Hinge mechanism and electronic device

Abstract

This application discloses a hinge mechanism and an electronic device, belonging to the field of electronic devices. In the hinge mechanism, a base is rotatably connected to a first swing arm, and the first swing arm and a first support can slide relative to each other along the thickness direction of the first support. A third swing arm includes a first arm body and a second arm body, which are spaced apart along the rotation axis of the first swing arm and rotatably connected to the base. Both arms are slidably engaged with the first support in a direction perpendicular to the rotation axis. A first synchronous engagement member and a second synchronous engagement member are linked and movably mounted on the base. The first arm body and the second arm body are both driven by the first synchronous engagement member. A fourth swing arm is driven by the second synchronous engagement member, so that the third and fourth swing arms can rotate in opposite directions relative to the base. A cam member is slidably mounted on the base along the rotation axis, and the two are relatively fixed in the direction around the rotation axis. The second arm body is engaged with the cam member. The opposite ends of the elastic member abut against the cam member and the base, respectively.

Description

Technical Field

[0001] This application belongs to the field of electronic equipment technology, specifically relating to a hinge mechanism and an electronic device. Background Technology

[0002] Foldable phones are becoming increasingly popular due to their large display area and high portability. The hinge mechanism is the component in a foldable phone that provides the ability to fold and unfold. It typically has supports on opposite sides of the base, and each support is connected to the base via at least one hinge arm, allowing the supports on opposite sides of the base to rotate relative to each other, thus enabling the hinge mechanism to fold. In current technology, the opposing ends of the hinge arms are usually rotatably connected to the supports and the base, respectively. The hinge arm and the support generally use a shaft-hole structure to form a rotatable connection. However, to keep the thickness of the electronic device relatively small when folded, the rotatable connection between the hinge arm and the base generally uses an arc-shaped bearing and an arc-shaped groove, rather than the traditional shaft-hole rotation structure.

[0003] In hinge mechanisms employing the aforementioned structure, to reduce creases when the display screen is folded in electronic devices, the hinge arm's rotation angle is typically greater than the bracket's rotation angle, resulting in a teardrop-shaped cross-section of the folded portion of the display screen. For example, if the maximum angle between the bracket and the base is 90°, the structural parameters of the hinge arm's bearing can be designed so that, during the bracket's rotation relative to the base, the hinge arm can rotate in the same direction relative to the bracket around its connection point. That is, when the bracket rotates 90° relative to the base, the hinge arm can rotate at an angle exceeding 90° relative to the base. However, because the hinge arm's rotation angle is relatively large, a relatively large portion of the bearing slides out of the groove. This results in a relatively small overlap between the bearing and the groove in the folded hinge mechanism, significantly impacting the reliability of the connection between the hinge arm and the base, leading to relatively low reliability of the hinge mechanism. Summary of the Invention

[0004] The purpose of this application is to provide a hinge mechanism and an electronic device to solve the problem of relatively low reliability of current hinge mechanisms.

[0005] In a first aspect, embodiments of this application provide a hinge mechanism, which includes a base, a first swing arm, a first bracket, a third swing arm, a fourth swing arm, a first synchronous engagement component, a second synchronous engagement component, an elastic component, and a cam component, wherein...

[0006] The base is provided with an arc-shaped first sliding groove, and the first end of the first swing arm is provided with an arc-shaped first slider. The first slider is rotatably connected to the first sliding groove. The second end of the first swing arm and one of the first bracket are provided with a second slider and the other is provided with a second sliding groove. During the rotation of the first bracket relative to the base, the second slider and the second sliding groove slide relative to each other along the thickness direction of the first bracket.

[0007] The third swing arm and the first swing arm are both disposed on the same side of the base. The third swing arm includes a first arm body and a second arm body. The first arm body and the second arm body are spaced apart along the rotation axis of the first swing arm. The first arm body and the second arm body are both rotatably connected to the base, and the first arm body and the second arm body are both slidably engaged with the first bracket in a direction perpendicular to the rotation axis.

[0008] The first and second synchronous coupling components are linked and both are movably mounted on the base. The first and second arm bodies are both driven by the first synchronous coupling component. The fourth swing arm is driven by the second synchronous coupling component, so that the third and fourth swing arms can rotate in opposite directions relative to the base.

[0009] The cam is slidably mounted on the base along the rotation axis, and the cam and the base are fixed relative to each other in the direction around the rotation axis. The cam is provided on the end face of the second arm away from the first arm, and the second arm and the cam are engaged. In the rotation axis, one end of the elastic member abuts against the side of the cam away from its cam surface, and the other end of the elastic member is fixed relative to the base.

[0010] Secondly, embodiments of this application disclose an electronic device that includes the aforementioned hinge mechanism.

[0011] This application discloses a hinge mechanism, in which a third swing arm and a fourth swing arm are respectively provided on opposite sides of a base, both of which are rotatably engaged with the base, thereby allowing the hinge mechanism to switch between an unfolded state and a folded state. Furthermore, a first swing arm is provided on the side of the base where the third swing arm is located. The first swing arm slides with an arc-shaped first slider on the base, thereby enabling the first swing arm to form a rotatable engagement with the base. Meanwhile, one of the first support and the first swing arm is provided with a second slide groove, and the other is provided with a second slider. The second slider can slide in the second slide groove in a straight line, and the second slide groove has a component extending along the thickness direction of the first support, so that the end of the first swing arm connected to the first support has the ability to move relative to the first support. Thus, by designing parameters such as the first slider of the first swing arm, during the rotation of the first support relative to the base in the first direction, the second slider can slide in the second slide groove. So that while the first swing arm rotates relative to the base in the first direction, the first swing arm as a whole can also rotate relative to the first support in a second direction opposite to the first direction. Thus, while the rotation angle and other parameters between the first support and the base remain unchanged, the rotation angle between the first swing arm and the base is relatively reduced, thereby reducing the size of the part of the first slider that slides out of the first slide groove. That is, when the hinge mechanism disclosed in this application embodiment is in the folded state, the overlap between the first slider and the first slide groove is still relatively large, which can improve the cooperation stability between the first slider and the first slide groove, thereby improving the reliability of the hinge mechanism.

[0012] In addition, to improve the torsional resistance of the hinge mechanism, in this embodiment, the third swing arm includes a first arm and a second arm spaced apart along the aforementioned rotation axis, ensuring that the relatively small overall size of the third swing arm can have a large span along the aforementioned rotation axis. Accordingly, both the first arm and the second arm are rotatably engaged with the base, and both are also slidably engaged with the first bracket in a direction perpendicular to the rotation axis, so as to ensure that the movements of the first arm and the second arm are consistent.

[0013] Meanwhile, through the linkage of the first and second synchronous coupling components, the third and fourth swing arms can form a transmission coupling relationship, so that the third and fourth swing arms can synchronously rotate in opposite directions relative to the base, enabling the hinge mechanism to have the ability to rotate synchronously.

[0014] Furthermore, by equipping the third swing arm with an elastic element and a cam element, the third swing arm gains the ability to hover relative to the base, expanding the application scenarios of electronic devices using this hinge mechanism. Specifically, the elastic element abuts against the side of the second arm of the third swing arm opposite to the first arm via the cam element. By giving the elastic element a preset elastic force, it can constantly compress the second arm through the cam element. This ensures that the second arm and the base essentially do not experience relative movement along the aforementioned rotational axis, thereby improving the operational stability of the second arm and ultimately enhancing the structural precision and reliability of the entire hinge mechanism. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the hinge mechanism disclosed in the embodiments of this application in the unfolded state;

[0016] Figure 2 This is a schematic diagram of the hinge mechanism disclosed in the embodiments of this application in the unfolded state and in another direction;

[0017] Figure 3 This is a schematic diagram of the hinge mechanism disclosed in the embodiments of this application in a folded state;

[0018] Figures 4-6 All are exploded schematic diagrams of the hinge mechanisms disclosed in the embodiments of this application;

[0019] Figure 7 This is a schematic diagram of a portion of the hinge mechanism disclosed in the embodiments of this application, including the first synchronous engagement member;

[0020] Figure 8 This is a schematic diagram of the structure of the first swing arm in the hinge mechanism disclosed in the embodiments of this application;

[0021] Figure 9 This is a cross-sectional schematic diagram of the hinge mechanism disclosed in the embodiments of this application in a folded state;

[0022] Figure 10 This is a cross-sectional schematic diagram of the hinge mechanism disclosed in the embodiments of this application in the unfolded state;

[0023] Figure 11 This is a schematic diagram illustrating the principle of the relative motion between the first support and the first swing arm in the hinge mechanism disclosed in the embodiments of this application;

[0024] Figure 12 This is a schematic diagram of the hinge mechanism disclosed in the embodiments of this application in a folded state;

[0025] Figure 13 This is a schematic diagram of the hinge mechanism disclosed in the embodiments of this application in the unfolded state;

[0026] Figure 14This is another cross-sectional schematic diagram of the hinge mechanism disclosed in the embodiments of this application in the unfolded state.

[0027] The marking description is:

[0028] 100-Base, 110-Seat body, 111-First slide groove, 120-Gland, 130-Threaded connector

[0029] 201 - First slider, 202 - Second slider, 210 - First swing arm, 220 - Second swing arm

[0030] 301 - First slide rail, 310 - First support, 320 - Second support

[0031] 401-Third swing arm, 401a-Notch, 402-Fourth swing arm, 410-First arm body, 411-First rotating part, 411a-Third inclined surface, 412-First connecting part, 420-Second arm body, 421-Second rotating part, 421a-Fourth inclined surface, 422-Second connecting part, 423-Slide rod,

[0032] 501 - First synchronous mating component, 502 - Second synchronous mating component, 510 - First inclined surface, 511 - First spiral driving surface, 512 - Second spiral driving surface, 513 - First cut-off end face, 520 - Second inclined surface.

