Hinge assembly and electronic equipment

Abstract

The invention discloses a hinge assembly and electronic equipment, and relates to the technical field of hinges. The hinge assembly comprises a hinge base, a first swing arm, a second swing arm, an elastic piece, a synchronizing shaft and a sliding assembly, the first swing arm is provided with an arc-shaped connecting part, the arc-shaped connecting part is in sliding fit with an arc-shaped sliding groove of the hinge base, the synchronizing shaft is arranged on the hinge base, and the second swing arm is arranged on the synchronizing shaft. The second swing arm, the elastic piece and the sliding assembly are all arranged on the synchronizing shaft in a sliding and sleeving mode, a first cam face is arranged at the first end of the sliding assembly and abuts against the second cam face of the arc-shaped connecting part, the second end of the sliding assembly abuts against the elastic piece, and the second end of the sliding assembly abuts against the second cam face of the arc-shaped connecting part. The sliding assembly is arranged between the arc-shaped connecting part and the elastic part so that the sliding assembly can be connected between the arc-shaped connecting part and the elastic part in a transmission mode, the second swing arm is rotationally connected with the sliding assembly, and the second swing arm can rotate relative to the synchronizing shaft and the sliding assembly.

Description

Technical Field

[0001] The present application belongs to the field of hinge technology, and specifically relates to a hinge assembly and an electronic device. Background Art

[0002] In foldable electronic devices, the hinge mechanism, as one of the key components, plays an important role in the overall opening, closing and hovering of the electronic device. Therefore, it is necessary to continuously optimize the layout and structure of the various components of the hinge mechanism to improve the space utilization rate so that the hinge mechanism can generate greater damping force and higher reliability in a smaller space.

[0003] Generally, the hinge mechanism of a foldable electronic device includes a plurality of hinge assemblies spaced apart in the axial direction, and each hinge assembly is arranged in sequence along the length direction of the hinge base. However, the damping member of the current hinge assembly occupies a large space in the length direction of the hinge assembly, which is not conducive to the arrangement of other components of the hinge assembly and also causes the entire hinge assembly to be longer. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a hinge assembly and an electronic device, which can solve the problem that the damping member of the current hinge assembly occupies a large space in the length direction of the hinge assembly.

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

[0006] In a first aspect, the present application provides a hinge assembly, including a hinge base, a first swing arm, a second swing arm, an elastic member, a synchronization shaft and a sliding assembly.

[0007] In which, the first swing arm is provided with an arc-shaped connecting part, and the arc-shaped connecting part is slidably matched with the arc-shaped sliding groove of the hinge base, the synchronous shaft is arranged on the hinge base, the second swing arm, the elastic member and the sliding assembly can be slidably mounted on the synchronous shaft, the first end of the sliding assembly is provided with a first cam surface, the first cam surface abuts against the second cam surface of the arc-shaped connecting part, and the second end of the sliding assembly abuts against the elastic member so that the sliding assembly is transmission-connected between the arc-shaped connecting part and the elastic member, the second swing arm is rotationally connected to the sliding assembly, and the second swing arm can rotate relative to the synchronous shaft and the sliding assembly.

[0008] In a second aspect, the present application further provides an electronic device, comprising a first device body, a second device body and the above-mentioned hinge assembly, wherein the first device body is connected to the second device body through the hinge assembly;

[0009] 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.

[0010] In an embodiment of the present application, the first swing arm is provided with an arc-shaped connecting portion, and the arc-shaped connecting portion is slidably matched with the arc-shaped sliding groove of the hinge base. The synchronous shaft is arranged on the hinge base. The second swing arm, the elastic member and the sliding assembly can be slidably mounted on the synchronous shaft. The first end of the sliding assembly is provided with a first cam surface, and the first cam surface abuts against the second cam surface of the arc-shaped connecting portion. The second end of the sliding assembly abuts against the elastic member so that the sliding assembly is transmission-connected between the arc-shaped connecting portion and the elastic member. The second swing arm is rotatably connected to the sliding assembly. The second swing arm can rotate relative to the synchronous shaft and the sliding assembly. In the process of the first swing arm driving the arc-shaped connecting portion to rotate around its rotation center axis, the arc-shaped connecting portion drives the sliding assembly and the second swing arm to slide relative to the synchronous shaft together, so that the elastic member is deformed.

