Hinge mechanism and electronic device

Abstract

The invention discloses a hinge mechanism and electronic equipment, and relates to the technical field of hinges, and the hinge mechanism comprises a base, a first swing arm, a second swing arm, a synchronous sliding block and a cam seat; the first swing arm and the second swing arm are arranged on the two sides of the base correspondingly and rotationally connected with the base through shaft parts located on the same side of the base correspondingly. The synchronous sliding block is connected with the first swing arm and the second swing arm. The synchronous sliding block, the first swing arm and the second swing arm can slide in the axial direction of the shaft part. The cam seat is arranged on the base, the first swing arm and the second swing arm are respectively provided with a cam part, and the cam seat and the cam parts are in contact and can rotate relatively; under the condition that the first swing arm rotates relative to the base, the cam seat is used for pushing the first swing arm to slide in the axial direction of the shaft part, and the first swing arm drives the second swing arm to slide synchronously through the synchronous sliding block, so that the second swing arm rotates synchronously with the first swing arm under the action of the cam seat.

Description

Technical Field

[0001] The present application relates to the field of hinge technology, and in particular to a hinge mechanism and an electronic device. Background Art

[0002] With the rapid development of electronic devices, in pursuit of large-screen display experience and convenience of carrying, foldable devices such as foldable screen mobile phones, tablets and computers are becoming the first choice of most users.

[0003] In the related art, foldable electronic devices rely on the meshing of gear sets to achieve synchronous folding or synchronous unfolding. However, since adjacent gears are meshed through teeth, and there is a tooth gap between the meshing teeth, that is, there is a certain fitting tolerance, then the foldable electronic device is prone to shaking during the folding or unfolding process, resulting in poor transmission stability, which in turn leads to poor stability of the foldable electronic device. Summary of the invention

[0004] The present application discloses a hinge mechanism and an electronic device to solve the problem in the related art that a foldable electronic device relies on the meshing of a gear set to achieve synchronous folding or synchronous unfolding, and has poor stability.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application discloses a hinge mechanism, wherein the hinge mechanism includes a base, a first swing arm, a second swing arm, a synchronous slider and a cam seat;

[0007] The first swing arm and the second swing arm are respectively arranged on two sides of the base, and are rotatably connected to the base through shafts located on the same side of the base;

[0008] The synchronous slider is connected to the first swing arm and the second swing arm respectively, and the synchronous slider, the first swing arm and the second swing arm can slide along the axial direction of the shaft;

[0009] The cam seat is arranged on the base, the first swing arm and the second swing arm are respectively provided with a cam portion, and the cam seat contacts the cam portion and can rotate relatively;

[0010] When the first swing arm rotates relative to the base, the cam seat is used to push the first swing arm to slide axially along the shaft portion, and the first swing arm drives the second swing arm to slide synchronously through the synchronous slider, so that the second swing arm rotates synchronously with the first swing arm under the action of the cam seat.

[0011] In a second aspect, embodiments of the present application disclose an electronic device, which includes a first device body, a second device body, and the hinge mechanism described above. The first device body is connected to the second device body through the hinge mechanism;

[0012] During the relative rotation of the first device body and the second device body, the electronic device switches between an unfolded state and a folded state.

[0013] The technical solution adopted by the present application can achieve the following technical effects:

[0014] The hinge mechanism disclosed in the embodiments of the present application improves related technologies. The hinge mechanism includes a base, a first swing arm, a second swing arm, a synchronous slider, and a cam seat. The first swing arm and the second swing arm are respectively arranged on both sides of the base and are respectively rotatably connected to the base through shaft parts located on the same side of the base; the synchronous slider is respectively connected to the first swing arm and the second swing arm, and the synchronous slider, the first swing arm, and the second swing arm can slide along the axial direction of the shaft part; the cam seat is arranged on the base, and the first swing arm and the second swing arm are respectively provided with cam parts, and the cam seat contacts the cam parts and can rotate relatively; when the first swing arm rotates relative to the base, the cam seat can push the first swing arm to slide along the axial direction of the shaft part, and the first swing arm drives the second swing arm to slide synchronously through the synchronous slider. Under the cooperation of the cam seat and the cam parts, the second swing arm can rotate synchronously with the first swing arm around the base while sliding. With the above hinge mechanism, the structure is simple, and there is no need to rely on the complex meshing of gear sets to achieve the synchronous opening and closing of the hinge mechanism, avoiding the problem of asynchronous opening and closing of the hinge mechanism caused by the manufacturing precision and mating tolerance of the gear sets, thereby improving the synchronism and stability of the hinge mechanism. Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of the hinge mechanism disclosed in an embodiment of the present application;

[0016] Figure 2 is a second schematic structural diagram of the hinge mechanism disclosed in an embodiment of the present application;

[0017] Figure 3 is a third schematic structural diagram of the hinge mechanism disclosed in an embodiment of the present application;

[0018] Figure 4 is a fourth schematic structural diagram of the hinge mechanism disclosed in an embodiment of the present application;

[0019] Figure 5 is a fifth schematic structural diagram of the hinge mechanism disclosed in an embodiment of the present application;

[0020] Figure 6 is a sixth schematic structural diagram of the hinge mechanism disclosed in an embodiment of the present application;

[0021] Figure 7 Schematic structural diagram of the electronic device disclosed in the embodiment of the present application in a folded state;

[0022] Figure 8 Schematic structural diagram of the electronic device disclosed in the embodiment of the present application in an unfolded state.

