Synchronizing mechanism, rotating shaft mechanism and electronic equipment

Abstract

A synchronizing mechanism, a rotating shaft mechanism and an electronic device, the synchronizing mechanism comprises a base (7), a slide block (3), an elastic component (20), and a first swing arm (1) and a second swing arm (2) which are located at two sides of the slide block, the first swing arm and the second swing arm are both provided with protruding parts, the end face of one of the protruding parts and the slide block is provided with a helical surface, and the end face of the other one is provided with an abutting part matched with the corresponding helical surface. Under the action of the elastic component, the spiral face elastically abuts against the abutting portion so that the first swing arm and the second swing arm can rotate at the same angle relative to the base. The synchronizing mechanism can be applied to electronic equipment such as mobile phones, tablet personal computers, tablet personal computer accessories and wearable equipment, is simple in processing technology and low in cost, occupies small space in the thickness direction of the mobile phones in the mode that the spiral surfaces and the abutting parts are matched and axially slide, and meets the light and thin design requirements of the electronic equipment such as the mobile phones.

Description

[0001] This application is a divisional application submitted to the State Intellectual Property Office of China on October 31, 2024, with application number 2023800378440, and the invention name is "A synchronization mechanism, a rotating shaft mechanism and an electronic device".

[0002] This application claims the priority of the Chinese patent application filed with the State Intellectual Property Office of China on July 6, 2022, with application number 202210789257.4, and invention name “A synchronization mechanism, a rotating shaft mechanism and an electronic device”, the entire contents of which are incorporated by reference in the embodiments of this application. Technical Field

[0003] The present application relates to the field of electronic products, and in particular to a synchronization mechanism, a rotating shaft mechanism and an electronic device. Background Art

[0004] The two side shells of the electronic device are connected to the rotating shaft mechanism, and the relative folding and unfolding of the two shells are realized by the rotating shaft mechanism. The rotating shaft mechanism includes a first swing arm and a second swing arm, which are respectively connected to the two shells, and the two swing arms drive the shells to fold and unfold when they rotate. In order to make the two swing arms swing synchronously, the rotating shaft mechanism is equipped with a synchronization mechanism. The current synchronization mechanism mainly has the following forms: gear assembly, worm gear structure and gear rack structure, all of which realize the synchronization of the swing arms on both sides through meshing teeth. In order to ensure the strength of the meshing teeth, the sizes of the gears and turbines have a minimum limit size, so each synchronization mechanism occupies a relatively large space, and the tooth meshing synchronization mechanism has relatively many parts, which is costly and complicated to assemble. Summary of the invention

[0005] The embodiments of the present application provide a synchronization mechanism, a rotating shaft mechanism and an electronic device with a simple structure, low cost and small space occupation.

[0006] In one embodiment, the synchronization mechanism includes a base, a slider, and a first swing arm and a second swing arm located on both sides of the slider, the first swing arm and the second swing arm are both rotatably connected to the base; the slider is slidably arranged along an axial direction parallel to the rotation of the first swing arm and the second swing arm;

[0007] The first swing arm and the second swing arm are both provided with a protrusion, the end surface of one of the protrusion and the slider has a spiral surface, and the end surface of the other is provided with a supporting portion that matches the corresponding spiral surface;

[0008] The synchronization mechanism also includes an elastic component. Under the action of the elastic component, the spiral surface elastically abuts against the abutting portion. When the first swing arm and the second swing arm rotate, the spiral surface and the abutting portion cooperate with each other to drive the slider to slide axially so that the first swing arm and the second swing arm rotate at the same angle relative to the base.

[0009] On the one hand, compared with the spiral groove formed on the main body between the two end surfaces of the slider, the spiral surface in the present application is formed on the end surface of the slider. The spiral surface has no undercut structure and can be directly formed by a mold or through conventional CNC machining. The molding process is relatively simple, and the spiral surface and the abutment part cooperate in axial sliding in the thickness direction of the mobile phone to occupy a relatively small space, which meets the requirements of lightweight design of electronic devices such as mobile phones; on the other hand, under the action of the restoring force of the elastic component, the spiral surface and the abutment part elastically abut, that is, the elastic component is in a compressed state along the axial direction. In this way, the elastic component can keep the spiral surface and the abutment part in an abutment state at all times during the rotation of the swing arm, thereby improving the synchronization of the rotation of the swing arms on both sides.

[0010] In one example, the first swing arm and the second swing arm are both split structures, and both the first swing arm and the second swing arm include a first sub-swing arm and a second sub-swing arm that can rotate synchronously, the first sub-swing arm and the second sub-swing arm can move relative to each other along the axial direction, and at least one of the first sub-swing arm and the second sub-swing arm has a protrusion. In this example, the first swing arm and the second swing arm are set as a split structure, which is convenient for the arrangement of elastic components and improves the flexibility of mechanism design.

[0011] In one example, the first sub-swing arm is provided with a protrusion A, the second sub-swing arm is provided with a protrusion B, the corresponding end faces of the protrusion A and the protrusion B are provided with abutment portions, the slider is located between the protrusion A and the protrusion B on the same side, and under the action of the elastic component, the two end faces of the slider arranged along the axial direction elastically abut against the protrusion A and the protrusion B on the same side respectively.

[0012] In one example, it also includes a first rotating shaft and a second rotating shaft installed on the base, the first rotating shaft and the second rotating shaft are arranged in parallel, the first swing arm rotates around the first rotating shaft, the second swing arm rotates around the second rotating shaft, and the slider slides along the first rotating shaft and the second rotating shaft.

[0013] In one example, the protrusion A and the protrusion B are provided with coaxial through holes for allowing the corresponding side rotation shafts to pass through.

[0014] In one example, a first sleeve is provided on both sides of the slider, and the first sleeves on both sides are slidably sleeved on the first rotating shaft and the second rotating shaft respectively. Both end faces of each first sleeve have a spiral surface, which respectively cooperates with the abutment portion of the protrusion A and the abutment portion of the protrusion B.

[0015] In one example, one of the non-hinged ends of the first sub-swing arm and the second sub-swing arm is provided with a groove, and the other is provided with a protrusion inserted into the groove, and the protrusion and the groove cooperate to achieve synchronous rotation of the first sub-swing arm and the second sub-swing arm.

[0016] In one example, it also includes a third swing arm and a fourth swing arm, which are rotatably connected to both sides of the base respectively, and elastic components are pressed between the third swing arm and the first swing arm, and between the fourth swing arm and the second swing arm.

[0017] In one example, a damping device is also included, which includes an elastic damping component that is circumferentially limited to the base and can be extended and retracted along the axial direction. The third swing arm and the fourth swing arm both have a first concave-convex surface, and the elastic damping component has a second concave-convex surface that corresponds to the first concave-convex surface one by one and elastically abuts against the first concave-convex surface. When the third swing arm and the fourth swing arm rotate, the first concave-convex surface rotates relative to the second concave-convex surface to provide damping.

[0018] In one example, the third swing arm and the fourth swing arm are both provided with two protrusions C arranged at intervals along the axial direction, the protrusions C are provided with through holes for the corresponding side rotating shafts to pass through, and the two opposite surfaces of the two protrusions C are both provided with first concave-convex surfaces.

[0019] In one example, the elastic damping component includes a first bracket, a second bracket and a first elastic member, both sides of the first bracket and the second bracket have a second sleeve, the two second sleeves are respectively sleeved on the first rotating shaft and the second rotating shaft, the first elastic member is pressed between the first bracket and the second bracket, and each second sleeve is provided with a second concave-convex surface at the end away from the first elastic member.

