Hinge mechanism and electronic device

Abstract

The application discloses a hinge mechanism and electronic equipment, and belongs to the technical field of communication equipment. The hinge mechanism comprises a base, a main swing arm, a synchronous swing arm and an elastic limiting piece. The main swing arm comprises a first swing arm body and a connecting part. The connecting part is arranged on the first swing arm body. The first swing arm body is rotatably arranged on the base. The connecting part is provided with a strip-shaped hole. The synchronous swing arm comprises a second swing arm body and a synchronous shaft. The synchronous shaft has a connecting end and a free end. The connecting end is connected with the second swing arm body. The free end and the connecting end are respectively located on two sides of the strip-shaped hole. The synchronous shaft can move along the extension direction of the strip-shaped hole. The elastic limiting piece is sleeved on the synchronous shaft. One end of the elastic limiting piece is connected with the free end. The other end of the elastic limiting piece abuts against the connecting part.

Description

Technical Field

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

[0002] With the development of flexible display technology, foldable electronic devices are becoming increasingly popular. A foldable electronic device includes a first device body, a second device body, and a hinge mechanism, with the first and second device bodies hinged together. The hinge mechanism includes a base, a main swing arm, and a synchronous swing arm. When the main swing arm rotates, it drives the synchronous swing arm to move, thereby achieving synchronous rotation of the first and second device bodies.

[0003] However, in related technologies, since the synchronous swing arm and the main swing arm are connected by a shaft and a sliding groove, during the folding and unfolding process of the electronic device, the main swing arm and the synchronous swing arm will rub and shake along the axis of the synchronous shaft, which will cause the hinge mechanism to rub and shake as a whole, resulting in poor connection stability between the two main bodies of the electronic device. Summary of the Invention

[0004] The purpose of this application is to provide a hinge mechanism and electronic device that can solve the problems of rubbing and shaking in the hinge mechanism.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] In a first aspect, embodiments of this application provide a hinge mechanism, including:

[0007] Base;

[0008] The main swing arm includes a first swing arm body and a connecting part. The connecting part is disposed on the first swing arm body, and the first swing arm body is rotatably disposed on the base. The connecting part has a strip-shaped hole.

[0009] A synchronous swing arm, comprising a second swing arm body and a synchronous shaft, the synchronous shaft having a connecting end and a free end, the connecting end being connected to the second swing arm body, the free end and the connecting end being located on both sides of the strip hole, and the synchronous shaft being movable along the extension direction of the strip hole;

[0010] An elastic limiting member is sleeved on the synchronous shaft, one end of the elastic limiting member is connected to the free end, and the other end of the elastic limiting member abuts against the connecting part.

[0011] Secondly, embodiments of this application provide an electronic device, including a first device body, a second device body, and the aforementioned hinge mechanism, wherein the first device body and the second device body are rotatably connected via the hinge mechanism;

[0012] The number of main swing arms is at least two, including a first main swing arm and a second main swing arm. The number of synchronous swing arms is at least two, including a first synchronous swing arm and a second synchronous swing arm. The first synchronous swing arm cooperates with the first main swing arm, and the second synchronous swing arm cooperates with the second main swing arm. The first synchronous swing arm and the second synchronous swing arm are connected by a transmission. The first swing arm body of the first main swing arm is connected to the first equipment body, and the first swing arm body of the second main swing arm is connected to the second equipment body.

[0013] In this embodiment, the connecting part of the main swing arm has a strip-shaped hole, through which the free end of the synchronous shaft of the synchronous swing arm passes. An elastic limiting member is sleeved on the synchronous shaft, with one end connected to the free end and the other end abutting against the connecting part. At this time, the elastic limiting member limits both the connecting part and the free end along the axial direction of the synchronous shaft. Therefore, the elastic limiting member can limit the synchronous shaft along the axial direction of the synchronous shaft, thereby preventing the synchronous shaft from rubbing or shaking relative to the connecting part, thus preventing the hinge mechanism from rubbing or shaking as a whole, and improving the connection stability of the two main body parts of the electronic device. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the hinge mechanism disclosed in the embodiments of this application;

[0015] Figure 2 This is an exploded view of the hinge mechanism disclosed in the first embodiment of this application;

[0016] Figure 3 This is a partial cross-sectional view of the hinge mechanism disclosed in the first embodiment of this application;

[0017] Figure 4 This is a schematic diagram of the elastic limiting member of the hinge mechanism disclosed in the embodiments of this application;

