Torsion assembly, folding device and intelligent terminal

Abstract

The utility model provides a torsion assembly, a folding device and an intelligent terminal. The torsion assembly comprises a fixed unit, a rotating piece and a sliding piece, and the fixed unit comprises a fixed shaft; the rotating part is rotationally connected to the fixed shaft and rotates on at least one side of the fixed shaft, so that the torsion assembly has an unfolded state and a closed state; the sliding part is arranged in the axial direction of the fixed shaft in a sliding mode, the sliding part keeps making contact with the rotating part, and a cam matching structure is arranged at the position where the sliding part makes contact with the rotating part. The cam matching structure is configured to drive the rotating piece to rotate in the direction in which the torsion assembly is unfolded when the torsion assembly is in a closed state. And / or in the process that the torsion assembly is switched from the closed state to the unfolded state, the torque for pushing the rotating piece to rotate towards the unfolded state is increased. The technical problems that the intelligent terminal is strenuous to open by one hand and the hovering effect is poor in the unfolding process are solved.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to a torsion assembly, a folding device and a smart terminal. Background Art

[0002] In smart terminal devices such as foldable screen mobile phones and tablets, the folding device is the core component that realizes the closing and unfolding movement of the smart terminal. In the closed state, the folding device needs to overcome the outward tension of the flexible screen itself to maintain the closed state. Usually, a torsion component is set to make the closed state stable.

[0003] In some embodiments, the torsion assembly provides a self-locking force for expansion when the smart terminal is in the expanded state, and a self-locking force for closure when the smart terminal is in the closed state, thereby preventing the angle between the two bodies of the smart terminal from accidentally changing. During the conception and implementation of this application, it was discovered that some smart terminals have at least the following problems: the torsion assembly's large self-locking force for closure, coupled with the entire device's magnetic attraction, makes single-handed opening difficult, resulting in inconvenience in single-handed expansion and affecting the user experience. Furthermore, the hovering effect is poor during the unfolding of the smart terminal.

[0004] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Utility Model Content

[0005] In response to the above technical problems, the present application provides a torsion assembly, a folding device and a smart terminal to solve the technical problems that the smart terminal is difficult to open with one hand and has poor hovering effect during the unfolding process.

[0006] To solve the above technical problems, the present application provides a torsion assembly, comprising:

[0007] a fixing unit, the fixing unit comprising a fixing shaft;

[0008] a rotating member rotatably connected to the fixed shaft and rotating on at least one side of the fixed shaft;

[0009] a sliding member, the sliding member being slidably arranged along the axial direction of the fixed shaft, the sliding member being in contact with the rotating member, and a cam matching structure being provided at a position where the sliding member contacts the rotating member;

[0010] The cam mating structure is configured to drive the rotating member to rotate in the direction of expanding the torsion assembly when the torsion assembly is in a closed state; and / or to apply a force to the rotating member during the process of switching the torsion assembly from a closed state to an expanded state to increase the torque that pushes the rotating member to rotate toward the expanded state.

[0011] The present application provides a torsion assembly in which a cam-coupling structure is provided at the contact point between the sliding member and the rotating member. When the torsion assembly is in a closed state, the cam-coupling structure applies a force to the rotating member, driving the rotating member to rotate in the direction of expanding the torsion assembly. This reduces the self-locking force of the torsion assembly, reduces the difficulty of one-handed opening and closing operations, and facilitates one-handed opening and closing operations. In addition, when the torsion assembly switches from a closed state to an expanded state via the cam-coupling structure, a force is applied to the rotating member, increasing the torque driving the rotating member's movement. This can improve the hovering effect of the smart terminal and facilitate maintaining the stable opening angle of the smart terminal between 30° and 150°.

[0012] Optionally, the cam matching structure includes:

[0013] a first end face cam, the first end face cam comprising at least two first protrusions and at least two first grooves spaced apart from each other in an axial direction of the first end face cam, a protruding tooth and a notch being provided on a top of the first protrusion, the protruding tooth, the notch, and the first groove being arranged in sequence;

[0014] a second end face cam, the second end face cam comprising at least two second protrusions and at least two second grooves spaced apart and arranged axially around the second end face cam;

[0015] A side wall of the convex tooth close to the notch is a force-applying surface, and the force-applying surface is an inclined surface. The cam matching structure is configured so that when the torsion assembly is in a closed state, the force-applying surface and the second protrusion abut and push each other, so that the rotating member rotates in the direction of expanding the torsion assembly.

[0016] Optionally, from the top of the convex tooth to the bottom of the convex tooth, the force-applying surface gradually tilts toward the notch, and an axial tilt angle θ of the force-applying surface relative to the first end face cam satisfies: 30°≤θ≤50°.

[0017] Optionally, the bottom wall of the notch facing the second end face cam is a first mating surface, the first mating surface is an inclined surface, and the inner wall surface of the first groove on one side close to the notch is a second mating surface;

[0018] During the switching of the torsion assembly from the closed state to the expanded state, the force-applying surface, the first mating surface, and the second mating surface sequentially contact the second protrusion;

[0019] During the switching of the torsion assembly from the expanded state to the closed state, the second mating surface, the first mating surface, and the force-applying surface sequentially contact the second protrusion.

