U-shaped hinge and mobile terminal

Abstract

The present invention discloses a U-shaped hinge and a mobile terminal, comprising a hinge mechanism, wherein the hinge mechanism comprises: a left middle frame and a right middle frame for supporting a flexible display screen; a damping mechanism arranged in the middle of the U-shaped hinge seat, for realizing damped rotational motion between the middle frame and a rotation axis and automatic closing of the middle frame through a distance difference generated by an internal cam mechanism; two synchronization mechanisms symmetrically arranged at both ends of the U-shaped hinge seat, for providing mechanical rotation feedback and folding and stopping; and two locking mechanisms arranged between the damping mechanism and the synchronization mechanism, for preventing the hinge from being over-folded. The present invention provides a damping mechanism so that the terminal generates damping when rotating, so that the user experience of the terminal is better. At the same time, due to the simple structure and low manufacturing cost, it can be better adapted to a variety of mobile terminals (mobile phones, laptops, tablet computers, etc.) or other terminals with folding display requirements, and has good adaptability.

Description

Technical Field

[0001] The present invention relates to the field of electronic equipment, and in particular to a U-shaped hinge and a mobile terminal. Background Art

[0002] Flexible screen is a kind of flexible screen, which refers to flexible OLED. The successful mass production of flexible screen is not only limited to the manufacturing of the new generation of high-end smartphones, but also has a profound impact on the application of wearable devices due to its low power consumption and bendable characteristics.

[0003] Flexible screens are developing very fast, but the development of folding hinges used in flexible screens is still relatively slow. Many flexible screens use old-style hinges and shells. When the shells rotate through the hinges, the rotation synchronization between the shells is poor. At the same time, the linkage feedback of the internal structure is poor, and the smoothness of the hinge rotation cannot be guaranteed. The stress during the hinge rotation process can easily damage the terminal device, resulting in a significant reduction in the service life of the terminal device. It also reduces people's favorability for the use of flexible folding screen devices, and is not conducive to the promotion and sales of flexible folding screen devices. Summary of the invention

[0004] The purpose of the present invention is to provide a U-shaped hinge and a mobile terminal to solve the problem raised in the above background technology that many traditional flexible screens use hinges and shells that are old-style shells. When the shells rotate through the hinges, the rotation synchronization between the shells is poor. At the same time, the linkage feedback of the internal structure is poor, and the smoothness of the hinge rotation cannot be guaranteed. The stress during the hinge rotation process can easily damage the terminal device, resulting in a greatly reduced service life of the terminal device.

[0005] To achieve the above object, the present invention provides the following technical solution: a U-shaped hinge, comprising a hinge mechanism, wherein the hinge mechanism comprises:

[0006] There are multiple mounting holes preset on the inner side, and they are used for the U-shaped hinge seat of the hinge rotating assembly. The left middle frame and the right middle frame for supporting the flexible display are respectively arranged on both sides of the U-shaped hinge seat;

[0007] It is set in the middle of the U-shaped hinge seat and is installed with the left middle frame, the right middle frame and the mounting holes through screws. It is used to keep the flexible display screen at a constant length when the hinge rotates, and to realize the damping rotation movement between the middle frame and the rotation axis and the automatic closing of the middle frame through the distance difference generated by the internal cam mechanism;

[0008] Symmetrically arranged at both ends of the U-shaped hinge seat, installed with screws and corresponding mounting holes, and driven by a meshing synchronous even-numbered gear transmission system to drive the terminal housing to rotate synchronously, provide mechanical rotation feedback and two synchronous mechanisms that stop and fold;

[0009] The two locking mechanisms are arranged between the damping mechanism and the synchronization mechanism, installed with the left middle frame and the right middle frame by screws, and used for quick locking when the hinge is unfolded to prevent the hinge from over-bending.

