WO2023236896A1

WO2023236896A1 - Hinge assembly and electronic device

Info

Publication number: WO2023236896A1
Application number: PCT/CN2023/098270
Authority: WO
Inventors: 刘雨; 林向晨; 李云勇; 徐正一; 陈一阳
Original assignee: 华为技术有限公司
Priority date: 2022-06-09
Filing date: 2023-06-05
Publication date: 2023-12-14
Also published as: CN117249160A

Abstract

Disclosed are a hinge assembly and an electronic device. The hinge assembly (10c) comprises a support (1), a connection rod (2) and far-end damping modules (3a, 3b). The support is provided with a sliding slot (13), an edge of the connection rod being slidably embedded in the sliding slot. The far-end damping modules are arranged between the support and the connection rod, of each far-end damping module, one end being connected to the connection rod while the other end being connected to the support. The far-end damping modules are pressed by the support to generate a reaction force on same, so that the side walls of the sliding slot abut against the connection rod, the direction of the reaction force being perpendicular to the fitting interfaces between the inner side walls of the sliding slot and the connection rod. In the present application, by providing the far-end damping modules between the connection rod and the support, the direction of the reaction force generated by the pressed far-end damping modules is only perpendicular to the fitting interfaces between the connection rod and the sliding slot, so that the reaction force completely serves as the friction force between the support and the connection rod. Thus, the damping effect between the support and the connection rod is effectively improved while Z-direction space can be saved, which helps to lighten and thin an electronic device.

Description

Shaft components and electronic equipment

This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on June 9, 2022, with application number 202210652262.0 and the application name "Rotating Shaft Assembly and Electronic Equipment", the entire content of which is incorporated into this application by reference. .

Technical field

The present application relates to the technical field of electronic equipment, and in particular to a rotating shaft assembly and electronic equipment.

Background technique

With the development of flexible screen technology, foldable mobile phones based on flexible screens have become an emerging technological innovation point in the industry today. In the existing design of folding mobile phones, the cam curve of the damping module is adjusted to change the opening and closing force to achieve free hovering. However, the hovering angle of this method is limited. If a larger hovering angle is required, adjustment is required. The cam curve will cause the cam design size to become larger, occupying more space inside the rotating shaft, and cannot make the entire machine thinner and lighter.

Application content

The purpose of this application is to provide a rotating shaft assembly and electronic equipment to solve the above-mentioned problem in the prior art that adjusting the cam curve to adjust the opening and closing force causes the cam design size to become larger, occupying the internal space of the rotating shaft, and making the whole machine unable to be light and thin. .

The first aspect of this application provides a rotating shaft assembly, which includes:

A bracket, the bracket is provided with a chute;

Connecting rod, the edge of the connecting rod is slidably embedded in the chute;

Distal damping module, the distal damping module is arranged between the bracket and the connecting rod, and 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 on the stent;

The distal damping module is extruded by the bracket to generate a reaction force on the bracket, causing the side wall of the chute to contact the connecting rod; the direction of the reaction force is perpendicular to the slide The mating interface between the inner wall of the groove and the connecting rod.

In the rotating shaft assembly provided by this application, by arranging a distal damping module between the connecting rod and the bracket, on the one hand, 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 chute. This reaction force is all contributed 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, the existing space between the connecting rod and the bracket can be used for layout without occupying additional Z-direction space, which is conducive to the thinning of the rotating shaft assembly and electronic equipment.

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

By opening a groove on the connecting rod, so that at least part of the distal damping module is disposed in the groove, the distal damping module can be prevented from occupying the extra Z-direction space of the connecting rod and the bracket, so that the relative positioning of the bracket and the connecting rod can be achieved. sports The damping effect is instantaneous and is conducive to the thinning of the rotating shaft assembly and electronic equipment.

In a possible design, the distal damping module includes a support shaft, a torsion spring and a first pressure block; the support shaft is installed on the connecting rod; the torsion spring is sleeved on the support shaft, so One end of the torsion spring is provided with a free end; the end of the first pressure block facing the bracket is in contact with the bracket, and the end of the first pressure block facing away from the bracket is in contact with the free end and facing the bracket. There is a gap between one end of the bracket and the end of the free end facing away from the bracket and the connecting rod.

The torsion spring has a spiral structure. The torsion spring can be sleeved on the support shaft. The support shaft can provide support. One end of the torsion spring can be relatively fixed on the support shaft, and the other end of the torsion spring is formed as a free end. When a force is applied to the free end in the radial direction of the torsion spring, since there is a gap between the end of the free end away from the bracket and the connecting rod, the free end can be deformed within the gap, thereby elastically deforming the torsion spring and generating elastic force. In this embodiment, the first pressure block can be squeezed by the bracket and the connecting rod to exert pressure on the free end of the torsion spring in the radial direction of the torsion spring. The direction of the pressure is toward the side of the connecting rod. At the same time, the torsion spring It will elastically deform after being compressed, and can produce a reverse reaction force on the first pressure block through its free end. The direction of the reaction force is perpendicular to the mating interface between the connecting rod and the slide groove, so that the reaction force can be fully contributed. Provides damping effect between connecting rod and slide groove.

