Rotary hinge and electronic equipment

Abstract

The invention relates to the technical field of hinges, and provides a rotary hinge and electronic equipment. The rotary hinge comprises a hinge shaft body, a rotary assembly and a driving assembly; the hinge shaft body extends in the first direction, and one end of the hinge shaft body forms a connecting end. The rotating assembly is provided with a mounting part connected with the connecting end in the first direction, and the rotating assembly is provided with an autorotation axis in the second direction; the driving assembly is in transmission connection with the rotating assembly and used for driving the rotating assembly to rotate in the second direction. The first direction is perpendicular to the second direction; the hinge shaft body is provided with a mounting frame for mounting to-be-rotated equipment; the mounting frame can rotate along with the hinge shaft body in the first direction or rotate along with the rotating assembly in the second direction. The electronic equipment comprises the rotary hinge, independent reciprocating rotation of equipment to be rotated along two mutually perpendicular directions can be realized by the rotary hinge and the electronic equipment, when the rotary hinge is applied to a notebook computer, rotation of a screen relative to a plane of a machine body can be effectively realized, and the beneficial effect of a screen camera on a face tracking technology is realized.

Description

Technical Field

[0001] The present disclosure relates to the technical field of hinges, and in particular to a rotary hinge and an electronic device. Background Art

[0002] In recent years, the design of laptop computers has become more diverse and multifunctional. For example, with the application of face tracking technology, some laptop screens, in addition to the normal flipping and opening rotation relative to the body, also need to be able to rotate in real time in a horizontal plane relative to the body, so that the camera in the screen can track and collect facial images from all angles.

[0003] The conventional hinge with a single rotation function cannot meet the above requirements of the laptop computer. Therefore, there is an urgent need for a new type of hinge with a rotation function in the market to better solve the problem in the prior art that the laptop computer screen can rotate in real time in the plane relative to the body. Summary of the invention

[0004] The embodiments of the present disclosure provide a rotary hinge and an electronic device, in order to solve the problem that a hinge with a single rotation function in the prior art cannot satisfy the requirement of a screen rotating in a plane relative to a body.

[0005] The rotary hinge provided by the embodiment of the present disclosure includes a hinge shaft body, a rotating assembly and a driving assembly;

[0006] The hinge shaft body is extended along the first direction, and one end forms a connecting end;

[0007] The rotating assembly has a mounting portion for connecting the connecting end along the first direction, and the rotating assembly has a rotation axis along the second direction;

[0008] The driving assembly is in transmission connection with the rotating assembly, and is used to drive the rotating assembly to rotate around the second direction;

[0009] Wherein, the first direction and the second direction are perpendicular to each other;

[0010] The hinge shaft body has a mounting frame for mounting the equipment to be rotated;

[0011] The mounting bracket can rotate along with the hinge shaft body around the first direction, or can rotate along with the rotating assembly around the second direction.

[0012] In one possible implementation manner, the rotating assembly includes a rotating frame, a fixed frame and a transmission gear set;

[0013] The rotating frame has a rotating axis extending along the second direction;

[0014] The fixing frame is fixedly installed at the waiting installation station and is provided with an insertion hole for the rotating shaft to be inserted;

[0015] The transmission gear set is installed and sleeved on the circumferential surface of the shaft body of the rotating shaft, and is transmission-connected with the driving assembly;

[0016] Wherein, the driving assembly can drive the rotating frame to reciprocate around the second direction through the transmission gear set.

[0017] In one embodiment, the transmission gear set includes a transmission bevel gear and an encoder synchronous wheel which are synchronously mounted;

[0018] The transmission bevel gear is meshed and connected with the driving assembly accordingly;

[0019] The rotating assembly is also provided with an encoder gear for detecting the rotation angle of the rotating frame;

[0020] The encoder gear is meshed and connected with the encoder synchronous wheel accordingly.

[0021] In one possible implementation manner, the rotating assembly further comprises a locking structure disposed above the transmission bevel gear;

[0022] The positioning structure is provided with a first limiting point and a second limiting point along its diameter direction;

[0023] The rotating frame is provided with a triggering portion facing the locking structure;

[0024] When the rotating frame is at the starting position and the ending position of the rotating stroke, the trigger part is correspondingly limited and clamped by the first limit clamping point and the second limit clamping point.

