Hinge assembly and electronic device

Abstract

The present application discloses a hinge assembly and an electronic device, belonging to the technical field of electronic devices. The hinge assembly includes: a bracket, the bracket includes an axis hole and a groove; a rotating shaft, the rotating shaft is inserted into the axis hole; a clamp ring, the clamp ring includes a clamping groove, the rotating shaft is clamped into the clamping groove, the side of the clamp ring facing the bracket includes a protrusion, the protrusion is embedded in the groove; a swing arm, the swing arm is sleeved on the rotating shaft, the swing arm can rotate around the rotating shaft, and the swing arm is located on the side of the bracket facing away from the clamp ring.

Description

Technical Field

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

[0002] With the rapid development of the consumer electronics industry, users have higher and higher functional demands on mobile terminal devices. In pursuit of large-screen display experience and convenience of carrying, foldable devices such as foldable screen mobile phones, tablets, and computers have become the best choice for most users.

[0003] Folding devices achieve folding action through hinges. The rotating shaft is the core component of the hinge. The rotating shaft needs to be positioned by a clamping ring. The clamping ring is provided with a slot, and the rotating shaft is inserted into the slot to ensure the reliability and stability of the folding action.

[0004] However, as the size of foldable devices continues to shrink, the size of the clamping ring is forced to continue to decrease, causing the clamping ring to be easily bent and broken at the clamping slot position, resulting in technical problems such as poor hinge reliability and high failure rate in foldable devices. Summary of the invention

[0005] The present application aims to provide an electronic device that can solve the technical problems of poor hinge reliability and high failure rate in related technologies.

[0006] In order to solve the above technical problems, this application is implemented as follows:

[0007] In the first aspect, an embodiment of the present application proposes a hinge assembly, which includes: a bracket, the bracket includes an axis hole and a groove; a rotating shaft, the rotating shaft is passed through the axis hole; a clamping ring, the clamping ring includes a clamping groove, the rotating shaft is clamped into the clamping groove, the side of the clamping ring facing the bracket includes a protrusion, and the protrusion is embedded in the groove; a swing arm, the swing arm is sleeved on the rotating shaft, the swing arm can rotate around the rotating shaft, and the swing arm is located on the side of the bracket facing away from the clamping ring.

[0008] In a second aspect, an embodiment of the present application provides an electronic device, comprising: the hinge assembly in the embodiment of the first aspect; and a shell connected to the swing arm.

[0009] By providing the above-mentioned groove and protrusion between the bracket and the collar, part of the force exerted by the rotating shaft on the collar can be transmitted to the bracket through the protrusion and the groove, that is, the bracket can provide support for the collar, thereby alleviating part of the force on the collar through the bracket, alleviating the stress concentration problem on the collar, reducing the probability of irreversible deformation or even fracture of the collar at the groove, thereby improving the structural strength of the collar and reducing the failure rate of the collar. At the same time, the bracket can also provide positioning for the collar through the groove and the protrusion, reducing the probability of the collar moving on the bracket, thereby improving the positioning accuracy of the collar.

[0010] It can be seen that the present application solves the technical problems of poor hinge reliability and high failure rate existing in the related technology by providing a protrusion on the clamping ring and inserting the protrusion into the groove on the bracket, thereby achieving the technical effect of improving the structural stability of the hinge assembly and extending the service life of the hinge assembly.

[0011] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0013] Figure 1 A schematic diagram of the structure of a bracket according to an embodiment of the present application is shown;

[0014] Figure 2 One of the structural schematic diagrams of the clamp ring according to an embodiment of the present application is shown;

[0015] Figure 3 A second structural schematic diagram of a clamp ring according to an embodiment of the present application is shown;

[0016] Figure 4 One of the structural schematic diagrams of the hinge assembly according to an embodiment of the present application is shown;

[0017] Figure 5 for Figure 4 A partial enlarged view of the hinge assembly in area A in the illustrated embodiment;

[0018] Figure 6 A second structural schematic diagram of a hinge assembly according to an embodiment of the present application is shown;

[0019] Figure 7 A third structural schematic diagram of a hinge assembly according to an embodiment of the present application is shown;

[0020] Figure 8 A fourth structural schematic diagram of a hinge assembly according to an embodiment of the present application is shown;

[0021] Fig. 9 for Figure 8 A partial enlarged view of the hinge assembly in the illustrated embodiment at area B;

[0022] Fig.10 A fifth structural schematic diagram of a hinge assembly according to an embodiment of the present application is shown;

[0023] Fig.11 A sixth structural schematic diagram of a hinge assembly according to an embodiment of the present application is shown;

[0024] Fig.12 FIG7 shows a seventh structural schematic diagram of a hinge assembly according to an embodiment of the present application;

[0025] Fig.13 An eighth structural schematic diagram of a hinge assembly according to an embodiment of the present application is shown;

[0026] Fig.14 A ninth structural schematic diagram of a hinge assembly according to an embodiment of the present application is shown;

[0027] Fig.15 An exploded view of a hinge assembly according to an embodiment of the present application is shown.

