Hinge assembly and mobile device

Abstract

The invention relates to the technical field of electronic equipment, and provides a hinge assembly and mobile equipment. The hinge assembly comprises a main support, a rotating assembly and a fixing piece, one end of the rotating assembly is rotationally connected with the main support, the other end of the rotating assembly is rotationally connected with the fixing piece, the rotating assembly comprises a first swing arm, the first swing arm comprises a first main swing arm and a first auxiliary swing arm which are rotationally connected, and the rotating assembly further comprises a second swing arm; the second swing arm and the first swing arm are arranged in a spaced mode, the second swing arm and the first auxiliary swing arm are connected through a connecting piece, and the rotating axis of the first auxiliary swing arm and the rotating axis of the second swing arm on the connecting piece are parallel and do not coincide. According to the hinge assembly, when the first swing arm rotates by the same angle as that of a traditional single virtual swing arm, the needed space in the thickness direction is small, then the thickness of the hinge assembly can be reduced, the rotation angle does not need to be increased, the coincidence amount of the first swing arm and the hinge support can be guaranteed, and the first swing arm is prevented from being disengaged.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to a hinge assembly and a mobile device. Background Art

[0002] In recent years, multi-mode electronic products have become increasingly popular among consumers, and have become a new development trend and new growth point for electronic products. With the continuous development of display technology, foldable display terminals have gradually become a development trend for future mobile electronic products, and the most relevant core technology is hinge technology.

[0003] A hinge generally includes a bracket and a virtual swing arm that rotates relative to the bracket. When the virtual swing arm rotates, it drives the middle frame of the mobile device connected to it to fold. As the thickness of the entire machine becomes thinner and thinner, some products must ensure that they can be rotated to a certain angle to complete folding, and also need to reduce the thickness of the hinge by increasing the rotation angle of the virtual swing arm. However, if the rotation angle is too large, it is easy for the virtual swing arm to detach, affecting product quality. Summary of the invention

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, the present application provides a hinge assembly and a mobile device.

[0005] A first aspect of the present application provides a hinge assembly, comprising a main bracket, a rotating assembly and a fixing member, wherein one end of the rotating assembly is rotatably connected to the main bracket, and the other end is rotatably connected to the fixing member, and the fixing member is used to be connected to a middle frame of a mobile device;

[0006] The rotating assembly comprises first swing arms arranged on both sides of the main support, the first swing arms comprise a first main swing arm and a first auxiliary swing arm which are rotatably connected, one end of the first main swing arm away from the first auxiliary swing arm is rotatably connected to the main support, and one end of the first auxiliary swing arm away from the first main swing arm is rotatably connected to the fixing member;

[0007] The rotating assembly further comprises a second swing arm arranged on both sides of the main bracket, one end of the second swing arm is rotatably connected to the main bracket, and the other end is slidably connected to the fixing member;

[0008] The second swing arm and the first swing arm are arranged at an interval, and the second swing arm and the first auxiliary swing arm are connected by a connecting member, one end of the connecting member is rotationally connected to the second swing arm, and the other end is rotationally connected to the first auxiliary swing arm, wherein the rotation axes of the first auxiliary swing arm and the second swing arm on the connecting member are parallel to each other and do not overlap.

[0009] Optionally, a side of the connecting member close to the first main swing arm is provided with an avoidance opening, and the avoidance opening is used to avoid interference with the connecting member when the first main swing arm rotates.

[0010] Optionally, a hinge bracket is provided on the main bracket, a first guide edge is provided at the end of the first main swing arm, and a first guide groove is provided on the hinge bracket. The first guide edge is rotatably matched with the first guide groove, and when the first main swing arm rotates, the first guide edge is accommodated by the avoidance opening to avoid interference between the first main swing arm and the connecting member.

[0011] Optionally, a stop block is provided on a side of the first main swing arm facing the hinge bracket, and a limiting block is provided on the hinge bracket, and the stop block and the limiting block abut against each other when the hinge assembly is flattened.

[0012] Optionally, a T-shaped slider is provided on the fixing member, and a slide groove is correspondingly provided at one end of the second swing arm away from the main bracket, and the T-shaped slider is slidably matched with the slide groove.

[0013] Optionally, the hinge assembly also includes a synchronization assembly, which includes a first gear and a second gear that are meshed and transmitted, and a gear set is provided at the end of the second swing arm near the main bracket, and the second swing arms on both sides of the main bracket are respectively meshed and transmitted with the first gear and the second gear.

