A hinge for an inward-folding flexible screen mobile terminal

Abstract

The present disclosure provides a hinge for an inward-folding flexible screen mobile terminal, comprising an intermediate bracket and a left rotating arm and a right rotating arm rotatably connected to the intermediate bracket. The intermediate bracket can make the left rotating arm and the right rotating arm rotate in the opposite direction synchronously through a synchronous reverse rotation mechanism. The synchronous reverse rotation mechanism includes two first bevel gears capable of synchronous reverse rotation. The two first bevel gears are connected by a gear assembly. The left rotating arm is provided with a first bevel gear structure meshed with one of the first bevel gears, and the right rotating arm is provided with a second bevel gear structure meshed with the other first bevel gear. The present disclosure can realize the unfolding and folding of the corresponding flexible screen, and can convert the horizontal rotation into the vertical rotation. The structure is compact and stable, saves space, is simple and convenient to operate, and has high stability and reliability, so that the flexible screen can be better applied to various mobile terminals such as mobile phones and tablets.

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 and replaced 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 smartphones 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 obtain a double display, which meets the demand for large-screen displays 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, operational feel, and comfort 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 this 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 this disclosure is as follows:

[0004] A hinge for an inward-folding flexible screen mobile terminal comprises an intermediate bracket and a left rotating arm and a right rotating arm rotatably connected to the intermediate bracket. The intermediate bracket can make the left rotating arm and the right rotating arm rotate synchronously in the opposite direction through a synchronous reverse rotation mechanism. The synchronous reverse rotation mechanism comprises two first bevel gears that can rotate synchronously in the opposite direction. The two first bevel gears are connected by a gear assembly. The left rotating arm is provided with a first bevel gear structure meshing with one of the first bevel gears, and the right rotating arm is provided with a second bevel gear structure meshing with the other first bevel gear. The rotation axis of the left rotating arm is parallel to the rotation axis of the right rotating arm, the rotation axes of the two first bevel gears are parallel, and the rotation axis of the left rotating arm is perpendicular to the rotation axis of the first bevel gears.

[0005] In some embodiments, the gear assembly includes a first spur gear and two second spur gears, the first spur gear is respectively engaged with the two second spur gears, the two second spur gears can rotate synchronously in opposite directions, the second spur gears correspond one-to-one to the first bevel gears, and the second spur gears are coaxially connected to the corresponding first bevel gears.

[0006] In some embodiments, the synchronous reverse rotation mechanism also includes a first cam that cooperates with the first spur gear and a first elastic element that cooperates with the first cam. A cam structure that cooperates with the first cam is provided at one end of the first spur gear. The first elastic element enables the first cam to elastically cooperate with the cam structure to provide torque for the synchronous reverse rotation of the two second spur gears.

[0007] In some embodiments, a first fixed shaft rotatably connected to the first spur gear is provided on the intermediate bracket, the first cam is located above the first spur gear and is sleeved on the first fixed shaft, the cam structure is located on the top of the first spur gear, the first elastic element is a leaf spring and is located above the first cam, the two ends of the first elastic element are respectively connected to the intermediate bracket, the middle part of the first elastic element is elastically pressed against the top of the first cam, and the middle part of the first elastic element is provided with a first through hole that cooperates with the first fixed shaft.

[0008] In some embodiments, the second spur gear and its corresponding first bevel gear are integrally formed, and a first fixing block for defining the gear assembly and the two first bevel gears is provided on the intermediate bracket.

[0009] In some embodiments, a first slot is provided on the intermediate bracket, and the synchronous reverse rotation mechanism, the first fixed shaft and the first fixed block are located in the first slot.

[0010] In some embodiments, a first arc-shaped sliding portion is provided at one end of the left rotating arm, and the first bevel gear structure is located on one side of the first arc-shaped sliding portion; a second arc-shaped sliding portion is provided at one end of the right rotating arm, and the second bevel gear structure is located on one side of the second arc-shaped sliding portion; and a first arc-shaped slideway is provided on the intermediate bracket, which cooperates with the first arc-shaped sliding portion and the second arc-shaped sliding portion respectively.

