A rotating mechanism for flexible screen folding and a mobile terminal

Abstract

The present invention relates to a rotating mechanism for flexible screen folding and a mobile terminal, and relates to the field of mechanical rotation of electronic devices; the rotating mechanism includes two symmetrically arranged hinge devices and two flexible screen support plates; the hinge device includes a mounting base, a flipping assembly rotatably arranged on both sides of the mounting base, a synchronous gear set for synchronously rotating the flipping assemblies on both sides, and a damping assembly for forming a damping rotation when the flipping assembly flips; one flexible screen support plate is respectively arranged on both sides of the mounting base; both ends of the flexible screen support plate are respectively rotatably matched with the flipping assemblies on the same side of the two hinge devices; when the hinge device is in a closed state, the flexible screen support plates on both sides form a shape with the upper end close and the lower end far away. The present invention can provide a larger accommodation space for the folding part of the flexible screen and has a better supporting effect on the flexible screen.

Description

Technical Field

[0001] The present invention relates to components of electronic devices, and particularly to a rotating mechanism for folding a flexible screen and a mobile terminal. Background Art

[0002] Flexible display, that is, flexible OLED, is formed by laser peeling and curing of a hard screen, and has the advantages of being bendable, thin and light in weight. With the continuous development of flexible display technology, flexible screens will gradually become a popular trend in downstream terminals. Currently, flexible screens are more applied to traditional terminals such as smart phones, TVs and computer displays. Among them, the highest requirements for the flexible application of flexible screens are currently mainly concentrated in mobile terminals such as smart phones and tablet computers. The reason why the application requirements of flexible screens in mobile terminals are high is that one of the key features of mobile terminals is portability. In order to be portable, the size of mobile terminals needs to be controlled within a certain range. However, in the era of traditional hard screens, the size of mobile terminals limited the screen size. But with the development of flexible screen technology, flexible screens can break through the problem of limited screen size in the era of traditional hard screens.

[0003] Because mobile terminals can fold the flexible screen through a folding design, the size of the mobile terminal and the large screen are perfectly combined. In order to meet the folding requirements of the flexible screen, the key lies in whether the design of the hinge mechanism is reasonable.

[0004] At present, for the hinge mechanism of mobile terminals with flexible screens, in order to achieve synchronous flipping, damping feel, etc. in a limited space, different mechanical components often need to be designed to meet the requirements, and these mechanical components occupy a large amount of installation space. At the same time, when the hinge mechanism is closed, the traditional hinge mechanism will squeeze the folding part of the flexible screen, and over time, it is easy to damage the folding part of the flexible screen, affecting the service life and use effect.

[0005] Taking flexible screen smart phones as an example, there are mainly two folding methods for current flexible screen smart phones: 1. Using the long side of the mobile phone as the folding reference axis; 2. Using the short side of the mobile phone as the folding reference axis. Among them, for flexible screen smart phones with the long side of the mobile phone as the folding reference axis, there is a certain space in the folding reference axis direction of the hinge mechanism, and the installation space of the hinge can be reasonably arranged. However, for flexible screen smart phones with the short side of the mobile phone as the folding reference axis, the space in the folding reference axis direction of the hinge mechanism is limited. The existing folding hinges cannot meet the requirements of installation space under the premise of ensuring folding strength. Summary of the Invention

[0006] The first object of the present invention is to provide a rotating mechanism for folding a flexible screen, which can provide a larger accommodation space for the folding part of the flexible screen and has a better supporting effect on the flexible screen; at the same time, compared with the rotating mechanism of the existing flexible screen mobile terminal, it has fewer components, and the dimensions in the length direction and the thickness direction can be further reduced, meeting the requirements of the mobile terminal for being thin, light, small and compact.

