Hinge device, hinge mechanism and mobile terminal

Abstract

The present invention relates to a hinge device, a hinge mechanism and a mobile terminal, wherein the hinge device has a mounting base, a flip assembly arranged on both sides of the mounting base, a synchronous gear set for the flip assembly to rotate synchronously, and a damping assembly; the flip assembly includes a driving plate, a supporting plate, a first rotating plate and a second rotating plate; the lower end of the first rotating plate is rotationally connected with the mounting base and is used to drive the gear on the corresponding side of the synchronous gear set, and the upper end of the first rotating plate forms a sliding compensation fit with the driving plate and the supporting plate respectively; the lower end of the second rotating plate forms a virtual axis rotation connection with the mounting base, and the upper end of the second rotating plate forms a rotation connection with the supporting plate; the supporting plate is rotationally connected with the driving plate; when the hinge device is closed, the relative supporting plates form a shape in which the upper end is close to the lower end and far away. The present invention can effectively reduce the width of the mounting base, thereby reducing the width of the hinge mounting seat on the hinge mechanism and the mobile terminal, providing favorable conditions for the thinning of the product.

Description

Technical Field

[0001] The present invention relates to electronic equipment components, and in particular to a hinge device, a hinge mechanism and a mobile terminal. Background Art

[0002] With the continuous advancement and expansion of technology in the field of mobile terminals, and the advent of the 5G network era, people are becoming more and more dependent on mobile terminals. Nowadays, with the continuous updating of various chat, video and other software, people feel that conventional touch screen phones or tablets are no longer enough, mainly because the size of the screen is limited by the size of the mobile terminal.

[0003] In order to solve this problem, people invented flexible screens and applied them to mobile terminals. Through the folding design, the mobile terminal can meet people's requirements for portability and can expand the screen of the mobile terminal by unfolding when needed. In order to achieve the above requirements, the key lies in whether the design of the hinge mechanism is reasonable.

[0004] At present, the hinge mechanism of the mobile terminal with folding screen often needs to design different mechanical components to meet the requirements in order to achieve synchronous flipping, damping feel, etc. in a limited space. At the same time, these mechanical components occupy a large amount of installation space. At the same time, when the hinge mechanism is closed, the hinge mechanism needs to provide accommodation space for the folding part of the flexible screen. It is precisely because of the need to increase the accommodation space that the flip angle of the flip component in the closed state of the hinge needs to be increased during design. However, due to the width limitation of the mounting base, two sections of sliding are often required on a flip part of the flip component. Even with the design of two-section sliding, there may be a state in which the flip part is temporarily separated from the mounting base in the closed state. With the use of the mobile terminal, this temporary separation state may cause the problem and risk of the flip part interfering and unable to return to its original position. At the same time, when the two ends slide, due to the angle relationship, the section close to the mounting base will bulge outward, causing the width of the hinge mechanism to be determined by the width of the bulged section. This also directly leads to the problem that the hinge mechanism of the mobile terminal with folding screen can no longer reduce the width. Summary of the invention

[0005] The first object of the present invention is to provide a hinge device with a large accommodating space, stable and reliable flipping fit, and a narrow width.

[0006] The technical solution for achieving the first purpose of the present invention is: a hinge device in the present invention comprises a mounting base, a flip assembly arranged on both sides of the mounting base, a synchronous gear group for synchronously rotating the flip assemblies on both sides, and a damping assembly for forming a damped rotation when the flip assembly flips; the synchronous gear group is arranged on the mounting base; the flip 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 to the mounting base and is used to drive the gear on the corresponding side of the synchronous gear group, and the upper end of the first rotating plate forms a sliding compensation fit with the driving plate and the supporting plate respectively; the lower end of the second rotating plate forms a virtual axis type rotation connection with the mounting base, and the upper end of the second rotating plate forms a rotation connection with the support plate; when the driving plate is in a closed state of the hinge device, the support plates located on both sides of the mounting base form a shape in which the upper end is close to the lower end and away from the lower end under the sliding compensation fit of the first rotating plate, the rotation limitation of the second rotating plate and the rotation compensation of the support plate and the driving plate.