[0011] In some embodiments, a second fixed block cooperating with the first arc-shaped sliding portion and a third fixed block cooperating with the second arc-shaped sliding portion are provided on the intermediate bracket, a first protruding edge is provided on the side of the first arc-shaped sliding portion away from the first bevel gear structure, a first arc-shaped sliding groove cooperating with the first protruding edge is provided on the second fixed block, a second protruding edge is provided on the side of the second arc-shaped sliding portion away from the second bevel gear structure, and a second arc-shaped sliding groove cooperating with the second protruding edge is provided on the third fixed block.

[0012] In some embodiments, a left support plate and a right support plate are further included for supporting the corresponding flexible screen. The left support plate cooperates with the left rotating arm, and the right support plate cooperates with the right rotating arm. The end of the left rotating arm away from the first arc-shaped sliding portion is hinged to the end of the left support plate away from the middle bracket, and the end of the right rotating arm away from the second arc-shaped sliding portion is hinged to the end of the right support plate away from the middle bracket. As the flexible screen folds inward and closes, the end of the left support plate close to the middle bracket and the end of the right support plate close to the middle bracket can swing outward respectively to avoid the bending part of the flexible screen. As the flexible screen is unfolded and flattened, the top of the middle bracket can support the left support plate and the right support plate respectively.

[0013] In some embodiments, the left support plate is provided with a first avoidance groove cooperating with the left rotating arm and a second avoidance groove cooperating with the right rotating arm, and the right support plate is provided with a third avoidance groove cooperating with the right rotating arm and a fourth avoidance groove cooperating with the left rotating arm.

[0014] The beneficial effects of the present disclosure are: the left rotating arm and the right rotating arm rotate in opposite directions relative to the middle bracket respectively, and at the same time, the first bevel gear structure on the left rotating arm and the second bevel gear structure on the right rotating arm respectively cooperate with the two first bevel gears of the synchronous reverse rotation mechanism, and the gear assembly ensures that the two first bevel gears rotate synchronously in opposite directions, so that the left rotating arm and the right rotating arm rotate synchronously in opposite directions, thereby realizing the opening, flattening and inward folding and closing of the corresponding flexible screen, and the first bevel gear structure and the second bevel gear structure are respectively arranged on the left rotating arm and the right rotating arm, the rotation axis of the left rotating arm is parallel to the rotation axis of the right rotating arm, the rotation axes of the two first bevel gears are parallel, the rotation axes of the left rotating arm and the rotation axes of the right rotating arm are respectively perpendicular to the rotation axes of the two first bevel gears, and the horizontal rotation can be converted into vertical rotation. The structure is compact and stable, the structure is simplified, space is saved, the volume is reduced, the operation is simple and convenient, the stability and reliability are high, the service life of the product is improved, etc., which facilitates the flexible screen to be better applied to various mobile terminals such as mobile phones and tablets, enhances the competitiveness of the product, and expands the application and development of the product.

[0015] In addition, in the technical solutions disclosed herein, anything not specifically stated can be implemented by 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 following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. 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 an exploded view of a hinge of an inward-folding flexible screen mobile terminal according to an embodiment of the present disclosure.

[0018] Figure 2 This is a structural schematic diagram of the inward-folded closed state of the hinge of an inward-folding flexible screen mobile terminal according to an embodiment of the present invention.

[0019] Figure 3 This is a structural schematic diagram of the inward-folded closed state of the hinge of an inward-folding flexible screen mobile terminal according to an embodiment of the present invention.

[0020] Figure 4 This is a structural schematic diagram of an inward-folding flexible screen mobile terminal in an embodiment of the present invention, wherein the hinge is opened and flattened.

[0021] Figure 5 This is a structural schematic diagram of an inward-folding flexible screen mobile terminal in an embodiment of the present invention, wherein the hinge is opened and flattened.

[0022] Figure 6 An embodiment of the present disclosure Figure 5 A partial enlarged view of point A in the middle.

