1. A folding hinge has a mounting base; the method is characterized in that: the left side and the right side of the mounting base are symmetrically provided with overturning components; an even-number-stage gear set is arranged on the mounting base; the overturning assembly comprises a driving block, a first rotating plate, a second rotating plate and a damping piece for forming damping rotation when the overturning assembly overturns; one end of the first rotating plate is rotatably connected with the mounting base, and the other end of the first rotating plate is rotatably connected with the driving block; one end of the second rotating plate is a compensation part, the other end of the second rotating plate is a driving part, and an arc part expanding outwards is arranged between the compensation part and the driving part; the compensation part of the second rotating plate is matched with the driving block in a sliding compensation way; the driving parts of the second rotating plates on the left side and the right side of the mounting base are respectively in transmission fit with the gears on the two sides of the even-level gear set, so that the turning plate assemblies on the two sides form synchronous turning through the even-level gear set; when the driving block is in a closed state of the folding hinge, one end of the first rotating plate, which is in rotating connection with the driving block, is close to each other, and one end of the first rotating plate, which is in rotating connection with the mounting base, is far away from each other; and an outward-expanding cavity is formed between the arc parts of the second rotating plates at the left side and the right side of the mounting base.

2. A folding hinge according to claim 1, characterized in that: the first rotating plate is rotatably connected with the mounting base through a compensation sliding block; the mounting base and the outer side of the compensation sliding block form virtual shaft type rotation fit; one end of the first rotating plate, which is not rotationally connected with the driving block, forms virtual shaft type rotation fit with the inner side of the compensation sliding block.

3. A folding hinge according to claim 2, characterized in that: the compensation sliding block is provided with a first limiting sliding groove; a first limiting block is arranged at one end of the first rotating plate, which is in rotating fit with the compensation sliding block; the first limiting block is arranged in the first limiting sliding groove in a sliding manner along with the relative rotation of the first rotating plate and the compensation sliding block; when the driving block is in a closed state, the first limiting block is positioned at one end of the first limiting sliding groove and forms limiting fit with the first limiting sliding groove to limit the first rotating plate to continuously turn towards the closing direction of the driving block.

4. A folding hinge according to claim 1, characterized in that: the driving block is provided with an arc-shaped compensation chute; the compensation part of the second rotating plate is arranged in the arc-shaped compensation chute in a sliding manner.

5. A folding hinge according to claim 4, characterized in that: the driving block is provided with a second limiting sliding groove arranged along the extension direction of the arc-shaped compensation sliding groove; the compensation part of the second rotating plate is provided with a second limiting block; the second limiting block is arranged in the second limiting sliding groove in a sliding manner along with the relative rotation of the second rotating plate and the driving block; when the driving block is in a completely opened state, the second limiting block is positioned at one end of the second limiting sliding groove and forms limiting fit with the second limiting sliding groove to limit the second rotating plate to continuously turn towards the opening direction of the driving block.

6. A folding hinge according to claim 1, characterized in that: the damping part comprises a first damping convex tooth which is arranged on the driving part of the second rotating plate and rotates coaxially with the driving part, and a second damping convex tooth which seeks to be meshed with the first damping convex tooth under the action of a damping spring; along with the rotation of the turnover assembly, the first damping convex teeth and the second damping convex teeth on the corresponding sides form damping rotation through distance difference formed in the continuous meshing process.

7. A folding hinge according to claim 2, characterized in that: both sides of the compensation slide block form virtual shaft type rotation fit with the mounting base; both sides of one end of the first rotating plate, which is not rotationally connected with the driving block, form virtual shaft type rotation fit with both sides of the compensation sliding block.

8. A folding hinge according to claim 2, characterized in that: the first rotating plate is rotatably connected with the driving block through a rotating shaft.

9. A folding hinge according to claim 6, characterized in that: the even-level gear set is rotationally arranged on the mounting base; an output shaft of the gear in transmission fit with the driving part of the second rotating plate sequentially penetrates through the driving part, the second damping convex teeth and the damping spring; the damping spring acts on the mounting base and the second damping convex teeth respectively; the output shaft of the gear in transmission fit with the driving part of the second rotating plate and the driving part of the second rotating plate form circumferential transmission fit; the output shaft of the gear in transmission fit with the driving part of the second rotating plate can rotate in the second damping convex teeth and the damping springs without driving the second damping convex teeth and the damping springs to rotate.