[0023] Explanation of reference numerals:

[0024] 100 - hinge mechanism, 110 - base, 111 - shaft part, 1111 - first rotating shaft, 1112 - second rotating shaft, 112 - limiting groove, 120 - first swing arm, 121 - first avoidance groove, 130 - second swing arm, 131 - second avoidance groove, 140 - synchronous slider, 141 - slider body, 142 - first connecting part, 143 - second connecting part, 150 - cam seat, 151 - first cam seat, 1511 - first sub - cam seat, 1512 - second sub - cam seat, 152 - second cam seat, 1521 - third sub - cam seat, 1522 - fourth sub - cam seat, 160 - cam part, 161 - first cam part, 1611 - first sub - cam part, 1612 - second sub - cam part, 162 - second cam part, 1621 - third sub - cam part, 1622 - fourth sub - cam part, 170 - first frame connecting piece, 171 - first sliding groove, 180 - second frame connecting piece, 181 - second sliding groove, 190 - third swing arm, 191 - third cam part, 200 - fourth swing arm, 201 - fifth cam part, 210 - first sliding piece, 220 - second sliding piece, 230 - first elastic piece, 240 - second elastic piece, 250 - synchronous connecting piece;

[0025] 300 - electronic device, 310 - first device body, 320 - second device body. Detailed implementation manners

[0026] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0027] The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of this application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually of the same category, and the number of objects is not limited. For example, the first object can be one or more.

[0028] The following will, with reference to the accompanying drawings, elaborate on the technical solutions disclosed in each embodiment of this application.

[0029] Please refer to Figures 1 to 8 , an embodiment of this application discloses a hinge mechanism 100, and the disclosed hinge mechanism 100 may include a base 110, a first swing arm 120, a second swing arm 130, a synchronous slider 140, and a cam base 150;

[0030] Among them, the base 110 serves as the installation foundation for the first swing arm 120 and the second swing arm 130. The first swing arm 120 and the second swing arm 130 are respectively disposed on both sides of the base 110 and are rotatably connected to the base 110. Specifically, a shaft portion 111 is provided on the base 110, and the shaft portion 111 can be respectively disposed on both sides of the base 110. The first swing arm 120 and the second swing arm 130 are respectively rotatably connected to the base 110 through the shaft portion 111 on the same side of the base 110. It can be understood that, in the absence of interference from other components, the first swing arm 120 can rotate independently around the shaft portion 111 disposed on the same side as the first swing arm 120, and the second swing arm 130 can rotate independently around the shaft portion 111 disposed on the same side as the second swing arm 130.

[0031] The first swing arm 120 and the second swing arm 130 can be synchronous swing arms for controlling the synchronous rotation of the structures on both sides of the base 110. It should be noted that the structures on both sides of the base 110 may include a frame connector and the housing of the electronic device 300. Among them, the housing includes two parts of the housing located on both sides of the base 110. The first swing arm 120 and the second swing arm 130 are respectively connected to the housing on the same side through the frame connector on the same side, and drive the two parts of the housing to switch between the folded state and the unfolded state. The synchronism of the rotation between the first swing arm 120 and the second swing arm 130 is crucial for the synchronism and stability of the operation of the structures on both sides of the base 110.

[0032] In order to ensure the synchronization of the movement between the first swing arm 120 and the second swing arm 130, a synchronization slider 140 can be arranged on the base 110, and the synchronization slider 140 is respectively connected to the first swing arm 120 and the second swing arm 130, and can be assembled by welding, clamping, etc. For example, the two ends of the synchronization slider 140 can be respectively arranged on the shaft 111, and connected to the first swing arm 120 and the second swing arm 130 by clamping; or, the two ends of the synchronization slider 140 can also be directly connected to the first swing arm 120 and the second swing arm 130, and fixed by welding. Under the action of the synchronization slider 140, the synchronization slider 140, the first swing arm 120 and the second swing arm 130 can slide synchronously along the axial direction of the shaft 111.