[0028] Reference numerals:

[0029] 100 hinge assembly, 110 bracket, 112 shaft hole, 114 groove, 1142 first groove, 1144 second groove, 120 rotating shaft, 122 limiting groove, 123 first circular shaft section, 124 flat shaft section, 125 second circular shaft section, 130 clamping ring, 132 clamping groove, 1322 opening, 134 protrusion, 1342 first protrusion, 1344 second protrusion, 1346 first arc surface, 1348 second arc surface, 136 reinforcing rib, 1362 reinforcing section, 1364 connecting section, 140 swing Arm, 141 first virtual swing arm, 142 second virtual swing arm, 143 first synchronous swing arm, 144 second synchronous swing arm, 145 third synchronous swing arm, 146 fourth synchronous swing arm, 147 first connecting rod, 1472 first connecting shaft, 148 second connecting rod, 1482 second connecting shaft, 150 first support frame, 152 second support frame, 154 pressure cover, 160 first cam seat, 162 spring, 164 second cam seat, 166 first screw, 167 gear, 168 fixing frame, 169 second screw. DETAILED DESCRIPTION

[0030] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0031] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0032] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0033] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] Combine the following Figures 1 to 15 A hinge assembly and an electronic device according to embodiments of the present application are described.

[0035] like Figure 1 , Figure 2 , Figure 4 , Figure 6 , Figure 8 and Fig.10 As shown, in some embodiments of the present application, a hinge assembly 100 is provided, and the hinge assembly 100 includes: a bracket 110, the bracket 110 includes an axial hole 112 and a groove 114; a rotating shaft 120, the rotating shaft 120 is passed through the axial hole 112; a clamping ring 130, the clamping ring 130 includes a clamping groove 132, the rotating shaft 120 is clamped into the clamping groove 132, and the side of the clamping ring 130 facing the bracket 110 includes a protrusion 134, and the protrusion 134 is embedded in the groove 114; a swing arm 140, the swing arm 140 is sleeved on the rotating shaft 120, the swing arm 140 can rotate around the rotating shaft 120, and the swing arm 140 is located on the side of the bracket 110 that is away from the clamping ring 130.

[0036] Figure 4 and Figure 6 The middle hinge assembly 100 is in a closed state. Figure 8 and Fig.10 The middle hinge assembly 100 is in an unfolded state.

[0037] In this embodiment, a hinge assembly 100 for use in an electronic device is proposed. The hinge assembly 100 can hinge two shells on the electronic device together, so that the electronic device can change the screen size and storage size through a folding action, thereby improving the human-computer interaction experience of the electronic device.

[0038] The hinge assembly 100 includes a bracket 110 and a rotating shaft 120. The bracket 110 is used to provide positioning and support for the rotating shaft 120. Specifically, the bracket 110 is provided with an axial hole 112. The size of the axial hole 112 is adapted to the size of the rotating shaft 120, so that the rotating shaft 120 can be inserted into the axial hole 112, thereby providing radial positioning for the rotating shaft 120 through the axial hole 112.

[0039] The hinge assembly 100 also includes a clamping ring 130, which is provided with a clamping groove 132. The shape of the clamping groove 132 is adapted to the shape of the peripheral side surface of the specified area on the rotating shaft 120. After the rotating shaft 120 is inserted into the shaft hole 112, the clamping ring 130 can be sleeved on the rotating shaft 120 through the clamping groove 132. The clamping ring 130 is fixed on the bracket 110. The clamping ring 130 can provide axial positioning for the rotating shaft 120 through the clamping groove 132, thereby cooperating with the shaft hole 112 to accurately position the rotating shaft 120, so that the rotating shaft 120 can rotate smoothly at a predetermined position.

[0040] The swing arm 140 is sleeved on the rotating shaft 120 and is used to connect the shell. The swing arm 140 can rotate around the rotating shaft 120, so that the swing arm 140 can drive the shell to rotate around the axis of the rotating shaft 120 to achieve the folding action of the shell.

[0041] Among them, after the miniaturized design, the thickness of the clamping ring 130 and the structural extension distance around the slot 132 are small, the structural strength of the area where the slot 132 is located on the clamping ring 130 is relatively low, and the force of the rotating shaft 120 on the clamping ring 130 is also concentrated on the area where the slot 132 is located, causing the clamping ring 130 to easily have stress concentration problems at the slot 132, which is prone to irreversible deformation or even breakage.

[0042] On this basis, a protrusion 134 is provided on the side of the collar 130 facing the bracket 110, and a groove 114 is provided at a corresponding position of the bracket 110. The shape of the groove 114 matches the shape of the protrusion 134, so that the protrusion 134 can be inserted into the groove 114. During the assembly process, the collar 130 is fitted with the bracket 110, the protrusion 134 is embedded in the groove 114, and the outer surface of the protrusion 134 is fitted with the groove wall of the groove 114.