[0023] Figure 7 This is a schematic diagram of the partial structure of a hinge of an inward-folding flexible screen mobile terminal according to an embodiment of the present invention.

[0024] Figure 8 This is a schematic diagram of the partial structure of a hinge of an inward-folding flexible screen mobile terminal according to an embodiment of the present invention.

[0025] Figure 9 This is a schematic diagram of the partial structure of a hinge of an inward-folding flexible screen mobile terminal according to an embodiment of the present invention.

[0026] Figure 10 Schematic diagram of the structure of the first bevel gear and the second spur gear according to an embodiment of the present invention.

[0027] Figure 11 This is a schematic structural diagram of a first spur gear according to an embodiment of the present disclosure.

[0028] Figure 12 This is a schematic structural diagram of a first elastic element according to an embodiment of the present disclosure.

[0029] 1 , a first bevel gear 41 , a second bevel gear 42 , a first spur gear 42 , a first cam structure 421 , a second spur gear 422 , a first cam 43 , a first elastic element 44 , a first through hole 441 , a left support plate 5 , a first avoidance groove 51 , a second avoidance groove 52 , a first connecting shaft 53 , a first torsion spring 54 , a right support plate 6 , a third avoidance groove 61 , a fourth avoidance groove 62 , a second connecting shaft 63 , a second torsion spring 64 . DETAILED DESCRIPTION

[0030] 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 with reference to 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 intended to limit the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present disclosure.

[0031] 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", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship 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 limiting the present disclosure. In addition, the terms "first", "second", "superior", "inferior", "primary", "secondary", etc. are used for descriptive purposes only and can be simply used to more clearly distinguish different components, but cannot be understood as indicating or implying relative importance.

[0032] In the description of this disclosure, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, integral connections, mechanical connections, electrical connections, direct connections, indirect connections via an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on the specific circumstances.

[0033] See also Figures 1 to 12 The figure shows a schematic diagram of a hinge for an inward-folding flexible screen mobile terminal according to the present disclosure, which is mainly used in various mobile terminals with flexible screens, such as mobile phones and tablet computers. The hinge of the inward-folding flexible screen mobile terminal includes an intermediate bracket 1, a left rotating arm 2, a right rotating arm 3, and a synchronous reverse rotation mechanism 4. The left rotating arm 2 and the right rotating arm 3 are respectively rotatably connected to the intermediate bracket 1. The intermediate bracket 1 can cause the left rotating arm 2 and the right rotating arm 3 to rotate synchronously in the opposite direction through the synchronous reverse rotation mechanism 4.

[0034] The synchronous reverse rotation mechanism 4 includes two first bevel gears 41, and the two first bevel gears 41 can rotate synchronously in the opposite directions. The two first bevel gears 41 are connected by a gear assembly 42. The left rotating arm 2 and the right rotating arm 3 correspond to a first bevel gear 41 respectively. The left rotating arm 2 is provided with a first bevel gear structure 21 meshing with one of the first bevel gears 41, and the right rotating arm 3 is provided with a second bevel gear structure 31 meshing with the other first bevel gear 41. The first bevel gear structure 21 is integrally formed on the left rotating arm 2, and the second bevel gear structure 31 is integrally formed on the right rotating arm 3. The rotation axis of the left rotating arm 2 is parallel to the rotation axis of the right rotating arm 3, and the rotation axes of the two first bevel gears 41 are parallel. The rotation axis of the left rotating arm 2 is perpendicular to the rotation axis of the first bevel gear 41, and the rotation axis of the right rotating arm 3 is also perpendicular to the rotation axis of the first bevel gear 41, which can convert horizontal rotation into vertical rotation. The structure is compact and stable, simplifies the structure, saves space, etc. The rotation axis of the left rotating arm 2 and the rotation axis of the right rotating arm 3 may or may not coincide with each other.