[0033] 610-Elastic component, 620-Cam component, 630-Synchronous shaft, 650-Fixed bracket, 651-Shaft sleeve, 660-Snap ring,

[0034] 701 - Track groove, 710 - First door panel, 720 - Second door panel, 730 - Middle panel

[0035] 900-Flexible screen. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0037] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0038] like Figures 1-14 As shown in the illustration, this application discloses a hinge mechanism that can be applied to electronic devices to enable the devices to fold and unfold, thereby achieving both a larger display area and greater portability. The hinge mechanism includes a base 100, a first swing arm 210, a first support 310, a third swing arm 401, a fourth swing arm 402, a first synchronous engagement member 501, a second synchronous engagement member 502, an elastic member 610, and a cam member 620. Of course, to ensure the structural integrity of the hinge mechanism, it typically also includes a second swing arm 220 and a second support 320. The second swing arm 220 and the first swing arm 210 are respectively disposed on opposite sides of the base 100, and the first swing arm 210 is used to rotatably connect the base 100 and the first support 310. Correspondingly, the second swing arm 220 is used to rotatably connect the base 100 and the second support 320.

[0039] like Figure 1 As shown, the first bracket 310 and the second bracket 320 are respectively disposed on opposite sides of the base 100, so that the hinge mechanism can be connected to the first housing and the second housing (not shown in the figure) of the electronic device through the first bracket 310 and the second bracket 320, respectively. When the first housing and / or the second housing of the electronic device is subjected to force, the force can be transmitted to the first bracket 310 and the second bracket 320, thereby allowing the first bracket 310 and the second bracket 320 to rotate relative to the base 100 through the first swing arm 210 and the second swing arm 220, respectively. This causes the entire hinge mechanism to fold and unfold, enabling the electronic device using this hinge mechanism to switch between folded and unfolded states. Specifically, the first bracket 310 can be fixedly mounted on the first housing of the electronic device and the second bracket 320 can be fixedly mounted on the second housing of the electronic device using screws or other connecting parts.

[0040] Of course, the hinge mechanism may also include other components, such as the first door panel 710 and the second door panel 720, such as... Figure 2As shown, the first door panel 710 and the second door panel 720 are respectively disposed on opposite sides of the base 100, and the ends of the first door panel 710 and the second door panel 720 away from the base 100 are respectively rotatably connected to the first bracket 310 and the second bracket 320, so that when the hinge mechanism is in the folded state, as Figure 9 As shown, the first door panel 710 and the second door panel 720 can form a flared structure, with the flared opening facing the direction of the base 100, so as to provide a larger accommodating space for the bent part in the middle of the flexible screen 900, prevent the flexible screen 900 from being squeezed and damaged, and improve the service life of the flexible screen 900.

[0041] Correspondingly, when the hinge mechanism is in the extended state, other components within the hinge can provide support for the first door panel 710 and the second door panel 720, ensuring that the supporting surfaces of the first door panel 710 and the second door panel 720 are coplanar, and providing support for the flexible screen 900, thereby improving the display effect and lifespan of the flexible screen 900. Specifically, when the hinge mechanism is in the extended state, the components used to support the first door panel 710 and the second door panel 720 can be the aforementioned third swing arm 401 and fourth swing arm 402, etc.

[0042] Similar to the first swing arm 210 and the second swing arm 220, the third swing arm 401 and the fourth swing arm 402 are also rotatably connected to opposite sides of the base 100. When the hinge mechanism is applied in electronic devices, the third swing arm 401 and the fourth swing arm 402 are also directly or indirectly connected to the first housing and the second housing, respectively. The third swing arm 401 and the fourth swing arm 402 can form a synchronous relative rotation relationship through a structure such as gears, thereby enabling the first housing and the second housing to have the ability to rotate synchronously relative to the base 100.

[0043] Optionally, using a pin or similar structure, both the third swing arm 401 and the fourth swing arm 402 can be rotatably mounted on the base 100. Alternatively, the synchronous shaft 630 mentioned below can be reused, allowing the synchronous shaft 630 to provide mounting for devices such as the elastic element 610, while also enabling each of the third swing arm 401 and the fourth swing arm 402 to be rotatably connected to the base 100 via a synchronous shaft 630. Furthermore, as... Figure 14As shown, both the third swing arm 401 and the fourth swing arm 402 can include a slide rod 423, and both the first door panel 710 and the second door panel 720 can be provided with corresponding track grooves 701. The slide rod 423 is slidably installed in the track groove 701. By designing the specific extension trajectory of the track groove 701 and the rotation trajectory of the third swing arm 401 and the fourth swing arm 402 relative to the base 100, it can be ensured that during the rotation of the third swing arm 401 and the fourth swing arm 402 relative to the base 100, the first door panel 710 and the second door panel 720 can be driven to rotate relative to the base 100, so that the first door panel 710 and the second door panel 720 can switch between a parallel state (corresponding to the hinge mechanism in the unfolded state) and a "flared state" (corresponding to the hinge mechanism in the folded state).

[0044] In order for the first support 310 to be rotatably engaged with the base 100 via the first swing arm 210, and for the second support 320 to be rotatably engaged with the base 100 via the second swing arm 220, the first swing arm 210 and the second swing arm 220 need to be respectively positioned on opposite sides of the base 100 during their arrangement. Of course, a portion of each of the first swing arm 210 and the second swing arm 220 needs to be connected to the base 100, while a portion of each of the first swing arm 210 and the second swing arm 220 is located outside the base 100.

[0045] In detail, in order to make the thickness of the screen accommodating space formed by the hinge mechanism in the folded state relatively small, or in other words, to make the distance between the first support 310 and the second support 320 in the hinge mechanism in the folded state relatively smaller, in the process of designing the structure of the base 100, the base 100 can be provided with multiple arc-shaped first sliding grooves 111, and both the first swing arm 210 and the second swing arm 220 can include arc-shaped first sliders 201.

[0046] Specifically, the first end of each of the first swing arms 210 and 220 can be provided with an arc-shaped first slider 201, so that the first swing arms 210 and 220 can respectively cooperate with different first slide grooves 111 on the base 100 through their respective first sliders 201. Furthermore, by making the rotation axis of the first swing arms 210 and 220 relative to the base 100 located outside the base 100, the distance between the first support 310 and the second support 320 in the hinge mechanism in the folded state can be relatively small, thereby reducing the thickness of the electronic device using this hinge mechanism in the folded state.

[0047] To reduce the processing difficulty of the components in the hinge mechanism, the dimensions of the first sliders 201 of the first swing arm 210 and the second swing arm 220 can be made the same. Furthermore, during the arrangement of the first sliding grooves 111 on the base 100, the first sliding grooves 111 corresponding to the first swing arm 210 and the second swing arm 220 can be aligned flush with the rotation axis of the first swing arm 210. This improves the consistency of the movements of the first swing arm 210 and the second swing arm 220. Alternatively, in another embodiment of this application, the first sliding grooves 111 corresponding to the first swing arm 210 and the second swing arm 220 can be offset in the aforementioned axial direction. Using this technical solution can reduce the width of the base 100 to a certain extent, thereby making the overall width of the hinge mechanism relatively smaller. The direction of the rotation axis of the first swing arm 210 is the rotation axis of the first swing arm 210. This direction is parallel to the length direction of the base 100 and perpendicular to the thickness direction of the base 100. The width direction of the base 100 is perpendicular to both the thickness direction of the base 100 and the rotation axis of the first swing arm 210.

[0048] To enable the first swing arm 210 to connect with the first support 310 and to allow the first support 310 to rotate relative to the base 100, in this embodiment, one of the first support 310 and the first swing arm 210 may be provided with a second slider 202, and the other with a second slide groove 301. The second slider 202 is movably installed in the second slide groove 301 along a certain straight line, thereby allowing the end of the first swing arm 210 connected to the first support 310 to move relative to the first support 310, thus changing the overall positional relationship between the first support 310 and the first swing arm 210. Of course, the sliding direction between the second slider 202 and the second slide groove 301 is perpendicular to the rotation axis of the first swing arm 210.

[0049] More specifically, the second sliding groove 301 provided on the first swing arm 210 or the first bracket 310 has a component along the thickness direction of the first bracket 310, which enables the end of the first swing arm 210 connected to the first bracket 310 to move relative to the first bracket 310 along the thickness direction of the first bracket 310. It should be noted that when the hinge mechanism is in the unfolded state, the thickness direction of the first bracket 310 is parallel to the thickness direction of the base 100, or in other words, the thickness direction of the first bracket 310 is the thickness direction of the display screen in the unfolded state. Correspondingly, when the hinge mechanism is in the folded state, the rotation angle of the first bracket 310 relative to the base 100 is generally 90°, and in this state, the first bracket 310 and the second bracket 320 are parallel to each other.

[0050] Meanwhile, when using the first swing arm 210 and the first bracket 310 with the above-described structure, based on the specific parameters of the first swing arm 210 and the first slide groove 111 on the base 100, such as Figure 11 As shown, by designing the parameters of the second slider 202 and the second slide groove 301, it can be ensured that during the process of the first support 310 rotating relative to the base 100 along the first direction and driving the first swing arm 210 to rotate relative to the base 100, the second slider 202 can slide relative to the second slide groove 301, thereby allowing the end of the first swing arm 210 connected to the first support 310 to move relative to the first support 310 along the second slide groove 301. In this case, the first swing arm 210 as a whole can rotate relative to the first support 310 along the second direction. The second direction is opposite to the first direction; for example, if the first direction is a clockwise rotation direction, then the second direction is a counterclockwise rotation direction.