[0043] By providing the above-mentioned groove 114 and protrusion 134 between the bracket 110 and the collar 130, part of the force exerted by the rotating shaft 120 on the collar 130 can be transmitted to the bracket 110 through the protrusion 134 and the groove 114, that is, the bracket 110 can provide support for the collar 130, so that part of the force on the collar 130 is shared by the bracket 110, the stress concentration problem on the collar 130 is alleviated, and the probability of irreversible deformation or even fracture of the collar 130 at the groove 132 is reduced, thereby improving the structural strength of the collar 130 and reducing the failure rate of the collar 130. At the same time, the bracket 110 can also provide positioning for the collar 130 through the groove 114 and the protrusion 134, reduce the probability of the collar 130 moving on the bracket 110, and thus improve the positioning accuracy of the collar 130.

[0044] It can be seen that the present application solves the technical problems of poor hinge reliability and high failure rate existing in the related art by providing a protrusion 134 on the retaining ring 130 and inserting the protrusion 134 into the groove 114 on the bracket 110, thereby achieving the technical effect of improving the structural stability of the hinge assembly 100 and extending the service life of the hinge assembly 100.

[0045] like Figure 4 , Figure 6 , Figure 8 and Fig.10 As shown, in some embodiments, optionally, the bracket 110 is an axisymmetric structure, and two shaft holes 112 are provided on the bracket 110, and the two shaft holes 112 are along the axis of the bracket ( Figure 2 The center line a shows that the clamping ring 130 is symmetrically arranged; the clamping ring 130 includes two clamping grooves 132, the two clamping grooves 132 correspond to the two shaft holes 112 one by one, and the shape of the clamping groove 132 is different from the shape of the shaft hole 112; each clamping groove 132 is correspondingly provided with a plurality of protrusions 134, and the plurality of protrusions 134 are spaced apart in the circumferential direction of the clamping groove 132, and each shaft hole 112 is correspondingly provided with a plurality of grooves 114, and the plurality of grooves 114 correspond to the plurality of protrusions 134 one by one.

[0046] In this embodiment, the bracket 110 is an axisymmetric structure, and the two axial holes 112 are symmetrically arranged on both sides of the axis of the bracket 110. After assembly, the two rotating shafts 120 are also symmetrically distributed on both sides of the axis of the bracket 110, and the two rotating shafts 120 are respectively connected to two groups of swing arms 140, one of the rotating shafts 120 is connected to the first shell through a group of swing arms 140, and the other rotating shaft 120 is connected to the second shell through a group of swing arms 140, so that the first shell and the second shell can perform a folding action.

[0047] By setting the bracket 110 as an axially symmetrical structure, the two rotating shafts 120 and the two swing arms 140 can be symmetrically distributed. When the two swing arms 140 open and close synchronously, the force points and force directions generated by the two rotating shafts 120 on the bracket 110 are also symmetrical, so that the forces in some directions can offset each other, thereby improving the structural strength of the bracket 110 by optimizing the force on the bracket 110 and reducing the failure rate of the hinge assembly 100.

[0048] On this basis, two card slots 132 are set on the clamping ring 130, and the two card slots 132 are respectively arranged opposite to the two axial holes 112. The two rotating shafts 120 inserted into the two axial holes 112 are respectively inserted into the two card slots 132, so that a single clamping ring 130 can simultaneously meet the axial positioning requirements of the two rotating shafts 120, thereby synchronously completing the connection of multiple rotating shafts 120 through a single assembly operation, thereby achieving the technical effect of reducing the assembly complexity of the hinge assembly 100.

[0049] The shape of the slot 132 is different from that of the shaft hole 112. For example, the shaft hole 112 is a circular hole, and the slot 132 is a strip-shaped slot. By distinguishing the shapes of the slot 132 and the shaft hole 112, the clamp ring 130 can provide circumferential positioning for the shaft 120 through the slot 132, thereby ensuring that the swing arm 140 can rotate around the shaft 120, so that the swing arm 140 will not drive the shaft 120 to rotate during the rotation of the shaft 120, thereby improving the opening and closing accuracy of the hinge assembly 100.

[0050] Specifically, each of the slots 132 on the collar 130 is provided with a plurality of protrusions 134, and the plurality of protrusions 134 are distributed in the circumferential direction of the slots 132, thereby forming an outer convex array around the slots 132. Correspondingly, the number of the grooves 114 on the bracket 110 is the same as the number of the protrusions 134, and the plurality of protrusions 134 and the plurality of grooves 114 correspond one to one.

[0051] By providing a plurality of protrusions 134 around each slot 132, on the one hand, the structure can be reinforced in multiple positions of the slot 132, thereby reducing the probability of irreversible deformation problems in the area where the slot 132 is located, and achieving the technical effect of improving the structural strength of the collar 130 and reducing the failure rate of the collar 130. On the other hand, providing a plurality of protrusions 134 for each slot 132 can reduce the force on each protrusion 134 and reduce the probability of stress damage to the protrusion 134, thereby improving the positioning accuracy of the collar 130 and achieving the technical effect of improving the working stability of the hinge assembly 100.

[0052] like Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, in some embodiments, optionally, the protrusion 134 includes a first protrusion 1342, and the first protrusion 1342 is located on the side of the corresponding slot 132 facing away from the other slot 132; the groove 114 includes a first groove 1142, and the first groove 1142 is located on the peripheral side of the axial hole 112, and the first groove 1142 is connected to the axial hole 112, and the first protrusion 1342 is embedded in the first groove 1142.