[0007] The technical solution for achieving the first object of the present invention is: the rotating mechanism for folding a flexible screen in the present invention includes two symmetrically arranged hinge devices and two flexible screen support plates; the hinge device includes a mounting base, a flipping assembly rotatably arranged on both sides of the mounting base, a synchronous gear set for synchronously rotating the flipping assemblies on both sides, and a damping assembly for forming a damping rotation when the flipping assembly flips; the flipping assembly includes a driving body, a first flipping body and a second flipping body; the lower end of the first flipping body 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 flipping body forms a sliding compensation fit with the driving body; the lower end of the second flipping body is rotatably connected to the mounting base in a virtual axis manner, and the upper end of the second flipping body is rotatably connected to the driving body; a flexible screen support plate is provided on each side of the mounting base; both ends of the flexible screen support plate correspond to the flipping assemblies on the same side of the two hinge devices respectively; both ends of the flexible screen support plate are rotatably connected to the corresponding driving body, and arc-shaped compensation grooves are provided at both ends of the flexible screen support plate; the arc-shaped compensation grooves at both ends of the flexible screen support plate are in sliding compensation fit with the corresponding first flipping body; when the hinge device is in the closed state, the flexible screen support plates on both sides of the mounting base form a shape with the upper end close and the lower end far away under the guidance of the arc-shaped compensation grooves and the rotation limitation of the driving body.

[0008] Further, it also includes a flexible screen supporting plate; both ends of the flexible screen supporting plate are connected to the mounting bases of the two hinge devices through elastic components respectively; the elastic component includes a lifting chute, a lifting column and a return spring; the lifting chute is arranged on the mounting base, and a first limiting platform is provided at the upper opening of the lifting chute; the upper end of the lifting column extends out of the lifting chute and is fixedly connected to the flexible screen supporting plate, the lower end of the lifting column is provided with a second limiting platform and is slidably arranged in the lifting chute; the return spring is sleeved on the lifting column, and its two ends act on the first limiting platform and the second limiting platform respectively; a lifting part for lifting the flexible screen supporting plate upward when the hinge device is in the open state is provided on the first flipping assembly.

[0009] Further, an arc-shaped slider is provided at the lower end of the second flipping body; an arc-shaped chute corresponding to the arc-shaped slider is provided on the mounting base; the lower end of the second flipping body forms a virtual axis type rotational fit through the cooperation of the arc-shaped slider and the arc-shaped chute; when the hinge device is in the open state, the free end of the arc-shaped slider extends out of the arc-shaped chute; the part where the arc-shaped slider extends out of the arc-shaped chute serves as the lifting part.

[0010] Furthermore, a jacking block is also provided on the above-mentioned flexible screen support plate. The jacking block and the jacking part jack up the flexible screen supporting plate synchronously.

[0011] Furthermore, a plurality of jacking blocks are provided on the above-mentioned flexible screen support plate between the two hinge devices. Thus, a better jacking effect is achieved on the flexible screen supporting plate, effectively preventing local collapse of the flexible supporting plate.

[0012] Furthermore, two lifting chutes are provided on the mounting base of the above-mentioned hinge device; the two lifting chutes are respectively located on both sides of the mounting base; one lifting chute and the lower end of the second flipping body on the same side form a combination; the two combinations are 180° rotationally replicated, and the center point of rotation replication is the midpoint of the connection line of the center points of the two lifting chutes; an elastic component is correspondingly arranged for each lifting chute.

[0013] Furthermore, the above-mentioned lifting chute is a through hole penetrating the mounting base, and a first limiting platform is provided at the upper opening of the through hole; a threaded hole extending downward along the center line is provided on the lifting column; the upper end of the lifting column is inserted from the lower end of the through hole and passes out from the upper opening of the through hole; the flexible supporting plate is fixedly connected to the upper end of the lifting column extending out of the through hole through the cooperation of a screw and the threaded hole.

[0014] Furthermore, the above-mentioned synchronous gear set includes four gears that are sequentially rotationally engaged and four assembly shafts provided on the mounting base; the four gears are respectively rotationally sleeved on the four assembly shafts; the lower end of the first flipping body forms the gear on the corresponding side of the corresponding synchronous gear set; the upper end of the first flipping body and the driving body form a sliding compensation fit that restricts the movement of the first flipping body along the axis direction of the assembly shaft;

[0015] At least one flipping component is correspondingly matched with a damping component; the damping component includes a first damping convex tooth, a second damping convex tooth and a damping spring; first damping convex teeth that rotate coaxially with the gear are provided at both ends of the gear formed at the lower end of the first flipping body; a first damping convex tooth is correspondingly matched with a second damping convex tooth; the assembly shaft passing through the gear formed at the lower end of the first flipping body also passes through the first damping convex tooth, the second damping convex tooth and the damping spring; the end of the assembly shaft close to the mounting base is slidably arranged in the mounting base, and its diameter is larger than the diameter of the hole through which the second damping convex tooth close to the mounting base allows the assembly shaft to pass; an installation bracket is provided at the end of the assembly shaft far from the mounting base; both ends of the damping spring act on the installation bracket and the second damping convex tooth on the side close to the installation bracket respectively; the second damping convex tooth and the first damping convex tooth continuously engage with each other under the action of the damping spring as the flipping component flips and can form a distance change in the axis direction of the assembly shaft.