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 another support shaft. Support shaft; the first end of the first part is connected to the first end of the second part, and the second end of the first part and the second end of the second part are both provided with the free end.

Both the first part and the second part are spiral-shaped, the first part and the second part may be arranged in parallel, the first end of the first part and the first end of the second part may both be an end away from the first pressing block, and the first part The first end and the first end of the second part can maintain a relatively stable state after being connected, that is, the two ends connected between the first part and the second part will not deform, or can only deform slightly, which can be ignored. The second end of the first part and the second end of the second part each have a free end that interacts with the first pressure block. The free end can undergo large elastic deformation after being compressed, so that the torsion spring can generate elastic force and can react. onto the first pressing block.

It should be noted that the chute can be symmetrically arranged on the bracket to ensure the smoothness of the sliding of the connecting rod relative to the bracket, and through the cooperation of the first part and the second part, both chute can be connected with the connecting rod. Reliable contact ensures that the damping effects generated at the two chutes are basically the same, which not only ensures that the rotating shaft assembly has a good damping effect, but also ensures the stability of the relative sliding of the connecting rod and the bracket.

In a possible design, the first pressing block includes a roller, and the roller is provided with protrusions at both ends in the axial direction, and each of the protrusions is in contact with a corresponding free end.

When the connecting rod and the bracket slide relative to each other, the roller can roll relative to the bracket, so that the connecting rod and the bracket can slide smoothly. That is to say, there is no need to generate a damping force between the roller and the bracket, only the connecting rod needs to The damping force can be generated at the mating interface with the chute, so that the size of the damping force can be controlled by controlling the material friction coefficient and positive pressure at the mating interface between the connecting rod and the chute, which facilitates the adjustment and control of the damping force. Adapt to the needs of the entire machine without having to separately adjust and match the damping forces at multiple locations. In addition, the two protrusions can be symmetrically arranged on both sides of the roller, so that the pressure exerted by the protrusions on both sides of the roller on the free end is consistent, thereby ensuring that the first and second parts of the torsion spring are elastically deformed. Consistent, ensuring that the direction and magnitude of the force are stable and consistent.

In a possible design, the bracket is provided with a first slideway, and the roller is rotatably connected with the third slideway. The bottom surface of a slide is in contact.

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

In a possible design, the bottom surface of the first slideway is a flat surface, or at least partially an arcuate surface.

When the bottom surface is a plane, when the roller contacts the plane at any position, a stable and consistent positive pressure is exerted between the connecting rod and the chute. That is to say, during the gradual opening or closing process of the main middle frame and the auxiliary middle frame , the damping force felt by the user is the same.

When at least part of the bottom surface is an arc-shaped surface, the arc-shaped surface is arched toward the side of the distal damping module, which can provide a relatively large positive pressure to the distal damping module, so that the connection between the connecting rod and the slide groove can be has a large damping force, and when the part of the first slideway outside the arc surface contacts the distal damping module, the positive pressure on the distal damping module is relatively small, so that the connection between the connecting rod and the slide groove can be has relatively small damping force. Utilizing this principle, the arcuate surface in the first slideway can be arranged at a position where the main middle frame and the auxiliary middle frame require greater damping force, and parts other than the arcuate surface, such as flat surfaces, can be arranged on the main middle frame. and the position where the auxiliary middle frame requires smaller damping force, such as the position where the rollers contact the first slide when the main middle frame and the auxiliary middle frame are about to be fully opened. Therefore, by setting up an arc surface, damping forces of different sizes can be automatically matched according to the actual demand for opening and closing force of the whole machine, which can improve the user experience.

In a possible design, the distal damping module includes a disc spring and a second pressure block, a concave end of the disc spring is installed on the connecting rod, and an arched end of the disc spring is connected to the second pressure block. The pressure block is connected; one end of the second pressure block away from the disc spring is in contact with the bracket.

Wherein, the concave end of the disc spring can be installed on the connecting rod, the arched end can be connected with the second pressure block, the bracket can be pressed on the second pressure block, and the disc spring can be moved toward the concave end through the second pressure block. When elastic deformation occurs on the side, the disc spring can produce reaction force on the connecting rod and bracket, so that the connecting rod and the chute are in reliable contact, and a damping force is generated between the connecting rod and the chute.

In one possible design, the second pressing block is a ball. When the connecting rod and the bracket slide relative to each other, the balls can roll, which is beneficial to the sliding of the connecting rod and the bracket. That is to say, in this embodiment, there may be no damping force between the ball and the bracket, or the damping force between the ball and the bracket may be negligible. It is only necessary to have a damping force between the connecting rod and the slide groove. Yes, which can facilitate the control and matching adjustment of the damping force.