[0033] A cam seat 150 is also provided on the base 110, and the cam seat 150 is relatively fixed to the base 110. The first swing arm 120 and the second swing arm 130 are respectively provided with a cam portion 160. The cam seat 150 is in contact with the cam portion 160 and can rotate relative to each other. It should be noted that when the first swing arm 120 or the second swing arm 130 rotates relative to the base 110, the cam portion 160 will be driven to rotate relative to the cam seat 150. The cam seat 150 and the cam portion 160 can be matched through an inclined surface or a curved surface. When the cam portion 160 rotates relative to the cam seat 150, the interference between the inclined surfaces or the curved surfaces is utilized to provide the cam portion 160 with an axial driving force along the shaft portion 111, thereby driving the first swing arm 120 or the second swing arm 130 to slide along the axial direction of the shaft portion 111.

[0034] When the first swing arm 120 rotates relative to the base 110, the cam seat 150 and the base 110 remain relatively still. The cam seat 150 uses the cam portion 160 provided on the first swing arm 120 to push the first swing arm 120 to slide axially along the shaft portion 111. During the sliding of the first swing arm 120, the second swing arm 130 is driven to slide synchronously through the synchronous slider 140. During the sliding of the second swing arm 130, the cam portion 160 provided on the second swing arm 130 will also interfere with the cam seat 150, so that the second swing arm 130 rotates synchronously with the first swing arm 120 relative to the base 110 under the action of the cam seat 150.

[0035] As can be seen from the above, the hinge mechanism 100 disclosed in the embodiments of the present application improves the related art. By using the synchronous slider 140, the synchronous sliding of the first swing arm 120 and the second swing arm 130 can be achieved. Then, by utilizing the interference between the cam seat 150 and the cam portion 160, the synchronous rotation of the first swing arm 120 and the second swing arm 130 can be realized. The structure is simple and there is no need to rely on the complex gear set meshing method to achieve the synchronous opening and closing of the hinge mechanism 100, avoiding the problem of asynchronous opening and closing of the hinge mechanism 100 caused by the manufacturing precision and mating tolerance of the gear set, thereby improving the synchronism and stability of the hinge mechanism 100. At the same time, since there are less likely to be problems of deformation and wear between the cam seat 150 and the cam portion 160, compared with the gear set meshing method, the durability of the hinge mechanism 100 can also be improved to a certain extent.

[0036] In some alternative embodiments, as Figures 1 to 4 shown, the shaft portion 111 may include a first rotating shaft 1111 and a second rotating shaft 1112. The first rotating shaft 1111 and the second rotating shaft 1112 are parallel to each other and are respectively provided on both sides of the base 110. The first swing arm 120 is rotatably connected to the base 110 through the first rotating shaft 1111, and the second swing arm 130 is rotatably connected to the base 110 through the second rotating shaft 1112. The cam seat 150 includes a first cam seat 151 provided on the first rotating shaft 1111 and a second cam seat 152 provided on the second rotating shaft 1112. The first cam seat 151 and the second cam seat 152 may be an integral structure or may be respectively fixed on the base 110. The first rotating shaft 1111 and the second rotating shaft 1112 may respectively pass through the first cam seat 151 and the second cam seat 152. On the sides of the first cam seat 151 and the second cam seat 152 facing the cam portion 160, inclined surfaces or curved surfaces are respectively provided.

[0037] The cam portion 160 includes a first cam portion 161 and a second cam portion 162. The first cam portion 161 is provided on the first swing arm 120. The first cam portion 161 may be a cylindrical structure, sleeved on the first rotating shaft 1111, and in contact with the first cam seat 151 and capable of relative movement. The first cam portion 161 and the first swing arm 120 may be an integral structure or the first cam portion 161 and the first swing arm 120 may be respectively manufactured and then assembled by means of welding, bonding, etc. On the side of the first cam portion 161 facing the first cam seat 151, an inclined surface or a curved surface is provided. By utilizing the interference between the first cam portion 161 and the first cam seat 151, the first swing arm 120 can slide along the axial direction of the first rotating shaft 1111 and at the same time can rotate relative to the base 110 around the axial direction of the first rotating shaft 1111.

[0038] The second cam portion 162 is provided on the second swing arm 130. The second cam portion 162 is also of a cylindrical structure, sleeved on the second rotating shaft 1112, and in contact with the second cam seat 152 and capable of relative movement. The second cam portion 162 and the second swing arm 130 can be of an integral structure, or the second cam portion 162 and the second swing arm 130 can be separately manufactured and then assembled by welding, bonding or other means. A slope or a curved surface is provided on the side of the second cam portion 162 facing the second cam seat 152. By using the interference between the second cam portion 162 and the second cam seat 152, the second swing arm 130 can slide along the axial direction of the second rotating shaft 1112 and can also rotate relative to the base 110 around the axial direction of the second rotating shaft 1112.