[0053] In this embodiment, the plurality of protrusions 134 corresponding to each slot 132 include a first protrusion 1342 , which is disposed on a side of the corresponding slot 132 facing away from the other slot 132 , that is, the first protrusion 1342 is located outside the two first grooves 1142 .

[0054] Correspondingly, a first groove 1142 is provided on the bracket 110, and the shape of the first groove 1142 is adapted to the shape of the first protrusion 1342. The first groove 1142 is also arranged on the side of the corresponding shaft hole 112 facing away from the other shaft hole 112. After assembly is completed, the first protrusion 1342 is embedded in the first groove 1142.

[0055] When the hinge assembly 100 extends from the closed state to the expanded state, the swing arm 140 rotates outward along the rotating shaft 120. Under the action of friction, the swing arm 140 drives the synchronous shaft to rotate accordingly. Figure 4 and Figure 5 The rotating shaft 120 on the left side rotates counterclockwise, and the rotating shaft 120 on the right side rotates clockwise. At this time, the rotating shaft 120 exerts two forces F1 and F2 on the collar 130. The force F2 points to the inner side of the collar 130. The inner side of the collar 130 is not affected by the clamping groove 132, and the structural strength is high, and the risk of fracture is low. The force F1 points to the outer side of the collar 130, and the action area is at the opening 1322 of the clamping groove 132. The force here is likely to cause the collar 130 to be turned outward and fractured.

[0056] In this regard, by providing a first protrusion 1342 on the clamping ring 130, when the clamping ring 130 is unfolded, the first protrusion 1342 is restricted by the first groove 1142 on the bracket 110, thereby generating an inward resistance force F3, and the direction of action of the resistance force F3 is opposite to the direction of action of the force F1, so that the bracket 110 can replace the clamping ring 130 to resist the force F1, thereby reducing the probability of the clamping ring 130 everting and breaking, thereby solving the technical problems of poor hinge reliability and high failure rate in the related technology, and achieving the technical effect of optimizing the structure of the hinge assembly 100, improving the structural stability of the hinge assembly 100, and extending the service life of the hinge assembly 100.

[0057] In this embodiment, the first groove 1142 is opened on the inner ring side of the bracket 110 , and specifically, the first groove 1142 can be connected to the shaft hole 112 .

[0058] When the hinge assembly 100 is extended from the closed state to the extended state, the bottom wall of the first groove 1142 blocks the first protrusion 1342 from turning outward, that is, the bottom wall of the first groove 1142 generates a resistance force F3 on the first protrusion 1342 .

[0059] On this basis, by setting the first groove 1142 on the inner ring side of the shaft hole 112, the bottom wall of the first groove 1142 can be close to the axis of the shaft hole 112, so that the bracket 110 can leave sufficient wall thickness on the outside of the bottom wall of the first groove 1142, ensuring that the first bracket 110 can exert a sufficiently large resistance force F3 on the first protrusion 1342, ensuring that the first groove 1142 can effectively limit the outward turning tendency of the retaining ring 130, thereby achieving the technical effect of improving the structural strength of the bracket 110 and the retaining ring 130 and reducing the probability of outward turning damage of the retaining ring 130.

[0060] like Figure 2 , Figure 3 , Figure 5 , Fig.14 and Fig.15 As shown, in some embodiments, optionally, the rotating shaft 120 includes a first circular shaft segment 123, a flat shaft segment 124 and a second circular shaft segment 125, the flat shaft segment 124 is located between the first circular shaft segment 123 and the second circular shaft segment 125, the first circular shaft segment 123 is inserted into the shaft hole 112, and the flat shaft segment 124 is snapped into the slot 132.

[0061] In this embodiment, in the axial direction of the rotating shaft 120, the rotating shaft 120 includes a first circular shaft segment 123, a flat shaft segment 124, and a second circular shaft segment 125. The circumferential side surface of the flat shaft segment 124 is inwardly contracted relative to the circumferential side surfaces of the first circular shaft segment 123 and the second circular shaft segment 125, thereby forming a limiting groove 122 around the flat shaft segment 124. The shape of the flat shaft segment 124 is adapted to the shape of the clamping groove 132, and the flat shaft segment 124 is clamped into the clamping groove 132 during the assembly process.

[0062] Compared with the solution of designing the part of the rotating shaft 120 inserted into the slot 132 as a round shaft, the cross-sectional area of ​​the flat shaft section 124 is larger, which can enhance the structural strength of the rotating shaft 120 in the flat shaft section 124 and reduce the probability of the rotating shaft 120 breaking.

[0063] Moreover, during the rotation of the swing arm 140 , the friction between the swing arm 140 and the rotating shaft 120 will cause the rotating shaft 120 to rotate to a certain extent. By designing the part of the rotating shaft 120 that is inserted into the slot 132 as a flat shaft, this rotation tendency can be limited by the slot 132, thereby improving the rotation accuracy of the swing arm 140 .

