Folding hinge, folding hinge mechanism and mobile terminal

Abstract

The present invention relates to a folding hinge, a folding hinge mechanism and a mobile terminal, which are based on a folding hinge design, wherein the folding hinge includes a mounting base, and flip assemblies are symmetrically arranged on the left and right sides of the mounting base; a synchronous transmission gear set is arranged on the mounting base for synchronous rotation of the flip assemblies on both sides; the flip assembly includes a driving plate, a first flip plate, a second flip plate and a damping member for forming damped rotation when the flip assembly flips; the lower end of the first flip plate is rotatably connected to the mounting base, and the upper end of the first flip plate is rotatably connected to the driving plate; the second flip plate forms a sliding compensation fit with the driving plate; a guide slide groove is arranged on the first flip plate; and a limiter slidably matched with the guide slide groove is arranged on the second flip plate. The present invention can provide a larger accommodating space for the folding portion of the folding screen, reduce or avoid extrusion and collision caused by the folding portion of the folding screen, and at the same time, it can realize an anti-interference avoidance action during the folding process.

Description

Technical Field

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

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

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

[0004] The folding hinge mechanism of the current mobile terminal with a folding screen can have a complex mechanical structure. 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. At the same time, the hinge mounting seat of the folding hinge mechanism installed on the existing mobile terminal with a folding screen cannot be covered when it is fully opened, which affects the appearance. Summary of the invention

[0005] The first object of the present invention is to provide a folding hinge that can form an enlarged cavity when folded and can achieve anti-interference avoidance during the folding process.

[0006] The technical solution for achieving the first object of the present invention is as follows: the folding hinge in the present invention has a mounting base; flip assemblies are symmetrically arranged on the left and right sides of the mounting base; a synchronous transmission gear set is arranged on the mounting base for synchronous rotation of the flip assemblies on both sides; the flip assembly includes a driving plate, a first flip plate, a second flip plate and a damping member for forming a damped rotation when the flip assembly is flipped; the lower end of the first flip plate is rotatably connected to the mounting base, and the upper end of the first flip plate is rotatably connected to the driving plate; the upper end of the second flip plate is a compensation part, and the lower end of the second flip plate is a driving part; the compensation part of the second flip plate forms a sliding compensation fit with the driving plate; a rotationally movable member is arranged on the plane of the second flip plate directly facing the first flip plate. A guide slot guides downward and outward from top to bottom; a limiting body is provided on the compensation part of the second flip plate for inserting into the guide slot and slidingly cooperating with it; when the folding hinge is changed from a fully open state to a closed state, the driving plate gradually moves away from the mounting base under the sliding compensation effect with the second flip plate and the guiding effect of the limiting body under the guidance of the guide slot; the driving parts of the second flip plates on the left and right sides of the mounting base are matched with the synchronous transmission gear set, so that the flip plate assemblies on both sides are synchronously flipped through the synchronous transmission gear set; when the driving plate is in the closed state of the folding hinge, the upper ends of the first flip plates are close to each other, and the lower ends of the first flip plates are away from each other; and a cavity expanding outward is formed between the second flip plates.

[0007] When the folding hinge moves from a fully open state to a closed state, the driving plate gradually moves away from the mounting base and then gradually approaches the mounting base under the sliding compensation effect with the second flip plate and the guiding effect of the limiting body by the guiding groove.

[0008] The above-mentioned guide slide groove is composed of a first slide groove part and a second slide groove part that are connected to each other from top to bottom; when the limiting body moves from the upper end to the lower end of the first slide groove, the driving plate gradually moves away from the mounting base; when the limiting body is at the intersection of the first slide groove and the second slide groove, the distance between the driving plate and the mounting base is the farthest; when the limiting body moves from the upper end to the lower end of the second slide groove, the driving plate gradually approaches the mounting base.

[0009] Furthermore, the first slide groove and the second slide groove are both arc-shaped grooves; and the guide slide groove formed by the first slide groove and the second slide groove is wavy.