10. A folding hinge according to claim 9, characterized in that: the mounting base comprises a reference body, a retainer and a limiting frame; the reference body is rotationally connected with the first rotating plate; the retainer and the reference body are fixedly arranged; the even-level gear set is rotationally arranged on the retainer, and the limiting frame is fixedly arranged on the retainer; an output shaft of a gear in transmission fit with the driving part of the second rotating plate sequentially penetrates through the driving part, the second damping convex teeth and the damping spring and then is rotationally connected with the limiting frame; two ends of the damping spring respectively act on the limiting frame and the second damping convex teeth; the second damping convex teeth positioned on the left side and the right side of the mounting base are connected into a whole through a connecting rod.

11. The hinge mechanism for the folding screen is characterized in that: comprising a hinge mount, a plurality of folding hinges of claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10, a support plate for supporting a folded portion of the flexible screen; the plurality of folding hinges are fixedly arranged on the hinge mounting seat along the extending direction of the hinge mounting seat; the supporting plates are arranged between the first rotating plates on the same sides of the adjacent folding hinges, and the two ends of each supporting plate are fixedly connected with the corresponding first rotating plates respectively.

12. A mobile terminal, characterized by: a hinge mechanism for a folding screen comprising the foldable screen of claim 11; 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 machine shell is fixedly connected with a driving block of the turning component on the left side of each folding hinge; the right side machine shell is fixedly connected with the driving block of the turnover assembly on the right side of each folding hinge.

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 invent a flexible screen, apply the flexible screen to the mobile terminal, and through a folding design, the mobile terminal can meet the requirements of people in carrying and can expand the screen of the mobile terminal through unfolding when in use. To achieve this above requirement, it is critical whether the design of the hinge mechanism is reasonable.

The hinge mechanism of the mobile terminal adopting the folding screen at present can be complex in mechanical structure, 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, 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 folding screen, and if the accommodating space is too small, the hinge mechanism and the folding part are extruded and collided easily, so that the service life of the folding screen is influenced.

Disclosure of Invention

A first object of the present invention is to provide a folding hinge which can form a large cavity when folded and furled.

The technical scheme for realizing the first purpose of the invention is as follows: the folding hinge is provided with a mounting base; the left side and the right side of the mounting base are symmetrically provided with overturning components; an even-number-stage gear set is arranged on the mounting base; the overturning assembly comprises a driving block, a first rotating plate, a second rotating plate and a damping piece for forming damping rotation when the overturning assembly overturns; one end of the first rotating plate is rotatably connected with the mounting base, and the other end of the first rotating plate is rotatably connected with the driving block; one end of the second rotating plate is a compensation part, the other end of the second rotating plate is a driving part, and an arc part expanding outwards is arranged between the compensation part and the driving part; the compensation part of the second rotating plate is matched with the driving block in a sliding compensation way; the driving parts of the second rotating plates on the left side and the right side of the mounting base are respectively in transmission fit with the gears on the two sides of the even-level gear set, so that the turning plate assemblies on the two sides form synchronous turning through the even-level gear set; when the driving block is in a closed state of the folding hinge, one end of the first rotating plate, which is in rotating connection with the driving block, is close to each other, and one end of the first rotating plate, which is in rotating connection with the mounting base, is far away from each other; and an outward-expanding cavity is formed between the arc parts of the second rotating plates at the left side and the right side of the mounting base.

The first rotating plate is rotatably connected with the mounting base through a compensation sliding block; the mounting base and the outer side of the compensation sliding block form virtual shaft type rotation fit; one end of the first rotating plate, which is not rotationally connected with the driving block, forms virtual shaft type rotation fit with the inner side of the compensation sliding block.

The compensation slide block is provided with a first limiting chute; a first limiting block is arranged at one end of the first rotating plate, which is in rotating fit with the compensation sliding block; the first limiting block is arranged in the first limiting sliding groove in a sliding manner along with the relative rotation of the first rotating plate and the compensation sliding block; when the driving block is in a closed state, the first limiting block is positioned at one end of the first limiting sliding groove and forms limiting fit with the first limiting sliding groove to limit the first rotating plate to continuously turn towards the closing direction of the driving block.

The driving block is provided with an arc-shaped compensation chute; the compensation part of the second rotating plate is arranged in the arc-shaped compensation chute in a sliding manner.

The driving block is provided with a second limiting sliding chute arranged along the extension direction of the arc-shaped compensation sliding chute; the compensation part of the second rotating plate is provided with a second limiting block; the second limiting block is arranged in the second limiting sliding groove in a sliding manner along with the relative rotation of the second rotating plate and the driving block; when the driving block is in a completely opened state, the second limiting block is positioned at one end of the second limiting sliding groove and forms limiting fit with the second limiting sliding groove to limit the second rotating plate to continuously turn towards the opening direction of the driving block.

