CN215370587U

CN215370587U - Hinge device, hinge mechanism and mobile terminal

Info

Publication number: CN215370587U
Application number: CN202121844670.3U
Authority: CN
Inventors: 田宏帅
Original assignee: Jiangsu Gian Technology Co Ltd
Current assignee: Jiangsu Gian Technology Co Ltd
Priority date: 2021-08-09
Filing date: 2021-08-09
Publication date: 2021-12-31
Anticipated expiration: 2031-08-09

Abstract

The utility model relates to a hinge device, a hinge mechanism and a mobile terminal, wherein the hinge device is provided with a mounting base, overturning components arranged at two sides of the mounting base, a synchronous gear set used for synchronously rotating the overturning components and a damping component; the overturning assembly comprises a driving plate, a supporting plate, a first rotating plate and a second rotating plate; the lower end of the first rotating plate is rotatably connected with the mounting base and is used for driving a gear on the corresponding side of the synchronous gear set, and the upper end of the first rotating plate is in sliding compensation fit with the driving plate and the supporting plate respectively; the lower end of the second rotating plate is rotatably connected with the mounting base in a virtual shaft manner, and the upper end of the second rotating plate is rotatably connected with the supporting plate; the supporting plate is rotationally connected with the driving plate; when the hinge device is closed, the opposite support plates are formed in a state in which the upper ends are close to the lower ends. The utility model can effectively reduce the width of the mounting base, thereby reducing the widths of the hinge mechanism and the hinge mounting base on the mobile terminal and providing favorable conditions for thinning products.

Description

Hinge device, hinge mechanism and mobile terminal

Technical Field

The present invention relates to electronic device components, and in particular, to a hinge device, a hinge mechanism, and a mobile terminal.

Background

With the continuous progress and expansion of the science and technology in the field of mobile terminals and the coming of the 5G network era, people have greater and greater dependence on the mobile terminals. Nowadays, with the continuous update of various software such as chatting and video, people feel that a conventional touch screen mobile phone or tablet computer is not enough, and the main reason is that the size of a screen is limited by the volume of a mobile terminal.

In order to solve the problem, people utility model the flexible screen to on using mobile terminal with the flexible screen, through folding design, make mobile terminal can satisfy people's requirement on carrying, can enlarge mobile terminal's screen through expanding when using needs again. To achieve this above requirement, it is critical whether the design of the hinge mechanism is reasonable.

At present, different mechanical components are often required to be designed to meet the requirements in order to realize synchronous overturning, damping hand feeling and the like in a limited space by adopting a hinge mechanism of a mobile terminal of a folding screen, and meanwhile, the mechanical components occupy a large amount of installation space. Meanwhile, when the hinge mechanism is closed, the hinge mechanism needs to provide an accommodating space for the folding part of the flexible screen, and just because the accommodating space needs to be lifted, the overturning angle of the overturning component needs to be increased under the condition that the hinge is closed during design. However, due to the width limitation of the mounting base, two-stage sliding is often required on one flip member of the flip assembly. Even with the two-stage sliding design, there may be a state where the flip is temporarily detached from the mounting base in the closed state. Such a temporarily detached state may cause problems and risks that the flip interferes and cannot return again as the mobile terminal is used. Meanwhile, when the two ends slide, due to the angle relationship, one section close to the mounting base can bulge outwards, so that the width of the hinge mechanism is set according to the bulged width of the section. This also directly leads to the problem that the hinge mechanism of the mobile terminal of the folding screen cannot be reduced in width any more.

SUMMERY OF THE UTILITY MODEL

A first object of the present invention is to provide a hinge device which has a large accommodation space, a stable and reliable flip-fit, and a narrow width.

