1. A hinge mechanism for a folding screen has a hinge mount; the method is characterized in that: a plurality of hinge devices are arranged on the hinge mounting seat along the extending direction of the hinge mounting seat; the hinge device comprises a mounting base, a left side overturning component and a right side overturning component which are rotatably arranged on the mounting base and synchronously overturned through an even number gear set; the left side overturning assembly comprises a left rotating plate, a left turning plate and a left damping piece; the left rotating plate is rotatably connected with the mounting base, and a left sliding groove is formed in the left rotating plate; one end of the left turning plate is in transmission connection with a gear at one end of the even number gear set, and the other end of the left turning plate is in sliding connection with the left sliding chute for sliding compensation along with the rotation of the left turning assembly; the left damping part comprises a first left damping convex tooth which is arranged on the left turning plate and coaxially rotates with the left turning plate, and a second left damping convex tooth which is engaged with the first left damping convex tooth under the action of a left damping spring; along with the rotation of the left overturning component, the first left damping convex tooth and the second left damping convex tooth form damping rotation through distance difference formed in the continuous meshing process;

the right side overturning assembly comprises a right rotating plate, a right turning plate and a right damping piece; the right rotating plate is rotatably connected with the mounting base, and a right sliding groove is formed in the right rotating plate; one end of the right turning plate is in transmission connection with a gear at the other end of the even number gear set, and the other end of the right turning plate is in sliding connection with the right chute for sliding compensation along with the rotation of the right turning component; the right damping part comprises a first right damping convex tooth which is arranged on the right turning plate and rotates coaxially with the right turning plate, and a second right damping convex tooth which is engaged with the first right damping convex tooth under the action of a right damping spring; along with the rotation of the right side overturning component, the first right side damping convex tooth and the second right side damping convex tooth form damping rotation through distance difference formed in the continuous meshing process.

2. A hinge mechanism for a folding screen according to claim 1, wherein: the two ends and the middle part of the hinge mounting seat are provided with hinge devices; the front side and the rear side of the mounting base of the hinge device in the middle are symmetrically provided with an even number gear set, a left turning plate, a right turning plate, a left damping piece and a right damping piece; the front side and the rear side of the left rotating plate of the middle hinge device are symmetrically provided with left sliding chutes, and the front side and the rear side of the right rotating plate of the middle hinge device are symmetrically provided with right sliding chutes; the even gear set of the hinge device in the middle comprises an even number of gears which are arranged on the retainer and are mutually matched in a transmission way, or comprises two rotating shafts arranged on the retainer;

when the even number gear set of the hinge device at the middle part comprises an even number of gears which are arranged on the retainer and are mutually matched in a transmission way, the left turning plate is in transmission connection with the gear at one end of the even number gear set at the corresponding side, and the right turning plate is in transmission connection with the gear at the other end of the even number gear set at the corresponding side;

when the even number gear set of the hinge device at the middle part comprises two rotating shafts arranged on the retainer, the left turning plate is in transmission connection with the rotating shaft at one end of the even number gear set at the corresponding side, and the right turning plate is in transmission connection with the rotating shaft at the other end of the even number gear set at the corresponding side;

the left turning plate is in sliding connection with the left sliding chute on the corresponding side; the right turning plate is in sliding connection with the right sliding chute on the corresponding side; a left damping piece is correspondingly arranged at each left turning plate, and a right damping piece is correspondingly arranged at each right turning plate;

the left damping part and the right damping part of the hinge device at the two ends of the hinge mounting seat are both positioned on one side of the mounting base close to the hinge device in the middle.

3. A hinge mechanism for a folding screen according to claim 1, wherein: the left sliding groove and the right sliding groove are both straight-line grooves; the part of the left turning plate, which is in sliding connection with the left sliding chute, is a straight plate body; the part of the right turning plate in sliding connection with the right chute is also a straight plate body.

4. A hinge mechanism for a folding screen according to claim 1, wherein: and the left side overturning assembly and the right side overturning assembly are respectively provided with a limiting assembly which is used for preventing the left side overturning assembly and the right side overturning assembly from rotating in a passing mode when being closed.

5. A hinge mechanism for a folding screen, according to claim 4, wherein: the limiting assembly comprises a first limiting part and a second limiting part; the left turning plate and the right turning plate are respectively provided with a first limiting part; second limiting parts corresponding to the first limiting parts on the left turning plate and the right turning plate respectively are arranged on the retainers of the even gear sets or the hinge mounting seats; when the left side upset subassembly and the right side upset subassembly are closed, the contact of second spacing portion and first spacing portion and restriction left side board, the right side board that turns over continues closed rotation.

6. A hinge mechanism for a folding screen, according to claim 1 or 2 or 3 or 4 or 5, wherein: the left rotating plate comprises a first left connecting plate for fixedly connecting the left supporting middle frame and a second left connecting plate for fixedly connecting the left shell; one end of the first left connecting plate is rotatably connected with the mounting base, and the other end of the first left connecting plate is rotatably connected with the second left connecting plate through a rotating shaft; a left chute is arranged on the second left connecting plate;

the right rotating plate comprises a first right connecting plate for fixedly connecting the right supporting middle frame and a second right connecting plate for fixedly connecting the right casing; one end of the first right connecting plate is rotatably connected with the mounting base, and the other end of the first right connecting plate is rotatably connected with the second right connecting plate through a rotating shaft; a right chute is arranged on the second right connecting plate;

the left side supports the center and the right side supports the center and is used for supporting the flexible screen.