The damping part comprises a first damping convex tooth which is arranged on the driving part of the second rotating plate and rotates coaxially with the driving part, and a second damping convex tooth which seeks to be meshed with the first damping convex tooth under the action of a damping spring; along with the rotation of the turnover assembly, the first damping convex teeth and the second damping convex teeth on the corresponding sides form damping rotation through distance difference formed in the continuous meshing process.

Both sides of the compensation slide block form virtual shaft type rotation fit with the mounting base; both sides of one end of the first rotating plate, which is not rotationally connected with the driving block, form virtual shaft type rotation fit with both sides of the compensation sliding block.

The first rotating plate is rotatably connected with the driving block through a rotating shaft.

The even-level gear set is rotationally arranged on the mounting base; an output shaft of the gear in transmission fit with the driving part of the second rotating plate sequentially penetrates through the driving part, the second damping convex teeth and the damping spring; the damping spring acts on the mounting base and the second damping convex teeth respectively; the output shaft of the gear in transmission fit with the driving part of the second rotating plate and the driving part of the second rotating plate form circumferential transmission fit; the output shaft of the gear in transmission fit with the driving part of the second rotating plate can rotate in the second damping convex teeth and the damping springs without driving the second damping convex teeth and the damping springs to rotate.

The mounting base comprises a reference body, a retainer and a limiting frame; the reference body is rotationally connected with the first rotating plate; the retainer and the reference body are fixedly arranged; the even-level gear set is rotationally arranged on the retainer, and the limiting frame is fixedly arranged on the retainer; an output shaft of a gear in transmission fit with the driving part of the second rotating plate sequentially penetrates through the driving part, the second damping convex teeth and the damping spring and then is rotationally connected with the limiting frame; two ends of the damping spring respectively act on the limiting frame and the second damping convex teeth; the second damping convex teeth positioned on the left side and the right side of the mounting base are connected into a whole through a connecting rod.

A second object of the present invention is to provide a hinge mechanism for a foldable screen, which has a simple structure, is stable and efficient in operation, and can provide a large accommodating space for a folding portion of the foldable screen, thereby reducing or preventing squeezing and collision of the folding portion of the foldable screen, and thus effectively protecting the folding portion of the foldable screen.

The technical scheme for realizing the second purpose of the invention is as follows: the hinge mechanism for the folding screen comprises a hinge mounting seat, a plurality of folding hinges and a support plate, wherein the support plate is used for supporting the folding part of the flexible screen; the plurality of folding hinges are fixedly arranged on the hinge mounting seat along the extending direction of the hinge mounting seat; the supporting plates are arranged between the first rotating plates on the same sides of the adjacent folding hinges, and the two ends of each supporting plate are fixedly connected with the corresponding first rotating plates respectively.

A third object of the present invention is to provide a mobile terminal employing the hinge mechanism for a foldable screen, which can effectively reduce or even avoid squeezing and collision of the folded portion of the flexible screen, and has a prominent folding hand feeling.

The technical scheme for realizing the third purpose of the invention is as follows: the mobile terminal comprises the hinge mechanism for the folding screen; 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 machine shell is fixedly connected with a driving block of the turning component on the left side of each folding hinge; the right side machine shell is fixedly connected with the driving block of the turnover assembly on the right side of each folding hinge.

The invention has the positive effects that: (1) according to the folding hinge, one ends of the first rotating plates, which are rotatably connected with the mounting base, are far away from each other, and an outwards expanded accommodating cavity is formed between the arc-shaped parts of the second rotating plates on two sides to increase the accommodating space provided for the folding part of the folding screen, so that the extrusion and collision of the folding hinge on the folding part of the folding screen are reduced or avoided, and the folding part of the folding screen is effectively protected; meanwhile, the invention has simple structure and stable operation.

(2) According to the foldable screen, the lower end of the first rotating plate is rotatably connected with the mounting base through the compensation sliding block, so that the outward expansion angle of the lower end of the first rotating plate can be increased, and a larger accommodating space is provided for the folding part of the foldable screen.

(3) The first limiting chute is in limiting fit with the first limiting block, so that the driving block can be ensured to be vertical, and the phenomenon that the driving block is closed to rotate excessively is avoided.

(4) The problem of over-rotation of the second rotating plate during opening can be effectively solved through the matching of the second limiting chute and the second limiting block.

(5) The damping piece can lock the overturning assembly in the overturning process, so that the overturning hand feeling is improved.