[0011] Compared with the prior art, the present solution sets a second cam surface on the end surface of the arc-shaped connecting portion of the first swing arm to abut against the first cam surface of the sliding assembly, so that the first swing arm and the second swing arm both cooperate with the elastic member directly or indirectly to generate damping force, thereby eliminating the need to set additional damping members such as a retaining spring between the first swing arm and the second swing arm, thereby reducing the number of components of the hinge assembly, thereby saving the layout space in the length direction of the hinge base, which is conducive to shortening the length of the hinge assembly and facilitating the layout of other components of the hinge assembly; in addition, the present solution sets a connection relationship between the first swing arm and the second swing arm and the elastic member, so that during the rotation of the first swing arm around the rotation center axis of the arc-shaped connecting portion, the sliding assembly, the second swing arm and the elastic member are linked together, which is conducive to improving the stability of the damping force transmitted between the various structural members, and the first swing arm and the second swing arm are arranged adjacent to each other. When the electronic device falls, the first swing arm and the second swing arm interact with each other. At this time, the first swing arm can provide a certain support force for the second swing arm to avoid its breakage, thereby protecting the second swing arm, and further improving the falling reliability of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 An exploded view of the hinge assembly disclosed in the embodiment of the present application;

[0013] Figures 2 to 3 It is a schematic diagram of the structure of the hinge assembly disclosed in the embodiment of the present application at different viewing angles;

[0014] Figure 4 It is a structural schematic diagram of the hinge base and the first sliding member disclosed in the embodiment of the present application;

[0015] Figure 5 for Figure 4 A cross-sectional view of the structure shown at AA;

[0016] Figure 6 for Figure 4 A cross-sectional view of the structure shown at BB.

[0017] Description of reference numerals:

[0018] 100-hinge base, 110-arc-shaped slide groove, 120-first side wall, 130-second side wall, 140-base, 141-first surface, 142-limiting buckle, 142a-connecting part, 142a1-first side surface, 142a2-connecting hole, 142b-limiting part, 143-first limiting groove, 150-pressing cover, 160-fixing bracket, 161-second connecting shaft, 170-connecting piece;

[0019] 200-first swing arm, 210-arc-shaped connecting portion, 211-second cam surface;

[0020] 300-elastic parts;

[0021] 400-synchronous shaft;

[0022] 500-sliding assembly, 510-first cam surface, 530-first sliding member, 531-first limiting convex portion, 532-connecting convex portion, 533-avoidance opening, 534-second limiting groove, 540-second sliding member, 541-third cam surface, 542-first connecting shaft, 550-synchronizing gear;

[0023] 610-first device body, 611-middle frame bracket, 612-door panel, 620-second device body;

[0024] 700-second swing arm, 710-transmission part, 711-fourth cam surface, 712-second limiting convex part;

[0025] 800 - Elastic drive element. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0028] The hinge assembly and electronic device provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0029] like Figures 1 to 6 As shown, an embodiment of the present application discloses a hinge assembly, which includes a hinge base 100, a first swing arm 200, a second swing arm 700, an elastic member 300, a synchronization shaft 400 and a sliding assembly 500. Optionally, the number of the first swing arm 200 and the second swing arm 700 is at least two, and each first swing arm 200 and each second swing arm 700 are evenly distributed on both sides of the central axis of the hinge base 100 along the width direction of the hinge base 100, and are symmetrically arranged.

[0030] Among them, the first swing arm 200 is provided with an arc-shaped connecting portion 210. Optionally, the first swing arm 200 here can be a virtual swing arm. The arc-shaped connecting portion 210 is slidably matched with the arc-shaped slide groove 110 of the hinge base 100. During the switching process of the hinge assembly between the folded state and the unfolded state, the arc-shaped connecting portion 210 slides along the circumference of the arc-shaped slide groove 110 relative to the arc-shaped slide groove 110, and at the same time, the matching area between the arc-shaped connecting portion 210 and the arc-shaped slide groove 110 also changes. Optionally, the arc-shaped connecting portion 210 is a bearing, and the arc-shaped slide groove 110 is a bearing groove, and the bearing and the bearing groove are slidably matched. Optionally, the end of the first swing arm 200 away from the arc-shaped connecting portion 210 has an arc-shaped matching portion, and the arc-shaped matching portion is used to rotate and match with the first device body 610 or the second device body 620 of the electronic device to ensure that the hinge assembly can be flexibly switched between the folded state and the unfolded state. Optionally, the arc-shaped mating portion may be a bearing structure, and the arc-shaped mating portion may be rotatably mated with the arc-shaped mating groove of the first device body 610 or the second device body 620 .