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

Among them, the positioning groove can realize the positioning of the ball and prevent the ball from falling. The ball can be placed in the positioning groove or bonded in the positioning groove. In addition, the positioning groove is an arc-shaped groove, that is, the inner surface of the arc-shaped groove is a concave spherical surface, so that the balls can be restrained in all directions to prevent the balls from detaching from the positioning groove.

In a 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.

The positioning protrusion protrudes toward the side where the bracket is located. When the disc spring is installed, the positioning protrusion can pass through the positioning hole on the disc spring to realize the positioning of the disc spring and ensure the stability of the disc spring.

In a possible design, the bracket includes a second slideway, and the balls are rollably abutted against the bottom surface of the second slideway.

Wherein, the second slideway includes two inner wall surfaces and a bottom surface, and the two inner wall surfaces and a bottom surface form a "U" shaped groove structure. At least part of the balls are arranged in the second slideway. The second slideway The two side walls of the track can provide guidance for the relative movement of the balls to ensure the stability of the relative movement of the connecting rod and the bracket. The bottom surface of the second slide track can provide positive pressure for the balls.

In a possible design, the bottom surface of the second slideway is a flat surface, or at least a partially arcuate surface.

When the bottom surface of the second slip is flat, when the ball contacts the plane at any position, a stable and consistent positive pressure is exerted between the connecting rod and the chute. That is to say, during the gradual opening process of the main middle frame and the auxiliary middle frame Or during the closing process, the damping force felt by the user is the same.

When the bottom surface of the second slip is an arc surface, the arc surface is arched toward the side of the distal damping module, which can provide a relatively large positive pressure to the distal damping module, thereby making the connection between the connecting rod and the slide groove There is a large damping force between them, and when the part of the second slideway outside the arc surface contacts the distal damping module, the positive pressure on the distal damping module is relatively small, so that the connecting rod and the slide groove can There is relatively little damping force between them. Utilizing this principle, the arcuate surface in the second slideway can be disposed at a position where the main middle frame and the auxiliary middle frame require greater damping force, and parts other than the arcuate surface, such as flat surfaces, can be disposed on the main middle frame. and the position where the auxiliary middle frame requires smaller damping force, such as the position where the ball contacts the second slideway when the main middle frame and the auxiliary middle frame are about to be fully opened. Therefore, by setting up an arc surface, damping forces of different sizes can be automatically matched according to the actual demand for opening and closing force of the whole machine, which can improve the user experience.

A second aspect of the application also provides an electronic device, including a middle frame, wherein the electronic device further includes a rotating shaft assembly provided by the first aspect of the application, and the rotating shaft assembly is connected to the middle frame through the bracket. .

It should be understood that the above general description and the following detailed description are only exemplary and do not limit the present application.

Description of the drawings

Figure 1 is a schematic structural diagram of an existing cam;

Figure 2 is a schematic structural diagram of the electronic device provided by this application;

Figure 3 is a schematic structural diagram of a rotating shaft assembly provided by an embodiment of the present application;

Figure 4 is a schematic structural diagram of a rotating shaft assembly provided by an embodiment of the present application (hidden bracket);

Figure 5 is a schematic structural diagram of a connecting rod in a rotating shaft assembly provided by an embodiment of the present application;

Figure 6 is a schematic structural diagram of a distal damping module in a rotating shaft assembly provided by an embodiment of the present application;

Figure 7 is a schematic structural diagram of the bracket in the rotating shaft assembly provided by an embodiment of the present application;

Figure 8 is a schematic structural diagram of a rotating shaft assembly provided by another embodiment of the present application;

Figure 9 is a schematic structural diagram of a rotating shaft assembly provided by another embodiment of the present application (hidden bracket);

Figure 10 is a schematic structural diagram of a connecting rod in a rotating shaft assembly provided by another embodiment of the present application;

Figure 11 is a schematic structural diagram of a distal damping module in a rotating shaft assembly provided by another embodiment of the present application;

Figure 12 is a schematic structural diagram of a bracket in a rotating shaft assembly provided by another embodiment of the present application;

Figure 13 is a schematic structural diagram of a disc spring.

Reference signs:
100-Second transmission part;
101-Cam;
101a-side;
10-Electronic equipment;
10a-main middle frame;
10b-Secondary middle frame;
10c-Rotating shaft assembly;
1-Bracket;
11-First slide;
111-Bottom;
111a-Arc surface;
12-Second slide;
13-Chute;
2-Connecting rod;
21-groove;
22-groove;
23-Positioning bump;
3a-Remote damping module;
3a1-support shaft;
3a2-torsion spring;
3a21-free end;
3a22-Part 1;
3a23-Part 2;
3a3-the first pressing block;
3a31-Roller;
3a32-bulge;
3b-Remote damping module;
3b1-disc spring;
3b11-positioning slot;
3b12-positioning hole;
3b2-Second pressing block.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

Detailed ways

In order to better understand the technical solution of the present application, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present application and are not used to limit the present application.