[0025] In one possible implementation, the rotating assembly further includes a torsion plate;

[0026] The torsion plate is sleeved on one end of the rotating shaft away from the fixing frame, and is limitedly mounted on the rotating shaft by a torsion locking member;

[0027] The torsion plate can store or release torsional elastic force when the rotating shaft rotates.

[0028] In one possible implementation, the drive assembly includes a drive motor, a gearbox and a worm gear;

[0029] The output shaft end of the driving motor is connected to the gear transmission;

[0030] The output shaft end of the gear transmission is connected to the worm gear.

[0031] In one possible implementation manner, the driving motor and the gearbox are provided with two sets of corresponding transmission connections;

[0032] The two groups of driving motors and the gear box are symmetrically arranged at the two ends of the worm gear.

[0033] In one possible implementation manner, the rotating assembly further comprises a gear supporting member for supporting and protecting the transmission gear set;

[0034] The gear supporting member is arranged at one end of the rotating shaft away from the fixing frame, and is fixedly connected to the fixing frame via connecting screws.

[0035] In one embodiment, two mounting portions are symmetrically arranged along the first direction and about the center of the rotating assembly;

[0036] Each of the installation parts is respectively connected and correspondingly provided with one of the hinge shaft bodies.

[0037] In addition, an embodiment of the present disclosure further provides an electronic device, which includes a device body, a display screen and the above-mentioned rotary hinge;

[0038] The display screen is movably connected to the device body via the rotary hinge.

[0039] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

[0040] The rotary hinge provided by the embodiment of the present disclosure comprises a hinge shaft body which can drive the part to be installed to rotate around a first direction; the rotating component has a rotation axis along a second direction, and the driving component is transmission-connected to the rotating component and can drive the rotating component to rotate around the second direction, so that when the rotating component is driven to rotate around the second direction, the hinge shaft body and the part to be installed can rotate around the second direction together, thereby realizing relative rotation of the part to be installed in a horizontal plane.

[0041] The rotary hinge can not only realize the reciprocating rotation of the device to be rotated along with the hinge shaft body around the first direction, but also realize the reciprocating rotation of the device to be rotated along with the rotating component around the second direction, thereby realizing the independent reciprocating rotation of the device to be rotated along two mutually perpendicular directions. When applied to the screen of a laptop computer, it can effectively realize the rotation of the screen relative to the plane of the body and realize the beneficial effect of the screen camera on face tracking technology.

[0042] In addition, the electronic device provided by the embodiment of the present disclosure includes the above-mentioned rotary hinge, which can achieve the same beneficial effects and will not be further elaborated here.

[0043] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present disclosure are shown in an exemplary and non-limiting manner, in which:

[0045] In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.

[0046] Figure 1 A perspective view of a rotary hinge provided by an embodiment of the present disclosure is shown;

[0047] Figure 2 A three-dimensional diagram of a rotary hinge provided by an embodiment of the present disclosure is shown (without a fixing frame);

[0048] Figure 3 A three-dimensional half-section view of a rotary hinge provided by an embodiment of the present disclosure is shown;

[0049] Figure 4 A vertical half-section view of a rotary hinge provided by an embodiment of the present disclosure is shown;

[0050] Figure 5 A bottom perspective view of a rotary hinge provided by an embodiment of the present disclosure is shown;

[0051] Figure 6 A three-dimensional diagram of an electronic device provided by an embodiment of the present disclosure is shown.

[0052] Explanation of the numbers in the figure: 1. hinge body; 11. mounting bracket; 2. rotating assembly; 21. rotating bracket; 211. mounting portion; 212. rotating shaft; 22. fixing bracket; 23. transmission gear set; 231. transmission bevel gear; 232. encoder synchronous wheel; 233. gear supporting member; 24. encoder gear; 25. positioning structure; 26. torque plate; 261. torque locking member; 3. driving assembly; 31. driving motor; 32. gear transmission box; 33. worm gear; 4. equipment body; 5. display screen; X, first direction; Z, second direction. DETAILED DESCRIPTION

[0053] In order to make the purpose, features, and advantages of the present disclosure more obvious and easy to understand, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.

