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, the processing technology is simple, the cost is low, the occupied space in the thickness direction of the mobile phones is small in the mode that the spiral faces and the abutting parts are matched and axially slide, and the light and thin design requirements of the electronic equipment such as the mobile phones are met.

Description

Synchronous mechanism, rotating shaft mechanism and electronic equipment

[0001] This application claims priority to 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

[0002] 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

[0003] The two side shells of the electronic device are connected to a rotating shaft mechanism, which realizes the relative folding and unfolding of the two shells. The rotating shaft mechanism includes a first swing arm and a second swing arm, which are respectively connected to the two shells. When the two swing arms rotate, they drive the shells to fold and unfold. In order to make the two swing arms swing synchronously, the rotating shaft mechanism is equipped with a synchronization mechanism. The current synchronization mechanisms mainly have the following forms: gear assemblies, worm gear structures and rack and pinion structures, all of which achieve synchronization of the two side swing arms through meshing teeth. In order to ensure the strength of the meshing teeth, the sizes of the gears and turbines are of the minimum size. Therefore, 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.

[0004] 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, wherein the first swing arm and the second swing arm are both rotatably connected to the base; the slider is arranged to slide along an axis 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 an abutment portion that cooperates with 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 part. When the first swing arm and the second swing arm rotate, the spiral surface and the abutting part 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 faces of the slider, the spiral surface in the present application is formed on the end face of the slider. 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 axial sliding of the spiral surface and the abutment part occupies a relatively small space in the thickness direction of the mobile phone, meeting the requirements of lightweight and thin 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 against each other, that is, the elastic component is in a compressed state along the axial direction. In this way, the elastic component can make the spiral surface and the abutment part 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.

[0010] In one example, the first and second swing arms are both split structures, each comprising a first sub-swing arm and a second sub-swing arm capable of synchronous rotation, the first sub-swing arm and the second sub-swing arm being capable of relative axial movement, and at least one of the first sub-swing arm and the second sub-swing arm having a raised portion. In this example, the split structure of the first and second swing arms facilitates the placement of elastic components and increases flexibility in 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 both provided with abutment portions, and 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 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, a third swing arm and a fourth swing arm are further included, which are rotatably connected to both sides of the base, and elastic components are press-fitted 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 further 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 one-to-one to the first concave-convex surface 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, and both sides of the first bracket and the second bracket have a second sleeve, and 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. 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 there are second sleeves on both sides of the bracket. The two second sleeves are respectively sleeved on the first rotating shaft and the second rotating shaft. The two 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.

[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-hinge 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 with the guide rail in the axial direction, and the guide rail and the groove extend in the axial direction.

[0028] In a second aspect, the present application further provides a rotating shaft mechanism, comprising a base and any one 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 comprising 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] FIG1 is a schematic diagram of a rotating shaft mechanism provided by an embodiment of the present application applied to an electronic device;

[0032] FIG2 is an exploded schematic diagram of the electronic device shown in FIG1 ;

[0033] FIG3 is a partial schematic diagram of the assembled rotating shaft mechanism and the main body in FIG2 ;

[0034] FIG4 is a three-dimensional schematic diagram of the synchronization mechanism in the first example of the present application;

[0035] FIG5 is a front view of the synchronization mechanism in FIG4;

[0036] FIG6 is an exploded schematic diagram of the synchronization mechanism shown in FIG4 ;

[0037] FIG7 is a three-dimensional schematic diagram of the slider in FIG4 ;

[0038] FIG8 is a three-dimensional schematic diagram of the first swing arm in FIG4 ;

[0039] FIG9 is a three-dimensional schematic diagram of the first bracket in FIG4 ;

[0040] FIG10 is a schematic diagram of the first mounting block constituting the base in FIG4 ;

[0041] FIG11 is a three-dimensional schematic diagram of a synchronization mechanism in a second example of the present application;

[0042] FIG12 is a three-dimensional schematic diagram of the first swing arm in FIG11 ;

[0043] Figure 13 is a three-dimensional schematic diagram of the slider in Figure 11;

[0044] FIG14 is a three-dimensional schematic diagram of a synchronization mechanism in a third example of the present application;

[0045] FIG15 is a schematic front view of FIG14;

[0046] FIG16 is a three-dimensional schematic diagram of the first swing arm in FIG14 ;

[0047] FIG17 is a three-dimensional schematic diagram of a synchronization mechanism in a fourth example of the present application;

[0048] FIG18 is an exploded schematic diagram of the first sub-swing arm and the second sub-swing arm in FIG17 ;

[0049] FIG19 is an exploded schematic diagram of the synchronization mechanism shown in FIG17;

[0050] FIG20 is a schematic structural diagram of the synchronization mechanism in the fifth example of the present application. DETAILED DESCRIPTION

[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, specific direction structure and operation. Therefore, they cannot be understood as limiting the present invention.