[0031] The synchronization shaft 400 is arranged on the hinge base 100, and the second swing arm 700, the elastic member 300 and the sliding assembly 500 can all be slidably mounted on the synchronization shaft 400, that is, the second swing arm 700, the elastic member 300 and the sliding assembly 500 can all slide relative to the synchronization shaft 400, and the first end of the sliding assembly 500 is provided with a first cam surface 510, and the first cam surface 510 abuts against the second cam surface 211 of the arc-shaped connecting portion 210, and the second end of the sliding assembly 500 abuts against the elastic member 300, so that the sliding assembly 500 is transmission-connected between the arc-shaped connecting portion 210 and the elastic member 300, and the second swing arm 700 is rotationally connected to the sliding assembly 500, and the second swing arm 700 can rotate relative to the synchronization shaft 400 and the sliding assembly 500. Optionally, the second swing arm 700 can be a synchronization swing arm. When the first swing arm 200 drives the arc-shaped connecting part 210 to rotate around its rotation center axis, the arc-shaped connecting part 210 drives the sliding assembly 500 and the second swing arm 700 to slide relative to the synchronization shaft 400, so that the elastic member 300 is deformed. At this time, the elastic member 300 acts as a damping member of the hinge assembly and provides damping force for the first swing arm 200, the second swing arm 700 and the sliding assembly 500.

[0032] Compared with the prior art, the present application sets a second cam surface 211 on the end surface of the arc-shaped connecting portion 210 of the first swing arm 200 to abut against the first cam surface 510 of the sliding assembly 500, so that the first swing arm 200 and the second swing arm 700 both indirectly cooperate with the elastic member 300 to generate a damping force, thereby eliminating the need to set additional damping members such as a retaining spring between the first swing arm 200 and the second swing arm 700, thereby reducing the number of parts of the hinge assembly, thereby saving the layout space in the length direction of the hinge base 100, which is conducive to shortening the length of the hinge assembly and facilitating the layout of other parts of the hinge assembly. Therefore, the present application can solve the problem that the damping member of the hinge assembly currently occupies a large space in the length direction of the hinge assembly.

[0033] In addition, the present solution establishes a connection relationship between the first swing arm 200 and the second swing arm 700 and the elastic member 300. During the rotation of the first swing arm 200 around the rotation center axis of the arc-shaped connecting portion 210, the sliding assembly 500, the second swing arm 700 and the elastic member 300 are linked together, which is beneficial to improving the stability of the transmission of the damping force between the various structural members. The first swing arm 200 and the second swing arm 700 are arranged adjacent to each other. When the electronic device falls, the first swing arm 200 and the second swing arm 700 interact with each other. At this time, the first swing arm 200 can provide a certain supporting force for the second swing arm 700 to avoid its breakage, thereby protecting the second swing arm 700 and further improving the falling reliability of the electronic device.

[0034] In an optional embodiment, the second swing arm 700 is provided with a transmission part 710, which can be slidably mounted on the synchronization shaft 400, and the transmission part 710 can rotate relative to the synchronization shaft 400, and the end of the second swing arm 700 away from the transmission part 710 is used to be movably connected with the first device body 610 or the second device body 620 of the electronic device, and the second swing arm 700 can slide relative to the first device body 610 or the second device body 620 along the length direction of the hinge base 100, and the sliding assembly 500 includes a first sliding member 530, which can be slidably mounted on the synchronization shaft 400, and the first sliding member 530 can rotate relative to the synchronization shaft 400. 0 is provided with a first cam surface 510, and two ends of the transmission part 710 are respectively abutted against the first sliding member 530 and the elastic member 300. At this time, the first sliding member 530 is transmission-connected with the elastic member 300 through the transmission part 710, and the elastic member 300 provides a damping force for the transmission part 710, the first sliding member 530 and the arc-shaped connecting part 210, so that the first cam surface 510 of the first sliding member 530 is always abutted against the second cam surface 211 of the first swing arm 200, and the second swing arm 700 is always abutted against the first sliding member 530, thereby ensuring that the first swing arm 200 and the second swing arm 700 can stably hover when they rotate to a certain position.