[0010] The synchronous transmission gear set is an even-numbered gear set, and the driving parts of the second flip plates on the left and right sides of the mounting base are respectively connected to the gears on both sides of the even-numbered gear set.

[0011] As a variant design, the above synchronous transmission gear set includes a first bevel gear, an intermediate bevel gear and a second bevel gear; the first bevel gear is parallel to the rotation axis of the second bevel gear, and the rotation axis of the intermediate bevel gear is perpendicular to the rotation axis of the first bevel gear; the first bevel gear and the second bevel gear are located on both sides of the intermediate bevel gear, and the first bevel gear and the second bevel gear are both matched with the intermediate bevel gear in transmission; the first bevel gear and the second bevel gear rotate synchronously in opposite directions through the intermediate bevel gear;

[0012] The first bevel gear and the second bevel gear are respectively connected to the driving parts of the second flip plates on the left and right sides of the mounting base.

[0013] The lower end of the first flip plate is rotatably connected to the mounting base through a compensation slider; the mounting base and the outer side of the compensation slider form a virtual axis rotation fit; the lower end of the first flip plate and the inner side of the compensation slider form a virtual axis rotation fit.

[0014] The above-mentioned compensation slider is provided with a first limit slot; a first limit block is provided at one end of the first flip plate that rotates with the compensation slider; the first limit block is set in the first limit slot as the first flip plate and the compensation slider rotate relative to each other; when the driving plate is in a closed state, the first limit block is located at one end of the first limit slot, and forms a limit fit with the first limit slot to limit the first flip plate from continuing to flip toward the closing direction of the driving plate.

[0015] The above-mentioned driving plate is provided with an arc-shaped compensation groove; the compensation part of the second flip plate is rotatably provided with a pin shaft; the second flip plate and the driving plate are inserted into the arc-shaped compensation groove through one end of the pin shaft to form a sliding compensation fit; the other end of the pin shaft is a limiting body, which is inserted into the guide groove and slides with it.

[0016] An arc-shaped limit block is rotatably provided at one end of the pin shaft inserted into the arc-shaped compensation sliding groove; the arc-shaped limit block is slidably arranged in the arc-shaped compensation sliding groove; the outer arc surface of the arc-shaped limit block contacts and cooperates with the outer arc surface of the arc-shaped compensation sliding groove, and the inner arc surface of the arc-shaped limit block contacts and cooperates with the inner arc surface of the arc-shaped compensation sliding groove.

[0017] The above-mentioned mounting base includes a connecting base plate and a cover plate; the cover plate is located above the connecting base plate, and a channel connected to the outside and used for connecting bolts to enter is formed between the cover plate and the connecting base plate; a connecting hole is provided on the connecting base plate located in the channel and cooperates with the connecting bolts entering from the channel; a through hole is provided on the cover plate directly above the connecting hole.

[0018] The above-mentioned damping member includes a first damping tooth which is arranged on the driving part of the second flip plate and rotates coaxially with the driving part, and a second damping tooth which seeks to engage with the first damping tooth under the action of a damping spring; as the flip assembly rotates, the first damping tooth and the second damping tooth on the corresponding side form a damped rotation through the distance difference formed during the continuous engagement process.

[0019] The output shaft of the gear in the synchronous transmission gear set that is in transmission cooperation with the driving part of the second flip plate passes through the driving part, the second damping cam and the damping spring in sequence; the damping spring acts on the mounting base and the second damping cam respectively; the output shaft of the gear that is in transmission cooperation with the driving part of the second flip plate forms a circumferential transmission cooperation with the driving part of the second flip plate; the output shaft of the gear that is in transmission cooperation with the driving part of the second flip plate can rotate in the second damping cam and the damping spring without driving the second damping cam and the damping spring to rotate.

[0020] The above-mentioned mounting base includes a reference body, a retaining frame, and a limit frame; the reference body is rotatably connected to the first flip plate; the retaining frame is fixedly installed on the reference body; the synchronous transmission gear set is rotatably set on the retaining frame, and the limit frame is fixedly installed on the retaining frame; the output shaft of the gear that cooperates with the driving part of the second flip plate is rotatably connected to the limit frame after passing through the driving part, the second damping tooth and the damping spring in sequence; the two ends of the damping spring act on the limit frame and the second damping tooth respectively; the second damping teeth located on the left and right sides of the mounting base are connected into one by a connecting rod.