[0052] In the following, the terms "first," "second," etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Thus, a feature 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 with reference to the accompanying drawings and specific embodiments.

[0054] The hinge mechanism provided in the embodiments of the present application can be applied to electronic devices, where the electronic devices can be mobile terminals such as mobile phones, tablet computers, tablet computer accessories, wearable devices, vehicle-mounted devices, augmented reality (AR) / virtual reality (VR) devices, laptop computers, ultra-mobile personal computers (UMPCs), netbooks, personal digital assistants (PDAs), etc., or can also be professional shooting equipment such as digital cameras, SLR cameras / micro-single cameras, sports cameras, gimbal cameras, drones, etc. The embodiments of the present application do not limit the specific type of electronic devices. For ease of understanding, the following description takes the mobile phone as an example.

[0055] Please refer to Figures 1 to 3, Figure 1 is a schematic diagram of the hinge mechanism provided in an embodiment of the present application applied to an electronic device; Figure 2 is a decomposed schematic diagram of the electronic device shown in Figure 1; Figure 3 is a partial schematic diagram of the hinge mechanism and the main body in Figure 2 after assembly; the central axis X is identified in Figure 2, and the horizontal center line Y is identified in Figure 3.

[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 a specific description. The following text will continue to introduce the technical solution and technical effects with the main body 200 as the middle frame.

[0057] At least a portion of the flexible screen 300 can be supported on and connected to the middle frame. During the relative folding and unfolding of the two middle frames, the flexible screen 300 is simultaneously in the folded and unfolded state. The structures of the left and right middle frames can be identical or different. The specific structures of the two middle frames can be tailored 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 adopt 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 and plays a role in protecting the display module. The transparent cover plate may be a glass cover plate, or of course it may be other transparent materials that can play a protective role.

[0059] Please refer to Figure 3. In the embodiment of the present application, the hinge mechanism 100 includes a base (not shown in the figure) and a synchronization mechanism. Among them, A in Figure 3 is the installation position of the synchronization mechanism. The base mainly provides an installation basis for other components that make up the hinge mechanism. The base can be an integrated structure, or it can be 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 Figures 4 and 5. Figure 4 is a three-dimensional schematic diagram of the synchronization mechanism in the first example of the embodiment of the present application; Figure 5 is a front view of the synchronization mechanism in Figure 4.

[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 rotation axis 5, a second rotation axis 6, a first swing arm 1, and a second swing arm 2. The base 7 can be integrally formed with the base, that is, the base 7 is part of the base. Of course, the base 7 and the base can also be two independent components, fixedly connected by a fixing member or other fixing method (such as welding, screw connection, etc.). As can be seen from Figures 2 and 3, the rotating shaft mechanism 100 is arranged with two sets of synchronization mechanisms, respectively near the two ends along the axis of the rotating 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 herein. That is, the rotating shaft mechanism can also include two or more sets of synchronization mechanisms. Referring 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 centerline Y. In addition to the synchronization mechanisms, the rotating shaft mechanism of the embodiment of the present application also includes two sets of end main swing arms 9 and an intermediate main swing arm 10. The two sets of end main swing arms 9 are arranged adjacent to the two sets of synchronization mechanisms, and the two sets of end main swing arms 9 are also symmetrically arranged about the transverse centerline 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 mounted 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 limitation of the first rotating shaft 5 and the second rotating shaft 6 relative to the base 7 can be achieved by a limiting member, which can be a nut or a locking pin or other components.

[0064] In the embodiment of the present application, the first swing arm 1 and the second swing arm 2 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 about 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 relative to the central axis X of the base, with the first rotation axis 5 and the second rotation axis 6 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 different.