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 view of the folding hinge of the present invention in a fully open position;

FIG. 2 is a schematic view of the folding hinge of the present invention in a one hundred and thirty degree open position;

FIG. 3 is a schematic view of the folding hinge of the present invention in a closed position;

FIG. 4 is a schematic structural view of a first rotating plate according to the present invention;

FIG. 5 is a schematic structural view of a second rotating plate according to the present invention;

FIG. 6 is a schematic structural diagram of a driving block according to the present invention;

FIG. 7 is a schematic structural diagram of a compensating slide block according to the present invention;

FIG. 8 is a schematic structural view of the hinge mechanism for a foldable screen of the present invention in a fully opened position;

FIG. 9 is a schematic view of the hinge mechanism for a foldable screen of the present invention in a one hundred and thirty degree open position;

FIG. 10 is a schematic structural view of a hinge mechanism for a foldable screen according to the present invention in a closed state;

FIG. 11 is a front view of the hinge mechanism for a folding screen according to the present invention in a closed state;

fig. 12 is a schematic structural view of the mobile terminal in a fully opened state according to the present invention;

FIG. 13 is a diagram illustrating a mobile terminal in a one hundred and thirty degree open position according to the present invention;

fig. 14 is a schematic structural diagram of the mobile terminal in a closed state according to the present invention.

Detailed Description

Referring to fig. 1 to 7, the folding hinge of the present invention has a mounting base 1; the left side and the right side of the mounting base 1 are symmetrically provided with turnover assemblies 2; an even-number-stage gear set 3 is arranged on the mounting base 1; the turnover assembly 2 comprises a driving block 21, a first rotating plate 22, a second rotating plate 23 and a damping piece 24 for damping rotation of the turnover assembly 2 during turnover; one end of the first rotating plate 22 is rotatably connected with the mounting base 1 through a compensation slide block 25, and the other end of the first rotating plate 22 is rotatably connected with the driving block 21 through a rotating shaft 4.

The mounting base 1 and the outer side of the compensation slide block 25 form virtual shaft type rotation fit; the end of the first rotating plate 22 which is not rotatably connected with the driving block 21 forms a virtual shaft type rotation fit with the inner side of the compensation slide 25. The so-called virtual shaft type rotation fit is a sliding fit formed by the arc-shaped groove and the arc-shaped block.

The compensation slide block 25 is provided with a first limit chute 251; a first limit block 221 is arranged at one end of the first rotating plate 22, which is in running fit with the compensation slide block 25; the first limiting block 221 is slidably disposed in the first limiting chute 251 along with the relative rotation between the first rotating plate 22 and the compensation sliding block 25; when the driving block 21 is in the closed state, the first limiting block 221 is located at one end of the first limiting sliding groove 251, and forms a limiting fit with the first limiting sliding groove 251 to limit the first rotating plate 22 to continuously turn toward the closing direction of the driving block 21.

One end of the second rotating plate 23 is a compensation part 231, the other end is a driving part 232, and an arc part 233 which expands outwards is arranged between the compensation part 231 and the driving part 232; the compensation part 231 of the second rotating plate 23 forms sliding compensation fit with the driving block 21; the driving parts 232 of the second rotating plates 23 on the left side and the right side of the mounting base 1 are respectively in transmission fit with the gears on the two sides of the even-numbered gear set 3, so that the turning plate assemblies 2 on the two sides are synchronously turned through the even-numbered gear set 3; when the driving block 21 is in a closed state of the folding hinge, one ends of the first rotating plate 22 and the driving block 21 which are rotatably connected are close to each other, one ends of the first rotating plate 22 and the compensation sliders 25 which are rotatably connected are far away from each other, and the compensation sliders 25 on the two sides are far away from each other under the traction of the first rotating plate 22; and an outwardly expanded receiving chamber is formed between the arc parts 233 of the second rotating plates 23 at the left and right sides of the mounting base 1.

The driving block 21 is provided with an arc-shaped compensation chute 211; the compensation part 231 of the second rotating plate 23 is slidably disposed in the arc compensation sliding groove 211.

The driving block 21 is provided with a second limiting sliding groove 212 arranged along the extending direction of the arc-shaped compensation sliding groove 211; the compensation part 231 of the second rotating plate 23 is provided with a second limiting block 231-1; the second limiting block 231-1 is slidably arranged in the second limiting sliding groove 212 along with the relative rotation of the second rotating plate 23 and the driving block 21; when the driving block 21 is in the fully opened state, the second limiting block 231-1 is located at one end of the second limiting sliding groove 212, and forms a limiting fit with the second limiting sliding groove 212 to limit the second rotating plate 23 to continuously turn toward the opening direction of the driving block 21.