[0054] The embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0055] Combination Figure 1 and Figure 2 As shown, the embodiment of the present disclosure provides a rotary hinge, which includes a hinge body 1, a rotating assembly 2 and a driving assembly 3; the hinge body 1 is extended along a first direction X, and one end forms a connecting end; the rotating assembly 2 has a mounting portion 211 for connecting the connecting end along the first direction X, and the rotating assembly 2 has a rotation axis along a second direction Z; the driving assembly 3 is transmission-connected to the rotating assembly 2, and is used to drive the rotating assembly 2 to rotate around the second direction Z;

[0056] The first direction X and the second direction Z are perpendicular to each other; the hinge body 1 has a mounting frame 11 for mounting the device to be rotated; the mounting frame 11 can rotate around the first direction X with the hinge body 1, or rotate around the second direction Z with the rotating component 2.

[0057] The rotary hinge can be specifically but not limited to being applied to a screen hinge of a notebook computer, and this is taken as an example to illustrate the use process.

[0058] When the rotary hinge is used in practice, the hinge body 1 is first connected to the mounting portion 211 of the rotating component 2 respectively, and then the screen to be installed is fixed to the mounting frame 11 in the hinge body 1, so that the screen can rotate with the hinge body 1 around the first direction X to achieve the normal opening and closing function of the screen; and because the rotating component 2 has a rotation axis along the second direction Z, and the driving component 3 is connected to the rotating component 2 in a transmission manner, it can drive the rotating component 2 to rotate around the second direction Z, so that the fixing frame 22 in the rotating component 2 can be correspondingly installed in the body of the laptop computer, and when the driving component 3 drives the rotating component 2 to rotate around the second direction Z, the hinge body 1 and the screen can rotate together around the second direction Z to achieve the rotation of the screen relative to the computer body in the horizontal plane, so that the camera in the laptop screen swings left and right to achieve the camera's face tracking technology.

[0059] Of course, the rotating component 2 can be specifically driven by the driving component 3 to rotate around the second direction Z through automatic electrical control; the rotating component 2 can also be manually rotated around the second direction Z by the user by manually pushing the screen left and right, thereby fully ensuring the diversity of the reciprocating rotation of the rotating component 2 around the second direction Z.

[0060] To sum up, the rotary hinge provided in the embodiment of the present disclosure can not only realize the reciprocating rotation of the device to be rotated along with the hinge shaft body 1 around the first direction X, but also realize the reciprocating rotation of the device to be rotated along with the rotating component 2 around the second direction Z, thereby realizing the independent reciprocating rotation of the device to be rotated along two mutually perpendicular directions. When applied to the screen of a laptop computer, it can effectively realize the rotation of the screen relative to the plane of the fuselage and realize the beneficial effect of the screen camera on face tracking technology.

[0061] In one embodiment, the rotating component 2 includes a rotating frame 21, a fixed frame 22 and a transmission gear set 23; the rotating frame 21 has a rotating shaft 212 extending along the second direction Z; the fixed frame 22 is fixedly installed at the installation station, and is provided with an insertion hole for inserting the rotating shaft 212; the transmission gear set 23 is installed and sleeved on the axial surface of the rotating shaft 212, and is connected to the driving component 3 in transmission; wherein the driving component 3 can drive the rotating frame 21 to reciprocate around the second direction Z through the transmission gear set 23.

[0062] Specific, combined Figure 1 and Figure 2 To further explain in detail, the rotating component 2 is specifically configured to include a rotating frame 21, a fixed frame 22 and a transmission gear set 23, and the rotating frame 21 has a rotating shaft 212 extending along the second direction Z, and the transmission gear set 23 is installed and sleeved on the axial surface of the rotating shaft 212 and is connected to the driving component 3 in transmission. In this way, when the driving component 3 drives the transmission gear set 23 to rotate, it can drive the rotating frame 21 to reciprocate around the rotating shaft 212.

[0063] In addition, the fixed frame 22 is fixedly installed at the installation station and is provided with an insertion hole for the rotating shaft 212 to be inserted. On the one hand, this realizes the limited installation of the rotating component 2, and on the other hand, the insertion and matching of the rotating shaft 212 through the insertion hole can make the rotating shaft 212 only reciprocate around the second direction Z in the insertion hole, thereby realizing efficient limit and positioning of the rotating frame 21.