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

[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 relative to each other. In the embodiment of the present application, the swing arm fixed to the main body is defined as the main swing arm. Of course, the first swing arm 1 and the second swing arm 2 can also be relatively movable with 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 rotation. In the embodiment of the present application, this type of swing arm is defined as the auxiliary swing arm. As shown in Figure 4, the first swing arm 1 and the second swing arm 2 can both be provided with an oblong through hole 1a. The main swing arm is fixed with a shaft (not shown in Figure 4, refer to Figure 17 for understanding). The shaft is inserted into the oblong through hole 1a. In this way, during the rotation of the main body and the main swing arm, the first swing arm 1 and the second swing arm 2 will rotate accordingly and slide along the length of the oblong through hole 1a with the shaft. For example, the end main swing arm 9 can be fixed with a shaft to drive the swing arm in the adjacent synchronization mechanism to move in conjunction.

[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 parts are 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 and the main body of the synchronization mechanism in the embodiment of the present application is not limited, as long as the first swing arm 1 and the second swing arm 2 are linked to the middle frame. For example, the shaft can be fixed to the auxiliary swing arm, the main swing arm is provided with an oblong through-hole 1a, or the main and auxiliary swing arms are linked by the cooperation of a protrusion and a 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 FIG. 6 and FIG. 7 , FIG. 6 is an exploded schematic diagram of the synchronization mechanism shown in FIG. 4 ; FIG. 7 is a three-dimensional schematic diagram of the slider in FIG. 4 .

[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. 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 raised portion, and there may be two or more raised portions. The raised portions may be provided with through holes 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 raised portions provided thereon.

[0072] Please refer to Figure 4. In 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 spiral surfaces that cooperate with the abutment portions on the corresponding sides. Through the cooperation of the spiral 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. In theory, the spiral surfaces on the two end faces of the slider 3 are always in abutment with the abutment portions on the corresponding sides. Due to the limitation of the stroke of the slider 3, the spiral surface can be only a small section of the spiral structure, and the projection in the plane perpendicular to the axial direction can be a ring structure. The central angle of the ring structure can be from 0 (excluding the endpoint value) to 360 degrees (including the endpoint value). Figure 7 shows a specific example of a ring structure with a central angle of approximately 180 degrees. The processing of the ring structure is relatively easy when the central angle of the ring structure 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, and can be other numbers.

[0074] From the above, it can be understood that compared with the spiral groove formed on the main body between the two end faces of the slider 3, the spiral surface in the embodiment of the present application is formed on the end face 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 part cooperate with the axial sliding method to occupy a relatively small space in the thickness direction of the mobile phone, meeting the design requirements of lightweight and thin electronic devices such as mobile phones.

[0075] While the above describes a specific example of providing a helical surface on the end surface of the slider 3, those skilled in the art will appreciate that the aforementioned technical effects can also be achieved by providing a helical surface on the end surface of the first protrusion 11 and abutting portions on the end surface of the slider 3. Specifically, the end surface of one of the first protrusion 11 and the slider 3 can be provided with a helical surface, while the end surface of the other can be provided with abutting portions that cooperate with the helical surface.

[0076] Several specific examples are described below using the example of providing a spiral surface on the slider 3.

[0077] Please refer to Figures 4, 7, and 8 for further understanding. Figure 8 is a three-dimensional schematic diagram of the first swing arm 1 in Figure 4. In the first example, both end surfaces of the first sleeve 31 on either side of the slider 3 have helical surfaces. There are two first protrusions 11, spaced axially apart, and both have coaxial through-holes. The first rotation shaft 5 passes through the through-hole of the first protrusion 11 on the left side of the first swing arm 1, and the second rotation shaft 6 passes through the through-hole of the first protrusion 11 on the right side of the second swing arm 2. Opposing surfaces of the two first protrusions 11 are provided with first abutment portions 111 and second abutment portions 111', respectively, for mating with the helical surfaces on both end surfaces of the first sleeve 31. As shown in Figures 7 and 8, the first helical surface 311 on the upper end surface of the slider 3 abuts against the first abutment portion 111 provided on the end surface of the first protrusion 11, while the second helical surface 311' on the lower end surface of the slider 3 abuts against the second abutment portion 111' provided on the end surface of the other first protrusion 11.

