Hinge for inward-folding flexible screen mobile terminal

Abstract

The present disclosure provides a hinge for an inward-folding flexible screen mobile terminal, including an intermediate bracket, a left support plate, a right support plate and a synchronous reverse rotation mechanism, the synchronous reverse rotation mechanism including a left rotating arm, a right rotating arm and two external gears arranged on the intermediate bracket, a first arc-shaped sliding portion is arranged at one end of the left rotating arm, a first internal tooth structure matched with one of the external gears is arranged on the inner side of the first arc-shaped sliding portion, a second arc-shaped sliding portion is arranged at one end of the right rotating arm, a second internal tooth structure matched with the other external gear is arranged on the inner side of the second arc-shaped sliding portion. The present disclosure can realize the unfolding and inward folding of the corresponding flexible screen, the structure is more compact and stable, the structure is simplified, the volume is reduced, an inverted V-shaped avoidance interval can be formed between the left support plate and the right support plate, which is convenient for the flexible screen to curl freely at the bend to form a water drop shape, and can reduce the stress inside the flexible screen and avoid damage to the flexible screen.

Description

Technical Field

[0001] The present disclosure relates to a flexible screen electronic device, and in particular to a hinge for an inward-folding flexible screen mobile terminal. Background Art

[0002] With the continuous progress of society and the rapid development of science and technology, electronic products are updated very quickly. Users have higher and higher requirements for the use of electronic products, resulting in more and more diversified functions of electronic products, and many new forms of electronic products have emerged. For example, mobile terminals such as smart phones and tablets with flexible screens will become the current research and development hotspots and new trends. For mobile terminals, flexible screens are an ideal and emerging screen. The mobile terminal is folded when carried and flattened when used to get double display, which meets the demand for large-screen display and can give people a sense of implicitness, maturity, and stability. At present, for mobile terminals with flexible screens, the problem that needs to be solved is how to design a folding mechanism to support and fold the flexible screen, reduce damage to the bend of the flexible screen, improve the stability, reliability, operating feel, comfort, etc. of the rotation and folding, and increase the service life, so that the flexible screen can be better applied to mobile terminals. Summary of the invention

[0003] The purpose of the present disclosure is to provide a hinge for an inward-folding flexible screen mobile terminal, which can solve at least one of the above technical problems. The technical solution of the present disclosure is as follows:

[0004] The hinge of the embodiment of the present invention is a hinge for an inwardly folding flexible screen mobile terminal, comprising an intermediate bracket, a left support plate, a right support plate and a synchronous reverse rotation mechanism, wherein the synchronous reverse rotation mechanism comprises a left rotating arm, a right rotating arm and two external gears arranged on the intermediate bracket, one end of the left rotating arm is provided with a first arc-shaped sliding portion, and the other end of the left rotating arm is hinged to an end of the left support plate away from the intermediate bracket, the inner side of the first arc-shaped sliding portion is provided with a first internal tooth structure matching with one of the external gears, one end of the right rotating arm is provided with a second arc-shaped sliding portion, and the other end of the right rotating arm is hinged to an end of the right support plate away from the intermediate bracket, the inner side of the second arc-shaped sliding portion is provided with a second internal tooth structure matching with another external gear, the intermediate bracket is provided with a first arc-shaped sliding groove matching with the first arc-shaped sliding portion and a second arc-shaped sliding groove matching with the second arc-shaped sliding portion, the left rotating arm and the right rotating arm can rotate synchronously in the opposite directions, and as the left rotating arm and the right rotating arm rotate inwardly and close, the left support plate and the right support plate can swing outwards respectively.

[0005] In some embodiments, the rotation center of the left rotating arm is the same as the rotation center of the right rotating arm. As the left rotating arm and the right rotating arm rotate outward to open and flatten, the first arc-shaped sliding portion close to the top of one end of the right support plate can support the right support plate, and the second arc-shaped sliding portion close to the top of one end of the left support plate can support the left support plate.

[0006] In some embodiments, as the left rotating arm and the right rotating arm rotate outward to open and flatten, the rotation centers of the left rotating arm and the right rotating arm are located above the left supporting plate and the right supporting plate.

[0007] In some embodiments, the left support plate and the right support plate have the same structure, and the left rotating arm and the right rotating arm have the same structure. A first avoidance hole is provided on the left support plate, a first protrusion is provided on the upper part of one end of the first arc-shaped sliding portion close to the right support plate, a second avoidance hole is provided on the right support plate, and a second protrusion is provided on the upper part of one end of the second arc-shaped sliding portion close to the left support plate. As the left rotating arm and the right rotating arm rotate outward to open and flatten, the top of one end of the first arc-shaped sliding portion close to the right support plate is inserted into the second avoidance hole, and the first protrusion abuts on the bottom surface of the right support plate for support, and the top of one end of the second arc-shaped sliding portion close to the left support plate is inserted into the first avoidance hole, and the second protrusion abuts on the bottom surface of the left support plate for support.