[0018] Figure 5 This is a front view of the elastic limiting member of the hinge mechanism disclosed in the embodiments of this application;

[0019] Figure 6 This is a side view of the elastic limiting member of the hinge mechanism disclosed in the embodiments of this application;

[0020] Figure 7 This is an exploded view of the elastic limiting member of the hinge mechanism disclosed in the embodiments of this application;

[0021] Figure 8 and Figure 9 This is a partial structural schematic diagram of the hinge mechanism disclosed in the first embodiment of this application;

[0022] Figure 10 This is a partial cross-sectional view of a portion of the structure of the hinge mechanism disclosed in the first embodiment of this application;

[0023] Figure 11 This is an exploded view of the hinge mechanism disclosed in the second embodiment of this application;

[0024] Figure 12 This is a partial cross-sectional view of the hinge mechanism disclosed in the second embodiment of this application;

[0025] Figures 13 to 15 This is a partial structural schematic diagram of the hinge mechanism disclosed in the second embodiment of this application.

[0026] Explanation of reference numerals in the attached figures:

[0027] 100-Base, 200-Main swing arm, 210-First swing arm body, 220-Connecting part, 221-Strip hole, 2211-Toothed surface, 300-Synchronous swing arm, 310-Second swing arm body, 320-Synchronous shaft, 321-Annular groove, 322-Avoidance groove, 323-Blocking part, 400-Elastic limiting component, 410-First support plate, 411-First notch, 412-Protrusion, 420-Second support plate, 421-Second notch, 430-Elastic component, 431-Third notch, 510-Matching gear, 520-Elastic deformation component, 521-Spring, 522-Abutting protrusion, 600-Gear transmission component, 610-First gear, 620-Second gear, 710-Fixed bracket, 720-Modible bracket, 730-Spring, 740-Guide rod. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] 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.

[0030] The hinge mechanism and electronic device provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0031] refer to Figures 1 to 15 This application discloses a hinge mechanism for achieving synchronous rotation of two main body components of an electronic device. The disclosed hinge mechanism includes a base 100, a main swing arm 200, a synchronous swing arm 300, and an elastic limiting member 400.

[0032] The base 100 provides a mounting base for the other components of the hinge mechanism. The main swing arm 200 includes a first swing arm body 210 and a connecting portion 220. The connecting portion 220 is disposed on the first swing arm body 210, and the first swing arm body 210 is rotatably mounted on the base 100. The connecting portion 220 has a slotted hole 221. The slotted hole 221 can be a straight structure or an arc structure. This slotted hole 221 is used to cooperate with the synchronous swing arm 300, so the extension direction of the slotted hole 221 needs to match the movement trajectory of the synchronous swing arm 300.

[0033] The synchronous swing arm 300 includes a second swing arm body 310 and a synchronous shaft 320. The synchronous shaft 320 has a connecting end and a free end. The connecting end is connected to the second swing arm body 310, and the free end and the connecting end are located on opposite sides of the slotted hole 221. The free end passes through the slotted hole 221, thus partially positioning the synchronous shaft 320 within it. The synchronous shaft 320 can move along the extending direction of the slotted hole 221. When the main swing arm 200 moves, the synchronous shaft 320 undergoes frictional transmission with the inner wall of the slotted hole 221, allowing it to move along the extending direction of the slotted hole 221. This also enables the synchronous swing arm 300 to move together with the main swing arm 200.

[0034] In the specific structure, there are at least two main swing arms 200, including a first main swing arm and a second main swing arm. There are at least two synchronous swing arms 300, including a first synchronous swing arm and a second synchronous swing arm. The first synchronous swing arm cooperates with the first main swing arm. The second synchronous swing arm cooperates with the second main swing arm. The first synchronous swing arm and the second synchronous swing arm are connected by a transmission. The first swing arm body 210 of the first main swing arm is connected to the first equipment body. The first swing arm body 210 of the second main swing arm is connected to the second equipment body.

[0035] When the electronic device is unfolded, the user applies force to the first device body, which drives the first main swing arm 200 to rotate. During the rotation of the first main swing arm 200, the first synchronous swing arm moves. The first synchronous swing arm is connected to the second synchronous swing arm, so the first and second synchronous swing arms rotate at the same angle. The second synchronous swing arm drives the second main swing arm to move, and the second main swing arm drives the second device body to rotate synchronously. Therefore, the synchronous rotation of the first and second device bodies can be achieved.

