WO2024099088A1

WO2024099088A1 - Hinge mechanism and electronic device

Info

Publication number: WO2024099088A1
Application number: PCT/CN2023/126704
Authority: WO
Inventors: 李能智; 汪耀
Original assignee: 维沃移动通信有限公司
Priority date: 2022-11-08
Filing date: 2023-10-26
Publication date: 2024-05-16
Also published as: CN115750579A

Abstract

The present application belongs to the technical field of communication devices, and discloses a hinge mechanism and an electronic device. The hinge mechanism comprises a base, a main swing arm, a synchronous swing arm and an elastic limiting member. The main swing arm comprises a first swing arm main body and a connecting portion, wherein the connecting portion is arranged on the first swing arm main body, the first swing arm main body is arranged on the base in a rotational manner, and the connecting portion is provided with a strip-shaped hole; the synchronous swing arm comprises a second swing arm main body and a synchronous shaft, wherein the synchronous shaft is provided with a connecting end and a free end, the connecting end being connected to the second swing arm main body, and the free end and the connecting end respectively being located at two sides of the strip-shaped hole, and the synchronous shaft can move in an extension direction of the strip-shaped hole; and the elastic limiting member is sleeved on the synchronous shaft, one end of the elastic limiting member being connected to the free end, and the other end of the elastic limiting member abutting against the connecting portion.

Description

Hinge mechanism and electronic equipment

cross reference

The present invention claims the priority of the Chinese patent application filed with the China Patent Office on November 8, 2022, with application number 202211392261.3 and invention name “Hinge mechanism and electronic device”. The entire contents of the application are incorporated into the present invention by reference.

Technical Field

The present application belongs to the technical field of communication equipment, and specifically relates to a hinge mechanism and an electronic device.

Background technique

With the development of flexible display technology, foldable electronic devices are becoming more and more popular. The foldable electronic device includes a first device body, a second device body and a hinge mechanism, and the first device body and the second device body are hinged by the hinge mechanism. 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 realizing the synchronous rotation of the first device body and the second device body.

However, in the related technology, since the synchronous swing arm and the main swing arm are coordinated with the axis and the slide 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 axial direction of the synchronous axis, causing the hinge mechanism to rub and shake as a whole, thereby resulting in poor connection stability between the two device bodies of the electronic device.

Summary of the invention

The purpose of the embodiments of the present application is to provide a hinge mechanism and an electronic device that can solve the problem of rubbing and shaking of the hinge mechanism.

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

In a first aspect, an embodiment of the present application provides a hinge mechanism, comprising: a base; a main swing arm, the main swing arm comprising a first swing arm body and a connecting portion, the connecting portion being arranged on the first swing arm body, the first swing arm body being rotatably arranged on the base, the connecting portion being provided with a strip Hole; a synchronous swing arm, the synchronous swing arm includes 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 to the second swing arm body, the free end and the connecting end are respectively located on both sides of the strip hole, and the synchronous shaft can move along the extension direction of the strip hole; an elastic limiter, the elastic limiter is sleeved on the synchronous shaft, one end of the elastic limiter is connected to the free end, and the other end of the elastic limiter is abutted against the connecting portion.

In the second aspect, an embodiment of the present application provides an electronic device, comprising a first device body, a second device body and the above-mentioned hinge mechanism, wherein the first device body and the second device body are rotatably connected via the hinge mechanism; the number of the main swing arms is at least two, including a first main swing arm and a second main swing arm respectively, the number of the synchronous swing arms is at least two, including a first synchronous swing arm and a second synchronous swing arm respectively, 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 is transmission-connected with the second synchronous swing arm, the first swing arm body of the first main swing arm is connected to the first device body, and the first swing arm body of the second main swing arm is connected to the second device body.