[0008] In some embodiments, a first rotating shaft is provided on the left support plate, a first connecting hole hinged to the first rotating shaft is provided on the left rotating arm, a second rotating shaft is provided on the right support plate, and a second connecting hole hinged to the second rotating shaft is provided on the right rotating arm.

[0009] In some embodiments, a first torsion spring cooperating with the left rotating arm is provided on the first rotating shaft, a first limiting portion cooperating with the left support plate is provided on the left rotating arm, a second torsion spring cooperating with the right rotating arm is provided on the second rotating shaft, and a second limiting portion cooperating with the right support plate is provided on the right rotating arm. As the left rotating arm and the right rotating arm rotate inward and close, the first torsion spring can make the left support plate abut against the first limiting portion, and the second torsion spring can make the right support plate abut against the second limiting portion. As the left rotating arm and the right rotating arm rotate outward and open and flatten, the twisted first torsion spring can press the left support plate against the second protrusion, and the twisted second torsion spring can press the right support plate against the first protrusion.

[0010] In some embodiments, the synchronous reverse rotation mechanism also includes a first cam cooperating with the first arc-shaped sliding portion, a second cam cooperating with the second arc-shaped sliding portion, and a first elastic member cooperating with the first cam and the second cam. The first arc-shaped sliding portion is axially fixed, and the second arc-shaped sliding portion is axially fixed. The first elastic member can make the first cam elastically cooperate with the third cam on one side of the first arc-shaped sliding portion, and the first elastic member can make the second cam elastically cooperate with the fourth cam on one side of the second arc-shaped sliding portion.

[0011] In some embodiments, the external gear is connected to the first connecting shaft, the external gear corresponds to the first connecting shaft one by one, the two ends of the two first connecting shafts are respectively connected by a first connecting piece, the first cam is fixed to the two first connecting shafts in the circumferential direction and can slide relative to each other in the axial direction, the second cam is fixed to the two first connecting shafts in the circumferential direction and can slide relative to each other in the axial direction, the first arc-shaped sliding portion and the second arc-shaped sliding portion are located between the first cam and the second cam, the first elastic member is a spring respectively mounted on the first connecting shaft, one end of each first elastic member is pressed against the first cam and the other end thereof is pressed against the first connecting piece.

[0012] In some embodiments, the first cam and the second cam have the same structure, first sliders are respectively provided on both sides of the first cam, and two first sliding grooves respectively matched with the two first sliders are provided on the middle bracket, and the two first sliding grooves are arranged along the axial direction of the first connecting shaft.

[0013] In some embodiments, a first fixing block is disposed on the intermediate bracket, and the first arc-shaped sliding groove, the second arc-shaped sliding groove and the first sliding groove are disposed on the first fixing block.

[0014] The beneficial effects of the present invention are as follows: the first arc-shaped sliding part rotates along the first arc-shaped sliding groove, and at the same time, the first internal tooth structure on the first arc-shaped sliding part meshes and rotates with an external gear, and the second arc-shaped sliding part rotates along the second arc-shaped sliding groove, and at the same time, the second internal tooth structure on the second arc-shaped sliding part meshes and rotates with another external gear, so that the left rotating arm and the right rotating arm can rotate synchronously in opposite directions, that is, the corresponding flexible screen can be opened, flattened, and folded inwardly and closed. The first internal tooth structure is arranged on the first arc-shaped sliding part, and the second internal tooth structure is arranged on the second arc-shaped sliding part. The structure is more compact and stable, the structure is simplified, and the volume is reduced. As the left turning arm and the right rotating arm rotate synchronously in opposite directions, the corresponding flexible screen can be opened, flattened, and folded inwardly and closed. The movable arm and the right rotating arm rotate inward and close, and the left support plate can rotate outward with the hinge of the left rotating arm and the left support plate as the center. At the same time, the right support plate can rotate outward with the hinge of the right rotating arm and the right support plate as the center, so that an inverted V-shaped avoidance interval can be formed between the left support plate and the right support plate, which is convenient for the flexible screen to curl freely at the bend to form a water drop shape, can reduce the stress inside the flexible screen, avoid damage to the flexible screen, etc., is easy to operate, has high stability and reliability, and improves the service life of the product, so that the flexible screen can be better applied to various mobile terminals such as mobile phones and tablets, thereby expanding the application and development of the product.

[0015] In addition, in the technical solution disclosed in the present invention, unless otherwise specified, the technical solution can be implemented by adopting conventional means in the art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the specific embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic structural diagram of a hinge for an inward-folding flexible screen mobile terminal according to an embodiment of the present invention.

[0018] Figure 2 An exploded view of an inward-folding flexible screen mobile terminal according to an embodiment of the present disclosure.