[0016] Furthermore, a damping component is correspondingly arranged for each flipping component.

[0017] Furthermore, the two second damping convex teeth on the two damping components close to the mounting base are connected into one body by a connecting plate; the two second damping convex teeth on the two damping components far from the mounting base are also connected into one body by a connecting plate; the mounting brackets of the two damping components are also connected into one body by a connecting plate.

[0018] Furthermore, a reinforcing damping spring is sleeved on the assembly shafts of the middle two gears for assembling the synchronous gear set; the two ends of the reinforcing damping spring act on the mounting bracket and the connecting plate connecting the two second damping convex teeth far from the mounting base respectively.

[0019] As a deformation and optimization design, at least one first sleeve column is provided on the plane facing the mounting bracket on the connecting plate connecting the two second damping convex teeth far from the mounting base; a second sleeve column coaxial with the first sleeve column is provided on the plane of the mounting bracket facing the second damping convex teeth; the first sleeve column and the second sleeve column are parallel to the assembly shaft; a reinforcing damping spring is provided between the first sleeve column and the second sleeve column, and the two ends of the reinforcing damping spring are sleeved on the first sleeve column and the second sleeve column respectively and act on the mounting bracket and the connecting plate connecting the two second damping convex teeth far from the mounting base.

[0020] Furthermore, the flexible screen support plate and the driving body are rotationally connected in a virtual axis manner.

[0021] The second object of the present invention is to provide a mobile terminal adopting the above-mentioned rotating mechanism. The mobile terminal can achieve a better accommodating and supporting effect on the flexible screen through the above-mentioned rotating mechanism, and at the same time, the thickness can be reduced to a certain extent.

[0022] The technical solution for achieving the second object of the present invention is: the mobile terminal in the present invention includes the above-mentioned rotating mechanism for folding a flexible screen; it further includes a hinge mounting seat, a flexible screen, a left housing and a right housing; two hinge devices are symmetrically arranged at both ends of the hinge mounting seat, and the hinge devices are fixedly connected to the hinge mounting seat through their mounting bases; left support plates and right support plates 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 plates and the right support plates are fixedly connected to the flexible screen; the left housing is fixedly connected to the driving body of the flipping assembly on the left side of each hinge device; the right housing is fixedly connected to the driving body of the flipping assembly on the right side of each hinge device.

[0023] The present invention has positive effects: (1) In the present invention, the flexible screen support plate directly participates in the flipping cooperation of the flipping assembly (in the existing technology, the flexible screen support plate is assembled after the hinge device is installed and does not participate in the flipping cooperation of the flipping assembly). This effectively reduces the components of the flipping assembly. Moreover, by participating in the flipping cooperation, under the guidance of the arc-shaped compensation groove and the rotation limitation of the driving body, the flexible screen support plates on both sides of the installation base directly form a shape with the upper end close and the lower end far away, providing a larger accommodation space for the folding part of the flexible screen and effectively avoiding squeezing the folding part of the flexible screen.

[0024] (3) Through the mutual cooperation of the flexible screen supporting plate, the elastic component and the jacking part, the present invention can achieve better support and accommodation effects on the folding part of the flexible screen; specifically, the support effect is that when the hinge device is in the open state, the jacking part overcomes the pulling force of the elastic component to jack up the flexible screen supporting plate to make it flush with the flexible screen support plate, so as to achieve a comprehensive supporting effect on the folding part of the flexible screen; specifically, the accommodation effect is that when the hinge device is in the closed state, the jacking part no longer jacks up the flexible screen supporting plate, and the flexible screen supporting plate moves downward under the action of the pulling force of the elastic component, thereby further providing an accommodation space for the folding part of the flexible screen.

[0025] (4) The arrangement of the jacking part and the jacking block in the present invention can better jack up and support the flexible screen supporting plate, prevent local collapse of the flexible screen support plate, and thus improve the flatness of the unfolded folding part of the flexible screen.