[0035] During use, the left rotating arm 2 is connected to the corresponding left casing, the right rotating arm 3 is connected to the corresponding right casing, the two parts of the flexible screen are connected to the left casing and the right casing respectively, the left rotating arm 2 and the right rotating arm 3 rotate in opposite directions relative to the middle bracket 1 respectively, and at the same time the first bevel gear structure 21 on the left rotating arm 2 and the second bevel gear structure 31 on the right rotating arm 3 respectively cooperate with the two first bevel gears 41 of the synchronous reverse rotation mechanism 4, the gear assembly 42 ensures that the two first bevel gears 41 rotate synchronously in opposite directions, and the two first bevel gears 41 rotate synchronously in opposite directions respectively in the horizontal direction, so that the left rotating arm 2 and the right rotating arm 3 rotate synchronously in opposite directions respectively in the vertical direction, that is, the left casing and the right casing rotate synchronously in opposite directions, so that the corresponding flexible screen can be opened, unfolded and folded inward and closed.

[0036] The gear assembly 42 includes a first spur gear 421 and two second spur gears 422. The first spur gear 421 is respectively meshed with the two second spur gears 422. The two second spur gears 422 can rotate synchronously in opposite directions. The second spur gears 422 correspond to the first bevel gear 41 one by one. The second spur gears 422 are coaxially connected to the corresponding first bevel gear 41. The horizontal rotation of the first spur gear 421 drives the two second spur gears 422 to rotate synchronously in opposite directions horizontally. The two first bevel gears 41 rotate coaxially with the corresponding second spur gears 422. The synchronous horizontal reverse rotation of the two first bevel gears 41 drives the left rotating arm 2 and the right rotating arm 3 to rotate synchronously in opposite directions in the vertical direction, respectively, converting the horizontal rotation into the vertical rotation. The structure is compact and stable, the structure is simplified, and space is saved.

[0037] The synchronous reverse rotation mechanism 4 also includes a first cam 43 and a first elastic element 44. The first cam 43 cooperates with the first spur gear 421. The first elastic element 44 cooperates with the first cam 43. One end of the first spur gear 421 is provided with a cam structure 4211 that cooperates with the first cam 43. The first elastic element 44 can make the first cam 43 and the cam structure 4211 elastically cooperate, that is, the first cam 43 and the cam structure 4211 are elastically pressed together, thereby providing torque or friction damping force for the synchronous reverse rotation of the two second spur gears 422, that is, realizing the opening and closing feel of various mobile terminals such as mobile phones and tablets with flexible screens. Generally, the torque in the unfolded state and the torque in the folded closed state are both the largest, that is, the unfolded state and the folded closed state both have a certain self-locking ability, and are more stable and reliable.

[0038] The intermediate bracket 1 is provided with a first fixed shaft 11 rotatably connected to the first spur gear 421. The first cam 43 is located above the first spur gear 421 and is sleeved on the first fixed shaft 11. The first cam 43 is fixed to the first fixed shaft 11 in the circumferential direction. The first cam 43 can slide along the axial direction of the first fixed shaft 11. The cam structure 4211 is located at the top of the first spur gear 421. The first elastic element 44 is a leaf spring and is located above the first cam 43. The two ends of the first elastic element 44 are respectively connected to the intermediate bracket 1. The middle part of the first elastic element 44 is elastically pressed against the top of the first cam 43. The middle part of the first elastic element 44 is provided with a first through hole 441 that cooperates with the first fixed shaft 11. When the cam structure 4211 rotates synchronously with the first spur gear 421, the cam structure 4211 pushes the first cam 43 to slide along the axial direction of the first fixed shaft 11, so that the first elastic member bends and stretches, thereby providing torque. The two ends of the first elastic element 44 can be connected to the intermediate bracket 1 via adjusting screws, respectively, to facilitate adjustment of the elastic pressure exerted by the first cam 43 on the cam structure 4211, that is, to adjust the torque, making operation more convenient. Furthermore, the cam structure 4211 can also be a cam coaxially connected to the first spur gear 421, and the first elastic element 44 can also be a spring sleeved on the first fixed shaft 11.