[0014] Optionally, the main support is provided with a fastener and the hinge assembly further includes a damping assembly;

[0015] The damping assembly includes a spring assembly and a third swing arm disposed on both sides of the main bracket, wherein in the length direction of the hinge assembly, the second swing arm and the third swing arm on the same side are connected and the rotation axes coincide with each other;

[0016] The end of the second swing arm close to the main bracket, the spring assembly, the end of the third swing arm close to the main bracket and the fastener are sequentially connected by a rotating shaft;

[0017] The two ends of the spring assembly are respectively connected to the second swing arm and the third swing arm through a cam structure;

[0018] A bent stopper is provided at a position close to the third swing arm and the fastener to achieve a limiting effect on the hinge assembly when it is flattened and fully folded.

[0019] Optionally, two damping assemblies and two rotating assemblies are provided in the length direction of the main support, wherein the two damping assemblies are provided between the two rotating assemblies, wherein in the length direction of the hinge assembly, the rotation axes of the two second swing arms and the two third swing arms on the same side coincide with each other;

[0020] The fastener is provided with two through holes at both ends of the main bracket in the width direction, and the fastener is arranged between the two damping components;

[0021] One of the second swing arms, one of the third swing arms and one of the through holes adjacent to each other in the length direction of the main bracket are sequentially penetrated and connected by one of the rotating shafts;

[0022] The hinge assembly further comprises a U-shaped buckle, and two ends of the U-shaped buckle are respectively provided with a clamping hole, wherein the two clamping holes are respectively clamped to the ends of two adjacent rotating shafts in the length direction of the main bracket;

[0023] A slideway is correspondingly arranged at one end of the third swing arm away from the main bracket, and the slideway is slidably matched with a sliding block arranged on the fixing member.

[0024] Optionally, the hinge assembly further comprises a door panel, on which a first connecting block, a second connecting block and a limit buckle are arranged;

[0025] A limit pin is provided on the first auxiliary swing arm, and a limit slot is provided on the first connecting block, wherein the limit pin and the limit slot are slidably matched;

[0026] The fixing member is provided with a second guide edge and a clamping ring;

[0027] The second connecting block is provided with a second guide groove, and the second guide edge is slidably matched with the second guide groove; the limiting buckle is inserted in the clamping ring.

[0028] A second aspect of the present application provides a mobile device, comprising a middle frame and a hinge assembly as described in any one of the above items, wherein the fixing members on both sides of the hinge assembly are connected to the middle frame.

[0029] Compared with the prior art, the technical solution provided by the embodiments of the present application has the following advantages:

[0030] The hinge assembly and mobile device provided by the present application include a main bracket, a rotating assembly and a fixing member, one end of the rotating assembly is rotatably connected to the main bracket, and the other end is rotatably connected to the fixing member, and the fixing member is used to connect to the middle frame of the mobile device so that the middle frame can rotate relative to the main bracket and realize the folding function. The rotating assembly includes a first swing arm arranged on both sides of the main bracket, the first swing arm includes a first main swing arm and a first auxiliary swing arm that are rotatably connected, one end of the first main swing arm away from the first auxiliary swing arm is rotatably connected to the main bracket, and one end of the first auxiliary swing arm away from the first main swing arm is rotatably connected to the fixing member, that is, the first main swing arm and the first auxiliary swing arm can rotate relative to each other, and the first main swing arm can rotate relative to the main bracket, the rotating assembly also includes a second swing arm arranged on both sides of the main bracket, one end of the second swing arm is rotatably connected to the main bracket, and the other end is slidably connected to the fixing member, the second swing arm and the first swing arm are arranged at an interval, and the second swing arm and the first auxiliary swing arm are connected by a connecting member, one end of the connecting member is rotatably connected to the second swing arm, and the other end It is rotatably connected to the first auxiliary swing arm, wherein the rotation axes of the first auxiliary swing arm and the second swing arm on the connecting piece are parallel to each other and do not overlap, so that the first swing arm and the second swing arm are connected through the connecting piece, and the first swing arm and the second swing arm can rotate at the same time; at the same time, the end of the second swing arm away from the main bracket slides relative to the fixed piece, which can avoid interference with the rotation due to asynchronous rotation of the first swing arm and the second swing arm, and thus can support the hinge assembly to fold, and the multi-stage rotation on two sections of virtual swing arms (i.e., the first main swing arm and the first auxiliary swing arm) replaces the rotational movement of the traditional single virtual swing arm, and a smaller swing arm movement amplitude can be used to achieve rotation to the same angle, and the required space in the thickness direction is reduced, so that the thickness of the hinge assembly can be thinned while the first swing arm rotates a certain angle and meets the folding requirements, without the need to increase the rotation angle to achieve the purpose of thinning, such a setting can ensure the overlap of the first swing arm and the hinge bracket, avoid the first swing arm from falling out, and ensure product performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0032] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0033] Figure 1 This is a schematic structural diagram of a screen side of a mobile device according to an embodiment of the present invention;