[0026] (5) In the present invention, by correspondingly providing two elastic components on the installation base of the hinge device, the return ability of the flexible screen supporting plate can be improved; moreover, the way that the two elastic components are 180° rotationally replicated is based on the premise that the second flipping body of the flipping assembly meets the requirement of size reduction in the width direction of the rotating mechanism. Their position settings can provide a more stable supporting and pulling effect on the flexible screen supporting plate, effectively preventing the problem of the flexible screen support plate tilting to one side.

[0027] (6) In the present invention, the synchronous gear group and the damping component adopt an integrated design, greatly reducing the components. At the same time, through the sliding compensation cooperation between the upper end of the first flipping body and the driving body to limit the movement of the first flipping body along the axis of the assembly shaft, the assembly shaft forms a clever floating fixed installation. Among them, the synchronous gear group no longer needs to use a cage, and the second damping convex teeth on both sides can form a damping cooperation and also play the role of a cage, and the damping component no longer needs to be fixedly installed on the hinge mounting seat.

[0028] (7) In the present invention, through the cooperation of two groups of first damping convex teeth and second damping convex teeth of the damping component, the damping feel can be effectively improved; and by increasing the number of damping components, the damping effect can be further enhanced, and by strengthening the damping spring, the damping effect can be further improved.

[0029] (8) By connecting the connecting plate of the second damping convex tooth and the connecting plate of the mounting bracket, the present invention can form the damping component into an integral component, with consistent damping cooperation and better feel. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to make the content of the present invention easier to be clearly understood, the following further describes the present invention in detail according to specific embodiments in conjunction with the drawings, where

[0031] Figure 1 is a schematic structural diagram of the rotating mechanism for flexible screen folding in the present invention;

[0032] Figure 2 is a schematic diagram of the cooperation between the hinge device and the flexible screen support plate when the rotating mechanism for flexible screen folding in the present invention is in the fully opened state;

[0033] Figure 3 is a schematic diagram of the cooperation between the hinge device and the flexible screen support plate when the rotating mechanism for flexible screen folding in the present invention is in the fully closed state;

[0034] Figure 4 is a schematic diagram of the cooperation between the hinge device and the flexible screen support plate when the rotating mechanism for flexible screen folding in the present invention is in the opening process;

[0035] Figure 5 is a schematic structural diagram of the flexible screen support plate in the present invention;

[0036] Figure 6 is a schematic diagram of the state where the flexible screen supporting plate is lifted in the present invention;

[0037] Figure 7 is a schematic diagram of the state where the flexible screen supporting plate moves downward under the action of the elastic component in the present invention;

[0038] Figure 8 is a cross-sectional view of the damping component in the present invention;

[0039] Figure 9 is a schematic structural diagram of the hinge device in Embodiment 1 of the present invention;

[0040] Figure 10 is a schematic structural diagram of the hinge device in Embodiment 2 of the present invention;

[0041] Figure 11 is a schematic structural diagram of the mobile terminal in the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0042] (Embodiment 1)

[0043] See Figures 1 to 9, the rotation mechanism for flexible screen folding in the present invention includes two symmetrically arranged hinge devices 1 and two flexible screen support plates 2; the hinge device 1 includes a mounting base 11, flipping components 12 rotatably arranged on both sides of the mounting base 11, a synchronous gear set 13 for synchronously rotating the flipping components 12 on both sides, and a damping component 14 for forming a damping rotation when the flipping components 12 flip; the flipping component 12 includes a driving body 121, a first flipping body 122 and a second flipping body 123; the lower end of the first flipping body 122 is rotatably connected to the mounting base 11 and is used to drive the gear on the corresponding side of the synchronous gear set 13, and the upper end of the first flipping body 122 forms a sliding compensation fit with the driving body 121; the lower end of the second flipping body 123 forms a virtual axis type rotational connection with the mounting base 11, and the upper end of the second flipping body 123 is rotatably connected to the driving body 121; one flexible screen support plate 2 is provided on each side of the mounting base 11; both ends of the flexible screen support plate 2 correspond to the flipping components 12 on the same side of the two hinge devices 1; both ends of the flexible screen support plate 2 are rotatably connected to the corresponding driving body 121, and arc-shaped compensation grooves 21 are provided at both ends of the flexible screen support plate 2; the arc-shaped compensation grooves 21 at both ends of the flexible screen support plate 2 form a sliding compensation fit with the corresponding first flipping body 122, and the specific sliding compensation fit method is: a pin shaft is provided on the first flipping body 122, and the pin shaft is inserted into the arc-shaped compensation groove 21 of the corresponding flexible screen support plate 2.