[0036] Similarly, when the electronic device is folded, the first device body and the second device body also rotate synchronously through the hinge mechanism.

[0037] The hinge mechanism disclosed in this application further includes an elastic limiting member 400, which is sleeved on the synchronous shaft 320. One end of the elastic limiting member 400 is connected to the free end, and the other end of the elastic limiting member 400 abuts against the connecting portion 220. At this time, the elastic limiting member 400 is located between the free end and the connecting portion 220, and the elastic limiting member 400 can limit the connecting portion 220 and the free end along the axial direction of the synchronous shaft 320.

[0038] In the embodiments disclosed in this application, the elastic limiting member 400 limits the connecting portion 220 and the free end along the axial direction of the synchronous shaft 320. Therefore, the elastic limiting member 400 can limit the synchronous shaft 320 along the axial direction of the synchronous shaft 320, thereby preventing the synchronous shaft 320 from rubbing and shaking relative to the connecting portion 220. This prevents the hinge mechanism from rubbing and shaking as a whole, thereby improving the connection stability of the two main bodies of the electronic device.

[0039] In addition, the elastic limiting member 400 is sleeved on the synchronous shaft 320. Therefore, the end of the elastic limiting member 400 facing the connecting part 220 needs to abut against the connecting part 220. This increases the friction between the synchronous swing arm 300 and the main swing arm 200, thereby further improving the synchronous movement of the synchronous swing arm 300 and the main swing arm 200. This makes the rotation angles of the first device body and the second device body more consistent when unfolded and folded, thus further improving the appearance consistency of the electronic device and further improving the customer experience.

[0040] In addition, the elastic limiting member 400 has a certain degree of elasticity, so the elastic limiting member 400 can buffer the force on the main swing arm 200 and the synchronous swing arm 300, thereby avoiding damage to the main swing arm 200 and the synchronous swing arm 300 due to large forces, thus further improving the safety and reliability of the hinge mechanism.

[0041] In addition, the elastic structural components can absorb the dimensional tolerances of each part, so that the main swing arm 200 and the synchronous swing arm 300 are always in a taut state, thus further preventing the hinge mechanism from rubbing and shaking.

[0042] Optionally, the elastic structural component can be a helical spring, a ring-shaped spring, or other elastic structures, which are not limited in this article.

[0043] In the above embodiments, one end of the elastic limiting member 400 can be welded to the free end. Of course, the connection between the elastic limiting member 400 and the free end is not limited to welding. In another optional embodiment, the free end can be provided with a blocking part 323, and one end of the elastic limiting member 400 can abut against the blocking part 323. In this case, the blocking part 323 can protrude from the side surface of the synchronous shaft 320, thereby abutting against the elastic limiting member 400, facilitating the assembly of the elastic limiting member 400 and the synchronous shaft.

[0044] In another optional embodiment, the elastic limiting member 400 may include a first support plate 410, a second support plate 420, and an elastic member 430. The first support plate 410 and the second support plate 420 can be elastically connected by the elastic member 430. The first support plate 410 abuts against the free end, and the second support plate 420 abuts against the connecting portion 220. In this solution, the elastic member 430 is disposed between the first support plate 410 and the second support plate 420, and the first and second support plates 410 and 420 can provide protection for the elastic member 430. Therefore, the above solution can further improve the safety and reliability of the elastic limiting member 400.

[0045] In the above embodiments, excessive friction between the first support plate 410 and the connecting portion 220 can easily affect the smoothness of rotation and sliding of the synchronous swing arm 300 and the main swing arm 200. Therefore, in another optional embodiment, the first support plate 410 can be provided with multiple spaced protrusions 412 on the side facing the connecting portion 220, allowing the first support plate 410 to abut against the connecting portion 220. In this solution, the surface of the first support plate 410 is provided with multiple protrusions 412, which reduces the friction between the main swing arm 200 and the elastic limiting member 400 when in contact with the main swing arm 200, thereby making the rotation and sliding of the main swing arm 200 and the synchronous swing arm 300 smoother and further improving the user experience.

[0046] The aforementioned protrusion 412 can be a dot-like structure, a boss-like structure, or other structures, which are not limited in this article.

[0047] In the above embodiments, the first support plate 410, the elastic element 430 and the second support plate 420 can be laser welded together. Of course, the first support plate 410, the elastic element 430 and the second support plate 420 can also be connected in other ways, which are not limited herein.