[0019] Figure 3 This is a schematic diagram of the structure of an inward-folding flexible screen mobile terminal opened to a flat state according to an embodiment of the present invention.

[0020] Figure 4 This is a schematic diagram of the structure of an inwardly folded flexible screen mobile terminal in an inwardly folded closed state according to an embodiment of the present invention.

[0021] Figure 5 It is a schematic diagram of the local structure of the first torsion spring of an embodiment of the present disclosure.

[0022] Figure 6 It is a structural schematic diagram of a synchronous reverse rotation mechanism and a first fixed block according to an embodiment of the present invention.

[0023] Figure 7 It is a schematic structural diagram of a first fixing block according to an embodiment of the present disclosure.

[0024] Figure 8 It is a schematic structural diagram of a left rotating arm, a right rotating arm, a first cam and a second cam according to an embodiment of the present invention.

[0025] Fig. 9 It is a schematic diagram of the local structure of the second torsion spring of an embodiment of the present disclosure.

[0026] The reference numerals in the accompanying drawings are as follows: intermediate bracket 1, first arc-shaped slide groove 101, second arc-shaped slide groove 102, first slide groove 103, first fixed block 11, left support plate 2, first rotating shaft 21, first torsion spring 22, first avoidance hole 23, right support plate 3, second rotating shaft 31, second torsion spring 32, second avoidance hole 33, synchronous reverse rotation mechanism 4, left rotating arm 41, first arc-shaped sliding portion 411, first inner tooth structure 412, first connecting hole 413, first inner tooth structure 414, first inner tooth structure 415, first inner tooth structure 416, first inner tooth structure 417, first inner tooth structure 418, first inner tooth structure 419, first inner tooth structure 420, first inner tooth structure 421, first inner tooth structure 422, first inner tooth structure 423, first inner tooth structure 424, first inner tooth structure 425, first inner tooth structure 426, first inner tooth structure 427, first inner tooth structure 428, first inner tooth structure 429, first inner tooth structure 430, first inner tooth structure 431, first inner tooth structure 432, first inner tooth structure 433, first inner tooth structure 434, first inner tooth structure 435, first inner tooth structure 436, first inner tooth structure 437, first inner tooth structure 438, first inner tooth structure 439, first inner tooth structure 440, first inner tooth structure 441, first inner tooth structure 442, first inner tooth structure 443, first inner tooth structure 444, first inner tooth structure 445, first inner tooth structure 446, first inner tooth structure 447, first inner tooth structure 448, first inner tooth structure 449, first inner tooth structure 44A, first inner tooth structure 44A, first inner tooth structure 44A, first inner A limiting portion 414, a third cam 415, a first protrusion 416, a right rotating arm 42, a second arc-shaped sliding portion 421, a second inner tooth structure 422, a second connecting hole 423, a second limiting portion 424, a fourth cam 425, a second protrusion 426, an outer gear 43, a first cam 44, a first slider 441, a second cam 45, a first elastic member 46, a first connecting shaft 47, a first connecting member 48, a left housing 5, a right housing 6, and a flexible screen 7. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are part of the embodiments of the present disclosure, rather than all of the embodiments, and are only used to explain the present disclosure, and are not used to limit the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present disclosure.

[0028] In the description of the present disclosure, it should be noted that the terms "center", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside", "two ends", "both sides", "bottom", "top" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the elements referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limitations on the present disclosure. In addition, the terms "first", "second", "superior", "inferior", "primary", "secondary" and the like are used for descriptive purposes only, and can simply be used to more clearly distinguish different components, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, or the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0030] See also Figures 1 to 9 As shown, a hinge for a mobile terminal with an inward folding flexible screen 7 according to the present disclosure is schematically shown, which is mainly used for various mobile terminals such as mobile phones and tablet computers with flexible screens 7. The hinge for the mobile terminal with an inward folding flexible screen 7 includes an intermediate bracket 1, a left support plate 2, a right support plate 3 and a synchronous reverse rotation mechanism 4, a left rotating arm 41 can be connected to the corresponding left side housing 5, and the left rotating arm 41 can be connected to the corresponding left side housing 5, for example, by fasteners such as screws, and the two halves of the corresponding flexible screen 7 are fixedly connected to the left side housing 5 and the right side housing 6 respectively by gluing or the like, and the synchronous reverse rotation mechanism 4 can drive the left support plate 2 and the right support plate 3 to rotate synchronously in the opposite direction, and the left support plate 2 and the right support plate 3 are used to support the corresponding flexible screen 7.