[0034] Figure 2It is a structural schematic diagram of the back shell side of a mobile device according to an embodiment of the present invention;

[0035] Figure 3 A schematic diagram of the structure of a mobile device in a folded state according to an embodiment of the present invention;

[0036] Figure 4 It is a structural schematic diagram of a hinge assembly in folding according to an embodiment of the present invention;

[0037] Figure 5 for Figure 4 A partial enlarged view of the middle A part;

[0038] Figure 6 for Figure 4 A partial enlarged view of part B in the middle;

[0039] Figure 7 It is an assembly diagram of a connecting member, a first swing arm and a second swing arm according to an embodiment of the present invention;

[0040] Figure 8 An exploded view of a connecting member, a first swing arm, and a second swing arm according to an embodiment of the present invention;

[0041] Fig. 9 A schematic diagram of the positions of the avoidance opening and the first guide edge when flattened according to an embodiment of the present invention;

[0042] Fig.10 A schematic diagram of the positions of the avoidance opening and the first guide edge when fully folded according to an embodiment of the present invention;

[0043] Fig.11 A schematic diagram of the mechanism of a hinge assembly according to an embodiment of the present invention;

[0044] Fig.12 It is a structural schematic diagram of a first main swing arm according to an embodiment of the present invention;

[0045] Fig.13 A schematic diagram of the position of a first swing arm when flattened according to an embodiment of the present invention;

[0046] Fig.14 A schematic diagram of the position of the second swing arm when flattened according to an embodiment of the present invention;

[0047] Fig.15 This is a schematic diagram of the position of a limit buckle when flattened according to an embodiment of the present invention;

[0048] Fig.16 A schematic diagram of the folded position of the first swing arm according to an embodiment of the present invention;

[0049] Fig.17 is a schematic diagram of the folded position of the second swing arm according to an embodiment of the present invention;

[0050] Fig.18 A schematic diagram of the position of a limit buckle in folding according to an embodiment of the present invention;

[0051] Fig.19 is a schematic diagram of the position of the first swing arm when it is fully folded according to an embodiment of the present invention;

[0052] Fig. 20 is a schematic diagram of the position of the second swing arm when it is fully folded according to an embodiment of the present invention;

[0053] Fig.21 This is a schematic diagram of the position of the limit buckle when it is fully folded according to an embodiment of the present invention;

[0054] Fig. 22 This is a schematic structural diagram of a door panel according to an embodiment of the present invention;

[0055] Fig.23 for Fig. 22 A partial enlarged view of the middle C part;

[0056] Fig.24 It is an assembly diagram of a limiting pin and a limiting groove according to an embodiment of the present invention;

[0057] Fig.25 It is a structural schematic diagram of a hinge bracket according to an embodiment of the present invention;

[0058] Fig.26 It is a structural schematic diagram of a damping assembly according to an embodiment of the present invention;

[0059] Fig. 27 for Fig.26 A partial enlarged view of the middle D part;

[0060] Fig.28 It is a structural schematic diagram of a fastener according to an embodiment of the present invention;

[0061] Fig.29 It is a structural schematic diagram of a spring assembly according to an embodiment of the present invention;

[0062] Fig.30 The figure is a schematic structural diagram of a U-shaped buckle according to an embodiment of the present invention.

[0063] In the figure: 1, main bracket; 2, rotating assembly; 21, first main swing arm; 211, first guide edge; 212, stop block; 22, first auxiliary swing arm; 221, limit pin; 23, second swing arm; 231, slide groove; 232, gear set; 24, connecting piece; 241, avoidance; 3, fixing piece; 31, T-shaped slider; 32, second guide edge; 33, snap ring; 34, sliding block; 4, hinge bracket; 41, first guide groove; 42, limit block ; 5. Synchronizing assembly; 51. First gear; 52. Second gear; 6. Fastener; 61. Through hole; 62. U-shaped buckle; 621. Buckle hole; 7. Damping assembly; 71. Spring assembly; 72. Third swing arm; 721. Slide; 73. Rotating shaft; 74. Cam structure; 75. Stopper; 8. Door panel; 81. First connecting block; 811. Limiting groove; 82. Second connecting block; 821. Second guide groove; 83. Limiting buckle; 9. Middle frame. DETAILED DESCRIPTION

[0064] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0065] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only part of the embodiments of the present application, rather than all of the embodiments.