[0048] Optionally, the first support plate 410, the second support plate 420, and the elastic element 430 may each have corresponding mounting holes. For example, the first support plate 410 may have a first mounting hole, the second support plate 420 may have a second mounting hole, and the elastic element 430 may have a third mounting hole. The first support plate 410, the second support plate 420, and the elastic element 430 are fitted onto the synchronous shaft 320 through the corresponding mounting holes.

[0049] In the above embodiment, the elastic limiting member 400 needs to be fitted onto the synchronous shaft 320 from its free end. Since the free end also needs to limit the elastic limiting member 400, its outer diameter needs to be smaller than the outer diameter of the mounting hole. After the elastic limiting member 400 is fitted onto the synchronous shaft 320, the aforementioned blocking part 323 also needs to be installed on the free end to limit the elastic limiting member 400. This assembly method is quite difficult.

[0050] Based on this, in another optional embodiment, notches can be provided on the first support plate 410, the second support plate 420, and the elastic member 430. The synchronous shaft 320 is provided with an annular groove 321. The elastic limiting member 400 can be engaged with the annular groove 321 through the notches. In this solution, the elastic limiting member 400 is engaged in the annular groove 321 through the corresponding notches on the first support plate 410, the second support plate 420, and the elastic member 430, thus making the assembly of the elastic limiting member 400 and the synchronous shaft 320 easier.

[0051] In this design, the sidewall of the annular groove 321 near the free end can serve as the blocking part 323 mentioned above.

[0052] In the above embodiments, the first support plate 410, the second support plate 420, and the elastic element 430 can all be fan-shaped structures with notches. Of course, the first support plate 410, the second support plate 420, and the elastic element 430 can also be other structures, which are not limited herein.

[0053] Specifically, a first notch 411 may be provided on the first support plate 410, a second notch 421 may be provided on the second support plate 420, and a third notch 431 may be provided on the elastic member 430.

[0054] In the above embodiments, slippage easily occurs between the synchronous shaft 320 and the inner wall of the strip hole 221, causing the synchronous swing arm 300 and the main swing arm 200 to move asynchronously, resulting in asynchronous rotation of the two halves of the device body. For example, when the entire device is opened to 90°, ideally, the first and second device bodies can each open 45°. When the movements of the synchronous swing arm 300 and the main swing arm 200 are not completely synchronized, the first and second device bodies do not each open 45°, thus the opening angle of the entire device does not reach the preset angle, resulting in poor appearance performance of the electronic device.

[0055] Based on this, in another optional embodiment, the hinge mechanism may further include a mating member, which may be disposed on the synchronous shaft 320 and may contact the wall of the slot 221. In this solution, the mating member can increase the contact area between the synchronous shaft 320 and the wall of the slot 221, thereby increasing the friction between the synchronous swing arm 300 and the main swing arm 200, thus enabling the synchronous swing arm 300 and the main swing arm 200 to have better motion synchronization, thereby improving the appearance performance of the electronic device.

[0056] In addition, with the improved rotational synchronization performance of the synchronous swing arm 300 and the main swing arm 200, the torque output of the entire hinge mechanism can be more stable and more in line with the design value, thereby achieving a better hovering experience and further improving the user experience.

[0057] In another alternative embodiment, the mating component can be a mating gear 510, which can be sleeved on the synchronous shaft 320. The wall of the slot 221 can be provided with a toothed surface 2211. The mating gear 510 can mesh with the toothed surface 2211.

[0058] In this scheme, a new mating gear 510 is added to the synchronous shaft 320, and a toothed surface 2211 is added to the wall of the slot 221 of the main swing arm 200. The synchronous swing arm 300 and the main swing arm 200 form a gear meshing structure, thereby changing the contact between the synchronous swing arm 300 and the main swing arm 200 from the original point contact to surface contact. This allows the main swing arm 200 to better drive the synchronous swing arm 300 to rotate, further improving the problem of asynchronous rotation of the whole machine and further improving the appearance performance of the electronic equipment.

[0059] In another alternative embodiment, the mating component can be an elastic deformable component 520. In this solution, an elastic deformable component 520 is added to the synchronous shaft 320. The synchronous shaft 320 and the inner wall of the strip hole 221 are interference-fitted through the elastic deformable component 520. Therefore, the synchronous swing arm 300 and the main swing arm 200 can always maintain a tight fit, thereby improving the problem of asynchronous rotation of the whole machine and further improving the shape performance of the electronic device.