[0064] However, compared with a round shaft, the flat shaft section 124 exerts a greater torsional force on the clamping groove 132, and the load on the clamping ring 130 is higher. In this regard, by providing a first protrusion 1342 and a second protrusion 1344 on the clamping ring 130, and inserting the first protrusion 1342 and the second protrusion 1344 into the first groove 1142 and the second groove 1144 on the bracket 110, respectively, the bracket 110 can share part of the torsional force for the clamping ring 130, thereby reducing the probability of bending or even breaking of the clamping ring 130, and achieving the technical effect of improving the structural strength of the clamping ring 130 and reducing the failure rate of the clamping ring 130.

[0065] The flat shaft segment 124 forms a limiting groove 122 between the first round shaft segment 123 and the second round shaft segment 125 , and the clamping ring 130 is clamped into the limiting groove 122 .

[0066] In this embodiment, a recessed limiting groove 122 is provided on the peripheral side of the rotating shaft 120. After assembly, the clamping ring 130 is inserted into the limiting groove 122, and the part of the rotating shaft 120 in the limiting groove 122 is inserted into the clamping groove 132, so that the rotating shaft 120 and the clamping ring 130 are nested together.

[0067] By providing a limiting groove 122 for the clamping ring 130 to be inserted into, the clamping ring 130 resting on the bracket 110 can axially position the rotating shaft 120 through the limiting groove 122 to prevent the rotating shaft 120 from moving in the axial direction, thereby improving the structural stability of the hinge assembly 100 and reducing the failure rate of the hinge assembly 100.

[0068] like Figure 1 , Figure 2 , Figure 3 , Fig.13 and Fig.15 As shown, in some embodiments, optionally, the collar 130 is in sheet shape, and the groove 132 penetrates the collar 130 along the axial direction of the collar 130; the groove 132 forms an opening 1322 on the circumferential side of the collar 130; wherein the flat shaft section is inserted into the groove 132 through the opening 1322.

[0069] In this embodiment, the retaining ring 130 is in the form of a sheet. By using the retaining ring 130 in the form of a sheet, the size of the hinge assembly 100 can be shortened in the axial direction of the rotating shaft 120, thereby improving the structural compactness of the hinge assembly 100, providing convenient conditions for the miniaturization and lightweight design of the hinge assembly 100, and enabling the hinge assembly 100 to be suitable for use in handheld electronic devices such as mobile phones and tablet computers.

[0070] On this basis, the clamping groove 132 penetrates the clamping ring 130 along the axial direction of the clamping ring 130, so that the rotating shaft 120 can penetrate the clamping ring 130 in the axial direction of the clamping ring 130, so as to facilitate the insertion of the rotating shaft 120 into the shaft hole 112 on the rear side of the clamping ring 130.

[0071] The clamping groove 132 forms an opening 1322 on the circumferential side of the clamping ring 130, and the shape of the opening 1322 matches the shape of the flat shaft segment on the rotating shaft 120. During the assembly process, the flat shaft segment is inserted into the clamping groove 132 to clamp the clamping ring 130 through the first circular shaft segment and the second circular shaft segment, so that the clamping ring 130 can provide axial positioning for the rotating shaft 120 to prevent the rotating shaft 120 from moving in the axial direction. In this way, the technical effect of improving the matching accuracy of the hinge assembly 100 and improving the structural stability of the hinge assembly 100 is achieved.

[0072] like Figure 8 , Fig. 9 , Fig.10 and Fig.11 As shown, in some embodiments, optionally, the protrusion 134 also includes a second protrusion 1344, and the second protrusion 1344 is located on the side opposite to the opening 1322 of the slot 132; the groove 114 also includes a second groove 1144, and the second protrusion 1344 is embedded in the second groove 1144; wherein the second groove 1144 is located on the peripheral side of the shaft hole 112, and the second groove 1144 is spaced apart from the shaft hole 112.

[0073] In this embodiment, the multiple protrusions 134 corresponding to each slot 132 also include a second protrusion 1344, which is arranged on the side opposite to the opening 1322 of the slot 132. For example, when the opening 1322 of the slot 132 faces upward, the second protrusion 1344 is located below the slot 132.

[0074] Correspondingly, a second groove 1144 is provided on the bracket 110 , and the shape of the second groove 1144 matches the shape of the second protrusion 1344 . After assembly, the second protrusion 1344 is embedded in the second groove 1144 .

[0075] During operation, when the hinge assembly 100 folds inward from the unfolded state to the closed state, the swing arm 140 rotates inward around the rotating shaft 120. Under the action of friction, the swing arm 140 drives the synchronous shaft to rotate accordingly. Fig. 9 The rotating shaft 120 on the left side rotates clockwise, and the rotating shaft 120 on the right side rotates counterclockwise. At this time, the rotating shaft 120 exerts two forces F4 and F5 on the clamping ring 130. The force F4 points to the inner side of the clamping ring 130. The inner side of the clamping ring 130 is not affected by the clamping groove 132, and the structural strength is high, and the risk of fracture is low. The force F5 points to the weak position on the outer side of the clamping ring 130. Under the influence of the force F5, the clamping ring 130 is easy to fracture in the area at the bottom of the clamping groove 132.