[0031] The synchronous reverse rotation mechanism 4 includes a left rotating arm 41, a right rotating arm 42 and two external gears 43. The left rotating arm 41 and the right rotating arm 42 can rotate synchronously in the opposite direction. The two external gears 43 are arranged on the intermediate bracket 1. One end of the left rotating arm 41 is provided with a first arc-shaped sliding portion 411. The other end of the left rotating arm 41 is hinged to the end of the left support plate 2 away from the intermediate bracket 1. The inner side of the first arc-shaped sliding portion 411 is provided with a first internal tooth structure 412. The first internal tooth structure 412 is meshed with one of the external gears 43. One end of the right rotating arm 42 is provided with a second arc-shaped sliding portion 421. The other end of 42 is hinged to the end of the right support plate 3 away from the middle bracket 1, and the inner side of the second arc-shaped sliding part 421 is provided with a second inner tooth structure 422, which meshes with another outer gear 43. The middle bracket 1 is provided with a first arc-shaped slide groove 101 and a second arc-shaped slide groove 102, and the first arc-shaped slide groove 101 cooperates with the first arc-shaped sliding part 411, and the first arc-shaped sliding part 411 can rotate along the first arc-shaped slide groove 101, and the second arc-shaped slide groove 102 cooperates with the second arc-shaped sliding part 421, and the second arc-shaped sliding part 421 can rotate along the second arc-shaped slide groove 102. The first inner tooth structure 412 is provided on the first arc-shaped sliding part 411, and the second inner tooth structure 422 is provided on the second arc-shaped sliding part 421, so that the rotating part and the gear are integrated, the structure is more compact and stable, the structure is simplified, and the volume is reduced.

[0032] During use, the first arc-shaped sliding portion 411 rotates along the first arc-shaped groove 101, and at the same time, the first internal tooth structure 412 on the first arc-shaped sliding portion 411 meshes and rotates with an external gear 43, and the second arc-shaped sliding portion 421 rotates along the second arc-shaped groove 102, and at the same time, the second internal tooth structure 422 on the second arc-shaped sliding portion 421 meshes and rotates with another external gear 43, so that the left rotating arm 41 and the right rotating arm 42 can rotate synchronously in opposite directions, thereby enabling the corresponding flexible screen 7 to be opened and unfolded and folded inward and closed. As the left rotating arm 41 and the right rotating arm 42 rotate inward and close, the left support plate 2 can rotate outward with the hinge of the left rotating arm 41 and the left support plate 2 as the center, and at the same time, the right support plate 3 can rotate outward with the hinge of the right rotating arm 42 and the right support plate 3 as the center, so that an inverted V-shaped avoidance interval can be formed between the left support plate 2 and the right support plate 3, which is convenient for the flexible screen 7 to curl freely at the bend to form a water drop shape, which can reduce the internal stress of the flexible screen 7 and avoid damage to the flexible screen 7. As the left rotating arm 41 and the right rotating arm 42 rotate outward and open and flatten, the left support plate 2 and the right support plate 3 can support the corresponding flexible screen 7 to ensure the flatness of the flexible screen 7 during opening and use. The stability and reliability are high, which facilitates the flexible screen 7 to be better applied to various mobile terminals such as mobile phones and tablets.

[0033] The two ends of the middle bracket 1 are respectively provided with synchronous reverse rotation mechanisms 4, and the two synchronous reverse rotation mechanisms 4 are respectively matched with the two ends of the left support plate 2 and the two ends of the right support plate 3, that is, the two synchronous reverse rotation mechanisms 4 work simultaneously and synchronously, and the force is more uniform, more stable and reliable, etc.

[0034] The rotation center of the left rotating arm 41 is the same as the rotation center of the right rotating arm 42, so that the left rotating arm 41 and the right rotating arm 42 can rotate in opposite directions more accurately and stably. As the left rotating arm 41 and the right rotating arm 42 rotate outward to open and flatten, the rotation center of the left rotating arm 41 and the rotation center of the right rotating arm 42 are located above the left support plate 2 and the right support plate 3, which can reduce the internal stress of the flexible screen 7 and reduce the damage to the flexible screen 7, etc., and is more stable and reliable. As the left rotating arm 41 and the right rotating arm 42 rotate inward to close, that is, after the flexible screen 7 is folded inward and closed, the bottom of the flexible screen 7 can also be located above the rotation center of the left rotating arm 41 and the right rotating arm 42, which is more stable and reliable.

[0035] The length of the left support plate 2 and the length of the right support plate 3 are basically consistent with the length of the flexible screen 7, which can support the unfolded flexible screen 7 more comprehensively and evenly, with higher stability and reliability. The left support plate 2 and the right support plate 3 fully support the middle part of the flexible screen 7 as much as possible.

[0036] As the left rotating arm 41 and the right rotating arm 42 rotate outward to open and flatten, the first arc-shaped sliding portion 411 close to the top of one end of the right support plate 3 can support the right support plate 3, and the second arc-shaped sliding portion 421 close to the top of one end of the left support plate 2 can support the left support plate 2, so that the left support plate 2 and the right support plate 3 can stably support the flexible screen 7, ensuring the flatness of the flexible screen 7 during use, and the structure is more compact and stable.