[0039] When the first swing arm 120 rotates relative to the base 110, the first cam seat 151 remains relatively stationary with respect to the base 110. The first cam seat 151 pushes the first swing arm 120 to slide along the axial direction of the first rotating shaft 1111 through the first cam portion 161. During the sliding process of the first swing arm 120, the second swing arm 130 is driven to slide synchronously through the synchronous slider 140. During the sliding process of the second swing arm 130, interference occurs between the second cam portion 162 and the second cam seat 152, so that the second swing arm 130 rotates synchronously with the first swing arm 120 relative to the base 110 under the action of the second cam seat 152.

[0040] It should be noted that the number of the first cam seats 151 or the second cam seats 152 can be one or two. Exemplarily, when the number of the first cam seats 151 and the second cam seats 152 is one respectively, the number of the first cam portions 161 and the second cam portions 162 is also one respectively, and the first cam seat 151 and the first cam portion 161 are provided on the same side of the first swing arm 120, and the second cam seat 152 and the second cam portion 162 are provided on the same side of the second swing arm 130.

[0041] When the number of the first cam seats 151 or the second cam seats 152 is two respectively, the two first cam seats 151 can be respectively arranged on both sides of the first swing arm 120 along the axial direction of the first rotating shaft 1111, and the two second cam seats 152 can be respectively arranged on both sides of the second swing arm 130 along the axial direction of the second rotating shaft 1112. Correspondingly, the number of the first cam portions 161 or the second cam portions 162 is also two, and the two first cam portions 161 can be respectively arranged on both sides of the first swing arm 120 along the axial direction of the first rotating shaft 1111, and the two second cam portions 162 can be respectively arranged on both sides of the second swing arm 130 along the axial direction of the second rotating shaft 1112.

[0042] Further, as Figures 1 to 4As shown, when the number of the first cam seat 151, the second cam seat 152, the first cam portion 161, and the second cam portion 162 is two respectively, the specific solution is as follows. Along the axial direction of the shaft portion 111, the first swing arm 120 includes a first side and a second side opposite to each other, and the second swing arm 130 includes a third side and a fourth side opposite to each other, wherein the first side and the third side are on the same side of the first swing arm 120 and the second swing arm 130, and the second side and the fourth side are on the same side of the first swing arm 120 and the second swing arm 130.

[0043] The first cam portion 161 may include a first sub-cam portion 1611 and a second sub-cam portion 1612. Correspondingly, the first cam seat 151 includes a first sub-cam seat 1511 and a second sub-cam seat 1512. The first sub-cam seat 1511 and the first sub-cam portion 1611 are provided on the first side of the first swing arm 120, and the first sub-cam seat 1511 and the first sub-cam portion 1611 are in contact and can move relative to each other; the second sub-cam seat 1512 and the second sub-cam portion 1612 are provided on the second side of the first swing arm 120, and the second sub-cam seat 1512 and the second sub-cam portion 1612 are in contact and can move relative to each other.

[0044] The second cam portion 162 may include a third sub-cam portion 1621 and a fourth sub-cam portion 1622. Correspondingly, the second cam seat 152 includes a third sub-cam seat 1521 and a fourth sub-cam seat 1522. The third sub-cam seat 1521 and the third sub-cam portion 1621 are provided on the third side of the second swing arm 130, and the third sub-cam seat 1521 and the third sub-cam portion 1621 are in contact and can move relative to each other. The fourth sub-cam seat 1522 and the fourth sub-cam portion 1622 are provided on the fourth side of the second swing arm 130, and the fourth sub-cam seat 1522 and the fourth sub-cam portion 1622 can move relative to each other.

[0045] When the first swing arm 120 rotates relative to the base 110, the first sub-cam seat 1511 remains relatively stationary with respect to the base 110. The first sub-cam seat 1511 pushes the first swing arm 120 to slide along the axial direction of the first rotating shaft 1111 through the first sub-cam portion 1611. During the sliding process of the first swing arm 120, the first sub-cam seat 1511 and the first sub-cam portion 1611 move away from each other, and the interference effect weakens, while the second sub-cam seat 1512 and the second sub-cam portion 1612 move closer to each other, and the interference effect strengthens. Thus, the sliding and rotating processes of the first swing arm 120 can be controlled from both sides of the first swing arm 120, improving the stability of the first swing arm 120.

[0046] During the sliding process of the first swing arm 120, the second swing arm 130 is driven to slide synchronously through the synchronous slider 140. During the sliding process of the second swing arm 130, the third sub-cam seat 1521 and the third sub-cam portion 1621 move away from each other, the interference effect weakens, the fourth sub-cam seat 1522 and the fourth sub-cam portion 1622 move closer to each other, and the interference effect strengthens, thereby improving the stability of the second swing arm 130. At the same time, the synchronism of the movement of the first swing arm 120 and the second swing arm 130 is also improved.

[0047] In some alternative embodiments, when the numbers of the first cam seat 151, the second cam seat 152, the first cam portion 161, and the second cam portion 162 are each one, the specific solution is as follows. The first cam portion 161 and the first cam seat 151 can be arranged on the same side of the first swing arm 120, and the second cam portion 162 and the second cam seat 152 are arranged on the side of the second swing arm 130 facing away from the first cam seat 151. It can be understood that the first cam portion 161 and the first cam seat 151, and the second cam portion 162 and the second cam seat 152 are arranged diagonally on the base 110.