[0020] Optionally, one of the first end face cam and the second end face cam is arranged on a side of the sliding member facing the rotating member, and the other of the first end face cam and the second end face cam is arranged on a side of the rotating member facing the sliding member.

[0021] Optionally, the notch has a first end connected to the protruding tooth, and a second end opposite to the first end, and the depth of the notch gradually decreases from the first end of the notch to the second end of the notch.

[0022] Optionally, the ratio of the maximum depth H1 of the notch to the protrusion height H2 of the first protrusion satisfies: 0.5≤H1 / H2≤0.65;

[0023] From the top of the first protrusion to the bottom of the first protrusion, the second mating surface gradually tilts toward the first groove, and an axial tilt angle β of the second mating surface relative to the first end face cam satisfies: 30°≤β≤50°.

[0024] Optionally, the torsion assembly further includes an elastic member and a stop member, the stop member is fixedly disposed on the fixed unit, the elastic member is sleeved on the fixed shaft, the two ends of the elastic member are respectively abutted against the stop member and the sliding member, and the elastic member is used to apply an elastic force to the sliding member so that the sliding member maintains contact with the rotating member under the action of the elastic force.

[0025] The present application also provides a folding device, comprising a swing arm and the above-mentioned torsion assembly, wherein the swing arm is rotatably arranged on a fixed unit of the torsion assembly, and the swing arm is slidingly connected to a rotating member of the torsion assembly.

[0026] The present application also provides a smart terminal, comprising a first body, a second body, and the above-mentioned folding device, wherein the first body and the second body are respectively connected to opposite sides of the folding device;

[0027] The first body includes a first magnetic part, and the second body includes a second magnetic part. When the torsion assembly of the folding device is in a closed state, the second magnetic part is magnetically attracted to the first magnetic part, and the magnetic attraction force between the second magnetic part and the first magnetic part is greater than the force of the cam matching structure of the folding device to drive the rotating part to rotate.

[0028] In the present application, when the smart terminal is in a closed state, the torsion assembly no longer generates a force to close the smart terminal, but instead generates a force to unfold the smart terminal. Since the magnetic attraction force between the second magnetic part and the first magnetic part is greater than the force of the cam matching structure to drive the rotating part to rotate, the magnetic attraction force between the second magnetic part and the first magnetic part can still ensure that the folding device remains stably in a closed state, thereby reducing the closing self-locking force of the torsion assembly, reducing the difficulty of one-handed opening and closing operation, and helping to achieve one-handed opening and closing operation.

[0029] In addition to the technical problems solved by the embodiments of the present application described above, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions, other technical problems that can be solved by a torsion assembly, a folding device, and a smart terminal provided by the embodiments of the present application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without inventive work.

[0031] Figure 1 A schematic diagram of the structure of the folding device provided in an embodiment of the present application;

[0032] Figure 2 A schematic structural diagram of the rotating member and the sliding member of the torsion assembly provided in an embodiment of the present application when the torsion assembly is in an expanded state;

[0033] Figure 3 A schematic structural diagram of the rotating member and the sliding member of the torsion assembly provided in an embodiment of the present application when the torsion assembly is in a closed state;

[0034] Figure 4 A schematic diagram of a partial structure of a torsion assembly provided in an embodiment of the present application;

[0035] Figure 5 A schematic diagram of the three-dimensional structure of a sliding member of a torsion assembly provided in an embodiment of the present application;

[0036] Figure 6 A partial outline diagram of the first end face cam of the torsion assembly provided in an embodiment of the present application;

[0037] Figure 7A diagram showing the coordination of a first end face cam and a second end face cam of a torsion assembly provided in an embodiment of the present application;

[0038] Figure 8 An exploded view of a folding device provided in an embodiment of the present application;

[0039] Figure 9 A top view of the folding device provided in an embodiment of the present application;

[0040] Figure 10 A schematic diagram of the structure of the smart terminal provided in an embodiment of the present application;

[0041] Figure 11 A schematic diagram of the hardware structure of a mobile terminal provided in an embodiment of the present application.

[0042] Description of reference numerals:

[0043] 10-torque assembly; 11-fixed unit; 111-fixed shaft; 112-center seat; 113-rotating base; 12-rotating member; 121-rotating portion; 1211-rotating body; 1212-driving gear portion; 122-connecting arm; 13-sliding member; 14-elastic member; 15-stop member;

[0044] 21 - first end face cam; 211 - first protrusion; 212 - first groove; 213 - notch; 214 - convex tooth; 215 - first mating surface; 216 - force application surface; 217 - second mating surface; 218 - third mating surface;

[0045] 22 - second end face cam; 221 - second protrusion; 222 - second groove;

[0046] 30-carrying plate;

[0047] 40-swing arm; 41-first swing arm; 42-second swing arm;

[0048] 50-first body; 51-first magnetic member;

[0049] 60-second main body; 61-second magnetic member;

[0050] 70-transmission gear set; 71-first transmission gear; 72-second transmission gear;

[0051] 500-mobile terminal; 501-RF unit; 502-WiFi module; 503-audio output unit; 504-A / V input unit; 5041-graphics processor; 5042-microphone; 505-sensor; 506-display unit; 5061-display panel; 507-user input unit; 5071-touch panel; 5072-other input devices; 508-interface unit; 509-memory; 510-processor; 511-power supply.

