Hinge torsion assembly and electronic equipment

Abstract

The utility model relates to the technical field of hinges, and provides a hinge torsion component and electronic equipment, which comprise a rotating rod, a swing arm and a transmission component. The number of the rotating rods is two, and the two rotating rods are arranged in parallel and are relatively fixed; the two swing arms are rotationally arranged on the two rotating rods in a sleeving mode in a one-to-one correspondence mode, and the swing arms are provided with threads; the transmission assembly is arranged between the two rotating rods and comprises a helical tooth piece, helical teeth used for being meshed with threads of the swing arms are arranged on the two opposite sides of the helical tooth piece, the helical tooth piece can reciprocate along the axes of the rotating rods, and when one swing arm rotates clockwise around the axis of the corresponding rotating rod, the helical tooth piece rotates around the axis of the corresponding rotating rod. The transmission assembly can drive the other swing arm to rotate anticlockwise in the axial direction of the rotating rod. Thus, the two swing arms are in transmission with the transmission assembly through the threads respectively, synchronous and reverse overturning actions between the two swing arms can be achieved, and the threads further have the advantage of being high in bearing capacity.

Description

Technical Field

[0001] The utility model relates to the technical field of hinges, and in particular to a hinge torsion assembly and electronic equipment. Background Art

[0002] With the recent rise of foldable phones, manufacturers have placed increasingly stringent requirements on hinges, with smooth hinge rotation and a particularly crucial feel. This demand for hinge play and minimal play is directly linked to the meshing state of the torque module. Traditional torque modules utilize gear transmissions, and because the teeth are typically small, the root of the teeth is weak and prone to breakage, compromising usability.

[0003] Therefore, there is an urgent need for a hinge torsion assembly and an electronic device to solve the above technical problems. Utility Model Content

[0004] The purpose of the present utility model is to provide a hinge torsion assembly and an electronic device, which can realize synchronous and reverse flipping movements between two swing arms, and the hinge position also has a relatively strong load-bearing capacity.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] Hinge torsion assembly, comprising:

[0007] Rotating rods, two of which are provided, and the two rotating rods are arranged in parallel and relatively fixed;

[0008] Swing arms, two of which are provided and rotatably sleeved with the two rotating rods in a one-to-one correspondence, and the swing arms are provided with threads;

[0009] A transmission assembly is arranged between the two rotating rods. The transmission assembly includes a helical gear part. Helical teeth for engaging with the threads of the swing arms are arranged on opposite sides of the helical gear part. The helical gear part can reciprocate along the axis of the rotating rod. When one of the swing arms rotates clockwise around the axis of the rotating rod, the other swing arm can be driven to rotate counterclockwise around the axial direction of the rotating rod through the transmission assembly.

[0010] As a preferred technical solution of the above-mentioned hinge torsion assembly, the above-mentioned transmission assembly also includes a connecting member, which is sleeved on at least one of the two above-mentioned rotating rods. The above-mentioned connecting member is provided with a guide rod, which is parallel to the above-mentioned rotating rod, and the above-mentioned bevel gear is slidably sleeved on the above-mentioned guide rod.

[0011] As a preferred technical solution of the above-mentioned hinge torsion assembly, the above-mentioned swing arm includes a first sleeve portion and a second sleeve portion, the above-mentioned first sleeve portion and the above-mentioned second sleeve portion are both sleeved on the outside of the above-mentioned rotating rod, the third sleeve portion of the above-mentioned connecting member is sleeved on the above-mentioned rotating rod and is located between the above-mentioned first sleeve portion and the above-mentioned second sleeve portion, and the above-mentioned connecting member can move along the axis of the above-mentioned rotating rod with the above-mentioned swing arm.

[0012] As a preferred technical solution of the above-mentioned hinge torsion assembly, the above-mentioned connecting member includes a first limiting surface and a second limiting surface, and the above-mentioned first limiting surface and the above-mentioned second limiting surface are distributed around the axis of the above-mentioned rotating rod. The above-mentioned swing arm can rotate between the above-mentioned first limiting surface and the above-mentioned second limiting surface and can abut against one of them along the circumference of the above-mentioned rotating rod.

