Hinge mechanism and electronic device

Abstract

A hinge mechanism and an electronic device. The hinge mechanism comprises a base (900), a hinge support (100), a press-fit member (200) and swing arms (300), wherein the hinge support (100) is disposed on the base (900), and the hinge support (100) is provided with arc-shaped sliding grooves (120); the swing arms (300) are provided with arc-shaped sliding portions (301), and the arc-shaped sliding portions (301) are in sliding fit with the arc-shaped sliding grooves (120); and the press-fit member (200) is located on the side of the arc-shaped sliding portions (301) facing away from the hinge support (100), and the press-fit member (200) is connected to the hinge support (100). The electronic device comprises a first device body (810), a second device body (820) and a hinge mechanism, wherein the first device body (810) is connected to the second device body (820) by means of the hinge mechanism; and during the process of the first device body (810) and the second device body (820) rotating relative to each other, the electronic device switches between an unfolded state and a folded state.

Description

Hinge mechanism and electronic equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on November 23, 2023, with application number 202311577250.7 and invention name “Hinge Mechanism and Electronic Device”. The entire contents of the Chinese patent application are incorporated herein by reference. Technical Field

[0003] The present application belongs to the field of communication technology, and specifically relates to a hinge mechanism and electronic equipment. Background Art

[0004] 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 range of foldable electronic devices is becoming more and more extensive.

[0005] In related art, foldable electronic devices rely on a hinge mechanism to achieve folding and unfolding. The hinge mechanism typically includes a base, a hinge bracket, and a swing arm. The hinge bracket is mounted on the base, and the swing arm is rotatably connected to the hinge bracket, thereby enabling the folding and unfolding of the foldable electronic device. The foldable electronic device typically also includes a display screen, which is connected to the swing arm. When the swing arm rotates relative to the hinge bracket, it causes the display screen to deform, thereby achieving folding and unfolding of the display screen. However, in the folded state, the folding area of ​​the display screen applies a force to the hinge bracket, which is prone to deformation under the force. The deformed portion of the hinge bracket then acts on the swing arm, causing the swing arm to misalign with the hinge bracket, resulting in the swing arm being easily stuck during rotation, and reducing the folding stability of the foldable electronic device. Summary of the Invention

[0006] The purpose of the embodiments of the present application is to provide a hinge mechanism and an electronic device that can solve the problem of low folding stability of foldable electronic devices in the related art.

[0007] In the first aspect, an embodiment of the present application provides a hinge mechanism, comprising a base, a hinge bracket, a pressing piece and a swing arm, wherein the hinge bracket is arranged on the base, the hinge bracket is provided with an arc-shaped slide groove, the swing arm is provided with an arc-shaped sliding portion, the arc-shaped sliding portion slides in cooperation with the arc-shaped slide groove, the pressing piece is located on the side of the arc-shaped sliding portion facing away from the hinge bracket, and the pressing piece is connected to the hinge bracket.

[0008] In the second aspect, an embodiment of the present application also provides an electronic device, including 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.

[0009] In the embodiment of the present application, the arc-shaped sliding portion slides relative to the arc-shaped sliding groove to realize the rotation of the swing arm relative to the hinge bracket. When the swing arm rotates to the hinge bracket in a folded state, the display screen of the electronic device will be deformed and press against the hinge bracket, thereby applying a force to the hinge bracket. At the same time, the arc-shaped sliding portion of the swing arm presses against the pressing part, and the arc-shaped sliding portion will also apply a force to the pressing part. Since the pressing part is located on the side of the arc-shaped sliding portion facing away from the hinge bracket, the direction of the force borne by the hinge bracket and the direction of the force borne by the pressing part tend to be opposite, so that the force borne by the pressing part can at least partially offset the force borne by the hinge bracket, so that the overall structure formed by the hinge bracket and the pressing part is in a relatively balanced state. Then, the arc-shaped sliding portion is not easy to deform, and the swing arm is not easy to be dislocated. The swing arm rotates more smoothly, which is conducive to improving the folding stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] FIG1 is a schematic diagram of a partial structure of a hinge mechanism disclosed in an embodiment of the present application;

[0011] FIG2 is an exploded view of the hinge mechanism disclosed in an embodiment of the present application;

[0012] FIG3 is a schematic structural diagram of a base disclosed in an embodiment of the present application;