[0066] The hinge assembly and the mobile device are described in detail below through specific embodiments:

[0067] Reference Figure 1 , Figure 5 and Fig.13 As shown, some embodiments of the present invention provide a hinge assembly, including a main support 1, a rotating assembly 2 and a fixing member 3.

[0068] Among them, one end of the rotating component 2 is rotatably connected to the main bracket 1, and the other end is rotatably connected to the fixing member 3. The fixing member 3 is used to connect to the middle frame 9 of the mobile device so that the middle frame 9 can rotate relative to the main bracket 1 and realize the folding function.

[0069] Specifically, refer to Figure 4 and Figure 5As shown, the rotating assembly 2 includes a first swing arm arranged on both sides of the main bracket 1, and the first swing arm includes a first main swing arm 21 and a first auxiliary swing arm 22 that are rotatably connected. The end of the first main swing arm 21 away from the first auxiliary swing arm 22 is rotatably connected to the main bracket 1, and the end of the first auxiliary swing arm 22 away from the first main swing arm 21 is rotatably connected to the fixing member 3, that is, the first main swing arm 21 and the first auxiliary swing arm 22 can rotate relative to each other, and the first main swing arm 21 can rotate relative to the main bracket 1.

[0070] The rotating assembly 2 also includes a second swing arm 23 arranged on both sides of the main bracket 1, one end of the second swing arm 23 is rotatably connected to the main bracket 1, and the other end is slidably connected to the fixing member 3, the second swing arm 23 and the first swing arm are arranged at an interval, and the second swing arm 23 and the first auxiliary swing arm 22 are connected through a connecting member 24, one end of the connecting member 24 is rotatably connected to the second swing arm 23, and the other end is rotatably connected to the first auxiliary swing arm 22, wherein the rotation axes of the first auxiliary swing arm 22 and the second swing arm 23 on the connecting member 24 are parallel to each other and do not overlap, so that the first swing arm and the second swing arm 23 are connected through the connecting member 24, and the first swing arm and the second swing arm 23 can rotate at the same time; at the same time, the end of the second swing arm 23 away from the main bracket 1 slides relative to the fixing member 3, which can avoid interference with the rotation due to the asynchronous rotation of the first swing arm and the second swing arm 23, thereby supporting the hinge assembly to fold.

[0071] Specifically, refer to Figure 7 and Figure 8 As shown, rotation axes are provided on both sides of the connecting member 24, and the rotation axes on both sides can respectively serve as the rotation axis of the first auxiliary swing arm 22 relative to the connecting member 24 and the rotation axis of the second swing arm 23 relative to the connecting member 24. The two rotation axes are parallel to each other and do not overlap, which can ensure that the first auxiliary swing arm 22 and the second swing arm 23 can swing normally.

[0072] When implementing it, refer to Fig.11 As shown, the multi-stage rotation on two virtual swing arms (i.e., the first main swing arm 21 and the first auxiliary swing arm 22) replaces the rotational movement of the traditional single virtual swing arm. Compared with the traditional single virtual swing arm rotating at the same angle, the two-stage virtual swing arm utilizes the multi-stage rotational freedom to achieve the same angle of rotation with a smaller swing arm movement amplitude. At the same time, the required space in the thickness direction is also reduced. Therefore, while the first swing arm rotates a certain angle and meets the folding requirements, the thickness of the hinge assembly can be thinned without increasing the rotation angle to achieve the purpose of thinning. Such a setting can also ensure the overlap between the first swing arm and the hinge bracket 4, avoid the first swing arm from falling out, and ensure product performance.

[0073] It can be understood that the first main swing arm 21 has a rotational degree of freedom, the first auxiliary swing arm 22 has a rotational degree of freedom, and the second swing arm 23 also has a rotational degree of freedom. The first auxiliary swing arm 22 and the second swing arm 23 are connected by the connecting member 24, which can limit their respective rotational degrees of freedom. Finally, one rotational degree of freedom is retained, so that the first swing arm and the second swing arm 23 can rotate stably and avoid arbitrary swinging. At the same time, because the connecting member 24 limits the rotational freedom of the first auxiliary swing arm 22 and the second swing arm 23, the rotation range of the swing arms on both sides of the hinge assembly when they are folded close is limited, so that the swing arms are not easily detached from the fixing member 3, thereby ensuring the quality of the product.