[0052] The purpose of this application, its features, and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings. The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and the accompanying text are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of this application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0053] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0054] It should be noted that, in this document, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. Optionally, components, features, and elements with the same name in different embodiments of the present application may have the same meaning or different meanings, and their specific meanings need to be determined based on their explanation in the specific embodiment or further combined with the context of the specific embodiment.

[0055] It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are used solely to distinguish information of the same type from one another. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the term "if," as used herein, may be interpreted as "upon," "when," or "in response to a determination." Furthermore, as used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It should be further understood that the terms "comprising" and "including" indicate the presence of the aforementioned features, steps, operations, elements, components, items, types, and / or groups, but do not preclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, types, and / or groups. The terms "or," "and / or," "including at least one of the following," etc., as used herein, may be interpreted as inclusive, meaning any one or any combination. For example, “comprising at least one of the following: A, B, C” means “any of the following: A; B; C; A and B; A and C; B and C; A and B and C”; and for another example, “A, B or C” or “A, B and / or C” means “any of the following: A; B; C; A and B; A and C; B and C; A and B and C”. An exception to this definition will occur only when a combination of elements, functions, steps or operations are inherently mutually exclusive in some manner.

[0056] It should be understood that, although the various steps in the flowchart in the embodiment of the present application are shown in sequence according to the indication of the arrows, these steps are not necessarily performed in sequence in the order indicated by the arrows. Unless clearly stated herein, the execution of these steps is not strictly limited in order, and they can be performed in other orders. Moreover, at least a portion of the steps in the figure may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily performed at the same time, but can be performed at different times, and their execution order is not necessarily performed in sequence, but can be performed in turn or alternately with at least a portion of other steps or sub-steps or stages of other steps.

[0057] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to the determination" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)," depending on the context.

[0058] It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application.

[0059] In the subsequent description, the use of suffixes such as "module", "component" or "unit" to represent elements is only for the purpose of facilitating the description of the present application and has no specific meaning. Therefore, "module", "component" or "unit" can be used interchangeably.

[0060] Since the flexible screen itself has a certain tension, when the smart terminal is closed, the flexible screen will push the smart terminal to expand. In order to maintain the stability of the closed state, a magnet is usually set in the smart terminal. The magnetic force of the magnet and the closing self-locking force of the torsion component are used to keep the smart terminal in the closed state. However, it is difficult to open the smart terminal with one hand, which affects the user experience.

[0061] Therefore, the present application provides a torsion assembly, in which a cam mating structure is provided at the position where the sliding part contacts the rotating part. When the torsion assembly is in a closed state, the cam mating structure applies a force to the rotating part, driving the rotating part to rotate in the direction of expanding the torsion assembly, so as to reduce the closing self-locking force of the torsion assembly, reduce the difficulty of one-handed opening and closing operation, and help to achieve one-handed opening and closing operation.

[0062] The following describes a torsion assembly, a folding device, and a smart terminal provided by embodiments of the present application with reference to the accompanying drawings.

[0063] refer to Figure 1 As shown, the present application provides a torsion assembly, including a fixed unit 11, a rotating member 12 and a sliding member 13. The fixed unit 11 includes a fixed shaft 111. The rotating member 12 is rotatably connected to the fixed shaft 111 and rotates on at least one side of the fixed shaft 111, so that the torsion assembly has an expanded state and a closed state.

[0064] refer to Figure 1 、 Figure 2 and Figure 3 As shown, the sliding member 13 is slidably arranged along the axial direction of the fixed shaft 111, and the sliding member 13 maintains contact with the rotating member 12. A cam matching structure is provided at the contact position between the sliding member 13 and the rotating member 12.

[0065] The cam mating structure is configured to drive the rotating member 12 to rotate in the direction of expanding the torsion assembly when the torsion assembly is in a closed state, and to apply a force to the rotating member 12 during the process of switching the torsion assembly from a closed state to an expanded state to increase the torque that pushes the rotating member 12 to rotate toward the expanded state.

[0066] The present application provides a torsion assembly, in which a cam matching structure is provided at the position where the sliding member 13 contacts the rotating member 12. When the torsion assembly is in a closed state, the cam matching structure applies a force to the rotating member 12, driving the rotating member 12 to rotate in the direction of expanding the torsion assembly, so as to reduce the closing self-locking force of the torsion assembly, reduce the difficulty of one-handed opening and closing operation, and help to achieve one-handed opening and closing operation.

[0067] The present application provides a smart terminal that applies a force to the rotating member 12 during the switching of the torque assembly from a closed state to an expanded state through a cam cooperation structure, thereby increasing the torque driving the rotating member 12 to move, thereby improving the hovering effect of the smart terminal.

[0068] In a possible implementation, the rotating member 12 is sleeved on the fixed shaft 111 , and the rotating member 12 rotates around the fixed shaft 111 .