[0035] In the above scheme, when the first swing arm 200 drives the arc-shaped connecting part 210 to rotate around its rotation center axis, the arc-shaped connecting part 210 drives the sliding assembly 500 and the second swing arm 700 to slide relative to the synchronization shaft 400. At the same time, the second swing arm 700 slides relative to the first device body 610 or the second device body 620 along the length direction of the hinge base 100 (that is, the extension direction of the synchronization shaft 400), and the second swing arm 700 rotates relative to the first device body 610 or the second device body 620. At this time, the first device body 610 or the second device body 620 can be fixed relative to the hinge base 100, which is conducive to improving the flexibility of the movement of the second swing arm 700. Of course, the end of the second swing arm 700 away from the transmission part 710 can also be rotatably connected to the first device body 610 or the second device body 620 of the electronic device. When the first swing arm 200 drives the arc-shaped connection part 210 to rotate around its rotation center axis, the second swing arm 700 only rotates relative to the first device body 610 or the second device body 620. At this time, the first device body 610 or the second device body 620 slides relative to the hinge base 100 together with the second swing arm 700.

[0036] Optionally, the diameter of the arc-shaped connection portion 210 may be equal to or smaller than the diameter of the transmission portion 710; or, in another embodiment, the diameter of the arc-shaped connection portion 210 is larger than the diameter of the transmission portion 710. When the diameter of the arc-shaped connection portion 210 is larger than the diameter of the transmission portion 710 during the switching of the hinge assembly between the folded state and the unfolded state, this may increase the torque of the arc-shaped connection portion 210, thereby improving the rotational flexibility of the first swing arm 200.

[0037] Optionally, the ratio of the diameter of the arc-shaped connecting portion 210 to the diameter of the transmission portion 710 can be 1.5 to 2. At this time, the torque of the arc-shaped connecting portion 210 can be increased by 50% to 100%. Of course, it can also be flexibly selected according to actual needs, and the embodiment of the present application does not impose specific restrictions on this.

[0038] Optionally, the arc length of the gear teeth of the second cam surface 211 is greater than the arc length of the gear teeth of the fourth cam surface 711. When the damping forces transmitted by the elastic member 300 to the arc-shaped connecting portion 210 and the transmission portion 710 are substantially the same, the amount of twisting of the arc-shaped connecting portion 210 can be reduced, thereby improving the efficiency of switching the hinge assembly between the folded state and the unfolded state. Of course, the arc length of the gear teeth of the second cam surface 211 can also be equal to or less than the arc length of the gear teeth of the fourth cam surface 711.

[0039] In a further optional embodiment, the sliding assembly 500 also includes a second sliding member 540, which is slidably mounted on the synchronous shaft 400, and the second sliding member 540 is located between the transmission part 710 and the elastic member 300. The first end face of the second sliding member 540 is provided with a third cam surface 541, and the third cam surface 541 abuts against the fourth cam surface 711 of the transmission part 710. The second end face of the second sliding member 540 abuts against the elastic member 300, so that the transmission part 710 abuts against the elastic member 300 through the second sliding member 540, which can increase the contact area of ​​the transmission connection between the transmission part 710 and the elastic member 300, so that the damping force provided by the elastic member 300 can be stably transmitted; and the second sliding member 540 and the transmission part 710 are abutted and matched through the third cam surface 541 and the fourth cam surface 711, and the contact area between the two is large, which is conducive to the stable transmission of the damping force. Of course, the second sliding member 540 may not be provided, and the end surface of the transmission part 710 is in direct contact with the elastic member 300 .

[0040] In a further optional embodiment, the second end surface of the first sliding member 530 is provided with a first limiting protrusion 531, and the first end surface of the transmission part 710 is provided with a second limiting protrusion 712, and the second limiting protrusion 712 cooperates with the first limiting protrusion 531 in the circumferential upper limit of the synchronization shaft 400. When the second swing arm 700 rotates to the point where the second limiting protrusion 712 of the transmission part 710 cooperates with the first limiting protrusion 531 of the first sliding member 530, the second swing arm 700 can be prevented from continuing to rotate relative to the synchronization shaft 400. For example, when the hinge assembly is in a folded state or an unfolded state, the second swing arm 700 can be prevented from continuing to rotate to squeeze or pull the flexible display screen of the electronic device; and the limiting cooperation between the second limiting protrusion 712 and the first limiting protrusion 531 can also improve the stability of the second swing arm 700 when it is suspended. Of course, the second limiting protrusion 712 and the first limiting protrusion 531 may not be provided.