[0051] In detail, such as Figure 9 and Figure 10 As shown, when the hinge mechanism is in the unfolded state, the second slider 202 can be positioned in the second slide groove 301 at the end closest to the display screen. During the process of the hinge mechanism switching from the unfolded state to the folded state, the second slider 202 gradually slides along the second slide groove 301 towards the end furthest from the display screen. Thus, when the hinge mechanism is in the folded state, the second slider 202 is positioned in the second slide groove 301 at the end furthest from the display screen. This allows the first swing arm 210 to rotate relative to the first support 310 as a whole. Therefore, while the rotation angle of the first support 310 relative to the base 100 and the parameters of the first slider 201 and other components remain unchanged, the rotation angle of the first swing arm 210 relative to the base 100 is reduced. Consequently, the overlap between the first slider 201 and the first slide groove 111 in the hinge mechanism in the folded state is still relatively large, improving the reliability of the hinge mechanism.

[0052] As described above, the hinge mechanism disclosed in this application includes a third swing arm 401 and a fourth swing arm 402, which are connected in a transmission manner to enable the first housing and the second housing in the electronic device to rotate synchronously towards or away from each other. Specifically, the third swing arm 401 and the first swing arm 210 are both located on the same side of the base 100, while the fourth swing arm 402 and the second swing arm 220 are both located on the other side of the base 100. In the hinge mechanism, to improve the synchronous stability of the first housing and the second housing, the dimensions of the third swing arm 401 and the fourth swing arm 402 in the aforementioned rotational axis are typically made relatively large to prevent the first housing and the second housing from rubbing or twisting relative to each other during relative rotation, thereby improving the reliability of the electronic device and the user experience.

[0053] However, when using the above technical solution, the space occupied by the third swing arm 401 and the fourth swing arm 402 in the hinge mechanism along the rotation axis is relatively large, which is not conducive to the development of hinge mechanisms and electronic devices towards thinner and smaller designs. Therefore, in the embodiments of this application, as... Figure 1 and Figure 6 As shown, the third swing arm 401 may include a first arm body 410 and a second arm body 420. By arranging the first arm body 410 and the second arm body 420 at intervals along the aforementioned rotational axis, the overall size of the third swing arm 401 along the aforementioned rotational axis can be reduced, thereby reducing the space it occupies in that direction. Simultaneously, because the first arm body 410 and the second arm body 420 are spaced apart along the aforementioned rotational axis, although the overall size of the third swing arm 401 is relatively small, the relatively large span of the first arm body 410 and the second arm body 420 along the aforementioned rotational axis, and their synchronous movement, still ensures that the third swing arm 401 can provide good anti-torsional protection for the first support 310, preventing relative torsion of the first housing and the second housing of the electronic device during relative rotation.

[0054] Furthermore, both the first arm 410 and the second arm 420 are rotatably connected to the base 100, and both are slidably engaged with the first support 310 in a direction perpendicular to the aforementioned rotation axis, so as to ensure that the movements of the first arm 410 and the second arm 420 are synchronized. That is, the second arm 420 moves relative to the base 100 and the first support 310 in the same way as the first arm 410 moves relative to the base 100 and the first support 310.

[0055] More specifically, the first arm 410 includes a first rotating part 411 and a first connecting part 412 fixedly connected, and the second arm 420 includes a second rotating part 421 and a second connecting part 422 fixedly connected. Both the first rotating part 411 and the second rotating part 421 are rotatably connected to the base 100, allowing both the first arm 410 and the second arm 420 to form a rotational engagement with the base 100. As described above, the hinge mechanism disclosed in this application includes a first bracket 310. By allowing the first connecting part 412 and the second connecting part 422 to slide in a direction perpendicular to the axial direction with the first bracket 310, and by fixing the first bracket 310 to the first housing of the electronic device, the entire third swing arm 401 can form a linkage relationship with the first housing of the electronic device. This also increases the independence of the hinge mechanism, facilitating its processing and assembly.

[0056] To ensure the synchronization capability of the third swing arm 401 and the fourth swing arm 402, as described above, the hinge mechanism disclosed in this application includes a first synchronization engagement member 501 and a second synchronization engagement member 502. By linking the first synchronization engagement member 501 and the second synchronization engagement member 502 together and movably mounting them on the base 100, they can provide synchronization for the third swing arm 401 and the fourth swing arm 402. Specifically, when different structures are adopted for the first synchronization engagement member 501 and the second synchronization engagement member 502, the engagement relationship between them can also be varied. For example, the first synchronization engagement member 501 and the second synchronization engagement member 502 can be rotatably connected, or they can be fixedly connected.

[0057] Correspondingly, when the specific structures of the first synchronizing component 501 and the second synchronizing component 502 are different, their movable engagement relationships with the base 100 may also differ. For example, both the first synchronizing component 501 and the second synchronizing component 502 can have a sliding engagement relationship with the base, or both can have a rotational engagement relationship with the base. Of course, regardless of the structure of the first synchronizing component 501 and the second synchronizing component 502, their structural forms are the same to ensure that they can provide synchronization for the third swing arm 401 and the fourth swing arm 402 through their own linkage relationship.

[0058] More specifically, the first arm 410 and the second arm 420 of the third swing arm 401 are both driven to engage with the first synchronous engagement member 501, and the fourth swing arm 402 is driven to engage with the second synchronous engagement member 502, so that the third swing arm 401 and the fourth swing arm 402 can rotate in opposite directions relative to the base 100, thereby enabling the electronic device using this hinge mechanism to switch between an unfolded state and a folded state.

[0059] Furthermore, as described above, the hinge mechanism disclosed in this application also includes an elastic element 610 and a cam element 620, which cooperate with each other to enable the hinge mechanism to have a hovering ability, thereby allowing the display screen of the electronic device to remain bent and expanding the application scenarios of the electronic device. The cam element 620 is slidably mounted on the base 100 along the aforementioned rotational axis, and the cam element 620 and the base 100 are also relatively fixed in the direction surrounding the aforementioned rotational axis. This ensures that when the cam element 620 is pressed by other cam surfaces rotating relative to the base 100, the cam element 620 can slide relative to the base 100 along the aforementioned rotational axis to convert the rotational motion into a linear motion, and allows the cam element 620 to apply a driving force to the elastic element 610.

[0060] Specifically, the third swing arm 401 may be equipped with a cam element 620, and the second arm 420 of the third swing arm 401 may be equipped with a cam element 620 on one end face away from its first arm 410, so that the second arm 420 can form a cam engagement relationship with the cam element 620, and during the rotation of the second arm 420 relative to the base 100, the cam element 620 can be driven to move relative to the base 100 along the aforementioned rotation axis.

[0061] Correspondingly, in the rotational axis, one end of the elastic element 610 abuts against the side of the cam element 620 away from its cam surface, and the other end of the elastic element 610 is relatively fixed to the base 100. Thus, during the rotation of the second arm 420 of the third swing arm 401 to compress the cam element 620, the cam element 620 can apply a force to the elastic element 610, allowing the elastic element 610 to store elastic potential energy. Furthermore, during the interaction between the top of the cam surface of the cam element 620 and the top of the cam surface on the second arm 420, the elastic element 610 can apply an elastic force to the third swing arm 401, so that the third swing arm 401 can form a relatively fixed relationship with the base 100 in the rotational axis without the action of other external forces, thereby enabling the hinge mechanism to have a hovering capability.

[0062] Of course, during the arrangement of the elastic element 610, the length of the elastic element 610 or the elastic state of the elastic element 610 needs to be determined according to the fit relationship between the two opposing cam surfaces. More specifically, during the process of the cam surfaces of the third rocker arm 401 and its corresponding cam element 620 moving away from each other, it is necessary to ensure that the elastic element 610 can be compressed. That is, during the process of the cam surfaces moving away from each other, the elastic element 610 stores elastic potential energy, so that as the two opposing cam surfaces continue to rotate, and after the protrusion of one cam surface passes over the protrusion of the other cam surface, the elastic element 610 can drive the two cam surfaces to continue rotating relative to each other until the protrusion of one cam surface is directly opposite the concave part of the other cam surface.

[0063] That is, in the hinge mechanism disclosed in the above embodiments, when the protrusion of one cam surface is directly opposite the concave part of another cam surface, if it is necessary to make the two cam surfaces rotate relative to each other, it is necessary to overcome the elastic force of the elastic element 610. This enables the hinge mechanism to have damping capability, and by controlling the specific parameters of the cam surface, the hinge mechanism can have the ability to hover at a corresponding angle. This article does not limit this.

[0064] More specifically, the elastic element 610 can be a compression spring, and it can be positioned on the side of the cam element 620 corresponding to the third rocker arm 401 away from the third rocker arm 401. This allows one end of the elastic element 610 to abut against the side of the cam element 620 away from its cam surface, and the other end of the elastic element 610 to be fixedly connected to the base 100 by abutment or other means. This ensures that the elastic element 610 can stably provide elasticity and reduces the installation difficulty of the elastic element 610 and the layout difficulty of other components in the hinge mechanism. For ease of description, the following description assumes that the elastic element 610 adopts the technical solution disclosed in this embodiment.

[0065] As described above, the elastic element 610 abuts against the end face of the cam element 620. To further improve the hovering stability of the hinge mechanism, even when the protrusion of the cam surface of one of the cam elements 620 and the concave cam surface of the third swing arm 401 aligns with the concave cam surface of the other, the elastic element 610 can still maintain a certain elastic force. This ensures that the elastic element 610 can always apply an elastic force to the cam element 620. In this case, the elastic element 610 can also apply an elastic force to the second arm 420 of the third swing arm 401 through the cam element 620, causing the second arm... The body 420 is compressed in the aforementioned rotational axis, thereby enabling the second arm body 420 to form a relatively stable relative fixed relationship with the base 100 in the aforementioned rotational axis. This eliminates the gap between the second arm body 420 and the base 100 caused by the dimensional allowance in the rotational axis that the second arm body 420 needs to form a rotational fit with the base 100. This improves the assembly accuracy and movement stability of the second arm body 420, thereby making the fit between the entire third swing arm 401, the base 100, and the first support 310 more reliable.