[0007] Furthermore, at least one flip assembly corresponds to a damping assembly; the damping assembly includes a first damping protrusion, a second damping protrusion, a damping spring and a first assembly shaft; the first damping protrusion is arranged at the lower end of the corresponding first rotating plate and rotates coaxially with the lower end of the first rotating plate; the first assembly shaft is arranged on the mounting base and passes through the damping spring and the second damping protrusion in sequence; the second damping protrusion slides along the axial direction of the first assembly shaft, but cannot rotate around the first assembly shaft; as the first rotating plate rotates, the corresponding first damping protrusion and the second damping protrusion form a damped rotation through the distance difference formed during the continuous meshing process; a second assembly shaft is also provided on the mounting base; the second assembly shaft is arranged parallel to the first assembly shaft; a reset spring is mounted on the second assembly shaft; an extension portion is provided on the second damping protrusion; the extension portion and the sliding portion are arranged on the second assembly shaft; the two ends of the reset spring act on the mounting base and the extension portion respectively.

[0008] As an optimized deformation design, each flip component cooperates with a damping component; the second damping teeth on the two damping components are connected into one through a connecting plate; a second assembly axis is also provided on the mounting base; the second assembly axis is arranged parallel to the first assembly axis; a return spring is mounted on the second assembly axis; the connecting plate is slidably arranged on the second assembly axis; and the two ends of the return spring act on the mounting base and the connecting plate respectively.

[0009] Furthermore, the second assembly axis is located between the first assembly axes of the two damping assemblies.

[0010] As an optimized deformation design, the above-mentioned flip plate assembly includes a driving plate, a support plate, two first rotating plates and a second rotating plate; a synchronous gear set is correspondingly provided at each first rotating plate on the mounting base; the lower end of the first rotating plate is rotatably connected to the mounting base and is used to drive the gear on the corresponding side of the corresponding synchronous gear set, and the upper end of the first rotating plate forms a sliding compensation fit with the driving plate and the support plate respectively; the lower end of the second rotating plate forms a virtual axis type rotating connection with the mounting base, and the upper end of the second rotating plate forms a rotating connection with the support plate; the two first rotating plates are located on both sides of the second rotating plate in the direction of the rotation axis of the second rotating plate.

[0011] Furthermore, a damping assembly is provided on one side or both sides of the first rotating plate.

[0012] Furthermore, a transmission tooth is provided at the lower end of the first rotating plate, and the transmission tooth at the lower end of the first rotating plate is a side gear of the synchronous gear set.

[0013] Furthermore, the first rotating plate is rotatably arranged on the mounting base via a first assembly shaft.

[0014] Furthermore, the above-mentioned first rotating plate includes multiple plate bodies; the lower end of each plate body is rotatably connected to the mounting base; adjacent plate bodies form synchronous rotation through the limiting cooperation of the limiting block and the limiting groove; each plate body forms friction with the mounting base and / or the retaining frame of the synchronous gear set.

[0015] Furthermore, the above-mentioned first rotating plate includes three plate bodies; a transmission tooth is provided at the lower end of the middle plate body, and the transmission tooth is a side gear of the synchronous gear set; both side end faces of the middle plate body form friction with the mounting base; at least one end face of the plate body located on both sides forms friction with the mounting base.

[0016] Furthermore, the driving plate is provided with a compensating straight groove; the upper end of the first rotating plate is provided with a strip limit block and a limit pin that form a sliding compensation fit with the compensating straight groove; the support plate is provided with a long groove that is used to form a sliding compensation fit with the limit pin.

[0017] The driving plate or the first rotating plate is provided with an angle stopper for limiting over-rotation when the driving plate is opened.

[0018] Furthermore, a limit stopper for limiting the sliding of the strip-shaped limit block is provided in the above-mentioned compensating straight groove; when the limit stopper limits the strip-shaped limit block from continuing to slide, the flip assembly is in a fully open state.