[0041] The second limiting protrusion 712 abuts against the second end surface of the first sliding member 530 to transmit the damping force provided by the elastic member 300 .

[0042] Optionally, the end face of the second limiting protrusion 712 and the second end face of the first sliding member 530 are both planes, the rotation center axis of the arc-shaped connecting portion 210 is perpendicular to the plane, the end face of the second limiting protrusion 712 is in contact with the second end face of the first sliding member 530, and the second end face of the transmission portion 710 is provided with a fourth cam surface 711. The end face of the second limiting protrusion 712 and the second end face of the first sliding member 530 are both planes, and the two adopt a surface contact method, the contact area is large, and the friction torque generated accordingly is also large, which is conducive to improving the hovering stability of the second swing arm 700 when it rotates to a certain position. Of course, the end face of the second limiting protrusion 712 and one of the second end faces of the first sliding member 530 can be a concave-convex surface, only partially in contact, or even in line contact or point contact.

[0043] In an optional embodiment, the second end face of the first sliding member 530 is further provided with a connecting protrusion 532, and the connecting protrusion 532 and the first limiting protrusion 531 are spaced apart along the width direction of the hinge base 100, and the second limiting protrusion 712 is located between the connecting protrusion 532 and the first limiting protrusion 531. The second limiting protrusion 712 can cooperate with the connecting protrusion 532 in the upper limit direction of the width direction of the hinge base 100, thereby preventing the transmission part 710 from moving along the width direction of the hinge base 100 during the rotation of the transmission part 710 relative to the synchronization shaft 400, thereby causing the second swing arm 700 to move along a preset direction.

[0044] The sliding assembly 500 further includes a synchronous gear 550, which is rotatably connected between the connecting protrusion 532 and the second sliding member 540, and the synchronous gear 550 is meshed with the transmission part 710. Since the hinge assembly is a symmetrical structure, the number of the second swing arms 700 is two, and the second swing arms 700 disposed on both sides of the hinge base 100 are connected by the synchronous gear 550 to ensure that the hinge assembly can rotate synchronously during the switching process between the folded state and the unfolded state.

[0045] One end of the synchronous gear 550 in this solution is rotatably connected to the connecting protrusion 532, which can reduce the length of the synchronous gear 550, thereby reducing the length and weight of the hinge assembly; and, during the switching of the hinge assembly between the folded state and the unfolded state, the second limiting protrusion 712 can cooperate with the connecting protrusion 532 in the width direction of the hinge base 100 to limit the position, so that the second swing arm 700 moves in a preset direction, so the connecting protrusion 532 has a dual-purpose effect. Of course, the connecting protrusion 532 can also be omitted, and the synchronous gear 550 can be directly rotatably connected to the second end surface of the first sliding member 530.

[0046] In another optional embodiment, the hinge base 100 includes a detachably connected seat body 140 and a pressure cover 150, the pressure cover 150 covers the seat body 140 to enclose an arc-shaped slide groove 110, the side of the seat body 140 facing the pressure cover 150 is a first surface 141, the first surface 141 is provided with a limit buckle 142 and a first limit groove 143, the first sliding member 530 and the limit buckle 142 are limitedly matched along the thickness direction of the seat body 140, and the thickness direction of the seat body 140 here can specifically be a direction perpendicular to the first surface 141. Optionally, part of the first sliding member 530 is arranged in the first limit groove 143, and the first sliding member 530 and the side wall of the first limit groove 143 are limitedly matched in the width direction of the seat body 140. When the second swing arm 700 rotates relative to the synchronous shaft 400, the first sliding member 530 and the limiting buckle 142 are limited and matched to prevent the transmission part 710 of the second swing arm 700 from tilting along the thickness direction of the seat body 140. At the same time, the first sliding member 530 and the side wall of the first limiting groove 143 are limited and matched to prevent the first sliding member 530 from moving along the width direction of the seat body 140, so that the first sliding member 530 and the transmission part 710 are stably abutted and matched. In addition, the seat body 140 and the pressure cover 150 in this solution are detachably connected, which can facilitate the installation of the arc-shaped connecting part 210 and the first sliding member 530. Of course, the seat body 140 and the pressure cover 150 can also be an integrated structure; the limiting buckle 142 can also be set on the pressure cover 150.