[0020] In one example, the elastic component includes a first elastic component and a second elastic component, the first elastic component is located outside the rotation axis of the first swing arm, and its two ends are supported on the non-hinged ends of the first swing arm and the third swing arm, and the second elastic component is located outside the rotation axis of the second swing arm, and its two ends are supported on the non-hinged ends of the second swing arm and the fourth swing arm.

[0021] In one example, a coaxial first hole is provided at the non-hinged end of the third swing arm and the first sub-swing arm and the second sub-swing arm on the same side, a first shaft is provided inside the first hole, and a first elastic component is sleeved on the first shaft; a coaxial second hole is provided at the non-hinged end of the fourth swing arm and the first sub-swing arm and the second sub-swing arm on the same side, a second shaft is provided inside the second hole, and a second elastic component is sleeved on the second shaft.

[0022] In one example, the elastic component includes two first elastic members, which are respectively mounted on the first rotating shaft and the second rotating shaft, and the first elastic member and the base, as well as the second elastic member and the base are circumferentially limited, and at least one end of the first elastic member and the second elastic member can abut against the concave and convex surface of the swing arm on the corresponding side to provide rotational damping.

[0023] In one example, the elastic component also includes a bracket, and both sides of the bracket have second sleeves, the two second sleeves are respectively sleeved on the first rotating shaft and the second rotating shaft, the two elastic components are abutted against the swing arms on the corresponding sides through the bracket, and the two second sleeves cooperate with the concave and convex surfaces of the corresponding swing arms.

[0024] In one example, the bracket includes a first bracket and a second bracket located at both ends of the elastic component, the first swing arm and the second swing arm elastically abut against the concave and convex surfaces of the second sleeve on both sides of the first bracket, and the third swing arm and the fourth swing arm elastically abut against the concave and convex surfaces of the second sleeve on both sides of the second bracket.

[0025] In one example, the elastic component further includes a second elastic member, the second elastic member is located between the two first elastic members, and supports for mounting the second elastic member are further provided on opposite sides of the first bracket and the second bracket.

[0026] In one example, it also includes a shaft body that passes through the non-hinged ends of the swing arms on the same side of the base. Driven by the shaft body, the swing arms on the same side of the base rotate synchronously.

[0027] In one example, one of the two opposite surfaces of the base and the slider is provided with a guide rail, and the other is provided with a groove that slides axially with the guide rail, and the guide rail and the groove extend axially.

[0028] In a second aspect, the present application further provides a rotating shaft mechanism, including a base and any of the above-mentioned synchronization mechanisms, wherein the base is fixedly connected or limit-connected to the base.

[0029] In a third aspect, the present application also provides an electronic device, including a flexible screen and the above-mentioned hinge mechanism.

[0030] The rotating shaft mechanism and electronic device of the present application include the above-mentioned synchronization mechanism, and therefore also have the above-mentioned technical effects of the synchronization mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of a rotating shaft mechanism provided in an embodiment of the present application being applied to an electronic device;

[0032] Figure 2 for Figure 1 an exploded schematic diagram of the electronic device shown;

[0033] Figure 3 for Figure 2 A partial schematic diagram of the assembly of the central shaft mechanism and the main body;

[0034] Figure 4 A three-dimensional schematic diagram of the synchronization mechanism in the first example of the present application;

[0035] Figure 5 for Figure 4 A front view of the synchronization mechanism;

[0036] Figure 6 for Figure 4 An exploded schematic diagram of the synchronization mechanism shown;

[0037] Figure 7 for Figure 4 A three-dimensional schematic diagram of the middle slider;

[0038] Figure 8 for Figure 4 3D schematic diagram of the first swing arm;

[0039] Fig. 9 for Figure 4 A three-dimensional schematic diagram of the first bracket;

[0040] Fig.10 for Figure 4 A schematic diagram of a first mounting block constituting a base;

[0041] Fig.11 A three-dimensional schematic diagram of a synchronization mechanism in a second example of the present application;

[0042] Fig.12 for Fig.11 3D schematic diagram of the first swing arm;

[0043] Fig.13 Fig.11 A three-dimensional schematic diagram of the middle slider;

[0044] Fig.14 A three-dimensional schematic diagram of a synchronization mechanism in a third example of the present application;

[0045] Fig.15 for Fig.14 A front view schematic diagram of

[0046] Fig.16 for Fig.14 3D schematic diagram of the first swing arm;

[0047] Fig.17 A three-dimensional schematic diagram of a synchronization mechanism in a fourth example of the present application;

[0048] Fig.18 for Fig.17 An exploded schematic diagram of the first sub-swing arm and the second sub-swing arm;

[0049] Fig.19 for Fig.17 An exploded schematic diagram of the synchronization mechanism shown;

[0050] Fig. 20 This is a schematic diagram of the structure of the synchronization mechanism in the fifth example of the present application. Specific embodiments

[0051] In the description of the embodiments of the present application, it should be noted that the terms "left", "right", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the technology, and do not indicate or imply that the device or element referred to must have a specific direction, a specific orientation structure and operation. Therefore, they cannot be understood as limitations on the present invention.

[0052] In the following, the terms "first", "second", etc. are used only for descriptive purposes and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features.

[0053] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0054] The hinge mechanism provided in the embodiment of the present application can be applied to electronic devices, wherein the electronic device can be a mobile phone, a tablet computer, a tablet computer accessory, a wearable device, a vehicle-mounted device, an augmented reality (AR) / virtual reality (VR) device, a laptop computer, an ultra-mobile personal computer (UMPC), a netbook, a personal digital assistant (PDA) and other mobile terminals, or it can also be a digital camera, a SLR camera / micro-single camera, a sports camera, a gimbal camera, a drone and other professional shooting equipment. The embodiment of the present application does not limit the specific type of the electronic device. For the sake of ease of understanding, the electronic device is taken as an example for explanation below.

[0055] Please refer to Figures 1 to 3 , Figure 1 A schematic diagram of a rotating shaft mechanism provided in one embodiment of the present application being applied in an electronic device; Figure 2 for Figure 1 an exploded schematic diagram of the electronic device shown; Figure 3 for Figure 2 A partial schematic diagram of the assembly of the central shaft mechanism and the main body; Figure 2 The central axis X is marked in Figure 3 The horizontal center line Y is marked in .

[0056] The electronic device provided in the embodiment of the present application includes a flexible screen 300, a main body 200 and a hinge mechanism 100. There are two main bodies 200, and the two main bodies 200 are connected by the hinge mechanism 100. The hinge mechanism 100 enables the two main bodies 200 to be folded and unfolded relative to each other. For a mobile phone, the main body 200 can be a middle frame. The main body 200 depends on the folding screen terminal, and this article does not make specific advances. The following text continues to introduce the technical solution and technical effects with the main body 200 as the middle frame.

[0057] At least part of the flexible screen 300 can be supported on the middle frame and connected to the middle frame. When the two middle frames are folded and unfolded relative to each other, the flexible screen 300 is in the folded state and the unfolded state at the same time. The structures of the left and right middle frames can be the same or different. The specific structures of the two middle frames can be stable according to the specific product, and are not specifically limited herein.

[0058] The flexible screen 300 may include a display module and a transparent cover plate. The display module can display images and videos, etc. The display module may include structural layers such as a touch screen, a light-emitting layer, a backplane layer, and a substrate layer. The specific structure of the display module may be selected according to different products. The display module may use a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED), a flexible light-emitting diode (FLED), a quantum dot light-emitting diode (QLED), etc. The transparent cover plate covers the outside of the display module to protect the display module. The transparent cover plate may be a glass cover plate, or of course, other transparent materials that can play a protective role.