[0037] The left support plate 2 has the same structure as the right support plate 3, and the left rotating arm 41 has the same structure as the right rotating arm 42. A first avoidance hole 23 is provided on the left support plate 2, and a first protrusion 416 is provided on the upper part of one end of the first arc-shaped sliding portion 411 close to the right support plate 3. A second avoidance hole 33 is provided on the right support plate 3, and a second protrusion 426 is provided on the upper part of one end of the second arc-shaped sliding portion 421 close to the left support plate 2. The shapes and sizes of the first protrusion 416 and the second protrusion 426 are determined according to specific circumstances. As the left rotating arm 41 and the right rotating arm 42 rotate outward to open and flatten, the first arc-shaped sliding portion 411 is inserted into the second avoidance hole 33 near the top of one end of the right support plate 3, and the first protrusion 416 is supported against the bottom surface of the right support plate 3, and the second arc-shaped sliding portion 421 is inserted into the first avoidance hole 23 near the top of one end of the left support plate 2, and the second protrusion 426 is supported against the bottom surface of the left support plate 2. The structure is more stable and reliable, which facilitates the first internal tooth structure 412 and the second internal tooth structure 422 to better mesh with the two external gears 43 respectively.

[0038] A first rotating shaft 21 is provided on the left support plate 2, a first connecting hole 413 hinged to the first rotating shaft 21 is provided on the left rotating arm 41, a second rotating shaft 31 is provided on the right support plate 3, and a second connecting hole 423 hinged to the second rotating shaft 31 is provided on the right rotating arm 42. The structure is simple, stable, and easy to operate, and can ensure that the left support plate 2 and the right support rotate better.

[0039] The first rotating shaft 21 is provided with a first torsion spring 22 cooperating with the left rotating arm 41, the left rotating arm 41 is provided with a first limiting portion 414 cooperating with the left support plate 2, the second rotating shaft 31 is provided with a second torsion spring 32 cooperating with the right rotating arm 42, and the right rotating arm 42 is provided with a second limiting portion 424 cooperating with the right support plate 3. When the left rotating arm 41 and the right rotating arm 42 are rotated outward to open and flatten, the first arc-shaped sliding portion 411 is inserted into the second avoidance hole 33 near the top of one end of the right support plate 3, and the first protrusion 416 is supported against the bottom surface of the right support plate 3, and the second arc-shaped sliding portion 421 is inserted into the first avoidance hole 23 near the top of one end of the left support plate 2, and the second protrusion 426 is supported against the bottom surface of the left support plate 2, the twisted first torsion spring 22 can press the left support plate 2 against the second protrusion 426, and the twisted second torsion spring 32 can press the right support plate 3 against the first protrusion 416, so the structure is more stable and reliable. As the left rotating arm 41 and the right rotating arm 42 rotate inward and close, in the initial stage, the first torsion spring 22 keeps the left support plate 2 pressed against the second protrusion 426, and the second torsion spring 32 can press the right support plate 3 against the first protrusion 416. After the left rotating arm 41 and the right rotating arm 42 rotate synchronously in the opposite direction within a certain range, the left support plate 2 separates from the second protrusion 426, and the right support plate 3 separates from the first protrusion 416. When the left rotating arm 41 and the right rotating arm 42 are finally rotated inward and closed, the first torsion spring 22 can eventually make the left support plate 2 rest against the first limiting portion 414, and the second torsion spring 32 can eventually make the right support plate 3 rest against the second limiting portion 424, making the operation more convenient, stable, and reliable.

[0040] The synchronous reverse rotation mechanism 4 also includes a first cam 44, a second cam 45 and a first elastic member 46 matched with the first cam 44 and the second cam 45. The first cam 44 matches with the first arc-shaped sliding portion 411, and the second cam 45 matches with the second arc-shaped sliding portion 421. The first elastic member 46 can make the first cam 44 elastically match with the third cam 415 on one side of the first arc-shaped sliding portion 411, and the first elastic member 46 can make the second cam 45 elastically match with the fourth cam 425 on one side of the second arc-shaped sliding portion 421. The first arc-shaped sliding portion 411 is axially fixed, and the second arc-shaped sliding portion 421 is axially fixed, that is, the first arc-shaped sliding portion 411 can only rotate along the first arc-shaped sliding groove 101, and the second arc-shaped sliding portion 421 can only rotate along the second arc-shaped sliding groove 102. The first cam 44 and the second cam 45 can share a group of first elastic members 46, or two groups of first elastic members 46 correspond to the first cam 44 and the second cam 45 one-to-one, and each group of first elastic members 46 can be one, two or more. During the synchronous reverse rotation of the left rotating arm 41 and the right rotating arm 42, the first elastic member 46 makes the first cam 44 elastically cooperate with the third cam 415 on one side of the first arc-shaped sliding part 411, and the first elastic member 46 makes the second cam 45 elastically cooperate with the fourth cam 425 on one side of the second arc-shaped sliding part 421, so that torque can be provided for the rotation of the left rotating arm 41 and the right rotating arm 42, that is, suitable friction damping force is provided for the rotation of the left rotating arm 41 and the right rotating arm 42, so as to ensure the stability and reliability of the rotation, and the operation feeling and comfort are better. For example, the friction damping force in the open flat state is the largest, and has a certain self-locking ability. It needs to apply a certain external force to close, and the stability and reliability are higher. In the inward folding closed state, self-locking is achieved by cooperating with other auxiliary mechanisms, such as respectively setting corresponding magnets on the left housing 5 and the right housing 6. In addition, the friction damping force in the open flat state and the friction damping force in the inward folding closed state can also be the largest, that is, the open flat state and the inward folding closed state both have a certain self-locking ability.