In the embodiment of the present application, a strip hole is provided at the connection part of the main swing arm, and the free end of the synchronous shaft of the synchronous swing arm passes through the strip hole. An elastic limiter is sleeved on the synchronous shaft, one end of the elastic limiter is connected to the free end, and the other end of the elastic limiter abuts against the connection part. At this time, the elastic limiter limits both the connection part and the free end along the axial direction of the synchronous shaft, so the elastic limiter can limit the synchronous shaft along the axial direction of the synchronous shaft, thereby preventing the synchronous shaft from rubbing and shaking relative to the connection part, so as to prevent the hinge mechanism from rubbing and shaking as a whole, thereby improving the connection stability of the two device bodies of the electronic device.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a hinge mechanism disclosed in an embodiment of the present application;

FIG2 is an exploded view of the hinge mechanism disclosed in the first embodiment of the present application;

FIG3 is a partial cross-sectional view of the hinge mechanism disclosed in the first embodiment of the present application;

FIG4 is a schematic structural diagram of an elastic limiting member of a hinge mechanism disclosed in an embodiment of the present application;

FIG5 is a front view of the elastic limiting member of the hinge mechanism disclosed in the embodiment of the present application;

FIG6 is a side view of the elastic limiting member of the hinge mechanism disclosed in the embodiment of the present application;

FIG7 is an exploded view of the elastic limiting member of the hinge mechanism disclosed in the embodiment of the present application;

8 and 9 are partial structural schematic diagrams of the hinge mechanism disclosed in the first embodiment of the present application;

FIG10 is a partial cross-sectional view of a portion of the structure of the hinge mechanism disclosed in the first embodiment of the present application;

FIG11 is an exploded view of the hinge mechanism disclosed in the second embodiment of the present application;

FIG12 is a partial cross-sectional view of a hinge mechanism disclosed in a second embodiment of the present application;

13 to 15 are partial structural schematic diagrams of the hinge mechanism disclosed in the second embodiment of the present application.

Description of reference numerals:
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 limiter, 410-first support plate, 411-first notch, 412-protrusion, 420-second support plate, 421-second notch, 430-elastic member, 431-third notch, 510-matching gear, 520-elastic deformation member, 521-spring sheet, 522-resting protrusion, 600-gear transmission member, 610-first gear, 620-second gear, 710-fixed bracket, 720-movable bracket, 730-spring, 740-guide rod.

Detailed ways

The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

The terms "first", "second", etc. in the specification and claims of this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type. The number of objects is not limited, for example, the first object can be one or more. In addition, in the specification and claims, "and/or" means at least one of the connected objects, and the character "/" generally means that the related objects are in an "or" relationship.

The hinge mechanism and electronic device provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in combination with the accompanying drawings.

1 to 15 , the embodiment of the present application discloses a hinge mechanism, which is used to realize the synchronous rotation of two device bodies 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 limiter 400 .

The base 100 provides a mounting base for other components of the hinge mechanism. The main swing arm 200 includes a first swing arm body 210 and a connecting portion 220, wherein the connecting portion 220 is disposed on the first swing arm body 210, and the first swing arm body 210 is rotatably disposed on the base 100. The connecting portion 220 is provided with a strip hole 221. The strip hole 221 can be a straight structure or an arc structure, and the strip hole 221 is used to match the synchronous swing arm 300, so the extension direction of the strip hole 221 needs to match the motion trajectory of the synchronous swing arm 300.

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. The free end and the connecting end are respectively located on both sides of the strip hole 221. At this time, the free end passes through the strip hole 221, so that part of the synchronous shaft 320 is located in the strip hole 221. The synchronous shaft 320 can move along the extension direction of the strip hole 221. At this time, when the main swing arm 200 moves, the synchronous shaft 320 and the inner side wall of the strip hole 221 generate friction transmission, and the synchronous shaft 320 can move along the extension direction of the strip hole 221. At the same time, the synchronous swing arm 300 can also move with the main swing arm 200.

In a specific structure, the number of main swing arms 200 is at least two, including a first main swing arm and a second main swing arm. The number of synchronous swing arms 300 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. The second synchronous swing arm cooperates with the second main swing arm. The first synchronous swing arm is connected to the second synchronous swing arm by transmission. The first swing arm body 210 of the first main swing arm is connected to the first device body. The first swing arm body 210 of the second main swing arm is connected to the second device body.