[0013] FIG4 is a top view of a partial structure of the hinge mechanism disclosed in an embodiment of the present application;

[0014] FIG5 is an enlarged view of point S in FIG4 ;

[0015] FIG6 is a top view of the swing arm disclosed in an embodiment of the present application;

[0016] FIG7 is a side view of the swing arm disclosed in an embodiment of the present application;

[0017] FIG8 is a cross-sectional view of the section AA in FIG6;

[0018] FIG9 is a schematic structural diagram of a gland disclosed in an embodiment of the present application;

[0019] FIG10 is a schematic structural diagram of the gland disclosed in an embodiment of the present application from another perspective;

[0020] FIG11 is a schematic diagram of a partial structure of the hinge mechanism in a folded state disclosed in an embodiment of the present application;

[0021] FIG12 is a cross-sectional view at BB in FIG11;

[0022] FIG13 is a schematic structural diagram of an electronic device disclosed in an embodiment of the present application.

[0023] Explanation of the accompanying drawings: 100-hinge bracket, 110-first surface, 120-arc-shaped slide groove, 130-welding groove, 140-slag containing groove, 200-pressing part, 210-main body, 211-avoidance groove, 212-connecting hole, 213-arc transition surface, 220-first extension part, 230-second extension part, 240-second protrusion, 250-welding protrusion, 300-swing arm, 301-arc-shaped sliding part, 301a-first protrusion, 310-first swing arm, 320-second swing arm, 400-frame connector, 500-connecting plate, 600-fastener, 700-display screen, A-first direction, 810-first device body, 820-second device body, 900-base. DETAILED DESCRIPTION

[0024] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0025] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0026] The hinge mechanism and electronic device provided in the embodiments of the present application are described in detail below with reference to specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0027] Please refer to Figures 1 to 13. The hinge mechanism disclosed in the embodiment of the present application includes a base 900, a hinge bracket 100, a pressing piece 200 and a swing arm 300, wherein the base 900 serves as an installation basis for the hinge bracket 100, the pressing piece 200 and the swing arm 300, the hinge bracket 100 is rotatably connected to the swing arm 300 to realize the rotation of the swing arm 300 relative to the hinge bracket 100, and the pressing piece 200 is used to press the swing arm 300 to prevent the swing arm 300 from being misaligned relative to the hinge bracket 100.

[0028] The hinge bracket 100 is arranged on the base 900, and the hinge bracket 100 is connected to the base 900; the hinge bracket 100 is provided with an arc-shaped slide groove 120, and the swing arm 300 is provided with an arc-shaped sliding part 301, and the arc-shaped sliding part 301 slides with the arc-shaped slide groove 120. Specifically, the arc-shaped sliding part 301 slides with the arc-shaped slide groove 120 in the rotation direction of the swing arm 300 to realize the rotational connection between the hinge bracket 100 and the swing arm 300.

[0029] The pressing member 200 is located on the side of the arcuate sliding portion 301 facing away from the hinge bracket 100 and is connected to the hinge bracket 100. Optionally, the pressing member 200 and the hinge bracket 100 can be fixedly connected by a non-detachable method such as welding, or by a detachable method such as bolting. During the rotation of the swing arm 300 relative to the base 900, the pressing member 200 and the arcuate sliding portion 301 abut against each other.

[0030] In the embodiment of the present application, when the swing arm 300 rotates to the hinge bracket 100 in a folded state, the display screen 700 of the electronic device will deform and press against the hinge bracket 100, thereby applying a force to the hinge bracket 100. At the same time, the arc-shaped sliding portion 301 of the swing arm 300 presses against the pressing piece 200, and the arc-shaped sliding portion 301 will also apply a force to the pressing piece 200. Since the pressing piece 200 is located on the side of the arc-shaped sliding portion 301 facing away from the hinge bracket 100, the direction of the force borne by the hinge bracket 100 is opposite to the direction of the force borne by the pressing piece 200, so that the force borne by the pressing piece 200 can at least partially offset the force borne by the hinge bracket 100, thereby making the overall structure formed by the hinge bracket 100 and the pressing piece 200 in a relatively balanced state. Then, the arc-shaped sliding portion 301 is not easy to deform, and the swing arm 300 is not easy to dislocate, and the swing arm 300 rotates more smoothly, which is conducive to improving the folding stability.