[0059] Please refer to Figure 3 In the embodiment of the present application, the shaft mechanism 100 includes a base (not shown in the figure) and a synchronization mechanism. Figure 3 Point A in the middle is the installation position of the synchronization mechanism. The base mainly provides an installation foundation for other components that make up the hinge mechanism. The base can be an integrated structure, or a split structure, that is, the base can be split into multiple parts, and the multiple parts are fixedly connected by fixings (such as screws), gluing or welding. Usually, the hinge mechanism also includes a shaft cover, which is located on the side of the base away from the flexible screen. It can shield other components of the hinge mechanism and improve the appearance of the electronic device.

[0060] The synchronization mechanism of the rotating shaft mechanism 100 in the embodiment of the present application is used to make the main body parts 200 on both sides rotate synchronously relative to the base during the folding or unfolding process. Of course, in theory, under the action of the synchronization mechanism, the rotation angles of the main body parts 200 on both sides relative to the base remain consistent, but it is understandable that due to assembly or processing deviations, the two rotation angles of the main body parts 200 on both sides relative to the base during the rotation process may be allowed to have a certain angle deviation, that is, within the range of this angle deviation, the two main body parts can still be regarded as rotating synchronously.

[0061] Please refer to Figure 4 and Figure 5 , Figure 4 A three-dimensional schematic diagram of a synchronization mechanism in the first example of an embodiment of the present application; Figure 5 for Figure 4 Front view of the synchronization mechanism.

[0062] In the embodiment of the present application, the synchronization mechanism includes a base 7, a slider 3, a first swing arm 1, a first rotating shaft 5, a second rotating shaft 6, a first swing arm 1 and a second swing arm 2, wherein the base 7 can be an integral structure with the above-mentioned base, that is, the base 7 is a part of the base, and of course the base 7 and the base can also be two independent parts, fixedly connected by a fixing member or other fixing methods (such as welding, screw connection, etc.). Figure 2 and Figure 3 It can be seen that the shaft mechanism 100 is arranged with two sets of synchronization mechanisms, which are respectively close to the two ends along the axial direction of the shaft mechanism 100. Of course, the number of synchronization mechanisms can be reasonably selected according to different electronic devices and is not limited to the description in this article, that is, the shaft mechanism can also include two or more sets of synchronization mechanisms. Please refer to Figure 3 The rotating shaft mechanism of the embodiment of the present application is provided with two sets of synchronization mechanisms, and the two sets of synchronization mechanisms are symmetrically arranged about the transverse center line Y. In addition to the synchronization mechanism, the rotating shaft mechanism of the embodiment of the present application also includes two sets of end main swing arms 9 and middle main swing arms 10, wherein the two sets of end main swing arms 9 are adjacent to the two sets of synchronization mechanisms, and the two sets of end main swing arms 9 are also symmetrically arranged relative to the transverse center line Y.

[0063] The first rotating shaft 5 and the second rotating shaft 6 of the synchronization mechanism are arranged in parallel on the base 7, and the length direction of the first rotating shaft 5 and the second rotating shaft 6 is along the axial direction of the rotating mechanism. The first rotating shaft 5 and the second rotating shaft 6 can be fixedly connected to the base 7, and of course can also be rotatably connected to the base 7. In one example, the base 7 includes a first mounting block 71 and a second mounting block 72, which are respectively located at the two ends of the base 7 along the axial direction. The first mounting block 71 and the second mounting block 72 are both provided with mounting holes, and the first rotating shaft 5 and the second rotating shaft 6 are inserted and installed inside the mounting holes of the first mounting block 71 and the second mounting block 72. In the embodiment of the present application, the four corners of the first mounting block 71 have a sleeve structure 711, and the inner hole of the sleeve structure 711 forms a mounting hole. In one example, the axial limit of the first rotating shaft 5 and the second rotating shaft 6 relative to the base 7 can be achieved by a limiter, and the limiter can be a nut or a locking pin or other components.

[0064] The first swing arm 1 and the second swing arm 2 in the embodiment of the present application are respectively mounted on the first rotation axis 5 and the second rotation axis 6. The first swing arm 1 can rotate relative to the base 7 around the first rotation axis 5, and the second swing arm 2 can rotate relative to the second rotation axis 6. The first swing arm 1 and the second swing arm 2 are both arranged symmetrically with respect to the central axis X of the base, and the first rotation axis 5 and the second rotation axis 6 are located on the left and right sides of the central axis X. The structures of the first swing arm 1 and the second swing arm 2 can be the same, or of course different.

[0065] It should be noted that, in this article, the direction close to the central axis X is defined as the inside, and correspondingly, the direction away from the central axis is defined as the outside.

[0066] The first swing arm 1 and the second swing arm 2 are respectively connected to the main body on both sides. For example, the first swing arm 1 and the second swing arm 2 can be swing arms fixed to the main body to drive the main body on both sides to fold or unfold relatively. The embodiment of the present application defines the swing arm fixedly connected to the main body as the main swing arm. Of course, the first swing arm 1 and the second swing arm 2 can also be relatively movably connected to the main body. For example, the non-hinged ends of the first swing arm 1 and the second swing arm 2 are not directly fixed to the main body and can slide relative to the main body during the rotation process. The embodiment of the present application defines this type of swing arm as an auxiliary swing arm. Figure 4 As shown, the first swing arm 1 and the second swing arm 2 can both be provided with an oblong through hole 1a, and a shaft body ( Figure 4 Not shown, please refer to Fig.17 The shaft body is inserted into the oblong through hole 1a, so that when the main body and the main swing arm rotate, the first swing arm 1 and the second swing arm 2 will rotate accordingly and slide along the length direction of the oblong through hole 1a with the shaft body. For example, the end main swing arm 9 can be fixed with a shaft body, which can drive the swing arm in the adjacent synchronization mechanism to work together.

[0067] Usually, driven by each swing arm, the main body parts on both sides can rotate back and forth between 0° and 90°. When the angle between the swing arm and the horizontal plane is 0°, the main body part is roughly in a horizontal state and the flexible screen 300 can be in a flattened state. At this time, the flexible screen 300 is roughly horizontal as a whole. When the angle between the swing arm and the horizontal plane is 90°, it drives the main body parts on both sides to rotate to a vertical state, and the flexible screen 300 is in a folded state.

[0068] The specific connection method between the first swing arm 1 and the second swing arm 2 of the synchronization mechanism in the embodiment of the present application and the main body is not limited, as long as the first swing arm 1 and the second swing arm 2 are linked with the middle frame, for example, the shaft body can be fixed on the auxiliary swing arm, an oblong through hole 1a is provided on the main swing arm, or the main swing arm and the auxiliary swing arm are linked by the matching method of the protrusion and the groove, etc. The slider 3 in the synchronization mechanism in the embodiment of the present application can move along the axial direction of the rotating shaft mechanism, that is, the slider 3 can only move in the axial direction relative to the base 7.

[0069] Please refer to Figure 6 and Figure 7 , Figure 6 for Figure 4 An exploded schematic diagram of the synchronization mechanism shown; Figure 7 for Figure 4 3D schematic diagram of the slider.

[0070] In the embodiment of the present application, both sides of the slider 3 include a first sleeve 31 with an inner hole 31a, and the first rotating shaft 5 and the second rotating shaft 6 pass through the first sleeve 31 on the left and right sides of the slider 3 respectively, and the slider 3 can only move axially along the first rotating shaft 5 and the second rotating shaft 6.