[0047] Optionally, the limit buckle 142 and the first limit groove 143 can be arranged along the length direction of the base body 140; or, in other embodiments, the limit buckle 142 and the first limit groove 143 are arranged in sequence along the width direction of the base body 140, thereby reducing the space occupied by the limit buckle 142 and the first limit groove 143 in the length direction of the base body 140 and shortening the length of the hinge base 100. The limiting buckle 142 includes a connected connecting portion 142a and a limiting portion 142b, the limiting portion 142b is bent relative to the connecting portion 142a, that is, the limiting buckle 142 is an L-shaped structure, the limiting portion 142b faces the first surface 141, and a portion of the first sliding member 530 is located between the limiting portion 142b and the first surface 141, so that the first sliding member 530 and the limiting buckle 142 are limitedly matched along the thickness direction of the seat body 140, and the limiting buckle 142 and the first limiting groove 143 can be spaced apart in the width direction of the seat body 140. or, the first side surface 142a1 of the connecting portion 142a extends into the first limiting groove 143, that is, the side wall of the first limiting groove 143 forms a part of the first side surface 142a1 of the connecting portion 142a, and the limiting buckle 142 is connected to the first limiting groove 143 in the width direction of the base body 140. At this time, the space occupied by the limiting buckle 142 and the first limiting groove 143 in the width direction of the base body 140 can be reduced, thereby reducing the width of the hinge base 100, and then reducing the thickness of the electronic device when it is in a folded state.

[0048] In another optional embodiment, the first sliding member 530 can be a frame structure; or, the first sliding member 530 is a plate-like structure with greater structural strength. The first sliding member 530 is provided with an avoidance opening 533, and the connecting portion 142a extends through the avoidance opening 533 to the side of the first sliding member 530 close to the pressure cover 150, and at least part of the limiting portion 142b is located between the pressure cover 150 and the first sliding member 530. At this time, during the sliding of the first sliding member 530 relative to the synchronization shaft 400, the connecting portion 142a of the limiting buckle 142 can be limitedly matched with the side wall of the avoidance opening 533, which can prevent the first sliding member 530 from sliding too far due to inertia, thereby allowing the first sliding member 530 to stably abut against the arc-shaped connecting portion 210.

[0049] Alternatively, in other embodiments, a second limiting groove 534 is provided on a side of the first sliding member 530 facing the pressure cover 150, and the limiting portion 142b can be limitedly matched with the second limiting groove 534 along the sliding direction of the first sliding member 530, and the limiting portion 142b and the groove bottom of the second limiting groove 534 are limitedly matched along the thickness direction of the seat body 140. At this time, in the process of the first sliding member 530 sliding relative to the synchronous shaft 400, the limiting buckle 142 and the first sliding member 530 can be limitedly matched not only in the length direction of the seat body 140, but also in the thickness direction of the seat body 140, and part of the limiting portion 142b is located in the second limiting groove 534, which can reduce the height of the limiting buckle 142, and correspondingly can reduce the distance between the pressure cover 150 and the first surface 141 of the seat body 140, thereby reducing the height of the hinge base 100; in addition, adopting this setting method is conducive to improving the compactness of various components of the hinge assembly.

[0050] Optionally, the connecting portion 142a is provided with a connecting hole 142a2, the gland 150 is provided with a through hole, and the hinge base 100 further includes a connecting member 170. Optionally, the connecting member 170 can be a fastener such as a screw, which is not specifically limited here; one end of the connecting member 170 passes through the through hole and is connected to the connecting hole 142a2, so that the gland 150 is detachably connected to the base 140. Of course, the connecting member 170 can also be staggered with the connecting portion 142a, in which case the connecting member 170 can be connected to other positions of the base 140.

[0051] In another optional embodiment, the hinge base 100 has a first side wall 120 and a second side wall 130 that are arranged opposite to each other, and the first end face of the arc-shaped connecting portion 210 is against the first side wall 120. The first end face can be a concave-convex surface. In this case, the first end face and the first side wall 120 can be in point contact or line contact, and the contact area between the two is small; or, in other embodiments, the first end face of the arc-shaped connecting portion 210 is a plane, which not only facilitates the manufacture of the arc-shaped connecting portion 210, but also the first end face and the first side wall 120 are in surface contact, and the contact area is large; further optionally, the first end face can be an inclined plane, in which case the rotation of the arc-shaped connecting portion 210 The angle between the central axis and the first end face is an acute angle; or, the rotation central axis of the arc-shaped connecting portion 210 is perpendicular to the first end face of the arc-shaped connecting portion 210, and the first end face of the arc-shaped connecting portion 210 is in contact with the first side wall 120. At this time, the direction of the end face friction force between the arc-shaped connecting portion 210 and the first side wall 120 is perpendicular to the rotation central axis of the arc-shaped connecting portion 210, which means that the end face friction force has no end face friction component. When the first swing arm 200 is rotated, the end face friction torque between the arc-shaped connecting portion 210 and the first side wall 120 of the hinge base 100 is large, which is conducive to further improving the hovering stability of the first swing arm 200 when it rotates to a certain position. The second end face of the arc-shaped connecting portion 210 is provided with a second cam surface 211, and one end of the elastic member 300 abuts against the second side wall 130. When the other end of the elastic member 300 is subjected to a driving force, the elastic member 300 is deformed.