[0031] In an optional embodiment, as shown in FIG8 , a first protrusion 301a is provided on the side of the arcuate sliding portion 301 facing the pressing member 200. When the hinge mechanism is in the folded state, the first protrusion 301a directly abuts against the pressing member 200. The present embodiment does not impose any specific restrictions on the structure of the first protrusion 301a; it can simply protrude from the surface of the arcuate sliding portion 301. In this manner, the arcuate sliding portion 301 utilizes the first protrusion 301a to more easily abut against the pressing member 200.

[0032] In another embodiment, as shown in FIG10 , a second protrusion 240 is provided on the side of the pressing member 200 facing the arcuate sliding portion 301. When the hinge mechanism is in the folded state, the first protrusion 301a abuts against the second protrusion 240. That is, the arcuate sliding portion 301 abuts against the pressing member 200 via the first protrusion 301a and the second protrusion 240. The present embodiment does not impose any specific restrictions on the structure of the second protrusion 240; it only needs to protrude from the surface of the pressing member 200.

[0033] In this embodiment, the pressing piece 200 is further provided with a second protrusion 240, and the first protrusion 301a is more easily abutted against the pressing piece 200 through the second protrusion 240, which is beneficial to increase the abutting force between the pressing piece 200 and the arc-shaped sliding part 301 during the folding process, and is more conducive to the overall structure formed by the hinge bracket 100 and the pressing piece 200 being in a relatively balanced state, which is beneficial to further improve the folding stability.

[0034] In an optional embodiment, at least one of the first protrusion 301a and the second protrusion 240 is a block-shaped protrusion.

[0035] In another embodiment, at least one of the first protrusion 301a and the second protrusion 240 extends in the direction of the rotation axis of the swing arm 300, that is, at least one of the first protrusion 301a and the second protrusion 240 is a strip-shaped protrusion. Alternatively, only the first protrusion 301a or the second protrusion 240 may extend in the direction of the rotation axis of the swing arm 300, or both the first protrusion 301a and the second protrusion 240 may extend in the direction of the rotation axis of the swing arm 300. During the folding process of the hinge mechanism, the swing arm 300 is prone to slipping in the direction of its own rotation axis. Therefore, at least one of the first protrusion 301a and the second protrusion 240 is a strip-shaped protrusion. The first protrusion 301a can abut against the second protrusion 240 at different positions, so that the first protrusion 301a and the second protrusion 240 can continuously abut against each other, thereby ensuring that the arc-shaped sliding portion 301 and the pressing member 200 continuously abut against each other.

[0036] In an optional embodiment, the number of the first protrusion 301a and the number of the second protrusion 240 are both one.

[0037] In another embodiment, in the direction of the rotation axis of the swing arm 300, the swing arm 300 is provided with at least two first protrusions 301a at intervals, and the pressing member 200 is provided with at least two second protrusions 240 at intervals, with the first protrusions 301a corresponding one to the second protrusions 240. In this arrangement, by providing at least two sets of corresponding first protrusions 301a and second protrusions 240, different positions of the arcuate sliding portion 301 are respectively abutted against different positions of the pressing member 200, which helps to increase the abutting force between the arcuate sliding portion 301 and the pressing member 200 and also helps to improve the abutting stability between the arcuate sliding portion 301 and the pressing member 200.

[0038] In an optional embodiment, different positions of the pressing member 200 are detachably connected to the hinge bracket 100 via fasteners 600 .

[0039] In another embodiment, the pressing member 200 includes a main body 210 and an extension portion connected to each other. The main body 210 is detachably connected to the hinge bracket 100 via a fastener 600. When the hinge mechanism is in the folded state, the extension portion abuts against the arc-shaped sliding portion 301. The fastener 600 can be a threaded fastener such as a screw or bolt. Optionally, as shown in FIG9 , the main body 210 is provided with a connecting hole 212; the hinge bracket 100 is provided with a threaded hole, and the fastener 600 passes through the connecting hole 212 and is threadedly engaged with the threaded hole. Optionally, the main body 210 and the extension portion can be a one-piece structure, or they can be a separate structure.