[0064] The specific configuration of the rotating assembly 2 has the beneficial effects of being simple in structure and being able to stably drive the hinge shaft body 1 to reciprocate around the second direction Z.

[0065] In one embodiment, the transmission gear set 23 includes a synchronously mounted transmission bevel gear 231 and an encoder synchronous wheel 232; the transmission bevel gear 231 is correspondingly meshed and connected with the driving component 3; the rotating component 2 is also provided with an encoder gear 24 for detecting the rotation angle of the rotating frame 21; the encoder gear 24 is correspondingly meshed and connected with the encoder synchronous wheel 232.

[0066] Specific, combined Figure 2To further explain in detail, the transmission gear set 23 includes a transmission bevel gear 231 and an encoder synchronous wheel 232 of a synchronous set, and the transmission bevel gear 231 is meshed and connected with the driving component 3, and the encoder synchronous wheel 232 is meshed and connected with the encoder gear 24 for detecting the rotation angle of the rotating frame 21. In this way, when the driving component 3 drives the transmission bevel gear 231 to rotate a certain angle, the encoder synchronous wheel 232 will rotate synchronously therewith, and the rotation angle will be accurately detected by the encoder gear 24, so as to avoid the transmission gear set 23 from rotating too much and exceeding the preset range of the rotating component 2, and the encoder gear 24 can also be electrically connected to the driving component 3 for feedback to control the working state of the driving component 3.

[0067] In addition, the absolute value encoder in the encoder gear 24 can determine the horizontal angle of the rotating frame 21 in real time, ensuring that the rotating frame 21 is always within a preset angle range.

[0068] The specific arrangement of the transmission gear set 23 and the encoder gear 24 has the beneficial effects of stable transmission, being able to accurately detect the real-time angle of the rotating frame 21 and ensuring that it is within a preset angle range.

[0069] In one embodiment, the rotating assembly 2 also includes a locking structure 25 arranged above the transmission bevel gear 231; the locking structure 25 is respectively provided with a first limit clamping point and a second limit clamping point along its own diameter direction; the rotating frame 21 is provided with a triggering part facing the locking structure 25; when the rotating frame 21 is at the starting and ending positions of the rotation stroke, the triggering part is respectively limited and clamped by the first limit clamping point and the second limit clamping point.

[0070] Specific, combined Figure 2 In further details, the rotating assembly 2 further includes a positioning structure 25 disposed above the transmission bevel gear 231, and the positioning structure 25 has a first limiting point and a second limiting point along its diameter direction, and the rotating frame 21 is provided with a trigger portion facing the positioning structure 25. In this way, when the rotating frame 21 is at the starting and ending positions of the rotating stroke, the trigger portion can be correspondingly positioned and positioned by the first limiting point and the second limiting point, so that the rotating frame 21 can be positioned and positioned at the starting and ending positions of the rotating stroke, thereby preventing the rotating frame 21 from exceeding the starting and ending positions during the rotation process.

[0071] The specific arrangement of the above-mentioned positioning structure 25 has the beneficial effects of simple structure and being able to limit and position the starting and ending positions of the rotating frame 21 .

[0072] In one embodiment, the rotating assembly 2 further includes a torsion plate 26 ; the torsion plate 26 is sleeved on one end of the rotating shaft 212 away from the fixed frame 22 , and is limitedly mounted on the rotating shaft 212 by a torsion locking member 261 ; the torsion plate 26 can store or release torsional elastic force when the rotating shaft 212 rotates.

[0073] Specific, combined Figure 3 and Figure 4 For further detailed description, a torque plate 26 is also provided in the rotating assembly 2, and the torque plate 26 is sleeved on one end of the rotating shaft 212 away from the fixed frame 22, and is limitedly installed on the rotating shaft 212 by a torque locking member 261. The torque plate 26 can store or release torsional elastic force when the rotating shaft 212 rotates.