[0048] Taking the folding process of the hinge mechanism 100 as an example, when the first swing arm 120 rotates relative to the base 110, the first cam seat 151 remains relatively stationary with respect to the base 110. The first cam seat 151 pushes the first swing arm 120 to slide along the axial direction of the first rotating shaft 1111 through the first cam portion 161. During the sliding process of the first swing arm 120, the first cam seat 151 and the first cam portion 161 move away from each other. During the sliding process of the first swing arm 120, the second swing arm 130 is driven to slide synchronously through the synchronous slider 140. At this time, the second cam portion 162 and the second cam seat 152 move closer to each other, causing interference, and driving the second swing arm 130 to rotate relative to the base 110.

[0049] For the unfolding process of the hinge mechanism 100, the interference between the second cam portion 162 and the second cam seat 152 can be used to first push the second swing arm 130 to slide. The second cam portion 162 and the second cam seat 152 move away from each other, and then the first swing arm 120 is driven to slide through the synchronous slider 140. The first cam seat 151 and the first cam portion 161 move closer to each other, causing interference, and driving the first swing arm 120 to rotate relative to the base 110. It should be noted that the sliding directions of the first swing arm 120 and the second swing arm 130 during the unfolding process are opposite to those during the folding process.

[0050] Adopting the above solution in which the first cam portion 161 and the first cam seat 151, and the second cam portion 162 and the second cam seat 152 are arranged diagonally on the base 110 simplifies the structure of the hinge mechanism 100 and reduces the weight of the hinge mechanism 100 on the basis of ensuring the synchronous folding and synchronous unfolding of the hinge mechanism 100.

[0051] In addition, for the solution where the numbers of the first cam seat 151, the second cam seat 152, the first cam portion 161, and the second cam portion 162 are each one, and when the first cam seat 151 and the first cam portion 161, and the second cam seat 152 and the second cam portion 162 are located on the same side, there will be a problem that the synchronous folding and synchronous unfolding of the hinge mechanism 100 cannot be achieved simultaneously. To address this problem, an elastic member such as a spring, a silica gel member, a rubber member, etc. can be provided on the side of the first swing arm 120 and the second swing arm 130 where no cam seat 150 and cam portion 160 are provided. The elastic member can provide elastic support in the sliding direction of the first swing arm 120 and the second swing arm 130. Under the elastic force of the elastic member, an interference state can be maintained between the first cam seat 151 and the first cam portion 161, and between the second cam seat 152 and the second cam portion 162, so as to provide a driving force for the rotation and sliding of the first swing arm 120 and the second swing arm 130.

[0052] Furthermore, as Figures 1 to 4 shown, the cooperation between the cam seat 150 and the cam portion 160 can be a bevel surface fit or a curved surface fit. In the embodiment of the present application, a first helical surface can be provided on the cam seat 150. Specifically, the first helical surface can be provided on the first cam seat 151, the second cam seat 152, the first sub-cam seat 1511, the second sub-cam seat 1512, the third sub-cam seat 1521, and the fourth sub-cam seat 1522; a second helical surface can be provided on the cam portion 160. Specifically, the second helical surface can be provided on the first cam portion 161, the second cam portion 162, the first sub-cam portion 1611, the second sub-cam portion 1612, the third sub-cam portion 1621, and the fourth sub-cam portion 1622.

[0053] The first helical surface and the second helical surface can be complementarily arranged. The first helical surface and the second helical surface gradually change in a spiral shape along the axial direction of the shaft portion 111. In the state where the first helical surface and the second helical surface are completely attached, the cam seat 150 and the cam portion 160 can be buckled into a cylinder; when the cam seat 150 and the cam portion 160 rotate relative to each other, the first helical surface and the second helical surface interfere with each other, driving the cam seat 150 and the cam portion 160 to approach or move away from each other relatively. Similarly, when the cam seat 150 and the cam portion 160 approach or move away from each other relatively, the interference between the first helical surface and the second helical surface will also cause the cam seat 150 and the cam portion 160 to rotate relative to each other. By utilizing the cooperation between the first helical surface and the second helical surface, the synchronous rotation and sliding of the first swing arm 120 and the second swing arm 130 can be achieved.

[0054] Furthermore, as Figures 1 to 4As shown in the figure, the synchronization slider 140 may include a slider body 141, a first connection portion 142 and a second connection portion 143 provided at both ends of the slider body 141. The slider body 141, the first connection portion 142 and the second connection portion 143 may be of an integral structure, or may be manufactured separately and then assembled together by means of welding, snap connection, etc. The first connection portion 142 may be of a sleeve structure, sleeved on the first rotating shaft 1111 and slidably connected to the first rotating shaft 1111. The second connection portion 143 has the same structure as the first connection portion 142. The second connection portion 143 is sleeved on the second rotating shaft 1112 and slidably connected to the second rotating shaft 1112. Under the limiting action of the first connection portion 142 and the second connection portion 143, the synchronization slider 140 can slide stably along the axial direction of the shaft portion 111.