[0044] When the hinge device 1 is in the closed state, the flexible screen support plates 2 on both sides of the mounting base 11 form a shape with the upper end close and the lower end far away under the guidance of the arc-shaped compensation groove 21 and the rotation limitation of the driving body 121.

[0045] It also includes a flexible screen supporting plate 3; both ends of the flexible screen supporting plate 3 are respectively connected to the mounting bases 11 of the two hinge devices 1 through elastic components 4; the elastic component 4 includes a lifting chute 41, a lifting column 42 and a return spring 43; the lifting chute 41 is arranged on the mounting base 11, and a first limiting platform is provided at the upper opening of the lifting chute 41; the upper end of the lifting column 42 extends out of the lifting chute 41 and is fixedly connected to the flexible screen supporting plate 3, the lower end of the lifting column 42 is provided with a second limiting platform and is slidably arranged in the lifting chute 41; the return spring 43 is sleeved on the lifting column 42, and its two ends respectively act on the first limiting platform and the second limiting platform.

[0046] An arc-shaped slider is provided at the lower end of the second flipping body 123; an arc-shaped chute corresponding to the arc-shaped slider is provided on the mounting base 11; the lower end of the second flipping body 123 forms a virtual axis type rotational fit through the cooperation of the arc-shaped slider and the arc-shaped chute; when the hinge device 1 is in the open state, the free end of the arc-shaped slider extends out of the arc-shaped chute; the part where the arc-shaped slider extends out of the arc-shaped chute serves as a lifting part 123-1 for lifting the flexible screen supporting plate 3 upward.

[0047] The flexible screen support plate 2 is also provided with a jacking block 22. The jacking block 22 and the jacking part 123-1 jack up the flexible screen supporting plate 3 synchronously.

[0048] A plurality of jacking blocks 22 are provided between the two hinge devices 1 on the flexible screen support plate 2. Thus, a better jacking effect on the flexible screen supporting plate 3 is achieved, effectively preventing local collapse of the flexible supporting plate 3.

[0049] Two lifting chutes 41 are provided on the mounting base 11 of the hinge device 1; the two lifting chutes 41 are respectively located on both sides of the mounting base 11; one lifting chute 41 and the lower end of the second flipping body 123 on the same side form a combination; the two combinations are rotationally replicated at 180°, and the center point of the rotational replication is the midpoint of the center line connecting the centers of the two lifting chutes 41; each lifting chute 41 is correspondingly provided with an elastic component 4.

[0050] The lifting chute 41 is a through hole penetrating the mounting base 11, and a first limiting platform is provided at the upper opening of the through hole; a threaded hole extending downward along the center line is provided on the lifting column 42 from its upper end face; the upper end of the lifting column 42 is inserted into the through hole from the lower end of the through hole and passes through the upper opening of the through hole; the flexible supporting plate 3 is fixedly connected to the upper end of the lifting column 42 extending out of the through hole through the cooperation of a screw and the threaded hole.

[0051] The synchronous gear set 13 includes four gears that are sequentially rotationally engaged and four assembly shafts 131 provided on the mounting base 11; the four gears are respectively rotationally sleeved on the four assembly shafts 131; the lower end of the first flipping body 122 forms the gear on the corresponding side of the corresponding synchronous gear set 13; the upper end of the first flipping body 122 and the driving body 121 form a sliding compensation fit that restricts the first flipping body 122 from moving along the axis direction of the assembly shaft 131.

[0052] A damping component 14 is correspondingly provided for each flipping component 12; the damping component 14 includes a first damping convex tooth 141, a second damping convex tooth 142, a damping spring 143 and a mounting bracket 144; both ends of the gear formed at the lower end of the first flipping body 122 are provided with first damping convex teeth 141 that rotate coaxially with the gear; one first damping convex tooth 141 cooperates with one second damping convex tooth 142 correspondingly; the assembly shaft 131 of the gear formed at the lower end of the first flipping body 122 passes through the first damping convex tooth 141, the second damping convex tooth 142 and the damping spring 143 at the same time; one end of the assembly shaft 131 close to the mounting base 11 is slidably arranged in the mounting base 11, and its diameter is larger than the diameter of the hole for the assembly shaft 131 to pass through in the second damping convex tooth 142 close to the mounting base 11; a mounting bracket 144 is provided at the end of the assembly shaft 131 away from the mounting base 11; both ends of the damping spring 143 act on the mounting bracket 144 and the second damping convex tooth 142 on the side close to the mounting bracket 144 respectively; the second damping convex tooth 142 and the first damping convex tooth 141 continuously engage with each other under the action of the damping spring 143 as the flipping component 12 flips and can form a distance change in the axial direction of the assembly shaft 131, thereby forming a damping force.