[0071] In the embodiment of the present application, the first swing arm 1 and the second swing arm 2 are both provided with a protrusion, and the protrusion may be two or more. The protrusion may be provided with a through hole for the first rotating shaft 5 or the second rotating shaft 6 to pass through. That is to say, the first swing arm 1 and the second swing arm 2 are sleeved on the corresponding rotating shafts through the protrusions provided thereon.

[0072] Please refer to Figure 4In this application, there are four protrusions on the first swing arm 1 and the second swing arm 2, which are arranged in sequence along the axial direction. According to the different functions of the protrusions, this article defines the four protrusions as two first protrusions 11 and two third protrusions 13, wherein the two first protrusions 11 are adjacent and arranged close to the bottom, and the two third protrusions 13 are adjacent and arranged close to the top. The slider 3 is located between the two first protrusions 11, and the opposite end faces of the two first protrusions 11 are provided with abutment portions. The two end faces of the slider 3 are provided with helical surfaces that cooperate with the abutment portions on the corresponding sides. Through the cooperation between the helical surfaces and the abutment portions, the synchronous rotation of the first swing arm 1 and the second swing arm 2 on the left and right sides can be achieved. Theoretically, the helical surfaces on the two end faces of the slider 3 are always in abutment with the abutment portions on the corresponding sides. Limited by the stroke of the slider 3, the helical surface can be only a small section of the helical structure, and the projection in the plane perpendicular to the axial direction can be an annular structure. The central angle of the annular structure can be from 0 (excluding the endpoint value) to 360 degrees (including the endpoint value). Figure 7 A specific example of a ring structure with a central angle of approximately 180 degrees is shown. The ring structure is relatively easy to process when the central angle is within the range of 0 to 180 degrees. Of course, the central angle of the ring structure is not limited to that shown in this article and can be any value from 0 to 360 degrees.

[0073] Of course, the number of protrusions is not limited to the 4 described above in this article, and can be other numbers.

[0074] It can be understood from the above that, compared with the spiral groove formed on the main body between the two end surfaces of the slider 3, the spiral surface in the embodiment of the present application is formed on the end surface of the slider 3. The spiral surface has no undercut structure and can be directly formed using a mold or through conventional CNC machining. The molding process is relatively simple, and the spiral surface and the abutment portion cooperate in axial sliding, so that the space occupied in the thickness direction of the mobile phone is relatively small, which meets the design requirements of thin and light electronic devices such as mobile phones.

[0075] The above is a specific example of setting a helical surface on the end surface of the slider 3. Those skilled in the art should understand that the above technical effect can also be achieved by setting a helical surface on the end surface of the first protrusion 11 and setting abutment on the end surface of the slider 3. That is, the end surface of one of the first protrusion 11 and the slider 3 is provided with a helical surface, and the end surface of the other is provided with abutment that matches the helical surface.

[0076] Several specific examples are introduced below by taking the arrangement of a spiral surface on the slider 3 as an example.

[0077] Please refer to Figure 4 , Figure 7 and Figure 8 understand, Figure 8 for Figure 4A three-dimensional schematic diagram of the first swing arm 1 in FIG. In the first example, both end surfaces of the first sleeve 31 on both sides of the slider 3 have spiral surfaces, and there are two first protrusions 11. The two first protrusions 11 are spaced apart in the axial direction and have coaxial through holes. The first rotating shaft 5 passes through the through hole of the first protrusion 11 on the first swing arm 1 on the left, and the second rotating shaft 6 passes through the through hole of the first protrusion 11 on the second swing arm 2 on the right. The opposing surfaces of the two first protrusions 11 are provided with a first abutting portion 111 and a second abutting portion 111', which are respectively used to cooperate and abut with the spiral surfaces of the two end surfaces of the first sleeve 31. As shown in FIG. Figure 7 and Figure 8 As shown, the first helical surface 311 of the upper end surface of the slider 3 abuts against the first abutment 111 provided on the end surface of the first protrusion 11, and the second helical surface 311' of the lower end surface of the slider 3 abuts against the second abutment 111' provided on the end surface of another first protrusion 11.

[0078] The first swing arm 1 and the second swing arm 2 rotate synchronously under the cooperation of the first helical surface 311 and the first abutting portion 111 , and the second helical surface 311 ′ and the second abutting portion 111 ′, and have relatively high stability.

[0079] Theoretically, in order to ensure that the first helical surface 311 and the first abutting portion 111, as well as the second helical surface 311' and the second abutting portion 111' can always abut, the distance between the first abutting portion 111 and the second abutting portion 111' is substantially equal to the distance between the first helical surface 311 and the second helical surface 311'. In other words, the distance between the helical surfaces located at both end surfaces of the same first sleeve 31 is substantially equal to the distance between the first abutting portion and the second abutting portion.

[0080] In view of factors such as processing errors and assembly tolerances, the helical surface and the abutment portion may not abut against each other during rotation after the synchronization mechanism is assembled. Therefore, the following settings are also made in the embodiments of the present application.

[0081] See also Fig.11 , Fig.14 , Fig.15 The synchronization mechanism of the embodiment of the present application further includes an elastic component 20. Under the action of the restoring force of the elastic component 20, the helical surface and the abutment portion elastically abut against each other, that is, the elastic component 20 is in a compressed state along the axial direction. In this way, the elastic component can make the helical surface and the abutment portion always in an abutment state during the rotation of the swing arm, thereby improving the synchronization of the rotation of the swing arms on both sides.

[0082] The elastic component 20 may be a spring, or other elastic components, such as silicone or rubber. Figure 4As shown, the number of the elastic components can be two, and the two elastic components 20 can be respectively mounted on the first rotating shaft 5 and the second rotating shaft 6. Of course, the number of the elastic components can also be one, or other numbers.

[0083] According to the different installation positions of the elastic component, the embodiment of the present application provides a second specific example.

[0084] Please refer to Fig.11 , Fig.12 and Fig.13 , Fig.11 A three-dimensional schematic diagram of a synchronization mechanism in a second example of an embodiment of the present application; Fig.12 for Fig.11 3D schematic diagram of the first swing arm; Fig.13 Fig.11 3D schematic diagram of the slider.

[0085] In the second example, only one end face of the slider 3 is provided with a spiral surface, and accordingly, the number of the first protrusion 11 of the first swing arm 1 and the second swing arm 2 is also one, and the end face of the first protrusion 11 is provided with a butt portion. In order to facilitate the installation of the elastic component, the first swing arm 1 and the second swing arm 2 are further provided with a second protrusion 12, and the second protrusion 12 is arranged at intervals from the first protrusion 11. The elastic component 20 is pressed between the slider 3 and the second protrusion 12, and specifically, the elastic component can be pressed between the other end face of the slider 3 and the second protrusion 12. Specifically, the end face of the slider 3 opposite to the second protrusion 12 can be a planar structure, and of course, structures such as an elastic component mounting seat can also be further provided.

[0086] In this embodiment, only one end of the slider 3 is processed with a spiral surface, the structure is relatively simple, and the axial space occupied is relatively small.

[0087] The second raised portion 12 may also be provided with a through hole coaxial with the first raised portion 11 for the corresponding side rotating shaft to pass through, so that each raised portion is installed in cooperation with the rotating shaft at the same time, which can improve the installation strength of the swing arm.

[0088] In order to further improve the rotation flexibility of the shaft mechanism, the embodiment of the present application further makes the following improvements to the synchronization mechanism.

[0089] Please refer to Figures 14 to 16 , Fig.14 A three-dimensional schematic diagram of a synchronization mechanism in a third example of an embodiment of the present application; Fig.15 for Fig.14 A front view schematic diagram of Fig.16 for Fig.14 3D schematic diagram of the first swing arm.