[0069] In a possible implementation, there may be two rotating members 12 , and the two rotating members 12 are respectively sleeved on the two fixed shafts 111 , so as to rotate relative to each other on opposite sides of the fixed shaft 111 .

[0070] In one possible implementation, the rotating member 12 includes a rotating portion 121 and a connecting arm 122 connected to one side of the rotating portion 121. The rotating portion 121 is sleeved on the fixed shaft 111. The rotating portions 121 of the two rotating members 12 rotate relative to each other, wherein the connecting arms 122 of the two rotating members 12 move away from each other, that is, the rotating members 12 rotate in a direction to expand the torsion assembly.

[0071] In a possible implementation, the fixing unit 11 further includes a center seat 112 for fixing the fixing shaft 111 , and both ends of the fixing shaft 111 may be fixed on the center seat 112 .

[0072] In one possible implementation, reference Figure 4 and Figure 5 As shown, the sliding member 13 can slide axially along the fixed shaft 111 but cannot rotate. To prevent the sliding member 13 from rotating, two fixed shafts 111 are arranged in parallel. The sliding member 13 is sleeved on the two fixed shafts 111, so that the sliding member 13 slides axially along the fixed shafts 111 but cannot rotate. The sliding member 13 maintains contact with both rotating members 12 at the same time, and a cam mating structure is provided at the contact point between each rotating member 12 and the sliding member 13.

[0073] In one possible implementation, reference Figure 5 、 Figure 6 and Figure 7As shown, the cam matching structure includes: a first end face cam 21 and a second end face cam 22, the first end face cam 21 includes at least two first protrusions 211 and at least two first grooves 212 arranged axially around the first end face cam 21, and a convex tooth 214 and a notch 213 are provided on the top of the first protrusion 211, and the convex tooth 214, the notch 213, and the first groove 212 are arranged in sequence; Figure 3 and Figure 5 As shown, the second end cam 22 includes at least two second protrusions 221 and at least two second grooves 222 that are axially spaced apart around the second end cam 22. The top of the first protrusion 211 is the end of the first protrusion 211 close to the second end cam 22.

[0074] refer to Figure 1 、 Figure 6 and Figure 7 As shown, a side wall of the convex tooth 214 close to the notch 213 is a force-applying surface 216, and the force-applying surface 216 is an inclined surface. When the torsion assembly is in a closed state, the force-applying surface 216 and the second protrusion 221 abut against and push each other, so that the rotating member 12 rotates in the direction of expanding the torsion assembly, which helps to reduce the difficulty of opening the smart terminal with one hand.

[0075] In one possible implementation, one of the first end face cam 21 and the second end face cam 22 is arranged on a side of the sliding member 13 facing the rotating member 12, and the other of the first end face cam 21 and the second end face cam 22 is arranged on a side of the rotating member 12 facing the sliding member 13.

[0076] In one possible implementation, the first end face cam 21 is disposed on a side of the sliding member 13 facing the rotating member 12, and the second end face cam 22 is disposed on a side of the rotating member 12 facing the sliding member 13. For example, the first end face cam 21 is integrally connected to the sliding member 13, and the second end face cam 22 is integrally connected to the rotating member 12. Under the rotation of the rotating member 12, the second protrusion 221 of the second end face cam 22 rotates to achieve alternating contact with the force application surface 216, the first mating surface 215, and the second mating surface 217 of the first end face cam 21.

[0077] In another possible implementation, the second end face cam 22 is disposed on a surface of the sliding member 13 that faces the rotating member 12, and the first end face cam 21 is disposed on a surface of the rotating member 12 that faces the sliding member 13. For example, the second end face cam 22 is integrally connected to the sliding member 13, and the first end face cam 21 is integrally connected to the rotating member 12. Because the sliding member 13 does not rotate, under the rotation of the rotating member 12, the force-applying surface 216, the first mating surface 215, and the second mating surface 217 of the first end face cam 21 alternately contact the second protrusion 221 of the second end face cam 22.

[0078] In this embodiment, the first end cam 21 is provided on the side of the sliding member 13 facing the rotating member 12 , and the second end cam 22 is provided on the side of the rotating member 12 facing the sliding member 13 .

[0079] refer to Figure 1 and Figure 7 As shown, when the torsion assembly is unfolded, the rotating member 12 moves along Figure 7 As shown in the +X direction rotation, by designing the force-applying surface 216 as an inclined surface, when the rotating member 12 rotates in the direction of unfolding the torsion assembly, the pushing force between the force-applying surface 216 and the side wall surface of the second protrusion 221 can push the sliding member 13 to slide axially along the fixed axis 111, and also drive the rotating member 12 to rotate in the direction of unfolding the torsion assembly, thereby reducing the obstructive force of the rotating member 12 in the direction of unfolding the torsion assembly, helping to reduce the force required for the user to unfold the smart terminal, making it more convenient to unfold the smart terminal with one hand.

[0080] In one possible implementation, reference Figure 5 As shown, the number of the first protrusions 211 and the first grooves 212 are the same, that is, the number of the first protrusions 211 can be 4, and the number of the first grooves 212 is also 4. Correspondingly, the number of the second protrusions 221 can be 4, and the number of the second grooves 222 is 4.