[0060] Optionally, the interference between the elastic deformable member 520 and one side of the hole wall of the strip hole can be 0.03mm-0.05mm, and of course, other values ​​are also possible, which are not limited in this article.

[0061] Furthermore, the elastic deformable member 520 may include a spring sheet 521 and an abutment protrusion 522. The synchronous shaft 320 may have an avoidance groove 322. At least a portion of the spring sheet 521 may cover the avoidance groove 322. The abutment protrusion 522 is disposed on the side of the spring sheet 521 away from the avoidance groove, and the abutment protrusion 522 may be disposed opposite to the avoidance groove 322.

[0062] In this design, when the synchronous shaft 320 is inserted into the slot 221, the force exerted by the inner wall of the slot 221 on the abutment protrusion 522 causes the spring piece 521 to deform toward the relief groove 322. Therefore, the relief groove serves as a space to accommodate the compression of the spring piece 521, facilitating its deformation. Furthermore, the relief groove 322, as a space to accommodate the compression of the spring piece 521, further facilitates its deformation, thus reducing the difficulty of assembling the synchronous shaft 320 and the slot 221. Additionally, the relief groove 322, as a space to accommodate the compression of the elastically deformable part, allows for a smaller gap between the synchronous shaft 320 and the slot 221, resulting in a smaller overall size of the hinge mechanism.

[0063] In another alternative embodiment, the number of elastic deformable elements 520 can be at least two, and the at least two elastic deformable elements 520 can be located on opposite sides of the synchronous shaft 320. In this scheme, the two opposite sidewalls of the strip hole 221 can contact the opposite elastic deformable elements 520, thus achieving a better tight fit between the synchronous swing arm 300 and the main swing arm 200.

[0064] Based on the hinge mechanism disclosed in the embodiments of this application, the embodiments of this application also disclose an electronic device, which includes the hinge mechanism described in any of the embodiments above.

[0065] The electronic device disclosed in this application also includes a first device body and a second device body, which are hinged together by a hinge mechanism, allowing relative rotation between them. Both the first device body and the second device body may include, but are not limited to, components such as a housing, a display module, a circuit board, and electronic components.

[0066] Specifically, the electronic device has an unfolded state and a folded state. When the electronic device is folded, the first and second main bodies are stacked, resulting in a smaller size. When the electronic device is unfolded, the angle between the first and second main bodies increases, increasing the size of the electronic device. For example, when the electronic device is a laptop, the first main body can be a display screen, and the second main body can be a combination of a host and a keyboard. As another example, the electronic device can be a foldable screen phone. Both the first and second main bodies include a display screen and a casing. When the electronic device is folded, its size is small, and it can use only the display screen on either the first or second main body. When the electronic device is unfolded, its size increases, and the display screens of the first and second main bodies form a larger overall display screen, thus multiplying the display area of ​​the electronic device.

[0067] There are at least two main swing arms 200, including a first main swing arm and a second main swing arm. There are at least two synchronous swing arms 300, including a first synchronous swing arm and a second synchronous swing arm. The first synchronous swing arm cooperates with the first main swing arm. The second synchronous swing arm cooperates with the second main swing arm. The first and second synchronous swing arms are connected by a transmission mechanism. The first swing arm body 210 of the first main swing arm is connected to the first equipment body, and the first swing arm body 210 of the second main swing arm is connected to the second equipment body.

[0068] In this solution, when the electronic device is folded and unfolded, the first device body and the second device body can rotate synchronously through a hinge mechanism, thereby improving the user experience of the electronic device.

[0069] The hinge mechanism disclosed in this application may further include a gear transmission component 600, which is rotatably connected to the base 100. The first synchronous swing arm 300 and the second synchronous swing arm 300 can be connected through the gear transmission component 600. Specifically, the gear transmission component 600 may include a first gear 610 and a second gear 620, both of which are rotatably mounted on the base 100. The first gear 610 and the second gear 620 are identical and mesh with each other. The first gear 610 can mesh with the second swing arm body 310 of the first synchronous swing arm. The second gear 620 can mesh with the second swing arm body 310 of the second synchronous swing arm. In this case, the first synchronous swing arm can drive the second synchronous swing arm 300 to move through the first gear 610 and the second gear 620, thus realizing the synchronous rotation of the first synchronous swing arm and the second synchronous swing arm, and consequently, the synchronous rotation of the first equipment body and the second equipment body.