[0090] In the third example, the slider 3 of the synchronization mechanism includes a first slider and a second slider, and the elastic component 20 is pressed between the first slider and the second slider. The relatively distant end surfaces of the first slider and the second slider are both provided with spiral surfaces. The structure of the slider 3 in this example is the same as the structure of the slider 3 in the second example, except that two sliders 3 are provided in this example, and the elastic component is pressed between the two sliders 3. Accordingly, two spaced-apart first protrusions 11 are provided on the first swing arm 1 and the second swing arm 2, and abutment portions are provided on the relative surfaces of the two first protrusions 11, that is, the structure of the first swing arm 1 and the second swing arm 2 in this example is roughly the same as the structure of the first swing arm 1 and the second swing arm 2 in the first example, and the spacing between the two first protrusions 11 may also be slightly different.

[0091] Under the action of the restoring force of the elastic component, the spiral surfaces of the sliders 3 on both sides of the elastic component can always abut against the abutting parts of the first protrusions 11 on the corresponding sides.

[0092] Likewise, in this example, there are two elastic components, which are respectively mounted on the first rotating shaft 5 and the second rotating shaft 6 on both sides.

[0093] The difference between the above three embodiments is only that the matching position structure between the slider 3 and the swing arm (the first swing arm 1 or the second swing arm 2) is different, and the other structures of the synchronization mechanism can be substantially the same.

[0094] Please refer to the following for further reference Figure 6 and Fig.10 The base 7 of the synchronization mechanism of the embodiment of the present application is provided with a guide rail 712. For example, the guide rail 712 is provided on the first mounting block 71, and the slider 3 is provided with a groove 32. The guide rail 712 and the groove both extend axially, and the guide rail 712 and the groove 32 are axially slidably matched, so that the guide rail and the groove further guide the axial movement of the slider 3, and also improve the sliding stability of the slider 3.

[0095] Of course, the base 7 is provided with a groove, and the slider 3 is provided with a guide rail that matches the groove, which can also be said to achieve the above technical effect.

[0096] In order to improve the hand feel of the electronic device when folding and unfolding, the synchronization mechanism can be further provided with a damping device 4 for providing rotation damping for the first swing arm 1 and the second swing arm 2. The damping device 4 is directly installed between the first swing arm 1 and the second swing arm 2. Of course, the damping device 4 can also be indirectly connected to the first swing arm 1 and the second swing arm 2.

[0097] In the embodiment of the present application, the damping device 4 includes an elastic damping component that is limited by the base 7 in the circumferential direction and can be extended and retracted in the axial direction, that is, the elastic damping component can move relatively in the axial direction, but is restricted in the circumferential direction from the base 7 and cannot rotate relative to each other. The first swing arm 1 and the second swing arm 2 both have a first convex-concave surface, and the elastic damping component has a second convex-concave surface that corresponds to the first convex-concave surface one by one and elastically abuts against the first convex-concave surface. The first convex-concave surface 1b and the second convex-concave surface 4a are both wave surfaces with smooth transitions in the circumferential direction, and the degree of undulation between the concave surface and the convex surface of the wave surface can be reasonably selected according to the damping size required by the electronic device. During the rotation of the first swing arm 1 and the second swing arm 2, the first convex-concave surface 1b slides relative to the second convex-concave surface and the friction force generated by the elastic abutment can provide rotation damping. When the higher points of the first convex-concave surface 1b and the second convex-concave surface are in contact, the friction force is relatively large, and the hovering function can be realized.

[0098] In the embodiment of the present application, the first swing arm 1 and the second swing arm 2 are both provided with two third protrusions 13 arranged at intervals. The third protrusion 13 is provided with a through hole for the corresponding side rotation axis to pass through. The first rotation axis 5 passes through the through hole of the third protrusion 13 of the left first swing arm 1, and the second rotation axis 6 is located in the through hole of the third protrusion 13 of the right second swing arm 2. Combined with the above description, the first rotation axis 5 is simultaneously arranged inside the through hole of each protrusion (the first protrusion 11, the second protrusion 12 and the third protrusion 13) on the same side to achieve a rotation connection with the base 7. The two opposite surfaces of the third protrusion 13 are both provided with a first convex-concave surface 1b, that is, the third protrusion 13 is also a sleeve structure, which is defined as a third sleeve in this article. The end face of the third sleeve is provided with a first convex-concave surface 1b. In this embodiment, the first convex-concave surface 1b is coaxially arranged with the rotation axis, and the structure is compact.

[0099] Please refer to Fig. 9 , accordingly, the four ends of the elastic damping component may also have a sleeve structure, which is defined as the second sleeve 441 in this article, and the third sleeve is provided with a second convex and concave surface at the corresponding end of the second sleeve 441. In this embodiment, the elastic damping component includes a first bracket 43, a second bracket 44 and a first elastic member 41, the first elastic member 41 is pressed between the first bracket 43 and the second bracket 44, and both sides of the first bracket 43 and the second bracket 44 have a second sleeve 441 with a through hole 4a, and the second sleeves 441 on both sides are respectively sleeved on the first rotating shaft 5 and the second rotating shaft 6, that is, the first bracket 43 (second bracket 44) is sleeved on the first rotating shaft 5 and the second rotating shaft 6 at the same time, so that the first bracket 43 (second bracket 44) cannot rotate relative to the base 7, but can slide along the axial direction of the first rotating shaft 5 and the second rotating shaft 6.

[0100] In order to simplify processing and improve assembly efficiency, the first bracket 43 and the second bracket 44 may have the same structure.

[0101] When the first swing arm 1 and the second swing arm 2 on both sides rotate simultaneously, the first convex-concave surfaces 1b on the two swing arms rotate relative to the second convex-concave surfaces 4a of the sleeves on both sides, and at the same time provide rotational damping for the first swing arm 1 and the second swing arm 2, thereby improving the user feel of the electronic device while achieving synchronous rotation of the first swing arm 1 and the second swing arm 2.

[0102] In the embodiment of the present application, the number of the first elastic members 41 can be two, and the two elastic members are respectively sleeved on the first rotating shaft 5 and the second rotating shaft 6, and each end of the second sleeve 441 away from the first elastic member 41 is provided with a second convex and concave surface. The first rotating shaft 5 and the second rotating shaft 6 can respectively guide the expansion and contraction of the two first elastic members 41.

[0103] Of course, the number of the first elastic member 41 may also be one, or more.

[0104] Generally, the greater the elastic abutment force between the first convex-concave surface 1b and the second convex-concave surface 4a, the greater the rotation damping. In order to improve the rotation damping of the damping device 4, a second elastic member 42 can be further added. The second elastic member 42 can be arranged between the two first elastic members 41, and a support for mounting the second elastic member 42 can be arranged on the opposite side of the first bracket 43 and the second bracket 44. As shown in 9, the first bracket 43 and the second bracket 44 are provided with a guide rod, and the second elastic member 42 is sleeved on the guide rod.

[0105] The first elastic member 41 and the second elastic member 42 may both be springs.

[0106] The third example above introduces a specific implementation method of dividing the slider 3 into a first slider 3 and a second slider 3 to achieve elastic abutment between the spiral surface and the abutment portion. Of course, it is also possible to divide the first swing arm 1 and the second swing arm 2 into two parts to achieve elastic abutment between the spiral surface and the abutment portion.

[0107] In the above examples, the damping device can be arranged between the first swing arm 1 and the second swing arm 2, and of course, it can also be arranged separately, between other swing arms of the rotating shaft mechanism, that is, relatively independent of the synchronization mechanism, such as Fig.17 shown.