[0013] As a preferred technical solution of the above-mentioned hinge torsion assembly, the above-mentioned first limiting surface and the above-mentioned second limiting surface are formed on the above-mentioned third sleeve part, and the above-mentioned second sleeve part and / or the above-mentioned first sleeve part are protrudingly provided with abutment blocks for abutting with the above-mentioned first limiting surface and the second limiting surface.

[0014] As a preferred technical solution of the above-mentioned hinge torsion assembly, it also includes a positioning member, two of which are provided, at least one of which can move back and forth along the axis of the above-mentioned rotating rod, and at least one of the two positioning members is provided with a plurality of first positioning teeth, the plurality of first positioning teeth are distributed around the axis of the above-mentioned rotating rod and are circumferentially fixed relative to the above-mentioned rotating rod, the above-mentioned swing arm is provided with a second positioning tooth, the above-mentioned second positioning tooth can engage with or loosen with the above-mentioned first positioning tooth, and the above-mentioned swing arm can be clamped between the two positioning members.

[0015] As a preferred technical solution for the above-mentioned hinge torsion assembly, the two above-mentioned positioning parts are divided into a movable positioning part and a fixed positioning part. The above-mentioned fixed positioning part is fixedly sleeved on the above-mentioned rotating rod, and the above-mentioned movable positioning part is slidably sleeved on the above-mentioned rotating rod. The above-mentioned rotating rod is sleeved with an elastic part, and the above-mentioned elastic part is located on the side of the above-mentioned movable positioning part facing away from the above-mentioned swing arm. The above-mentioned elastic part makes the above-mentioned movable positioning part always have a tendency to move toward the side of the above-mentioned fixed positioning part.

[0016] As a preferred technical solution of the hinge torsion assembly, the rotating rod is provided with a fixing piece, and the elastic member is sandwiched between the fixing piece and the movable positioning member in the axial direction of the rotating rod.

[0017] As a preferred technical solution of the hinge torsion assembly, the rotating rod is provided with a retaining spring, which abuts against the fixing plate at a side of the fixing plate facing away from the elastic member.

[0018] An electronic device is also provided, comprising the hinge torsion assembly.

[0019] Beneficial effects of the utility model:

[0020] The utility model provides a hinge torsion assembly and electronic equipment, comprising a rotating rod, a swing arm, and a transmission assembly. The two rotating rods are provided, the two rotating rods being arranged in parallel and relatively fixed; the two swing arms are provided, rotatably sleeved with the two rotating rods in a one-to-one correspondence, and the swing arms are provided with threads; the transmission assembly is provided between the two rotating rods, and the transmission assembly includes a helical gear member, with helical teeth arranged on opposite sides of the helical gear member for engaging with the threads of the swing arms. The helical gear member can reciprocate along the axis of the rotating rod. When one swing arm rotates clockwise about the axis of the rotating rod, the transmission assembly can drive the other swing arm to rotate counterclockwise about the axial direction of the rotating rod.

[0021] 14. The repairing kit for automotive dents, according to claim 13, wherein the foot stand comprises a through-hole, and the two foot pieces comprise two bosses, wherein the bosses comprise a through-hole, a screw bolt, and a nut. The through-hole, the screw bolts comprise a through-hole, and a nut. The through-holes of the bosses comprise a through-hole, and a nut. The bosses comprise a through-hole, a screw bolt, and a nut. In this way, the two swing arms are respectively driven by threads and transmission components, which can not only realize synchronization and reverse flipping movements between the two swing arms, but the threads also have the advantage of high load-bearing capacity.

[0022] Thus, the electronic device using the hinge torsion assembly provided by the present application has a high synchronization rate of folding action and strong acceptance capability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0024] Figure 1 This is a schematic structural diagram of a hinge torsion assembly provided by an embodiment of the present utility model;

[0025] Figure 2 1 is an exploded schematic diagram of a hinge torsion assembly provided by an embodiment of the present utility model;

[0026] Figure 3 This is a schematic structural diagram of the third set of parts provided in an embodiment of the present utility model;

[0027] Figure 4 It is a structural schematic diagram of the swing arm provided by an embodiment of the utility model.