[0070] The hinge mechanism disclosed in this application may further include a fixed bracket 710, a movable bracket 720, a spring 730, and a guide rod 740. One end of the guide rod 740 may be connected to the base 100, and the other end of the guide rod 740 may be connected to the fixed bracket 710. The spring 730 may be fitted onto the guide rod 740, and the movable bracket 720 may also be fitted onto the guide rod 740. One end of the spring 730 may be connected to the fixed bracket 710, and the other end may be connected to the movable bracket 720. The movable bracket 720 has a first protrusion on the side facing the second swing arm body 310, and the second swing arm body 310 has a second protrusion on the side facing the movable bracket 720. During the unfolding of the electronic device, the second protrusion engages with the first protrusion to drive the movable bracket 720 to move toward the direction of the fixed bracket 710, thereby compressing the spring 730. At this time, the reaction force of the spring 730 on the movable bracket 720 can be applied to the synchronous swing arm 300, thereby making the synchronous swing arm 300 have a better hovering effect, so that the electronic device has a better hovering effect.

[0071] The electronic devices disclosed in this application can be smartphones, tablets, e-book readers, wearable devices such as smartwatches, video game consoles, etc. This application does not limit the specific types of electronic devices.

[0072] 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, include: Base; The main swing arm includes a first swing arm body and a connecting part. The connecting part is disposed on the first swing arm body, and the first swing arm body is rotatably disposed on the base. The connecting part has a strip-shaped hole. A synchronous swing arm, comprising a second swing arm body and a synchronous shaft, the synchronous shaft having a connecting end and a free end, the connecting end being connected to the second swing arm body, the free end and the connecting end being located on both sides of the strip hole, and the synchronous shaft being movable along the extension direction of the strip hole; An elastic limiting member is sleeved on the synchronous shaft, one end of the elastic limiting member is connected to the free end, and the other end of the elastic limiting member abuts against the connecting part; A mating component is disposed on the synchronous shaft and contacts the wall of the strip-shaped hole.

2. The hinge mechanism according to claim 1, characterized in that, The free end is provided with a blocking part, and one end of the elastic limiting member abuts against the blocking part.

3. The hinge mechanism according to claim 1, characterized in that, The elastic limiting member includes a first support plate, a second support plate, and an elastic member. The first support plate and the second support plate are elastically connected through the elastic member. The first support plate abuts against the free end, and the second support plate abuts against the connecting part.

4. The hinge mechanism according to claim 3, characterized in that, The first support plate, the second support plate, and the elastic member are all provided with notches, and the synchronous shaft is provided with an annular groove. The elastic limiting member can be engaged with the annular groove through the notch.

5. The hinge mechanism according to claim 3, characterized in that, The first support plate has a plurality of spaced protrusions on the side facing the connecting part, and the first support plate abuts against the connecting part through the protrusions.

6. The hinge mechanism according to claim 1, characterized in that, The mating component is a mating gear, which is sleeved on the synchronous shaft. The wall of the strip hole is provided with a toothed surface, and the mating gear meshes with the toothed surface.

7. The hinge mechanism according to claim 1, characterized in that, The mating component is an elastically deformable component, and the synchronous shaft and the inner wall of the strip hole are interference-fitted through the elastically deformable component.

8. The hinge mechanism according to claim 7, characterized in that, The elastic deformable member includes a spring sheet and abutting protrusion. The synchronous shaft has an avoidance groove. At least a portion of the spring sheet covers the avoidance groove. The abutting protrusion is disposed on the side of the spring sheet away from the avoidance groove, and the abutting protrusion is disposed opposite to the avoidance groove.

9. The hinge mechanism according to claim 7, characterized in that, The number of elastic deformation elements is at least two, and the at least two elastic deformation elements are located on opposite sides of the synchronous shaft.

10. An electronic device, characterized in that, It includes a first device body, a second device body, and a hinge mechanism as described in any one of claims 1 to 9, wherein the first device body and the second device body are rotatably connected by the hinge mechanism; The number of main swing arms is at least two, including a first main swing arm and a second main swing arm. The number of synchronous swing arms is at least two, including a first synchronous swing arm and a second synchronous swing arm. The first synchronous swing arm cooperates with the first main swing arm, and the second synchronous swing arm cooperates with the second main swing arm. The first synchronous swing arm and the second synchronous swing arm are connected by a transmission. The first swing arm body of the first main swing arm is connected to the first equipment body, and the first swing arm body of the second main swing arm is connected to the second equipment body.

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