The technical scheme for realizing the first purpose of the utility model is as follows: the hinge device comprises a mounting base, overturning components arranged on two sides of the mounting base, a synchronous gear set used for enabling the overturning components on the two sides to synchronously rotate, and a damping component used for enabling the overturning components to form damping rotation when overturning; the synchronous gear set is arranged on the mounting base; the overturning assembly comprises a driving plate, a supporting plate, a first rotating plate and a second rotating plate; the lower end of the first rotating plate is rotatably connected with the mounting base and is used for driving a gear on the corresponding side of the synchronous gear set, and the upper end of the first rotating plate is in sliding compensation fit with the driving plate and the supporting plate respectively; the lower end of the second rotating plate is rotatably connected with the mounting base in a virtual shaft manner, and the upper end of the second rotating plate is rotatably connected with the supporting plate; when the driving plate is in a closed state of the hinge device, the supporting plates positioned on two sides of the mounting base are matched with the first rotating plate in a sliding compensation mode, and the upper end of the supporting plate is close to the lower end of the driving plate and is far away from the lower end of the driving plate under the rotation limitation of the second rotating plate and the rotation compensation of the supporting plate and the driving plate.

Furthermore, at least one overturning component is correspondingly matched with a damping component; the damping assembly comprises a first damping convex tooth, a second damping convex tooth, a damping spring and a first assembling shaft; the first damping convex teeth are arranged at the lower end of the corresponding first rotating plate and rotate coaxially with the lower end of the first rotating plate; the first assembling shaft is arranged on the mounting base and sequentially penetrates through the damping spring and the second damping convex teeth; the second damping convex tooth slides along the axial direction of the first assembling shaft but cannot rotate around the first assembling shaft; along with the rotation of the first rotating plate, the corresponding first damping convex teeth and the corresponding second damping convex teeth form damping rotation through distance difference formed in the continuous meshing process; the mounting base is also provided with a second assembling shaft; the second assembling shaft is arranged in parallel with the first assembling shaft; the second assembly shaft is sleeved with a return spring; the second damping convex teeth are provided with extension parts; the extension part and the extension part are arranged on the second assembling shaft in a sliding manner; two ends of the return spring respectively act on the mounting base and the extension part.

As an optimized deformation design, each overturning assembly is matched with one damping assembly; the second damping convex teeth on the two damping components are connected into a whole through a connecting plate; the mounting base is also provided with a second assembling shaft; the second assembling shaft is arranged in parallel with the first assembling shaft; the second assembly shaft is sleeved with a return spring; the connecting plate is arranged on the second assembling shaft in a sliding manner; two ends of the reset spring respectively act on the mounting base and the connecting plate.

Further, the second assembly axis is located between the first assembly axes of the two damping assemblies.

As an optimized deformation design, the turning plate assembly comprises a driving plate, a supporting plate, two first rotating plates and a second rotating plate; a synchronous gear set is correspondingly arranged on the mounting base corresponding to each first rotating plate; the lower end of the first rotating plate is rotatably connected with the mounting base and is used for driving gears on the corresponding side of the corresponding synchronous gear set, and the upper end of the first rotating plate is in sliding compensation fit with the driving plate and the supporting plate respectively; the lower end of the second rotating plate is rotatably connected with the mounting base in a virtual shaft manner, and the upper end of the second rotating plate is rotatably connected with the supporting plate; the two first rotating plates are positioned on two sides of the second rotating plate in the direction of the rotating axis of the second rotating plate.

Furthermore, one side or two sides of the first rotating plate are provided with damping components.

Further, the lower end of the first rotating plate is provided with a transmission gear, and the transmission gear at the lower end of the first rotating plate is a side gear of the synchronous gear set.

Further, the first rotating plate is rotatably arranged on the mounting base through a first assembling shaft.

Further, the first rotating plate comprises a plurality of plate bodies; the lower end of each plate body is rotatably connected with the mounting base; the adjacent plate bodies are in limit fit with the limit grooves through the limit blocks to form synchronous rotation; each plate forms friction with the mounting base and/or the cage of the synchronizing gear set.

Further, the first rotating plate comprises three plate bodies; the lower end of the plate body positioned in the middle is provided with a transmission gear, and the transmission gear is a gear on one side of the synchronous gear set; the end surfaces of the two sides of the plate body positioned in the middle are in friction with the mounting base; at least one end face of the plate bodies positioned on the two sides forms friction with the mounting base.

