Hinge mechanism and electronic device
By providing a sliding fit structure with arcuate grooves and arcuate projections in the hinge mechanism, the problems of low stability and large space occupation are solved, higher stability and smaller volume are achieved, and the miniaturization of electronic equipment is promoted.
Patent Information
- Application Number
- CN202411735645.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-02-25
AI Technical Summary
The existing hinge mechanism has low stability during folding or unfolding and takes up a large space, which affects the development of miniaturization of electronic equipment.
By setting different arc grooves and arc bumps between the swing arm and the base of the hinge mechanism, the sliding coordination between the arc bumps and arc bumps is achieved, the connection structure between the swing arm and the frame bracket is simplified, the mating tolerance is reduced, and the sliding connection structure is removed, thereby improving stability and miniaturization ability.
The stability of the hinge mechanism during folding and deployment is improved, space occupation in the thickness direction is reduced, and it is conducive to the miniaturization of electronic equipment.
Smart Images
Figure CN119508339A_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the field of communication technology, and specifically relates to a hinge mechanism and an electronic device. Background Art
[0002] With the development of science and technology, people are becoming more and more dependent on electronic devices. In order to improve the portability and comfort of electronic devices, the application scope of foldable electronic devices is becoming wider and wider.
[0003] In the related art, a foldable electronic device relies on a hinge mechanism to achieve folding and unfolding. The hinge mechanism includes a base, a swing arm and a frame bracket. The swing arm is rotatably connected to the base, and the frame bracket is slidably connected to the swing arm. In the process of the hinge mechanism switching from an unfolded state to a folded state, the swing arm rotates a certain angle relative to the base. At the same time, the frame bracket slides relative to the swing arm to prevent the display screen of the foldable electronic device from being wrinkled at the hinge mechanism.
[0004] However, the connection structure between the base, the swing arm and the frame bracket is relatively complicated. It is necessary to realize the rotation connection between the base and the swing arm, and to realize the sliding cooperation between the frame bracket and the swing arm. In order to avoid the hinge mechanism from getting stuck during the unfolding or folding process, the matching tolerance between the two connected parts is large, resulting in reduced stability of the hinge mechanism during the folding and unfolding process. Moreover, due to the sliding cooperation between the frame bracket and the swing arm, the hinge mechanism occupies a large space in the thickness direction, which is not conducive to the miniaturization of electronic equipment. Summary of the invention
[0005] The purpose of the embodiments of the present application is to provide a hinge mechanism and an electronic device, which can solve the problem of low stability of the hinge mechanism during folding or unfolding in the related art.
[0006] In a first aspect, an embodiment of the present application provides a hinge mechanism, comprising a base and a swing arm, wherein the swing arm is rotatably connected to the base, one of the swing arm and the base is provided with a first arc groove and a second arc groove connected thereto, and the other is provided with a first arc protrusion and a second arc protrusion connected thereto, the curvature radius of the first arc groove is smaller than the curvature radius of the second arc groove, the first arc protrusion slides in the first arc groove, and the second arc protrusion slides in the second arc groove, The hinge mechanism has an unfolded state and a folded state. When the hinge mechanism switches from the unfolded state to the folded state, the hinge mechanism is successively in a first mating state and a second mating state. When the hinge mechanism is in the first mating state, the first arcuate groove and the first arcuate protrusion are slidably mated; when the hinge mechanism is in the second mating state, the second arcuate groove and the second arcuate protrusion are slidably mated.
[0007] In a second aspect, an embodiment of the present application further provides an electronic device, comprising a first device body, a second device body and the above-mentioned hinge mechanism, wherein the first device body is connected to the second device body through the hinge mechanism; During the relative rotation of the first device body and the second device body, the electronic device switches between an unfolded state and a folded state.