[0066] This application discloses a hinge mechanism, in which a third swing arm 401 and a fourth swing arm 402 are respectively provided on opposite sides of a base 100. Both swing arms are rotatably engaged with the base 100, thereby allowing the hinge mechanism to switch between an unfolded state and a folded state. Furthermore, a first swing arm 210 is provided on the side of the base 100 where the third swing arm 401 is located. The first swing arm 210 slides with an arc-shaped first slider 201 on the base 100 via an arc-shaped first slide groove 111, enabling the first swing arm 210 to form a rotatable engagement with the base 100. Meanwhile, one of the first support 310 and the first swing arm 210 is provided with a second slide groove 301, and the other is provided with a second slider 202. The second slider 202 can slide in the second slide groove 301 in a straight line, and the second slide groove 301 has a component extending along the thickness direction of the first support 310, so that the end of the first swing arm 210 connected to the first support 310 has the ability to move relative to the first support 310. Thus, by designing parameters such as the first slider 201 of the first swing arm 210, during the rotation of the first support 310 relative to the base 100 in the first direction, the second slider 202 can slide in the second slide groove 301, so that the first swing arm 210 can move relative to the base 100. While rotating in the first direction, the first swing arm 210 can also rotate relative to the first support 310 in a second direction opposite to the first direction. Thus, while keeping parameters such as the rotation angle between the first support 310 and the base 100 unchanged, the rotation angle between the first swing arm 210 and the base 100 is relatively reduced. This reduces the size of the portion of the first slider 201 that slides out of the first groove 111. In other words, when the hinge mechanism disclosed in this application is in a folded state, the overlap between the first slider 201 and the first groove 111 is still relatively large. This can improve the stability of the fit between the first slider 201 and the first groove 111, thereby improving the reliability of the hinge mechanism.

[0067] In addition, to improve the torsional resistance of the hinge mechanism, in this embodiment, the third swing arm 401 includes a first arm 410 and a second arm 420 spaced apart along the aforementioned rotation axis, ensuring that the relatively small-sized third swing arm 401 can have a large span along the aforementioned rotation axis. Accordingly, both the first arm 410 and the second arm 420 are rotatably engaged with the base 100, and both are also slidably engaged with the first bracket 310 in a direction perpendicular to the rotation axis, so as to ensure that the movements of the first arm 410 and the second arm 420 are consistent.

[0068] Meanwhile, through the linkage of the first synchronous engagement member 501 and the second synchronous engagement member 502, the third swing arm 401 and the fourth swing arm 402 can form a transmission engagement relationship, so that the third swing arm 401 and the fourth swing arm 402 can synchronously generate opposite rotational movements relative to the base 100, enabling the hinge mechanism to have the ability to rotate synchronously.

[0069] Furthermore, by equipping the third swing arm 401 with an elastic element 610 and a cam element 620, the third swing arm 401 gains the ability to hover relative to the base 100, expanding the application scenarios of electronic devices using this hinge mechanism. Specifically, the elastic element 610 abuts against the side of the second arm 420 of the third swing arm 401 opposite to the first arm 410 via the cam element 620. By giving the elastic element 610 a preset elastic force, it can constantly compress the second arm 420 via the cam element 620. This ensures that the second arm 420 and the base 100 essentially do not experience relative movement along the aforementioned rotational axis, thereby improving the operational stability of the second arm 420 and ultimately enhancing the structural precision and reliability of the entire hinge mechanism.

[0070] As described above, the first bracket 310 and the first swing arm 210 can be connected to each other through the sliding fit of the second slide groove 301 and the second slider 202. As for the rotational connection structure between the second bracket 320 and the second swing arm 220, it can still be a traditional shaft hole connection structure, which can ensure that the second bracket 320 and the second swing arm 220 can form a rotational fit relationship.

[0071] In order to make the reliability between the second bracket 320 and the second swing arm 220 relatively high, in another embodiment of this application, one of the second swing arm 220 and the second bracket 320 may be provided with a second slider 202, and the other may be provided with a second groove 301. The second groove 301 has a component extending along the thickness direction of the second bracket 320, and the second slider 202 is slidably installed in the second groove 301. When the second support 320 and the second swing arm 220 adopt the aforementioned structure, when the second support 320 rotates relative to the base 100 in the second direction, the second swing arm 220 can also rotate relative to the base 100 in the second direction while simultaneously utilizing the relative sliding relationship between the second slider 202 and the second slide groove 301. This allows the end of the second swing arm 220 connected to the second support 320 to move relative to the second support 320, thereby enabling the entire second swing arm 220 to rotate relative to the second support 320 in the first direction. As a result, while the rotation angle of the first support 310 relative to the base 100 remains unchanged, the rotation angle of the second swing arm 220 relative to the base 100 is reduced, so that the overlap between the first slider 201 and the corresponding first slide groove 111 of the second swing arm 220 remains relatively large, improving the connection stability between the second swing arm 220 and the base 100, and further enhancing the reliability of the hinge mechanism.

[0072] As described above, the second slide groove 301 can be disposed on the first bracket 310 or on the first swing arm 210. To reduce the processing difficulty of each component, in this embodiment, the second slide groove 301 can be disposed on the first bracket 310, and correspondingly, the first swing arm 210 includes the second slider 202. As for the extension direction of the second slide groove 301, as described above, the second slide groove 301 has a component along the thickness direction of the first bracket 310. Based on this, optionally, the extension direction of the second slide groove 301 is parallel to the thickness direction of the first bracket 310. In this case, when the hinge mechanism is in the folded state, the rotation angle of the first bracket 310 relative to the base 100 is 90°. At this time, the extension direction of the second slide groove 301 is parallel to the thickness direction of the electronic device in the folded state, or in other words, the extension direction of the second slide groove 301 is simultaneously perpendicular to the thickness direction of the base 100 and the rotation axis of the hinge mechanism.

[0073] In another embodiment of this application, the extension direction of the second slide groove 301 can be inclined relative to the thickness direction of the first bracket 310. Accordingly, when the rotation angle of the first bracket 310 relative to the base 100 is 90°, and the hinge mechanism is in a folded state, the extension direction of the second slide groove 301 is also inclined relative to the thickness direction of the folded electronic device. In other words, there is an angle α between the extension direction of the second slide groove 301 and the thickness direction of the first bracket 310, and 0° < α < 90°.

[0074] Furthermore, when the hinge mechanism is in the folded state, the first bracket 310 and the second bracket 320 are arranged opposite to each other, and the space sandwiched between the first bracket 310 and the second bracket 320 is the screen accommodating space. The second slide groove 301, which is inclined relative to the thickness direction of the first bracket 310, can be inclined in an inward-high, outward-low manner. Specifically, when the hinge mechanism is in the folded state, the distance between the end of the second slide groove 301 on the first bracket 310 near the second bracket 320 and the base 100 is greater than the distance between the end of the second slide groove 301 away from the second bracket 320 and the base 100.

[0075] When the electronic device using the hinge mechanism is in a folded state and accidentally falls, and the side of the hinge mechanism where the base 100 is located contacts the ground and collides, the interaction force between the first support 310 and the first swing arm 210 along the thickness direction of the base 100 can be decomposed into two mutually perpendicular components. The component along the thickness direction of the base 100 is necessarily smaller than the total force, thus weakening the interaction between the first support 310 and the first swing arm 210, reducing the probability of damage to both and other related components. The other component is perpendicular to both the thickness direction of the base 100 and the rotation axis of the hinge mechanism, and its direction points from the outside of the first support 310 to the inside. This component enhances the tightness of the fit between the first support 310 and the first swing arm 210, preventing the impact force from loosening the components of the electronic device during a fall.

[0076] Similarly, when the second bracket 320 also has a second slide groove 301, the structure of the second slide groove 301 on the second bracket 320 can be designed to correspond with the structure of the second slide groove 301 on the first bracket 310. In other words, the second slide groove 301 on the first bracket 310 and the second slide groove 301 on the second bracket 320 can be arranged symmetrically facing each other. That is, when the hinge mechanism is in the folded state, the distance between the end of the second slide groove 301 on the second bracket 320 closer to the first bracket 310 and the base 100 is greater than the distance between the end of the second slide groove 301 farther from the first bracket 310 and the base 100.

[0077] As described above, the hinge mechanism disclosed in this application includes a third swing arm 401 and a fourth swing arm 402, which provide a synchronous function, enabling the first housing and the second housing of the electronic device to rotate synchronously towards or away from each other. Furthermore, the third swing arm 401 and the fourth swing arm 402 form the aforementioned synchronous relationship through a first synchronous engagement member 501 and a second synchronous engagement member 502. Specifically, both the first synchronous engagement member 501 and the second synchronous engagement member 502 can be gear-like structural components; that is, the third swing arm 401 and the fourth swing arm 402 can form a synchronous rotational relationship through a gear or gear set structure, enabling them to rotate simultaneously towards or away from each other. To further reduce the overall thickness of the hinge mechanism, in another embodiment of this application, both the first synchronous engagement member 501 and the second synchronous engagement member 502 are provided with driving surfaces inclined relative to the aforementioned rotation axis. By also providing corresponding inclined surfaces for the third swing arm 401 and the fourth swing arm 402, the third swing arm 401 and the fourth swing arm 402 can also form a synchronous rotational relationship.

[0078] In detail, combined Figure 1 , Figure 4 and Figure 6 The first synchronous mating component 501 and the second synchronous mating component 502 are relatively fixed in the rotational axis of the hinge mechanism, and both are slidably connected to the base 100. Therefore, when they move relative to the base 100 along the rotational axis of the hinge mechanism, the movement distance and direction of the first synchronous mating component 501 and the second synchronous mating component 502 are the same. Specifically, the first synchronous mating component 501 and the second synchronous mating component 502 can be integrally formed, so that they are connected as one piece, thereby enabling the first synchronous mating component 501 and the second synchronous mating component 502 to form a relatively fixed relationship in the axial direction of the hinge mechanism. Alternatively, the first synchronous mating component 501 and the second synchronous mating component 502 can be separately formed, and a connecting component or other structure can be used to provide a fixing effect for the first synchronous mating component 501 and the second synchronous mating component 502 in the axial direction of the hinge mechanism.