7. A hinge mechanism for a folding screen, according to claim 1 or 2 or 3 or 4 or 5, wherein: a bearing plate for supporting the flexible screen is arranged between the adjacent hinge devices; the supporting plate is connected to the hinge mounting seat through at least one elastic component; the elastic assembly comprises a reference block, a return spring and a limit screw; the reference block is fixedly connected to the hinge mounting seat in a detachable mode; a limiting through hole is arranged on the reference block; an inserting body is arranged on the lower plane of the bearing plate corresponding to the limiting through hole, and an internal thread hole in threaded fit with the limiting screw is arranged on the inserting body; a stop ring for limiting the nut of the limit screw to pass through is arranged at the upper port part of the limit through hole; the inserting body is inserted from the upper end of the through hole of the limiting pipe and is in threaded fit with the limiting screw; the reset spring is sleeved on the insertion body, and two ends of the reset spring respectively act on a nut and a baffle ring of the limit screw;

a left top block which can rotate along with the left turning plate is arranged on an output shaft of a gear of the even number gear set which is in transmission connection with the left turning plate; a right top block which can rotate along with the right turning plate is arranged on an output shaft of the gear of the even number gear set which is in transmission connection with the right turning plate; the left ejector block and the right ejector block are respectively provided with an ejector head for ejecting the bearing plate; when the left side overturning assembly and the right side overturning assembly are completely opened, the supporting plate is completely jacked up by the jacking heads on the left jacking block and the right jacking block under the action of overcoming the tension of the return spring; when the left side overturning assembly and the right side overturning assembly are completely closed, the jacking heads on the left jacking block and the right jacking block are separated from the bearing plate, and the bearing plate sinks under the action of the reset spring.

8. A hinge mechanism for a folding screen, according to claim 6, wherein: a bearing plate for supporting the flexible screen is arranged between the adjacent hinge devices; the supporting plate is connected to the hinge mounting seat through at least one elastic component; the elastic assembly comprises a reference block, a return spring and a limit screw; the reference block is fixedly connected to the hinge mounting seat in a detachable mode; a limiting through hole is arranged on the reference block; an inserting body is arranged on the lower plane of the bearing plate corresponding to the limiting through hole, and an internal thread hole in threaded fit with the limiting screw is arranged on the inserting body; a stop ring for limiting the nut of the limit screw to pass through is arranged at the upper port part of the limit through hole; the inserting body is inserted from the upper end of the through hole of the limiting pipe and is in threaded fit with the limiting screw; the reset spring is sleeved on the insertion body, and two ends of the reset spring respectively act on a nut and a baffle ring of the limit screw;

a left top block which can rotate along with the left turning plate is arranged on an output shaft of a gear of the even number gear set which is in transmission connection with the left turning plate; a right top block which can rotate along with the right turning plate is arranged on an output shaft of the gear of the even number gear set which is in transmission connection with the right turning plate; the left ejector block and the right ejector block are respectively provided with an ejector head for ejecting the bearing plate; when the left side overturning assembly and the right side overturning assembly are completely opened, the supporting plate is completely jacked up by the jacking heads on the left jacking block and the right jacking block under the action of overcoming the tension of the return spring; when the left side overturning assembly and the right side overturning assembly are completely closed, the jacking heads on the left jacking block and the right jacking block are separated from the bearing plate, and the bearing plate sinks under the action of the reset spring.

9. A hinge mechanism for a folding screen according to claim 7, wherein: a reference block is arranged between the left damping part and the right damping part of each hinge device; limiting holes are symmetrically formed in the left side and the right side of the reference block; the output shafts of the gears of the even gear set in transmission connection with the left turning plate and the output shafts of the gears of the even gear set in transmission connection with the right turning plate penetrate through the corresponding limiting holes; the left damping spring of the left damping part, the right damping of the right damping part, the second left damping convex tooth and the second right damping convex tooth are all sleeved on the corresponding output shafts; the two ends of the left damping spring respectively act on the end faces of the second left damping convex tooth and the corresponding limiting hole facing the second left damping convex tooth; and two ends of the right damping spring respectively act on the end surfaces of the second right damping convex tooth and the corresponding limiting hole facing the second right damping convex tooth.

10. A hinge mechanism for a folding screen according to claim 8, wherein: a reference block is arranged between the left damping part and the right damping part of each hinge device; limiting holes are symmetrically formed in the left side and the right side of the reference block; an output shaft of a gear of an even number gear set in transmission connection with the left turning plate sequentially penetrates through a corresponding first left damping convex tooth, a corresponding second left damping convex tooth, a corresponding left damping spring, a corresponding limiting hole and a corresponding left jacking block and is in transmission connection with the first left damping convex tooth and the corresponding left jacking block; the two ends of the left damping spring respectively act on the end faces of the second left damping convex tooth and the corresponding limiting hole facing the second left damping convex tooth;

an output shaft of a gear of an even number gear set in transmission connection with the right turning plate sequentially penetrates through the corresponding first right damping convex tooth, second right damping convex tooth, right damping spring, limiting hole and right top block and is in transmission connection with the first right damping convex tooth and the right top block; two ends of the right damping spring respectively act on the second right damping convex tooth and the end face, facing the second right damping convex tooth, of the corresponding limiting hole;

the second left damping convex tooth and the second right damping convex tooth which are positioned on the same side are connected into a whole through a connecting plate.