[0008] In the embodiment of the present application, the swing arm and the base are matched through different arc-shaped protrusions and arc-shaped grooves. During the unfolding process of the hinge mechanism, the first arc-shaped protrusion first slides with the first arc-shaped groove, and then the second arc-shaped protrusion slides with the second arc-shaped groove. Moreover, the curvature radius of the first arc-shaped groove is smaller than the curvature radius of the second arc-shaped groove. Then, in the process of the swing arm switching from the first arc-shaped groove to the second arc-shaped groove, the swing arm moves a distance away from its own rotation axis, that is, the swing arm can directly drive the frame support to move away from the rotation axis. The swing arm does not need to be slidably connected with the frame support, which is conducive to simplifying the connection structure between the swing arm and the frame support. Then, the rotation process and the sliding process will not affect each other, and the matching tolerance between the swing arm and the base can be set to be smaller, thereby improving the stability of the hinge mechanism during the folding and unfolding process. Moreover, since the swing arm and the frame support do not need to be provided with a sliding connection structure, the space occupied by the hinge mechanism in the thickness direction is reduced, which is conducive to the miniaturization of electronic equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 is a schematic diagram of the cooperation between the base and the swing arm when the hinge mechanism is in an unfolded state according to an embodiment of the present application; Figure 2 It is a schematic diagram of the cooperation between the base and the swing arm when the hinge mechanism switches from the first cooperation state to the second cooperation state disclosed in the embodiment of the present application; Figure 3 is a schematic diagram of the cooperation between the base and the swing arm when the hinge mechanism is in a folded state according to an embodiment of the present application; Figure 4 It is a schematic diagram of the structure of the swing arm disclosed in the embodiment of the present application; Figure 5 is a front view of the swing arm disclosed in the embodiment of the present application; Figure 6 is a schematic diagram of a partial structure of a first arc-shaped protrusion disclosed in an embodiment of the present application; Figure 7 It is a schematic diagram of the structure of the base disclosed in the embodiment of the present application; Figure 8 It is a front view of a partial structure of a base disclosed in an embodiment of the present application; Fig. 9is a schematic diagram of a partial structure of a first arc-shaped groove disclosed in an embodiment of the present application; Fig.10 It is one of the schematic diagrams of the partial structure of the second arc-shaped groove disclosed in the embodiment of the present application; Fig.11 This is the second schematic diagram of the partial structure of the second arc-shaped groove disclosed in the embodiment of the present application; Fig.12 is a schematic diagram of the structure of an electronic device in an unfolded state disclosed in an embodiment of the present application; Fig.13 It is a schematic diagram of the structure of an electronic device in a folded state disclosed in an embodiment of the present application.
[0010] Description of reference numerals: 100-base, 110-first arc-shaped groove, 111-first limiting guide portion, 112-second limiting guide portion, 110a-guide channel, 120-second arc-shaped groove, 120a-first groove wall surface, 120b-second groove wall surface, 121-avoiding recess, 200-swing arm, 210-first arc-shaped protrusion, 211-protrusion structure, 220-second arc-shaped protrusion, A-first rotation direction, α-first angle, β-second angle, 300-frame bracket, 410-first device body, 420-second device body, 500-Display screen. DETAILED DESCRIPTION
[0011] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.
[0012] 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.
[0013] The hinge mechanism and electronic device provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in combination with the accompanying drawings.
[0014] Please refer to Figure 1-Figure 13 The hinge mechanism disclosed in the embodiment of the present application includes a base 100 and a swing arm 200, and the swing arm 200 is rotatably connected to the base 100, wherein the base 100 serves as a basic component of the hinge mechanism and is used to install the swing arm 200 and other components of the hinge mechanism. The swing arm 200 is located on the side of the base 100, and the swing arm 200 can rotate relative to the base 100, thereby realizing the folding and unfolding of the hinge mechanism.
[0015] Specifically, one of the swing arm 200 and the base 100 is provided with a first arc groove 110 and a second arc groove 120 connected to each other, and the other is provided with a first arc protrusion 210 and a second arc protrusion 220 connected to each other, the first arc protrusion 210 slides in the first arc groove 110, and the second arc protrusion 220 slides in the second arc groove 120. Alternatively, the swing arm 200 may be provided with the first arc groove 110 and the second arc groove 120, and the base 100 may be provided with the first arc protrusion 210 and the second arc protrusion 220, or the swing arm 200 may be provided with the first arc protrusion 210 and the second arc protrusion 220, and the base 100 may be provided with the first arc groove 110 and the second arc groove 120.