[0021] The second object of the present invention is to provide a folding hinge mechanism, which can provide a larger accommodating space for the folding part of the folding screen, reduce or avoid the extrusion and collision caused by the folding part of the folding screen, and at the same time it can realize anti-interference avoidance action during the folding process.

[0022] The technical solution for achieving the second purpose of the present invention is: the folding hinge mechanism in the present invention includes a hinge mounting seat, a plurality of the above-mentioned folding hinges, and a support plate for supporting the folding part of the folding screen; a plurality of folding hinges are fixedly mounted on the hinge mounting seat along the extension direction of the hinge mounting seat; a support plate is provided between the first flip plates on the same side of adjacent folding hinges, and both ends of the support plate are respectively fixedly connected to the corresponding first flip plates.

[0023] The third object of the present invention is to provide a mobile terminal using the above-mentioned folding hinge mechanism, which can effectively reduce or even avoid the extrusion and collision of the folding part of the flexible screen, and can cover the hinge mounting seat when it is fully opened, so that the appearance of the product is more beautiful; at the same time, when folding and closing, it can prevent the left and right casings from interfering and colliding with the hinge mounting seat through anti-interference avoidance.

[0024] The technical solution for achieving the third purpose of the present invention is: the mobile terminal in the present invention includes the above-mentioned folding hinge mechanism; it also includes a flexible screen, a left casing and a right casing; the inner sides of the left casing and the right casing are respectively installed with a left support plate and a right support plate for supporting the rotation of the flexible screen, and the left support plate and the right support plate are fixedly connected to the flexible screen; the left casing is fixedly connected to the driving plate of the flip assembly on the left side of each folding hinge; the right casing is fixedly connected to the driving plate of the flip assembly on the right side of each folding hinge; when the folding hinge is fully opened, the left casing and the right casing wrap the hinge mounting seat.

[0025] The present invention has positive effects: (1) The folding hinge of the present invention can provide a larger cavity for the folding part of the subsequent folding screen when folded and retracted through multiple compensatory sliding, thereby preventing damage to the folding part of the folding screen; at the same time, the guide groove can enable the drive plate to perform anti-interference avoidance action, so that the mobile terminal using the folding hinge can cover the hinge mounting seat when fully opened, thereby improving the overall aesthetics and effectively avoiding the problem of flipping interference.

[0026] (2) In the present invention, the driving plate gradually moves away from the mounting base and then gradually approaches the mounting base under the sliding compensation effect with the second flip plate and the guiding effect of the limiter under the guiding groove. This design can make an evasive action only when it is flipped to the point where evasion is required. At other times, the driving plate and the mounting base can maintain a minimum gap, so that when the mobile terminal using the folding hinge is in the closed state and the fully opened state, the gap between the left and right housings and the hinge mounting base can be minimized, thereby improving the user experience.

[0027] (3) The guide chute in the present invention is wavy in shape, which can make the avoidance action smoother and more continuous.

[0028] (4) The synchronous transmission gear set in the present invention adopts a matching mode of the first helical gear, the intermediate helical gear and the second helical gear, which can reduce the number of gears while ensuring synchronous rotation.

[0029] (5) In the present invention, the lower end of the first flip plate is rotatably connected to the mounting base via a compensating slider, which can increase the outward expansion angle of the lower end of the first flip plate, thereby providing a larger accommodating space for the folding portion of the folding screen.

[0030] (6) The present invention can ensure the verticality of the driving plate through the limiting cooperation between the first limiting sliding groove and the first limiting block, thereby ensuring that the closing will not over-rotate.

[0031] (7) The design of the pin shaft on the compensation part of the present invention can simultaneously solve the coordination with the arc-shaped compensation groove on the driving plate and the sliding coordination with the guide groove. The structure is simple and effective, and the design is ingenious.