[0010] As a preferred technical solution of the present invention, the damping mechanism includes a fixed seat fixedly installed by screws and the inner mounting holes of the U-shaped hinge seat, three fixed partitions are equidistantly fixed on the top of the fixed seat, a damping compression spring mechanism is installed on both sides of the three fixed partitions, and a left connecting member and a right connecting member are respectively installed on both sides of the fixed seat through two damping compression spring mechanisms.

[0011] As a preferred technical solution of the present invention, the damping compression spring mechanism includes a compression spring shaft fixedly connected to one side of the three fixed partitions, the outside of the compression spring shaft is also sleeved with a damping cam placed between two adjacent fixed partitions, and one side of each damping cam is fixedly connected with a damping compression spring sleeved on the outside of the compression spring shaft;

[0012] The left connecting member includes two left guide rail fixed concave wheels respectively matched with two damping cams on one of the compression spring shafts, one end of the two left guide rail fixed concave wheels away from the damping cam is slidably connected with a left concave wheel track block through a through hole provided therein to match the damping guide rail shaft and the retaining spring, and the left concave wheel track block is connected to the left middle frame through screws, and the right connecting member includes two right guide rail fixed concave wheels respectively matched with two damping cams on the other of the compression spring shafts, one end of the two right guide rail fixed concave wheels away from the damping cam is slidably connected with a right concave wheel track block through a through hole provided therein to match the damping guide rail shaft and the retaining spring, and the right concave wheel track block is connected to the right middle frame through screws;

[0013] The guide rail fixed cam cooperates with the cam track block to form a cam mechanism.

[0014] As a preferred technical solution of the present invention, the synchronization mechanism includes a first bridge gear seat and a second bridge gear seat installed by screws and mounting holes on the inner side of the U-shaped hinge seat, between which two bridge gear shafts and two synchronous gear seats are installed, a left-rotating gear frame and a right-rotating gear frame are respectively arranged between one side of the two synchronous gear seats and the two bridge gear seats, two synchronous gears respectively meshing with the two bridge gears on the two bridge gear shafts are also installed between the two synchronous gear seats, the other two bridge gears on the two bridge gear shafts are respectively meshed with the gear rings of the left-rotating gear frame and the right-rotating gear frame, one side of the left-rotating gear frame and the right-rotating gear frame are both provided with arc guide strips, the two arc guide strips are respectively slidingly connected with the arc guide grooves arranged on the inner sides of the first bridge gear seat and the second bridge gear seat, and the synchronous gears are meshed with the bridge gears to form a synchronous even-numbered gear transmission system.

[0015] As a preferred technical solution of the present invention, the locking mechanism includes a lock seat and an insert plate placed on the inner side of the U-shaped hinge seat, a lock groove is opened in the middle of the lock seat, a spring is fixedly connected in an opening of a groove wall on one side of the lock groove, a locking head is installed at one end of the spring, the locking head is engaged with the lock hole opened in the insert plate, and the lock seat and the insert plate are respectively connected to the left middle frame and the right middle frame.

[0016] A mobile terminal comprises a U-shaped hinge as described in any one of the above, and also comprises a left shell and a right shell respectively located on both sides of the hinge mechanism and forming a terminal shell, wherein the left shell and the right shell are respectively installed and fixed to the left rotating gear frame and the right rotating gear frame.

[0017] As a preferred technical solution of the present invention, a left support plate and a right support plate for smoothly supporting the rotation of the flexible display screen are respectively installed on the inner sides of the left shell and the right shell, and the left support plate and the right support plate are fixedly connected to the flexible display screen.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1) The damping mechanism is set up so that the terminal will generate damping when rotating, and the damping generated on the left and right sides of the terminal is equal, so that the user experience of the terminal is better. At the same time, the cam mechanism set by the damping mechanism enables the damping cam of the guide rail fixed concave wheel to rotate with the damping cam. When the damping limit position is exceeded, the hinge can be automatically closed. The damping compression spring is matched with the cam mechanism and the concave wheel track block is slidably matched with the damping guide rail shaft to prevent the hinge from being locked during the rotation process, further improving the user experience of the terminal;