[0016] Moreover, the radius of curvature of the first arc-shaped groove 110 is smaller than the radius of curvature of the second arc-shaped groove 120 , that is, the curvature of the first arc-shaped groove 110 is greater than the curvature of the second arc-shaped groove 120 , and the curvature of the first arc-shaped groove 110 is greater than the curvature of the second arc-shaped groove 120 .
[0017] The hinge mechanism has an unfolded state and a folded state. During the process of switching from the unfolded state to the folded state, the hinge mechanism is in a first mating state and a second mating state respectively. When the hinge mechanism is in the first mating state, the first arc groove 110 and the first arc protrusion 210 are slidably mated; when the hinge mechanism is in the second mating state, the second arc groove 120 and the second arc protrusion 220 are slidably mated.
[0018] That is to say, during the unfolding process of the hinge mechanism, the first arc-shaped protrusion 210 first slides with the first arc-shaped groove 110, and then the second arc-shaped protrusion 220 slides with the second arc-shaped groove 120. Since the curvature radius of the first arc-shaped groove 110 is smaller than the curvature radius of the second arc-shaped groove 120, the swing arm 200 first slides along the first arc-shaped groove 110 with a smaller curvature radius, and then slides along the second arc-shaped groove 120 with a larger curvature radius.
[0019] In the embodiment of the present application, the swing arm 200 cooperates with the base 100 through different arc-shaped protrusions and arc-shaped grooves. In the process of the swing arm 200 switching from cooperating with the first arc-shaped groove 110 to cooperating with the second arc-shaped groove 120, the swing arm 200 moves a distance away from its own rotation axis, that is, the swing arm 200 can directly drive the frame support 300 to move away from the rotation axis. The swing arm 200 does not need to be slidably connected with the frame support 300, which is conducive to simplifying the connection structure between the swing arm 200 and the frame support 300. Then, the rotation process and the sliding process will not affect each other, and the matching tolerance between the swing arm 200 and the base 100 can be set to be smaller, thereby improving the stability of the hinge mechanism during the folding and unfolding process. Moreover, since the swing arm 200 and the frame support 300 do not need to be provided with a sliding connection structure, the space occupied by the hinge mechanism in the thickness direction is reduced, which is conducive to the miniaturization of electronic equipment.
[0020] In an optional embodiment, when the hinge mechanism switches from the unfolded state to the folded state, the swing arm 200 rotates in the first rotation direction A, and the curvature radius of the first arc-shaped groove 110 is constant. Optionally, the first arc-shaped groove 110 may be an arc-shaped structure.
[0021] In another embodiment, the radius of curvature of the first arc-shaped groove 110 increases along the first rotation direction A. That is, along the first rotation direction A, the curvature of the first arc-shaped groove 110 decreases, and the curvature degree of the first arc-shaped groove 110 decreases. However, the radius of curvature of each part of the first arc-shaped groove 110 is smaller than the radius of curvature of the second arc-shaped groove 120. Optionally, the first arc-shaped groove 110 adopts a non-arc-shaped structure, and the second arc-shaped groove 120 adopts an arc-shaped structure.
[0022] By adopting this embodiment, during the unfolding process of the hinge mechanism, the first arc-shaped protrusion 210 cooperates with the first arc-shaped groove 110, so that the swing arm 200 can gradually move away from the rotation axis, and the rotation radius of the swing arm 200 increases, thereby making the second arc-shaped protrusion 220 and the second arc-shaped groove 120 slide and cooperate smoothly, which is more conducive to the swing arm 200 to smoothly switch from the first cooperation state to the second cooperation state.