The damping member 24 includes a first damping tooth 241 provided on the driving part 232 of the second rotating plate 23 and rotating coaxially with the driving part 232, and a second damping tooth 242 seeking to mesh with the first damping tooth 241 under the action of a damping spring 243; as the flip assembly 2 rotates, the first and second damping teeth 241 and 242 on the corresponding sides form a damping rotation by a distance difference formed in a continuous meshing process.

Both sides of the compensation slide block 25 form virtual shaft type rotation fit with the mounting base 1; both sides of one end of the first rotating plate 22, which is not rotatably connected with the driving block 21, form a virtual shaft type rotation fit with both sides of the compensation slide block 25. So as to achieve a more stable snug fit.

The mounting base 1 comprises a reference body 11, a retainer 12 and a limiting frame 13; the reference body 11 is rotatably connected with the first rotating plate 22; the holder 12 is fixedly mounted with the reference body 11; the even-level gear set 3 is rotationally arranged on the retainer 12, and the limiting frame 13 is fixedly arranged on the retainer 12; an output shaft of a gear in transmission fit with the driving part 232 of the second rotating plate 23 sequentially penetrates through the driving part 232, the second damping convex teeth 242 and the damping spring 243 and then is rotationally connected with the limiting frame 13; two ends of the damping spring 243 act on the limiting frame 13 and the second damping convex tooth 242 respectively; the second damping teeth 242 located at the left and right sides of the mounting base 1 are integrally connected by a link. The output shaft of the gear in transmission fit with the driving part 232 of the second rotating plate 23 and the driving part 232 of the second rotating plate 23 form circumferential transmission fit; the output shaft of the gear drivingly engaged with the driving portion 232 of the second rotating plate 23 is rotatable within the second damping teeth 242 and the damping springs 243 without rotating the second damping teeth 242 and the damping springs 243.

Referring to fig. 8 to 11, the hinge mechanism for a foldable screen according to the present invention includes a hinge mount 5, three folding hinges of one kind described above, and a support plate 6 for supporting a folded portion of a flexible screen 7; the three folding hinges are fixedly arranged on the hinge mounting seat 5 along the extending direction of the hinge mounting seat 5; supporting plates 6 are arranged between the first rotating plates 22 on the same side of the adjacent folding hinges, and two ends of each supporting plate 6 are fixedly connected with the corresponding first rotating plate 22.

Referring to fig. 12 to 14, the mobile terminal according to the present invention includes the hinge mechanism for a foldable screen; the flexible screen 7, the left casing 8 and the right casing 9 are also included; a left supporting plate and a right supporting plate which support the flexible screen 7 in rotation are respectively arranged on the inner sides of the left casing 8 and the right casing 9, and the left supporting plate and the right supporting plate are fixedly connected with the flexible screen 7; the left machine shell 8 is fixedly connected with a driving block 21 of the turnover component 2 at the left side of each folding hinge; the right housing 9 is fixedly connected with the driving block 21 of the right turnover assembly 2 of each folding hinge.

The folding process of the mobile terminal in the invention is as follows:

from the closed state to the fully open state: the left casing 8 and/or the right casing 9 are/is turned downwards manually, so that the driving block 21 is driven to turn downwards, and the first rotating plate 22 and the second rotating plate 23 are driven to rotate downwards by turning the driving block 21 downwards; meanwhile, the overturning components 2 on the left side and the right side rotate synchronously and reversely under the action of the even-numbered transmission gear sets 3; in the rotating process, the second rotating plate 23 realizes damping rotation under the action of the damping piece 24, namely realizing midway stop; when fully opened, the left housing 8 and the right housing 9 are at a horizontal plane, and the opening is completed.

From the fully open state to the closed state: the left casing 8 and/or the right casing 9 are/is turned upwards manually to drive the driving block 21 to turn upwards, and the driving block 21 is turned upwards to drive the first rotating plate 22 and the second rotating plate 23 to rotate upwards; meanwhile, the overturning components 2 on the left side and the right side rotate synchronously and reversely under the action of the even-numbered transmission gear sets 3; in the rotating process, the second rotating plate 23 realizes damping rotation under the action of the damping piece 24, namely realizing midway stop; when the left casing 8 and the right casing 9 are completely closed, the ends of the first rotating plate 22 rotatably connected with the driving block 21 are close to each other, the ends of the first rotating plate 22 rotatably connected with the compensation sliders 25 are far away from each other, and the compensation sliders 25 on the two sides are far away from each other under the traction of the first rotating plate 22; and an outward-expanding cavity is formed between the arc parts 233 of the second rotating plates 23 on the left and right sides of the mounting base 1, and the folding parts of the flexible screen 7 are well placed in the cavity formed by the first rotating plate 22 and the second rotating plate 23.

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.