11. A hinge mechanism for a folding screen according to claim 1, wherein: the left turning plate is provided with a left turning edge extending along the sliding direction of the left turning plate in the left sliding chute; the right turning plate is provided with a right flanging extending along the sliding direction in the right sliding chute; the left turning plate is provided with a left buckle which is used for clamping the left turning edge and limiting the sliding connection of the left turning plate in the left sliding chute; and the right rotating plate is provided with a right buckle which is used for clamping the right flanging and limiting the right turning plate to be connected in the right sliding groove in a sliding manner.

12. A hinge mechanism for a folding screen according to claim 1, wherein: the holder comprises a first holding plate and a second holding plate which are oppositely arranged; the gears of the even gear set are positioned between the first retaining plate and the second retaining plate and are rotatably arranged on the first retaining plate and the second retaining plate; the first retaining plate is fixedly connected to the hinge mounting seat or is a part of the mounting base; the first holding plate is provided with clamping through holes corresponding to gears at two ends of the even gear set; output shafts are arranged on the gears at the two ends of the even number gear set, and clamping heads are arranged at one ends, located on the first retaining plate, of the output shafts; the clamping through hole comprises a through hole for the output shaft of the corresponding gear to pass through and form coaxiality limitation, and an avoidance groove for the chuck to pass through; when the output shafts of the gears at the two ends penetrate through the clamping through holes, the clamping heads and the through holes form limiting clamping through rotation.

13. A mobile terminal, characterized by: a hinge mechanism for a folding screen comprising the hinge mechanism of claim 10, a left side housing and a right side housing; the left shell is fixedly connected with the second left connecting plate, and the right shell is fixedly connected with the second right connecting plate; the left supporting plate and the right supporting plate which support the flexible screen in a rotating mode are installed on the inner sides of the left side casing and the right side casing respectively, and the left supporting plate and the right supporting plate are fixedly connected with the flexible screen.

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 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, so that the problems of increase in folding thickness, large frame thickness and the like of the mobile terminal adopting the folding screen are solved. Meanwhile, the existing mobile terminal adopting the folding screen can extrude and stretch the flexible screen in the folding process, and the flexible screen is easy to damage particularly at the folding part of the flexible screen along with long-time use.

Disclosure of Invention

The first purpose of the invention is to provide a hinge mechanism for a folding screen, which has simple structure and high function integration, and can effectively save the installation space; meanwhile, the flexible screen can provide a better supporting effect when being unfolded, and can provide a containing space for the overturning part of the flexible screen after the flexible screen is folded, so that damage to the flexible screen is reduced.

The technical scheme for realizing the first purpose of the invention is as follows: the hinge mechanism for the folding screen is provided with a hinge mounting seat; a plurality of hinge devices are arranged on the hinge mounting seat along the extending direction of the hinge mounting seat; the hinge device comprises a mounting base, a left side overturning component and a right side overturning component which are rotatably arranged on the mounting base and synchronously overturned through an even number gear set; the left side overturning assembly comprises a left rotating plate, a left turning plate and a left damping piece; the left rotating plate is rotatably connected with the mounting base, and a left sliding groove is formed in the left rotating plate; one end of the left turning plate is in transmission connection with a gear at one end of the even number gear set, and the other end of the left turning plate is in sliding connection with the left sliding chute for sliding compensation along with the rotation of the left turning assembly; the left damping part comprises a first left damping convex tooth which is arranged on the left turning plate and coaxially rotates with the left turning plate, and a second left damping convex tooth which is engaged with the first left damping convex tooth under the action of a left damping spring; along with the rotation of the left overturning component, the first left damping convex tooth and the second left damping convex tooth form damping rotation through distance difference formed in the continuous meshing process;

the right side overturning assembly comprises a right rotating plate, a right turning plate and a right damping piece; the right rotating plate is rotatably connected with the mounting base, and a right sliding groove is formed in the right rotating plate; one end of the right turning plate is in transmission connection with a gear at the other end of the even number gear set, and the other end of the right turning plate is in sliding connection with the right chute for sliding compensation along with the rotation of the right turning component; the right damping part comprises a first right damping convex tooth which is arranged on the right turning plate and rotates coaxially with the right turning plate, and a second right damping convex tooth which is engaged with the first right damping convex tooth under the action of a right damping spring; along with the rotation of the right side overturning component, the first right side damping convex tooth and the second right side damping convex tooth form damping rotation through distance difference formed in the continuous meshing process.