[0053] The two second damping convex teeth 142 on the two damping components 14 close to the mounting base 11 are connected into one body by a connecting plate; the two second damping convex teeth 142 on the two damping components 14 away from the mounting base 11 are also connected into one body by a connecting plate; the mounting brackets 144 of the two damping components 14 are also connected into one body by a connecting plate.

[0054] On the connecting plate connecting the two second damping convex teeth 142 away from the mounting base 11, two first sleeve columns 145 are provided on the plane facing the mounting bracket 144; two second sleeve columns 146 corresponding to the first sleeve columns 145 one by one and arranged coaxially are provided on the plane of the mounting bracket 144 facing the second damping convex tooth 143; the first sleeve columns 145 and the second sleeve columns 146 are parallel to the assembly shaft 131; a reinforcing damping spring 147 is provided between the first sleeve columns 145 and the second sleeve columns 146, and both ends of the reinforcing damping spring 147 are sleeved on the first sleeve columns 145 and the second sleeve columns 146 respectively and act on the mounting bracket 144 and the connecting plate connecting the two second damping convex teeth 142 away from the mounting base 11 respectively.

[0055] The flexible screen support plate 2 is rotationally connected with the driving body 121 in a virtual axis manner.

[0056] See Figure 11, in the present invention, the mobile terminal includes the above-mentioned rotation mechanism for flexible screen folding; it further includes a hinge mounting base 5, a flexible screen 6, a left housing 7 and a right housing 8; two hinge devices 1 are symmetrically arranged at both ends of the hinge mounting base 5, and the hinge device 1 is fixedly connected to the hinge mounting base 5 through its mounting base 11; 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 7 and the right housing 8, and the left support plate and the right support plate are fixedly connected to the flexible screen; the left housing 7 is fixedly connected to the driving body 121 of the flipping assembly 12 on the left side of each hinge device 1; the right housing 8 is fixedly connected to the driving body 121 of the flipping assembly 12 on the right side of each hinge device 1.

[0057] The working process of the present invention is as follows:

[0058] Rotation mechanism from the closed state to the open state: When the left housing 7 and / or the right housing 8 is opened, the driving body 121 is driven to flip, and the driving body 121 drives the first flipping body 122 and the second flipping body 123 to flip. As the flipping progresses, the pin shaft on the first flipping body 122 moves from the lowest end to the uppermost end of the arc-shaped compensation groove 21. As it moves, it guides the lower end of the flexible screen support plate 2 to approach and the upper end to move away until the flexible screen support plate 2 is parallel to the left housing or the right housing; at the same time, as the flipping progresses, the jacking portion 123-1 and the jacking block 22 act on the flexible screen supporting plate 3, and overcome the pulling force of the elastic component 4 to jack up the flexible screen supporting plate 3 and support the folding portion of the flexible screen.

[0059] Rotation mechanism from the open state to the closed state: When the left housing 7 and / or the right housing 8 is closed, the driving body 121 is driven to flip, and the driving body 121 drives the first flipping body 122 and the second flipping body 123 to flip. As the flipping progresses, the pin shaft on the first flipping body 122 moves from the uppermost end to the lowest end of the arc-shaped compensation groove 21. As it moves, it guides the lower end of the flexible screen support plate 2 to move away and the upper end to approach, thereby forming an enlarged space that can fully accommodate the folding portion of the flexible screen; at the same time, as the flipping progresses, the jacking portion 123-1 and the jacking block 22 flip downward and gradually stop acting on the flexible screen supporting plate 3, and the elastic component 4 pulls the flexible screen supporting plate 3 downward to further provide space for accommodating the folding portion of the flexible screen.