[0020] 2) Through the synchronization mechanism, the synchronous even-numbered gear transmission system cooperates with the two rotating gear racks to drive the left housing and the right housing to rotate synchronously respectively, and the symmetrical synchronous movement generated by the combination of the even-numbered gears is used to shorten the input rotation stroke of the terminal housing to 1 / 2 of the output rotation stroke, and when the bridge gear meshes with the synchronous gear and the special-shaped gear ring to rotate, it can produce a good mechanical feedback to the hand, and the left housing and the right housing can be folded and stopped at the same time, which is convenient for the use of the mobile terminal and the promotion and sales of the product;

[0021] 3) By setting a locking mechanism, the hinge can be quickly locked when it is fully opened to prevent the hinge from being over-folded and causing damage to the flexible display screen;

[0022] 4) This type of U-shaped hinge has a simple structure, low manufacturing cost, and long service life, and can be better adapted to a variety of mobile terminals (mobile phones, laptops, tablets, etc.) or other terminals with folding display requirements, and has good adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 It is a schematic diagram of the hinge mechanism of the present invention;

[0025] Figure 3 It is a schematic diagram of the structure of the damping mechanism of the present invention;

[0026] Figure 4 It is a schematic diagram of the closed structure of the damping mechanism of the present invention;

[0027] Figure 5 It is a schematic diagram of the disassembly of the damping mechanism of the present invention;

[0028] Figure 6 It is a schematic diagram of the closed structure of the synchronization mechanism of the present invention;

[0029] Figure 7 It is a schematic diagram of the structure of the synchronization mechanism of the present invention;

[0030] Figure 8 It is a schematic diagram of the disassembly of the synchronization mechanism of the present invention;

[0031] Fig. 9 It is a schematic diagram of the closed structure of the locking mechanism of the present invention;

[0032] Fig.10 It is a schematic diagram of the expanded structure of the locking mechanism of the present invention;

[0033] Fig.11 It is a schematic diagram of the disassembly of the locking mechanism of the present invention;

[0034] Fig.12 It is a fully expanded schematic diagram of the present invention;

[0035] Fig.13 It is a completely closed schematic diagram of the present invention.

[0036] In the figure: 1, hinge mechanism; 11, U-shaped hinge seat; 12, left middle frame; 13, right middle frame; 1a, damping mechanism; 1a1, fixed seat; 1a11, fixed partition; 1a2, left connecting piece; 1a21, left guide rail fixed concave wheel; 1a3, right connecting piece; 1a31, right guide rail fixed concave wheel; 1a4, damping compression spring mechanism; 1a41, compression spring shaft; 1a42, damping cam; 1a43, damping compression spring; 1a5, left concave wheel track block; 1a6, right concave wheel Track block; 1a7, damping guide rail shaft; 1b, synchronization mechanism; 1b1, first bridge gear seat; 1b2, second bridge gear seat; 1b3, synchronization gear seat; 1b4, synchronization gear; 1b5, bridge gear shaft; 1b6, left rotating gear rack; 1b7, right rotating gear rack; 1c, locking mechanism; 1c1, lock seat; 1c11, spring; 1c12, locking head 1c2, insert; 2, left housing; 21, left support plate; 3, right housing; 31, right support plate. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Example 1

[0039] See also Figure 1-2 The present invention provides a U-shaped hinge, including a hinge mechanism 1, wherein the hinge mechanism 1 includes:

[0040] A plurality of mounting holes are preset on the inner side, and are used for a U-shaped hinge seat 11 of the hinge rotating assembly. A left middle frame 12 and a right middle frame 13 for supporting the flexible display screen are respectively arranged on both sides of the U-shaped hinge seat 11;