Furthermore, a compensation straight slot is arranged on the driving plate; the upper end of the first rotating plate is provided with a strip-shaped limiting block and a limiting pin which are matched with the compensation straight groove in a sliding compensation manner; the supporting plate is provided with a long groove used for forming sliding compensation matching with the limiting pin.

The driving plate or the first rotating plate is provided with an angle rotation stopping piece for limiting the over rotation of the driving plate when the driving plate is opened.

Furthermore, a limit stop block used for limiting the sliding of the strip-shaped limit block is arranged in the compensation straight groove; when the limit stop limits the strip-shaped limit block to continue sliding, the turnover assembly is in a fully opened state.

As a deformation optimization design, a limiting baffle plate for limiting the strip-shaped limiting block to continuously slide into the compensation straight groove is arranged on the first rotating plate; when the limiting baffle plate limits the strip-shaped limiting block to continuously slide, the overturning assembly is in a completely opened state.

A second object of the present invention is to provide a hinge mechanism using the above hinge device, which has a large accommodation space, stable and reliable flip-fit, and a narrow width.

The technical scheme for realizing the second purpose of the utility model is as follows: the hinge mechanism comprises a hinge mounting seat and a plurality of hinge devices; the hinge devices are fixedly arranged on the hinge mounting seats along the extending direction of the hinge mounting seats; the supporting plates on the same side of the adjacent hinge devices are connected into a whole through the auxiliary plate and are used for supporting the flexible screen.

A third object of the present invention is to provide a mobile terminal employing the above hinge mechanism, which has a large space for accommodating a folded portion of a flexible screen, a stable and reliable flip fit, and a narrow width.

The technical scheme for realizing the third purpose of the utility model is as follows: the mobile terminal comprises the hinge mechanism; the flexible screen, the left shell and the right shell are also included; the inner sides of the left casing and the right casing are respectively provided with a left supporting plate and a right supporting plate which support the rotation of the flexible screen, and the left supporting plate and the right supporting plate are fixedly connected with the flexible screen; the left shell is fixedly connected with a driving plate of the turning component on the left side of each hinge device; and the right side machine shell is fixedly connected with the driving plate of the turnover assembly on the right side of each hinge device.

The utility model has the positive effects that: (1) the structural design of the turnover component can provide a larger accommodating space for the folding part of the flexible screen (because the upper end of the supporting plate is close to and the lower end of the supporting plate is far away), and fundamentally avoids the design of two sections of sliding, so that the large accommodating space is met, the occupied space of the turnover component in use is reduced, favorable conditions are provided for width reduction, and favorable conditions are provided for the thinness of the mobile terminal when the mobile terminal is used.

(2) According to the utility model, the damping sense and the effect of locking the turning position can be increased through the damping assembly, and meanwhile, the damping sense can be further increased by increasing the number of the damping assemblies, so that the hand feeling is improved.

(3) The utility model can further improve the damping sense and the locking effect of the turning position through the return spring.

(4) The lower end of the first rotating plate is directly designed into a gear of the synchronous gear set, so that the overturning space of the overturning assembly can be further reduced, and favorable conditions are provided for reducing the whole width.

(5) The first rotating plate is formed by splicing a plurality of plate bodies, and each plate body is rubbed with the mounting base, so that the damping hand feeling can be further improved. And according to actual need, based on above-mentioned design, can rationally increase the quantity of the plate body of concatenation.

(6) The hinge device can prevent the hinge device from continuously turning after being completely opened through the angle rotation stopping piece, so that the hinge device is prevented from over-rotating.

(7) According to the hinge device, the first rotating plate and the driving plate are matched through the strip-shaped limiting block and the compensation straight groove, a larger contact surface can be formed, and the overturning stability of the whole hinge device is ensured.