[0028] In the picture:

[0029] 10. Rotating rod; 10a. First rotating rod; 10b. Second rotating rod;

[0030] 20. Swing arm; 20a. First swing arm; 20b. Second swing arm; 21. Thread; 22. First sleeve portion; 23. Second sleeve portion; 231. Abutment block; 24. Second positioning tooth;

[0031] 30. Transmission assembly; 31. Helical gear; 32. Connecting member; 321. Guide rod; 322. First limiting surface; 323. Second limiting surface; 324. Third sleeve portion;

[0032] 40. Positioning member; 40a. Fixed positioning member; 40b. Movable positioning member; 41. First positioning tooth;

[0033] 50. Elastic member; 61. Fixed plate; 62. Circlip. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0035] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0036] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0037] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0038] like Figures 1 to 4 As shown, the present invention provides a hinge torsion assembly, comprising a rotating rod 10, a swing arm 20, and a transmission assembly 30. Two rotating rods 10 are provided, and the two rotating rods 10 are arranged in parallel and relatively fixed; two swing arms 20 are provided, and are rotatably sleeved with the two rotating rods 10 in a one-to-one correspondence, and the swing arms 20 are provided with threads 21; the transmission assembly 30 is arranged between the two rotating rods 10, and the transmission assembly 30 includes a helical gear 31, and the helical gear 31 has helical teeth arranged on opposite sides for engaging with the threads 21 of the swing arms 20. The helical gear 31 can reciprocate along the axis of the rotating rod 10. When one of the swing arms 20 rotates clockwise around the axis of the rotating rod 10, the transmission assembly 30 can drive the other swing arm 20 to rotate counterclockwise around the axial direction of the rotating rod 10.

[0039] Specifically, the two rotating rods 10 are denoted as a first rotating rod 10a and a second rotating rod 10b, and the two rotating rods 10 are parallel and spaced apart in the radial direction thereof; the two swing arms 20 are denoted as a first swing arm 20a and a second swing arm 20b, and the first swing arm 20a is mounted on the first rotating rod 10a, and the second swing arm 20b is mounted on the second rotating rod 10b, and the two swing arms 20 are both capable of rotating around the axis of their respective corresponding rotating rods 10, and the swing arms 20 are provided with threads 21, and the threads 21 of the first swing arm 20a and the threads 21 of the second swing arm 20b are mirror-imaged in the radial direction of the rotating rod 10, that is, the inclination of the threads 21 of the two swing arms 20 is the same as that of the first swing arm 20a and the second swing arm 20b. The bevel angles are opposite; for example, the transmission assembly 30 is located between the two rotating rods 10, that is, between the two swing arms 20. The helical teeth 31 are provided on opposite sides of the helical teeth, which respectively engage with the threads 21 of the swing arms 20 on the same side. When the first swing arm 20a rotates clockwise, the first swing arm 20a drives the helical teeth 31 to move along the axis of the rotating rod 10. Because the threads 21 of the first swing arm 20a and the threads 21 of the second swing arm 20b are mirror images, the helical teeth 31 can also drive the second swing arm 20b to move counterclockwise, that is, the rotation directions of the first swing arm 20a and the second swing arm 20b are always opposite. In this way, the two swing arms 20 are respectively driven by the transmission assembly 30 through the threads 21, which can not only achieve synchronous and reverse flipping movements between the two swing arms 20, but also have the advantage of high load-bearing capacity.

[0040] It should be noted that the transmission model of the helical teeth and the thread 21 is a well-known transmission model in the mechanical field, and its specific force mode and relative motion process will not be described in detail here.