[0055] The first swing arm 120 is provided with a first avoidance groove 121. At least a part of the first connection portion 142 is located in the first avoidance groove 121. The first avoidance groove 121 limits the first connection portion 142. When the first swing arm 120 slides along the axial direction of the shaft portion 111, the groove wall of the first avoidance groove 121 will drive the synchronization slider 140 to slide through the first connection portion 142. The second swing arm 130 is provided with a second avoidance groove 131. At least a part of the second connection portion 143 is located in the second avoidance groove 131. When the second swing arm 130 slides along the axial direction of the shaft portion 111, the groove wall of the second avoidance groove 131 will drive the synchronization slider 140 to slide through the second connection portion 143. Thus, the synchronous sliding of the synchronization slider 140, the first swing arm 120 and the second swing arm 130 is realized.

[0056] Further, as Figures 1 to 4 shown, a limiting groove 112 is provided on the base 110. The extending direction of the limiting groove 112 is consistent with the sliding direction of the synchronization slider 140. At least a part of the slider body 141 is arranged in the limiting groove 112 and is slidably connected to the limiting groove 112. By using the limiting action of the limiting groove 112, the problems of shaking, skewing and jamming of the synchronization slider 140 during sliding can be reduced, thereby improving the stability of the hinge mechanism 100.

[0057] In some alternative embodiments, as Figures 1 to 6 shown, the hinge mechanism 100 may further include a first frame connecting member 170 and a second frame connecting member 180. The first frame connecting member 170 and the second frame connecting member 180 are respectively used to connect two parts of the housing of the electronic device 300. The first swing arm 120 is movably connected to the first frame connecting member 170, and the second swing arm 130 is movably connected to the second frame connecting member 180.

[0058] Since the first swing arm 120 and the second swing arm 130 require axial sliding of the shaft portion 111, in order to avoid interference between the first swing arm 120 and the first housing connecting member 170, and between the second swing arm 130 and the second housing connecting member 180, which may hinder the sliding of the first swing arm 120 and the second swing arm 130, a first sliding groove 171 can be provided in the first housing connecting member 170, and a second sliding groove 181 can be provided in the second housing connecting member 180. At least a part of the first swing arm 120 is located in the first sliding groove 171 and is slidably connected to the first sliding groove 171. At least a part of the second swing arm 130 is located in the second sliding groove 181 and is slidably connected to the second sliding groove 181, thereby reducing interference.

[0059] In addition, the first sliding groove 171 and the second sliding groove 181 can also respectively play a certain limiting role on the first swing arm 120 and the second swing arm 130, avoiding problems such as shaking, deflection, and jamming of the first swing arm 120 and the second swing arm 130.

[0060] In some alternative embodiments, as Figures 5 to 6 shown, the hinge mechanism 100 may further include a third swing arm 190, a fourth swing arm 200, a first sliding member 210, a second sliding member 220, a first elastic member 230, and a second elastic member 240. The third swing arm 190 and the fourth swing arm 200 are respectively arranged on both sides of the base 110. The third swing arm 190 is rotatably connected to the base 110 through a first rotating shaft 1111, and the fourth swing arm 200 is rotatably connected to the base 110 through a second rotating shaft 1112. The driving forces of the third swing arm 190 and the fourth swing arm 200 come from the first housing connecting member 170 and the second housing connecting member 180. The first sliding member 210 and the second sliding member 220 can be of a sleeve structure, and the first elastic member 230 and the second elastic member 240 can be structures such as springs, silicone parts, rubber parts, etc. that can store elastic potential energy.

[0061] Both the first sliding member 210 and the first elastic member 230 are sleeved on the first rotating shaft 1111, and both ends of the first elastic member 230 respectively abut against the end of the first rotating shaft 1111 and the first sliding member 210. Specifically, a shaft sleeve can be provided at the end of the first rotating shaft 1111, and the shaft sleeve is used to abut against the first elastic member 230.

[0062] Both the second sliding member 220 and the second elastic member 240 are sleeved on the second rotating shaft 1112, and both ends of the second elastic member 240 respectively abut against the end of the second rotating shaft 1112 and the second sliding member 220. A shaft sleeve can also be provided at the end of the second rotating shaft 1112, and the shaft sleeve is used to abut against the second elastic member 240.