Drawings

In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which

Fig. 1 is a schematic structural view of a hinge device according to embodiment 1 of the present invention;

FIG. 2 is a schematic rear view of FIG. 1;

fig. 3 is a schematic view of the hinge device according to embodiment 1 of the present invention with one supporting plate hidden;

FIG. 4 is a schematic view showing a closed state of the hinge device according to embodiment 1 of the present invention;

FIG. 5 is a side view of FIG. 3;

FIG. 6 is a schematic structural view of a hinge device according to embodiment 2 of the present invention;

FIG. 7 is a schematic rear view of FIG. 5;

fig. 8 is a schematic structural view of a first rotating plate in embodiment 1 of the present invention;

fig. 9 is a schematic structural view of a driving plate in embodiment 1 of the present invention;

FIG. 10 is a schematic structural view of a support plate in example 1 of the present invention;

fig. 11 is a schematic structural view of a first rotating plate in embodiment 2 of the present invention;

fig. 12 is a schematic structural view of a drive board in embodiment 2 of the present invention;

FIG. 13 is a schematic structural view of a support plate in embodiment 2 of the present invention;

fig. 14 is a schematic structural view of a limit baffle in embodiment 1 of the present invention;

FIG. 15 is a schematic structural view of example 3 of the present invention;

FIG. 16 is a schematic view showing the structure of the hinge mechanism in the present invention;

fig. 17 is a schematic structural diagram of a mobile terminal according to the present invention.

Detailed Description

(example 1)

Referring to fig. 1 to 5 and 8 to 10, the hinge device of the present invention comprises a mounting base 1, a tilting assembly 2 disposed at both sides of the mounting base 1, a synchronizing gear set 3 for synchronizing rotation of the tilting assembly 2 at both sides, and a damping assembly 4 for damping rotation of the tilting assembly 2 during tilting; the synchronous gear set 3 is arranged on the mounting base 1; the turnover assembly 2 comprises a driving plate 21, a supporting plate 22, a first rotating plate 23 and a second rotating plate 24; the lower end of the first rotating plate 23 is rotatably connected with the mounting base 1 and is used for driving a gear on the corresponding side of the synchronous gear set 3, and the upper end of the first rotating plate 23 is respectively in sliding compensation fit with the driving plate 21 and the supporting plate 22; the lower end of the second rotating plate 24 is in virtual shaft type rotating connection with the mounting base 1, and the upper end of the second rotating plate 24 is in rotating connection with the support plate 22; the upper end of the supporting plate 22 is positioned above the second rotating plate 24 and is in rotating connection with the driving plate 21; when the driving plate 21 is in the closed state of the hinge device, the supporting plates 22 at both sides of the mounting base 1 are in sliding compensation fit with the first rotating plate 23, and the upper end is close to the lower end and away from the lower end under the rotation limitation of the second rotating plate 24 and the rotation compensation of the supporting plates 22 and the driving plate 21.

The two axial sides of the first rotating plate 23 are respectively provided with a damping component 4 which is correspondingly matched with the first rotating plate; the damping assembly 4 comprises a first damping convex tooth 41, a second damping convex tooth 42, a damping spring 43 and a first assembling shaft 44; the first damping convex teeth 41 are arranged at the lower ends of the corresponding first rotating plates 23 and rotate coaxially with the lower ends of the first rotating plates 23, and the first damping convex teeth 41 and the first rotating plates 23 are integrated; the first damping convex teeth 41 are arranged on both axial sides of the lower end of the first rotating plate 23, so that the second damping convex teeth 42 of the damping component 4 on the side are matched; the first assembly shaft 44 is arranged on the mounting base 1 and sequentially penetrates through the damping spring 43 and the second damping convex tooth 42; the second damping convex tooth 42 slides along the axial direction of the first assembly shaft 44 but cannot rotate around the first assembly shaft 44; with the rotation of the first rotating plate 23, the corresponding first damping convex teeth 41 and second damping convex teeth 42 form damping rotation through the distance difference formed in the continuous meshing process.