[0060] At the same time, as the second flipping plate 123 flips, the first damping convex teeth 141 and the second damping convex teeth 142 cooperate, and the second damping convex teeth 142 close to the mounting base 11 urge the corresponding assembly shaft 131 to slide into the mounting base 11. The inward sliding of the assembly shaft 131 will drive the compression of the damping spring 143 and the enhanced damping spring 147, thereby urging the second damping convex teeth 142 far from the mounting base 11 to engage with the corresponding first damping convex teeth 141.

[0061] (Embodiment 2)

[0062] See Figure 10 In the rotation mechanism for folding the flexible screen in the present invention, a reinforcing damping spring 147 is sleeved on the assembly shaft 131 of the middle two gears for assembling the synchronous gear set 13; both ends of the reinforcing damping spring 147 act on the mounting bracket 144 and the connecting plate connecting the two second damping teeth 142 away from the mounting base 11 respectively.

[0063] Other technical features are the same as those in Embodiment 1.

[0064] The specific embodiments described above further elaborate on the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A rotating mechanism for flexible screen folding, comprising two symmetrically arranged hinge devices and two flexible screen support plates; the hinge device includes a mounting base, a flipping assembly rotatably arranged on both sides of the mounting base, a synchronous gear set for synchronously rotating the flipping assemblies on both sides, and a damping assembly for forming a damped rotation when the flipping assembly flips. Characterized in that: The flipping assembly includes a driving body, a first flipping body and a second flipping body; the lower end of the first flipping body 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 flipping body forms a sliding compensation fit with the driving body; the lower end of the second flipping body forms a virtual axis type rotational connection with the mounting base, and the upper end of the second flipping body is rotatably connected to the driving body; one flexible screen support plate is provided on each side of the mounting base; both ends of the flexible screen support plate correspond to the flipping assemblies on the same side of the two hinge devices; both ends of the flexible screen support plate are rotatably connected to the corresponding driving body, and arc-shaped compensation grooves are provided at both ends of the flexible screen support plate; the arc-shaped compensation grooves at both ends of the flexible screen support plate form a sliding compensation fit with the corresponding first flipping body; when the hinge device is in the closed state, the flexible screen support plates on both sides of the mounting base form a shape with the upper end close and the lower end far away under the guidance of the arc-shaped compensation grooves and the rotation limitation of the driving body. It also includes a flexible screen supporting plate; both ends of the flexible screen supporting plate are connected to the mounting bases of the two hinge devices through elastic components respectively; the elastic component includes a lifting chute, a lifting column and a return spring; the lifting chute is arranged on the mounting base, and a first limiting platform is provided at the upper opening of the lifting chute; the upper end of the lifting column extends out of the lifting chute and is fixedly connected to the flexible screen supporting plate, the lower end of the lifting column is provided with a second limiting platform and is slidably arranged in the lifting chute; the return spring is sleeved on the lifting column, and its two ends act on the first limiting platform and the second limiting platform respectively; a lifting part for lifting the flexible screen supporting plate upward is provided on the first flipping body when the hinge device is in the open state. An arc-shaped slider is provided at the lower end of the second flipping body; an arc-shaped chute corresponding to the arc-shaped slider is provided on the mounting base; the lower end of the second flipping body forms a virtual axis type rotational fit through the cooperation of the arc-shaped slider and the arc-shaped chute; when the hinge device is in the open state, the free end of the arc-shaped slider extends out of the arc-shaped chute; the part where the arc-shaped slider extends out of the arc-shaped chute serves as the lifting part. Two lifting chutes are provided on the mounting base of the hinge device; the two lifting chutes are respectively located on both sides of the mounting base; one lifting chute forms a combination with the lower end of the second flipping body on the same side; the two combinations are 180° rotationally replicated, and the center of rotation replication is the midpoint of the connection line of the centers of the two lifting chutes; each lifting chute is correspondingly provided with an elastic component.

2. A rotating mechanism for flexible screen folding according to claim 1, Characterized in that: A lifting block is also provided on the flexible screen support plate.

3. A rotating mechanism for flexible screen folding according to claim 1, Characterized in that: The lifting sliding groove is a through hole penetrating the mounting base, and a first limiting platform is provided at the upper opening of the through hole; a threaded hole extending downward along the center line is provided on the lifting column; the upper end of the lifting column is inserted from the lower end of the through hole and passes out from the upper opening of the through hole; the flexible screen supporting plate is fixedly connected to the upper end of the lifting column extending out of the through hole through the cooperation of screws and the threaded hole.