[0079] At the same time, such as Figure 6 As shown, the first synchronizing component 501 has a first inclined surface 510, the second synchronizing component 502 has a second inclined surface 520, the third swing arm 401 has a third inclined surface 411a, and the fourth swing arm 402 has a fourth inclined surface 421a. The third inclined surface 411a and the first inclined surface 510 are opposite to and cooperate with each other along the aforementioned rotational axis, and the fourth inclined surface 421a and the second inclined surface 520 are opposite to and cooperate with each other along the aforementioned rotational axis. That is, the third swing arm 401 and the first synchronizing component 501 correspond to and cooperate with each other, and the fourth swing arm 402 and the second synchronizing component 502 correspond to and cooperate with each other.

[0080] Specifically, the first inclined surface 510, the second inclined surface 520, the third inclined surface 411a, and the fourth inclined surface 421a are all surfaces inclined relative to the axial direction of the hinge mechanism. Two of these surfaces, arranged opposite each other, are capable of cooperating. When one of the cooperating surfaces rotates relative to the base 100, the contact between their respective inclined surfaces can convert the rotational motion of one surface into the axial motion of the other. That is, during the relative rotation of one of the cooperating components (such as the third swing arm 401 and the first synchronous cooperating component 501, or the fourth swing arm 402 and the second synchronous cooperating component 502) relative to the base 100 along the axial direction of the hinge mechanism, the inclined surface cooperation between the two components can be used to cause the other component to produce a linear motion relative to the base 100 along the axial direction of the hinge mechanism. Conversely, during the linear motion of one component relative to the base 100, the other component can also produce a rotational motion relative to the base 100.

[0081] Accordingly, based on the different parameters of the aforementioned mating surfaces and the different rotation directions of the third swing arm 401 and the fourth swing arm 402 relative to the base 100, during the relative rotation of the two mating devices along the axial direction, the two mating devices will move closer to each other or move further away from each other along the axial direction.

[0082] Meanwhile, to ensure that the third swing arm 401 and the fourth swing arm 402 have the ability to rotate synchronously relative to the base 100, in this embodiment, the first inclined surface 510 and the second inclined surface 520 are arranged opposite to each other along the axial direction of the hinge mechanism. In other words, taking the first end of the first synchronous engaging member 501 and the first end of the second synchronous engaging member 502 as an example, the first inclined surface 510 can be arranged at the first end of the first synchronous engaging member 501, and the second inclined surface 520 can be arranged at the second end of the second synchronous engaging member 502. That is, in the axial direction of the hinge mechanism, the first inclined surface 510 and the second inclined surface 520 are oriented in opposite directions, thereby allowing the third inclined surface 411a to be arranged on the side of the first inclined surface 510 away from the first synchronous engaging member 501, and the fourth inclined surface 421a to be arranged on the side of the second inclined surface 520 away from the second synchronous engaging member 502.

[0083] When the above technical solution is adopted, taking the third swing arm 401 as the active driving member as an example, the third swing arm 401 can push the first inclined surface 510 along the aforementioned axial direction relative to the base 100 through its third inclined surface 411a. Taking the two as moving away from each other as an example, the third swing arm 401 can drive the first synchronous cooperating member 501 to move away from the aforementioned third inclined surface 411a along the aforementioned axial direction. In this case, the first synchronous cooperating member 501 can also drive the second synchronous cooperating member 502 to move away from the aforementioned third inclined surface 411a, thereby enabling the second synchronous cooperating member 502 to apply an axial driving force to the fourth swing arm 402. Under the action of the cooperation relationship between the second inclined surface 520 and the fourth inclined surface 421a, the fourth swing arm 402 can passively rotate relative to the base 100 in a direction opposite to the rotation direction of the third swing arm 401, so as to provide clearance space for the axial movement of the second synchronous cooperating member 502.

[0084] In summary, when the third swing arm 401 rotates relative to the base 100 as the active driving member, the third inclined surface 411a can push against the first inclined surface 510, so that the third swing arm 401 can transmit its rotational motion to the first synchronous cooperating member 501, and drive the first synchronous cooperating member 501 and the second synchronous cooperating member 502 to move along the axial direction of the hinge mechanism towards the first end of the base 100; at the same time, the linear motion force of the second synchronous cooperating member 502 can act on the fourth swing arm 402, so that the second inclined surface 520 pushes against the fourth inclined surface 421a, thereby driving the fourth swing arm 402 to rotate relative to the base 100, so that the fourth swing arm 402 and the third swing arm 401 have the ability to rotate synchronously relative to the base 100.

[0085] Conversely, when the fourth swing arm 402 rotates relative to the base 100 as the active driving member, the fourth inclined surface 421a can push the second inclined surface 520 so that the fourth swing arm 402 can transmit its rotational motion to the second synchronous cooperating member 502, and drive the second synchronous cooperating member 502 and the first synchronous cooperating member 501 to move along the axial direction of the hinge mechanism towards the second end of the base 100; at the same time, the linear motion force of the first synchronous cooperating member 501 can act on the third swing arm 401, thereby pushing the third inclined surface 411a through the first inclined surface 510 to drive the third swing arm 401 to rotate relative to the base 100 in a direction opposite to the rotation direction of the fourth swing arm 402, so that the fourth swing arm 402 and the third swing arm 401 have the ability to rotate synchronously relative to the base 100.

[0086] In the above description, the above-mentioned technical objective can be achieved by designing the inclination directions of the third inclined surface 411a, the first inclined surface 510, the fourth inclined surface 421a, and the second inclined surface 520 in the hinge mechanism. In a specific embodiment of this application, as... Figure 7 As shown, the first inclined surface 510 can include a first helical driving surface 511, a second helical driving surface 512, a first cutoff end surface 513, and a second cutoff end surface. Along the direction surrounding the rotation axis, the first helical driving surface 511, the first cutoff end surface 513, the second helical driving surface 512, and the second cutoff end surface are sequentially connected, with the second cutoff end surface connected to the first helical driving surface 511. This allows the four components to be connected end-to-end, forming a closed loop shape. Thus, the first inclined surface 510 includes two inclined surfaces for providing driving action, namely the first helical driving surface 511 and the second helical driving surface 512, improving both the driving and driven effects of the first inclined surface 510. Furthermore, by making the first cutoff end surface 513 and the second cutoff end surface parallel to each other and both perpendicular to the rotation axis, both the first cutoff end surface 513 and the second cutoff end surface have a mutual limiting effect with the third swing arm 401 in the rotation axis, further improving the driving and driven effects of the first synchronous mating member 501.

[0087] Of course, when the first inclined surface 510 adopts the technical solution disclosed in the above embodiments, the structure of the third inclined surface 411a of the third swing arm 401 that cooperates with the first inclined surface 510 can also be designed with reference to the structure of the first inclined surface 510, so as to improve the interaction between the two. Similarly, the second inclined surface 520 and the fourth inclined surface 421a can also be designed with reference to the structure of the first inclined surface 510, so as to improve the synchronization performance between the third swing arm 401 and the fourth swing arm 402.

[0088] Regarding the technical solution described above, where the first synchronous mating component 501 includes a first inclined surface 510 and the second synchronous mating component 502 includes a second inclined surface 520, another explanation is given below.

[0089] When the hinge mechanism is in the unfolded state, along the rotation axis of the hinge mechanism, the distance between the first synchronizing member 501 and the end of the third swing arm 401 facing away from the third inclined plane 411a is the first distance, and the distance between the second synchronizing member 502 and the end of the fourth swing arm 402 facing away from the fourth inclined plane 421a is the second distance; when the hinge mechanism is in the folded state, along the axial direction, the distance between the first synchronizing member 501 and the end of the third swing arm 401 facing away from the third inclined plane 411a is the third distance, and the distance between the second synchronizing member 502 and the end of the fourth swing arm 402 facing away from the fourth inclined plane 421a is the fourth distance; wherein, the third distance is less than the first distance, and the fourth distance is greater than the second distance.

[0090] In other words, during the transition of the hinge mechanism from the unfolded state to the folded state, the fourth swing arm 402 can act as an active driving component. It can drive the second synchronous cooperating component 502 and the first synchronous cooperating component 501 to move axially relative to the base 100 and away from the fourth swing arm 402 by rotating relative to the base 100. This increases the distance between the second synchronous cooperating component 502 and the end of the fourth swing arm 402 away from the fourth inclined surface 421a from the second distance to the fourth distance, and decreases the distance between the first synchronous cooperating component 501 and the end of the third swing arm 401 away from the third inclined surface 411a from the first distance to the third distance. Correspondingly, under the linear action of the first synchronous cooperating component 501, the third swing arm 401 rotates relative to the base 100 to avoid the first synchronous cooperating component 501, thus achieving the purpose of the third swing arm 401 and the fourth swing arm 402 rotating synchronously relative to the base 100.

[0091] Correspondingly, during the process of the hinge mechanism switching from the folded state to the unfolded state, the third swing arm 401 can be used as the active driving member, and the rotation of the third swing arm 401 can be applied to the first synchronous cooperating member 501, switching to the linear movement of the first synchronous cooperating member 501 and the second synchronous cooperating member 502, which in turn acts on the fourth swing arm 402, causing the fourth swing arm 402 to rotate relative to the base 100.