[0074] In this way, when the rotating frame 21 is turned to rotate around the rotating shaft 212 in the manual mode, the transmission gear set 23 does not move, but the external force can overcome the torsional elastic force of the torsion plate 26, so that the rotating frame 21 can be twisted accordingly; when the driving component 3 drives the rotating frame 21 to rotate around the rotating shaft 212 in the electric mode, the transmission gear set 23 transmits, and the torsional elastic force of the torsion plate 26 is greater than the load resistance of the rotating component 2, and the rotating frame 21 is driven to rotate around the rotating shaft 212 through the motor in the driving component 3.

[0075] The specific arrangement of the torque plate 26 can enable the rotating assembly 2 to switch randomly between manual drive and electric drive without affecting each other.

[0076] In one embodiment, the drive assembly 3 includes a drive motor 31 , a gear box 32 and a worm gear 33 ; the output shaft end of the drive motor 31 is connected to the gear box 32 ; the output shaft end of the gear box 32 is connected to the worm gear 33 .

[0077] Specific, combined Figure 2 To further explain in detail, the driving component 3 includes a driving motor 31, a gear transmission 32 and a worm gear 33, and the output shaft end of the driving motor 31 is connected to the gear transmission 32, so that the output torque of the driving motor 31 can be correspondingly adjusted by the gear transmission 32; the output shaft end of the gear transmission 32 is connected to the worm gear 33, so that the worm gear 33 can be correspondingly meshed with the transmission bevel gear 231 in the transmission gear set 23, so that when the driving motor 31 is powered on and rotated, the driving force can be stably transmitted to the transmission gear set 23 of the rotating component 2, thereby stably realizing the function of driving the rotating frame 21 to rotate around the rotating axis 212.

[0078] In one embodiment, two sets of driving motors 31 and gearboxes 32 are provided for corresponding transmission connection; and the two sets of driving motors 31 and gearboxes 32 are symmetrically provided at two ends of the worm gear 33 .

[0079] Specific, combined Figure 2 To further explain in detail, two groups of corresponding transmission connections are set for the drive motor 31 and the gear box 32, and the two groups of drive motors 31 and gear box 32 are symmetrically arranged at both ends of the worm gear 33, so that one worm gear 33 can be driven simultaneously and synchronously by two groups of drive motors 31, fully ensuring that the worm gear 33 can generate sufficiently stable and large torque to act on the transmission bevel gear 231.

[0080] In one embodiment, the rotating assembly 2 further includes a gear support 233 for supporting and protecting the transmission gear set 23; the gear support 233 is disposed at one end of the rotating shaft 212 away from the fixing frame 22, and is fixedly connected to the fixing frame 22 via connecting screws.

[0081] Specific, combined Figure 5 To further explain in detail, a gear supporting member 233 for supporting and protecting the transmission gear set 23 is also provided in the rotating component 2, and; the gear supporting member 233 is arranged at the end of the rotating shaft 212 away from the fixed frame 22, and is fixedly connected to the fixed frame 22 by connecting screws, so that the transmission gear set 23 can be supported and limited along the axial direction of the rotating shaft 212 through the gear supporting member 233, so as to avoid the problems of meshing misalignment and transmission failure of the transmission gear set 23 after long-term use, and the gear supporting member 233 can also prevent foreign debris from entering the transmission gear set 23, so as to avoid the problem of accidental locking of the transmission gear set 23.

[0082] In one embodiment, two mounting portions 211 are symmetrically arranged along the first direction X and about the center of the rotating assembly 2 ; each mounting portion 211 is connected to a corresponding hinge shaft body 1 .

[0083] Specific, combined Figure 2 To further explain in detail, the mounting parts 211 are specifically arranged to be two symmetrically arranged along the first direction X about the center interval of the rotating component 2, and each mounting part 211 is respectively connected to a corresponding hinge shaft body 1, which can further improve the installation stability of the hinge shaft body 1 to the rotating device and the force balance of the rotating device when it rotates around the second direction Z.

[0084] In addition, an embodiment of the present disclosure further provides an electronic device, which includes a device body 4, a display screen 5 and the above-mentioned rotary hinge; the display screen 5 is movably connected to the device body 4 via a rotary hinge.