[0023] In an optional embodiment, in the direction of the rotation axis surrounding the swing arm 200, the first arc-shaped protrusion 210 is connected to the second arc-shaped protrusion 220, and the first arc-shaped groove 110 is connected to the second arc-shaped groove 120, that is, the first arc-shaped groove 110 and the second arc-shaped groove 120 are connected to form one arc-shaped groove.
[0024] In another embodiment, reference Figure 4 and Figure 5 As shown, in the direction of the rotation axis of the swing arm 200, the first arc-shaped protrusion 210 is connected to the second arc-shaped protrusion 220, referring to Figure 7As shown, the first arc groove 110 is connected to the second arc groove 120, and the first arc groove 110 and the second arc groove 120 extend around the direction of the rotation axis respectively. Optionally, the first arc protrusion 210 and the second arc protrusion 220 can be a split structure or an integrated structure.
[0025] In this embodiment, the connection direction between the first arc-shaped protrusion 210 and the second arc-shaped protrusion 220 and the communication direction between the first arc-shaped groove 110 and the second arc-shaped groove 120 are both the direction of the rotation axis of the swing arm 200. Therefore, different arc-shaped grooves and arc-shaped protrusions are matched in the axial direction of the swing arm 200 to achieve multi-layer matching, which is beneficial to increase the matching area between the swing arm 200 and the base 100 and improve the stability of the swing arm 200 during rotation.
[0026] Optionally, during the sliding fit between the first arcuate protrusion 210 and the first arcuate groove 110, the second arcuate protrusion 220 will also slide in the second arcuate groove 120, and an avoidance gap can be set between the second arcuate protrusion 220 and the second arcuate groove 120 to prevent the second arcuate protrusion 220 from directly sliding with the second arcuate groove 120 and affecting the sliding fit between the first arcuate protrusion 210 and the first arcuate groove 110. Similarly, during the sliding fit between the second arcuate protrusion 220 and the first arcuate groove 110, the first arcuate protrusion 210 will also slide in the first arcuate groove 110, and an avoidance gap can be set between the first arcuate protrusion 210 and the second arcuate groove 120 to prevent the first arcuate protrusion 210 from continuously sliding with the first arcuate groove 110 and affecting the sliding fit between the second arcuate protrusion 220 and the second arcuate groove 120.
[0027] In an alternative embodiment, reference Figure 1-Figure 3 , during the sliding cooperation between the first arc groove 110 and the first arc protrusion 210, the rotation angle of the swing arm 200 is the first angle α; during the sliding cooperation between the second arc groove 120 and the first arc protrusion 210, the rotation angle of the swing arm 200 is the second angle β, and the second angle β is greater than the first angle α, or the second angle β is less than the first angle α. The embodiment of the present application does not limit the specific range of the first angle α and the second angle β.
[0028] Optionally, refer to Figure 5As shown, the thickness of the first arc-shaped protrusion 210 is less than the thickness of the second arc-shaped protrusion 220. Further optionally, the thickness of the first arc-shaped protrusion 210 is m=0.42mm, and the thickness of the second arc-shaped protrusion 220 is n=0.66mm. It should be noted that the "thickness" here refers to the size of the first arc-shaped protrusion 210 and the second arc-shaped protrusion 220 in the first direction, and the first direction is perpendicular to the rotation axis of the swing arm 200; the curvature corresponding to the first arc-shaped groove 110 is 1.62, and the curvature corresponding to the second arc-shaped groove 120 is 1.64. The width of the first arc-shaped groove 110 is less than the width of the second arc-shaped groove 120. Further optionally, the width of the first arc-shaped groove 110 is 0.55mm, and the width of the second arc-shaped groove 120 is 0.7mm. It should be noted that the "width" here refers to the size of the first arc-shaped groove 110 and the second arc-shaped groove 120 in the first direction. Of course, the thicknesses of the first arc-shaped protrusion 210 and the second arc-shaped protrusion 220 , and the widths of the first arc-shaped groove 110 and the second arc-shaped groove 120 may also adopt other values.
[0029] In this embodiment, when the hinge mechanism switches from the first mating state to the second mating state, the swing arm 200 moves 0.11 mm in a direction away from its own rotation axis.