[0092] In the hinge mechanism disclosed in the above embodiments, a third swing arm 401 and a fourth swing arm 402 are rotatably connected to opposite sides of the base 100, and a first synchronous engagement member 501 and a second synchronous engagement member 502 are slidably mounted on the base 100 and fixed relative to each other along the axial direction of the hinge mechanism. The third swing arm 401, the fourth swing arm 402, the first synchronous engagement member 501 and the second synchronous engagement member 502 are respectively provided with a third inclined surface 411a, a fourth inclined surface 421a, a first inclined surface 510 and a second inclined surface 52. 0, and the third inclined surface 411a is opposite and engaged with the first inclined surface 510, and the fourth inclined surface 421a is opposite and engaged with the second inclined surface 520. This enables the third swing arm 401 and the first synchronous engaging member 501, as well as the fourth swing arm 402 and the second synchronous engaging member 502, to switch between linear motion and rotational motion relative to the base 100, thereby enabling the third swing arm 401 and the fourth swing arm 402 to rotate synchronously relative to the base 100. At the same time, by making the first inclined surface 510 and the second inclined surface 520 opposite to each other along the axial direction of the hinge mechanism, the axial force of the hinge mechanism can be transmitted sequentially among the third swing arm 401, the first synchronous engaging member 501 (and the second synchronous engaging member 502), and the fourth swing arm 402, thereby ensuring that the third swing arm 401 and the fourth swing arm 402 have the ability to rotate synchronously relative to the base 100.

[0093] Furthermore, in the hinge mechanism disclosed in the embodiments of this application, since the first synchronous engagement member 501 and the second synchronous engagement member 502 are not gear-type structural members, the thickness of the first synchronous engagement member 501 and the second synchronous engagement member 502 can be reduced to a certain extent during the design process (i.e., the dimensions of the two members in the thickness direction of the base 100, or the dimensions in the thickness direction of the electronic device in the unfolded state). This allows the thickness of the entire hinge mechanism to be relatively small, which is beneficial for the electronic device using the aforementioned hinge mechanism to develop towards thinner and lighter designs.

[0094] Based on the hinge mechanism with the above structure disclosed in the embodiments of this application, further, when the hinge mechanism is in one of the unfolded state and the folded state, the second inclined surface 520 is in contact with the fourth inclined surface 421a; correspondingly, when the hinge mechanism is in the other of the unfolded state and the folded state, the first inclined surface 510 is in contact with the third inclined surface 411a.

[0095] For example, when the hinge mechanism is in the unfolded state, the distance between the fourth swing arm 402 and the second synchronous engagement member 502 can be minimized. Correspondingly, when the hinge mechanism is in the folded state, the distance between the third swing arm 401 and the first synchronous engagement member 501 can be minimized. By adopting the above technical solution, on the one hand, the interaction effect between corresponding components of the third swing arm 401, fourth swing arm 402, first synchronous engagement member 501, and second synchronous engagement member 502 when the hinge mechanism is in a critical state can be reduced, thus improving the service life of each component. On the other hand, the overall axial dimension of the hinge mechanism can be made relatively small.

[0096] Furthermore, in the aforementioned hinge mechanism, since the first inclined surface 510 and the second inclined surface 520 are arranged opposite to each other along the aforementioned axial direction, in order to make the overall hinge structure's axial dimension relatively smaller, the lengths of the first synchronizing member 501 and the second synchronizing member 502 can be made substantially equal, and they can be distributed in a direction perpendicular to the axial direction of the hinge mechanism. That is, they can be arranged substantially flush along the axial direction of the hinge mechanism. In this case, the sum of the dimensions occupied by the first synchronizing member 501 and the second synchronizing member 502 along the axial direction of the hinge mechanism is relatively small, thereby reducing the axial dimension of the hinge mechanism itself.

[0097] To further improve the usability of the hinge mechanism and the corresponding electronic device, as described above, the hinge mechanism disclosed in this application also includes a damping component to enable the hinge mechanism and electronic device to have a hovering capability, that is, to enable the electronic device to hover in other states between the unfolded state and the folded state, thereby improving the usability of the device and thus enhancing the user experience.

[0098] When the third swing arm 401 includes a first arm body 410 and a second arm body 420, the first arm body 410 may be provided with a third inclined surface 411a, and the end of the second arm body 420 away from the first arm body 410 may be provided with a cam surface, thereby enabling the end of the second arm body 420 away from the first arm body 410 to engage with the cam of the cam member 620.

[0099] To further improve the stability of the synchronous transmission relationship between the third swing arm 401 and the fourth swing arm 402, based on the above embodiment, the third swing arm 401 can also have a fourth inclined surface 421a, and the fourth swing arm 402 can also have the third inclined surface 411a. The first synchronous cooperating member 501 can also have a second inclined surface 520, and the second synchronous cooperating member 502 can also have a second inclined surface 520. In this case, whether the hinge mechanism switches from the unfolded state to the folded state or from the folded state to the unfolded state, the third swing arm 401 and the fourth swing arm 402 can act as active driving members independently, thereby reducing the difficulty of using the hinge mechanism and its vulnerability, and improving the user experience.

[0100] More specifically, when the first synchronizing member 501 has a first inclined surface 510 and a second inclined surface 520, the third swing arm 401 corresponding to the first synchronizing member 501 has a third inclined surface 411a and a fourth inclined surface 421a. In the aforementioned axial direction, the first synchronizing member 501 can be sandwiched between the third inclined surface 411a and the fourth inclined surface 421a of the third swing arm 401. Simultaneously, the third inclined surface 411a of the third swing arm 401 is opposite to and engages with the first inclined surface 510 of the first synchronizing member 501, and the fourth inclined surface 421a of the third swing arm 401 is opposite to and engages with the second inclined surface 520 of the first synchronizing member 501. Similarly, the second synchronizing member 502 can be sandwiched between the third inclined surface 411a and the fourth inclined surface 421a of the fourth swing arm 402, with their respective inclined surfaces correspondingly opposite each other and engaging with each other.

[0101] Furthermore, as described above, the dimensions of the first synchronizing member 501 and the second synchronizing member 502 can be made approximately equal, and they can be arranged substantially flush in the axial direction to reduce the overall axial dimension of the hinge mechanism. Based on this, during the arrangement of the third swing arm 401 and the fourth swing arm 402, they can also be arranged flush in a direction perpendicular to the axial direction, so that the third swing arm 401 and the fourth swing arm 402 are also substantially flush in the axial direction, resulting in a relatively small axial dimension of the hinge mechanism.

[0102] As described above, the third inclined surface 411a and the fourth inclined surface 421a of the third swing arm 401 and the fourth swing arm 402 are spaced apart from each other in the axial direction. Therefore, when the third swing arm 401 includes a first arm body 410 and a second arm body 420, the second arm body 420 of the third swing arm 401 may be provided with the fourth inclined surface 421a. Similarly, as with the third swing arm 401, the fourth swing arm 402 may also include a first arm body 410 and a second arm body 420 spaced apart along the aforementioned rotation axis, and the first arm body 410 of the fourth swing arm 402 may be provided with the third inclined surface 411a, and the second arm body 420 of the fourth swing arm 402 may be provided with the fourth inclined surface 421a. In addition, as described above, the first inclined surface 510 on the first synchronous fitting member 501 and the second inclined surface 520 on the second synchronous fitting member 502 are arranged opposite to each other along the aforementioned rotation axis. Therefore, the distribution direction of the first arm body 410 and the second arm body 420 of the fourth swing arm 402 can be opposite to the distribution direction of the first arm body 410 and the second arm body 420 in the third swing arm 401.

[0103] Accordingly, in order to ensure that the first synchronous fitting 501 can still be clamped between the third inclined surface 411a and the fourth inclined surface 421a of the third swing arm 401, the first rotating part 411 and the second rotating part 421 are spaced apart and fixedly arranged in the above-mentioned rotation axis, and the first connecting part 412 and the second connecting part 422 are spaced apart and fixedly arranged. When the third swing arm 401 includes the first arm body 410 and the second arm body 420, the portion of the third swing arm 401 that connects to the first support 310 has a relatively large axial span due to the spacing between the first connecting portion 412 and the second connecting portion 422. This improves the stability of the fit between the third swing arm 401 and the first support 310. At the same time, the axial spacing between the first connecting portion 412 and the second connecting portion 422 allows the third swing arm 401 to engage with the first support 310 through a double sliding fit structure. This further improves the fit accuracy between the third swing arm 401 and the first support 310 and enhances the smoothness of the movement between the third swing arm 401 and the first synchronous engagement member 501.

[0104] Alternatively, a connecting beam or similar structure can be provided between the first connecting portion 412 and the second connecting portion 422 to allow the first arm 410 and the second arm 420 to form a relatively fixed relationship in the aforementioned axial direction. More specifically, a fixing bracket 650, as mentioned below, can be provided between the first arm 410 and the second arm 420 of the third swing arm 401, and the fixing bracket 650 provides a limiting function for the first arm 410 and the second arm 420 in the aforementioned rotational axis. Similarly, when the fourth swing arm 402 also includes a first arm 410 and a second arm 420, a corresponding fixing bracket 650 can also be provided to provide a limiting function for the first arm 410 and the second arm 420 of the fourth swing arm 402 along the aforementioned rotational axis.

[0105] As described above, the first arm 410 and the second arm 420 of the third swing arm 401 are both slidably engaged with the first support 310. Therefore, as follows: Figure 6 As shown, two axial limiting structures can be provided on the first bracket 310, and both axial limiting structures have sliding grooves. The first connecting part 412 and the second connecting part 422 of the third swing arm 401 can respectively extend into the sliding grooves of the two axial limiting structures, so that the first connecting part 412 and the second connecting part 422 can slide with the first bracket 310 in the direction perpendicular to the axial direction. At the same time, the two axial limiting structures can also restrict the relative positional relationship between the first connecting part 412 and the second connecting part 422 and the first bracket 310 in the axial direction, thereby preventing the first connecting part 412 and the second connecting part 422 from moving relative to the first bracket 310 in the axial direction.