In the description of this application, unless otherwise expressly stipulated and limited, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; unless otherwise specified or stated , the term "multiple" refers to two or more; the terms "connection", "fixed", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection. connection, or electrical connection; may be direct connected, or indirectly connected through an intermediary. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

Existing folding mobile phone designs usually include a main middle frame, a secondary middle frame, a rotating shaft assembly, and a flexible screen. The main middle frame and the secondary middle frame are rotationally connected through the rotating shaft assembly, and the flexible screen covers the main middle frame and the secondary middle frame. As for the middle frame, when the active frame and the auxiliary middle frame rotate relative to each other, the flexible screen can bend or flatten accordingly through its own flexibility characteristics.

During the rotation of the main middle frame and the auxiliary middle frame, when they do not need to be completely flattened or completely folded, the main middle frame and the auxiliary middle frame need to be able to hover and maintain at a certain angle, which requires the shaft assembly to provide Damping force to limit the opening and closing force of the whole machine. Traditional folding machines generally adjust the damping force by designing cam curves.

Figure 1 is a schematic structural diagram of an existing cam. As shown in Figure 1, the existing cam 101 is part of a transmission element, and is approximately a tooth-like structure protruding from the end of the transmission element. There can be a plurality of such cams 101, so that the end of the transmission member forms a wave peak formed by the cam, and a wave valley formed between two cams.

In order to achieve relative rotation between the main middle frame and the auxiliary middle frame, the rotating shaft assembly generally includes a first transmission member that is stationary, and a second transmission member 100 that rotates relative to the first transmission member. As shown in Figure 1, the first transmission member Both the first transmission member and the second transmission member 100 are provided with the above-mentioned cam 101, so that the first transmission member and the second transmission member 100 cooperate with each other through their respective cams.

Specifically, both the first transmission member and the second transmission member 100 can be sleeved on the same rotating shaft, that is, the first transmission member and the second transmission member 100 cooperate axially. When the second transmission member 100 rotates relative to the first transmission member, the cams on the two transmission members can always remain in contact, and as the two transmission members rotate relative to each other, the first transmission member and the second transmission member 100 will There are alternating changes in the matching of wave crests and wave crests, and the matching of wave crests and troughs. As shown in FIG. 1 , when the side surfaces 101 a of the cams 101 of the two transmission members contact each other and slide relative to each other, friction exists on 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 inclination angle between the side 101a and the axis of the transmission member. When the axial force from the transmission member acts on the side 101a of the cam 101, A component force perpendicular to the side will be generated, which can generate friction between the two cooperating cams 101 to achieve a damping effect. At the same time, a driving force will be generated, which is conducive to the two transmissions. The pieces rotate relative to each other.

That is to say, the force from the axial direction of the transmission part cannot all contribute to the damping effect. A part of the component force is still needed to drive the transmission part to rotate, which will weaken the damping effect. If you need to adjust the proportional distribution between the damping force and the driving force, you will generally consider changing the cam curve, that is, changing the size of each component force by designing the inclination angle, length and other parameters of the side 101a of the cam 101, and also consider the cam curve. Whether the overall size, such as length, thickness and other parameters satisfy the adjustment of the parameters of the cam side 101a, and the parameter changes of the cam 101 will also affect the overall matching design of the rotating shaft assembly. The design is complex and difficult to change after the cam 101 is prepared. In addition, if you need to obtain a larger hovering angle and damping effect, you need to increase the size of the cam to meet the design of the cam curve, which will inevitably lead to occupying more space in the rotating shaft assembly, which is not conducive to the thinning of the entire machine.

As shown in FIG. 2 , an embodiment of the present application provides an electronic device 10 and a rotating shaft assembly 10c. The rotating shaft assembly is applied to the electronic device. The electronic device may be a foldable device such as a foldable mobile phone or a notebook computer. This embodiment is preferably explained by taking the electronic device as a foldable mobile phone as an example.

The electronic device may include a middle frame, which may be used to carry a flexible screen. The rotating shaft assembly includes a bracket 1 , and the rotating shaft assembly may be connected to the middle frame through the bracket 1 . The middle frame may specifically include a main middle frame 10a and a auxiliary middle frame 10b. The main middle frame 10a and the auxiliary middle frame 10b can be rotated through a rotating shaft assembly, thereby realizing the folding of the electronic device. Or flatten.

Among them, as shown in Figures 3, 5, 8 and 10, the rotating shaft assembly 10c also includes a connecting rod 2 and distal damping modules 3a, 3b. The bracket 1 is provided with a chute 13, and the edge of the connecting rod 2 can slide Embed in chute 13. The cross section of the chute 13 may be U-shaped, and the connecting rod 2 slides relative to the bracket 1 through the chute 13 .

The distal damping modules 3a and 3b are arranged between the bracket 1 and the connecting rod 2. One end of the distal damping modules 3a and 3b is connected to the connecting rod 2, and the other end of the distal damping modules 3a and 3b is connected to the bracket 1. Among them, the distal damping modules 3a and 3b are arranged between the bracket 1 and the connecting rod 2, far away from the cam, and can independently achieve the damping effect. The distal damping modules 3a and 3b can be squeezed by the bracket 1 to generate a reaction force on the bracket 1, causing the inner wall of the chute 13 to contact the connecting rod 2, and the direction of the reaction force is perpendicular to the side wall of the chute 13 The mating interface with connecting rod 2.