[0108] Please refer to Figures 17 to 19 , Fig.17 A three-dimensional schematic diagram of a synchronization mechanism in a fourth example of an embodiment of the present application; Fig.18 for Fig.17 An exploded schematic diagram of the first sub-swing arm 1-1 and the second sub-swing arm 1-2; Fig.19 for Fig.17 Schematic diagram of the exploded view of the synchronization mechanism shown.

[0109] In the fourth example, the first swing arm 1 and the second swing arm 2 both include a first sub-swing arm 1-1 and a second sub-swing arm 1-2 that can be relatively separated along the axial direction. The first sub-swing arm 1-1 and the second sub-swing arm 1-2 are two independent components that can move relatively along the axial direction. The amount of movement can be determined according to the actual electronic device. In addition, the first sub-swing arm 1-1 and the second sub-swing arm 1-2 have constraints along the circumferential direction so that the two rotate synchronously. The first sub-swing arm 1-1 and the second sub-swing arm 1-2 are constrained by a constraint member so that they cannot rotate relative to each other. The constraint member can be a groove and a convex block structure. For example, one of the first sub-swing arm 1-1 and the second sub-swing arm 1-2 is provided with a groove 1c, and the other is provided with a convex block 1-21 inserted into the groove 1c to limit the circumferential rotation of the two. The groove 1c and the convex block 1-21 can be provided at the non-articulated ends of the first sub-swing arm 1-1 and the second sub-swing arm 1-2. Of course, the circumferential constraint method of the first sub-swing arm 1-1 and the second sub-swing arm 1-2 is not limited to the above method, and can also be other methods, such as by buckles.

[0110] The first sub-swing arm 1-1 and the second sub-swing arm 1-2 both have a raised portion. In this example, the raised portion of the first sub-swing arm 1-1 is defined as the raised portion A1-11, and the raised portion of the second sub-swing arm 1-2 is defined as the raised portion B1-12. The above definition is only for the purpose of describing the technical solution clearly and concisely, wherein the structures of the raised block A1-11 and the raised block B1-12 can be the same as the first raised portion 11 in the first to third examples above. Different from the first example, the two first raised portions 11 that abut against the slider 3 in the first example are located on the same swing arm, while the raised portions that abut against the slider 3 in this example are located on two sub-swing arms. The slider 3 is located between the raised portion A1-11 and the raised portion B1-12 on the same side. Under the action of the elastic component, the two end faces of the slider 3 arranged along the axial direction elastically abut against the raised portion A1-11 and the raised portion B1-12 respectively.

[0111] Of course, the end surface shapes of the protrusion A1 - 11 and the protrusion B1 - 12 can be in various forms as long as they can achieve cooperation and abutment with the slider 3 .

[0112] The slider 3 is located between the convex block A1-11 and the convex block B1-12. The end surface of the slider 3 can be provided with a helical surface. The convex block A1-11 and the convex block B1-12 are smooth surfaces that can slide along the helical surface, such as arc-shaped surfaces or helical surfaces of a short length. The figure shows that the two end surfaces of the slider 3 are provided with helical surfaces, and the corresponding end surfaces of the convex block A1-11 and the convex block B1-12 are provided with abutment portions.

[0113] In this example, the first swing arm 1 and the second swing arm 2 are designed as a split structure, and both are divided into relatively independent first sub-swing arm 1-1 and second sub-swing arm 1-2, and the two can be relatively far away from or close to each other along the axial direction. When the slider 3 is installed in place, the axial position of the first sub-swing arm 1-1 and the second sub-swing arm 1-2 can be adjusted to make the abutting part and the spiral surface in an abutting state. This not only facilitates the installation of the slider 3, but also designs one swing arm into two parts, which can also reduce the processing technology of the swing arm.

[0114] The above describes an example in which the two ends of the slider 3 are provided with spiral surfaces, and the first sub-swing arm 1-1 and the second sub-swing arm 1-2 are provided with raised portions. Those skilled in the art should understand that the above technical effect can also be achieved by providing a spiral surface on one side of the slider 3 and only providing a raised portion on the first sub-swing arm 1-1 and the second sub-swing arm 1-2. Of course, the slider 3 is provided with a supporting portion, and the end faces of the raised portions of the first sub-swing arm 1-1 and the second sub-swing arm 1-2 are provided with a spiral surface that matches the supporting portion, and the technical details are not described in detail in this article.

[0115] In this example, the base 7 may also be provided with a first rotation axis 5 and a second rotation axis 6, the first rotation axis 5 and the second rotation axis 6 are provided in parallel, the first swing arm 1 rotates around the first rotation axis 5, the second swing arm 2 rotates around the second rotation axis 6, and the slider 3 can slide along the first rotation axis 5 and the second rotation axis 6. This is the same as the above-mentioned structures.

[0116] In order to improve the stability of the rotating shaft mechanism, the first sub-swing arm 1-1 and the second sub-swing arm 1-2 on the same side can be both mounted on the corresponding side rotating shaft. For example, the protrusion A of the first sub-swing arm 1-1 of the first swing arm 1 and the protrusion B of the second sub-swing arm 1-2 can be provided with coaxial through holes for the first rotating shaft 5 to pass through, and the protrusion A of the first sub-swing arm 1-1 of the second swing arm 2 and the protrusion B of the first sub-swing arm 1-2 can be provided with coaxial through holes for the second rotating shaft 6 to pass through.

[0117] The structure of the slider 3 in this example can be the same as that of the first example. A first sleeve 31 is provided on both sides of the slider 3. The first sleeves 31 on both sides are respectively slidably sleeved on the first rotating shaft 5 and the second rotating shaft 6. Each of the two end faces of the first sleeve 31 has a spiral surface 311, which respectively cooperates with the abutment portion of the corresponding side protrusion A and the abutment portion of the protrusion B.

[0118] The length and technical effect of the spiral surface are the same as those in the above example and will not be described in detail here.

[0119] Based on the fourth example, the installation position of the elastic component can have various forms, and two different installation methods are given below.

[0120] Please refer again Fig.17On the basis of the fourth example, the synchronization mechanism may further include a third swing arm 3-1 and a fourth swing arm 3-2, which are rotatably connected to both sides of the base 7, the third swing arm 3-1 and the first swing arm 1 are located on the same side of the base 7 and are arranged in sequence along the axial direction, the fourth swing arm 3-2 and the second swing arm 2 are located on the same side, and the fourth swing arm 3-2 and the second swing arm 2 are arranged in sequence along the axial direction, an elastic component is pressed between the first swing arm 1 and the third swing arm 3-1, and an elastic component is pressed between the fourth swing arm 3-2 and the second swing arm 2. The elastic component may be installed at a non-hinged end away from the hinged ends of the first swing arm 1 and the second swing arm 2.

[0121] The third swing arm 3-1 and the fourth swing arm 3-2 can be fixedly connected to the main body, that is, as the main swing arm. Of course, they can also be able to slide relative to the main body during rotation, as auxiliary swing arms. The third swing arm 3-1 and the fourth swing arm 3-2 only need to be able to form a linkage mechanism with the main body.

[0122] like Fig.17 As shown, in order to make the swing arms on the same side of the base 7 swing at the same angle relative to the base 7, in the embodiment of the present application, an oblong through hole 1a is provided on each swing arm. As shown in the figure, the first sub-swing arm 1-1, the second sub-swing arm 1-2 and the third swing arm 3-1 are all provided with an oblong through hole 1a, and the first shaft body 3-3 is simultaneously provided inside the oblong through hole 1a of each swing arm. When the main body rotates, the first shaft body 3-3 can slide inside the oblong through hole 1a to drive the swing arms to rotate synchronously. Similarly, the swing arms on the right side of the base 7 are also provided with an oblong through hole 1a and a second shaft body 3-4 located inside each oblong through hole 1a to coordinate the swing arms to swing at the same angle.