[0106] By employing the above-mentioned technical solution to limit the axial positional relationship between the third swing arm 401 and the first bracket 310, it is unnecessary to pre-fix the first arm 410 and the second arm 420, thereby further reducing the processing and assembly difficulty of the hinge mechanism. Furthermore, by increasing the dimension of the axial limiting structure in the extension direction of the first connecting portion 412 to a certain extent, the limiting fit dimension between the axial limiting structure and the first arm 410 (and the second arm 420) in the direction perpendicular to the axial direction can also be increased, thereby further enhancing the limiting effect of the axial limiting structure.

[0107] As described above, the above embodiments specifically introduced the structure and assembly relationship of the third swing arm 401. Similarly, the fourth swing arm 402 can be designed with reference to the structure of the third swing arm 401 described in the above embodiments, so that the cooperation stability between the fourth swing arm 402 and the second bracket 320, and between the fourth swing arm 402 and the base 100 is relatively high, thereby improving the overall performance of the hinge mechanism.

[0108] As described above, a cam member 620 can be provided on the side of the third rocker arm 401 opposite to its third inclined surface 411a. Based on this, when both the third rocker arm 401 and the fourth rocker arm 402 have a third inclined surface 411a and a fourth inclined surface 421a, such as Figure 6 As shown, a cam surface and the aforementioned cam element 620 can also be provided on the side of the fourth rocker arm 402 away from its third inclined surface 411a. That is, the two cam elements 620 are respectively located on the side of the two third inclined surfaces 411a away from the corresponding fourth inclined surface 421a.

[0109] Meanwhile, by fixing the two cams 620 that cooperate with the third swing arm 401 and the fourth swing arm 402 respectively in the aforementioned axial direction, both cams 620 can elastically cooperate with the same elastic element 610. Thus, during the switching between the unfolded and folded states of the hinge mechanism, whether the third swing arm 401 or the fourth swing arm 402 is the active driving element, it can directly drive the corresponding cam 620 to move axially and compress the elastic element 610 while being driven to rotate relative to the base 100. This reduces the difficulty of driving the cam 620 and significantly reduces the probability of jamming between the cam 620 and the elastic element 610, as well as the driven elements in the third swing arm 401 and the fourth swing arm 402, thereby improving the reliability and smoothness of the hinge mechanism.

[0110] With cam members 620 provided on the side of the third swing arm 401 and the fourth swing arm 402 away from their third inclined plane 411a, in order to further improve the reliability of the hinge mechanism, each cam member 620 can be provided with an elastic member 610 on the side away from the first synchronous mating member 501. Thus, regardless of whether the third swing arm 401 or the fourth swing arm 402 is the active driving member, the cam member 620 can drive the elastic member 610 distributed along the axial direction to be squeezed, so that the force is transmitted linearly, further preventing jamming during the operation of the hinge mechanism.

[0111] Optionally, by forming the two cam components 620 located on the same side of the third rocker arm 401 and the fourth rocker arm 402 as a single piece, it can be ensured that the two cam components 620 have the ability to be relatively fixed in the axial direction, and the processing and assembly difficulty of the hinge mechanism can be reduced. Of course, after the two cam components 620 are formed separately, they can also be bonded or otherwise made to form a relatively fixed relationship in the axial direction.

[0112] As described above, during the use of the hinge mechanism, the third swing arm 401 and the fourth swing arm 402 can be directly or indirectly connected to the first housing and the second housing of the electronic device, respectively. Based on this, neither the third swing arm 401 nor the fourth swing arm 402 can move axially relative to the base 100. Thus, during the rotation of the third swing arm 401 and the fourth swing arm 402 relative to the base 100, the cam member 620 that cooperates with them will move axially relative to the base 100. That is, the cam member 620 has the ability to move axially relative to the base 100. Furthermore, in order to improve the stability of the cooperation between the cam member 620 and the base 100, a limiting groove or other mounting structure can be provided on the base 100 for the cam member 620.

[0113] In another embodiment of this application, such as Figure 6 As shown, the hinge mechanism may further include a synchronous shaft 630, and both the third swing arm 401 and the fourth swing arm 402 may be equipped with a synchronous shaft 630, thereby enabling both the third swing arm 401 and the fourth swing arm 402 to form a relatively reliable rotational engagement with the base 100 through the corresponding synchronous shaft 630. Furthermore, two cam members 620 located on the side of the third swing arm 401 and the fourth swing arm 402 opposite to their respective third inclined plane 411a may be respectively fitted onto the two synchronous shafts 630, thereby improving the reliability of the engagement between each cam member 620 and the synchronous shaft 630.

[0114] Meanwhile, with the synchronous shaft 630 provided, as mentioned above, the elastic element 610 can specifically be a compression spring. Therefore, the elastic element 610 can be sleeved outside the synchronous shaft 630. And when both the third swing arm 401 and the fourth swing arm 402 are equipped with elastic elements 610, the elastic element 610 can be sleeved outside each synchronous shaft 630 to ensure that the working stability of each elastic element 610 is relatively high.

[0115] As described above, cam surfaces and cam elements 620 can be provided on the side of the third swing arm 401 and the fourth swing arm 402 that are away from their third inclined surface 411a, and the hinge mechanism can be hovered by the elastic element 610. In order to improve the reliability of the hovering state of the hinge mechanism, in another embodiment of this application, cam elements 620 are provided on both sides of the third swing arm 401 and the fourth swing arm 402 in the aforementioned rotation axis. So that when the third swing arm 401 and the fourth swing arm 402 rotate relative to the base 100, the cam elements 620 located on their respective sides can be driven to move away from each other. This can further increase the damping force of the hinge mechanism, thereby improving the stability of the hinge mechanism when it is in the hovering state.

[0116] In the above embodiments, the elastic element 610 can be disposed at the end of the second arm 420 of the third swing arm 401 that is away from the first arm 410. Based on this, in order to ensure that the end of the first arm 410 of the third swing arm 401 that is away from its second arm 420 can also provide corresponding damping force when it cooperates with the corresponding cam element 620, in a specific embodiment of this application, another or more elastic elements 610 can be further disposed on the side of the first arm 410 of the third swing arm 401 that is away from its second arm 420.

[0117] To reduce the number of components in the hinge mechanism and improve its reliability, in another embodiment of this application, such as... Figure 6 , and combined Figure 4 As shown, one or more elastic elements 610 can be arranged side by side in a direction perpendicular to the rotation axis only on the side of the second arm 420 of the third swing arm 401 away from its first arm 410. At the same time, by making each synchronous shaft 630 move and engage with the base 100 in the rotation axis, it can also be ensured that the cam element 620 located on the side of the third swing arm 401 away from its third inclined surface 411a (i.e., the side of the first arm 410 away from the second arm 420) can engage with the cam surface of the first arm 410 and produce a damping effect. This can also reduce the size of the hinge mechanism in the rotation axis.

[0118] More specifically, the embodiments of this application also include a retaining ring 660, and by providing a limiting groove on the synchronous shaft 630, the retaining ring 660 is held in the limiting groove, so that the retaining ring 660 can form an axial limiting relationship with the synchronous shaft 630, thereby providing an axial limiting function for devices such as the elastic element 610 and the cam element 620. Furthermore, in the axial direction of the hinge mechanism, the retaining ring 660 can be used to make the cam 620 located on the side of the third rocker arm 401 away from its third inclined surface 411a and the synchronous shaft 630 relatively fixed. This allows the third rocker arm 401 to drive the cam 620 located on the side of its third inclined surface 411a away from itself to move away from the third rocker arm 401 during the rotation of the third rocker arm 401 relative to the base 100. During the axial movement of the cam 620, it can drive the end of the synchronous shaft 630 fixed to it to move relative to the base 100 towards the third rocker arm 401, thereby causing the synchronous shaft 630 to compress the elastic element 610.

[0119] Meanwhile, during the rotation of the third swing arm 401 relative to the base 100, it can also drive the fourth swing arm 402 to rotate relative to the base 100 through the first synchronous engagement member 501 and the second synchronous engagement member 502. During the rotation of the fourth swing arm 402, the cam member 620 located on the side of the fourth swing arm 402 away from its fourth inclined surface 421a can also be driven by the fourth swing arm 402 and move axially away from the fourth swing arm 402. During the movement of the cam member 620, the elastic member 610 can be further squeezed, so that the opposite ends of the elastic member 610 are further brought closer to each other, increasing the elastic force of the elastic member 610, thereby improving the damping effect of the hinge mechanism, improving the suspension stability of the hinge mechanism, and making the axial dimension of the entire hinge mechanism relatively small.

[0120] In addition, in this embodiment, since each synchronous shaft 630 has the ability to move relative to the base 100 along the axial direction, bushings 651 distributed along the axial direction can be provided on the base 100, and each synchronous shaft 630 is inserted between at least two bushings 651 to provide limiting and guiding functions for the synchronous shaft 630, thereby improving the stability of the fit between the synchronous shaft 630 and the base 100.

[0121] In another embodiment of this application, simultaneously, as Figure 6 As shown, the hinge mechanism may further include multiple fixed supports 650 spaced apart along the rotation axis. The fixed supports 650 are fixedly mounted on the base 100 using detachable connectors such as screws, and adjacent fixed supports 650 are spaced apart axially. The fixed supports 650 may be provided with the aforementioned bushings 651, resulting in relatively high stability of the fit between each synchronous shaft 630 and the base 100. Furthermore, in the case of the embodiment of this application, the base 100 is also provided with the prerequisite of being formed by integral molding, thereby preventing the base 100 from failing to demold properly due to the need for the aforementioned non-detachable bushings 651 on the base 100.

[0122] Furthermore, when adopting the above technical solution, the bushing 651 can also provide a limiting function for the first arm 410 and the second arm 420 of the third swing arm 401. Specifically, since both the synchronous shaft 630 and the third swing arm 401 have a rotational fit with the base 100, the synchronous shaft 630 can be simultaneously inserted into both the bushing 651 and the third swing arm 401. By providing notches 401a on both the first arm 410 and the second arm 420 of the third swing arm 401 to accommodate the bushing 651 respectively, the first arm 410 and the second arm 420 can form a limiting fit with the corresponding bushing 651 in the rotational axis, further improving the assembly stability of the third swing arm 401 and the base 100 in the rotational axis. Of course, if the fourth swing arm 402 also includes the aforementioned first arm 410 and second arm 420, the fourth swing arm 402 can also be provided with the aforementioned fixed bracket 650 and bushing 651.