[0030] In a further embodiment, a first arc groove 110 and a second arc groove 120 are provided on both sides of the base 100, and the number of the swing arms 200 is at least two, wherein the two swing arms 200 are respectively located on both sides of the base 100, and each swing arm 200 is provided with a first arc protrusion 210 and a second arc protrusion 220, and each swing arm 200 is rotatably connected to the base 100 through the matching first arc groove 110 and the first arc protrusion 210, and the matching second arc groove 120 and the second arc groove 120.
[0031] In the scheme of this application, reference is made to Figure 5 As shown, one of the groove wall surface of the first arc-shaped groove 110 and the surface of the first arc-shaped protrusion 210 is provided with a protrusion structure 211. When the hinge mechanism is in the first mating state, the other of the groove wall surface of the first arc-shaped groove 110 and the surface of the first arc-shaped protrusion 210 contacts the protrusion structure 211. The protrusion structure 211 can be a block protrusion, a strip protrusion, etc. The block protrusion can be a square protrusion, a round protrusion, etc. The embodiment of the present application does not limit the specific shape of the protrusion structure 211.
[0032] Optionally, the protruding structure 211 and the swing arm 200 or the base 100 on which it is provided are formed into an integrated structure by injection molding or the like. Of course, the protruding structure 211 and the swing arm 200 or the base 100 on which it is provided may also be a split structure, and the two are connected by welding, bonding or the like.
[0033] Optionally, the groove wall surface of the first arc-shaped groove 110 may be provided with a protrusion structure 211, and when the hinge mechanism is in the first mating state, the first arc-shaped protrusion 210 contacts the protrusion structure 211; or the surface of the first arc-shaped protrusion 210 may be provided with a protrusion structure 211, and when the hinge mechanism is in the first mating state, the first arc-shaped groove 110 contacts the protrusion structure 211.
[0034] By adopting this embodiment, the protrusion structure 211 contacts the groove wall of the first arcuate groove 110 or the first arcuate protrusion 210, so that the first arcuate groove 110 and the first arcuate protrusion 210 achieve point contact, which is beneficial to reducing the contact area between the first arcuate groove 110 and the first arcuate protrusion 210, avoiding the swing arm 200 from being stuck during the rotation process, and facilitating the swing arm 200 to smoothly switch from the first mating state to the second mating state.
[0035] Of course, in other embodiments, the groove wall surface of the first arc-shaped groove 110 and the surface of the first arc-shaped protrusion 210 may not be provided with the protrusion structure 211 , and the first arc-shaped groove 110 is in direct contact with the first arc-shaped protrusion 210 .
[0036] In an optional embodiment, the number of the protruding structure 211 is one.
[0037] In another embodiment, at least two protrusion structures 211 are arranged at intervals in the rotation direction of the swing arm 200. Optionally, a plurality of protrusion structures 211 are arranged at intervals in the direction in which the first arc-shaped protrusion 210 extends, and the plurality of protrusion structures 211 may be evenly distributed or unevenly distributed, and the structures of the plurality of protrusion structures 211 may be the same or different.
[0038] With this embodiment, the number of the protrusion structures 211 is increased. Through the multiple protrusion structures 211, different positions of the first arc-shaped groove 110 can respectively achieve point contact with different positions of the first arc-shaped protrusion 210, which can not only prevent the swing arm 200 from getting stuck during rotation, but also ensure that the first arc-shaped protrusion 210 and the first arc-shaped groove 110 slide and cooperate smoothly, thereby ensuring the rotation stability of the swing arm 200.
[0039] In an optional embodiment, reference Figure 5 As shown, a protrusion structure 211 is provided on one side of the first arc-shaped protrusion 210. Optionally, the first arc-shaped protrusion 210 has an inner surface and an outer surface, and the protrusion structure 211 can be provided on the inner surface or the outer surface. Optionally, the height of the protrusion structure 211 protruding from the surface of the first arc-shaped protrusion 210 is L, L=0.045mm, and of course, the height L can also be other values.