[0019] As a deformation optimization design, the first rotating plate is provided with a limit baffle for limiting the strip limit block from continuing to slide into the compensating straight groove; when the limit baffle limits the strip limit block from continuing to slide, the flip assembly is in a fully open state.

[0020] A second object of the present invention is to provide a hinge mechanism using the above hinge device, which has a large accommodating space, stable and reliable flipping fit, and a narrow width.

[0021] The technical solution for achieving the second purpose of the present invention is: the hinge mechanism in the present invention includes a hinge mounting seat and a plurality of the above-mentioned hinge devices; the plurality of hinge devices are fixedly mounted on the hinge mounting seat along the extension direction of the hinge mounting seat; the support plates on the same side of adjacent hinge devices are connected into one through a sub-plate and are used to support the flexible screen.

[0022] The third object of the present invention is to provide a mobile terminal using the above-mentioned hinge mechanism, which has a large space for accommodating the folding part of the flexible screen, stable and reliable flipping cooperation, and a narrow width.

[0023] The technical solution for achieving the third purpose of the present invention is: the mobile terminal in the present invention includes the above-mentioned hinge mechanism; it also includes a flexible screen, a left casing and a right casing; the inner sides of the left casing and the right casing are respectively installed with a left support plate and a right support plate for supporting the rotation of the flexible screen, and the left support plate and the right support plate are fixedly connected to the flexible screen; the left casing is fixedly connected to the driving plate of the flip assembly on the left side of each hinge device; the right casing is fixedly connected to the driving plate of the flip assembly on the right side of each hinge device.

[0024] The present invention has positive effects: (1) The structural design of the flip assembly in the present invention can not only provide a larger accommodating space for the folding part of the flexible screen (because the upper end of the support plate is close and the lower end is far away), but also fundamentally avoid the two-stage sliding design, thereby meeting the large accommodating space while reducing the space occupied by the flip assembly during use, providing favorable conditions for reducing the width, and when used in a mobile terminal, providing more favorable conditions for the thinness of the mobile terminal.

[0025] (2) The present invention can increase the damping feeling and the effect of flip position locking by using the damping component, and can further increase the damping feeling and improve the hand feel by increasing the number of damping components.

[0026] (3) The present invention can further enhance the damping feeling and the flip position locking effect through the return spring.

[0027] (4) The present invention directly designs the lower end of the first rotating plate to be a gear of a synchronous gear set, which can further reduce the turning space of the turning assembly, thereby providing favorable conditions for reducing the overall width.

[0028] (5) The first rotating plate in the present invention is formed by splicing a plurality of plates, and each plate forms friction with the mounting base, which can further enhance the damping feel. And according to actual needs, based on the above design ideas, the number of spliced ​​plates can be reasonably increased.

[0029] (6) The present invention can prevent the hinge device from continuing to flip over after being fully opened, thereby causing over-rotation, by using the angle stopper.

[0030] (7) In the present invention, the first rotating plate and the driving plate can form a larger contact surface through the cooperation of the strip-shaped limit block and the compensating straight groove, thereby ensuring the flipping stability of the entire hinge device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments and in conjunction with the accompanying drawings, wherein

[0032] Figure 1 is a schematic structural diagram of a hinge device in Example 1 of the present invention;

[0033] Figure 2 for Figure 1 Schematic diagram of the back side;

[0034] Figure 3 This is a schematic diagram of the hinge device in Example 1 of the present invention with one support plate hidden;

[0035] Figure 4 This is a schematic diagram of the closed state of the hinge device in Example 1 of the present invention;

[0036] Figure 5 for Figure 3 Side view of

[0037] Figure 6 is a schematic structural diagram of a hinge device in Example 2 of the present invention;

[0038] Figure 7 for Figure 5 Schematic diagram of the back side;

[0039] Figure 8 is a schematic structural diagram of the first rotating plate in Embodiment 1 of the present invention;

[0040] Fig. 9 Schematic diagram of the structure of the driving board in Example 1 of the present invention;