The two ends and the middle part of the hinge mounting seat are provided with hinge devices; the front side and the rear side of the mounting base of the hinge device in the middle are symmetrically provided with an even number gear set, a left turning plate, a right turning plate, a left damping piece and a right damping piece; the front side and the rear side of the left rotating plate of the middle hinge device are symmetrically provided with left sliding chutes, and the front side and the rear side of the right rotating plate of the middle hinge device are symmetrically provided with right sliding chutes; the even gear set of the hinge device in the middle comprises an even number of gears which are arranged on the retainer and are mutually matched in a transmission way, or comprises two rotating shafts arranged on the retainer;

when the even number gear set of the hinge device at the middle part comprises an even number of gears which are arranged on the retainer and are mutually matched in a transmission way, the left turning plate is in transmission connection with the gear at one end of the even number gear set at the corresponding side, and the right turning plate is in transmission connection with the gear at the other end of the even number gear set at the corresponding side;

when the even number gear set of the hinge device at the middle part comprises two rotating shafts arranged on the retainer, the left turning plate is in transmission connection with the rotating shaft at one end of the even number gear set at the corresponding side, and the right turning plate is in transmission connection with the rotating shaft at the other end of the even number gear set at the corresponding side; the scheme is to reduce the use amount of the gears, and when the hinge devices are arranged at the two ends of the hinge mounting seat, the hinge device in the middle does not need to be provided with a gear for synchronizing the traditional gears, so that the cost can be effectively reduced;

the left turning plate is in sliding connection with the left sliding chute on the corresponding side; the right turning plate is in sliding connection with the right sliding chute on the corresponding side; a left damping piece is correspondingly arranged at each left turning plate, and a right damping piece is correspondingly arranged at each right turning plate;

the left damping part and the right damping part of the hinge device at the two ends of the hinge mounting seat are both positioned on one side of the mounting base close to the hinge device in the middle.

The left sliding chute and the right sliding chute are straight chutes; the part of the left turning plate, which is in sliding connection with the left sliding chute, is a straight plate body; the part of the right turning plate in sliding connection with the right chute is also a straight plate body.

The left side upset subassembly and the right side upset subassembly all are equipped with the spacing subassembly that is used for preventing that left side upset subassembly and right side upset subassembly from crossing when closing and changeing.

The limiting assembly comprises a first limiting part and a second limiting part; the left turning plate and the right turning plate are respectively provided with a first limiting part; second limiting parts corresponding to the first limiting parts on the left turning plate and the right turning plate respectively are arranged on the retainers of the even gear sets or the hinge mounting seats; when the left side upset subassembly and the right side upset subassembly are closed, the contact of second spacing portion and first spacing portion and restriction left side board, the right side board that turns over continues closed rotation.

The left rotating plate comprises a first left connecting plate for fixedly connecting the left supporting middle frame and a second left connecting plate for fixedly connecting the left shell; one end of the first left connecting plate is rotatably connected with the mounting base, and the other end of the first left connecting plate is rotatably connected with the second left connecting plate through a rotating shaft; a left chute is arranged on the second left connecting plate;

the right rotating plate comprises a first right connecting plate for fixedly connecting the right supporting middle frame and a second right connecting plate for fixedly connecting the right casing; one end of the first right connecting plate is rotatably connected with the mounting base, and the other end of the first right connecting plate is rotatably connected with the second right connecting plate through a rotating shaft; a right chute is arranged on the second right connecting plate;

the left side supports the center and the right side supports the center and is used for supporting the flexible screen.

A bearing plate for supporting the flexible screen is arranged between the adjacent hinge devices; the supporting plate is connected to the hinge mounting seat through at least one elastic component; the elastic assembly comprises a reference block, a return spring and a limit screw; the reference block is fixedly connected to the hinge mounting seat in a detachable mode; a limiting through hole is arranged on the reference block; an inserting body is arranged on the lower plane of the bearing plate corresponding to the limiting through hole, and an internal thread hole in threaded fit with the limiting screw is arranged on the inserting body; a stop ring for limiting the nut of the limit screw to pass through is arranged at the upper port part of the limit through hole; the inserting body is inserted from the upper end of the through hole of the limiting pipe and is in threaded fit with the limiting screw; the reset spring is sleeved on the insertion body, and two ends of the reset spring respectively act on a nut and a baffle ring of the limit screw;

a left top block which can rotate along with the left turning plate is arranged on an output shaft of a gear of the even number gear set which is in transmission connection with the left turning plate; a right top block which can rotate along with the right turning plate is arranged on an output shaft of the gear of the even number gear set which is in transmission connection with the right turning plate; the left ejector block and the right ejector block are respectively provided with an ejector head for ejecting the bearing plate; when the left side overturning assembly and the right side overturning assembly are completely opened, the supporting plate is completely jacked up by the jacking heads on the left jacking block and the right jacking block under the action of overcoming the tension of the return spring; when the left side overturning assembly and the right side overturning assembly are completely closed, the jacking heads on the left jacking block and the right jacking block are separated from the bearing plate, and the bearing plate sinks under the action of the reset spring.