[0032] (8) The present invention can increase the contact area and improve the stability of the folding hinge by cooperating with the arc-shaped limit block and the arc-shaped compensating sliding groove.

[0033] (9) The channel design on the mounting base in the present invention can hide the fixed connection for mounting the base, thus playing a good anti-disassembly function.

[0034] (10) The damping member in the present invention can lock the flip assembly during the flipping process, thereby improving the flipping feel. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments and in conjunction with the accompanying drawings, wherein

[0036] Figure 1 It is a structural schematic diagram of the folding hinge in the present invention in a fully opened state;

[0037] Figure 2 It is a schematic diagram of the structure of the folding hinge in the present invention when it is flipped 90 degrees;

[0038] Figure 3 It is a structural schematic diagram of the folding hinge in the present invention in a fully closed state;

[0039] Figure 4 It is a schematic structural diagram of the first flip plate in the present invention;

[0040] Figure 5 is a schematic structural diagram of the second flip plate in the present invention;

[0041] Figure 6 It is a structural schematic diagram of the driving plate in the present invention;

[0042] Figure 7 It is a schematic diagram of the structure of the compensation slider in the present invention;

[0043] Figure 8 It is a structural schematic diagram of the installation base in the present invention;

[0044] Fig. 9 It is a structural schematic diagram of the folding hinge mechanism of the present invention in a fully opened state;

[0045] Fig.10 It is a schematic diagram of the structure of the folding hinge mechanism of the present invention when it is flipped 90 degrees;

[0046] Fig.11 It is a structural schematic diagram of the folding hinge mechanism in the present invention in a fully closed state;

[0047] Fig.12 It is a structural schematic diagram of the mobile terminal in the present invention in a fully opened state;

[0048] Fig.13 It is a schematic diagram of the structure of the mobile terminal in the present invention when it is flipped 90 degrees;

[0049] Fig.14 It is a structural schematic diagram of the mobile terminal in the present invention in a completely closed state; DETAILED DESCRIPTION

[0050] See Figures 1 to 8 The folding hinge of the present invention comprises a mounting base 1; a flip assembly 2 is symmetrically arranged on the left and right sides of the mounting base 1; a synchronous transmission gear set 3 is arranged on the mounting base 1 for synchronous rotation of the flip assemblies 2 on both sides; the flip assembly 2 comprises a driving plate 21, a first flip plate 22, a second flip plate 23 and a damping member 24 for forming a damped rotation when the flip assembly 2 is flipped; the lower end of the first flip plate 22 is rotatably connected to the mounting base 1 through a compensation slider 25; the mounting base 1 forms a virtual axis rotation fit with the outer side of the compensation slider 25; the lower end of the first flip plate 22 forms a virtual axis rotation fit with the inner side of the compensation slider 25.

[0051] The virtual axis rotation fit is the rotation fit of the arc groove and the arc slider.

[0052] The compensation slider 25 is provided with a first limiting slot 251; a first limiting block 221 is provided at one end of the first flip plate 22 that rotates with the compensation slider 25; the first limiting block 221 is set in the first limiting slot 251 as the first flip plate 22 and the compensation slider 25 rotate and slide relative to each other; when the driving plate 21 is in a closed state, the first limiting block 221 is located at one end of the first limiting slot 251, and forms a limiting cooperation with the first limiting slot 251 to limit the first flip plate 22 from continuing to flip toward the closing direction of the driving plate 21.

[0053] The upper end of the first flip plate 22 is rotatably connected to the middle part of the driving plate 21 via a rotating shaft; the upper end of the second flip plate 23 is a compensation part, and the lower end of the second flip plate 23 is a driving part 231 .