[0041] Fig.10 This is a schematic diagram of the structure of the support plate in Example 1 of the present invention;

[0042] Fig.11 is a schematic structural diagram of the first rotating plate in Embodiment 2 of the present invention;

[0043] Fig.12 Schematic diagram of the structure of the driving board in Example 2 of the present invention;

[0044] Fig.13 This is a schematic diagram of the structure of the support plate in Example 2 of the present invention;

[0045] Fig.14 This is a schematic diagram of the structure of the limit baffle in Example 1 of the present invention;

[0046] Fig.15 This is a schematic diagram of the structure of Embodiment 3 of the present invention;

[0047] Fig.16 It is a structural schematic diagram of the hinge mechanism in the present invention;

[0048] Fig.17 It is a structural schematic diagram of the mobile terminal in the present invention. DETAILED DESCRIPTION

[0049] (Example 1)

[0050] See Figures 1 to 5 ,as well as Figures 8 to 10 The hinge device of the present invention comprises a mounting base 1, a flip assembly 2 arranged on both sides of the mounting base 1, a synchronous gear set 3 for the flip assemblies 2 on both sides to rotate synchronously, and a damping assembly 4 for the flip assembly 2 to form a damped rotation when flipping; the synchronous gear set 3 is arranged on the mounting base 1; the flip 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 to the mounting base 1 and is used to drive the gears on the corresponding side of the synchronous gear set 3, and the upper ends of the first rotating plate 23 are respectively connected to the driving plate 2 1 and the support plate 22 form a sliding compensation fit; the lower end of the second rotating plate 24 forms a virtual axis rotation connection with the mounting base 1, and the upper end of the second rotating plate 24 forms a rotation connection with the support plate 22; the upper end of the support plate 22 and located above the second rotating plate 24 forms a rotation connection with the driving plate 21; when the driving plate 21 is in a closed state of the hinge device, the support plates 22 located on both sides of the mounting base 1 form a shape in which the upper end is close to the lower end and away from the lower end under the sliding compensation fit of the first rotating plate 23, the rotation limitation of the second rotating plate 24, and the rotation compensation of the support plate 22 and the driving plate 21.

[0051] A damping assembly 4 is provided on both axial sides of the first rotating plate 23 for corresponding cooperation; the damping assembly 4 includes a first damping protruding tooth 41, a second damping protruding tooth 42, a damping spring 43 and a first assembly shaft 44; the first damping protruding tooth 41 is arranged at the lower end of the corresponding first rotating plate 23 and rotates coaxially with the lower end of the first rotating plate 23, and the first damping protruding tooth 41 and the first rotating plate 23 are an integral part; first damping protruding teeth 41 are provided on both axial sides of the lower end of the first rotating plate 23 to facilitate the cooperation of the second damping protruding tooth 42 of the damping assembly 4 on this side; the first assembly shaft 44 is provided on the mounting base 1, and passes through the damping spring 43 and the second damping protruding tooth 42 in sequence; the second damping protruding tooth 42 slides along the axial direction of the first assembly shaft 44, but cannot rotate around the first assembly shaft 44; as the first rotating plate 23 rotates, the corresponding first damping protruding tooth 41 and the second damping protruding tooth 42 form a damped rotation through the distance difference formed in the continuous meshing process.

[0052] The second damping protruding teeth 42 on the two damping components 4 on the same side are connected into one body through a connecting plate 45. A second assembly shaft 46 is also provided between the two damping components 4 on the same side; the second assembly shaft 46 is arranged parallel to 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 assembly shaft 46 on the corresponding side; and the two ends of the return spring 47 act on the mounting base 1 and the connecting plate 45 on the corresponding side respectively.

[0053] A transmission tooth 231 is disposed at the lower end of the first rotating plate 23 . The transmission tooth 231 at the lower end of the first rotating plate 23 is a side gear of the synchronous gear set 3 .

[0054] The first rotating plate 23 is rotatably disposed on the mounting base 1 via a first assembly shaft 44 .