[0063] The third swing arm 190 is provided with a third cam portion 191. On one side of the first slider 210 facing the third swing arm 190, a fourth cam portion 160 is provided. The fourth swing arm 200 is provided with a fifth cam portion 201. On one side of the second slider 220 facing the fourth swing arm 200, a sixth cam portion 160 is provided. During the rotation of the third swing arm 190 and the fourth swing arm 200 relative to the base 110, the third swing arm 190 drives the first slider 210 to move towards the first elastic member 230 and compress the first elastic member 230 through the relative sliding of the third cam portion 191 and the fourth cam portion 160. The fourth swing arm 200 drives the second slider 220 to move towards the second elastic member 240 and compress the second elastic member 240 through the relative sliding of the fifth cam portion 201 and the sixth cam portion 160.

[0064] The elastic potential energy of the first elastic member 230 and the second elastic member 240 in the compressed state increases, which will increase the frictional force between the first elastic member 230 and the second elastic member 240 and the base 110, thereby achieving the damping effect.

[0065] In the embodiment of the present application, the first swing arm 120 and the second swing arm 130 for controlling the synchronization of the hinge mechanism 100 and the third swing arm 190 and the fourth swing arm 200 for controlling the damping of the hinge mechanism 100 move independently of each other and do not affect each other, so as to reduce the interference between the synchronization process and the damping process of the hinge mechanism 100. When a deviation occurs in the synchronization process of the hinge mechanism 100, the deviation will not be accumulated to the damping process, thereby improving the damping effect of the hinge mechanism 100.

[0066] Further, as Figures 5 to 6 shown, the hinge mechanism 100 further includes a synchronization connecting member 250. The synchronization connecting member 250 is respectively connected to the first slider 210 and the second slider 220 to enable the first slider 210 and the second slider 220 to move synchronously, so that the compression amounts of the first elastic member 230 and the second elastic member 240 are kept consistent, improving the consistency of the damping of the hinge mechanism 100. The synchronization connecting member 250 and the first slider 210 and the second slider 220 can be of an integral structure, or can be manufactured separately and then assembled together by welding, clamping and other methods.

[0067] Please refer to Figures 7 to 8 , the embodiment of the present application also discloses an electronic device 300. The disclosed electronic device 300 can be a mobile phone, a tablet computer, an e-book reader, a game console, a wearable device, etc. with a folding function. The embodiment of the present application does not limit the specific type of the electronic device 300.

[0068] The electronic device 300 may include a first device body 310, a second device body 320, and the hinge mechanism 100 in the above embodiment, and the first device body 310 is connected to the second device body 320 through the hinge mechanism 100. During the relative rotation of the first device body 310 and the second device body 320, the electronic device 300 switches between the unfolded state and the folded state.

[0069] Since the electronic device 300 adopts the hinge mechanism 100, the synchronous slider 140 can be used to make the first swing arm 120 and the second swing arm 130 slide synchronously, and then the interference between the cam seat 150 and the cam part 160 can be used to achieve the synchronous rotation of the first swing arm 120 and the second swing arm 130. The structure is simple, and there is no need to rely on a complex gear set meshing method to achieve the folding and unfolding of the electronic device 300, avoiding the problem of asynchronous opening and closing of the hinge mechanism 100 due to the manufacturing accuracy and matching tolerance of the gear set, thereby improving the synchronization and stability of the electronic device 300 when folding and unfolding. At the same time, since the cam seat 150 and the cam part 160 are not prone to deformation and wear, compared with the gear set meshing method, the durability of the electronic device 300 can also be improved to a certain extent.

[0070] The above embodiments of the present application focus on describing the differences between the various embodiments. As long as the different technical features between the various embodiments are not contradictory, they can be combined to form more specific embodiments. Considering the simplicity of the text, they will not be repeated here.

[0071] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A hinge mechanism, characterized in that, It includes a base, a first swing arm, a second swing arm, a synchronous slider and a cam seat; The first swing arm and the second swing arm are respectively arranged on both sides of the base, and are respectively rotationally connected to the base through shaft parts on the same side of the base; The synchronous slider is respectively connected to the first swing arm and the second swing arm, and the synchronous slider, the first swing arm and the second swing arm can slide axially along the shaft part; The cam seat is arranged on the base, the first swing arm and the second swing arm are respectively provided with cam parts, and the cam seat contacts the cam parts and can rotate relatively; When the first swing arm rotates relative to the base, the cam seat is used to push the first swing arm to slide axially along the shaft part, and the first swing arm drives the second swing arm to slide synchronously through the synchronous slider, so that the second swing arm rotates synchronously with the first swing arm under the action of the cam seat.