[0078] The first swing arm 1 and the second swing arm 2 rotate synchronously under the cooperation between 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', are always in abutment with each other, the distance between the first abutting portion 111 and the second abutting portion 111' should be approximately 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 should be approximately 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 spiral surface and the abutment portion may not abut against each other during rotation after the synchronization mechanism is assembled. Therefore, the embodiment of the present application also makes the following arrangements.

[0081] Please refer to Figures 11, 14 and 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 spiral 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 spiral 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 can be a spring or other elastic component, such as silicone or rubber. As shown in FIG4 , there can be two elastic components, 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 elastic components can also be one, or any other number.

[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 Figures 11, 12 and 13. Figure 11 is a three-dimensional schematic diagram of the synchronization mechanism in the second example of the embodiment of the present application; Figure 12 is a three-dimensional schematic diagram of the first swing arm in Figure 11; and Figure 13 is a three-dimensional schematic diagram of the slider in Figure 11.

[0085] In the second example, only one end face of the slider 3 is provided with a spiral surface. Accordingly, the number of first protrusions 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 an abutment portion. 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, which is spaced apart from the first protrusion 11. The elastic component 20 is press-fitted between the slider 3 and the second protrusion 12. Specifically, the elastic component can be press-fitted between the other end face of the slider 3 and the second protrusion 12. Specifically, the end face of the slider 3 opposite the second protrusion 12 can be a flat structure, and of course, further structures such as an elastic component mounting seat can also be 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 conjunction 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, Figure 14 is a three-dimensional schematic diagram of the synchronization mechanism in the third example of the embodiment of the present application; Figure 15 is a front view schematic diagram of Figure 14; Figure 16 is a three-dimensional schematic diagram of the first swing arm in Figure 14.

[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 faces 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. The difference is that two sliders 3 are provided in this example, and the elastic component is pressed between the two sliders 3. Accordingly, two first protrusions 11 arranged at intervals 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 portions 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 the different matching position structures between the slider 3 and the swing arm (the first swing arm 1 or the second swing arm 2 ), and the other structures of the synchronization mechanism can be substantially the same.

[0094] Please further refer to Figures 6 and 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. In this way, 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, it can be said that the above-mentioned technical effect can be achieved by providing a groove on the base 7 and a guide rail on the slider 3 that matches the groove.

[0096] To improve the feel of the electronic device when folding and unfolding, the synchronization mechanism may be further provided with a damping device 4 for providing rotational damping to the first swing arm 1 and the second swing arm 2. The damping device 4 is directly mounted 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 circumferentially limited to the base 7 and can expand and contract axially. That is, the elastic damping component can expand and contract relative to the base 7 in the axial direction, but is circumferentially constrained to prevent relative rotation between the two components. The first swing arm 1 and the second swing arm 2 each have a first convex-concave surface. The elastic damping component has a second convex-concave surface that corresponds one-to-one with the first convex-concave surface and elastically abuts against it. The first convex-concave surface 1b and the second convex-concave surface 4a both have wavy surfaces that smoothly transition along the circumference. The degree of undulation between the concave and convex surfaces of the wavy surfaces can be appropriately selected based on the damping required by the electronic device. During rotation of the first and second swing arms 1 and 2, the friction generated by the relative sliding of the first convex-concave surface 1b against the second convex-concave surface and the elastic abutment provides rotational damping. When the highest points of the first and second convex-concave surfaces contact, the friction is relatively high, enabling a hovering function.

[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 protrusions 13 are provided with through holes for the corresponding side rotation shafts to pass through. The first rotation shaft 5 passes through the through hole of the third protrusion 13 of the left first swing arm 1, and the second rotation shaft 6 is located in the through hole of the third protrusion 13 of the right second swing arm 2. In combination with the above description, the first rotation shaft 5 is simultaneously provided inside the through holes of each protrusion on the same side (the first protrusion 11, the second protrusion 12 and the third protrusion 13) to achieve a rotational 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 shaft, and the structure is compact.