A reference block is arranged between the left damping part and the right damping part of each hinge device; limiting holes are symmetrically formed in the left side and the right side of the reference block; an output shaft of a gear of an even number gear set in transmission connection with the left turning plate sequentially penetrates through the corresponding first left damping convex tooth, second left damping convex tooth, left damping spring, limiting hole and left top block and is in transmission connection with the first left damping convex tooth and the left top block, namely the first left damping convex tooth, the left top block and the output shaft are driven to rotate along with the rotation of the left turning plate, and the output shaft rotates in the second left damping convex tooth, the left damping spring and the limiting hole; the two ends of the left damping spring respectively act on the end faces of the second left damping convex tooth and the corresponding limiting hole facing the second left damping convex tooth;

an output shaft of a gear of an even number gear set in transmission connection with the right turning plate sequentially penetrates through the corresponding first right damping convex tooth, second right damping convex tooth, right damping spring, limiting hole and right top block and is in transmission connection with the first right damping convex tooth and the right top block, namely the first right damping convex tooth, the right top block and the output shaft are driven to rotate along with the rotation of the right turning plate, and the output shaft rotates in the second right damping convex tooth, the right damping spring and the limiting hole; two ends of the right damping spring respectively act on the second right damping convex tooth and the end face, facing the second right damping convex tooth, of the corresponding limiting hole;

the second left damping convex tooth and the second right damping convex tooth which are positioned on the same side are connected into a whole through a connecting plate

The left turning plate is provided with a left turning edge extending along the sliding direction of the left turning plate in the left sliding chute; the right turning plate is provided with a right flanging extending along the sliding direction in the right sliding chute; the left turning plate is provided with a left buckle which is used for clamping the left turning edge and limiting the sliding connection of the left turning plate in the left sliding chute; and the right rotating plate is provided with a right buckle which is used for clamping the right flanging and limiting the right turning plate to be connected in the right sliding groove in a sliding manner.

The retainer comprises a first retaining plate and a second retaining plate which are oppositely arranged; the gears of the even gear set are positioned between the first retaining plate and the second retaining plate and are rotatably arranged on the first retaining plate and the second retaining plate; the first retaining plate is fixedly connected to the hinge mounting seat or is a part of the mounting base; the first holding plate is provided with clamping through holes corresponding to gears at two ends of the even gear set; output shafts are arranged on the gears at the two ends of the even number gear set, and clamping heads are arranged at one ends, located on the first retaining plate, of the output shafts; the clamping through hole comprises a through hole for the output shaft of the corresponding gear to pass through and form coaxiality limitation, and an avoidance groove for the chuck to pass through; when the output shafts of the gears at the two ends penetrate through the clamping through holes, the clamping heads and the through holes form limiting clamping through rotation.

A second object of the present invention is to provide a mobile terminal using the hinge structure, which can provide a receiving space for the folded portion of the flexible screen when the mobile terminal is folded and stored, and reduce damage to the folded portion of the flexible screen.

The technical scheme for realizing the second purpose of the invention is as follows: the mobile terminal comprises the hinge mechanism for the folding screen, a left shell and a right shell; the left shell is fixedly connected with the second left connecting plate, and the right shell is fixedly connected with the second right connecting plate; the left supporting plate and the right supporting plate which support the flexible screen in a rotating mode are installed on the inner sides of the left side casing and the right side casing respectively, and the left supporting plate and the right supporting plate are fixedly connected with the flexible screen.

The invention has the positive effects that: (1) the hinge mechanism for the folding screen has the advantages of simple structure and high function integration, and can effectively save the installation space; the device is mainly characterized in that the left turning plate is connected with the left turning plate through sliding connection, so that sliding compensation is realized, and the compensation requirements when the rotating axes of the gears at the two ends of the even number gear set are not coaxial with the rotating axes of the left turning plate and the right turning plate are met; a left damping part and a right damping part are respectively integrated on the secondary left turning plate and the secondary right turning plate, and the integration degree is high.

(2) According to the hinge device, the even gear sets, the left turning plate, the right turning plate, the left damping piece and the right damping piece are symmetrically arranged on the front side and the rear side of the mounting base of the hinge device positioned in the middle of the hinge mounting seat, the left sliding grooves are symmetrically arranged on the front side and the rear side of the left turning plate, the right sliding grooves are symmetrically arranged on the front side and the rear side of the right turning plate, and the torque can be further improved and the damping effect can be improved through the added left damping piece and the added right damping piece.

(3) The mounting bases of the hinge devices positioned at the two ends of the hinge mounting seat are directly attached to the edges of the hinge mounting seat, so that the possibility of narrowing the edges of the frame of the mobile terminal is provided.

(4) The limiting assembly can effectively avoid over-rotation of the left side overturning assembly and the right side overturning assembly when the left side overturning assembly and the right side overturning assembly are closed; simultaneously, spacing subassembly design benefit through the cooperation of the spacing portion of second and first spacing portion, restricts the commentaries on classics of turning over the board on the left side and turning over the board on the right side and come the indirect restriction left side upset subassembly and the commentaries on classics of turning over the board on the right side when closed, and this design does not occupy installation space.

(5) According to the invention, the rotation compensation can be further obtained through the rotary connection of the first left connecting plate and the second left connecting plate and the rotary connection of the first right connecting plate and the second right connecting plate, so that a larger accommodating space is provided for the folding part of the flexible screen.