[0041] Optionally, the transmission assembly 30 further includes a connecting member 32, which is sleeved on at least one of the two rotating rods 10. The connecting member 32 is provided with a guide rod 321, which is parallel to the rotating rod 10, and the helical gear member 31 is slidably sleeved on the guide rod 321. In this way, the connecting member 32, by being sleeved and connected to at least one of the rotating rods 10, can ensure the relative fixation of the at least one rotating rod 10 of the connecting member 32, thereby maintaining the parallelism of the guide rod 321 and the rotating rod 10. The helical gear member 31 is slidably sleeved on the guide rod 321 to regulate the movement path of the helical gear member 31, thereby preventing the helical gear member 31 from getting stuck with the swing arm 20, maintaining smooth transmission between the two swing arms 20, and maintaining a high synchronization rate.

[0042] For example, in this embodiment, the connecting member 32 is simultaneously sleeved on the two rotating rods 10 , so that the relative stability of the connecting member 32 and the two rotating rods 10 can be further maintained.

[0043] In other embodiments, the connecting member 32 is sleeved on one of the rotating rods 10, and the rotating rod 10 includes a first connecting portion and a second connecting portion along the axial direction. The cross-section of the first connecting portion is circular, and the swing arm 20 is rotatably sleeved on the first connecting portion; the cross-section of the second connecting portion is polygonal, and the cross-section of the mounting hole of the connecting member 32 is a corresponding polygon. The connecting member 32 is sleeved on the second connecting portion, and the polygonal cross-section is used to limit the connecting member 32 from rotating around the rotating rod 10.

[0044] Optionally, the swing arm 20 includes a first sleeve portion 22 and a second sleeve portion 23, both of which are sleeved on the outside of the rotating rod 10, and the third sleeve portion 324 of the connecting member 32 is sleeved on the rotating rod 10 and located between the first sleeve portion 22 and the second sleeve portion 23. The connecting member 32 can move along the axis of the rotating rod 10 with the swing arm 20. Exemplarily, in this embodiment, the swing arm 20 is rotatably connected to the rotating rod 10 through the first sleeve portion 22 and the second sleeve portion 23. The first sleeve portion 22 and the second sleeve portion 23 are spaced apart in the axial direction of the rotating rod 10 to form a mounting groove. The third sleeve portion 324 of the connecting member 32 is inserted into the mounting groove and sleeved on the rotating rod 10 in the mounting groove. The connecting member 32 can move along the axial direction of the rotating rod 10 with the swing arm 20, thereby maintaining the reliability of the engagement between the helical gear 31 and the swing arm 20.

[0045] Optionally, the connecting member 32 includes a first limiting surface 322 and a second limiting surface 323, and the first limiting surface 322 and the second limiting surface 323 are distributed around the axis of the rotating rod 10. The swing arm 20 can rotate between the first limiting surface 322 and the second limiting surface 323 and can abut against one of them along the circumference of the rotating rod 10.

[0046] Exemplarily, the connecting member 32 is provided with a limiting groove, the depth direction of the limiting groove is parallel to the axis of the rotating rod 10, and the two side walls of the limiting groove located in the circumference of the rotating rod 10 are the first limiting surface 322 and the second limiting surface 323. The swing arm 20 is at least partially inserted in the limiting groove and can rotate around the axis of the rotating rod 10 in the limiting groove. The first limiting surface 322 and the second limiting surface 323 are respectively used to mark the two extreme positions of the swing arm 20. When the swing arm 20 abuts against one of the first limiting surface 322 and the second limiting surface 323, it cannot continue to rotate in the same direction.

[0047] Optionally, the first limiting surface 322 and the second limiting surface 323 are formed on the third sleeve portion 324, and the second sleeve portion 23 and / or the first sleeve portion 22 are provided with a protruding abutment block 231 for abutting against the first limiting surface 322 and the second limiting surface 323. In this way, the swing arm 20 can always be kept between the first limiting surface 322 and the second limiting surface 323.