[0076] In this regard, by providing a second protrusion 1344 on the clamping ring 130, the second protrusion 1344 is restricted by the second groove 1144 on the bracket 110 during the folding process of the clamping ring 130, thereby generating a resistance force F6 that prevents the clamping ring 130 from deforming. The direction of action of the resistance force F6 is opposite to the direction of action of the force F5, so that the bracket 110 can replace the clamping ring 130 to resist the force F5, thereby reducing the probability of the bottom of the slot 132 breaking, thereby solving the technical problems of poor hinge reliability and high failure rate existing in the related art, and achieving the technical effect of optimizing the structure of the hinge assembly 100, improving the structural stability of the hinge assembly 100, and extending the service life of the hinge assembly 100.

[0077] In this embodiment, the second groove 1144 is opened on the outer ring side of the shaft hole 112 . Specifically, the second groove 1144 is separated from the shaft hole 112 , and the second groove 1144 is located at the edge of the bracket 110 .

[0078] When the hinge assembly 100 is folded inward from the unfolded state to the closed state, the side wall of the first groove 1142 blocks the second protrusion 1344 from turning outward, that is, the side wall of the second groove 1144 generates a resistance force F6 on the second protrusion 1344 .

[0079] On this basis, by setting the second groove 1144 on the outer ring side of the shaft hole 112, the side wall of the second groove 1144 can be moved away from the axis of the shaft hole 112, thereby increasing the force arm of the resistance force F6, and thereby reducing the size of the resistance force F6, thereby reducing the load on the bracket 110 and the clamping ring 130, and achieving the technical effect of improving the structural strength of the bracket 110 and the clamping ring 130 and reducing the probability of breakage of the clamping ring 130.

[0080] like Figure 2 As shown, in some embodiments, optionally, the side of the protrusion 134 facing the rotating shaft 120 includes a first arc surface 1346, and the side of the protrusion 134 facing away from the rotating shaft 120 includes a second arc surface 1348; the diameter of the second arc surface 1348 is greater than the diameter of the first arc surface 1346, and the first arc surface 1346 and the second arc surface 1348 are coaxial.

[0081] In this embodiment, a first arc surface 1346 is provided on the side of the protrusion 134 facing the shaft 120, the diameter of the first arc surface 1346 is larger than the diameter of the shaft 120, and the first arc surface 1346 and the shaft 120 share a common axis. Correspondingly, a second arc surface 1348 is provided on the side of the protrusion 134 facing away from the shaft 120, the diameter of the second arc surface 1348 is larger than the diameter of the first arc surface 1346, and the second arc surface 1348 and the shaft 120 share a common axis. The shape of the groove 114 is adapted to the shape of the protrusion 134.

[0082] Compared with a flat surface or a folded surface, an arc surface has higher strength. By respectively providing a first arc surface 1346 and a second arc surface 1348 on the inner and outer sides of the protrusion 134, the probability of irreversible deformation of the protrusion 134 can be reduced, thereby ensuring that the retaining ring 130 can be fixed to the front end of the bracket 110 through the protrusion 134, thereby ensuring the reliability of the circumferential positioning of the retaining ring 130 on the rotating shaft 120, thereby achieving the technical effect of reducing the failure rate of the hinge assembly 100.

[0083] like Figure 3 and Fig.12 As shown, in some embodiments, optionally, the collar 130 further includes a reinforcing rib 136 , and the reinforcing rib 136 is located on a side of the collar 130 facing away from the bracket 110 ; the reinforcing rib 136 is distributed around the groove 132 .

[0084] In this embodiment, a reinforcing rib 136 is provided on a side of the collar 130 facing away from the bracket 110 , and the reinforcing rib 136 is protruding relative to the surface of the collar 130 .

[0085] By providing reinforcing ribs 136 on the clamping ring 130, the structure of the clamping ring 130 can be reinforced. Specifically, when the clamping ring 130 generates a bending and torsional moment under the action of the rotating shaft 120, the reinforcing ribs 136 can share a part of the bending and torsional moment for the clamping ring 130, thereby reducing the probability of bending or even breaking of the clamping ring 130, thereby achieving the technical effect of improving the structural strength of the clamping ring 130 and reducing the failure rate of the clamping ring 130.

[0086] Specifically, the reinforcing rib 136 is in a strip shape, and the reinforcing rib 136 extends around the slot 132 on all sides thereof.

[0087] The area around the clamping groove 132 is a weak area on the clamping ring 130, and the probability of damage to this area is relatively high under the action of the rotating shaft 120. In this regard, by winding the reinforcing ribs 136 around the outer side of the clamping groove 132, this weak area can be centrally reinforced, thereby reducing the probability of bending or even breaking of the clamping ring 130, achieving the technical effect of improving the structural strength of the clamping ring 130 and reducing the failure rate of the clamping ring 130.

[0088] Specifically, the two slots 132 distributed on the left and right sides of the bracket 110 share the same reinforcing rib 136 .

[0089] like Figure 3 and Fig.12 As shown, in some embodiments, optionally, the reinforcing rib 136 is strip-shaped, and the reinforcing rib 136 includes two reinforcing segments 1362 and a connecting segment 1364 ; the reinforcing segments 1362 are arranged around the slots 132 , and the connecting segment 1364 is located between the two slots 132 , and the connecting segment 1364 connects the two reinforcing segments 1362 .