[0074] It should be noted that the main support 1 is provided with a first swing arm and a second swing arm 23 on both sides, and is connected to a middle frame 9 on both sides. The middle frames 9 on both sides can rotate with the first swing arm and the second swing arm 23 to achieve folding and flattening.

[0075] Specifically, the hinge assembly of the present application has three states: flattened / or unfolded, fully folded, and folded. Figures 13 to 15 As shown, the flattened / unfolded state refers to the position or state when the hinge assembly is fully opened, referring to Figures 19 to 21 As shown, the fully folded state refers to the position or state when the hinge assembly is fully closed, referring to Figures 16 to 18 As shown, the folding state is a state between flattening and fully folding, and the hinge assembly can switch among the three states of flattening / or unfolding, folding and fully folding, so as to drive the fixing member 3 and the middle frame 9 connected to the fixing member 3 to rotate relative to the main bracket 1, and realize the folding function of the mobile device.

[0076] In some embodiments, reference Fig. 9 and Fig.10 As shown, a side of the connecting member 24 close to the first main swing arm 21 is provided with an avoidance opening 241, and the avoidance opening 241 is used to avoid interference with the connecting member 24 when the first main swing arm 21 rotates. Specifically, the connecting member 24 can rotate along with the rotation of the first auxiliary swing arm 22 and the second swing arm 23 to ensure that the first swing arm and the second swing arm 23 can rotate normally. During the rotation of the connecting member 24, the avoidance opening 241 avoids the first main swing arm 21, so that the rotation is smooth.

[0077] When implementing it, refer to Fig.13 As shown, the main support 1 is provided with a hinge support 4, referring to Fig.12 As shown, the end of the first main swing arm 21 is provided with a first guide edge 211, referring to Fig.25 As shown, the hinge bracket 4 is provided with a first guide groove 41, and the first guide edge 211 is rotatably matched with the first guide groove 41, so that the first main swing arm 21 is guided to rotate relative to the hinge bracket 4 through the first guide edge 211, thereby driving the first auxiliary swing arm 22 to rotate. Fig.10 As shown, when the first main swing arm 21 rotates, the first guide edge 211 is accommodated by the avoidance opening 241 to avoid interference between the first main swing arm 21 and the connecting member 24, so that the rotation is smooth.

[0078] In some embodiments, reference Fig.12 As shown, a stop block 212 is provided on the side of the first main swing arm 21 facing the hinge bracket 4, referring to Fig.25 As shown, a limit block 42 is provided on the hinge bracket 4, referring to Fig.13 As shown, the stop block 212 and the limit block 42 abut against each other when the hinge assembly is flattened to prevent the middle frame 9 from being excessively flattened, causing the swing arm to hit the screen and the middle frame to bend, and finally causing damage to the screen, back shell, etc., and the stop block 212 is hidden at the bottom of the first main swing arm 21 and does not affect the flatness of the top surface of the hinge assembly.

[0079] In some embodiments, the top surface of the first main swing arm 21 is formed into two planes with an angle less than 180°. When one of the planes is horizontal, the other plane is relatively sunken, which can avoid the top screen and top mark when the hinge assembly is over-folded.

[0080] In some embodiments, reference Figure 6 As shown, a T-shaped slider 31 is provided on the fixing member 3, and a slide groove 231 is correspondingly provided on the end of the second swing arm 23 away from the main bracket 1. The T-shaped slider 31 slides in cooperation with the slide groove 231 so that the end of the second swing arm 23 away from the main bracket 1 can slide relative to the fixing member 3, thereby avoiding interference with the rotation caused by the asynchronous rotation of the first swing arm and the second swing arm 23, thereby supporting the hinge assembly to be folded.

[0081] In some embodiments, reference Fig.14 As shown, the hinge assembly also includes a synchronization assembly 5, which includes a first gear 51 and a second gear 52 that are meshed and driven, and a gear set 232 is provided at the end of the second swing arm 23 close to the main bracket 1, and the second swing arms 23 on both sides of the main bracket 1 are respectively meshed and driven with the first gear 51 and the second gear 52. It can be understood that the first gear 51 and the second gear 52 are meshed and driven, and when the first gear 51 and the second gear 52 are the same size, the middle frame 9 located on both sides of the hinge assembly can rotate synchronously under the drive of the first gear 51 and the second gear 52, that is, the middle frame 9 on both sides of the hinge assembly can rotate at the same angle and maintain symmetry, thereby preventing any side from rotating too much and causing structural damage.