[0054] The driving plate 21 is provided with an arc-shaped compensation groove 211; the compensation part of the second flip plate 23 is rotatably provided with a pin shaft 232; one end of the pin shaft 232 is rotatably provided with an arc-shaped limit block 233 that can form relative sliding in the arc-shaped compensation groove 211; the second flip plate 23 and the driving plate 21 are inserted into the arc-shaped compensation groove 211 through the arc-shaped limit block 233 to form a sliding compensation fit; the outer arc surface of the arc-shaped limit block 233 contacts and cooperates with the outer arc surface of the arc-shaped compensation sliding groove 211, and the inner arc surface of the arc-shaped limit block 233 contacts and cooperates with the inner arc surface of the arc-shaped compensation sliding groove 211.

[0055] A guide groove 222 guiding from top to bottom and outward is provided on the plane of the second flip plate 23 directly facing the first flip plate 22; a limiting body for inserting into the guide groove 222 and slidingly cooperating therewith is provided on the compensation part of the second flip plate 23; the other end of the pin shaft 232 is a limiting body, which is inserted into the guide groove 222 and slidingly cooperating therewith.

[0056] When the folding hinge moves from a fully open state to a closed state, the driving plate 21 gradually moves away from the mounting base and then gradually approaches the mounting base under the sliding compensation effect with the second flip plate 23 and the guiding effect of the limiting body under the guiding groove 222.

[0057] In order to complete the above-mentioned action, the guide slot 222 is composed of a first slot portion 222-1 and a second slot portion 222-2 connected to each other from top to bottom; when the limiting body moves from the upper end to the lower end of the first slot 222-1, the driving plate 21 gradually moves away from the mounting base 1; when the limiting body is at the intersection of the first slot 222-1 and the second slot 222-2, the driving plate 21 is farthest from the mounting base 1; when the limiting body moves from the upper end to the lower end of the second slot 222-2, the driving plate 21 gradually approaches the mounting base 1. The first slot 222-1 and the second slot 222-2 are both arc slots; the guide slot 222 formed by the first slot 222-1 and the second slot 222-2 is wavy. Of course, first slots 222-1 and second slots 222-2 of other shapes are within the protection scope of this application as long as they can complete the above-mentioned actions.

[0058] The driving part 231 of the second flip plate 23 on the left and right sides of the mounting base 1 cooperates with the synchronous transmission gear set 3, so that the flip plate assemblies 2 on both sides are synchronously flipped through the synchronous transmission gear set 3; when the driving plate 21 is in the closed state of the folding hinge, the upper ends of the first flip plates 22 are close to each other, and the lower ends of the first flip plates 22 are away from each other; and an outward-expanding cavity is formed between the second flip plates 23.

[0059] The synchronous transmission gear set 3 includes a first bevel gear 31, an intermediate bevel gear 32 and a second bevel gear 33; the first bevel gear 31 and the second bevel gear 33 have rotation axes parallel to each other, and the rotation axis of the intermediate bevel gear 32 is perpendicular to the rotation axis of the first bevel gear 31; the first bevel gear 31 and the second bevel gear 32 are located on both sides of the intermediate bevel gear 32, and both the first bevel gear 31 and the second bevel gear 33 are in transmission cooperation with the intermediate bevel gear 32; the first bevel gear 31 and the second bevel gear 33 rotate synchronously in opposite directions through the intermediate bevel gear 32. Of course, the synchronous transmission gear set 3 can also adopt an even-numbered gear set.

[0060] The first bevel gear 31 and the second bevel gear 33 are respectively connected to the driving parts 231 of the second flip plates 23 on the left and right sides of the mounting base 1 .

[0061] The mounting base 1 comprises a connecting base plate 11 and a cover plate 12; the cover plate 12 is located above the connecting base plate 11, and a channel 13 is formed between the cover plate 12 and the connecting base plate 11, which is connected to the outside and is used for the connecting bolts to enter; the connecting base plate 11 is provided with a connecting hole 111 in the channel 13, which is matched with the connecting bolts entering from the channel 13; the cover plate 12 is provided with a through hole 121 just above the connecting hole 111. After the connecting bolt is placed into the connecting hole 111 from the channel 13, a tool can be inserted from the through hole 121 to tighten the connecting bolt.