[0090] In this embodiment, the reinforcing rib 136 is in a strip shape, and includes two reinforcing sections 1362 and a connecting section 1364 .

[0091] Among them, the reinforcing section 1362 is arc-shaped, and the reinforcing section 1362 is arranged around the card slot 132. By arranging the arc-shaped reinforcing section 1362 around the card slot 132, the bending and torsion resistance of the two ends of the clamping ring 130 can be improved. In the process of the hinge assembly 100 driving the shell to switch from the folded state to the unfolded state, the reinforcing section 1362 can resist part of the bending and torsion moment for the clamping ring 130, so as to reduce the probability of the clamping ring 130 turning outward, and ensure that the bracket 110 can provide circumferential positioning for the rotating shaft 120 through the clamping ring 130. On this basis, by arranging the connecting section 1364 between the two reinforcing sections 1362, the two reinforcing sections 1362 can be connected as a whole, thereby reducing the stress on the reinforcing section 1362, avoiding the reinforcing section 1362 from being damaged due to stress concentration, and then achieving the technical effect of improving the structural strength of the clamping ring 130 and reducing the failure rate of the clamping ring 130.

[0092] like Fig.11 , Fig.12 and Fig.13 As shown, in some embodiments, optionally, the swing arm 140 includes a first virtual swing arm 141 and a second virtual swing arm 142 which are symmetrically arranged, the first virtual swing arm 141 and the second virtual swing arm 142 are connected to the keel bracket 110 and the pressure cover 154 through bearings, the first virtual swing arm 141 is connected to the first support frame 150 through a sliding rail, the first support frame 150 is used to connect to the first shell, the second virtual swing arm 142 is connected to the second support frame 152 through a sliding rail, and the second support frame 152 is used to connect to the second shell.

[0093] The swing arm 140 also includes a first synchronous swing arm 143 and a second synchronous swing arm 144 symmetrically arranged. The first support frame 150 is slidably connected to the first synchronous swing arm 143 through a double sliding groove structure, and the second support frame 152 is slidably connected to the second synchronous swing arm 144 through a double sliding groove structure.

[0094] After assembly is completed, the angle of the first support frame 150 is controlled by the first synchronous swing arm 143, and the position of the first support frame 150 on the first synchronous swing arm 143 is controlled by the first virtual swing arm 141. Correspondingly, the angle of the second support frame 152 is controlled by the second synchronous swing arm 144, and the position of the second support frame 152 on the second synchronous swing arm 144 is controlled by the second virtual swing arm 142.

[0095] The swing arm 140 further includes a third synchronous swing arm 145 and a fourth synchronous swing arm 146 . The first synchronous swing arm 143 and the third synchronous swing arm 145 are sleeved on one of the rotating shafts 120 , and the second synchronous swing arm 144 and the fourth synchronous swing arm 146 are sleeved on the other rotating shaft 120 .

[0096] A spring 162 and a cam seat are provided between the first synchronous swing arm 143 and the third synchronous swing arm 145, and a spring 162 and a cam seat are also provided between the second synchronous swing arm 144 and the fourth synchronous swing arm 146, so that torque is provided by the spring 162 and the cam seat. A first tooth portion is provided on the first synchronous swing arm 143 and the third synchronous swing arm 145, and a second tooth portion is provided on the second synchronous swing arm 144 and the fourth synchronous swing arm 146. The first tooth portion and the second tooth portion are transmitted through two gears 167, so that the synchronous swing arms 140 on both sides can rotate in a mirror image, thereby realizing the synchronization function of the hinge assembly 100.

[0097] The first synchronous swing arm 143 and the third synchronous swing arm 145 are connected by the first connecting rod 147 and the first connecting shaft 1472, so as to ensure that the position of the first virtual swing arm 141 on the first support frame 150 is constrained by the first synchronous swing arm 143 and the third synchronous swing arm 145, so as to achieve precise positioning. Similarly, the second synchronous swing arm 144 and the fourth synchronous swing arm 146 are connected by the second connecting rod 148 and the second connecting shaft 1482, so as to ensure that the position of the second virtual swing arm 142 on the second support frame 152 is constrained by the second synchronous swing arm 144 and the fourth synchronous swing arm 146, so as to achieve precise positioning.

[0098] A fixing frame 168 is provided on the side of the first synchronous swing arm 143 and the second synchronous swing arm 144 facing away from the spring 162 . The fixing frame 168 can position the two gears 167 . The fixing frame 168 is fixed to the keel of the hinge assembly 100 by a second screw 169 .

[0099] A bracket 110 is disposed between the third synchronous swing arm 145 and the fourth synchronous swing arm 146. The bracket 110 is sleeved on the rotating shaft 120. A collar 130 is installed on the side of the bracket 110 facing away from the third synchronous swing arm 145 and the fourth synchronous swing arm 146. The bracket 110 is fixed to the keel of the hinge assembly 100 by a first screw 166.

[0100] A second cam seat 164 is installed between the first synchronous swing arm 143 and the third synchronous swing arm 145, and a first cam seat 160 is installed between the second synchronous swing arm 144 and the fourth synchronous swing arm 146. Two springs 162 are installed between the first cam seat 160 and the second cam seat 164. One end of the spring 162 is fixed on the rotating shaft 120, and the other end of the spring 162 is fixed on the first cam seat 160 or the second cam seat 164.