[0041] The damping mechanism 1a is arranged in the middle of the U-shaped hinge seat 11, and is installed with the left middle frame 12, the right middle frame 13 and the installation holes through screws, and is used to keep the flexible display screen at a constant length when the hinge rotates, and realizes the damping rotation movement between the middle frame and the rotation axis and the automatic closing of the middle frame through the distance difference generated by the internal cam mechanism;

[0042] Symmetrically arranged at both ends of the U-shaped hinge seat 11, installed with screws and corresponding mounting holes, and driven by a meshing synchronous even-numbered gear transmission system to drive the terminal housing to rotate synchronously, provide mechanical rotation feedback and two synchronization mechanisms 1b that stop and fold with each other;

[0043] The two locking mechanisms 1c are arranged between the damping mechanism 1a and the synchronization mechanism 1b, installed with the left middle frame 12 and the right middle frame 13 by screws, and used for fast locking when the hinge is unfolded to prevent the hinge from being over-folded.

[0044] In this embodiment, please refer to Figure 5 As shown, the damping mechanism 1a includes a fixed seat 1a1 fixedly installed with the mounting holes on the inner side of the U-shaped hinge seat 11 by screws, three fixed partitions 1a11 are fixedly installed at equal distances on the top of the fixed seat 1a1, and a damping compression spring mechanism 1a4 is installed on both sides of the three fixed partitions 1a11, and a left connecting member 1a2 and a right connecting member 1a3 are respectively installed on both sides of the fixed seat 1a1 through two damping compression spring mechanisms 1a4; the damping compression spring mechanism 1a4 includes a compression spring shaft 1a41 fixedly inserted and connected to one side of the three fixed partitions 1a11, and the outside of the compression spring shaft 1a41 is also sleeved with a damping cam 1a42 placed between two adjacent fixed partitions 1a11, and one side of each damping cam 1a42 is fixedly connected with a damping compression spring 1a43 sleeved on the outside of the compression spring shaft 1a41; the left connecting member 1a2 includes a compression spring shaft 1a41 fixedly inserted and connected to one side of the three fixed partitions 1a11, and the damping cam 1a42 is sleeved on the outside of the compression spring shaft 1a41. The two left guide rail fixed cams 1a21 cooperate with the two damping cams 1a42 on the compression spring shaft 1a41, and the ends of the two left guide rail fixed cams 1a21 away from the damping cam 1a42 are slidably connected with the left cam track block 1a5 through the through holes opened to cooperate with the damping guide rail shaft 1a7 and the retaining spring, and the left cam track block 1a5 is connected to the left middle frame 12 through screws, and the right connecting member 1a3 includes two right guide rail fixed cams 1a31 respectively cooperate with the two damping cams 1a42 on the other compression spring shaft 1a41, and the ends of the two right guide rail fixed cams 1a31 away from the damping cam 1a42 are slidably connected with the right cam track block 1a6 through the through holes opened to cooperate with the damping guide rail shaft 1a7 and the retaining spring, and the right cam track block 1a6 is connected to the right middle frame 13 through screws; the guide rail fixed cams cooperate with the cam track blocks to form a cam mechanism.

[0045] Specifically, when the terminal is expanded, Figure 4As shown, by turning the left housing 2 counterclockwise and the right housing 3 clockwise, the forces act on the left middle frame 12 and the right middle frame 13 respectively, and the counterclockwise rotating left middle frame 12 drives the left cam track block 1a5 to slide on one of the damping guide rail shafts 1a7, so that when the hinge is unfolded, the counterclockwise rotating left guide rail fixed cam 1a21 is compensated for the distance, and the clockwise rotating right middle frame 13 drives the right cam track block 1a6 to slide on the other damping guide rail shaft 1a7. , so that when the hinge is unfolded, the distance compensation is performed on the right guide rail fixed cam 1a31 that rotates instantaneously, and when the left guide rail fixed cam 1a21 and the right guide rail fixed cam 1a31 rotate, their cams can rotate with the corresponding damping cam 1a42. At the same time, under the action of the damping compression spring 1a43, the terminal will generate a certain damping during the unfolding process, and under the action of the synchronization mechanism 1b, the damping size on both sides is the same when the terminal is unfolded, thereby improving the use feel;