[0123] Of course, in other embodiments of this application, the base 100 can also be formed by split molding. Specifically, the base 100 includes a base body 110 and a cover 120. The base body 110 is provided with an arc-shaped first sliding groove 111, and the cover 120 can be detachably fixedly connected to the base body 110 through a threaded connector 130. This can reduce the overall processing difficulty of the base 100. Of course, in order to support devices such as displays, clearance holes can also be provided on the cover 120 so that the end of the first slider 201 away from the second slider 202 can extend out of the base 100 through the clearance holes. Furthermore, in order to reduce the overall thickness of the base 100, during the process of forming the threaded hole on the base 110, the threaded hole can occupy part of the space where the first slide groove 111 is located and form a solid structure. In this case, in order to avoid the aforementioned solid structure, the end of the first slider 201 can be provided with an avoidance opening, thereby using the avoidance opening to avoid the aforementioned solid structure. This also enables the first slider 201 to form a limiting relationship with the aforementioned solid structure along the rotation axis of the hinge mechanism, thereby further improving the reliability of the cooperation between the first swing arm 210 and the first bracket 310.

[0124] In the hinge mechanism disclosed in the embodiments of this application, it may include only a first swing arm 210, a second swing arm 220, a third swing arm 401, and a fourth swing arm 402, and correspondingly, a first synchronous engagement member 501 and a second synchronous engagement member 502, etc. In another embodiment of this application, a hinge assembly may be composed of a first swing arm 210, a second swing arm 220, a third swing arm 401, a fourth swing arm 402, a first synchronous engagement member 501, and a second synchronous engagement member 502, and the hinge mechanism may include multiple hinge assemblies spaced apart along its own axial direction. Under the action of multiple hinge assemblies, the connection reliability and folding smoothness between the hinge mechanism and the first and second housings of the electronic device can be improved, and the torsional deformation of the flexible screen 900 during folding and unfolding can also be prevented. More specifically, the base 100 may include a seat body 110 and multiple pressure covers 120, with each pressure cover 120 corresponding to a multiple hinge assembly.

[0125] In another embodiment of this application, a middle plate 730 may be provided between any two adjacent hinge components. Similar to the first door panel 710 and the second door panel 720 mentioned in the above embodiments, the middle plate 730 can also provide support for the flexible screen 900, thereby further improving the support effect of the flexible screen 900. Simultaneously, the middle plate 730 is connected to the hinge components on its adjacent sides by welding to further improve the reliability and stability of the connection between multiple hinge components. It should be noted that the spacing between any two adjacent hinge components can be the same or different, and this is not limited herein.

[0126] Based on the hinge mechanism disclosed in any of the above embodiments of this application, this application also discloses an electronic device that includes any of the aforementioned hinge mechanisms. Of course, the electronic device may also include a flexible screen 900, a first housing and a second housing, and a battery, etc., wherein the first housing and the second housing are connected by a hinge mechanism and together provide support for the flexible screen 900, and the battery is used to power the electrical components in the electronic device. In addition, the electronic device may also include other electronic components such as a camera module; for the sake of brevity, they will not be described in detail here.

[0127] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A hinge mechanism, characterized in that, It includes a base, a first swing arm, a first bracket, a third swing arm, a fourth swing arm, a first synchronous mating component, a second synchronous mating component, an elastic component, and a cam component, wherein, The base is provided with an arc-shaped first sliding groove, and the first end of the first swing arm is provided with an arc-shaped first slider. The first slider is rotatably connected to the first sliding groove. The second end of the first swing arm and one of the first bracket are provided with a second slider and the other is provided with a second sliding groove. During the rotation of the first bracket relative to the base, the second slider and the second sliding groove slide relative to each other along the thickness direction of the first bracket. The third swing arm and the first swing arm are both disposed on the same side of the base. The third swing arm includes a first arm body and a second arm body. The first arm body and the second arm body are spaced apart along the rotation axis of the first swing arm. The first arm body and the second arm body are both rotatably connected to the base, and the first arm body and the second arm body are both slidably engaged with the first bracket in a direction perpendicular to the rotation axis. The first and second synchronous coupling components are linked and both are movably mounted on the base. The first and second arm bodies are both driven by the first synchronous coupling component. The fourth swing arm is driven by the second synchronous coupling component, so that the third and fourth swing arms can rotate in opposite directions relative to the base. The cam is slidably mounted on the base along the rotation axis, and the cam and the base are fixed relative to each other in the direction around the rotation axis. The cam is provided on the end face of the second arm away from the first arm, and the second arm and the cam are engaged. In the rotation axis, one end of the elastic member abuts against the side of the cam away from its cam surface, and the other end of the elastic member is fixed relative to the base.

2. The hinge mechanism according to claim 1, characterized in that, The hinge mechanism includes a second swing arm and a second support. The second swing arm and the first swing arm are disposed on opposite sides of the base. There are multiple first sliding grooves. The first end of the second swing arm is provided with an arc-shaped first slider. Multiple first sliders are rotatably connected to multiple first sliding grooves in a one-to-one correspondence. The second end of the second swing arm and one of the second brackets are provided with a second slider, and the other of the second swing arm and the second bracket are provided with a second sliding groove. During the rotation of the second bracket relative to the base, the second slider of the second swing arm and the second sliding groove of the second bracket slide relative to each other along the thickness direction of the second bracket.

3. The hinge mechanism according to claim 2, characterized in that, The first bracket is provided with the second sliding groove, and the angle between the extension direction of the second sliding groove and the thickness direction of the first bracket is α, 0° < α < 90°. When the first bracket and the second bracket are facing each other, the first bracket and the second bracket are clamped to form a screen receiving space. The distance between the end of the second sliding groove near the second bracket and the base is greater than the distance between the end of the second sliding groove away from the second bracket and the base.

4. The hinge mechanism according to claim 1, characterized in that, The first and second synchronous fitting components are fixed relative to each other along the rotation axis, and are slidably connected to the base. The first synchronous mating component has a first inclined surface, the second synchronous mating component has a second inclined surface, the third swing arm has a third inclined surface, and the fourth swing arm has a fourth inclined surface; the third inclined surface is opposite to and mating with the first inclined surface, and the fourth inclined surface is opposite to and mating with the second inclined surface; When the third swing arm rotates relative to the base, the third inclined surface pushes against the first inclined surface to drive the first and second synchronous engaging components to move relative to the base along the rotation axis, and the second inclined surface pushes against the fourth inclined surface to drive the fourth swing arm to rotate relative to the base in a direction opposite to the rotation direction of the third swing arm. When the fourth swing arm rotates relative to the base, the fourth inclined surface pushes against the second inclined surface to drive the first and second synchronous mating components to move relative to the base along the rotation axis, and the first inclined surface pushes against the third inclined surface to drive the third swing arm to rotate relative to the base in a direction opposite to the rotation direction of the fourth swing arm.

5. The hinge mechanism according to claim 4, characterized in that, In the third swing arm, the first arm body is provided with the third inclined surface, the end of the second arm body opposite to the first arm body is engaged with the cam of the cam component, and the second arm body is also provided with the fourth inclined surface; The fourth swing arm is further provided with the third inclined surface, the first synchronous cooperating component is further provided with the second inclined surface, and the second synchronous cooperating component is further provided with the first inclined surface; in the rotation axis, the first synchronous cooperating component is sandwiched between the third inclined surface and the fourth inclined surface of the third swing arm, and the second synchronous cooperating component is sandwiched between the third inclined surface and the fourth inclined surface of the fourth swing arm.

6. The hinge mechanism according to claim 5, characterized in that, The fourth swing arm is provided with the cam surface and the cam element on the side opposite to its third inclined surface, and the two cam elements that cooperate with the third swing arm and the fourth swing arm respectively are fixed relative to each other in the axial direction; The third and fourth swing arms are rotatably mounted on the base via synchronous shafts, and each synchronous shaft is fitted with an elastic element. One end of each elastic element is fixed relative to the synchronous shaft, and the other end of each elastic element abuts against the two cam elements respectively.

7. The hinge mechanism according to claim 4, characterized in that, The third swing arm is rotatably mounted on the base via a synchronous shaft. The synchronous shaft and the base are movably engaged in the direction of rotation and are also engaged in the direction perpendicular to the direction of rotation. The third swing arm is provided with cam components on both sides of the rotation axis. Each cam component is fixed relative to the synchronous shaft on the rotation axis. The end of the first arm body away from the second arm body and the end of the second arm body away from the first arm body are cam-fitted with the two cam components in a one-to-one correspondence.

8. The hinge mechanism according to claim 4, characterized in that, The third swing arm is rotatably mounted on the base via a synchronous shaft. The hinge mechanism includes a fixed bracket, which is fixedly mounted on the base. The fixed bracket is provided with a bushing, and the synchronous shaft passes through the bushing. The first and second arms of the third swing arm are both equipped with the bushing, and in the rotation axis, the first and second arms are both limited by the bushing.

9. The hinge mechanism according to claim 4, characterized in that, The first inclined surface includes a first helical driving surface, a second helical driving surface, a first cut-off end face, and a second cut-off end face. Along the direction surrounding the rotation axis, the first helical driving surface, the first cut-off end face, the second helical driving surface, and the second cut-off end face are connected in sequence, and the second cut-off end face is connected to the first helical driving surface. The first cut-off end face and the second cut-off end face are parallel to each other and both are perpendicular to the rotation axis.

10. An electronic device, characterized in that, Includes the hinge mechanism as described in any one of claims 1-9.

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