[0040] By adopting this embodiment, only the main body 210 of the pressing part 200 is connected to the hinge bracket 100 through the fastener 600, so as to maintain the overall stability of the pressing part 200, avoid setting fasteners 600 at different positions of the pressing part 200, and using multiple fasteners 600 to connect with the hinge bracket 100, resulting in a large space occupation, which is beneficial to reducing the space occupied by the hinge mechanism, and further conducive to the miniaturization of electronic equipment.

[0041] In an optional embodiment, the number of the swing arm 300 and the number of the extension portion are both one, and the arc-shaped sliding portion 301 of the swing arm 300 is offset against the extension portion.

[0042] In another embodiment, as shown in reference figure 12, the number of the swing arms 300 is at least two, including a first swing arm 310 and a second swing arm 320, the first swing arm 310 and the second swing arm 320 are respectively arranged on both sides of the base 900, and the first swing arm 310 and the second swing arm 320 are respectively rotatably connected to the hinge bracket 100, that is, the hinge bracket 100 is provided with at least two arc-shaped sliding grooves 120, and the arc-shaped sliding portion 301 of the first swing arm 310 and the arc-shaped sliding portion 301 of the second swing arm 320 are respectively slidably matched with two of the arc-shaped sliding grooves 120.

[0043] There are at least two extensions, including a first extension 220 and a second extension 230. The first extension 220 and the second extension 230 are respectively disposed on either side of the main body 210. The first extension 220 opposes the first swing arm 310, and the second extension 230 opposes the second swing arm 320. Specifically, the first extension 220 opposes the arcuate sliding portion 301 of the first swing arm 310, and the second extension 230 opposes the arcuate sliding portion 301 of the second swing arm 320. When the hinge mechanism is in the folded state, the arcuate sliding portion 301 of the first swing arm 310 abuts against the first extension 220, and the arcuate sliding portion 301 of the second swing arm 320 abuts against the second extension 230.

[0044] Specifically, as shown in Figure 12, during the folding process of the hinge mechanism, the display screen 700 exerts a force F1 on the hinge bracket 100, while the first swing arm 310 and the second swing arm 320 exert forces F2 and F3 on the pressing member 200, respectively. F1, F2, and F3 are parallel to a first direction A. The hinge bracket 100 has a first surface 110 for contact with the display screen 700, and the first direction A is perpendicular to the plane of the first surface 110. F2 and F3 are opposite to the direction of F1. Furthermore, F2 + F3 = F1, so that the structure formed by the pressing member 200 and the hinge bracket 100 is in a state of force equilibrium.

[0045] By adopting this embodiment, the first swing arm 310 and the second swing arm 320 are rotated relative to the hinge bracket 100 at the same time, which is conducive to improving the folding efficiency of the hinge mechanism. Based on this situation, the pressing piece 200 is provided with extension parts corresponding to different swing arms 300, which is conducive to making different positions of the pressing piece 200 respectively offset against the first swing arm 310 and the second swing arm 320, and making the arc-shaped sliding parts 301 of the first swing arm 310 and the second swing arm 320 not easily deformed, ensuring that the first swing arm 310 and the second swing arm 320 are not easily misplaced, and the first swing arm 310 and the second swing arm 320 are smoother during the rotation process, which is conducive to further improving the folding stability of the hinge mechanism.

[0046] Optionally, in the direction of the rotation axis of the first swing arm 310, at least two first protrusions 301a are arranged at intervals on the arc-shaped sliding portion 301 of the first swing arm 310, and at least two second protrusions 240 are arranged at intervals on the first extension portion 220, and the first protrusions 301a correspond one-to-one with the second protrusions 240; similarly, in the direction of the rotation axis of the second swing arm 320, at least two second protrusions 240 are arranged at intervals on the arc-shaped sliding portion 301 of the second swing arm 320, and at least two second protrusions 240 are arranged at intervals on the second extension portion 230, and the first protrusions 301a correspond one-to-one with the second protrusions 240.

[0047] In an optional embodiment, the hinge bracket 100 is provided with a first surface 110 for contact with the display screen 700. During the folding process of the hinge mechanism, the display screen 700 deforms and acts on the first surface 110, applying a force to the hinge bracket 100 through the first surface 110. As shown in FIG9 , the surface of the main body 210 facing away from the hinge bracket 100 is provided with an escape groove 211, which is recessed relative to the first surface 110. The present embodiment does not impose any specific limitations on the structure of the escape groove 211.