[0046] When the terminal is closed, Figure 3 As shown, by turning the left shell body 2 clockwise and the right shell body 3 counterclockwise, the left middle frame 12, the right middle frame 13, the left cam track block 1a5, the right cam track block 1a6, the left guide rail fixed cam 1a21 and the right guide rail fixed cam 1a31 all rotate in the opposite direction to that when the terminal is unfolded, and the left cam track block 1a5 and the right cam track block 1a6 will also slide on the corresponding damping guide rail shaft 1a7, so that when the hinge is closed, the rotation of the left guide rail fixed cam 1a21 and the right guide rail fixed cam 1a31 is compensated for the distance, and under the action of the damping compression spring 1a43, the terminal will generate equal damping during the closing process. At the same time, during the rotation of the cam of the guide rail fixed cam and the damping cam 1a42, when the damping limit position is exceeded, the left middle frame 12 and the right middle frame 13 can be automatically closed, further improving the feel of the terminal.

[0047] In this embodiment, please refer to Figure 8As shown, the synchronization mechanism 1b includes a first bridge gear seat 1b1 installed with a mounting hole on the inner side of a U-shaped hinge seat 11 by screws, two bridge gear shafts 1b5 and two synchronization gear seats 1b3 are installed between the second bridge gear seat 1b2, a left-rotating gear frame 1b6 and a right-rotating gear frame 1b7 are respectively arranged between one side of the two synchronization gear seats 1b3 and the two bridge gear seats, and two gears are also installed between the two synchronization gear seats 1b3 to mesh with the two bridge gears on the two bridge gear shafts 1b5. The other two bridge gears on the two bridge gear shafts 1b5 are respectively meshed with the gear rings of the left rotating gear frame 1b6 and the right rotating gear frame 1b7. One side of the left rotating gear frame 1b6 and the right rotating gear frame 1b7 is provided with an arc guide bar. The two arc guide bars are respectively slidably connected with the arc guide grooves provided on the inner sides of the first bridge gear seat 1b1 and the second bridge gear seat 1b2, and the synchronous gear 1b4 is meshed with the bridge gear to form a synchronous even-numbered gear transmission system.

[0048] Specifically, when the terminal is expanded, Figure 7 As shown, by turning the left housing 2 counterclockwise and the right housing 3 clockwise, the forces act on the left rotating gear frame 1b6 and the right rotating gear frame 1b7 respectively, and the gear ring of the left rotating gear frame 1b6 rotating counterclockwise will drive the bridge gear on one of the bridge gear shafts 1b5 to rotate. Since the two bridge gear shafts 1b5 are meshed and connected with an even number of synchronous gears 1b4, the bridge gear on the other bridge gear shaft 1b5 is also rotated, and then the right housing 3 is driven to rotate synchronously through the right rotating gear frame 1b7; under the action of the meshing gears, the rotation stroke of the hinge input is shortened to 1 / 2 of the output rotation stroke, and then under the action of the synchronization mechanism 1b, the synchronous rotation of the terminal housing is realized;

[0049] When the terminal is closed, Figure 6 As shown, by turning the left housing 2 clockwise and the right housing 3 counterclockwise, the left rotating gear frame 1b6 and the right rotating gear frame 1b7 can also achieve synchronous rotation of the housings under the action of the synchronous even-numbered gear transmission system.

[0050] In this embodiment, please refer to Fig.11 As shown, the locking mechanism 1c includes a lock seat 1c1 and an insert 1c2 placed on the inner side of the U-shaped hinge seat 11, a lock groove is opened in the middle of the lock seat 1c1, a spring 1c11 is fixedly connected in an opening of a groove wall on one side of the lock groove, a locking head 1c12 is installed at one end of the spring 1c11, the locking head 1c12 is engaged with the lock hole opened in the insert 1c2, and the lock seat 1c1 and the insert 1c2 are respectively connected to the left middle frame 12 and the right middle frame 13.