2. The hinge mechanism according to claim 1, wherein The shaft part includes a first rotating shaft and a second rotating shaft, the first rotating shaft and the second rotating shaft are respectively arranged on both sides of the base, the first swing arm is rotationally connected to the base through the first rotating shaft, and the second swing arm is rotationally connected to the base through the second rotating shaft; The cam seat includes a first cam seat arranged on the first rotating shaft and a second cam seat arranged on the second rotating shaft, the cam part includes a first cam part and a second cam part, the first cam part is arranged on the first swing arm and contacts the first cam seat and can move relatively, and the second cam part is arranged on the second swing arm and contacts the second cam seat and can move relatively; When the first swing arm rotates relative to the base, the first cam seat is used to push the first swing arm to slide axially along the shaft part, and the first swing arm drives the second swing arm to slide synchronously through the synchronous slider, so that the second swing arm rotates synchronously with the first swing arm under the action of the second cam seat.

3. The hinge mechanism according to claim 2, wherein, Axially along the shaft part, the first swing arm includes a first side and a second side facing away from each other, and the second swing arm includes a third side and a fourth side facing away from each other; The first cam part includes a first sub-cam part and a second sub-cam part, the first cam seat includes a first sub-cam seat and a second sub-cam seat, the first sub-cam seat and the first sub-cam part are arranged on the first side, and the second sub-cam seat and the second sub-cam part are arranged on the second side; The second cam part includes a third sub-cam part and a fourth sub-cam part, the second cam seat includes a third sub-cam seat and a fourth sub-cam seat, the third sub-cam seat and the third sub-cam part are arranged on the third side, and the fourth sub-cam seat and the fourth sub-cam part are arranged on the fourth side.

4. The hinge mechanism according to claim 2, wherein The first cam part and the first cam seat are arranged on the same side of the first swing arm, and the second cam part and the second cam seat are arranged on the side of the second swing arm facing away from the first cam seat.

5. The hinge mechanism according to any one of claims 1, characterized in that, The cam seat is provided with a first spiral surface, and the cam part is provided with a second spiral surface, and the first spiral surface and the second spiral surface contact and can move relatively.

6. The hinge mechanism according to claim 2, wherein, The synchronous slider includes a slider body, a first connecting portion and a second connecting portion provided at both ends of the slider body. The first connecting portion is sleeved on the first rotating shaft and is slidably connected to the first rotating shaft. The second connecting portion is sleeved on the second rotating shaft and is slidably connected to the second rotating shaft; The first swing arm is provided with a first avoidance groove. At least a part of the first connecting portion is located in the first avoidance groove. The second swing arm is provided with a second avoidance groove. At least a part of the second connecting portion is located in the second avoidance groove.

7. The hinge mechanism according to claim 6, characterized in that, The base is provided with a limiting groove. At least a part of the slider body is arranged in the limiting groove and is slidably connected to the limiting groove.

8. The hinge mechanism according to claim 1, characterized in that, The hinge mechanism further includes a first frame connecting member and a second frame connecting member. The first swing arm is movably connected to the first frame connecting member. The second swing arm is movably connected to the second frame connecting member; The first frame connecting member is provided with a first sliding groove. The second frame connecting member is provided with a second sliding groove. At least a part of the first swing arm is located in the first sliding groove and is slidably connected to the first sliding groove. At least a part of the second swing arm is located in the second sliding groove and is slidably connected to the second sliding groove.

9. The hinge mechanism according to claim 2, wherein, The hinge mechanism further includes a third swing arm, a fourth swing arm, a first sliding member, a second sliding member, a first elastic member and a second elastic member; The third swing arm and the fourth swing arm are respectively arranged on both sides of the base. The third swing arm is rotatably connected to the base through the first rotating shaft. The fourth swing arm is rotatably connected to the base through the second rotating shaft; The first sliding member and the first elastic member are both sleeved on the first rotating shaft. Both ends of the first elastic member are respectively abutted against the end of the first rotating shaft and the first sliding member. The second sliding member and the second elastic member are both sleeved on the second rotating shaft. Both ends of the second elastic member are respectively abutted against the end of the second rotating shaft and the second sliding member; The third swing arm is provided with a third cam portion. A fourth cam portion is provided on one side of the first sliding member facing the third swing arm. The fourth swing arm is provided with a fifth cam portion. A sixth cam portion is provided on one side of the second sliding member facing the fourth swing arm; During the rotation of the third swing arm and the fourth swing arm relative to the base, the third swing arm drives the first sliding member to move towards the first elastic member and compress the first elastic member through the relative sliding of the third cam portion and the fourth cam portion. The fourth swing arm drives the second sliding member to move towards the second elastic member and compress the second elastic member through the relative sliding of the fifth cam portion and the sixth cam portion.

10. The hinge mechanism according to claim 9, wherein, The hinge mechanism further includes a synchronous connecting member. The synchronous connecting member is respectively connected to the first sliding member and the second sliding member to enable the first sliding member and the second sliding member to move synchronously.

11. An electronic device, characterized in that, It includes a first device body, a second device body, and the hinge mechanism according to any one of claims 1-10. The first device body is connected to the second device body through the hinge mechanism; During the relative rotation of the first device body and the second device body, the electronic device switches between the unfolded state and the folded state.

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