[0039] The second spur gear 422 and its corresponding first bevel gear 41 are formed as one piece, and the intermediate bracket 1 is provided with a second fixed shaft 16 for placing the second spur gear 422 and the first bevel gear 41, and the intermediate bracket 1 is provided with a first fixed block 12 for limiting the gear assembly 42 and the two first bevel gears 41. The first fixed block 12 can position the gear assembly 42 and the two first bevel gears 41 on the intermediate bracket 1, and the structure is more stable and reliable, and the operation is more convenient.

[0040] A first arc-shaped sliding portion 22 is provided at one end of the left rotating arm 2, and the first bevel gear structure 21 is located on one side of the first arc-shaped sliding portion 22. A second arc-shaped sliding portion 32 is provided at one end of the right rotating arm 3, and the second bevel gear structure 31 is located on one side of the second arc-shaped sliding portion 32. A first arc-shaped slide 101 is provided on the intermediate bracket 1, which cooperates with the first arc-shaped sliding portion 22 and the second arc-shaped sliding portion 32 respectively. The intermediate bracket 1 can make the left rotating arm 2 and the right rotating arm 3 rotate synchronously in the opposite direction through the synchronous reverse rotation mechanism 4. At the same time, the first arc-shaped sliding portion 22 and the second arc-shaped sliding portion 32 rotate along the first arc-shaped slide 101 respectively, which is more stable and reliable.

[0041] The middle bracket 1 is provided with a second fixed block 14 that cooperates with the first arc-shaped sliding portion 22 and a third fixed block 15 that cooperates with the second arc-shaped sliding portion 32. The first arc-shaped sliding portion 22 is provided with a first protruding edge 23 on the side away from the first bevel gear structure 21, and the second fixed block 14 is provided with a first arc-shaped sliding groove that cooperates with the first protruding edge 23. The second arc-shaped sliding portion 32 is provided with a second protruding edge 33 on the side away from the second bevel gear structure 31. The third fixed block 15 is provided with a second arc-shaped sliding groove that cooperates with the second protruding edge 33. The middle bracket 1 can make the left rotating arm 2 and the right rotating arm 3 rotate synchronously in the opposite direction through the synchronous reverse rotation mechanism 4. At the same time, the first arc-shaped sliding portion 22 and the second arc-shaped sliding portion 32 rotate along the first arc-shaped slide 101 respectively, the first protruding edge 23 rotates along the first arc-shaped sliding groove, and the second protruding edge 33 rotates along the second arc-shaped sliding groove, which is more stable and reliable, and also facilitates the first arc-shaped sliding portion 22 and the second arc-shaped sliding portion 32 to be limited on the middle bracket 1.

[0042] A first groove body 13 is provided on the intermediate bracket 1. For example, the intermediate bracket 1 can be a shell, and the first groove body 13 is formed inside the shell. The synchronous reverse rotation mechanism 4, the second fixed block 14, the third fixed block 15, the first fixed shaft 11, the second fixed shaft 16, the first fixed block 12 and the first arc-shaped slide 101 are all located in the first groove body 13, and the structure is more compact and stable.

[0043] The hinge of the inward-folding flexible screen mobile terminal also includes a left support plate 5 and a right support plate 6, which are used to support the corresponding flexible screen. The left support plate 5 cooperates with the left rotating arm 2, and the right support plate 6 cooperates with the right rotating arm 3. The end of the left rotating arm 2 away from the first arc-shaped sliding part 22 is hinged to the end of the left support plate 5 away from the middle bracket 1, and the end of the right rotating arm 3 away from the second arc-shaped sliding part 32 is hinged to the end of the right support plate 6 away from the middle bracket 1. As the left rotating arm 2 and the right rotating arm 3 rotate inward and close, the left support plate 5 can rotate outward with the hinge of the left rotating arm 2 and the left support plate 5 as the center, and at the same time, the right support plate 6 can rotate outward with the hinge of the right rotating arm 3 and the right support plate 6 as the center, so that an inverted V-shaped avoidance interval can be formed between the left support plate 5 and the right support plate 6, which is convenient for the flexible screen to curl freely at the bend to form a water drop shape, which can reduce the stress in the flexible screen and avoid damage to the flexible screen. As the left rotating arm 2 and the right rotating arm 3 rotate outward to open and flatten, the top of the middle bracket 1 can support the left support plate 5 and the right support plate 6 respectively, ensuring the flatness of the flexible screen during opening and use, with high stability and reliability, so that the flexible screen can be better applied to various mobile terminals such as mobile phones and tablets.