[0099] Please refer to Figure 9. Accordingly, the four ends of the elastic damping component can also have a sleeve structure, which is defined as the second sleeve 441 in this article. The third sleeve is provided with a second convex and concave surface at the end corresponding to 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 press-fitted between the first bracket 43 and the second bracket 44. Both sides of the first bracket 43 and the second bracket 44 have a second sleeve 441 with a through hole 4a. The second sleeves 441 on both sides are respectively sleeved on the first rotating shaft 5 and the second rotating shaft 6. In other words, 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. In this way, 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, there can be two first elastic members 41, which are respectively sleeved on the first rotating shaft 5 and the second rotating shaft 6. Each second sleeve 441 has a second convex and concave surface at an end away from the first elastic member 41. The first rotating shaft 5 and the second rotating shaft 6 can respectively serve as guides for the extension 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 between the first convex-concave surface 1b and the second convex-concave surface 4a, the greater the rotational damping. To improve the rotational damping of the damping device 4, a second elastic member 42 may be further added. The second elastic member 42 may be disposed between the two first elastic members 41. Meanwhile, supports for mounting the second elastic member 42 may be provided on opposing sides of the first bracket 43 and the second bracket 44. As shown in FIG9 , the first bracket 43 and the second bracket 44 are provided with guide rods, and the second elastic member 42 is fitted onto the guide rods.

[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. Of course, it can also be arranged separately, between the other swing arms of the rotating shaft mechanism, that is, relatively independent of the synchronization mechanism, as shown in Figure 17.

[0108] Please refer to Figures 17 to 19, Figure 17 is a three-dimensional schematic diagram of the synchronization mechanism in the fourth example of the embodiment of the present application; Figure 18 is a decomposed schematic diagram of the first sub-swing arm 1-1 and the second sub-swing arm 1-2 in Figure 17; Figure 19 is a decomposed schematic diagram of the synchronization mechanism shown in Figure 17.

[0109] In a fourth example, the first and second swing arms 1 and 2 each 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 and second sub-swing arms 1-1 and 1-2 are two independent components that can move relative to each other along the axial direction. The amount of movement can be determined based on the actual electronic device. Furthermore, the first and second sub-swing arms 1-1 and 1-2 are constrained circumferentially to ensure synchronous rotation. The first and second sub-swing arms 1-1 and 1-2 are constrained against relative rotation by a constraining member. The constraining member can be a groove and protrusion structure. For example, one of the first and second sub-swing arms 1-1 and 1-2 can be provided with a groove 1c, and the other can be provided with a protrusion 1-21 that is inserted into the groove 1c to restrict circumferential rotation of the two. The groove 1c and the protrusion 1-21 can be provided at the non-articulated ends of the first and second sub-swing arms 1-1 and 1-2. Of course, the circumferential constraint method of the first and second sub-swing arms 1-1 and 1-2 is not limited to the above method, and can also be other methods, such as a snap-fit ​​method.

[0110] Both the first sub-swing arm 1-1 and the second sub-swing arm 1-2 have raised portions. In this example, the raised portion of the first sub-swing arm 1-1 is defined as raised portion A1-11, and the raised portion of the second sub-swing arm 1-2 is defined as raised portion B1-12. These definitions are provided solely for clarity and brevity in describing the technical solution. The structures of the raised portions A1-11 and B1-12 can be identical to the first raised portions 11 described in the first through third examples. Unlike the first example, where the two first raised portions 11 that abut the slider 3 are located on the same swing arm, the raised portions in this example are located on both sub-swing arms. The slider 3 is positioned between the raised portions A1-11 and B1-12 on the same side. Under the action of the elastic component, the two axially aligned end surfaces of the slider 3 elastically abut against the raised portions A1-11 and 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] Slider 3 is located between protrusions A1-11 and B1-12. The end surfaces of slider 3 can be provided with helical surfaces. Protrusions A1-11 and B1-12 are smooth surfaces capable of sliding along the helical surfaces, such as arc-shaped surfaces or short helical sections. The figure shows helical surfaces on both end surfaces of slider 3, with abutment portions provided on the corresponding end surfaces of protrusions A1-11 and B1-12.

[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 a swing arm into two parts, which can also reduce the processing technology of the swing arm.