[0062] The damping member 24 includes a first damping tooth 241 which is arranged on the driving portion 231 of the second flip plate 23 and rotates coaxially with the driving portion 231, and a second damping tooth 243 which seeks to engage with the first damping tooth 241 under the action of a damping spring 242; as the flip assembly 2 rotates, the first damping tooth 241 and the second damping tooth 243 on the corresponding side form a damped rotation through the distance difference formed during the continuous engagement process.

[0063] The output shaft of the gear in the synchronous transmission gear set 3 that is in transmission cooperation with the driving part 231 of the second flip plate 23 passes through the driving part 231, the second damping tooth 243 and the damping spring 242 in sequence; the damping spring 242 acts on the mounting base 1 and the second damping tooth 243 respectively; the output shaft of the gear that is in transmission cooperation with the driving part 231 of the second flip plate 23 forms a circumferential transmission cooperation with the driving part 231 of the second flip plate 23; the output shaft of the gear that is in transmission cooperation with the driving part 231 of the second flip plate 23 can rotate in the second damping tooth 243 and the damping spring 242 without driving the second damping tooth 243 and the damping spring 242 to rotate.

[0064] The mounting base 1 includes a reference body 14, a retaining frame 15, and a limiting frame 16; the reference body 14 is rotatably connected to the first flip plate 22; the retaining frame 15 is fixedly installed on the reference body 14; the synchronous transmission gear set 3 is rotatably set on the retaining frame 15, and the limiting frame 16 is fixedly installed on the retaining frame 15; the output shaft of the gear that is transmission-matched with the driving part 231 of the second flip plate 23 passes through the driving part 231, the second damping tooth 243 and the damping spring 242 in sequence and is rotatably connected to the limiting frame 16; the two ends of the damping spring 242 act on the limiting frame 16 and the second damping tooth 243 respectively; the second damping teeth 243 located on the left and right sides of the mounting base 1 are connected into one by a connecting rod.

[0065] See Figures 9 to 11The folding hinge mechanism of the present invention includes a hinge mounting seat 4, two of the above-mentioned folding hinges, and a support plate 5 for supporting the folding part of the folding screen; the two folding hinges are fixedly mounted on the hinge mounting seat 4 along the extension direction of the hinge mounting seat 4; a support plate 5 is provided between the first flip plates 22 on the same side of adjacent folding hinges, and the two ends of the support plate 5 are respectively fixedly connected to the corresponding first flip plates 22.

[0066] See Figures 12 to 14 The mobile terminal in the present invention includes the above-mentioned folding hinge mechanism; it also includes a flexible screen 6, a left casing 7 and a right casing 8; the inner sides of the left casing 7 and the right casing 8 are respectively installed with a left support plate and a right support plate for supporting the rotation of the flexible screen, and the left support plate and the right support plate are fixedly connected to the flexible screen; the left casing 7 is fixedly connected to the upper end of the driving plate 21 of the flip assembly 2 on the left side of each folding hinge; the right casing 8 is fixedly connected to the driving plate 21 of the flip assembly 2 on the right side of each folding hinge; when the folding hinge is fully opened, the left casing 7 and the right casing 8 wrap the hinge mounting seat 4.

[0067] The action process of the mobile terminal in the present invention is as follows:

[0068] From the closed state to the fully open state: by manually flipping down the left housing 7 and / or the right housing 8, the driving plate 21 is driven to flip downward, and the downward flipping of the driving plate 21 drives the first flip plate 22 and the second flip plate 23 to rotate downward; at the same time, under the action of the synchronous transmission gear set 3, the flip assemblies 2 on the left and right sides are synchronously rotated in opposite directions; during the rotation process, the second flip plate 23 realizes damped rotation under the action of the damping member 24, and can be stopped halfway; at the same time, when the limiting body slides from bottom to top in the second slide groove 222-2, the left housing 7 and the right housing 8 are urged to move away from the hinge mounting seat 4; when the limiting body enters the first slide groove 222-1 and slides from bottom to top, the left housing 7 and the right housing 8 are urged to move toward the hinge mounting seat 4. When fully opened, the left housing 7 and the right housing 8 completely cover the hinge mounting seat 4 and form a splicing on the back of the mobile terminal.