[0048] By providing the avoidance groove 211 , when the display screen 700 is deformed during the folding process of the hinge mechanism, the portion where the avoidance groove 211 is provided will not apply force to the display screen 700 , thereby preventing the display screen 700 from being damaged due to excessive stress.

[0049] Of course, in other embodiments, the surface of the main body 210 facing away from the hinge bracket 100 may not be provided with the avoidance groove 211 , that is, this portion of the structure is not recessed relative to the first surface 110 .

[0050] In an optional embodiment, as shown in FIG9 , a circular arc transition surface 213 is provided between the extension portion and the avoidance groove 211, and the surface of the extension portion and the avoidance groove 211 are smoothly connected via the circular arc transition surface 213. In this embodiment, the circular arc transition surface 213 is utilized to achieve a smooth connection between the extension portion and the avoidance groove 211, so that the extension portion, the avoidance groove 211, and the portion therebetween form a smooth curved surface, thereby preventing the presence of a protruding structure at the connection between the extension portion and the avoidance groove 211, which could damage the display screen 700 during folding.

[0051] Of course, in other embodiments, the main body 210 may be directly provided with the avoidance groove 211 , and the arc transition surface 213 may not be provided between the avoidance groove 211 and the extension portion.

[0052] In an alternative embodiment, the hinge bracket 100 is provided with a first welding structure, and the extension portion is provided with a second welding structure. One of the first welding structure and the second welding structure is a welding groove 130, and the other is a welding protrusion 250. The welding protrusion 250 extends into the welding groove 130 so that the welding protrusion 250 is welded to the groove wall surface of the welding groove 130. Alternatively, as shown in Figures 3-5, the hinge bracket 100 can be provided with a welding groove 130, which is connected to the mounting groove for accommodating the press-fit component 200. As shown in Figures 9-10, the extension portion is provided with the welding protrusion 250; alternatively, the hinge bracket 100 can be provided with a welding protrusion 250 and the extension portion is provided with a welding groove 130.

[0053] In this embodiment, the welding groove 130 and the welding protrusion 250 are welded together, which is beneficial for further positioning the extension part, fixing the position of the extension part relative to the pressing piece 200, and improving the connection stability between the pressing piece 200 and the hinge bracket 100.

[0054] Optionally, welding protrusions 250 are provided at both ends of the first extension portion 220 and the second extension portion 230. There are multiple welding grooves 130, and each welding protrusion 250 corresponds to each welding groove 130. In this way, by utilizing multiple sets of matching welding protrusions 250 and welding grooves 130, the ends of each extension portion of the press-fit component 200 can be welded and fixed, thereby further facilitating the positioning of the press-fit component 200.

[0055] Of course, in other embodiments, the extension portion and the hinge bracket 100 may not be provided with the welding protrusion 250 and the welding groove 130 , that is, the extension portion is only connected to the hinge bracket 100 through the main body 210 , and the extension portion is only used to abut against the arc-shaped sliding portion 301 .

[0056] In an optional embodiment, as shown in Figures 3 and 5, the hinge bracket 100 or the extension portion is further provided with a slag receiving groove 140, which is in communication with the welding groove 130. The welding groove 130 is formed on the bottom wall surface of the slag receiving groove 140. The embodiment of the present application does not limit the specific structure of the slag receiving groove 140, and the total area of ​​the bottom wall surface thereof can be larger than the notch area of ​​the welding groove 130.

[0057] With this embodiment, the slag trough 140 can accommodate the welding slag generated during the welding process between the welding groove 130 and the welding protrusion 250, preventing the welding slag from directly protruding onto the surface of the hinge bracket 100 or the extension portion and damaging the display screen 700, thereby improving the safety performance of the display screen 700.

[0058] Of course, in other embodiments, the hinge bracket 100 or the extension portion may not be provided with the slag groove 140 , that is, the welding slag falls directly onto the surface of the hinge bracket 100 or the extension portion.

[0059] In an optional embodiment, as shown in Figures 1 and 2, the hinge mechanism further includes a frame connector 400 and a connecting plate 500. The frame connector 400 is rotatably connected to the swing arm 300, and the frame connector 400 drives the swing arm 300 to rotate relative to the base 900. The connecting plate 500 is opposite the frame connector 400 and the swing arm 300, and is used to shield the frame connector 400 and the swing arm 300, improving the appearance. The surface of the connecting plate 500 is coplanar with the surface of the base 900. Optionally, the frame connector 400 and the connecting plate 500 are provided on both sides of the base 900.