[0081] In other possible implementations, the number of first protrusions 211 can also be 2, 3 or 5, and accordingly, the number of first grooves 212 is also 2, 3 or 5, the number of second protrusions 221 is 2, 3 or 5, and the number of second grooves 222 is 2, 3 or 5.

[0082] In one possible implementation, reference Figure 5 and Figure 6 As shown, from the top of the protruding tooth 214 to the bottom of the protruding tooth 214 , the force applying surface 216 gradually tilts toward the direction close to the notch 213 , and the tilt angle θ of the force applying surface 216 relative to the axial direction of the first end face cam 21 satisfies: 30°≤θ≤50°.

[0083] refer to Figure 1 and Figure 7As shown, the force-applying surface 216 is an inclined surface. The force applied by the force-applying surface 216 to the second protrusion 221 is perpendicular to the force-applying surface 216. The force applied by the force-applying surface 216 to the second protrusion 221 is F1, which has a first force component F2 and a second force component F3. Because the force-applying surface 216 gradually tilts from the top of the protruding tooth 214 to the bottom of the protruding tooth 214 toward the notch 213, the direction of the first force component F2 is along the tangential direction of the second end face cam 22, and the first force component F2 is used to drive the rotating member 12 to rotate in the direction of expanding the torsion assembly. The direction of the second force component F3 is along the axial direction of the fixed shaft 111, and the second force component F3 is used to push the sliding member 13 to slide along the axial direction of the fixed shaft 111.

[0084] In one possible implementation, the inclination angle θ of the force-applying surface 216 relative to the axial direction of the first end face cam 21 can be 30°, 35°, 40°, 45°, or 50°. This ensures that the first force component F2 is not too small, and the second force component F3 is not too small, so that the force F1 applied by the force-applying surface 216 to the second protrusion 221 can drive the rotating member 12 to rotate in the direction of expanding the torsion assembly and push the sliding member 13 to slide axially along the fixed shaft 111.

[0085] In one possible implementation, reference Figure 1 、 Figure 6 and Figure 7 As shown, the bottom wall of the notch 213 facing the second end face cam 22 is a first mating surface 215, the inner wall of the first groove 212 on the side close to the notch 213 is a second mating surface 217, and the inner wall of the first groove 212 away from the notch 213 is a third mating surface 218. When the torsion assembly switches from the closed state to the expanded state, the force application surface 216, the first mating surface 215, and the second mating surface 217 sequentially contact the second protrusion 221.

[0086] When the torsion assembly is in the closed state, corresponding to the stage where the force-applying surface 216 contacts the second protrusion 221 , the pushing force applied by the force-applying surface 216 to the side wall of the second protrusion 221 helps the rotating member 12 to rotate, so that the top surface of the second protrusion 221 contacts the first mating surface 215 .

[0087] The top surface of the second protrusion 221 contacts the first mating surface 215, corresponding to the intermediate stage of the torsion assembly's unfolding movement. As the rotating member 12 continues to rotate, the second protrusion 221 leaves the first mating surface 215 and contacts the second mating surface 217. The stage in which the second protrusion 221 contacts the second mating surface 217 corresponds to the stage in which the torsion assembly is about to be flattened. As the rotating member 12 continues to rotate, the second protrusion 221 is embedded in the first groove 212, and the second protrusion 221 contacts the third mating surface 218. At this time, the self-locking force between the rotating member 12 and the sliding member 13 in the unfolded state is the largest, so that the smart terminal has good self-locking force in the unfolded state, preventing the unfolded device from loosening and shaking.

[0088] The second mating surface 217 is provided to help lock the unfolded state of the torsion assembly in the unfolding movement, increase the difficulty of the torsion assembly moving from the unfolded state to the closed state, prevent the unfolded state of the smart terminal from being difficult to maintain stably, and thus improve the user experience.

[0089] In one possible implementation, reference Figure 1 and Figure 7 As shown, during the switching process of the torsion assembly from the expanded state to the closed state, the second end face cam 22 rotates along the -X direction, and the second mating surface 217, the first mating surface 215, and the force application surface 216 sequentially contact the second protrusion 221. This is because during the switching process of the torsion assembly from the expanded state to the closed state, the rotation direction of the rotating member 12 is reversed, so the second mating surface 217, the first mating surface 215, and the force application surface 216 sequentially contact the second protrusion 221.

[0090] In one possible implementation, reference Figure 2 、 Figure 3 and Figure 8 As shown, the rotating part 121 includes a rotating body part 1211 and a driving gear part 1212. The rotating body part 1211 and the driving gear part 1212 are arranged at intervals along the axial direction of the rotating part 121. The rotating body part 1211 is in contact with the sliding member 13, and the first end face cam 21 or the second end face cam 22 is arranged on the end face of the rotating body part 1211 facing the sliding member 13.

[0091] In one possible implementation, reference Figure 6 As shown, the notch 213 has a first end connected to the protruding tooth 214 and a second end opposite to the first end. From the first end of the notch 213 to the second end of the notch 213, the depth of the notch 213 gradually decreases, that is, the first mating surface 215 is an inclined surface. Figure 6 The arrow + X indicates the direction.