(6) According to the invention, through the matching of the supporting plate, the elastic component, the left top block and the right top block, the supporting plate can upwards support the folding part of the flexible screen when the left side overturning component and the right side overturning component are unfolded, so that the smoothness of the flexible screen is better; simultaneously can let the bearing board sink and provide accommodation space for the flexible screen because of turning over the folding portion that turns over that leads to the extension at the closure of left side upset subassembly and right side upset subassembly to reduce the damage to the folding portion that turns over of flexible screen, improve the life of flexible screen.

(7) According to the invention, the left damping part and the right damping part are integrally arranged on the reference block, so that the integration is further improved, the parts are simplified, and meanwhile, the installation space is greatly saved.

(8) According to the invention, through the matching of the left buckle and the left turning plate and the matching of the right buckle and the right turning plate, the even gear set, the left turning plate, the right turning plate, the left damping part and the right damping part can be simultaneously limited and installed, the design is ingenious, and the assembly is convenient.

(9) In the invention, the left chute and the right chute are both straight-line grooves; the sliding connection part of the left turning plate and the left sliding groove is a straight plate body, the contact area is increased by the cooperation of the left turning plate and the left sliding groove, and the idle stroke of the rotating shaft in the rotating process is reduced.

(10) According to the invention, the clamping through hole is matched with the clamping head for installation, so that the positioning can be more accurate in assembly, and the assembly precision of a product is kept.

(11) Even number gear sets in the hinge device in the middle part of the invention can not adopt gear matching, because the gears in the hinge device can be saved after the hinge device is arranged at the two ends of the hinge mounting seat, thereby playing the role of reducing cost.

(12) According to the invention, through an integrated design, the assembly efficiency is improved, the manual assembly cost is reduced, the assembly can be carried out by division of labor, and the production flexibility is greatly improved.

(13) All parts of the hinge device are shared, so that the cost of the die is reduced, and the types of the parts are greatly reduced.

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 hinge mechanism for a folding screen according to the present invention;

FIG. 2 is an exploded view of the hinge mechanism for the folding screen of the present invention;

FIG. 3 is a schematic view of a hinge assembly mounted on the hinge mount of the present invention;

FIG. 4 is a schematic view of the hinge assembly at both ends of the hinge mount of the present invention;

FIG. 5 is a rear side view of the hinge assembly of the present invention at opposite ends of the hinge mount;

FIG. 6 is a schematic view of the hinge assembly of the present invention located in the middle of the hinge mount;

FIG. 7 is a rear side schematic view of the hinge assembly of the present invention positioned in the middle of the hinge mount;

FIG. 8 is a schematic view of the present invention showing the connection of the support plate to the hinge mount via the elastic member;

FIG. 9 is a schematic structural view of the present invention in which the supporting plate is completely jacked up by the left jacking block and the right jacking block;

FIG. 10 is a schematic view of the sinking state of the supporting plate according to the present invention;

FIG. 11 is a schematic view of the hinge mechanism for a foldable screen according to the present invention in a closed position;

FIG. 12 is a schematic view of the installation of even numbered gear sets in accordance with the present invention;

fig. 13 is a schematic structural view of the mobile terminal in an unfolded state according to the present invention;

FIG. 14 is an exploded view of FIG. 11;

fig. 15 is a schematic structural diagram of a closed state of the mobile terminal according to the present invention.

Detailed Description

Referring to fig. 1 to 12, the hinge mechanism for a folding screen of the present invention has a hinge mount 1; the two ends of the hinge mounting seat 1 are symmetrically provided with hinge devices 2, and the middle part of the hinge mounting seat 1 is also provided with the hinge devices 2.

The hinge device 2 at both ends of the hinge mount 1 includes a mount base 21, and a left and a right flipping unit 23 and 24 rotatably disposed on the mount base 21 and forming a simultaneous flipping through an even number of gear sets 22.

The left turn-over assembly 23 includes a left turn-over plate 231, a left turn-over plate 232, and a left damper 233; the left-turn plate 231 includes a first left-side connection plate 231-1 for fixedly connecting the left-side support middle frame 3, and a second left-side connection plate 231-2 for fixedly connecting the left-side cabinet 4; one end of the first left connecting plate 231-1 is rotatably connected with the mounting base 21, and the other end is rotatably connected with the second left connecting plate 231-2 through a rotating shaft; a left sliding groove 231-3 is arranged on the second left connecting plate 231-2; the even gear set 22 comprises four gears which are rotatably arranged on the retainer 221 and are in transmission fit with each other; one end of the left turning plate 232 is in transmission connection with the gear at the leftmost end of the even gear set 22, the other end of the left turning plate 232 and the left chute 231-3 form a sliding connection for sliding compensation along with the rotation of the left turning component 23, and the specific sliding connection is as follows: the left turning plate 232 is provided with a left flange 232-1 extending along the sliding direction of the left turning plate in the left sliding groove 231-3; the left rotating plate 231 is provided with a left buckle 231-4 which is used for clamping a left flanging 232-1 and limiting the left turning plate 232 to be connected in the left sliding groove 231-3 in a sliding manner; the left damping member 233 comprises a first left damping convex tooth 233-1 which is arranged on the left turning plate 232 and rotates coaxially with the left turning plate 232, and a second left damping convex tooth 233-3 which seeks to be meshed with the first left damping convex tooth 233-1 under the action of a left damping spring 233-2; as the left flip assembly 23 rotates, the first left damping lobe 233-1 and the second left damping lobe 233-3 form a damped rotation by the distance difference formed during the continuous meshing process. Wherein the first left damping lobe 233-1 is integral with the left panel 232.