[0069] The action process from the fully open state to the closed state is the opposite.

[0070] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A folding hinge having a mounting base; characterized in that: The left and right sides of the mounting base are symmetrically provided with flip assemblies; the mounting base is provided with a synchronous transmission gear set for synchronous rotation of the flip assemblies on both sides; the flip assembly includes a driving plate, a first flip plate, a second flip plate and a damping member for forming a damped rotation when the flip assembly flips; the lower end of the first flip plate is rotatably connected to the mounting base, and the upper end of the first flip plate is rotatably connected to the driving plate; the upper end of the second flip plate is a compensation part, and the lower end of the second flip plate is a driving part; the compensation part of the second flip plate forms a sliding compensation fit with the driving plate; a guide groove guiding from top to bottom to the outside is provided on the plane of the second flip plate directly facing the first flip plate; the second flip plate The compensation part of the rotating plate is provided with a limiting body for inserting into the guide slide groove and slidingly cooperating with the same; when the folding hinge is changed from a fully opened state to a closed state, the driving plate has a movement of gradually moving away from the mounting base under the sliding compensation effect with the second flip plate and the guiding effect of the limiting body under the guiding groove; the driving parts of the second flip plates on the left and right sides of the mounting base are in transmission cooperation with the synchronous transmission gear set, so that the flip plate assemblies on both sides are synchronously flipped through the synchronous transmission gear set; when the driving plate is in the closed state of the folding hinge, the upper ends of the first flip plates are close to each other, and the lower ends of the first flip plates are away from each other; and a cavity expanding outward is formed between the second flip plates; When the folding hinge moves from a fully open state to a closed state, the driving plate gradually moves away from the mounting base and then gradually approaches the mounting base under the sliding compensation effect with the second flip plate and the guiding effect of the limiting body under the guiding groove; The guide slide groove is composed of a first slide groove portion and a second slide groove portion connected to each other from top to bottom; when the limiting body moves from the upper end to the lower end of the first slide groove, the driving plate gradually moves away from the mounting base; when the limiting body is at the intersection of the first slide groove and the second slide groove, the distance between the driving plate and the mounting base is the farthest; when the limiting body moves from the upper end to the lower end of the second slide groove, the driving plate gradually approaches the mounting base; The first slide groove and the second slide groove are both arc-shaped grooves; the guide slide groove formed by the first slide groove and the second slide groove is wavy; The lower end of the first flip plate is rotatably connected to the mounting base through a compensation slider; the mounting base and the outer side of the compensation slider form a virtual axis rotation fit; the lower end of the first flip plate and the inner side of the compensation slider form a virtual axis rotation fit; A first limiting slot is provided on the compensation slider; a first limiting block is provided at one end of the first flip plate that rotates with the compensation slider; the first limiting block is set in the first limiting slot as the first flip plate and the compensation slider rotate and slide relative to each other; when the driving plate is in a closed state, the first limiting block is located at one end of the first limiting slot, and forms a limiting cooperation with the first limiting slot to limit the first flip plate from continuing to flip toward the closing direction of the driving plate.

2. The folding hinge according to claim 1, characterized in that: The synchronous transmission gear set is an even-numbered gear set, and the driving parts of the second flip plates on the left and right sides of the mounting base are respectively connected to the gears on both sides of the even-numbered gear set.

3. The folding hinge according to claim 1, characterized in that: The synchronous transmission gear set includes a first helical gear, an intermediate helical gear and a second helical gear; the first helical gear is parallel to the rotation axis of the second helical gear, and the rotation axis of the intermediate helical gear is perpendicular to the rotation axis of the first helical gear; the first helical gear and the second helical gear are located on both sides of the intermediate helical gear, and the first helical gear and the second helical gear are both matched with the intermediate helical gear in transmission; the first helical gear and the second helical gear rotate synchronously in opposite directions through the intermediate helical gear; The first bevel gear and the second bevel gear are respectively connected to the driving parts of the second flip plates on the left and right sides of the mounting base.