[0092] With such a structure, when the smart terminal switches from a closed state to an unfolded state, when the rotating member 12 moves along the first mating surface 215, it is similar to a climbing motion, and thus the user needs to apply a certain force to satisfy the user's requirement to stably maintain the opening angle between the first body 50 and the second body 60 of the smart terminal between 30° and 150°. In addition, it prevents the entire smart terminal from loosening and shaking when unfolded, thereby improving the hovering effect.

[0093] In one possible implementation, the ratio of the maximum depth H1 of the notch 213 to the height H2 of the first protrusion 211 satisfies: 0.5≤H1 / H2≤0.65. The maximum depth H1 of the notch 213 is located at the first end of the notch 213, i.e., the end where the notch 213 meets the protruding tooth 214.

[0094] If the ratio H1 / H2 is too small, the maximum depth H1 of the notch 213 is too small, which will result in an insignificant effect on reducing the difficulty of opening the smart terminal; conversely, if the ratio H1 / H2 is too large, the maximum depth H1 of the notch 213 is too large, which will affect the depth of the first groove 212, thereby causing the unfolding self-locking force to be too small, which is not conducive to the smart terminal maintaining a stable unfolded state for use.

[0095] In one possible implementation, H1 / H2 may be, for example, 0.5, 0.8, 0.6, 0.62, or 0.65.

[0096] In one possible implementation, the second mating surface 217 gradually tilts toward the first groove 212 from the top of the first protrusion 211 toward the bottom of the first protrusion 211. The inclination angle β of the second mating surface 217 relative to the axial direction of the first end face cam 21 satisfies the following: 30°≤β≤50°. The second mating surface 217 is an inclined surface, which facilitates the second protrusion 221 of the second end face cam 22 to enter the first groove 212 along the second mating surface 217 when it contacts the second mating surface 217, thereby locking the smart terminal in the unfolded state.

[0097] In a possible implementation, the inclination angle β of the second matching surface 217 relative to the axial direction of the first end face cam 21 may be 30°, 35°, 40°, 45° or 50°.

[0098] If the tilt angle β is too large, when the rotating member 12 of the torque assembly is rotated, the second protrusion 221 of the second end face cam 22 switches from contact with the first mating surface 215 to contact with the second mating surface 217, resulting in a significant change in the opening angle. This also increases the effort required to switch the torque assembly from the expanded state to the closed state, making it inconvenient to use. Conversely, if the tilt angle β is too small, the locking force of the torque assembly in the expanded state will be reduced, making it easier for the second protrusion 221 that has entered the first groove 212 to move out of the first groove 212 along the second mating surface 217, which is not conducive to maintaining the stability of the smart terminal in the expanded state.

[0099] In one possible implementation, referring to 1 and Figure 4 As shown, the torsion assembly 10 also includes an elastic member 14 and a stop member 15. The stop member 15 is fixedly arranged on the fixed unit 11. The elastic member 14 is sleeved on the fixed shaft 111. The two ends of the elastic member 14 are respectively in contact with the stop member 15 and the sliding member 13. The elastic member 14 is used to apply elastic force to the sliding member 13 so that the sliding member 13 maintains contact with the rotating member 12 under the action of the elastic force.

[0100] In a possible implementation, the elastic member 14 may be a spring or an elastic sleeve, and there may be two elastic members 14 , which are respectively sleeved on the two fixed shafts 111 .

[0101] In a possible implementation, the stopper 15 may be a stopper plate, and the stopper 15 may be fixedly disposed on the fixed shaft 111 , or the stopper 15 may be fixedly disposed on the center seat 112 .

[0102] The stopper 15 serves to limit the elastic member 14. The rotating member 12 pushes the sliding member 13 during the rotation process, and the sliding member 13 pushes the elastic member 14. The elastic member 14 is elastically compressed. Under the action of its own elastic force, the elastic member 14 pushes the sliding member 13 toward the rotating member 12, so that the sliding member 13 maintains contact with the rotating member 12, thereby ensuring that the first end face cam 21 and the second end face cam 22 maintain contact and do not separate.

[0103] refer to Figure 8 and Figure 9 As shown, the present application further provides a folding device, comprising a swing arm 40 and the aforementioned torsion assembly, wherein the swing arm 40 is rotatably mounted on the fixed unit 11 of the torsion assembly, and the swing arm 40 is slidably connected to the rotating member 12 of the torsion assembly. A slide groove may be provided in the swing arm 40, and the side of the connecting arm 122 of the rotating member 12 forms a slide rail, and the slide rail slides along the slide groove to achieve a sliding connection between the swing arm 40 and the rotating member 12 of the torsion assembly.

[0104] In one possible implementation, the swing arm 40 includes a first swing arm 41 and a second swing arm 42 arranged opposite to each other, and the fixed unit 11 also includes a rotating base 113 fixedly set on the center seat 112. The first swing arm 41 and the second swing arm 42 are both rotatably connected to the rotating base 113. The first swing arm 41 extends to one side of the fixed unit 11, and the second swing arm 42 extends to the other side of the fixed unit 11.