[0048] Optionally, the hinge torsion assembly further includes a positioning member 40, two of which are provided, at least one of which is capable of reciprocating along the axis of the rotating rod 10, and at least one of the two positioning members 40 is provided with a plurality of first positioning teeth 41, the plurality of first positioning teeth 41 being distributed around the axis of the rotating rod 10 and circumferentially fixed relative to the rotating rod 10, and the swing arm 20 is provided with a second positioning tooth 24, the second positioning tooth 24 being capable of engaging or disengaging with the first positioning tooth 41, and the swing arm 20 being capable of being clamped between the two positioning members 40. Because the first positioning teeth 41 cannot rotate around the axis of the rotating rod 10, each first positioning tooth 41 is relatively fixed in a circumferential position relative to the rotating rod 10. When the first positioning teeth 41 engage with the second positioning teeth 24, the swing arm 20 is unable to rotate around the axis of the rotating rod 10 and is in a locked state.

[0049] It should be noted that the positioning member 40 cannot rotate around the axis of the rotating rod 10 , so each first positioning tooth 41 is fixed relative to the rotating rod 10 in the circumferential direction.

[0050] Optionally, the two positioning members 40 are divided into a movable positioning member 40b and a fixed positioning member 40a. The fixed positioning member 40a is fixedly sleeved on the rotating rod 10, and the movable positioning member 40b is slidably sleeved on the rotating rod 10. The rotating rod 10 is sleeved with an elastic member 50. The elastic member 50 is located on the side of the movable positioning member 40b facing away from the swing arm 20. The elastic member 50 makes the movable positioning member 40b always have a tendency to move toward the side of the fixed positioning member 40a.

[0051] In this embodiment, one of the positioning members 40 is a fixed positioning member 40a, which is fixed to the rotating rod 10. The other positioning member 40 is a movable positioning member 40b. Under the action of the elastic member 50, the movable positioning member 40b always has a tendency to move the swing arm 20 against the fixed positioning member 40a, thereby maintaining the engagement between the first positioning tooth 41 and the second positioning tooth 24, thereby locking the relative position of the swing arm 20 and the rotating rod 10. When the swing arm 20 is rotated, the engagement of the first positioning tooth 41 and the second positioning tooth 24 converts the torsional force of the swing arm 20 into a force acting on the movable positioning member 40b along the axial direction of the rotating rod 10. The elastic member 50 is compressed, the first positioning tooth 41 and the second positioning tooth 24 are loosened, and the swing arm 20 can rotate relative to the rotating rod 10.

[0052] Furthermore, in this embodiment, both the fixed positioning member 40 a and the movable positioning member 40 b are provided with first positioning teeth 41 , and the opposite ends of the swing arm 20 are also correspondingly provided with second positioning teeth 24 for cooperating therewith.

[0053] Furthermore, the circumferential distribution of the first positioning teeth 41 and the second positioning teeth 24 can be set as needed to limit the angle of rotation of the swing arm 20 each time. Schematically, four first positioning teeth 41 and four second positioning teeth 24 are provided, which are evenly distributed in the circumferential direction, and there is a 90° angle between two adjacent teeth. In this way, the rotation angle between each two engagements of the first positioning teeth 41 and the second positioning teeth 24 is 90°.

[0054] In other embodiments, both positioning members 40 are movable positioning members 40 b.

[0055] Optionally, the elastic member 50 is a spring, which can be sleeved on the rotating rod 10 , and the elastic deformation direction of the spring is the axial direction of the rotating rod 10 .

[0056] Optionally, the rotating rod 10 is installed with a fixing piece 61 , and the elastic member 50 is sandwiched between the fixing piece 61 and the movable positioning member 40 b in the axial direction of the rotating rod 10 .

[0057] Furthermore, the rotating rod 10 is further provided with a clamping spring 62 , which abuts against the fixing plate 61 at a side of the fixing plate 61 facing away from the elastic member 50 .

[0058] In this embodiment, the positioning member 40 , the fixing piece 61 and the connecting member 32 are all connected to the two rotating rods 10 at the same time, thereby maintaining the relative stability of the two rotating rods 10 .

[0059] The utility model also provides an electronic device, comprising the above-mentioned hinge torsion assembly.