[0044] The left support plate 52 and the right support plate 63 have basically the same structure. The first arc-shaped sliding portion 22 of the left rotating arm 2 and the second arc-shaped sliding portion 32 of the right rotating arm 3 are usually partially staggered. The left support plate 5 is provided with a first avoidance groove 51 that cooperates with the left rotating arm 2 and a second avoidance groove 52 that cooperates with the right rotating arm 3. The right support plate 6 is provided with a third avoidance groove 61 that cooperates with the right rotating arm 3 and a fourth avoidance groove 62 that cooperates with the left rotating arm 2. The structure is more compact and stable.

[0045] The left support plate 52 and the right support plate 63 have basically the same structure. A first connecting shaft 53 is provided on the left support plate 5, and a first connecting portion 24 hinged to the first connecting shaft 53 is provided on the left rotating arm 2. A connecting hole hinged to the first connecting shaft 53 is provided on the first connecting portion 24. A second connecting shaft 63 is provided on the right support plate 6, and a second connecting portion hinged to the second connecting shaft 63 is provided on the right rotating arm 3. A connecting hole hinged to the second connecting shaft 63 is provided on the second connecting portion. The structure is simple, stable, and easy to operate, which can ensure that the left support plate 5 and the right support rotate better.

[0046] A first torsion spring that cooperates with the left pivot arm 2 is provided on the first connecting shaft 53, and a second torsion spring 64 that cooperates with the right pivot arm 3 is provided on the second connecting shaft 63. When the left pivot arm 2 and the right pivot arm 3 rotate outward to open and flatten, the first torsion spring 64 and the second torsion spring 64 are twisted. The twisted first torsion spring 64 can press the left support plate 5 and the right support plate 6 against the top of the intermediate bracket 1, making the structure more stable and reliable, and preventing shaking. As the left pivot arm 2 and the right pivot arm 3 rotate inward and close, the left support plate 5 and the right support plate 6 are respectively separated from the top of the intermediate bracket 1. The first torsion spring elastically recovers, eventually causing the left support plate 5 to rest against the left pivot arm 2, and the second torsion spring 64 elastically recovers, eventually causing the right support plate 6 to rest against the right pivot arm 3, making operation more convenient, stable, and reliable.

[0047] Compared with the prior art, the advantages of the present invention are as follows: the left rotating arm 2 and the right rotating arm 3 rotate in opposite directions relative to the intermediate bracket 1, and at the same time, the first bevel gear structure 21 on the left rotating arm 2 and the second bevel gear structure 31 on the right rotating arm 3 respectively cooperate with the two first bevel gears 41 of the synchronous reverse rotation mechanism 4, and the gear assembly 42 ensures that the two first bevel gears 41 rotate synchronously in opposite directions, so that the left rotating arm 2 and the right rotating arm 3 rotate synchronously in opposite directions, thereby realizing the opening, flattening and inward folding and closing of the corresponding flexible screen; the rotation axis of the left rotating arm 2 and the right rotating arm 3 are aligned with each other. The rotation axes are parallel, the rotation axes of the two first bevel gears 41 are parallel, the rotation axes of the left rotating arm 2 and the right rotating arm 3 are respectively perpendicular to the rotation axes of the two first bevel gears 41, which can convert horizontal rotation into vertical rotation; the first cam 43 of the synchronous reverse rotation mechanism 4 is elastically pressed against the cam structure 4211, which can provide torsional force or friction damping force for the synchronous reverse rotation of the two second spur gears 422, so as to realize the opening and closing feel of various mobile terminals such as mobile phones and tablet computers with flexible screens, and the first elastic Component 44 adopts a leaf spring, which is easy to adjust. As the left rotating arm 2 and the right rotating arm 3 rotate inward and close, the left support plate 5 can rotate outward with the hinge of the left rotating arm 2 and the left support plate 5 as the center. At the same time, the right support plate 6 can rotate outward with the hinge of the right rotating arm 3 and the right support plate 6 as the center, so that an inverted V-shaped avoidance interval can be formed between the left support plate 5 and the right support plate 6, which is convenient for the flexible screen to curl freely at the bend to form a water drop shape, which can reduce the stress in the flexible screen and avoid damage to the flexible screen. As the left rotating arm 2 and the right rotating arm 3 rotate outward to open It unfolds flatly, and the top of the middle bracket 1 can support the left support plate 5 and the right support plate 6 respectively, to ensure the flatness of the flexible screen during opening and use, with high stability and reliability, so that the flexible screen can be better applied to various mobile terminals such as mobile phones and tablets; the structure is compact and stable, which saves space, reduces the volume, is simple and convenient 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 enhancing the competitiveness of the product and expanding the application and development of the product.