[0114] The above describes an example in which helical surfaces are provided at both ends of the slider 3, and both 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 will appreciate that the aforementioned technical effects can also be achieved by providing a helical surface on one side of the slider 3, with only one of the first sub-swing arm 1-1 and the second sub-swing arm 1-2 provided with a raised portion. Of course, the aforementioned technical effects can also be achieved by providing an abutment portion on the slider 3, with the end faces of the raised portions of the first sub-swing arm 1-1 and the second sub-swing arm 1-2 being positioned on the helical surface that mates with the abutment portion. These technical details are not elaborated herein.

[0115] In this example, the base 7 can also be provided with a first rotation axis 5 and a second rotation axis 6, which are arranged 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 examples.

[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 fitted with 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 end surface 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. Two different installation methods are given below.

[0120] Please refer to Figure 17 again. Based on the fourth example, the synchronization mechanism can further include a third swing arm 3-1 and a fourth swing arm 3-2, which are respectively rotatably connected to the two 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 are arranged in sequence along the axial direction. An elastic component is press-fitted between the first swing arm 1 and the third swing arm 3-1, and an elastic component is press-fitted between the fourth swing arm 3-2 and the second swing arm 2. The elastic component can 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, serve 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] As shown in FIG17 , 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. The first shaft 3-3 is also provided inside the oblong through hole 1a of each swing arm. When the main body rotates, the first shaft 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 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 each swing arm are not limited to the oblong through-holes 1a, and may also be of other structures. For example, the left swing arm has a first hole, and the right swing arms have second holes. The first shaft extends through the first holes to achieve synchronous rotation of the left swing arms, and the second shaft extends 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 structure of the synchronization mechanism is relatively compact.

[0125] The first elastic component is located outside the rotation axis of the first swing arm 1, with its ends supported by the non-rotating ends of the first swing arm 1 and the third swing arm 3-1. The second elastic component is located outside the rotation axis of the second swing arm 2, with its ends supported by the non-hinged ends of the second swing arm 2 and the fourth swing arm 3-2. Placing the first and second elastic components at the outer ends, away from the rotation axis of each swing arm, provides relatively large space and greater design flexibility.

[0126] The first elastic component 201 can apply an elastic force toward the second sub-swing arm 1-2 to the left first sub-swing arm 1-1 to push the first sub-swing arm 1-1 toward the second sub-swing arm 1-2, thereby making the abutting portion (upper abutting 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 abutting portion 111 (lower abutting 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 their corresponding abutting portions.

[0128] In this example, in order to improve the feel of folding and unfolding 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. Figures 17 to 19 show the specific structure of the damping device 4 installed between the third swing arm 3-1 and the fourth swing arm 3-2. The damping device 4 includes an elastic damping component that is circumferentially limited to the base 7 and can be extended and retracted along the axial direction. The third swing arm 3-1 and the fourth swing arm 3-2 both have a first convex-concave surface 1b. 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 raised portions C3-11, and the raised portions C3-11 are provided with through holes for the corresponding side rotating shafts to pass through, and the two opposite surfaces of the two raised portions 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 part of the damping device 4 are designed as an integrated structure, that is, the elastic part in the damping device 4 can not only play the function of rotational damping, but also play the function of making the abutting part and the spiral surface abut against each other. The specific structure of the synchronous structure is as follows.

[0132] Please refer to Figure 20, which is a structural diagram 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 to the base 7, and the second elastic member 42 is circumferentially limited to the base 7. At least one end of the first elastic member 41 and the second elastic member 42 can abut against the convex or concave surface of the corresponding swing arm to provide rotational damping. Figure 20 shows an 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 or concave surface of the elastic member that is convex and concave and fits the convex or concave surface of the elastic member. In other words, the first elastic member 41 cannot rotate circumferentially relative to the base 7, and the second elastic member 42 cannot rotate circumferentially relative to the base 7. Therefore, when each swing arm rotates relative to the base 7, the first elastic member 41 abuts against the convex or concave surface of at least one end of the swing arm, generating frictional damping between the two to meet the user's hand feel requirements.

[0134] In this example, the elastic component includes a bracket with a second sleeve on each side. The two second sleeves are respectively mounted on the first rotation axis 5 and the second rotation axis 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 rotational 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 rotating shaft mechanism, or the contact force between the abutting portion and the spiral surface, the elastic component further includes a second elastic member 42, which is located between the two first elastic members 41. A support for mounting the second elastic member 42 is further provided on the opposite side of the first bracket 43 and the second bracket 44. The support may 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 extends through the non-hinged end of each swing arm located on the left side of the base 7, and the second shaft 3-4 extends through the non-hinged end of each swing arm located on the right side of the base 7. For details about the first shaft 3-3, the second shaft 3-4, and the structure of each swing arm mounting the first and second shafts, please refer to the above.