[0055] In order to save assembly parts and assembly steps, the first assembly shaft 44 of the damping assembly 4 on both axial sides of the first rotating plate 23 is the same, that is, the first assembly shaft 44 passes through the damping spring 43, the second damping tooth 42, the first damping tooth 41, and the first rotating plate 23 on one side, and the first damping tooth 41, the second damping tooth 42, and the damping spring 43 on the other side in sequence.

[0056] The first rotating plate 23 includes three plates; a transmission tooth 231 is provided at the lower end of the middle plate, and the transmission tooth 231 is a gear on one side of the synchronous gear set 3; both side end surfaces of the middle plate form friction with the mounting base 1; a first damping convex tooth 41 is provided on one side end surface of the plate bodies on both sides, and the other side end surface forms friction with the mounting base 1.

[0057] The driving plate 21 is provided with a compensation straight groove 211; the upper end of the first rotating plate 23 is provided with a strip-shaped stopper 232 and a stopper pin 233 that form a sliding compensation match with the compensation straight groove 211; the supporting plate 22 is provided with a long groove 221 that forms a sliding compensation match with the stopper pin 233. A gap is formed between two adjacent plates of the first rotating plate 23 for the long groove 221 to slide inside, and the two end surfaces of the two plates facing each other are provided with a stopper pin 233; and the two end surfaces of the two plates facing each other are formed with a strip-shaped stopper 232.

[0058] See Fig.14 The compensation straight groove 211 is provided with a limit block 5 for limiting the sliding of the strip limit block 232; when the limit block 5 limits the strip limit block 232 to continue sliding, the flip assembly 2 is in a fully open state.

[0059] See Fig.16 In the present invention, the hinge mechanism includes a hinge mounting seat 6 and a plurality of the above-mentioned hinge devices; the plurality of hinge devices are fixedly mounted on the hinge mounting seat 6 along the extension direction of the hinge mounting seat 6; the support plates 22 on the same side of adjacent hinge devices are connected into one through a sub-plate 7 and are used to support the flexible screen.

[0060] See Fig.17 The mobile terminal in the present invention includes the above-mentioned hinge mechanism; it also includes a flexible screen 8, a left casing 9 and a right casing 10; the inner sides of the left casing 9 and the right casing 10 are respectively installed with a left support plate 11 and a right support plate 12 for supporting the rotation of the flexible screen, and the left support plate 11 and the right support plate 12 are fixedly connected to the flexible screen; the left casing 9 is fixedly connected to the driving plate 21 of the flip assembly 2 on the left side of each hinge device; the right casing 10 is fixedly connected to the driving plate 21 of the flip assembly 2 on the right side of each hinge device.

[0061] (Example 2)

[0062] See Figure 6 and Figure 7 ,as well as Figures 11 to 13 In the present invention, the flap assembly 2 includes a driving plate 21, a support plate 22, two first rotating plates 23 and a second rotating plate 24; a synchronous gear set 3 is correspondingly provided at each first rotating plate 23 on the mounting base 1; the lower end of the first rotating plate 23 is rotatably connected to the mounting base 1 and is used to drive the gear on the corresponding side of the corresponding synchronous gear set 3, and the upper end of the first rotating plate 23 forms a sliding compensation fit with the driving plate 21 and the support plate 22 respectively; the lower end of the second rotating plate 23 forms a virtual axis rotation connection with the mounting base 1, and the upper end of the second rotating plate 23 forms a rotation 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 direction of the rotation axis of the second rotating plate 24.

[0063] A damping assembly 4 is provided on one side of each first rotating plate 23 away from the second rotating plate 24. The second damping protruding teeth 42 on the two damping assemblies 4 on the same side are connected as a whole by a connecting plate 45. A second assembly shaft 46 is also provided between the two damping assemblies 4 on the same side; the second assembly shaft 46 is arranged parallel to 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 assembly shaft 46 on the corresponding side; and the two ends of the return spring 47 act on the mounting base 1 and the connecting plate 45 on the corresponding side respectively.