[0052] Optionally, the hinge assembly also includes an elastic driving member 800, and the second end face of the second sliding member 540 is provided with a first connecting shaft 542. The elastic driving member 800 is sleeved on the first connecting shaft 542, and the elastic driving member 800 and the elastic member 300 are arranged side by side along the width direction of the hinge base 100. At this time, the elastic driving member 800 and the elastic member 300 jointly serve as a damping member of the hinge assembly, thereby providing a larger damping force for the first swing arm 200, the second swing arm 700 and the sliding assembly 500.

[0053] Further optionally, the hinge base 100 also includes a fixed bracket 160, which is detachably arranged on the first surface 141 of the base body 140, and the fixed bracket 160 forms the second side wall 130 of the hinge base 100. One end of the synchronization shaft 400 passes through the fixed bracket 160 and abuts against the base body 140, which can increase the connection area between the synchronization shaft 400 and the hinge base 100, thereby improving the setting stability of the synchronization shaft 400.

[0054] One end of the elastic member 300 abuts against the fixed bracket 160, and a second connecting shaft 161 is provided on a side of the fixed bracket 160 facing the sliding assembly 500. The central axis of the second connecting shaft 161 coincides with the central axis of the first connecting shaft 542, and the two are arranged at intervals. The first part of the elastic driving member 800 is sleeved on the first connecting shaft 542, and the second part of the elastic driving member 800 is sleeved on the second connecting shaft 161.

[0055] Based on the hinge assembly disclosed in the embodiment of the present application, the embodiment of the present application also discloses an electronic device, which includes a first device body 610, a second device body 620 and the hinge assembly described in any of the above embodiments, the first device body 610 is connected to the second device body 620 through the hinge assembly; during the relative rotation of the first device body 610 and the second device body 620, the electronic device switches between the unfolded state and the folded state. Optionally, the first device body 610 and the second device body 620 both include a connected middle frame bracket 611 and a door panel 612, the first swing arm 200 of the hinge assembly is rotatably connected to the middle frame bracket 611, and the second swing arm 700 of the hinge assembly is movably connected to the middle frame bracket 611, that is, the second swing arm 700 can rotate relative to the middle frame bracket 611, and can slide relative to the middle frame bracket 611 along the length direction of the hinge base 100.

[0056] Optionally, the number of hinge assemblies is at least two, and the hinge assemblies are arranged in sequence and spaced apart in the length direction of the electronic device.

[0057] The electronic device disclosed in the embodiments of the present application may be a smart phone, a tablet computer, an e-book reader, a wearable device (such as a smart watch), an electronic game console, or other electronic device. The embodiments of the present application do not impose any specific restrictions on the type of electronic device.

[0058] 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 assembly, characterized in that: It includes a hinge base, a first swing arm, a second swing arm, an elastic member, a synchronous shaft and a sliding assembly. In which, the first swing arm is provided with an arc-shaped connecting part, and the arc-shaped connecting part is slidably matched with the arc-shaped sliding groove of the hinge base, the synchronous shaft is arranged on the hinge base, the second swing arm, the elastic member and the sliding assembly can be slidably mounted on the synchronous shaft, the first end of the sliding assembly is provided with a first cam surface, the first cam surface abuts against the second cam surface of the arc-shaped connecting part, and the second end of the sliding assembly abuts against the elastic member so that the sliding assembly is transmission-connected between the arc-shaped connecting part and the elastic member, the second swing arm is rotationally connected to the sliding assembly, and the second swing arm can rotate relative to the synchronous shaft and the sliding assembly.