[0123] Of course, the holes formed on the swing arms are not limited to the oblong through holes 1a, and may be other structures, that is, the left swing arm is formed with a first hole, the right swing arms are formed with a second hole, the first shaft passes through the first holes to achieve synchronous rotation of the left swing arms, and the second shaft passes through the second holes to achieve synchronous rotation of the right swing arms.

[0124] In this example, the elastic component includes a first elastic component 201 and a second elastic component 202, which are respectively mounted on the first shaft 3-3 and the second shaft 3-4. In this example, the first shaft 3-3 and the second shaft 3-4 can simultaneously perform the functions of installing and guiding the two elastic components, and the synchronization mechanism structure is relatively compact.

[0125] The first elastic component is located outside the rotation axis of the first swing arm 1, and its two ends are supported on the non-rotating ends of the first swing arm 1 and the third swing arm 3-1, and the second elastic component is located outside the rotation axis of the second swing arm 2, and its two ends are supported on the non-hinged ends of the second swing arm 2 and the fourth swing arm 3-2. The first elastic component and the second elastic component are arranged at the outer end away from the rotation axis of each swing arm, so that the space is relatively large and the design flexibility is relatively high.

[0126] The first elastic component 201 can apply an elastic force to the left first sub-swing arm 1-1 toward the second sub-swing arm 1-2 to push the first sub-swing arm 1-1 toward the second sub-swing arm 1-2, thereby making the abutment portion (upper abutment portion) of the first sub-swing arm 1-1 abut and press against the spiral surface of the slider 3. At the same time, the slider 3 moves toward the second sub-swing arm 1-2, and the spiral surface at the other end of the slider 3 also abuts and contacts against the abutment portion 111 (lower abutment portion) of the second sub-swing arm 1-2.

[0127] Similarly, under the elastic restoring force of the second elastic component, the spiral surfaces at both end surfaces on the right side of the slider 3 also come into contact with the corresponding abutting portions.

[0128] In this example, in order to improve the folding and unfolding feel of the electronic device, a damping device 4 can also be provided. The structure of the damping device 4 can be the same as that of the damping device 4 in the first example. The damping device 4 can be installed between the two first sub-swing arms 1-1, or the two second sub-swing arms 1-2, or between the third swing arm 3-1 and the fourth swing arm 3-2. Figure 17-Figure 19 The specific structure of the damping device 4 installed between the third swing arm 3-1 and the fourth swing arm 3-2 is given. The damping device 4 includes an elastic damping component that is limited by the base 7 in the circumferential direction and can be extended and retracted in the axial direction. The third swing arm 3-1 and the fourth swing arm 3-2 both have a first convex-concave surface 1b, and the elastic damping component has a second convex-concave surface 4a that corresponds to the first convex-concave surface 1b and elastically abuts against it. When the third swing arm 3-1 and the fourth swing arm 3-2 rotate, the first convex-concave surface 1b rotates relative to the second convex-concave surface 4a to provide damping.

[0129] In this example, the third swing arm 3-1 and the fourth swing arm 3-2 are both provided with two spaced apart protrusions C3-11, the protrusions C3-11 are provided with through holes for the corresponding side rotation shafts to pass through, and the two opposite surfaces of the two protrusions C3-11 are both provided with first convex-concave surfaces 1b.

[0130] The elastic damping component includes a first bracket 43, a second bracket 44 and a first elastic member 41. Both sides of the first bracket 43 and the second bracket 44 are provided with a second sleeve. The two second sleeves are respectively sleeved on the first rotating shaft 5 and the second rotating shaft 6. The first elastic member 41 is pressed between the first bracket 43 and the second bracket 44. The end of each second sleeve away from the first elastic member 41 is provided with a second convex and concave surface 4a.

[0131] In another example, the elastic component and the elastic member of the damping device 4 are designed as an integrated structure, that is, the elastic member in the damping device 4 can not only play the function of rotational damping, but also play the function of making the abutment part and the spiral surface abut against each other. The specific structure of the synchronous structure is as follows.

[0132] Please refer to Fig. 20 , Fig. 20 This is a schematic diagram of the structure of the synchronization mechanism in the fifth example of an embodiment of the present application.

[0133] In the fifth example, the elastic component includes two first elastic members 41, which are respectively mounted on the first rotating shaft 5 and the second rotating shaft 6. The first elastic member 41 is circumferentially limited with the base 7, and the second elastic member 42 is circumferentially limited with the base 7. At least one end of the first elastic member 41 and the second elastic member 42 can be abutted against the convex and concave surfaces of the swing arm on the corresponding side to provide rotational damping. Fig. 20 The example in which the first sub-swing arm 1-1 is provided with a sleeve 1-10, and the sleeve 1-10 is provided with a convex-concave surface of the elastic component. That is to say, the first elastic member 41 cannot rotate relative to the base 7 in the circumferential direction, and the second elastic member 42 cannot rotate relative to the base 7 in the circumferential direction. In this way, when each swing arm rotates relative to the base 7, because the first elastic member 41 at least abuts against the convex-concave surface of one end of the swing arm, friction damping can be generated between the two to meet the user's hand feeling requirements.

[0134] In this example, the elastic component includes a bracket, and both sides of the bracket have second sleeves, and the two second sleeves are respectively sleeved on the first rotating shaft 5 and the second rotating shaft 6. Under the action of the elastic component, the two second sleeves elastically cooperate with the corresponding convex and concave surfaces of the swing arm to provide rotation damping. The structure of the bracket can refer to the structure of the first bracket 43 and the second bracket 44 in the above examples.

[0135] The bracket includes a first bracket 43 and a second bracket 44 located at both ends of the elastic component. The first swing arm 1 and the second swing arm 2 elastically abut against the convex and concave surfaces of the second sleeve on both sides of the first bracket 43, and the third swing arm 3-1 and the fourth swing arm 3-2 elastically abut against the convex and concave surfaces of the second sleeve on both sides of the second bracket 44.

[0136] Of course, in order to increase the damping force of the shaft mechanism, or the contact force between the abutting portion and the spiral surface, the elastic component further includes a second elastic member 42, the second elastic member 42 is located between the two first elastic members 41, and a support for mounting the second elastic member 42 is further provided on the opposite sides of the first bracket 43 and the second bracket 44. The support can be an axially extending guide rod, and the second elastic member 42 is sleeved on the guide rod.

[0137] Of course, the synchronization mechanism in this example is also provided with a first shaft 3-3 and a second shaft 3-4, the first shaft 3-3 passes through the non-hinged end of each swing arm located on the left side of the base 7, and the second shaft 3-4 passes through the non-hinged end of each swing arm located on the right side of the base 7. For the first shaft 3-3, the second shaft 3-4 and the structure of each swing arm mounting the first shaft and the second shaft, reference can be made to the above.

[0138] Those skilled in the art should understand that the arrangement of the elastic component includes but is not limited to the following two ways. For example, the elastic component may not be arranged on the first shaft body 3-3 and the second shaft body 3-4, and a spring mounting seat may be arranged on the opposite end surfaces of the first sub-swing arm 1-1 and the second sub-swing arm 1-2, and the elastic component may be installed on the spring mounting seat. Similarly, in this example, the base 7 and the slider 3 may also be provided with a guide rail 712 and a groove 32 to further guide the axial movement of the slider 3.