[0041] Reference Figure 6 , Figure 8As shown, the external gear 43 is connected to the first connecting shaft 47, and the external gear 43 corresponds to the first connecting shaft 47 one by one. Usually, two first connecting shafts 47 are arranged side by side, and each first connecting shaft 47 is provided with an external gear 43. The two ends of the two first connecting shafts 47 are respectively connected by a first connecting member 48. The first cam 44 is fixed to the two first connecting shafts 47 in the circumferential direction and can slide relative to each other in the axial direction. The second cam 45 is fixed to the two first connecting shafts 47 in the circumferential direction and can slide relative to each other in the axial direction. The first cam 44 is provided with through holes respectively connected to the two first connecting shafts 47, and the second cam 45 is provided with The through holes are respectively connected to the two first connecting shafts 47, the first arc sliding portion 411 and the second arc sliding portion 421 are located between the first cam 44 and the second cam 45, the first elastic member 46 is a spring respectively sleeved on the first connecting shafts 47, each first connecting shaft 47 is respectively sleeved with a first elastic member 46, one end of each first elastic member 46 presses against the first cam 44, the other end of each first elastic member 46 presses against the first connecting member 48 at one end of the first connecting shaft 47, and the end of the second cam 45 away from the fourth cam 425 presses against the first connecting member 48 at the other end of the first connecting shaft 47. For example, when the left rotating arm 41 and the right rotating arm 42 rotate inward and close synchronously in opposite directions, the rotation of the first arc-shaped sliding portion 411 can push the first cam 44 to slide axially along the first connecting shaft 47, and the first cam 44 compresses the first elastic member 46. At the same time, the rotation of the second arc-shaped sliding portion 421 can push the second cam 45 and the two first connecting shafts 47 to move axially together, and also compress the first elastic member 46, thereby providing torque for the rotation of the left rotating arm 41 and the right rotating arm 42, that is, providing suitable friction damping force for the rotation of the left rotating arm 41 and the right rotating arm 42.

[0042] The first cam 44 and the second cam 45 have the same structure. First sliders 441 are respectively provided on both sides of the first cam 44. Two first slide grooves 103 respectively matched with the two first sliders 441 are provided on the intermediate bracket 1. The two first slide grooves 103 are arranged along the axial direction of the first connecting shaft 47. Similarly, second sliders are respectively provided on both sides of the second cam 45. Two second slide grooves respectively matched with the two second sliders are provided on the intermediate bracket 1. The two second slide grooves are arranged along the axial direction of the first connecting shaft 47. The first cam 44 and the second cam 45 move axially along the first connecting shaft 47. At the same time, the first slider 441 slides along the first slide groove 103, and the second slider slides along the second slide groove, so the movement is more stable and reliable.

[0043] A first fixing block 11 is arranged on the intermediate bracket 1 , and a first arc-shaped slide groove 101 , a second arc-shaped slide groove 102 and a first slide groove 103 are arranged on the first fixing block 11 , so that the operation is more convenient, stable and reliable.