[0105] In one possible implementation, there can be two first swing arms 41, the two first swing arms 41 are located at both ends of the length direction of the center seat 112, the two second swing arms 42 are located at both ends of the length direction of the center seat 112, and the first swing arm 41 and the second swing arm 42 are arranged opposite to each other.

[0106] In one possible implementation, the folding device also includes two supporting plates 30, the two ends of one supporting plate 30 are respectively connected to two first swing arms 41, and the two ends of the other supporting plate 30 are respectively connected to two second swing arms 42, and the supporting plates 30 are used to support the bending section of the flexible screen.

[0107] In one possible implementation, reference Figure 4 and Figure 8 As shown, the folding device further includes a transmission gear set 70, which includes a first transmission gear 71 and a second transmission gear 72 that mesh with each other. The first transmission gear 71 meshes with the drive gear portion 1212 of one rotating member 12, and the second transmission gear 72 meshes with the drive gear portion 1212 of the other rotating member 12. The transmission gear set 70 is used to ensure that the two rotating members 12 maintain synchronous relative rotation, thereby improving the closing efficiency of the folding device.

[0108] refer to Figure 10 As shown, the present application also provides a smart terminal, including a first body 50, a second body 60 and the above-mentioned folding device, the first body 50 and the second body 60 are respectively connected to the opposite sides of the folding device; the first body 50 includes a first magnetic part 51, and the second body 60 includes a second magnetic part 61. When the torsion assembly of the folding device is in a closed state, the second magnetic part 61 is magnetically attracted to the first magnetic part 51, and the magnetic attraction force between the second magnetic part 61 and the first magnetic part 51 is greater than the force of the cam matching structure to drive the rotating part 12 to rotate.

[0109] Through the improvement of the present application, when the smart terminal is in a closed state, the torsion assembly 10 no longer generates a force to close the smart terminal, but instead generates a force to unfold the smart terminal. Since the magnetic attraction force between the second magnetic member 61 and the first magnetic member 51 is greater than the force of the cam matching structure to drive the rotating member 12 to rotate, the magnetic attraction force between the second magnetic member 61 and the first magnetic member 51 can still ensure that the folding device remains stably in a closed state.

[0110] In one possible implementation, the swing arm 40 on one side of the fixing unit 11 is fixedly connected to the first body 50, and the swing arm 40 on the other side of the fixing unit 11 is fixedly connected to the second body 60. The swing arm 40 and the first body 50 may be connected by screws, welding, or a snap-fit ​​connection. The swing arm 40 and the second body 60 may be connected by screws, welding, or a snap-fit ​​connection.

[0111] In one possible implementation, the first magnetic member 51 is located at an end of the first body 50 away from the torsion assembly 10, and the second magnetic member 61 is located at an end of the second body 60 away from the torsion assembly 10. When the first body 50 and the second body 60 rotate to a closed state, the first magnetic member 51 and the second magnetic member 61 attract each other.

[0112] In a possible implementation, the second magnetic member 61 and the first magnetic member 51 may be magnets or electromagnets, or one of the second magnetic member 61 and the first magnetic member 51 may be a magnet and the other may be a part containing metallic iron, such as an iron sheet.

[0113] The present application provides a smart terminal, in which the closing stability of the smart terminal is improved under the magnetic force of the second magnetic member 61 and the first magnetic member 51 .

[0114] The smart terminal provided in the present application further includes a flexible screen, which is arranged on the first body 50 and the second body 60.

[0115] When unfolding the closed smart terminal, the first body 50 and the second body 60 are pushed to rotate away from each other. After rotating to a certain angle, the magnetic force between the second magnetic part 61 and the first magnetic part 51 disappears. Under the tension of the flexible screen itself and the opening force provided by the cam matching structure, the smart terminal can be naturally opened to a certain angle, thereby reducing the difficulty of opening with one hand, realizing one-handed opening and closing, and improving the convenience of unfolding the smart terminal.

[0116] The present application provides a smart terminal that has good self-locking force when unfolded, thereby preventing the entire device from loosening and shaking when unfolded.

[0117] The present application provides a smart terminal that has a certain hovering torque when the opening angle of the entire device is 30° to 150°, which satisfies the user to stably maintain the opening angle between the first body 50 and the second body 60 between 30° and 150°, thereby improving the use effect through hovering.

[0118] Smart terminals can be implemented in various forms. For example, the smart terminals described in this application may include smart terminals such as mobile phones, tablet computers, laptop computers, PDAs, portable media players (PMPs), navigation devices, wearable devices, smart bracelets, pedometers, etc., as well as fixed terminals such as digital TVs and desktop computers.

[0119] Flexible screen, i.e. flexible display screen, is used to display images. Exemplarily, the flexible screen can be an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode (Mini Organic Light-Emitting Diode) display screen, a micro organic light-emitting diode (Micro Organic Light-Emitting Diode) display screen, a micro organic light-emitting diode (Micro Organic Light-Emitting Diode) display screen, or a quantum dot light-emitting diode (QLED) display screen.

[0120] The subsequent description will be made by taking a mobile terminal as an example. It will be understood by those skilled in the art that, in addition to components specifically used for mobile purposes, the configuration according to the embodiments of the present application can also be applied to fixed-type terminals.