The second damping convex teeth 42 on the two damping components 4 on the same side are connected into a whole through a connecting plate 45. A second assembly shaft 46 is also arranged between the two damping assemblies 4 on the same side; the second assembly shaft 46 is arranged in parallel with the first assembly shaft 44; a return spring 47 is sleeved on the second assembly shaft 46; the connecting plate 45 is slidably arranged on the second assembling shaft 46 on the corresponding side; two ends of the return spring 47 respectively act on the mounting base 1 and the connecting plate 45 on the corresponding sides.

The lower end of the first rotating plate 23 is provided with a transmission gear 231, and the transmission gear 231 at the lower end of the first rotating plate 23 is a side gear of the synchronizing gear set 3.

The first rotating plate 23 is rotatably provided on the mounting base 1 by a first fitting shaft 44.

In order to save assembly parts and assembly steps, the first assembly shafts 44 of the damping assemblies 4 on both sides of the first rotating plate 23 in the axial direction are the same, that is, the first assembly shafts 44 sequentially penetrate through the damping spring 43, the second damping convex tooth 42, the first damping convex tooth 41 and the first rotating plate 23 on one side and the first damping convex tooth 41, the second damping convex tooth 42 and the damping spring 43 on the other side.

The first rotating plate 23 comprises three plate bodies; the lower end of the plate body in the middle is provided with a transmission gear 231, and the transmission gear 231 is a gear on one side of the synchronous gear set 3; the end surfaces of two sides of the plate body positioned in the middle are respectively rubbed with the mounting base 1; the end surface of one side of the plate body positioned at two sides is provided with a first damping convex tooth 41, and the end surface of the other side forms friction with the mounting base 1.

The driving plate 21 is provided with a compensation straight slot 211; the upper end of the first rotating plate 23 is provided with a strip-shaped limit block 232 and a limit pin 233 which form sliding compensation matching with the compensation straight slot 211; the supporting plate 22 is provided with a long groove 221 for forming a sliding compensation fit with the limit pin 233. A gap for the long groove 221 to slide in is formed between two adjacent plate bodies of the first rotating plate 23, and two opposite end surfaces of the two plate bodies are provided with limit pins 233; strip-shaped limiting blocks 232 are formed on the two end faces of the two plate bodies which are opposite to each other.

Referring to fig. 14, a limit stopper 5 for limiting the sliding of the strip-shaped limit stopper 232 is arranged in the compensation straight groove 211; when the limit stopper 5 limits the strip-shaped limit block 232 to continue sliding, the turnover assembly 2 is in a fully opened state.

Referring to fig. 16, the hinge mechanism of the present invention comprises a hinge mount 6, a plurality of hinge devices as described above; the plurality of hinge devices are fixedly arranged on the hinge mounting seat 6 along the extending direction of the hinge mounting seat 6; the support plates 22 on the same side of adjacent hinge devices are connected together by the sub-plate 7 and serve to support the flexible screen.

Referring to fig. 17, the mobile terminal according to the present invention includes the hinge mechanism described above; the flexible screen 8, the left shell 9 and the right shell 10 are also included; a left supporting plate 11 and a right supporting plate 12 for supporting the rotation of the flexible screen are respectively arranged on the inner sides of the left casing 9 and the right casing 10, and the left supporting plate 11 and the right supporting plate 12 are fixedly connected with the flexible screen; the left machine shell 9 is fixedly connected with a driving plate 21 of the left overturning component 2 of each hinge device; the right housing 10 is fixedly connected to the driving plate 21 of the right flip assembly 2 of each hinge device.

(example 2)

Referring to fig. 6 and 7, and 11 to 13, the turnover assembly 2 of the present invention includes a driving plate 21, a supporting plate 22, two first rotating plates 23 and a second rotating plate 24; a synchronous gear set 3 is correspondingly arranged on the mounting base 1 corresponding to each first rotating plate 23; the lower end of the first rotating plate 23 is rotatably connected with the mounting base 1 and is used for driving the corresponding gear of the corresponding synchronous gear set 3, and the upper end of the first rotating plate 23 is respectively matched with the driving plate 21 and the supporting plate 22 in a sliding compensation manner; the lower end of the second rotating plate 23 is in virtual shaft type rotating connection with the mounting base 1, and the upper end of the second rotating plate 23 is in rotating connection with the support plate 22; the two first rotating plates 23 are located on both sides of the second rotating plate 24 in the rotational axis direction of the second rotating plate 24.