Among them, the distal damping modules 3a and 3b are elastic and can elastically deform after being pressed, so that when they are squeezed by the bracket 1 and the connecting rod 2, they can produce a reaction force on the bracket 1 and the connecting rod 2, and increase the size of the chute. The frictional resistance between the inner wall of 13 and the connecting rod 2 improves the damping effect between the bracket 1 and the connecting rod 2. In addition, the distal damping modules 3a and 3b are arranged between the bracket 1 and the connecting rod 2. The distal damping modules 3a and 3b act in opposite directions on the bracket 1 and the connecting rod 2, so that the connecting rod 2 and the chute 13 are in contact with each other. The inner walls of the side away from the distal damping modules 3a and 3b are in contact.

It should be emphasized that the direction of the reaction force generated by the distal damping modules 3a and 3b after being compressed is perpendicular to the mating interface between the inner wall of the chute 13 and the connecting rod 2 . The mating interface between the inner wall of the chute 13 and the connecting rod 2 refers to the contact surface between the connecting rod 2 and the chute 13. Sliding friction can be generated on this mating interface. In this embodiment, the connecting rod 2 and the bracket 1 are arranged The distal damping modules 3a and 3b can make the direction of the reaction force generated by the distal damping modules 3a and 3b after being compressed only perpendicular to the mating interface. According to the friction force calculation formula f = μN, f is the sliding friction force, and μ is The dynamic friction factor, N, is the positive pressure on the action surface. The reaction force generated by the remote damping modules 3a and 3b after being compressed can all contribute to the friction force without causing friction loss due to component forces in other directions.

Therefore, in this embodiment, by arranging the distal damping modules 3a and 3b, 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, so that all the reaction force can be contributed to the bracket 1 The friction between the bracket 1 and the connecting rod 2 effectively improves the damping effect between the bracket 1 and the connecting rod 2. In addition, the distal damping modules 3a and 3b can be arranged using the existing space between the connecting rod 2 and the bracket 1 without occupying additional Z-direction space, which is conducive to the thinning of the rotating shaft assembly and electronic equipment.

As a specific implementation, as shown in Figure 3, Figure 4, Figure 8 and Figure 9, the connecting rod 2 can be provided with grooves 21, 22, and the distal damping modules 3a, 3b are at least partially provided in the groove 21 ,twenty two.

The part of the connecting rod 2 that slides with the bracket 1 can be a flat structure. The flat structure can have a certain thickness, and the grooves 21 and 22 can be provided on the flat structure. That is to say, through the connecting rod, 2 is provided with grooves 21, 22, so that at least part of the distal damping modules 3a, 3b are arranged in the grooves 21, 22, which can prevent the distal damping modules 3a, 3b from occupying the extra Z-direction space of the connecting rod 2 and the bracket 1 , thereby not only achieving the damping effect on the relative movement of the bracket 1 and the connecting rod 2, but also conducive to achieving the lightweight and thinning of the rotating shaft assembly and electronic equipment.

Of course, the connecting rod 2 can also be provided with holes, so that the distal damping modules 3a and 3b are at least partially disposed in the holes. Of course, the connecting rod 2 can also be provided with holes and grooves at the same time, and the distal damping modules 3a and 3b are accommodated through the cooperation of the holes and the grooves.

In a specific implementation, as shown in Figures 2 to 5, the distal damping module 3a may include a support shaft 3a1, a torsion spring 3a2 and a first pressure block 3a3. The distal damping module 3a can be disposed in a concave position as shown in Figures 4 and 5. In slot 21. The support shaft 3a1 is installed on the connecting rod 2, and 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 first pressure block 3a3 abuts against the bracket 1 at one end toward the bracket 1. The end of 3a3 facing away from the bracket 1 is in contact with the end of the free end 3a21 facing the bracket 1. There is a gap between the end of the free end 3a21 facing away from the bracket 1 and the connecting rod 2.

It can be understood that, as shown in Figure 5, the torsion spring 3a2 has a spiral structure. The torsion spring 3a2 can be sleeved on the support shaft 3a1. The support shaft 3a1 can provide support. One end of the torsion spring 3a2 can be relatively fixed on the support. on the shaft 3a1, and 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, because the free end 3a21 is away from the end of the bracket 1 and the connecting rod 2 With a gap, the free end 3a21 can be deformed within the gap, thereby elastically deforming the torsion spring 3a2 and generating elastic force. In this embodiment, the first pressure block 3a3 can be squeezed by the bracket 1 and the connecting rod 2 to exert pressure on the free end 3a21 of the torsion spring 3a2 in the radial direction of the torsion spring 3a2, and the direction of the pressure is toward where the connecting rod 2 is. On one side, 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 connecting rod 2 and the slide groove 13 The matching interface allows the reaction force to be fully contributed to the damping effect between the connecting rod 2 and the slide groove 13 .