[0044] Compared with the prior art, the advantages of the present invention are as follows: the first arc-shaped sliding portion 411 rotates along the first arc-shaped slot 101, and at the same time, the first inner tooth structure 412 on the first arc-shaped sliding portion 411 meshes and rotates with an outer gear 43, and the second arc-shaped sliding portion 421 rotates along the second arc-shaped slot 102, and at the same time, the second inner tooth structure 422 on the second arc-shaped sliding portion 421 meshes and rotates with another outer gear 43, so that the left rotating arm 41 and the right rotating arm 42 can rotate synchronously in opposite directions, thereby enabling the corresponding flexible screen 7 to be opened, flattened, and folded inwardly and closed; a first inner tooth structure 412 is provided on the first arc-shaped sliding portion 411, and a second inner tooth structure 422 is provided on the second arc-shaped sliding portion 421, so that the rotating member and the gear are integrated The structure is more compact and stable, the structure is simplified, and the volume is reduced; the rotation center of the left rotating arm 41 is the same as the rotation center of the right rotating arm 42. As the left rotating arm 41 and the right rotating arm 42 rotate inward and close, the left support plate 2 can rotate outward with the hinge of the left rotating arm 41 and the left support plate 2 as the center, and the right support plate 3 can rotate outward with the hinge of the right rotating arm 42 and the right support plate 3 as the center, and the first torsion spring 22 can eventually make the left support plate 2 abut against the first limiting portion 414, and the second torsion spring can eventually make the right support plate 3 abut against the second limiting portion, so that an inverted V-shaped avoidance interval can be formed between the left support plate 2 and the right support plate 3, which is convenient for the flexible screen 7 to curl freely at the bend to form a water drop shape. As the left rotating arm 41 and the right rotating arm 42 rotate outward to open and level, the rotation centers of the left rotating arm 41 and the right rotating arm 42 are located above the left support plate 2 and the right support plate 3, the first arc-shaped sliding portion 411 is inserted into the second avoidance hole 33 near the top of one end of the right support plate 3, and the first protrusion 416 is supported against the bottom surface of the right support plate 3, and the second arc-shaped sliding portion 421 is inserted into the first avoidance hole 23 near the top of one end of the left support plate 2, and the second protrusion 426 is supported against the bottom surface of the left support plate 2, the twisted first torsion spring 22 can press the left support plate 2 against the second protrusion 426, and the twisted second torsion spring 32 can press the right support plate 3 against the first protrusion 416 , which can reduce the internal stress of the flexible screen 7, avoid damage to the flexible screen 7, and ensure the flatness of the flexible screen 7 during use; the first cam 44, the second cam 45 and the first elastic member 46 cooperate to provide torque for the rotation of the left rotating arm 41 and the right rotating arm 42, that is, to provide appropriate friction damping force for the rotation of the left rotating arm 41 and the right rotating arm 42, and the operating feel and comfort are better. For example, the friction damping force is the largest in the opened and flattened state, and it has a certain self-locking ability, and a certain external force needs to be applied to close it; it is easy to operate, has high stability and reliability, and improves the service life of the product, so that the flexible screen 7 can be better applied to various mobile terminals such as mobile phones and tablets, thereby expanding the application and development of the product.

[0045] The above are only some embodiments of the present disclosure, which are only used to illustrate the technical solution of the present disclosure, rather than to limit it. It should be understood that, for those skilled in the art, without departing from the creative concept of the present disclosure, it is possible to make improvements or substitutions according to the above description, and all these improvements and substitutions should fall within the scope of protection of the claims attached to the present disclosure. In this case, all details can be replaced by equivalent elements, and the materials, shapes and sizes can also be arbitrary.

Claims

1. A hinge for an inward-folding flexible screen mobile terminal, characterized in that: The invention comprises an intermediate bracket (1), a left support plate (2), a right support plate (3) and a synchronous reverse rotation mechanism (4), wherein the synchronous reverse rotation mechanism (4) comprises a left rotating arm (41), a right rotating arm (42) and two external gears (43) arranged on the intermediate bracket (1), one end of the left rotating arm (41) is provided with a first arc-shaped sliding portion (411), the other end of the left rotating arm (41) is hinged to an end of the left support plate (2) away from the intermediate bracket (1), the inner side of the first arc-shaped sliding portion (411) is provided with a first internal tooth structure (412) matched with one of the external gears (43), one end of the right rotating arm (42) is provided with a second arc-shaped sliding portion (421), and the right rotating arm (42) is hinged to the inner side of the first arc-shaped sliding portion (411). The other end of the arm (42) is hinged to an end of the right support plate (3) away from the intermediate bracket (1); a second inner tooth structure (422) matching with another outer gear (43) is provided on the inner side of the second arc-shaped sliding portion (421); a first arc-shaped sliding groove (101) matching with the first arc-shaped sliding portion (411) and a second arc-shaped sliding groove (102) matching with the second arc-shaped sliding portion (421) are provided on the intermediate bracket (1); the left rotating arm (41) and the right rotating arm (42) can rotate synchronously in opposite directions; as the left rotating arm (41) and the right rotating arm (42) rotate inward and close, the left support plate (2) and the right support plate (3) can swing outward respectively; The rotation center of the left rotating arm (41) is the same as the rotation center of the right rotating arm (42); as the left rotating arm (41) and the right rotating arm (42) rotate outward to open and level, the top of one end of the first arc-shaped sliding portion (411) close to the right supporting plate (3) can support the right supporting plate (3), and the top of one end of the second arc-shaped sliding portion (421) close to the left supporting plate (2) can support the left supporting plate (2); As the left rotating arm (41) and the right rotating arm (42) rotate outward to open and level, the rotation centers of the left rotating arm (41) and the right rotating arm (42) are located above the left supporting plate (2) and the right supporting plate (3); The left support plate (2) and the right support plate (3) have the same structure, the left rotating arm (41) and the right rotating arm (42) have the same structure, the left support plate (2) is provided with a first avoidance hole (23), the upper portion of one end of the first arc-shaped sliding portion (411) close to the right support plate (3) is provided with a first protrusion (416), the right support plate (3) is provided with a second avoidance hole (33), the upper portion of one end of the second arc-shaped sliding portion (421) close to the left support plate (2) is provided with a second protrusion (426), and as the The left rotating arm (41) and the right rotating arm (42) are rotated outward to open and level, the first arc-shaped sliding portion (411) is inserted into the second avoidance hole (33) near the top of one end of the right support plate (3), and the first protrusion (416) is pressed against the bottom surface of the right support plate (3) for support, and the second arc-shaped sliding portion (421) is inserted into the first avoidance hole (23) near the top of one end of the left support plate (2), and the second protrusion (426) is pressed against the bottom surface of the left support plate (2) for support.