A damping assembly 4 is provided on the side of each first rotating plate 23 remote from the second rotating plate 24. The second damping convex teeth 42 on the two damping components 4 on the same side are connected into a whole through a connecting plate 45. A second assembly shaft 46 is also arranged between the two damping assemblies 4 on the same side; the second assembly shaft 46 is arranged in parallel with the first assembly shaft 44; a return spring 47 is sleeved on the second assembly shaft 46; the connecting plate 45 is slidably arranged on the second assembling shaft 46 on the corresponding side; two ends of the return spring 47 respectively act on the mounting base 1 and the connecting plate 45 on the corresponding sides.

The first rotating plate 23 comprises three plate bodies; the lower end of the plate body in the middle is provided with a transmission gear 231, and the transmission gear 231 is a gear on one side of the synchronous gear set 3; the end surfaces of two sides of the plate body positioned in the middle are respectively rubbed with the mounting base 1; a first damping convex tooth 41 is arranged on the end face, far away from the second rotating plate 24, of the plate body far away from the second rotating plate 24, and the end face of the other side of the plate body forms friction with the mounting base 1; the end surfaces of the two sides of the plate body close to the second rotating plate 24 are in friction with the mounting base 1.

The driving plate 21 is provided with a compensation straight slot 211; the upper end of the plate body of the first rotating plate 23 positioned in the middle is provided with a strip-shaped limit block 232 and a limit pin 233 which form sliding compensation matching with the compensation straight slot 211; the supporting plate 22 is provided with a long groove 221 for forming a sliding compensation fit with the limit pin 233.

Other technical features are the same as those of the hinge device in embodiment 1.

(example 3)

Referring to fig. 15, the first rotating plate 23 of the hinge device of the present invention is provided with a limit baffle 234 for limiting the strip-shaped limit block 232 to continuously slide into the compensation straight slot 211; when the limiting baffle 234 limits the strip-shaped limiting block 232 to continue sliding, the turnover component 2 is in a fully opened state.

(example 4)

The hinge mechanism comprises a hinge mounting seat 6; two hinge devices in the embodiment 1 are fixedly arranged at two ends of the hinge mounting seat 6, and the hinge device in the embodiment 2 is fixedly arranged in the middle of the hinge mounting seat; the support plates 22 on the same side of adjacent hinge devices are connected together by the sub-plate 7 and serve to support the flexible screen.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A hinge device is provided with a mounting base, overturning components arranged on two sides of the mounting base, a synchronous gear set used for enabling the overturning components on the two sides to synchronously rotate, and a damping component used for enabling the overturning components to form damping rotation when overturning; the synchronous gear set is arranged on the mounting base; the method is characterized in that: the overturning assembly comprises a driving plate, a supporting plate, a first rotating plate and a second rotating plate; the lower end of the first rotating plate is rotatably connected with the mounting base and is used for driving a gear on the corresponding side of the synchronous gear set, and the upper end of the first rotating plate is in sliding compensation fit with the driving plate and the supporting plate respectively; the lower end of the second rotating plate is rotatably connected with the mounting base in a virtual shaft manner, and the upper end of the second rotating plate is rotatably connected with the supporting plate; the supporting plate is rotationally connected with the driving plate; when the driving plate is in a closed state of the hinge device, the supporting plates positioned on two sides of the mounting base are matched with the first rotating plate in a sliding compensation mode, and the upper end of the supporting plate is close to the lower end of the driving plate and is far away from the lower end of the driving plate under the rotation limitation of the second rotating plate and the rotation compensation of the supporting plate and the driving plate.