Specifically, as shown in Figure 5, 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. In the support shaft 3a1, the first end of the first part 3a22 is connected to the first end of the second part 3a23, and the second end of the first part 3a22 and the second end of the second part 3a23 are both provided with free ends 3a21.

Wherein, as shown in Figure 5, both the first part 3a22 and the second part 3a23 are spiral-shaped, the first part 3a22 and the second part 3a23 can be arranged in parallel, and the first end of the first part 3a22 and the first end of the second part 3a23 can be They are all one end away from the first pressing block 3a3, and the first end of the first part 3a22 and the first end of the second part 3a23 can maintain a relatively stable state after being connected, that is, the first part 3a22 and the second part 3a23 are connected. There will be no deformation at the end, or only slight deformation, which can be ignored. The second end of the first part 3a22 and the second end of the second part 3a23 both have a free end 3a21 that interacts with the first pressing block 3a3. The free end 3a21 can undergo large elastic deformation after being compressed, causing the torsion spring 3a2 to produce The elastic force can react on the first pressing block 3a3.

It should be noted that, as shown in Figure 2, the chute 13 can be symmetrically arranged on the bracket 1 to ensure the smoothness of the sliding of the connecting rod 2 relative to the bracket 1, and through the cooperation of the first part 3a22 and the second part, The two chute 13 can be reliably contacted with the connecting rod 2, so that the damping effect produced by the two chute 13 is basically the same, which can not only ensure that the rotating shaft assembly has a good damping effect, but also ensure that the connecting rod 2 is in contact with the bracket. 1 relative sliding stability.

Specifically, the first pressure block 3a3 includes a roller 3a31. The roller 3a31 is provided with protrusions 3a32 at both ends in the axial direction. Each protrusion 3a32 is in contact with a corresponding free end 3a21.

As shown in Figure 5, when the connecting rod 2 and the bracket 1 slide relatively, the roller 3a31 can roll relative to the bracket 1, so that the connecting rod 2 and the bracket 1 can slide smoothly. That is to say, between the roller 3a31 and the bracket 1 There is no need to generate a damping force between the brackets 1. It only needs to generate a damping force at the mating interface between the connecting rod 2 and the chute 13. Thus, the material friction coefficient and the positive pressure at the mating interface between the connecting rod 2 and the chute 13 can be controlled. The size of the damping force can be controlled, making it easy to adjust and control the damping force to meet the needs of the entire machine, without having to adjust and match the damping forces at multiple locations separately. In addition, the two protrusions 3a32 can be symmetrically arranged on both sides of the roller 3a31, so that the pressure exerted by the protrusions 3a32 on both sides of the roller 3a31 on the free end 3a21 is consistent, thereby ensuring that the first part 3a22 of the torsion spring 3a2 and the second part of the torsion spring 3a2 are aligned. The two parts are in the same state of elastic deformation, ensuring the stability of the direction and magnitude of the force. must be consistent.

Specifically, as shown in FIG. 6 , the bracket 1 is provided with a first slideway 11 , and the roller 3 a 31 is in rolling contact with the bottom surface of the first slideway 11 .

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

As shown in FIG. 6 , the bottom surface 111 of the first slideway 11 is a flat surface, or at least partially an arcuate surface 111a. The first slideway 11 includes two inner wall surfaces and a bottom surface 111. The two inner wall surfaces and a bottom surface 111 are enclosed to form a "U"-shaped structure. The two inner wall surfaces can be used to limit the two sides of the roller 3a31 in the axial direction. An end surface prevents the roller 3a31 from shaking in the axial direction, and the bottom surface 111 of the first slideway 11 is the side that contacts the side of the roller 3a31. In one embodiment, the bottom surface 111 can be a flat surface. When the roller 3a31 contacts the flat surface at any position, a stable and consistent positive pressure is exerted between the connecting rod 2 and the chute 13. That is to say, when the main middle frame 10a The damping force felt by the user is the same as that during the gradual opening or closing process of the secondary middle frame 10b.

However, the actual damping forces required by the main middle frame 10a and the auxiliary middle frame 10b during the entire opening or closing process are different. For example, when the main middle frame 10a and the auxiliary middle frame 10b are in the open and flat state, the opening angle is 180°. When the main middle frame 10a and the auxiliary middle frame 10b are in the closed state, the opening angle is 0°. When the main middle frame 10a and the auxiliary middle frame 10b are about to be fully opened, the opening angle is 160°~ 175°, at this time, the main middle frame 10a and the auxiliary middle frame 10b need to be able to quickly open within the angle range of 5° to 20° before fully opening, and no damping force is required. When the bottom surface 111 of the first slide 11 is flat , it can only provide stable and consistent damping force, and it is difficult to realize the rapid rotation and opening of the main middle frame 10a and the auxiliary middle frame 10b.