[0060] Based on the hinge mechanism disclosed in the present application, please refer to FIG13 , an embodiment of the present application further provides an electronic device, the electronic device comprising a first device body 810, a second device body 820 and the hinge mechanism in the above embodiment, the first device body 810 being connected to the second device body 820 via the hinge mechanism. During the relative rotation of the first device body 810 and the second device body 820, the electronic device switches between an unfolded state and a folded state. With such an arrangement, during the folding process of the electronic device, the overall structure formed by the hinge bracket 100 and the pressing part 200 is in a relatively balanced state, the arc-shaped sliding portion 301 is not easily deformed, the swing arm 300 is not easily misplaced, and the swing arm 300 rotates more smoothly, which is conducive to improving the folding stability.

[0061] 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 this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A hinge mechanism, comprising a base, a hinge bracket, a pressing piece and a swing arm, wherein the hinge bracket is arranged on the base, the hinge bracket is provided with an arc-shaped slide groove, the swing arm is provided with an arc-shaped sliding part, the arc-shaped sliding part is slidably matched with the arc-shaped slide groove, The pressing piece is located on a side of the arc-shaped sliding portion facing away from the hinge bracket, and the pressing piece is connected to the hinge bracket.

2. The hinge mechanism according to claim 1, wherein: A first protrusion is provided on a side of the arc-shaped sliding portion facing the pressing piece, and a second protrusion is provided on a side of the pressing piece facing the arc-shaped sliding portion; When the hinge mechanism is in a folded state, the first protrusion abuts against the second protrusion.

3. The hinge mechanism according to claim 2, wherein: At least one of the first protrusion and the second protrusion extends along a direction in which a rotation axis of the swing arm is located.

4. The hinge mechanism according to claim 2, wherein: In the direction of the rotation axis of the swing arm, at least two first protrusions are arranged at intervals on the swing arm, and at least two second protrusions are arranged at intervals on the pressing piece, and the first protrusions correspond to the second protrusions one by one.

5. The hinge mechanism according to claim 1, wherein: The pressing piece comprises a main body portion and an extending portion which are connected to each other. The main body portion is detachably connected to the hinge bracket via a fastener. When the hinge mechanism is in a folded state, the extending portion abuts against the arc-shaped sliding portion.

6. The hinge mechanism according to claim 5, wherein: The number of the swing arms is at least two, including a first swing arm and a second swing arm, and the first swing arm and the second swing arm are respectively arranged on both sides of the base. The number of the extension parts is at least two, including a first extension part and a second extension part, the first extension part and the second extension part are respectively arranged on both sides of the main body, the first extension part is opposite to the first swing arm, and the second extension part is opposite to the second swing arm; When the hinge mechanism is in the folded state, the arc-shaped sliding portion of the first swing arm abuts against the first extending portion, and the arc-shaped sliding portion of the second swing arm abuts against the second extending portion.

7. The hinge mechanism according to claim 5, wherein: The hinge bracket is provided with a first surface for contact with the display screen, and the surface of the main body facing away from the hinge bracket is provided with an avoidance groove, and the avoidance groove is recessed relative to the first surface.

8. The hinge mechanism according to claim 7, wherein: An arc transition surface is provided between the extension portion and the avoidance groove, and the surface of the extension portion and the avoidance groove are smoothly connected through the arc transition surface.

9. The hinge mechanism according to claim 5, wherein: The hinge bracket is provided with a first welding structure, and the extension portion is provided with a second welding structure. One of the first welding structure and the second welding structure is a welding groove, and the other is a welding protrusion. The welding protrusion extends into the welding groove so that the welding protrusion is welded to the groove wall of the welding groove.

10. The hinge mechanism according to claim 9, wherein: The hinge bracket or the extension portion is further provided with a slag containing groove, the slag containing groove is communicated with the welding groove, and the welding groove is opened on the bottom wall surface of the slag containing groove.

11. An electronic device, comprising a first device body, a second device body and the hinge mechanism according to any one of claims 1 to 10, 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.

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