[0040] In another embodiment, reference Figure 6As shown, the surfaces opposite to each other of the first arc-shaped protrusion 210 are respectively provided with protrusion structures 211. That is, both the inner surface and the outer surface of the first arc-shaped protrusion 210 are provided with protrusion structures 211. Optionally, the surfaces opposite to each other of the first arc-shaped protrusion 210 are respectively provided with a protrusion structure 211, or at least two protrusion structures 211 are respectively provided at intervals on the surfaces opposite to each other of the first arc-shaped protrusion 210.
[0041] By adopting this embodiment, the distribution area of the protrusion structure 211 is increased, and the inner surface of the first arc-shaped protrusion 210 is in point contact with the groove wall surface of the first arc-shaped groove 110 through the protrusion structure 211. At the same time, the outer surface of the first arc-shaped protrusion 210 is in point contact with the groove wall surface of the first arc-shaped groove 110 through the protrusion structure 211, which is more conducive to the smooth sliding cooperation between the first arc-shaped protrusion 210 and the first arc-shaped groove 110, and is beneficial to improving the rotational stability of the swing arm 200.
[0042] In the scheme of this application, reference is made to Fig. 9 As shown, the groove wall surface of the first arc-shaped groove 110 is provided with a limiting guide portion, and the first arc-shaped protrusion 210 can slide along the limiting guide portion to switch the hinge mechanism from the first matching state to the second matching state. Optionally, the limiting guide portion can be a strip structure, and the embodiment of the present application does not limit the specific structure of the limiting guide portion, and it can guide the sliding mode of the first arc-shaped protrusion 210; the limiting guide portion has a curved surface, and the curved surface of the limiting guide portion is smoothly connected to the groove wall surface of the first arc-shaped groove 110.
[0043] In this embodiment, a limiting guide portion is additionally provided on the groove wall surface of the first arc-shaped groove 110, and the limiting guide portion is utilized to guide the sliding direction of the first arc-shaped protrusion 210, that is, to guide the rotation direction of the swing arm 200, which is beneficial for the hinge mechanism to smoothly switch from the first mating state to the second mating state, thereby realizing the sliding mating of the second arc-shaped protrusion 220 and the second arc-shaped groove 120, and is more beneficial for the smooth rotation of the swing arm 200.
[0044] Of course, in other embodiments, the groove wall surface of the first arc-shaped groove 110 may not be provided with a limiting guide portion, and the groove wall surface of the first arc-shaped groove 110 is directly connected to the groove wall surface of the second arc-shaped groove 120 .
[0045] In an optional embodiment, the number of the limiting guide portion is one, and one of the groove wall surfaces of the first arc-shaped groove 110 is provided with the limiting guide portion.
[0046] In another embodiment, reference Fig. 9As shown, there are at least two limiting guide parts, including a first limiting guide part 111 and a second limiting guide part 112 opposite to each other, and a guide channel 110a is formed between the first limiting guide part 111 and the second limiting guide part 112, and the first arc-shaped protrusion 210 can slide along the guide channel 110a. In other words, the two opposite groove walls of the first arc-shaped groove 110 are respectively provided with limiting guide parts.
[0047] Optionally, the number of the limiting guide parts can be two, namely, the first limiting guide part 111 and the second limiting guide part 112. Of course, the number of the limiting guide parts can be more, and other limiting guide parts can be included in addition to the first limiting guide part 111 and the second limiting guide part 112. The surface of the first limiting guide part 111 is smoothly connected to the first groove wall surface 120a, and the surface of the second limiting guide part 112 is smoothly connected to the second groove wall surface 120b.
[0048] With this embodiment, the number of limiting guide parts is increased, and different limiting guide parts are used to provide guidance for different areas of the first arc-shaped protrusion 210, thereby limiting the overall sliding direction of the first arc-shaped protrusion 210, which is more conducive to the hinge mechanism switching from the first mating state to the second mating state smoothly, and is conducive to the smooth rotation of the swing arm 200.