2. A hinge assembly according to claim 1, wherein: at least one overturning component is correspondingly matched with a damping component; the damping assembly comprises a first damping convex tooth, a second damping convex tooth, a damping spring and a first assembling shaft; the first damping convex teeth are arranged at the lower end of the corresponding first rotating plate and rotate coaxially with the lower end of the first rotating plate; the first assembling shaft is arranged on the mounting base and sequentially penetrates through the damping spring and the second damping convex teeth; the second damping convex tooth slides along the axial direction of the first assembling shaft but cannot rotate around the first assembling shaft; along with the rotation of the first rotating plate, the corresponding first damping convex teeth and the corresponding second damping convex teeth form damping rotation through distance difference formed in the continuous meshing process.

3. A hinge assembly according to claim 2, wherein: each overturning assembly is matched with one damping assembly; the second damping convex teeth on the two damping assemblies are connected into a whole through a connecting plate.

4. A hinge assembly according to claim 2, wherein: the mounting base is also provided with a second assembling shaft; the second assembling shaft is arranged in parallel with the first assembling shaft; the second assembly shaft is sleeved with a return spring; the second damping convex teeth are provided with extension parts; the extension part and the extension part are arranged on the second assembling shaft in a sliding manner; two ends of the return spring respectively act on the mounting base and the extension part.

5. A hinge assembly according to claim 3, wherein: the mounting base is also provided with a second assembling shaft; the second assembling shaft is arranged in parallel with the first assembling shaft; the second assembly shaft is sleeved with a return spring; the connecting plate is arranged on the second assembling shaft in a sliding manner; two ends of the reset spring respectively act on the mounting base and the connecting plate.

6. A hinge assembly according to claim 5, wherein: the second mounting shaft is located between the first mounting shafts of the two damping assemblies.

7. A hinge assembly according to claim 2 or 3 or 4 or 5 or 6, wherein: and one side or two sides of the first rotating plate are provided with damping components.

8. A hinge assembly according to claim 2 or 3 or 4 or 5 or 6, wherein: the overturning assembly comprises a driving plate, a supporting plate, two first rotating plates and a second rotating plate; a synchronous gear set is correspondingly arranged on the mounting base corresponding to each first rotating plate; the lower end of the first rotating plate is rotatably connected with the mounting base and is used for driving gears on the corresponding side of the corresponding synchronous gear set, and the upper end of the first rotating plate is in sliding compensation fit with the driving plate and the supporting plate respectively; the lower end of the second rotating plate is rotatably connected with the mounting base in a virtual shaft manner, and the upper end of the second rotating plate is rotatably connected with the supporting plate; the two first rotating plates are positioned on two sides of the second rotating plate in the direction of the rotating axis of the second rotating plate.

9. A hinge assembly according to claim 8, wherein: and one side or two sides of the first rotating plate are provided with damping components.

10. A hinge assembly according to claim 1 or 2 or 3 or 4 or 5 or 6, wherein: the lower end of the first rotating plate is provided with a transmission gear, and the transmission gear at the lower end of the first rotating plate is a side gear of the synchronous gear set.

11. A hinge assembly according to claim 8, wherein: the lower end of the first rotating plate is provided with a transmission gear, and the transmission gear at the lower end of the first rotating plate is a side gear of the synchronous gear set.

12. A hinge assembly according to claim 2 or 3 or 4 or 5 or 6, wherein: the first rotating plate is rotatably arranged on the mounting base through a first assembling shaft.

13. A hinge assembly according to claim 2 or 3 or 4 or 5 or 6, wherein: the first rotating plate comprises a plurality of plate bodies; the lower end of each plate body is rotatably connected with the mounting base; the adjacent plate bodies are in limit fit with the limit grooves through the limit blocks to form synchronous rotation; each plate forms friction with the mounting base and/or the cage of the synchronizing gear set.

14. A hinge assembly according to claim 8, wherein: the first rotating plate comprises a plurality of plate bodies; the lower end of each plate body is rotatably connected with the mounting base; the adjacent plate bodies are in limit fit with the limit grooves through the limit blocks to form synchronous rotation; each plate body forms friction with the mounting base.