[0064] The first rotating plate 23 includes three plates; a transmission tooth 231 is provided at the lower end of the middle plate, and the transmission tooth 231 is a gear on one side of the synchronous gear set 3; both side end faces of the middle plate form friction with the mounting base 1; a first damping convex tooth 41 is provided on the end face of the plate away from the second rotating plate 24, and the other side end face forms friction with the mounting base 1; both side end faces of the plate close to the second rotating plate 24 form friction with the mounting base 1.

[0065] The driving plate 21 is provided with a compensating straight groove 211; the upper end of the middle plate body of the first rotating plate 23 is provided with a strip limit block 232 and a limit pin 233 that form a sliding compensation fit with the compensating straight groove 211; the support plate 22 is provided with a long groove 221 that is used to form a sliding compensation fit with the limit pin 233.

[0066] Other technical features are the same as the hinge device in Example 1.

[0067] (Example 3)

[0068] See Fig.15 In the present invention, a limit baffle 234 is provided on the first rotating plate 23 of the hinge device for limiting the strip limit block 232 from continuing to slide into the compensation straight groove 211; when the limit baffle 234 limits the strip limit block 232 from continuing to slide, the flip assembly 2 is in a fully open state.

[0069] Other technical features are the same as the hinge device in Example 1.

[0070] (Example 4)

[0071] The hinge mechanism in the present invention includes a hinge mounting seat 6; two hinge devices in Example 1 are fixedly provided at both ends of the hinge mounting seat 6, and a hinge device in Example 2 is fixedly provided in the middle; the support plates 22 on the same side of adjacent hinge devices are connected into one through a sub-plate 7 and are used to support the flexible screen.

[0072] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hinge device, comprising a mounting base, flip assemblies arranged on both sides of the mounting base, a synchronous gear set for the flip assemblies on both sides to rotate synchronously, and a damping assembly for forming damped rotation when the flip assemblies flip; the synchronous gear set is arranged on the mounting base; characterized in that: The flip assembly includes 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 to the mounting base and is used to drive the gear on the corresponding side of the synchronous gear set, and the upper end of the first rotating plate forms a sliding compensation fit with the driving plate and the supporting plate respectively; the lower end of the second rotating plate forms a virtual axis rotation connection with the mounting base, and the upper end of the second rotating plate forms a rotation connection with the supporting plate; the support plate forms a rotation connection with the driving plate; when the driving plate is in a closed state of the hinge device, the support plates located on both sides of the mounting base form a shape in which the upper end approaches the lower end and moves away from the lower end under the sliding compensation fit of the first rotating plate, the rotation limitation of the second rotating plate, and the rotation compensation of the support plate and the driving plate; At least one flip assembly is matched with a damping assembly; the damping assembly includes a first damping convex tooth, a second damping convex tooth, a damping spring and a first assembly shaft; the first damping convex tooth is arranged at the lower end of the corresponding first rotating plate and rotates coaxially with the lower end of the first rotating plate; the first assembly shaft is arranged on the mounting base and passes through the damping spring and the second damping convex tooth in sequence; the second damping convex tooth slides along the axial direction of the first assembly shaft, but cannot rotate around the first assembly shaft; as the first rotating plate rotates, the corresponding first damping convex tooth and the second damping convex tooth form a damped rotation through the distance difference formed in the continuous meshing process; The flip assembly includes a driving plate, a supporting plate, two first rotating plates and a second rotating plate; a synchronous gear set is correspondingly provided at each first rotating plate on the mounting base; the lower end of the first rotating plate is rotatably connected with the mounting base and is used to drive the gear on the corresponding side of the corresponding synchronous gear set, and the upper end of the first rotating plate forms a sliding compensation fit with the driving plate and the supporting plate respectively; the lower end of the second rotating plate forms a virtual axis rotation connection with the mounting base, and the upper end of the second rotating plate forms a rotation connection with the supporting plate; the two first rotating plates are located on both sides of the second rotating plate in the direction of the rotation axis of the second rotating plate; The lower end of the first rotating plate is provided with a transmission tooth, and the transmission tooth at the lower end of the first rotating plate is a side gear of the synchronous gear set; The first rotating plate comprises a plurality of plate bodies; the lower end of each plate body is rotatably connected to the mounting base; adjacent plate bodies are synchronously rotated by the limiting cooperation of the limiting block and the limiting groove; each plate body forms friction with the mounting base and / or the retaining frame of the synchronous gear set; The driving plate is provided with a compensating straight groove; the upper end of the first rotating plate is provided with a strip-shaped limit block and a limit pin that form a sliding compensation fit with the compensating straight groove; the support plate is provided with a long groove that is used to form a sliding compensation fit with the limit pin.

