second pressure block, with one recessed end of the disc spring mounted on the connecting rod and the other arched end connected to the second pressure block; the end of the second pressure block opposite to the disc spring abuts against the bracket.

2. The rotating shaft assembly according to claim 1, characterized in that, The connecting rod is provided with a groove, and the distal damping module is at least partially disposed in the groove.

3. The rotating shaft assembly according to claim 1 or 2, characterized in that, The support shaft is provided in two parts, and the torsion spring includes a first part and a second part. The first part is sleeved on one support shaft, and the second part is sleeved on the other support shaft. The first end of the first part is connected to the first end of the second part, and both the second end of the first part and the second end of the second part are provided with the free end.

4. The rotating shaft assembly according to claim 3, characterized in that, The first pressure block includes a roller, and the roller has protrusions at both ends in the axial direction, with each protrusion abutting against a corresponding free end.

5. The rotating shaft assembly according to claim 4, characterized in that, The bracket is provided with a first slide rail, and the roller can roll and abut against the bottom surface of the first slide rail.

6. The rotating shaft assembly according to claim 5, characterized in that, The bottom surface of the first slide is a plane, or at least partially an arc-shaped surface.

7. The rotating shaft assembly according to claim 1, characterized in that, The second pressure block is a ball bearing.

8. The rotating shaft assembly according to claim 7, characterized in that, The disc spring has a positioning groove at one of its arched ends, and the ball bearing is positioned in the positioning groove.

9. The rotating shaft assembly according to claim 1, characterized in that, The connecting rod is provided with a positioning protrusion, and the disc spring is provided with a positioning hole. The disc spring is sleeved on the positioning protrusion through the positioning hole.

10. The rotating shaft assembly according to claim 7, characterized in that, The bracket includes a second slide, and the ball bearing rollably abuts against the bottom surface of the second slide.

11. The rotating shaft assembly according to claim 10, characterized in that, The bottom surface of the second slide is a plane, or at least a partially curved surface.

12. An electronic device, comprising a mid-frame, characterized in that, The electronic device further includes a hinge assembly as described in any one of claims 1-11, the hinge assembly being connected to the mid-frame via the bracket.

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