[0082] In some embodiments, reference Fig.26 and Fig. 27 As shown, the main bracket 1 is provided with a fastener 6 and the hinge assembly also includes a damping assembly 7.

[0083] Specifically, the damping assembly 7 includes a spring assembly 71 and a third swing arm 72 arranged on both sides of the main bracket 1, wherein in the length direction of the hinge assembly, the second swing arm 23 and the third swing arm 72 on the same side are connected and the rotation axes coincide, and under the action of external force, when the second swing arm 23 rotates, it can drive the third swing arm 72 to rotate at the same time, and the end of the second swing arm 23 close to the main bracket 1, the spring assembly 71, the end of the third swing arm 72 close to the main bracket 1 and the fastener 6 are sequentially penetrated and connected by the rotating shaft 73, and the rotating shaft 73 can serve as the rotation axis for the second swing arm 23 and the third swing arm 72 to rotate.

[0084] When implementing it, refer to Fig.26 , Fig. 27 and Fig.29 As shown, the two ends of the spring assembly 71 are respectively connected to the second swing arm 23 and the third swing arm 72 through the cam structure 74, that is, when the second swing arm 23 and the third swing arm 72 rotate, the cam structures 74 on the second swing arm 23 and the third swing arm 72 can rotate relative to the cam structures 74 at both ends of the spring assembly 71, and abut against each other to compress the spring assembly 71. Further, the cam structure 74 includes a plurality of cam teeth arranged at intervals, and a limiting gap is formed between adjacent cam teeth. The cam structures 74 on the second swing arm 23 and the third swing arm 72 and the cam structures 74 at both ends of the spring assembly 71 can be switchably plugged with different limiting gaps during the rotation process, so as to maintain the posture of the second swing arm 23 and the third swing arm 72 through the damping force between the cam structures 74.

[0085] Of course, when the cam structures 74 on the second swing arm 23 and the third swing arm 72 contact the cam structures 74 at both ends of the spring assembly 71 at the inclined surfaces of their respective cam teeth, they can squeeze the spring assembly 71 and generate contact force. As the second swing arm 23 and the third swing arm 72 rotate, the magnitude of the contact force changes accordingly. When the component force of the contact force relative to the two contact surfaces is less than the maximum static friction force, the entire machine is in a suspended state. When the component force is greater than the maximum static friction force, the cam teeth slide against each other and can then rotate to other angles.

[0086] Reference Fig. 27 and Fig.28 As shown, a bent stopper 75 is provided at a position close to the third swing arm 72 and the fastener 6, and the stopper 75 on the third swing arm 72 and the fastener 6 can abut and cooperate to achieve the limiting effect of the hinge assembly when it is flattened and fully folded. Of course, the stopper 75 can also be a structure of other shapes, which is not limited in this application, as long as they can abut and cooperate with each other to limit the rotation angle of the hinge assembly.

[0087] In some embodiments, two damping assemblies 7 and two rotating assemblies 2 are provided in the length direction of the main support 1, wherein the two damping assemblies 7 are provided between the two rotating assemblies 2, i.e., the two damping assemblies 7 are provided adjacent to each other and between the two rotating assemblies 2, which can avoid the movement of parts and can also make the elastic forces of the spring assembly 71 offset each other when it is deformed under pressure, wherein in the length direction of the hinge assembly, the rotation axes of the two second swing arms 23 and the two third swing arms 72 on the same side are coincident with each other. With such a configuration, the spring assemblies 71 are sleeved on the corresponding rotating shafts 73, and when the two second swing arms 23 and the two third swing arms 72 on the same side rotate, the spring assemblies 71 can generate elastic forces on the same axis, and the directions of the elastic forces are opposite, which can make the hinge assembly balanced.

[0088] In a specific implementation, the fastener 6 is provided with two through holes 61 at both ends of the main support 1 in the width direction, and the fastener 6 is arranged between the two damping assemblies 7 to connect the two damping assemblies 7 through the fastener 6 .

[0089] Reference Figure 26 to Figure 28 As shown, a second swing arm 23, a third swing arm 72 and a through hole 61 adjacent in the length direction of the main bracket 1 are sequentially penetrated and connected by a rotating shaft 73, and the two through holes 61 on the fastener 6 are respectively connected to the two rotating components 2 through two rotating shafts 73. Furthermore, the rotating shaft 73 on the fastener 6 and the rotating shaft 73 on the damping component 7 are the same axis to support the rotation of the second swing arm 23 and the third swing arm 72, and to connect the two damping components 7.