4. The folding hinge according to claim 1, characterized in that: The driving plate is provided with an arc-shaped compensation groove; the compensation part of the second flip plate is rotatably provided with a pin shaft; the second flip plate and the driving plate are inserted into the arc-shaped compensation groove through one end of the pin shaft to form a sliding compensation fit; the other end of the pin shaft is a limiting body, which is inserted into the guide groove and slides with it.

5. The folding hinge according to claim 4, characterized in that: An arc-shaped limit block is rotatably provided at one end of the pin shaft inserted into the arc-shaped compensation sliding groove; the arc-shaped limit block is slidably arranged in the arc-shaped compensation sliding groove; the outer arc surface of the arc-shaped limit block contacts and cooperates with the outer arc surface of the arc-shaped compensation sliding groove, and the inner arc surface of the arc-shaped limit block contacts and cooperates with the inner arc surface of the arc-shaped compensation sliding groove.

6. The folding hinge according to claim 1, characterized in that: The mounting base includes a connecting base plate and a cover plate; the cover plate is located above the connecting base plate, and a channel connected to the outside and used for connecting bolts to enter is formed between the cover plate and the connecting base plate; the connecting base plate is provided with connecting holes located in the channel that cooperate with the connecting bolts entering from the channel; the cover plate is provided with a through hole directly above the connecting hole.

7. The folding hinge according to claim 1, characterized in that: The damping member includes a first damping tooth which is arranged on the driving part of the second flip plate and rotates coaxially with the driving part, and a second damping tooth which seeks to engage with the first damping tooth under the action of a damping spring; as the flip assembly rotates, the first damping tooth and the second damping tooth on the corresponding side form a damped rotation through the distance difference formed during the continuous engagement process.

8. The folding hinge according to claim 7, characterized in that: The output shaft of the gear in the synchronous transmission gear set that is in transmission cooperation with the driving part of the second flip plate passes through the driving part, the second damping cam and the damping spring in sequence; the damping spring acts on the mounting base and the second damping cam respectively; the output shaft of the gear that is in transmission cooperation with the driving part of the second flip plate forms a circumferential transmission cooperation with the driving part of the second flip plate; the output shaft of the gear that is in transmission cooperation with the driving part of the second flip plate can rotate in the second damping cam and the damping spring without driving the second damping cam and the damping spring to rotate.

9. The folding hinge according to claim 8, characterized in that: The mounting base includes a reference body, a retaining frame, and a limit frame; the reference body is rotatably connected to the first flip plate; the retaining frame is fixedly mounted on the reference body; the synchronous transmission gear set is rotatably set on the retaining frame, and the limit frame is fixedly mounted on the retaining frame; the output shaft of the gear that cooperates with the driving part of the second flip plate is rotatably connected to the limit frame after passing through the driving part, the second damping tooth and the damping spring in sequence; the two ends of the damping spring act on the limit frame and the second damping tooth respectively; the second damping teeth located on the left and right sides of the mounting base are connected into one by a connecting rod.

10. Folding hinge mechanism, characterized in that: It includes a hinge mounting seat, multiple folding hinges as described in claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9, and a support plate for supporting the folding part of the folding screen; multiple folding hinges are fixedly mounted on the hinge mounting seat along the extension direction of the hinge mounting seat; support plates are provided between the first flip plates on the same side of adjacent folding hinges, and both ends of the support plates are respectively fixedly connected to the corresponding first flip plates.

11. A mobile terminal, characterized in that: The invention comprises the folding hinge mechanism as claimed in claim 10; further comprising a flexible screen, a left housing and a right housing; a left support plate and a right support plate for supporting the rotation of the flexible screen are respectively installed on the inner sides of the left housing and the right housing, and the left support plate and the right support plate are fixedly connected to the flexible screen; The left side housing is fixedly connected to the driving plate of the flip assembly on the left side of each folding hinge; the right side housing is fixedly connected to the driving plate of the flip assembly on the right side of each folding hinge; when the folding hinge is fully opened, the left side housing and the right side housing wrap the hinge mounting seat.

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