When the electronic device is unfolded, the user applies force to the first device body, and the first device body drives the first main swing arm 200 to rotate. During the rotation of the first main swing arm 200, the first synchronous swing arm is driven to move. The first synchronous swing arm is transmission-connected to the second synchronous swing arm, so the rotation angles of the first synchronous swing arm and the second synchronous swing arm are the same. 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, thereby achieving synchronous rotation of the first device body and the second device body.

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

The hinge mechanism disclosed in the present application further includes an elastic stopper 400, which is sleeved on the synchronous shaft 320. One end of the elastic stopper 400 is connected to the free end, and the other end of the elastic stopper 400 is in contact with the connecting portion 220. At this time, the elastic stopper 400 is located between the free end and the connecting portion 220, and the elastic stopper 400 can limit the connecting portion 220 and the free end along the axial direction of the synchronous shaft 320.

In the embodiment disclosed in the present application, the elastic limit member 400 limits the connecting portion 220 and the free end along the axial direction of the synchronization shaft 320. Therefore, the elastic limit member 400 can limit the synchronization shaft 320 along the axial direction of the synchronization shaft 320, thereby preventing the synchronization shaft 320 from rubbing and shaking relative to the connecting portion 220, thereby preventing the hinge mechanism from rubbing and shaking as a whole, thereby improving the connection stability of the two device bodies of the electronic device.

In addition, the elastic limit member 400 is sleeved on the synchronization shaft 320, so one end of the elastic limit member 400 facing the connecting part 220 needs to be against the connecting part 220, thereby increasing the friction between the synchronization swing arm 300 and the main swing arm 200, and further improving the synchronization movement of the synchronization swing arm 300 and the main swing arm 200, so that the rotation angles of the first device body and the second device body when unfolding and folding are further consistent, thereby further improving the appearance consistency of the electronic device and further improving the customer experience.

In addition, the elastic limiter 400 has a certain elasticity, so the elastic limiter 400 can buffer the force applied to the main swing arm 200 and the synchronous swing arm 300, thereby preventing the main swing arm 200 and the synchronous swing arm 300 from being damaged by the large force applied to them, thereby further improving the safety and reliability of the hinge mechanism.

In addition, the elastic structural member can absorb the dimensional tolerance of each component, so that the main swing arm 200 and the synchronous swing arm 300 are always in a tensioned state, thereby further preventing the hinge mechanism from rubbing and shaking.

Optionally, the elastic structural member may be a coil spring, an annular spring sheet or the like, and may also be other elastic structures which are not limited herein.

In the above embodiment, one end of the elastic stopper 400 can be welded to the free end. Of course, the connection between the elastic stopper 400 and the free end is not limited to welding. In another optional embodiment, the free end can be provided with a blocking portion 323, and one end of the elastic stopper 400 can abut against the blocking portion 323. At this time, the blocking portion 323 can protrude from the side surface of the synchronous shaft 320, thereby abutting against the elastic stopper 400, so as to facilitate the assembly of the elastic stopper 400 and the synchronous shaft.

In another optional embodiment, the elastic stopper 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 may be elastically connected through 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 support plate 410 and the second support plate 420 can protect the elastic member 430. Therefore, the above solution can further improve the safety and reliability of the elastic stopper 400.

In the above embodiment, the friction between the first support plate 410 and the connection part 220 is too large, which may easily affect the smoothness of the rotation and sliding of the synchronous swing arm 300 and the main swing arm 200. To this end, in another optional embodiment, a plurality of protrusions 412 arranged at intervals may be provided on the side of the first support plate 410 facing the connection part 220, and the first support plate 410 may abut against the connection part 220 through the protrusions 412. In this solution, a plurality of protrusions 412 are provided on the surface of the first support plate 410, so that when in contact with the main swing arm 200, the friction between the main swing arm 200 and the elastic stopper 400 can be reduced, thereby making the rotation and sliding of the main swing arm 200 and the synchronous swing arm 300 smoother, further improving the user experience.