[0060] Furthermore, the above are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. Hinge torsion assembly, characterized in that, include: A rotating rod (10), wherein two rotating rods (10) are provided, and the two rotating rods (10) are arranged in parallel and relatively fixed; Two swing arms (20) are provided, and are rotatably sleeved in a one-to-one correspondence with the two rotating rods (10). The swing arms (20) are provided with threads (21); A transmission assembly (30) is provided between the two rotating rods (10), and the transmission assembly (30) includes a helical gear (31). Helical teeth for engaging with the threads (21) of the swing arms (20) are arranged on opposite sides of the helical gear (31). The helical gear (31) can reciprocate along the axis of the rotating rod (10). When one of the swing arms (20) rotates clockwise around the axis of the rotating rod (10), the transmission assembly (30) can drive the other swing arm (20) to rotate counterclockwise around the axial direction of the rotating rod (10).

2. The hinge torsion assembly according to claim 1, characterized in that: The transmission assembly (30) further comprises a connecting member (32), wherein the connecting member (32) is sleeved on at least one of the two rotating rods (10), the connecting member (32) is provided with a guide rod (321), the guide rod (321) is parallel to the rotating rod (10), and the helical gear member (31) is slidably sleeved on the guide rod (321).

3. The hinge torsion assembly according to claim 2, characterized in that: The swing arm (20) comprises a first sleeve portion (22) and a second sleeve portion (23); the first sleeve portion (22) and the second sleeve portion (23) are both sleeved outside the rotating rod (10); the third sleeve portion (324) of the connecting member (32) is sleeved on the rotating rod (10) and is located between the first sleeve portion (22) and the second sleeve portion (23); and the connecting member (32) can move along the axis of the rotating rod (10) along with the swing arm (20).

4. The hinge torsion assembly according to claim 3, characterized in that: The connecting member (32) comprises a first limiting surface (322) and a second limiting surface (323), wherein the first limiting surface (322) and the second limiting surface (323) are distributed around the axis of the rotating rod (10), and the swing arm (20) can rotate between the first limiting surface (322) and the second limiting surface (323) and can abut against one of the first limiting surface (322) and the second limiting surface (323) along the circumference of the rotating rod (10).

5. The hinge torsion assembly according to claim 4, characterized in that: The first limiting surface (322) and the second limiting surface (323) are formed on the third sleeve portion (324), and the second sleeve portion (23) and / or the first sleeve portion (22) are provided with a protruding abutment block (231) for abutting against the first limiting surface (322) and the second limiting surface (323).

6. The hinge torsion assembly according to any one of claims 1 to 5, characterized in that: The invention also includes a positioning member (40), wherein two positioning members (40) are provided, at least one of which can reciprocate along the axis of the rotating rod (10), and at least one of the two positioning members (40) is provided with a plurality of first positioning teeth (41), the plurality of first positioning teeth (41) are distributed around the axis of the rotating rod (10) and are fixed relative to the rotating rod (10) in the circumferential direction, the swing arm (20) is provided with a second positioning tooth (24), the second positioning tooth (24) can be engaged with or disengaged from the first positioning tooth (41), and the swing arm (20) can be clamped between the two positioning members (40).

7. The hinge torsion assembly according to claim 6, characterized in that: The two positioning members (40) are divided into a movable positioning member (40b) and a fixed positioning member (40a). The fixed positioning member (40a) is fixedly sleeved on the rotating rod (10), and the movable positioning member (40b) is slidably sleeved on the rotating rod (10). The rotating rod (10) is sleeved with an elastic member (50). The elastic member (50) is located on the side of the movable positioning member (40b) facing away from the swing arm (20). The elastic member (50) enables the movable positioning member (40b) to always have a tendency to move toward the side of the fixed positioning member (40a).

8. The hinge torsion assembly according to claim 7, characterized in that: The rotating rod (10) is equipped with a fixing plate (61), and the elastic member (50) is sandwiched between the fixing plate (61) and the movable positioning member (40b) in the axial direction of the rotating rod (10).

9. The hinge torsion assembly according to claim 8, characterized in that: The rotating rod (10) is provided with a retaining spring (62), and the retaining spring (62) abuts against the fixing plate (61) on the side of the fixing plate (61) facing away from the elastic member (50).

10. An electronic device, characterized in that The hinge torsion assembly comprises the hinge torsion assembly according to any one of claims 1 to 9.

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