2. The hinge assembly according to claim 1, characterized in that: The second swing arm is provided with a transmission part, the transmission part is slidably mounted on the synchronization shaft, and the transmission part can rotate relative to the synchronization shaft, one end of the second swing arm away from the transmission part is used for active connection with the first device body or the second device body of the electronic device, and the second swing arm can slide relative to the first device body or the second device body along the length direction of the hinge base, The sliding assembly comprises a first sliding member, which is slidably sleeved on the synchronization shaft, a first end surface of the first sliding member is provided with the first cam surface, and two ends of the transmission part are respectively in contact with the first sliding member and the elastic member.

3. The hinge assembly according to claim 2, characterized in that: The sliding assembly also includes a second sliding member, which is slidably mounted on the synchronization shaft, and is located between the transmission part and the elastic member. The first end face of the second sliding member is provided with a third cam surface, and the third cam surface abuts against the fourth cam surface of the transmission part. The second end face of the second sliding member abuts against the elastic member, so that the transmission part abuts against the elastic member through the second sliding member.

4. The hinge assembly according to claim 3, characterized in that: The second end face of the first sliding member is provided with a first limiting protrusion, and the first end face of the transmission part is provided with a second limiting protrusion. The second limiting protrusion cooperates with the first limiting protrusion in the circumferential upper limit of the synchronization shaft, and the second limiting protrusion abuts against the second end face of the first sliding member. The end face of the second limiting protrusion and the second end face of the first sliding member are both planes, and the rotation center axis of the arc-shaped connecting part is perpendicular to the plane. The end face of the second limiting protrusion fits with the second end face of the first sliding member, and the second end face of the transmission part is provided with the fourth cam surface.

5. The hinge assembly according to claim 4, characterized in that: The second end face of the first sliding member is also provided with a connecting protrusion, and the connecting protrusion and the first limiting protrusion are arranged at intervals along the width direction of the hinge base, and the second limiting protrusion is located between the connecting protrusion and the first limiting protrusion, and the second limiting protrusion can cooperate with the connecting protrusion in the width direction of the hinge base. The sliding assembly also includes a synchronous gear, which is rotatably connected between the connecting protrusion and the second sliding member, and the synchronous gear is meshed with the transmission part.

6. The hinge assembly according to claim 2, characterized in that: The hinge base includes a detachably connected seat body and a pressure cover, the pressure cover covers the seat body to enclose the arc-shaped slide groove, the side of the seat body facing the pressure cover is a first side, the first side is provided with a limit buckle and a first limit groove, the first sliding member and the limit buckle are limitedly matched along the thickness direction of the seat body, a part of the first sliding member is arranged in the first limit groove, and the first sliding member and the side wall of the first limit groove are limitedly matched in the width direction of the seat body.

7. The hinge assembly according to claim 6, characterized in that: The limit buckle and the first limit groove are arranged in sequence along the width direction of the seat body, the limit buckle includes a connected connecting part and a limit part, the limit part is bent relative to the connecting part, the limit part faces the first surface, and part of the first sliding member is located between the limit part and the first surface, so that the first sliding member and the limit buckle are limitedly matched along the thickness direction of the seat body, and the first side surface of the connecting part extends into the first limit groove.

8. The hinge assembly according to claim 7, characterized in that: The first sliding member is provided with an avoidance opening, the connecting portion extends through the avoidance opening to a side of the first sliding member close to the pressure cover, at least part of the limiting portion is located between the pressure cover and the first sliding member, and a second limiting groove is provided on a side of the first sliding member facing the pressure cover, the limiting portion can be limitedly matched with the second limiting groove along the sliding direction of the first sliding member, and the limiting portion and the groove bottom of the second limiting groove are limitedly matched along the thickness direction of the seat body.

9. The hinge assembly according to claim 1, characterized in that: The hinge base has a first side wall and a second side wall that are arranged opposite to each other, the first end face of the arc-shaped connecting part abuts against the first side wall, the first end face of the arc-shaped connecting part is a plane, the rotation center axis of the arc-shaped connecting part is perpendicular to the first end face of the arc-shaped connecting part, the first end face of the arc-shaped connecting part is in contact with the first side wall, the second end face of the arc-shaped connecting part is provided with the second cam surface, and one end of the elastic member abuts against the second side wall.

10. An electronic device, characterized in that: comprising a first device body, a second device body and a hinge assembly according to any one of claims 1 to 9, wherein the first device body is connected to the second device body via the hinge assembly; 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.

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