[0090] Further, refer to Fig.28 and Fig.30 As shown, the hinge assembly further includes a U-shaped buckle 62, and a clamping hole 621 is respectively provided at both ends of the U-shaped buckle 62, wherein the two clamping holes 621 are respectively clamped to the ends of two adjacent rotating shafts 73 in the length direction of the main bracket 1. It can be understood that the U-shaped buckle 62 is provided with two clamping holes 621, which can be connected to the two rotating shafts 73 accordingly, can save installation space, and ensure connection strength.

[0091] Furthermore, the two clamping holes 621 are symmetrically arranged at intervals, which not only fixes the rotating shaft 73 from moving, but also ensures that the two adjacent rotating shafts 73 can be kept on the same straight line, that is, it ensures that the rotation axes of the two second swing arms 23 and the two third swing arms 72 on the same side are coincident with each other. It can be understood that the U-shaped clamp 62 can also be replaced by clamps of other shapes, as long as it can ensure that the movement of the rotating shaft 73 can be restricted.

[0092] In some embodiments, the U-shaped buckle 62 may also be a buckle with only a single U-shaped hole, and each U-shaped buckle is respectively engaged with the end of each rotating shaft 73 to limit the movement of the rotating shaft 73. It is understandable that the U-shaped buckle may also be replaced by buckles of other shapes, as long as the movement of the rotating shaft 73 can be limited.

[0093] In some embodiments, the through hole 61 on the fastener 6 is fixedly connected to the end of the rotating shaft 73 to ensure that the movement of the rotating shaft 73 can be limited. Figure 6 As shown, a slideway 721 is correspondingly provided at one end of the third swing arm 72 away from the main bracket 1, and the slideway 721 is slidably matched with the sliding block 34 provided on the fixing member 3, so that when the second swing arm 23 rotates together with the third swing arm 72, it can slide relative to the fixing member 3, thereby avoiding interference of the third swing arm 72 with the rotation.

[0094] In some embodiments, reference Figure 3 , Fig. 22 and Fig.23 As shown, the hinge assembly further includes a door panel 8 , on which a first connecting block 81 , a second connecting block 82 and a limiting buckle 83 are provided.

[0095] Specifically, refer to Fig.24 As shown, a limit pin 221 is provided on the first auxiliary swing arm 22, and a limit slot 811 is provided on the first connecting block 81, and the limit pin 221 and the limit slot 811 are slidably matched. Figure 5 As shown, the fixing member 3 is provided with a second guide edge 32, referring to Fig.23 As shown, the second connecting block 82 is provided with a second guide groove 821, the second guide edge 32 is slidably matched with the second guide groove 821, the limiting pin 221 is slidably matched with the limiting groove 811, and the second guide edge 32 is slidably matched with the second guide groove 821 to drive and guide the door panel 8 to rotate. It can be understood that, referring to Fig.21 As shown, when the hinge assembly is fully folded, the door panel 8 and the hinge assembly are finally arranged in a teardrop shape to support the screen to achieve a smooth transition when bending and avoid creases.

[0096] Further, refer to Figure 7 As shown, the fixing member 3 is also provided with a clamping ring 33, and the limiting buckle 83 is inserted into the clamping ring 33. Fig.15 , Fig.18 and Fig.21 As shown, during the opening and closing process of the hinge assembly, the limit buckle 83 is always inserted in the clamp ring 33 to limit the door panel 8. It can be understood that when the hinge assembly is flattened, the limit buckle 83 and the clamp ring 33 abut against each other, thereby preventing the door panel 8 from warping and falling, and ensuring the flatness of the screen.

[0097] Reference Figures 1 to 3As shown, some other embodiments of the present application provide a mobile device, including a middle frame 9 and a hinge assembly as in any of the above embodiments, wherein the fixing members 3 on both sides of the hinge assembly are connected to the middle frame 9 .

[0098] The mobile device provided in the embodiment of the present application includes the hinge assembly of any of the above embodiments, and thus has the beneficial effects of the hinge assembly of any of the above embodiments, which will not be described in detail here.