[0138] Those skilled in the art will appreciate that the configuration of the elastic component includes, but is not limited to, the following two methods. For example, the elastic component may not be disposed on the first shaft 3-3 or the second shaft 3-4, but rather on the opposing end surfaces of the first sub-swing arm 1-1 and the second sub-swing arm 1-2, with the elastic component mounted on the spring mounting seat. Similarly, in this example, the base 7 and the slider 3 may also be provided with guide rails 712 and grooves 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 therefore also has the above technical effects of the hinge mechanism 100.

[0140] The principles and implementation methods of the embodiments of the present application are described using specific examples. The description of the above examples 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 synchronization mechanism, characterized in that: The invention 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 arranged to slide 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, 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 an abutment portion that cooperates with the corresponding spiral surface; 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.

2. The synchronization mechanism according to claim 1, wherein: 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.

3. The synchronization mechanism according to claim 2, wherein: The first sub-swing arm is provided with a protrusion A, and the second sub-swing arm is provided with a protrusion B. The corresponding end faces of the protrusion A and the protrusion B are both provided with the 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 faces of the slider arranged along the axial direction elastically abut against the protrusion A and the protrusion B on the same side respectively.

4. The synchronization mechanism according to claim 3, wherein: 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.

5. The synchronization mechanism according to claim 4, 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.

6. The synchronization mechanism according to claim 5, characterized in that: A first sleeve is provided on both sides of the slider, and the first sleeves on both sides are respectively slidably sleeved on the first rotating shaft and the second rotating shaft. Both end faces of each first sleeve have the spiral surface, which respectively cooperates with the abutment portion of the protrusion A and the abutment portion of the protrusion B.

7. The synchronization mechanism according to claim 5 or 6, 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. The protrusion and the groove cooperate to achieve synchronous rotation of the first sub-swing arm and the second sub-swing arm.

8. The synchronization mechanism according to claim 5, wherein: It also includes a third swing arm and a fourth swing arm, which are rotatably connected to both sides of the base respectively. The elastic component is press-fitted between the third swing arm and the first swing arm, and between the fourth swing arm and the second swing arm.

9. The synchronization mechanism according to claim 8, characterized in that: It also includes a damping device, 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. The elastic damping component has a second concave-convex surface that corresponds one-to-one to the first concave-convex surface 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.

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

11. The synchronization mechanism according to claim 10, wherein: The elastic damping component includes a first bracket, a second bracket and a first elastic member. Both the first bracket and the second bracket have a second sleeve on both sides. 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. The end of each second sleeve away from the first elastic member is provided with the second concave-convex surface.

12. The synchronization mechanism according to any one of claims 8 to 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.

13. The synchronization mechanism according to claim 12, wherein: 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.

14. The synchronization mechanism according to claim 8, wherein: 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. 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.

15. The synchronization mechanism according to claim 14, wherein: 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 elastic components are pressed 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.

16. The synchronization mechanism according to claim 15, wherein: 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 respectively, 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 respectively.

17. The synchronization mechanism according to claim 11 or 16, characterized in that: The elastic component further includes a second elastic member, which is located between the two first elastic members. Supports for mounting the second elastic member are further provided on opposite sides of the first bracket and the second bracket.

18. The synchronization mechanism according to any one of claims 1 to 6, 8 to 11, and 14 to 16, characterized in that: It also includes a shaft body that passes through the non-hinge 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.

19. The synchronization mechanism according to any one of claims 1 to 6, 8 to 11, and 14 to 16, 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 slides with the guide rail in the axial direction, and the guide rail and the groove extend in the axial direction.

20. A rotating shaft mechanism, characterized in that: It comprises a base and the synchronization mechanism according to any one of claims 1 to 19, wherein the base is fixedly connected or position-limitedly connected to the base.

21. An electronic device, characterized in that: It comprises a flexible screen and the hinge mechanism described in claim 20.

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