[0101] In one embodiment of the present application, an electronic device is proposed, which includes: a first shell, a second shell and a hinge assembly 100 in any of the above embodiments; the first shell and the second shell are rotatably connected by the hinge assembly 100 to enable the electronic device to switch between an unfolded state and a folded state.

[0102] In this embodiment, an electronic device provided with the hinge assembly 100 in any of the above embodiments is defined. Therefore, the electronic device has the advantages possessed by the hinge assembly 100 in any of the above embodiments, and can achieve the technical effects that can be achieved by the hinge assembly 100 in any of the above embodiments. To avoid repetition, it will not be described here.

[0103] On this basis, the electronic device also includes two shells, which are rotatably connected through a hinge assembly 100, so that the two shells can perform outward extension and inward folding actions through the hinge assembly 100, so that the electronic device 100 can switch freely between an unfolded state and a folded state.

[0104] The electronic device may be a terminal or other device other than a terminal. Exemplarily, the electronic device may be a mobile phone, a tablet computer, a laptop computer, a PDA, an in-vehicle electronic device, a mobile Internet device (MID), an augmented reality (AR) / virtual reality (VR) device, a robot, a wearable device, an ultra-mobile personal computer (UMPC), a netbook or a personal digital assistant (PDA), etc. It may also be a personal computer (PC), a television (TV), a teller machine or a self-service machine, etc., which is not specifically limited in the embodiments of the present application.

[0105] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0106] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A hinge assembly, characterized in that: include: A bracket, the bracket comprising an axial hole and a groove; A rotating shaft, the rotating shaft is passed through the shaft hole; A clamping ring, the clamping ring comprises a clamping groove, the rotating shaft is clamped into the clamping groove, the side of the clamping ring facing the bracket comprises a protrusion, and the protrusion is embedded in the groove; A swing arm is sleeved on the rotating shaft, the swing arm can rotate around the rotating shaft, and the swing arm is located on a side of the bracket facing away from the clamping ring.

2. The hinge assembly according to claim 1, characterized in that: The bracket is an axisymmetric structure, and two axis holes are arranged on the bracket, and the two axis holes are symmetrically arranged along the axis of the bracket; The clamping ring comprises two clamping grooves, the two clamping grooves correspond to the two shaft holes one by one, and the shapes of the clamping grooves are different from the shapes of the shaft holes; A plurality of protrusions are arranged corresponding to each of the slots, and the plurality of protrusions are spaced apart in the circumferential direction of the slots. A plurality of grooves are arranged corresponding to each of the axial holes, and the plurality of grooves correspond to the plurality of protrusions one by one.

3. The hinge assembly according to claim 2, characterized in that: The protrusions include a first protrusion, and the first protrusion is located on a side of the corresponding card slot facing away from the other card slot; The groove includes a first groove, the first groove is located at a peripheral side of the shaft hole, the first groove is communicated with the shaft hole, and the first protrusion is embedded in the first groove.

4. The hinge assembly according to claim 2, characterized in that: The rotating shaft comprises a first circular shaft segment, a flat shaft segment and a second circular shaft segment, the flat shaft segment is located between the first circular shaft segment and the second circular shaft segment, the first circular shaft segment is inserted into the shaft hole, and the flat shaft segment is snapped into the snap-in groove.

5. The hinge assembly according to claim 4, characterized in that: The clamping ring is in sheet shape, and the clamping groove penetrates the clamping ring along the axial direction of the clamping ring; The clamping groove forms an opening on the circumferential side of the clamping ring, and the flat shaft section is inserted into the clamping groove through the opening.

6. The hinge assembly according to claim 5, characterized in that: The protrusion also includes a second protrusion, and the second protrusion is located on a side opposite to the opening of the card slot; The groove further includes a second groove, and the second protrusion is embedded in the second groove; Wherein, the second groove is located at the peripheral side of the shaft hole, and the second groove is spaced apart from the shaft hole.

7. The hinge assembly according to claim 2, characterized in that: The side of the protrusion facing the rotating shaft includes a first arc surface, and the side of the protrusion facing away from the rotating shaft includes a second arc surface; The diameter of the second arc surface is greater than the diameter of the first arc surface, and the first arc surface and the second arc surface are coaxial.

8. The hinge assembly according to any one of claims 1 to 7, characterized in that: The clamp ring further comprises a reinforcing rib, and the reinforcing rib is located on a side of the clamp ring facing away from the bracket; The reinforcing ribs are distributed around the slot.

9. The hinge assembly according to claim 8, characterized in that The reinforcing rib is in strip shape, and comprises two reinforcing sections and a connecting section; The reinforcing section is arranged around the slot, the connecting section is located between the two slots, and the connecting section connects the two reinforcing sections.

10. An electronic device, characterized in that: comprising a first housing, a second housing and a hinge assembly as claimed in any one of claims 1 to 9; The first shell and the second shell are rotatably connected via the hinge assembly so that the electronic device can be switched between an unfolded state and a folded state.

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