[0099] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0100] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hinge assembly, characterized in that: It includes a main bracket, a rotating assembly and a fixing member, one end of the rotating assembly is rotatably connected to the main bracket, and the other end is rotatably connected to the fixing member, and the fixing member is used to be connected to the middle frame of the mobile device; The rotating assembly comprises first swing arms arranged on both sides of the main support, the first swing arms comprise a first main swing arm and a first auxiliary swing arm which are rotatably connected, one end of the first main swing arm away from the first auxiliary swing arm is rotatably connected to the main support, and one end of the first auxiliary swing arm away from the first main swing arm is rotatably connected to the fixing member; The rotating assembly further comprises a second swing arm arranged on both sides of the main bracket, one end of the second swing arm is rotatably connected to the main bracket, and the other end is slidably connected to the fixing member; The second swing arm and the first swing arm are arranged at an interval, and the second swing arm and the first auxiliary swing arm are connected by a connecting member, one end of the connecting member is rotationally connected to the second swing arm, and the other end is rotationally connected to the first auxiliary swing arm, wherein the rotation axes of the first auxiliary swing arm and the second swing arm on the connecting member are parallel to each other and do not overlap.

2. The hinge assembly according to claim 1, characterized in that: A side of the connecting member close to the first main swing arm is provided with an avoidance opening, and the avoidance opening is used to avoid interference with the connecting member when the first main swing arm rotates.

3. The hinge assembly according to claim 2, characterized in that: A hinge bracket is provided on the main bracket, a first guide edge is provided at the end of the first main swing arm, and a first guide groove is provided on the hinge bracket. The first guide edge is rotatably matched with the first guide groove. When the first main swing arm rotates, the first guide edge is accommodated by the avoidance opening to avoid interference between the first main swing arm and the connecting member.

4. The hinge assembly according to claim 3, characterized in that: A stop block is arranged on one side of the first main swing arm facing the hinge bracket, and a limit block is arranged on the hinge bracket. The stop block and the limit block abut against each other when the hinge assembly is flattened.

5. The hinge assembly according to any one of claims 1 to 4, characterized in that: The fixing member is provided with a T-shaped slider, and a sliding groove is correspondingly provided at one end of the second swing arm away from the main bracket, and the T-shaped slider is slidably matched with the sliding groove.

6. The hinge assembly according to any one of claims 1 to 4, characterized in that: The hinge assembly also includes a synchronization assembly, which includes a first gear and a second gear that are meshed and transmitted. A gear set is provided at the end of the second swing arm close to the main bracket, and the second swing arms on both sides of the main bracket are respectively meshed and transmitted with the first gear and the second gear.

7. The hinge assembly according to any one of claims 1 to 4, characterized in that: The main support is provided with a fastener and the hinge assembly further includes a damping assembly; The damping assembly includes a spring assembly and a third swing arm disposed on both sides of the main bracket, wherein in the length direction of the hinge assembly, the second swing arm and the third swing arm on the same side are connected and the rotation axes coincide with each other; The end of the second swing arm close to the main bracket, the spring assembly, the end of the third swing arm close to the main bracket and the fastener are sequentially connected by a rotating shaft; The two ends of the spring assembly are respectively connected to the second swing arm and the third swing arm through a cam structure; A bent stopper is provided at a position close to the third swing arm and the fastener to achieve a limiting effect on the hinge assembly when it is flattened and fully folded.

8. The hinge assembly according to claim 7, characterized in that: Two damping assemblies and two rotating assemblies are provided in the length direction of the main support, wherein the two damping assemblies are provided between the two rotating assemblies, wherein in the length direction of the hinge assembly, the rotation axes of the two second swing arms and the two third swing arms on the same side are coincident with each other; The fastener is provided with two through holes at both ends of the main bracket in the width direction, and the fastener is arranged between the two damping components; One of the second swing arms, one of the third swing arms and one of the through holes adjacent to each other in the length direction of the main bracket are sequentially penetrated and connected by one of the rotating shafts; The hinge assembly further comprises a U-shaped buckle, and two ends of the U-shaped buckle are respectively provided with a clamping hole, wherein the two clamping holes are respectively clamped to the ends of two adjacent rotating shafts in the length direction of the main bracket; A slideway is correspondingly arranged at one end of the third swing arm away from the main bracket, and the slideway is slidably matched with a sliding block arranged on the fixing member.

9. The hinge assembly according to any one of claims 1 to 4, characterized in that: The hinge assembly also includes a door panel, on which a first connecting block, a second connecting block and a limit buckle are arranged; A limit pin is provided on the first auxiliary swing arm, and a limit slot is provided on the first connecting block, wherein the limit pin and the limit slot are slidably matched; The fixing member is provided with a second guide edge and a clamping ring; The second connecting block is provided with a second guide groove, and the second guide edge is slidably matched with the second guide groove; the limiting buckle is inserted in the clamping ring.

10. A mobile device, characterized in that: It comprises a middle frame and a hinge assembly as claimed in any one of claims 1 to 9, wherein the fixing members on both sides of the hinge assembly are connected to the middle frame.

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