[0049] In the scheme of this application, reference is made to Fig.10 and Fig.11 As shown, the groove wall surface of the second arc groove 120 is provided with a void-avoiding recess 121. When the hinge mechanism is in the first mating state, that is, when the first arc-shaped protrusion 210 and the first arc groove 110 are slidably mated, the second arc-shaped protrusion 220 is opposite to the void-avoiding recess 121. Optionally, the void-avoiding recess 121 can be a groove, and the groove wall surface of the groove is smoothly connected to the groove wall surface of the second arc groove 120. Of course, the groove wall surface of the groove may not be smoothly connected to the groove wall surface of the second arc groove 120. The embodiment of the present application does not limit the specific structure of the void-avoiding recess 121.
[0050] With this embodiment, during the sliding fit between the first arcuate protrusion 210 and the first arcuate groove 110, since the second arcuate protrusion 220 is opposite to the air avoidance recess 121, the second arcuate protrusion 220 and the groove wall of the second arcuate groove 120 will not directly contact each other, i.e., the sliding fit between the second arcuate protrusion 220 and the second arcuate groove 120 affecting the sliding fit between the first arcuate protrusion 210 and the first arcuate groove 110 is avoided, which is beneficial to the smooth sliding fit between the first arcuate protrusion 210 and the first arcuate groove 110.
[0051] In an optional embodiment, the second arc-shaped groove 120 includes a first groove wall surface 120 a and a second groove wall surface 120 b opposite to each other, and a void-avoiding recess 121 is provided on the first groove wall surface 120 a or the second groove wall surface 120 b.
[0052] In another embodiment, reference Fig.10 and Fig.11 As shown, both the first groove wall surface 120a and the second groove wall surface 120b are provided with a void-avoiding recess 121 .
[0053] By adopting this embodiment, the number of the air-avoiding recesses 121 is increased, and the two opposite groove walls of the second arc-shaped groove 120 are both provided with air-avoiding recesses 121. Therefore, in the process of sliding cooperation between the first arc-shaped protrusion 210 and the first arc-shaped groove 110, the two opposite surfaces of the second arc-shaped protrusion 220 will not contact the first groove wall 120a and the second groove wall 120b, further avoiding the contact between the second arc-shaped protrusion 220 and the second arc-shaped groove 120, and can also avoid affecting the sliding cooperation between the first arc-shaped protrusion 210 and the first arc-shaped groove 110, which is more conducive to the smooth sliding cooperation between the first arc-shaped protrusion 210 and the first arc-shaped groove 110.
[0054] Based on the hinge mechanism disclosed in this application, refer to Fig.12 and Fig.13 As shown, an embodiment of the present application also discloses an electronic device, which includes a first device body 410, a second device body 420 and the above-mentioned hinge mechanism, and the first device body 410 is connected to the second device body 420 through the hinge mechanism; during the relative rotation of the first device body 410 and the second device body 420, the electronic device switches between an unfolded state and a folded state.
[0055] By adopting this embodiment, the hinge mechanism of the electronic device is provided with different arc-shaped protrusions and arc-shaped grooves, so that the swing arm 200 moves a distance away from its own rotation axis during the folding process. The swing arm 200 no longer needs to be slidably connected to the frame bracket 300, which is conducive to simplifying the connection structure between the swing arm 200 and the frame bracket 300, which is conducive to simplifying the structure of the electronic device, realizing the miniaturization of the electronic device, and is conducive to the stability of the electronic device during the folding and unfolding process.
[0056] In an alternative embodiment, reference Fig.12 The electronic device is shown in an unfolded state, with reference to Fig.13 The electronic device in the folded state shown in the figure further includes at least two frame supports 300, the swing arm 200 located on the first side of the base 100 is connected to the first device body 410 through one of the frame supports 300, and the swing arm 200 located on the second side of the base 100 is connected to the second device body 420 through the other frame support 300. In this way, during the relative rotation of the first device body 410 and the second device body 420, the swing arms 200 located on both sides of the base 100 are driven to rotate relatively through the frame support 300, thereby realizing the folding and unfolding of the electronic device.