The right rollover assembly 24 includes a right turn plate 241, a right flap 242, and a right damper 243; the right turn plate 241 includes a first right connection plate 241-1 for fixedly connecting the right support middle frame 5, and a second right connection plate 241-2 for fixedly connecting the right cabinet 6; one end of the first right connecting plate 241-1 is rotatably connected with the mounting base 21, and the other end is rotatably connected with the second right connecting plate 241-2 through a rotating shaft; the second right connecting plate 241-2 is provided with a right chute 241-3; one end of the right turning plate 242 is in transmission connection with the gear at the rightmost end of the even number gear set 22, the other end of the right turning plate 242 and the right chute 241-3 form a sliding connection for sliding compensation along with the rotation of the right turning component 24, and the specific sliding connection is as follows: the right turning plate 242 is provided with a right flange 242-1 extending along the sliding direction in the right sliding groove 241-3; the right rotating plate 241 is provided with a right buckle 241-4 which is used for clamping the right flange 242-1 and limiting the right turning plate 242 to be connected in the right sliding groove 241-3 in a sliding manner; the right damping part 243 comprises a first right damping convex tooth 243-1 which is arranged on the right turning plate 242 and rotates coaxially with the right turning plate 242, and a second right damping convex tooth 243-3 which seeks to be meshed with the first right damping convex tooth 243-1 under the action of a right damping spring 243-2; as right rollover assembly 24 rotates, first right damping lobe 243-1 and second right damping lobe 243-3 form a damped rotation by the difference in distance formed during the constant meshing process. Wherein the first right damping tooth 243-1 and the right flap 242 are an integral piece.

The left sliding groove 231-3 and the right sliding groove 241-3 are both straight grooves; the part of the left turning plate 232 in sliding connection with the left sliding chute 231-3 is a straight plate body; the part of the right turning plate 242 which is connected with the right chute 241-3 in a sliding way is also a straight plate body.

The left side support middle frame 3 and the right side support middle frame 5 are used for supporting the flexible screen 7.

The hinge device 2 located in the middle of the hinge mount 1 is different from the hinge devices 2 located at both ends of the hinge mount 1 in that: the front side and the rear side of the mounting base 21 are symmetrically provided with an even gear set 22, a left turning plate 232, a right turning plate 242, a left damping member 233 and a right damping member 243; the front side and the rear side of the left rotating plate 231 of the middle hinge device 2 are symmetrically provided with a left sliding groove 231-3 and a left buckle 231-4, and the front side and the rear side of the right rotating plate 241 of the middle hinge device 2 are symmetrically provided with a right sliding groove 241-3 and a right buckle 241-4; the left turning plate 232 is in transmission connection with a leftmost end gear on the even-numbered gear set 22 on the corresponding side, and the right turning plate 242 is in transmission connection with a rightmost end gear on the even-numbered gear set 22 on the corresponding side; the left turning plate 232 is arranged in the left sliding groove 231-3 on the corresponding side in a sliding manner, and forms sliding connection for limiting the left turning plate 232 to be separated from the left sliding groove 231-3 through a left buckle 231-4 and a left flange 232-1 on the left turning plate 232; the right turning plate 242 is arranged in the right sliding groove 241-3 on the corresponding side in a sliding manner, and forms sliding connection for limiting the right turning plate 242 to be separated from the right sliding groove 241-3 through a right buckle 241-4 and a right flange 242-1 on the right turning plate 242; a left damping member 233 is correspondingly arranged at each left turning plate 232, and a right damping member 243 is correspondingly arranged at each right turning plate 242; the other construction is the same as that of the hinge device 2 at both ends of the hinge mount 21.

The left damping member 233 and the right damping member 243 of the hinge device 2 located at both ends of the hinge mount 1 are located on the side of the hinge device 2 of the mounting base 21 near the middle.

And the left side overturning component 23 and the right side overturning component 24 are respectively provided with a limiting component 8 for preventing the left side overturning component 23 and the right side overturning component 24 from rotating in a closing process.

The limiting assembly 8 comprises a first limiting part 81 and a second limiting part 82; the left turning plate 232 and the right turning plate 242 are respectively provided with a first limiting part 81; the retainer 221 of the even gear set 22 is provided with a second limiting part 82 corresponding to the first limiting part 81 on the left turning plate 232 and the first limiting part 81 on the right turning plate 242 respectively; when the left turnover component 23 and the right turnover component 24 are closed, the second limiting portion 82 contacts the first limiting portion 81 and limits the left turning plate 232 and the right turning plate 242 to continue to rotate in a closed manner.