[0085] Specific, combined Figure 6To further explain in detail, the electronic device can be specifically but not limited to a laptop computer, and the display screen 5 therein is movably connected to the device body 4 via the above-mentioned rotary hinge, so the electronic device can achieve all the beneficial effects of the above-mentioned rotary hinge, which will not be further elaborated here.

[0086] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0087] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A rotary hinge, characterized in that: include: The hinge shaft body (1) is extended along a first direction (X) and has one end forming a connection end; A rotating assembly (2) having a mounting portion (211) for connecting the connecting end along the first direction (X), and the rotating assembly (2) having a rotation axis along the second direction (Z); a driving assembly (3) drivingly connected to the rotating assembly (2) and used for driving the rotating assembly (2) to rotate about the second direction (Z); Wherein, the first direction (X) and the second direction (Z) are perpendicular to each other; The hinge shaft body (1) has a mounting frame (11) for mounting the equipment to be rotated; The mounting frame (11) is capable of rotating along with the hinge shaft body (1) around the first direction (X), or rotating along with the rotating assembly (2) around the second direction (Z).

2. The rotary hinge according to claim 1, characterized in that: The rotating assembly (2) comprises: A rotating frame (21) having a rotating axis (212) extending along the second direction (Z); A fixed frame (22) is fixedly mounted on the waiting installation station and is provided with an insertion hole for inserting the rotating shaft (212); A transmission gear set (23) is mounted and sleeved on the circumferential surface of the rotating shaft (212) and is transmission-connected to the driving assembly (3); The driving assembly (3) is capable of driving the rotating frame (21) to reciprocate around the second direction (Z) via the transmission gear set (23).

3. The rotary hinge according to claim 2, characterized in that: The transmission gear set (23) comprises a synchronously mounted transmission bevel gear (231) and an encoder synchronous wheel (232); The transmission bevel gear (231) is meshedly connected with the driving assembly (3); The rotating assembly (2) is also provided with an encoder gear (24) for detecting the rotation angle of the rotating frame (21); The encoder gear (24) is meshedly connected with the encoder synchronous wheel (232).

4. The rotary hinge according to claim 3, characterized in that: The rotating assembly (2) further comprises a locking structure (25) arranged above the transmission bevel gear (231); The positioning structure (25) is provided with a first positioning point and a second positioning point along its diameter direction; The rotating frame (21) is provided with a triggering portion facing the locking structure (25); When the rotating frame (21) is at the starting position and the ending position of the rotating stroke, the trigger part is correspondingly clamped by the first limit clamping point and the second limit clamping point.

5. The rotary hinge according to claim 2, characterized in that: The rotating assembly (2) further comprises a torsion plate (26); The torsion plate (26) is sleeved on one end of the rotating shaft (212) away from the fixing frame (22), and is fixedly mounted on the rotating shaft (212) by a torsion locking member (261); The torsion plate (26) is capable of storing or releasing torsional elastic force when the rotating shaft (212) rotates.

6. The rotary hinge according to claim 2, characterized in that: The driving assembly (3) comprises a driving motor (31), a gearbox (32) and a worm gear (33); The output shaft end of the driving motor (31) is connected to the gear transmission (32); The output shaft end of the gear transmission box (32) is connected to the worm gear (33).

7. The rotary hinge according to claim 6, characterized in that: The driving motor (31) and the gearbox (32) are provided with two sets of corresponding transmission connections; Furthermore, the two sets of the driving motors (31) and the gearbox (32) are symmetrically arranged at the two ends of the worm gear (33).

8. The rotary hinge according to claim 2, characterized in that: The rotating assembly (2) further comprises a gear supporting member (233) for supporting and protecting the transmission gear set (23); The gear support member (233) is arranged at one end of the rotating shaft (212) away from the fixing frame (22), and is fixedly connected to the fixing frame (22) via connecting screws.

9. The rotary hinge according to any one of claims 1 to 8, characterized in that: Two mounting portions (211) are symmetrically arranged along the first direction (X) and about the center of the rotating assembly (2); Each of the mounting portions (211) is respectively connected and provided with a corresponding hinge shaft body (1).

10. An electronic device, characterized in that: It comprises a device body (4), a display screen (5) and a rotary hinge as claimed in any one of claims 1 to 9; The display screen (5) is movably connected to the device body (4) via the rotary hinge.

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