15. A hinge assembly according to claim 13, wherein: the first rotating plate comprises three plate bodies; the lower end of the plate body positioned in the middle is provided with a transmission gear, and the transmission gear is a gear on one side of the synchronous gear set; the end surfaces of the two sides of the plate body positioned in the middle are in friction with the mounting base; at least one end face of the plate bodies positioned on the two sides forms friction with the mounting base.

16. A hinge assembly according to claim 14, wherein: the first rotating plate comprises three plate bodies; the lower end of the plate body positioned in the middle is provided with a transmission gear, and the transmission gear is a gear on one side of the synchronous gear set; the end surfaces of the two sides of the plate body positioned in the middle are in friction with the mounting base; at least one end face of the plate bodies positioned on the two sides forms friction with the mounting base.

17. A hinge assembly according to claim 1 or 2 or 3 or 4 or 5 or 6, wherein: the driving plate is provided with a compensation straight slot; the upper end of the first rotating plate is provided with a strip-shaped limiting block and a limiting pin which are matched with the compensation straight groove in a sliding compensation manner; the supporting plate is provided with a long groove used for forming sliding compensation matching with the limiting pin.

18. A hinge assembly according to claim 1 or 2 or 3 or 4 or 5 or 6, wherein: and the driving plate or the first rotating plate is provided with an angle rotation stopping piece for limiting the over rotation of the driving plate when the driving plate is opened.

19. A hinge assembly according to claim 17, wherein: a limit stop block used for limiting the sliding of the strip-shaped limit block is arranged in the compensation straight groove; when the limit stop limits the strip-shaped limit block to continue sliding, the turnover assembly is in a fully opened state.

20. A hinge assembly according to claim 18, wherein: the first rotating plate is provided with a limiting baffle plate for limiting the strip-shaped limiting block to continuously slide into the compensation straight groove; when the limiting baffle plate limits the strip-shaped limiting block to continuously slide, the overturning assembly is in a completely opened state.

21. A hinge mechanism characterized by: comprising a hinge mount, a plurality of hinge devices of claim 1 or 2 or 3 or 4 or 5 or 6; the hinge devices are fixedly arranged on the hinge mounting seats along the extending direction of the hinge mounting seats; the supporting plates on the same side of the adjacent hinge devices are connected into a whole through the auxiliary plate and are used for supporting the flexible screen.

22. A hinge mechanism characterized by: comprises a hinge mounting seat; a hinge device as claimed in claim 8 and two hinge devices as claimed in claim 1 or 2 or 3 or 4 or 5 or 6 symmetrically arranged at both sides of a hinge device as claimed in claim 8 are fixed on the hinge mounting seat; the supporting plates on the same side of the adjacent hinge devices are connected into a whole through the auxiliary plate and are used for supporting the flexible screen.

23. A mobile terminal, characterized by: a hinge mechanism comprising the hinge of claim 21; the flexible screen, the left shell and the right shell are also included; the inner sides of the left casing and the right casing are respectively provided with a left supporting plate and a right supporting plate which support the rotation of the flexible screen, and the left supporting plate and the right supporting plate are fixedly connected with the flexible screen; the left shell is fixedly connected with a driving plate of the turning component on the left side of each hinge device; and the right side machine shell is fixedly connected with the driving plate of the turnover assembly on the right side of each hinge device.

24. A mobile terminal, characterized by: a hinge mechanism comprising the hinge of claim 22; the flexible screen, the left shell and the right shell are also included; the inner sides of the left casing and the right casing are respectively provided with a left supporting plate and a right supporting plate which support the rotation of the flexible screen, and the left supporting plate and the right supporting plate are fixedly connected with the flexible screen; the left shell is fixedly connected with a driving plate of the turning component on the left side of each hinge device; and the right side machine shell is fixedly connected with the driving plate of the turnover assembly on the right side of each hinge device.