[0139] The electronic device in the embodiment of the application includes the hinge mechanism 100 of the above embodiment, and thus also has the above technical effects of the hinge mechanism 100.

[0140] The embodiments of the present application use specific examples to illustrate the principles and implementation methods of the embodiments of the present application. The description of the above embodiments is only used to help understand the methods and core ideas of the embodiments of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the embodiments of the present application, several improvements and modifications can be made to the embodiments of the present application, and these improvements and modifications also fall within the scope of protection of the claims of the embodiments of the present application.

Claims

1. A rotating shaft mechanism, characterized in that: It comprises a base, a slider, and a first swing arm and a second swing arm located on both sides of the slider, wherein the first swing arm and the second swing arm are both rotatably connected to the base; the slider is slidably arranged along an axial direction parallel to the rotation of the first swing arm and the second swing arm; The first swing arm and the second swing arm are both provided with a protrusion, and both end surfaces of the protrusion and the slider have spiral surfaces, and the other is provided with a first abutment portion and a second abutment portion, and the first abutment portion and the second abutment portion respectively abut against the two spiral surfaces, and can drive the slider to slide along the axial direction so that the first swing arm and the second swing arm rotate synchronously relative to the base.

2. The rotating shaft mechanism according to claim 1, characterized in that: The rotating shaft mechanism also includes an elastic component. Under the action of the elastic component, the two spiral surfaces elastically abut against the first abutting portion and the second abutting portion respectively. When the first swing arm and the second swing arm rotate, the two spiral surfaces respectively cooperate with the first abutting portion and the second abutting portion to drive the slider to slide along the axial direction so that the first swing arm and the second swing arm rotate synchronously relative to the base.

3. The rotating shaft mechanism according to claim 2, characterized in that: The first swing arm and the second swing arm are both split structures, and the first swing arm and the second swing arm both include a first sub-swing arm and a second sub-swing arm that can rotate synchronously, the first sub-swing arm and the second sub-swing arm can move relative to each other along the axial direction, and at least one of the first sub-swing arm and the second sub-swing arm has the protrusion.

4. The rotating shaft mechanism according to claim 3, characterized in that: The first sub-swing arm is provided with a protrusion A, and the second sub-swing arm is provided with a protrusion B. The end surfaces corresponding to the protrusion A and the protrusion B are respectively provided with the first abutment portion and the second abutment portion. The slider is located between the protrusion A and the protrusion B on the same side. Under the action of the elastic component, the two end surfaces of the slider arranged along the axial direction elastically abut against the protrusion A and the protrusion B on the same side respectively.

5. The rotating shaft mechanism according to claim 4, characterized in that: It also includes a first rotating shaft and a second rotating shaft installed on the base, the first rotating shaft and the second rotating shaft are arranged in parallel, the first swing arm rotates around the first rotating shaft, the second swing arm rotates around the second rotating shaft, and the slider slides along the first rotating shaft and the second rotating shaft.

6. The rotating shaft mechanism according to claim 5, characterized in that: The protrusion A and the protrusion B are provided with coaxial through holes for the corresponding side rotation shafts to pass through.

7. The rotating shaft mechanism according to claim 6, characterized in that: A first sleeve is provided on both sides of the slider, and the first sleeves on both sides are slidably sleeved on the first rotating shaft and the second rotating shaft respectively. Both end surfaces of each first sleeve have the spiral surface, which cooperates with the first abutment portion and the second abutment portion respectively.

8. The rotating shaft mechanism according to any one of claims 3 to 7, characterized in that: One of the non-hinged ends of the first sub-swing arm and the second sub-swing arm is provided with a groove, and the other is provided with a protrusion inserted into the groove, and the protrusion cooperates with the groove to realize synchronous rotation of the first sub-swing arm and the second sub-swing arm.

9. The rotating shaft mechanism according to any one of claims 2 to 8, characterized in that: It also includes a third swing arm and a fourth swing arm, which are rotatably connected to two sides of the base respectively.

10. The rotating shaft mechanism according to any one of claims 1 to 9, characterized in that: It also includes a damping device, which includes an elastic damping component which is circumferentially limited to the base and can be extended and retracted along the axial direction. The first swing arm and the second swing arm both have a first concave-convex surface. The elastic damping component has a second concave-convex surface which corresponds to the first concave-convex surface one by one and elastically abuts against the first concave-convex surface. When the first swing arm and the second swing arm rotate, the first concave-convex surface rotates relative to the second concave-convex surface to provide rotational damping.

11. The rotating shaft mechanism according to claim 9, characterized in that: The third swing arm and the fourth swing arm are both provided with two protrusions C spaced apart along the axial direction, the protrusions C are provided with through holes for the corresponding side rotation shafts to pass through, and the two opposite surfaces of the two protrusions C are both provided with the first concave-convex surfaces.

12. The rotating shaft mechanism according to claim 10, characterized in that: The elastic damping component includes a first bracket, a second bracket and a first elastic member, and the first elastic member is press-fitted between the first bracket and the second bracket.

13. The rotating shaft mechanism according to claim 9 or 11, characterized in that: The elastic component includes a first elastic component and a second elastic component. The first elastic component is located outside the rotation axis of the first swing arm, and its two ends are supported on the non-hinged ends of the first swing arm and the third swing arm. The second elastic component is located outside the rotation axis of the second swing arm, and its two ends are supported on the non-hinged ends of the second swing arm and the fourth swing arm.

14. The rotating shaft mechanism according to claim 13, characterized in that: The third swing arm is provided with a coaxial first hole at the non-hinged end of the first sub-swing arm and the second sub-swing arm on the same side, the first hole is provided with a first shaft body, and the first elastic component is sleeved on the first shaft body. The fourth swing arm is provided with a coaxial second hole at the non-hinged end of the first sub-swing arm and the second sub-swing arm on the same side, the second hole is provided with a second shaft body, and the second elastic component is sleeved on the second shaft body.

15. The synchronization mechanism according to claim 5, characterized in that: The elastic component includes two first elastic members, which are respectively mounted on the first rotating shaft and the second rotating shaft. At least one end of the first elastic member can be abutted against the concave and convex surface of the swing arm on the corresponding side to provide rotation damping.

16. The synchronization mechanism according to claim 15, characterized in that: The elastic component also includes a bracket, and both sides of the bracket are provided with a second sleeve, and the two second sleeves are respectively sleeved on the first rotating shaft and the second rotating shaft. The two first elastic components are pressed against the swing arms on the corresponding sides through the bracket, and the two second sleeves are matched with the concave and convex surfaces of the corresponding swing arms.

17. The synchronization mechanism according to claim 16, characterized in that: It also includes a third swing arm and a fourth swing arm, which are respectively rotatably connected to both sides of the base; the bracket includes a first bracket and a second bracket located at both ends of the elastic component, the first swing arm and the second swing arm are respectively elastically abutted against the concave and convex surfaces of the second sleeve on both sides of the first bracket, and the third swing arm and the fourth swing arm are respectively elastically abutted against the concave and convex surfaces of the second sleeve on both sides of the second bracket.

18. The rotating shaft mechanism according to any one of claims 1 to 17, characterized in that: One of the two opposite surfaces of the base and the sliding block is provided with a guide rail, and the other is provided with a groove that is slidably matched with the guide rail along the axial direction, and the guide rail and the groove extend along the axial direction.

19. The rotating shaft mechanism according to any one of claims 1 to 18, characterized in that: It also includes a base, and the base is fixedly connected or limit-connected to the base.

20. An electronic device, characterized in that: It comprises a flexible screen and the hinge mechanism described in any one of claims 1-19.

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