[0051] Specifically, when the terminal is expanded, Fig.10 As shown, by turning the left housing 2 counterclockwise and the right housing 3 clockwise, the lock seat 1c1 and the inserting piece 1c2 gradually move closer to each other. When the mobile terminal is fully unfolded, one side of the inserting piece 1c2 is placed in the lock slot, and the lock hole and the locking head 1c12 are locked. At this time, the elastic force applied by the spring 1c11 to the locking head 1c12 is greater than the damping generated by the damping mechanism 1a, ensuring that the terminal can quickly enter the locked state when it is fully unfolded.

[0052] When the terminal is closed, Fig. 9 As shown, by turning the left housing 2 clockwise and the right housing 3 counterclockwise, the lock seat 1c1 and the insert 1c2 are gradually separated, and the lock hole of the insert 1c2 is disengaged from the locking head 1c12, and the locking head 1c12 is reset under the action of the spring 1c11, and the locking state is released;

[0053] The locking head 1c12 can be a spherical, hemispherical, or other symmetrically shaped component.

[0054] A mobile terminal, comprising any one of the above-mentioned U-shaped hinges, and also comprising a left shell 2 and a right shell 3 (such as Fig.12 As shown), the left shell 2 and the right shell 3 are respectively installed and fixed to the left rotating gear frame 1b6 and the right rotating gear frame 1b7, so that this U-shaped hinge can be adapted to a better mobile terminal.

[0055] Furthermore, a left support plate 21 and a right support plate 31 are respectively installed on the inner sides of the left shell 2 and the right shell 3 to smoothly support the rotation of the flexible display screen, and the left support plate 21 and the right support plate 31 are fixedly connected to the flexible display screen to ensure that the flexible display screen can be stably supported by the left support plate 21 and the right support plate 31 in cooperation with the left middle frame 12 and the right middle frame 13.

[0056] It should also be noted that: since the geometric axis of the gear ring of the rotating gear rack is close to the flexible display screen, when the left housing 2 and the right housing 3 rotate to the closed position (such as Fig.13 As shown in the figure, the flexible display screen is folded to form a small R angle. When the left shell 2 rotates 90° clockwise and the right shell 3 rotates 90° counterclockwise under the action of the synchronization mechanism 1b, the state of the flexible display screen changes from a plane to a plane on the left side and a plane on the right side of the terminal. The two planes are parallel and the small R semicircle is formed at the bottom. The screen forms a "U" shape. The U-shaped part of the screen is naturally hidden inside the baffles at both ends of the U-shaped hinge seat 11.