2. The hinge for an inward-folding flexible screen mobile terminal according to claim 1, characterized in that: The left support plate (2) is provided with a first rotating shaft (21), the left rotating arm (41) is provided with a first connecting hole (413) hingedly connected to the first rotating shaft (21), the right support plate (3) is provided with a second rotating shaft (31), and the right rotating arm (42) is provided with a second connecting hole (423) hingedly connected to the second rotating shaft (31).

3. The hinge for an inward-folding flexible screen mobile terminal according to claim 2, characterized in that: The first rotating shaft (21) is provided with a first torsion spring (22) cooperating with the left rotating arm (41), the left rotating arm (41) is provided with a first limiting portion (414) cooperating with the left supporting plate (2), the second rotating shaft (31) is provided with a second torsion spring (32) cooperating with the right rotating arm (42), the right rotating arm (42) is provided with a second limiting portion (424) cooperating with the right supporting plate (3), and as the left rotating arm (41) and the right rotating arm (42) rotate inwardly and close, the first torsion spring (22) is provided with a first limiting portion (414) cooperating with the left supporting plate (2), and the second rotating shaft (31) is provided with a second torsion spring (32) cooperating with the right rotating arm (42). The torsion spring (22) enables the left support plate (2) to abut against the first limiting portion (414), and the second torsion spring (32) enables the right support plate (3) to abut against the second limiting portion (424); as the left rotating arm (41) and the right rotating arm (42) rotate outward to open and flatten, the twisted first torsion spring (22) enables the left support plate (2) to press against the second protrusion (426), and the twisted second torsion spring (32) enables the right support plate (3) to press against the first protrusion (416).

4. The hinge for an inward-folding flexible screen mobile terminal according to any one of claims 1 to 3, characterized in that: The synchronous reverse rotation mechanism (4) further comprises a first cam (44) matched with the first arc-shaped sliding portion (411), a second cam (45) matched with the second arc-shaped sliding portion (421), and a first elastic member (46) matched with the first cam (44) and the second cam (45); the first arc-shaped sliding portion (411) is axially fixed, the second arc-shaped sliding portion (421) is axially fixed, the first elastic member (46) can make the first cam (44) elastically match with a third cam (415) on one side of the first arc-shaped sliding portion (411), and the first elastic member (46) can make the second cam (45) elastically match with a fourth cam (425) on one side of the second arc-shaped sliding portion (421).

5. The hinge for an inward-folding flexible screen mobile terminal according to claim 4, characterized in that: The external gear (43) is connected to the first connecting shaft (47), and the external gear (43) corresponds to the first connecting shaft (47) one by one. The two ends of the two first connecting shafts (47) are respectively connected by a first connecting member (48). The first cam (44) is fixed to the two first connecting shafts (47) in a circumferential direction and can slide relative to each other in an axial direction. The second cam (45) is fixed to the two first connecting shafts (47) in a circumferential direction and can slide relative to each other in an axial direction. The first arc-shaped sliding portion (411) and the second arc-shaped sliding portion (421) are located between the first cam (44) and the second cam (45). The first elastic member (46) is a spring respectively sleeved on the first connecting shaft (47). One end of each of the first elastic members (46) is pressed against the first cam (44) and the other end thereof is pressed against the first connecting member (48).

6. The hinge for an inward-folding flexible screen mobile terminal according to claim 5, characterized in that: The first cam (44) and the second cam (45) have the same structure. First sliders (441) are respectively provided on both sides of the first cam (44). The intermediate bracket (1) is provided with two first slide grooves (103) respectively matched with the two first slide grooves (441). The two first slide grooves (103) are arranged along the axial direction of the first connecting shaft (47).

7. The hinge for an inward-folding flexible screen mobile terminal according to claim 6, characterized in that: A first fixing block (11) is provided on the intermediate bracket (1), and the first arc-shaped sliding groove (101), the second arc-shaped sliding groove (102) and the first sliding groove (103) are provided on the first fixing block (11).

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