[0057] Optionally, the electronic device further includes a display screen 500, a first portion of the display screen 500 is connected to the first device body 410, and a second portion of the display screen 500 is connected to the second device body 420. In this arrangement, the display screen 500 can be flattened and folded by relatively rotating the first device body 410 and the second device body 420.
[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 mechanism, characterized in that: The invention comprises a base (100) and a swing arm (200), wherein the swing arm (200) is rotatably connected to the base (100), one of the swing arm (200) and the base (100) is provided with a first arc groove (110) and a second arc groove (120) connected to each other, and the other is provided with a first arc protrusion (210) and a second arc protrusion (220) connected to each other, the curvature radius of the first arc groove (110) is smaller than the curvature radius of the second arc groove (120), the first arc protrusion (210) slides in the first arc groove (110), and the second arc protrusion (220) slides in the second arc groove (120), The hinge mechanism has an unfolded state and a folded state. When the hinge mechanism switches from the unfolded state to the folded state, the hinge mechanism is in a first mating state and a second mating state in sequence. When the hinge mechanism is in the first mating state, the first arc groove (110) is slidably mated with the first arc protrusion (210); when the hinge mechanism is in the second mating state, the second arc groove (120) is slidably mated with the second arc protrusion (220).
2. The hinge mechanism according to claim 1, characterized in that: During the process of the hinge mechanism switching from the unfolded state to the folded state, the rotation direction of the swing arm (200) is a first rotation direction (A), and along the first rotation direction (A), the curvature radius of the first arc-shaped groove (110) increases gradually.
3. The hinge mechanism according to claim 1, characterized in that: In the direction of the rotation axis of the swing arm (200), the first arc-shaped protrusion (210) is connected to the second arc-shaped protrusion (220), and the first arc-shaped groove (110) is connected to the second arc-shaped groove (120).
4. The hinge mechanism according to claim 1, characterized in that: One of the groove wall surface of the first arc-shaped groove (110) and the surface of the first arc-shaped protrusion (210) is provided with a protrusion structure (211), When the hinge mechanism is in the first mating state, the other of the groove wall surface of the first arc-shaped groove (110) and the surface of the first arc-shaped protrusion (210) is in contact with the protrusion structure (211).
5. The hinge mechanism according to claim 4, characterized in that: In the rotation direction of the swing arm (200), at least two protruding structures (211) are arranged at intervals; And / or, the protrusion structures (211) are respectively provided on surfaces opposite to each other of the first arc-shaped protrusions (210).
6. The hinge mechanism according to claim 1, characterized in that: A groove wall surface of the first arc-shaped groove (110) is provided with a limiting guide portion, and the first arc-shaped protrusion (210) can slide along the limiting guide portion to switch the hinge mechanism from the first mating state to the second mating state.
7. The hinge mechanism according to claim 6, characterized in that: The number of the limiting guide parts is at least two, including a first limiting guide part (111) and a second limiting guide part (112) which are opposite to each other, a guiding channel (110a) being formed between the first limiting guide part (111) and the second limiting guide part (112), and the first arc-shaped protrusion (210) being able to slide along the guiding channel (110a).
8. The hinge mechanism according to claim 1, characterized in that: The groove wall surface of the second arc-shaped groove (120) is provided with a space-avoiding recess (121), and when the hinge mechanism is in the first mating state, the second arc-shaped protrusion (220) is opposite to the space-avoiding recess (121).
9. The hinge mechanism according to claim 8, characterized in that: The second arc-shaped groove (120) comprises a first groove wall surface (120a) and a second groove wall surface (120b) that are opposite to each other, and the first groove wall surface (120a) and the second groove wall surface (120b) are both provided with the air avoidance recess (121).
10. An electronic device, characterized in that: The device comprises a first device body (410), a second device body (420) and a hinge mechanism according to any one of claims 1 to 9, wherein the first device body (410) is connected to the second device body (420) through the hinge mechanism; During the relative rotation of the first device body (410) and the second device body (420), the electronic device switches between an unfolded state and a folded state.