To this end, in another embodiment, as shown in Figure 6, the bottom surface 111 of the first slide 11 is at least partially an arc surface 111a, and the arc surface 111a is arched toward one side of the distal damping module 3a. A relatively large positive pressure can be provided to the distal damping module 3a, so that there is a large damping force between the connecting rod 2 and the slide groove 13, and the part of the first slide 11 located outside the arc surface 111a When in contact with the distal damping module 3a, the positive pressure received by the distal damping module 3a is relatively small, so that there is a relatively small damping force between the connecting rod 2 and the slide groove 13. Utilizing this principle, the arcuate surface 111a in the first slideway 11 can be disposed at a position where the main middle frame 10a and the auxiliary middle frame 10b require greater damping force, while the parts other than the arcuate surface 111a are, for example, flat surfaces. It can be set at a position where the main middle frame 10a and the auxiliary middle frame 10b require smaller damping force, such as the position where the roller 3a31 contacts the first slide 11 when the main middle frame 10a and the auxiliary middle frame 10b are about to be fully opened.

Therefore, by arranging the arc surface 111a, damping forces of different sizes can be automatically matched according to the actual demand for opening and closing force of the whole machine, which can improve the user experience.

In another specific implementation, as shown in Figures 7 to 12, the distal damping module 3b includes a disc spring 3b1 and a second pressure block 3b2. The concave end of the disc spring 3b1 is installed on the connecting rod 2. The disc spring 3b1 The arched end is connected to the second pressure block 3b2, and the end of the second pressure block 3b2 away from the disc spring 3b1 is in contact with the bracket 1.

It can be understood that, as shown in Figure 12, 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 moves toward one end of the concave structure. The side undergoes elastic deformation and can produce reaction force on the pressure side. In this embodiment, the concave end of the disc spring 3b1 can be installed on the connecting rod 2, and the arched end can be connected with the second pressure block 3b2. The bracket 1 can be pressed on the second pressure block 3b2, and can pass through the second pressure block 3b2. The block 3b2 causes the disc spring 3b1 to elastically deform to the concave side, and the disc spring 3b1 can move the connecting rod 2 and The bracket 1 generates a reaction force to reliably contact the connecting rod 2 and the chute 13, so that a damping force is generated between the connecting rod 2 and the chute 13.

As shown in Figures 8 and 9, the connecting rod 2 can be provided with a groove 22, and the disc spring 3b1 can be placed in the groove 22, so that only part of the second pressure block 3b2 protrudes from the groove 22. , so as to be in contact with the bracket 1, so that there is no need to occupy additional Z-direction space. The Z-direction space is the space perpendicular to the relative sliding direction of the connecting rod 2 and the bracket 1, which is beneficial to realizing the thinning of the rotating shaft assembly and the electronic device.

Specifically, as shown in Figure 10, the second pressing block 3b2 is a ball. It can be understood that the ball is a sphere, and when the connecting rod 2 and the bracket 1 slide relative to each other, the ball can roll, thereby 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 and the bracket 1, or the damping force between the ball and the bracket 1 may be negligible, and only the connection between the connecting rod 2 and the slide groove 13 needs to be It only needs to have damping force, which can facilitate the control and matching adjustment of the damping force.

Specifically, as shown in Figure 12, the arched end of the disc spring 3b1 is provided with a positioning groove 3b11, and the balls are provided in the positioning groove 3b11. The positioning groove 3b11 can realize the positioning of the ball and prevent the ball from falling. The ball can be placed in the positioning groove 3b11, or can be bonded in the positioning groove 3b11. In addition, the positioning groove 3b11 is an arc-shaped groove, that is, the inner surface of the arc-shaped groove is a concave spherical surface, which can restrain the balls in all directions and prevent the balls from detaching from the positioning groove 3b11.

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

The positioning protrusion 23 protrudes toward 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 realize the positioning of the disc spring 3b1 and ensure that Stability of disc spring 3b1.

Specifically, as shown in FIG. 11 , the bracket 1 may include a second slideway 12 , and the balls may rollably contact the bottom surface of the second slideway 12 . The second slideway 12 includes two inner wall surfaces and a bottom surface. The two inner wall surfaces and a bottom surface form a "U" shaped groove structure. At least part of the balls are disposed in the second slideway 12. The two side walls of the slideway 12 can provide guidance for the relative movement of the balls to ensure the stability of the relative movement of the connecting rod 2 and the bracket 1. The bottom surface of the second slideway 12 can provide positive pressure for the balls.

As shown in FIG. 11 , the bottom surface of the second slideway 12 may be a flat surface, or at least partially an arcuate surface 111a. In one embodiment, the bottom surface of the second slideway 12 can be a plane. When the ball contacts the plane at any position, a stable and consistent positive pressure is exerted between the connecting rod 2 and the slideway 13. That is to say, when the ball contacts the plane at any position, During the gradual opening or closing process of the main middle frame 10a and the auxiliary middle frame 10b, the damping force felt by the user is the same.