A supporting plate 9 for supporting the flexible screen 7 is arranged between the adjacent hinge devices 2; the supporting plate 9 is connected to the hinge mounting seat 1 through two elastic components 10; the elastic assembly 10 comprises a reference block 101, a return spring 102 and a limit screw 103; the reference block 101 is fixedly connected to the hinge mounting base 1 in a detachable mode; a limit through hole 101-1 is arranged on the reference block 101; an inserting body 91 is arranged on the lower plane of the supporting plate 9 corresponding to the position of the limiting through hole 101-1, and an internal threaded hole in threaded fit with the limiting screw 103 is formed in the inserting body 91; a stop ring for limiting a nut of a limit screw to pass through is arranged at the upper port part of the limit through hole 101-1; the inserting body 91 is inserted from the upper end of the limiting pipe perforation 101-1 and is in threaded fit with the limiting screw 103; the reset spring 102 is sleeved on the insertion body 91, and two ends of the reset spring 102 respectively act on a nut and a stop ring of the limit screw 103;

a left top block 233-4 which can rotate along with the left turning plate 232 is arranged on an output shaft of a gear of the even gear set 22 which is in transmission connection with the left turning plate 232; a right top block 243-4 which can rotate along with the right turning plate 242 is arranged on the output shaft of the gear of the even gear set 22 which is in transmission connection with the right turning plate 242; the left jacking block 233-4 and the right jacking block 243-4 are respectively provided with a jacking head for jacking the bearing plate; when the left overturning assembly 23 and the right overturning assembly 24 are fully opened, the supporting plate 9 is fully jacked up by the jacking heads on the left jacking block 233-4 and the right jacking block 243-3 under the action of overcoming the tension of the return spring 102; when the left overturning assembly 23 and the right overturning assembly 24 are completely closed, the jacks on the left jacking block 233-4 and the right jacking block 243-4 are separated from the supporting plate 9, and the supporting plate 9 sinks under the action of the return spring 102.

A reference block 101 is arranged between the left damping member 233 and the right damping member 243 of each hinge device 2; the left side and the right side of the reference block 101 are symmetrically provided with limiting holes 101-2; an output shaft of a gear of the even gear set 22 in transmission connection with the left turning plate 232 sequentially passes through the corresponding first left damping convex tooth 233-1, the second left damping convex tooth 233-3, the left damping spring 233-2, the limiting hole 101-2 and the left top block 233-4 and is in transmission connection with the first left damping convex tooth 233-1 and the left top block 233-4, namely, the first left damping convex tooth 233-1, the left top block 233-4 and the output shaft are driven to rotate along with the rotation of the left turning plate 232, and the output shaft rotates in the second left damping convex tooth 233-3, the left damping spring 233-2 and the limiting hole 101-2; the two ends of the left damping spring 233-2 act on the end surfaces of the second left damping convex tooth 233-3 and the corresponding limiting hole 101-2 facing the second left damping convex tooth 233-3 respectively;

an output shaft of a gear of the even-numbered gear set 22 in transmission connection with the right turning plate 242 sequentially passes through the corresponding first right damping convex tooth 243-1, the second right damping convex tooth 243-3, the right damping spring 243-2, the limiting hole 101-2 and the right top block 243-4 and is in transmission connection with the first right damping convex tooth 243-1 and the right top block 243-4, namely, the first right damping convex tooth 243-1, the right top block 243-4 and the output shaft are driven to rotate along with the rotation of the right turning plate 242, and the output shaft rotates in the second right damping convex tooth 243-3, the right damping spring 243-2 and the limiting hole 101-2; the two ends of the right damping spring 243-2 respectively act on the end surfaces of the second right damping convex tooth 243-3 and the corresponding limiting hole 101-2 facing the second right damping convex tooth 243-3; the second left damping convex tooth 233-3 and the second right damping convex tooth 243-3 which are positioned on the same side are connected into a whole through a connecting plate.

The holder 221 includes a first holder plate 221-1 and a second holder plate 221-2 disposed opposite to each other; the gears of the even gear set 22 are located between the first and second holding plates 221-1 and 221-2 and are rotatably disposed on the first and second holding plates 221-1 and 221-2; the first holding plate 221-1 is a part of the mounting base 21; the first holding plate 221-1 is provided with clamping through holes 221-3 corresponding to gears at two ends of the even gear set 22; output shafts are arranged on the gears at the two ends of the even gear group 22, and one end of each output shaft, which is positioned at the first retaining plate 221-1, is provided with a clamping head 222; the clamping through hole 221-3 comprises a through hole 221-3a for the output shaft of the corresponding gear to pass through and form coaxiality limitation, and an avoiding groove 221-3b for the chuck 222 to pass through; when the output shafts of the gears at the two ends pass through the clamping through hole 221-3, the clamping head 222 and the through hole 221-3a form limiting clamping through rotation.

Referring to fig. 13 to 15, the mobile terminal of the present invention includes the hinge mechanism for folding the screen, the left housing 4 and the right housing 6; the left casing 4 is fixedly connected with a second left connecting plate 231-2, and the right casing 6 is fixedly connected with a second right connecting plate 241-2; the left side casing 4 and the right side casing 6 are respectively provided with a left supporting plate 41 and a right supporting plate 61 which support the rotation of the flexible screen 7, and the left supporting plate 41 and the right supporting plate 61 are fixedly connected with the flexible screen 7.

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.