2. A hinge device according to claim 1, characterized in that: Each flip assembly cooperates with a damping assembly; the second damping protruding teeth on the two damping assemblies are connected into one through a connecting plate.

3. A hinge device according to claim 1, characterized in that: A second assembly shaft is also provided on the mounting base; the second assembly shaft is arranged parallel to the first assembly shaft; a return spring is sleeved on the second assembly shaft; an extension portion is provided on the second damping tooth; the extension portion and the sliding portion are arranged on the second assembly shaft; the two ends of the return spring act on the mounting base and the extension portion respectively.

4. A hinge device according to claim 2, characterized in that: The mounting base is also provided with a second assembly shaft; the second assembly shaft is arranged parallel to the first assembly shaft; a return spring is sleeved on the second assembly shaft; the connecting plate is slidably arranged on the second assembly shaft; and the two ends of the return spring act on the mounting base and the connecting plate respectively.

5. A hinge device according to claim 4, characterized in that: The second assembly axis is located between the first assembly axes of the two damping assemblies.

6. A hinge device according to claim 1 or 2 or 3 or 4 or 5, characterized in that: A damping assembly is provided on one side or both sides of the first rotating plate.

7. A hinge device according to claim 1 or 2 or 3 or 4 or 5, characterized in that: The first rotating plate is rotatably arranged on the mounting base via a first assembly shaft.

8. The hinge device according to claim 1, characterized in that: The first rotating plate includes three plates; a transmission tooth is provided at the lower end of the middle plate, which is a gear on one side of the synchronous gear set; both side end faces of the middle plate form friction with the mounting base; at least one end face of the plate on both sides forms friction with the mounting base.

9. A hinge device according to claim 1 or 2 or 3 or 4 or 5, characterized in that: The driving plate or the first rotating plate is provided with an angle stopper for limiting over-rotation when the driving plate is opened.

10. The hinge device according to claim 1, characterized in that: A limit stopper for limiting the sliding of the strip-shaped limit block is arranged in the compensation straight groove; when the limit stopper limits the strip-shaped limit block from continuing to slide, the flip assembly is in a fully open state.

11. A hinge device according to claim 9, characterized in that: The first rotating plate is provided with a limit baffle for limiting the strip limit block from continuing to slide into the compensation straight groove; when the limit baffle limits the strip limit block from continuing to slide, the flip assembly is in a fully open state.

12. A hinge mechanism, characterized in that: It includes a hinge mounting seat, and a plurality of hinge devices as described in claim 1 or 2 or 3 or 4 or 5; a plurality of hinge devices are fixedly mounted on the hinge mounting seat along the extension direction of the hinge mounting seat; the support plates on the same side of adjacent hinge devices are connected into one through a sub-plate and are used to support a flexible screen.

13. A mobile terminal, characterized in that: The hinge mechanism comprises a hinge mechanism as claimed in claim 12; further comprising a flexible screen, a left housing and a right housing; a left support plate and a right support plate for supporting the rotation of the flexible screen are respectively installed on the inner sides of the left housing and the right housing, and the left support plate and the right support plate are fixedly connected to the flexible screen; The left housing is fixedly connected to the driving plate of the flip assembly on the left side of each hinge device; the right housing is fixedly connected to the driving plate of the flip assembly on the right side of each hinge device.

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