The protrusion 412 may be a convex point structure, or a boss platform structure, or other structures, which are not limited herein.

In the above embodiment, the first support plate 410, the elastic member 430 and the second support plate 420 can be laser welded together. Of course, the first support plate 410, the elastic member 430 and the second support plate 420 can also be connected in other ways, which is not limited herein.

Optionally, the first support plate 410, the second support plate 420 and the elastic member 430 may all be provided with corresponding mounting holes. For example, the first support plate 410 may be provided with a first mounting hole, the second support plate 420 may be provided with a second mounting hole, and the elastic member 430 may be provided with a third mounting hole. The first support plate 410, the second support plate 420 and the elastic member 430 are sleeved on the synchronization shaft 320 through the corresponding mounting holes.

In the above embodiment, the elastic stopper 400 needs to be inserted into the synchronous shaft 320 from the free end. Since the free end also needs to limit the elastic stopper 400, the outer diameter of the free end needs to be smaller than the outer diameter of the mounting hole. After the elastic stopper 400 is sleeved on the synchronous shaft 320, the blocking portion 323 needs to be installed on the free end to limit the elastic stopper 400. This assembly method is relatively difficult.

Based on this, in another optional embodiment, the first support plate 410, the second support plate 420 and the elastic member 430 may be provided with notches. The synchronous shaft 320 is provided with an annular groove 321. The elastic limiting member 400 may be engaged with the annular groove 321 through the notch. 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, so that the assembly difficulty of the elastic limiting member 400 and the synchronous shaft 320 is relatively small.

In this solution, the side wall of the annular groove 321 close to the free end can serve as the blocking portion 323 mentioned above.

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

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

In the above embodiment, the synchronization shaft 320 and the inner wall of the strip hole 221 are prone to slippage, so the movement of the synchronization swing arm 300 and the main swing arm 200 is not completely synchronized, which leads to the two halves of the whole machine rotating asynchronously. For example, when the whole machine is opened to 90°, in an ideal state, the first device body and the second device body can be opened 45° each. When the movement of the synchronization swing arm 300 and the main swing arm 200 is not completely synchronized, the first device body and the second device body are not opened 45° each, which makes the whole machine rotate asynchronously. The opening angle of the machine does not reach the preset angle, thus making the appearance performance of the electronic device poor.

Based on this, in another optional embodiment, the hinge mechanism may further include a matching piece, which may be disposed on the synchronization shaft 320, and the matching piece may contact the hole wall of the strip hole 221. In this solution, the matching piece can increase the contact area between the synchronization shaft 320 and the hole wall of the strip hole 221, thereby increasing the friction between the synchronization swing arm 300 and the main swing arm 200, thereby making the synchronization swing arm 300 and the main swing arm 200 have better movement synchronization, thereby improving the appearance performance of the electronic device.

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

In another optional embodiment, the matching piece may be a matching gear 510, and the matching gear 510 may be sleeved on the synchronization shaft 320. The hole wall of the strip hole 221 may be provided with a toothed surface 2211. The matching gear 510 and the toothed surface 2211 may mesh with each other.

In this solution, a matching gear 510 is added to the synchronous shaft 320, and a toothed surface 2211 is added to the hole wall of the strip hole 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 original point contact between the synchronous swing arm 300 and the main swing arm 200 to surface contact, so that the main swing arm 200 can 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.

In another optional embodiment, the matching piece may be an elastic deformation piece 520. In this solution, an elastic deformation piece 520 is newly added to the synchronization shaft 320, and the synchronization shaft 320 and the inner wall of the strip hole 221 are interference-fitted through the elastic deformation piece 520, so that the synchronization swing arm 300 and the main swing arm 200 can always maintain a tight fit state, so as to improve the problem of asynchronous rotation of the whole machine, thereby further improving the appearance performance of the electronic device.

Optionally, the interference amount between the elastic deformation member 520 and a single side of the hole wall of the strip-shaped hole may be 0.03 mm-0.05 mm, and of course may be other values, which are not limited herein.