[0048] The above descriptions are merely some embodiments of the present disclosure and are intended to illustrate the technical solutions of the present disclosure, not to limit them. It should be understood that those skilled in the art may make modifications or substitutions based on the above descriptions without departing from the inventive concept of the present disclosure, and all such modifications and substitutions shall fall within the scope of protection of the appended claims of the present disclosure. In such cases, all details may be replaced with equivalent elements, and the materials, shapes, and dimensions may be arbitrary.

Claims

1. A hinge for an inward-folding flexible screen mobile terminal, characterized in that: The invention comprises an intermediate bracket (1) and a left rotating arm (2) and a right rotating arm (3) rotatably connected to the intermediate bracket (1); the intermediate bracket (1) is capable of causing the left rotating arm (2) and the right rotating arm (3) to rotate synchronously in the opposite direction via a synchronous reverse rotation mechanism (4); the synchronous reverse rotation mechanism (4) comprises two first bevel gears (41) capable of rotating synchronously in the opposite direction; the two first bevel gears (41) are connected to each other by a gear assembly (42); the left rotating arm (2) is provided with a first bevel gear structure (21) meshing with one of the first bevel gears (41); the right rotating arm (3) is provided with a second bevel gear structure (31) meshing with the other first bevel gear (41); the rotation axis of the left rotating arm (2) is parallel to the rotation axis of the right rotating arm (3); the rotation axes of the two first bevel gears (41) are parallel; and the rotation axis of the left rotating arm (2) is perpendicular to the rotation axis of the first bevel gear (41); The gear assembly (42) includes a first spur gear (421) and two second spur gears (422), the first spur gear (421) meshes with the two second spur gears (422) respectively, the two second spur gears (422) can rotate synchronously in opposite directions, the second spur gears (422) correspond to the first bevel gears (41) one by one, and the second spur gears (422) are coaxially connected to the corresponding first bevel gears (41); It also includes a left support plate (5) and a right support plate (6) for supporting the corresponding flexible screen, wherein the left support plate (5) cooperates with the left rotating arm (2), and the right support plate (6) cooperates with the right rotating arm (3). The left support plate (5) is provided with a first connecting shaft (53), the left rotating arm (2) is provided with a first connecting portion (24) hinged to the first connecting shaft (53), the first connecting portion (24) is provided with a connecting hole hinged to the first connecting shaft (53), the right support plate (6) is provided with a second connecting shaft (63), the right rotating arm (3) is provided with a second connecting portion hinged to the second connecting shaft (63), and the second connecting portion is provided with a connecting hole hinged to the second connecting shaft (63).

2. The hinge of an inward-folding flexible screen mobile terminal according to claim 1, characterized in that: The synchronous reverse rotation mechanism (4) further comprises a first cam (43) matched with the first spur gear (421) and a first elastic element (44) matched with the first cam (43); one end of the first spur gear (421) is provided with a cam structure (4211) matched with the first cam (43); the first elastic element (44) enables the first cam (43) to elastically match with the cam structure (4211) to provide torque for the synchronous reverse rotation of the two second spur gears (422).