However, the actual damping forces required by the main middle frame 10a and the auxiliary middle frame 10b during the entire opening or closing process are different. For example, when the main middle frame 10a and the auxiliary middle frame 10b are in the open and flat state, the opening angle is 180°. When the main middle frame 10a and the auxiliary middle frame 10b are in the closed state, the opening angle is 0°. When the main middle frame 10a and the auxiliary middle frame 10b are about to be fully opened, the opening angle is 160°~ 175°. At this time, the main middle frame 10a and the auxiliary middle frame 10b need to be able to quickly open within the angle range of 5° to 20° before fully opening, and no damping force is required. When the bottom surface of the second slide 12 is flat, Then it can only provide stable and consistent damping force, and it is difficult to realize the rapid rotation and opening of the main middle frame 10a and the auxiliary middle frame 10b.

To this end, in another embodiment, at least part of the bottom surface of the second slideway 12 is an arc-shaped surface. The arc-shaped surface is arched toward the side of the distal damping module 3b, which can provide a relatively small space for the distal damping module 3b. The large positive pressure allows a large damping force between the connecting rod 2 and the slide groove 13, and the second slideway 12 is located outside the arc surface. When the distal damping module 3b is partially in contact with the distal damping module 3b, the positive pressure received by the distal damping module 3b is relatively small, so that there is a relatively small damping force between the connecting rod 2 and the slide groove 13. Utilizing this principle, the arcuate surface in the second slideway 12 can be disposed at a position where the main middle frame 10a and the auxiliary middle frame 10b require greater damping force, and the portions other than the arcuate surface, such as flat surfaces, can be disposed Positions where the main middle frame 10a and the auxiliary middle frame 10b require smaller damping force, such as the position where the balls contact the second slideway 12 when the main middle frame 10a and the auxiliary middle frame 10b are about to be fully opened.

Therefore, by setting up an arc surface, damping forces of different sizes can be automatically matched according to the actual demand for opening and closing force of the whole machine, which can improve the user experience.

The above descriptions are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included in the protection scope of this application.

Claims

A rotating shaft assembly, characterized by including:

A bracket, the bracket is provided with a chute;

Connecting rod, the edge of the connecting rod is slidably embedded in the chute;

Distal damping module, the distal damping module is arranged between the bracket and the connecting rod, and 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 on the stent;

The distal damping module is extruded by the bracket to generate a reaction force on the bracket, causing the side wall of the chute to contact the connecting rod; the direction of the reaction force is perpendicular to the slide The mating interface between the inner side wall of the groove and the connecting rod.
The rotating shaft assembly according to claim 1, wherein a groove is provided on the connecting rod, and the distal damping module is at least partially disposed in the groove.
The rotating shaft assembly according to claim 1 or 2, characterized in that the distal damping module includes a support shaft, a torsion spring and a first pressure block;

The support shaft is installed on the connecting rod;

The torsion spring is sleeved on the support shaft, and one end of the torsion spring is provided with a free end;

One end of the first pressure block facing the bracket abuts against the bracket, one end of the first pressure block facing away from the bracket abuts against an end of the free end facing toward the bracket, and the free end faces away from the bracket. There is a gap between one end of the bracket and the connecting rod.
The rotating shaft assembly according to claim 3, characterized in that there are two support shafts, the torsion spring includes a first part and a second part, the first part is sleeved on one support shaft, and the second Partially sleeved on another support shaft;

The first end of the first part is connected to the first end of the second part, and the second end of the first part and the second end of the second part are both provided with the free end.
The rotating shaft assembly according to claim 4, wherein the first pressure block includes a roller, and the rollers are respectively provided with protrusions at both ends in the axial direction, and each of the protrusions is connected to a corresponding free wheel. Ends touching.
The rotating shaft assembly according to claim 5, wherein the bracket is provided with a first slideway, and the roller is in rolling contact with the bottom surface of the first slideway.
The rotating shaft assembly according to claim 6, wherein the bottom surface of the first slideway is a flat surface, or at least partially an arcuate surface.
The rotating shaft assembly according to claim 1 or 2, characterized in that the distal damping module includes a disc spring and a second pressure block, a concave end of the disc spring is installed on the connecting rod, and the disc spring arch One end is connected to the second pressing block;

One end of the second pressure block away from the disc spring is in contact with the bracket.
The rotating shaft assembly according to claim 8, wherein the second pressing block is a ball.
The rotating shaft assembly according to claim 9, wherein the arched end of the disc spring is provided with a positioning groove, and the ball is provided in the positioning groove.
The rotating shaft assembly according to claim 8, wherein 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.
The rotating shaft assembly according to claim 8, wherein the bracket includes a second slideway, and the ball is rollably contacted with the bottom surface of the second slideway.
The rotating shaft assembly according to claim 11, wherein the bottom surface of the second slideway is a flat surface, or at least a partially arcuate surface.
An electronic device includes a middle frame, characterized in that the electronic device further includes the rotating shaft assembly according to any one of claims 1 to 13, and the rotating shaft assembly is connected to the middle frame through the bracket.