[0057] In the description of the present invention, it is necessary to understand that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0058] In the present invention, unless otherwise clearly stipulated and limited, for example, it can be a fixed connection, a detachable connection, or an integrated one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A U-shaped hinge, characterized in that: A hinge mechanism is included, wherein the hinge mechanism comprises: There are multiple mounting holes preset on the inner side, and they are used for the U-shaped hinge seat of the hinge rotating assembly. The left middle frame and the right middle frame for supporting the flexible display are respectively arranged on both sides of the U-shaped hinge seat; It is set in the middle of the U-shaped hinge seat and is installed with the left middle frame, the right middle frame and the mounting holes through screws. It is used to keep the flexible display screen at a constant length when the hinge rotates, and to realize the damping rotation movement between the middle frame and the rotation axis and the automatic closing of the middle frame through the distance difference generated by the internal cam mechanism; Symmetrically arranged at both ends of the U-shaped hinge seat, installed with screws and corresponding mounting holes, and driven by a meshing synchronous even-numbered gear transmission system to drive the terminal housing to rotate synchronously, provide mechanical rotation feedback and two synchronous mechanisms that stop and fold; Two locking mechanisms are arranged between the damping mechanism and the synchronization mechanism, installed with the left middle frame and the right middle frame by screws, and used for fast locking when the hinge is unfolded to prevent the hinge from being over-folded; The damping mechanism comprises a fixing seat fixedly installed by screws and mounting holes inside the U-shaped hinge seat, three fixing partitions are fixedly installed at equal distances on the top of the fixing seat, a damping compression spring mechanism is installed on both sides of the fixing seat, and a left connecting member and a right connecting member are respectively installed on both sides of the fixing seat through two damping compression spring mechanisms; The damping compression spring mechanism comprises a compression spring shaft fixedly connected to one side of the three fixed partitions, the outside of the compression spring shaft is also sleeved with a damping cam placed between two adjacent fixed partitions, and one side of each damping cam is fixedly connected with a damping compression spring sleeved on the outside of the compression spring shaft; The left connecting member comprises two left guide rail fixed concave wheels respectively matched with two damping cams on one of the compression spring shafts, one end of the two left guide rail fixed concave wheels away from the damping cam is slidably connected with a left concave wheel track block through a through hole provided therein to match the damping guide rail shaft and the retaining spring, and the left concave wheel track block is connected to the left middle frame through screws, and the right connecting member comprises two right guide rail fixed concave wheels respectively matched with two damping cams on the other compression spring shaft, one end of the two right guide rail fixed concave wheels away from the damping cam is slidably connected with a right concave wheel track block through a through hole provided therein to match the damping guide rail shaft and the retaining spring, and the right concave wheel track block is connected to the right middle frame through screws; The synchronization mechanism includes a first bridge gear seat and a second bridge gear seat which are installed by screws and mounting holes on the inner side of the U-shaped hinge seat, two bridge gear shafts and two synchronous gear seats are installed between the first bridge gear seat and the second bridge gear seat, a left-rotating gear frame and a right-rotating gear frame are respectively arranged between one side of the two synchronous gear seats and the two bridge gear seats, two synchronous gears are also installed between the two synchronous gear seats, and the outer sides of the two synchronous gears are respectively meshed with a bridge gear on the two bridge gear shafts after the two synchronous gears are meshed, and the other two bridge gears on the two bridge gear shafts are respectively meshed and connected with the gear rings of the left-rotating gear frame and the right-rotating gear frame, and an arc guide strip is arranged on one side of the left-rotating gear frame and the right-rotating gear frame, and the two arc guide strips are respectively slidably connected with the arc guide grooves arranged on the inner sides of the first bridge gear seat and the second bridge gear seat, and the synchronous gears are meshed and connected with the bridge gears to form a synchronous even-numbered gear transmission system; The locking mechanism comprises a lock seat and an insert plate placed inside the U-shaped hinge seat, a lock slot is provided in the middle of the lock seat, a spring is fixedly connected in an opening of a slot wall on one side of the lock slot, a locking head is installed at one end of the spring, the locking head is engaged with a lock hole provided in the insert plate, and the lock seat and the insert plate are connected to the left middle frame and the right middle frame respectively; The left guide rail fixed cam and the right guide rail fixed cam both include an extended cover plate portion, and the cover plate portion is located above the corresponding damping compression spring and the compression spring shaft.

2. A mobile terminal, comprising the U-shaped hinge according to claim 1, characterized in that: It also includes a left shell and a right shell which are respectively located on both sides of the hinge mechanism and form a terminal shell. The left shell and the right shell are respectively installed and fixed to the left rotating gear frame and the right rotating gear frame.

3. A mobile terminal according to claim 2, characterized in that: A left supporting plate and a right supporting plate for smoothly supporting the rotation of the flexible display screen are respectively installed on the inner sides of the left shell and the right shell, and the left supporting plate and the right supporting plate are fixedly connected to the flexible display screen.

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