3. The hinge of an inward-folding flexible screen mobile terminal according to claim 2, characterized in that: The intermediate bracket (1) is provided with a first fixed shaft (11) rotatably connected to the first spur gear (421), the first cam (43) is located above the first spur gear (421) and is sleeved on the first fixed shaft (11), the cam structure (4211) is located at the top of the first spur gear (421), the first elastic element (44) is a leaf spring and is located above the first cam (43), the two ends of the first elastic element (44) are respectively connected to the intermediate bracket (1), the middle part of the first elastic element (44) is elastically pressed against the top of the first cam (43), and the middle part of the first elastic element (44) is provided with a first through hole (441) that matches the first fixed shaft (11).

4. The hinge of the inward-folding flexible screen mobile terminal according to claim 3, characterized in that: The second spur gear (422) is integrally formed with its corresponding first bevel gear (41), and a first fixing block (12) for defining the gear assembly (42) and the two first bevel gears (41) is provided on the intermediate bracket (1).

5. The hinge of an inward-folding flexible screen mobile terminal according to claim 4, characterized in that: A first slot (13) is provided on the intermediate bracket (1), and the synchronous reverse rotation mechanism (4), the first fixed shaft (11) and the first fixed block (12) are located in the first slot (13).

6. The hinge of an inward-folding flexible screen mobile terminal according to any one of claims 1 to 5, characterized in that: A first arc-shaped sliding portion (22) is provided at one end of the left rotating arm (2), and the first bevel gear structure (21) is located on one side of the first arc-shaped sliding portion (22); a second arc-shaped sliding portion (32) is provided at one end of the right rotating arm (3), and the second bevel gear structure (31) is located on one side of the second arc-shaped sliding portion (32); and a first arc-shaped slideway (101) is provided on the intermediate bracket (1) and is respectively matched with the first arc-shaped sliding portion (22) and the second arc-shaped sliding portion (32).

7. The hinge of an inward-folding flexible screen mobile terminal according to claim 6, characterized in that: The intermediate bracket (1) is provided with a second fixed block (14) that cooperates with the first arc-shaped sliding portion (22) and a third fixed block (15) that cooperates with the second arc-shaped sliding portion (32); a first protruding edge (23) is provided on the side of the first arc-shaped sliding portion (22) away from the first bevel gear structure (21); a first arc-shaped sliding groove that cooperates with the first protruding edge (23) is provided on the second fixed block (14); a second protruding edge (33) is provided on the side of the second arc-shaped sliding portion (32) away from the second bevel gear structure (31); and a second arc-shaped sliding groove that cooperates with the second protruding edge (33) is provided on the third fixed block (15).

8. The hinge of an inward-folding flexible screen mobile terminal according to claim 6, characterized in that: The end of the left rotating arm (2) away from the first arc-shaped sliding portion (22) is hinged to the end of the left supporting plate (5) away from the intermediate bracket (1), and the end of the right rotating arm (3) away from the second arc-shaped sliding portion (32) is hinged to the end of the right supporting plate (6) away from the intermediate bracket (1). As the flexible screen folds inward and closes, the end of the left supporting plate (5) close to the intermediate bracket (1) and the end of the right supporting plate (6) close to the intermediate bracket (1) can be swung outwards to avoid the bending part of the flexible screen. As the flexible screen is unfolded and flattened, the top of the intermediate bracket (1) can support the left supporting plate (5) and the right supporting plate (6) respectively.

9. The hinge of an inward-folding flexible screen mobile terminal according to claim 8, characterized in that: The left support plate (5) is provided with a first avoidance groove (51) cooperating with the left rotating arm (2) and a second avoidance groove (52) cooperating with the right rotating arm (3); the right support plate (6) is provided with a third avoidance groove (61) cooperating with the right rotating arm (3) and a fourth avoidance groove (62) cooperating with the left rotating arm (2).

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