Furthermore, the elastic deformation member 520 may include a spring sheet 521 and abutting protrusion 522. The synchronization shaft 320 may be provided with an avoidance groove 322. At least a portion of the spring sheet 521 may cover the avoidance groove 322. The abutting protrusion 522 is disposed on a side of the spring sheet 521 away from the avoidance groove. The avoidance grooves 322 are arranged opposite to each other.

In this solution, when the synchronization shaft 320 is inserted into the strip hole 221, the force of the inner wall of the strip hole 221 against the protrusion 522 causes the spring piece 521 to deform toward the avoidance groove 322. Therefore, the avoidance groove can be used as a storage space for the spring piece 521 to be squeezed, which is convenient for the spring piece 521 to be deformed. In addition, the avoidance groove 322 is used as a storage space for the spring piece 521 to be squeezed, which is more convenient for the spring piece 521 to be deformed, so the difficulty of assembling the synchronization shaft 320 and the strip hole 221 is also relatively small. In addition, the avoidance groove 322 can be used as a storage space for the elastic deformation part to be squeezed, which also makes it possible to set the gap between the synchronization shaft 320 and the strip hole 221 smaller, thereby making the overall volume of the hinge mechanism smaller.

In another optional embodiment, the number of the elastic deformation members 520 may be at least two, and the at least two elastic deformation members 520 may be respectively located on opposite sides of the synchronous shaft 320. In this solution, the two opposite side walls of the strip hole 221 may contact the opposite elastic deformation members 520, so that the tight fit between the synchronous swing arm 300 and the main swing arm 200 can be better achieved.

Based on the hinge mechanism disclosed in the embodiments of the present application, the embodiments of the present application further disclose an electronic device, and the disclosed electronic device includes the hinge mechanism described in any of the above embodiments.

The electronic device disclosed in the present application also includes a first device body and a second device body, and the first device body and the second device body are hinged by a hinge mechanism, and the first device body and the second device body can rotate relative to each other. The first device body and the second device body can both include but are not limited to components such as a housing, a display module, a circuit board, and electronic components.

Specifically, the electronic device has an unfolded state and a folded state. When the electronic device is in the folded state, the first device body and the second device body overlap, so that the volume of the electronic device is smaller; when the electronic device is in the unfolded state, the angle between the first device body and the second device body increases, so that the volume of the electronic device increases. For example, when the electronic device is a laptop computer, the first device body may be a display screen, and the second device body may be a combination structure of a host and a keyboard. For another example, the electronic device may be a folding screen mobile phone. The first device body and the second device body both include a display screen and a shell. When the electronic device is folded, the volume of the electronic device is smaller, and the electronic device may only use the display screen on the first device body or the second device body. When the electronic device is unfolded, the volume of the electronic device increases, and the display screen of the first device body and the display screen of the second device body form a larger area. The integrated display screen increases the display area of electronic devices exponentially.

The number of the main swing arms 200 is at least two, including a first main swing arm and a second main swing arm. The number of the synchronous swing arms 300 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. The second synchronous swing arm cooperates with the second main swing arm. The first synchronous swing arm is connected to the second synchronous swing arm by transmission, the first swing arm body 210 of the first main swing arm is connected to the first device body, and the first swing arm body 210 of the second main swing arm is connected to the second device body.

In this solution, when the electronic device is folded and unfolded, the first device body and the second device body can be rotated synchronously through the hinge mechanism, thereby improving the user experience of the electronic device.

The hinge mechanism disclosed in the present application may further include a gear transmission member 600, which may be rotatably connected to the base 100, and the first synchronous swing arm 300 and the second synchronous swing arm 300 may be connected through the gear transmission member 600. Specifically, the gear transmission member 600 may include a first gear 610 and a second gear 620, which may be rotatably arranged on the base 100. The first gear 610 and the second gear 620 are identical and meshed with each other. The first gear 610 may mesh with the second swing arm body 310 of the first synchronous swing arm. The second gear 620 may mesh with the second swing arm body 310 of the second synchronous swing arm. At this time, the first synchronous swing arm may drive the second synchronous swing arm 300 to move through the first gear 610 and the second gear 620, thereby realizing the synchronous rotation of the first synchronous swing arm and the second synchronous swing arm, and then realizing the synchronous rotation of the first device body and the second device body.