4. A rotating mechanism for flexible screen folding according to claim 1 or 2 or 3, characterized in that: The synchronous gear set includes four gears that are sequentially rotationally engaged and four assembly shafts provided on the mounting base; the four gears are respectively rotationally sleeved on the four assembly shafts; the lower end of the first flipping body forms the gear on the corresponding side of the corresponding synchronous gear set; the upper end of the first flipping body and the driving body form a sliding compensation fit that restricts the first flipping body from moving along the axis direction of the assembly shaft. At least one flipping assembly is correspondingly matched with a damping assembly; the damping assembly includes a first damping convex tooth, a second damping convex tooth and a damping spring; both ends of the gear formed at the lower end of the first flipping body are provided with first damping convex teeth that rotate coaxially with the gear; one first damping convex tooth is correspondingly matched with one second damping convex tooth; the assembly shaft passing through the gear formed at the lower end of the first flipping body also passes through the first damping convex tooth, the second damping convex tooth and the damping spring; one end of the assembly shaft close to the mounting base is slidably arranged in the mounting base, and its diameter is larger than the diameter of the hole for the assembly shaft to pass through the second damping convex tooth close to the mounting base; the other end of the assembly shaft away from the mounting base is provided with a mounting bracket; both ends of the damping spring act on the mounting bracket and the second damping convex tooth on the side close to the mounting bracket respectively; the second damping convex tooth and the first damping convex tooth continuously engage under the action of the damping spring as the flipping assembly flips and can form a distance change in the axis direction of the assembly shaft.

5. A rotating mechanism for flexible screen folding according to claim 4, characterized in that: Each flipping assembly is correspondingly provided with a damping assembly.

6. A rotating mechanism for flexible screen folding according to claim 5, characterized in that: The two second damping convex teeth on the two damping assemblies close to the mounting base are connected into one body through a connecting plate; the two second damping convex teeth on the two damping assemblies away from the mounting base are also connected into one body through a connecting plate; the mounting brackets of the two damping assemblies are also connected into one body through a connecting plate.

7. A rotating mechanism for flexible screen folding according to claim 6, characterized in that: A strengthening damping spring is sleeved on the assembly shaft for assembling the middle two gears of the synchronous gear set; both ends of the strengthening damping spring act on the mounting bracket and the connecting plate connecting the two second damping convex teeth away from the mounting base respectively.

8. A rotating mechanism for flexible screen folding according to claim 6, characterized in that: On the connecting plate connecting two second damping convex teeth far away from the mounting base, at least one first sleeve column is provided on the plane facing the mounting frame; on the plane of the mounting frame facing the second damping convex teeth, a second sleeve column coaxial with the first sleeve column is provided; the first sleeve column and the second sleeve column are parallel to the assembly shaft; a reinforcing damping spring is provided between the first sleeve column and the second sleeve column, and both ends of the reinforcing damping spring are sleeved on the first sleeve column and the second sleeve column, and respectively act on the mounting frame and the connecting plate connecting two second damping convex teeth far away from the mounting base.

9. A rotating mechanism for flexible screen folding according to claim 1, characterized in that: The flexible screen support plate and the driving body are rotationally connected in a virtual axis manner.

10. A mobile terminal, characterized in that: It includes a rotating mechanism for flexible screen folding according to claim 1 or 2 or 3; it further includes a hinge mounting seat, a flexible screen, a left housing and a right housing; two hinge devices are symmetrically arranged at both ends of the hinge mounting seat, and the hinge devices are fixedly connected to the hinge mounting seat through their mounting bases; on the inner sides of the left housing and the right housing, a left support plate and a right support plate for supporting the rotation of the flexible screen are respectively installed, 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 body of the flipping assembly on the left side of each hinge device; the right housing is fixedly connected to the driving body of the flipping assembly on the right side of each hinge device.

11. A mobile terminal, characterized in that: It includes a rotating mechanism for flexible screen folding according to claim 4; it further includes a hinge mounting seat, a flexible screen, a left housing and a right housing; two hinge devices are symmetrically arranged at both ends of the hinge mounting seat, and the hinge devices are fixedly connected to the hinge mounting seat through their mounting bases; on the inner sides of the left housing and the right housing, a left support plate and a right support plate for supporting the rotation of the flexible screen are respectively installed, 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 body of the flipping assembly on the left side of each hinge device; the right housing is fixedly connected to the driving body of the flipping assembly on the right side of each hinge device.

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