The hinge mechanism disclosed in the present application may also 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 mounted on the guide rod 740, and the movable bracket 720 may also be mounted on 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 is provided with a first convex portion on one side facing the second swing arm body 310, and the second swing arm body 310 is provided with a second convex portion on one side facing the movable bracket 720. In the process of unfolding the electronic device, the second convex portion cooperates with the first convex portion to drive the movable bracket 720 to move toward the direction where the fixed bracket 710 is located, 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, so that the synchronous swing arm 300 has a better hovering effect, so that the electronic device has a better hovering effect. fruit.

The electronic device disclosed in the embodiments of the present application may be a smart phone, a tablet computer, an e-book reader, a wearable device such as a smart watch, an electronic game console, etc. The embodiments of the present application do not limit the specific type of the electronic device.

The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

A hinge mechanism, comprising:

Pedestal;

A main swing arm, the main swing arm comprising a first swing arm body and a connecting portion, the connecting portion being arranged on the first swing arm body, the first swing arm body being rotatably arranged on the base, and the connecting portion being provided with a strip-shaped hole;

A synchronous swing arm, the 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 respectively located at two sides of the strip hole, and the synchronous shaft being movable along the extending direction of the strip hole;

An elastic limiting member, wherein the 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 is in contact with the connecting portion.
The hinge mechanism according to claim 1, wherein the free end is provided with a blocking portion, and one end of the elastic limiting member abuts against the blocking portion.
The hinge mechanism according to claim 1, wherein the elastic limit member comprises a first support plate, a second support plate and an elastic member, the first support plate and the second support plate are elastically connected via the elastic member, the first support plate abuts against the free end, and the second support plate abuts against the connecting portion.
According to the hinge mechanism of claim 3, wherein the first support plate, the second support plate and the elastic member are all provided with notches, the synchronizing shaft is provided with an annular groove, and the elastic limiting member can be engaged with the annular groove through the notch.
The hinge mechanism according to claim 3, wherein a plurality of protrusions arranged at intervals are provided on a side of the first support plate facing the connecting portion, and the first support plate abuts against the connecting portion through the protrusions.
The hinge mechanism according to claim 1, wherein the hinge mechanism further comprises a mating piece, wherein the mating piece is arranged on the synchronization shaft, and the mating piece contacts the hole wall of the strip hole.
The hinge mechanism according to claim 6, wherein the mating piece is a mating gear, the mating gear is sleeved on the synchronizing shaft, the hole wall of the strip hole is provided with a toothed surface, and the mating gear is meshed with the toothed surface.
The hinge mechanism according to claim 6, wherein the mating piece is an elastic deformable piece, and the synchronizing shaft and the inner wall of the strip hole are interference fit through the elastic deformable piece.
The hinge mechanism according to claim 8, wherein the elastic deformation member includes a spring sheet and a stop protrusion, the synchronization shaft is provided with an avoidance groove, at least part of the spring sheet covers the avoidance groove, the stop protrusion is arranged on the side of the spring sheet away from the avoidance groove, and the stop protrusion is arranged opposite to the avoidance groove.
The hinge mechanism according to claim 8, wherein the number of the elastic deformation members is at least two, and the at least two elastic deformation members are respectively located on opposite sides of the synchronization axis.
An electronic device, comprising a first device body, a second device body and the hinge mechanism according to any one of claims 1 to 10, wherein the first device body and the second device body are rotatably connected via the hinge mechanism;

The number of the main swing arms is at least two, including a first main swing arm and a second main swing arm respectively. The number of the synchronous swing arms is at least two, including a first synchronous swing arm and a second synchronous swing arm respectively. 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 is transmission-connected with the second synchronous swing arm. The first swing arm body of the first main swing arm is connected with the first equipment body, and the first swing arm body of the second main swing arm is connected with the second equipment body.