[0121] Please refer to Figure 11 As shown in FIG, which is a schematic diagram of the hardware structure of a mobile terminal for implementing various embodiments of the present application, the mobile terminal 500 may include: an RF (Radio Frequency) unit 501, a WiFi module 502, an audio output unit 503, an A / V (audio / video) input unit 504, a sensor 505, a display unit 506, a user input unit 507, an interface unit 508, a memory 509, a processor 510, and a power supply 511. Those skilled in the art will understand that Figure 11The structure of the mobile terminal shown in the figure does not constitute a limitation to the mobile terminal. The mobile terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0122] The following combination Figure 11 A detailed introduction to the various components of the mobile terminal:

[0123] The RF unit 501 can be used to send and receive signals during information transmission or calls. Optionally, it receives downlink information from the base station and transmits it to the processor 510 for processing. Furthermore, it transmits uplink data to the base station. Typically, the RF unit 501 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and more. Furthermore, the RF unit 501 can communicate with the network and other devices via wireless communication. The above-mentioned wireless communications may use any communication standard or protocol, including but not limited to GSM (Global System of Mobile communication), GPRS (General Packet Radio Service), CDMA2000 (Code Division Multiple Access 2000), WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), FDD-LTE (Frequency Division Duplexing-Long Term Evolution), TDD-LTE (Time Division Duplexing-Long Term Evolution) and 5G, etc.

[0124] WiFi is a short-range wireless transmission technology. The mobile terminal can help users send and receive emails, browse web pages and access streaming media through the WiFi module 502. It provides users with wireless broadband Internet access. Figure 11 A WiFi module 502 is shown, but it is understandable that it is not an essential component of the mobile terminal and can be omitted as needed without changing the essence of the application.

[0125] The audio output unit 503 can convert audio data received by the RF unit 501 or the WiFi module 502 or stored in the memory 509 into an audio signal and output it as sound when the mobile terminal 500 is in a call signal reception mode, a call mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Furthermore, the audio output unit 503 can also provide audio output related to a specific function performed by the mobile terminal 500 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 503 may include a speaker, a buzzer, or the like.

[0126] The A / V input unit 504 is used to receive audio or video signals. The A / V input unit 504 may include a graphics processing unit (GPU) 5041 and a microphone 5042. The GPU 5041 processes image data of still images or videos captured by an image capture device (such as a camera) in video capture mode or image capture mode. The processed image frames may be displayed on the display unit 506. The image frames processed by the GPU 5041 may be stored in the memory 509 (or other storage medium) or transmitted via the RF unit 501 or the WiFi module 502. The microphone 5042 may receive sound (audio data) in operating modes such as phone call mode, recording mode, and voice recognition mode, and may process such sound into audio data. In phone call mode, the processed audio (voice) data may be converted into a format that can be transmitted to a mobile communication base station via the RF unit 501. The microphone 5042 may implement various types of noise cancellation (or suppression) algorithms to eliminate (or suppress) noise or interference generated during the reception and transmission of audio signals.

[0127] The mobile terminal 500 also includes at least one sensor 505, such as a light sensor, a motion sensor, and other sensors. Optionally, the light sensor includes an ambient light sensor and a proximity sensor. Optionally, the ambient light sensor can adjust the brightness of the display panel 5061 according to the brightness of the ambient light, and the proximity sensor can turn off the display panel 5061 and / or the backlight when the mobile terminal 500 is moved to the ear. As a type of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in all directions (generally three axes), and can detect the magnitude and direction of gravity when stationary. It can be used for applications that recognize the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, tapping), etc.; as for other sensors that can be configured in the mobile phone, such as fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., they are not described here.

[0128] The display unit 506 is used to display information input by the user or information provided to the user. The display unit 506 may include a display panel 5061, which may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like.

[0129] The user input unit 507 can be used to receive input digital or character information and generate key signal input related to user settings and function control of the mobile terminal. Optionally, the user input unit 507 may include a touch panel 5071 and other input devices 5072. The touch panel 5071, also known as a touch screen, can collect user touch operations on or near it (such as operations performed by the user using a finger, stylus, or any other suitable object or accessory on or near the touch panel 5071) and drive the corresponding connection device according to a pre-set program. The touch panel 5071 may include two parts: a touch detection device and a touch controller. Optionally, the touch detection device detects the user's touch direction and detects the signal generated by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device and converts it into touch point coordinates, which are then sent to the processor 510. It can also receive commands sent by the processor 510 and execute them. In addition, the touch panel 5071 can be implemented using various types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 5071, the user input unit 507 may further include other input devices 5072. Optionally, the other input devices 5072 may include, but are not limited to, one or more of a physical keyboard, function keys (such as a volume control button, a power button, etc.), a trackball, a mouse, a joystick, etc., and the specifics are not limited here.

[0130] Optionally, the touch panel 5071 may cover the display panel 5061. When the touch panel 5071 detects a touch operation on or near it, it transmits the information to the processor 510 to determine the type of touch event. Subsequently, the processor 510 provides corresponding visual output on the display panel 5061 according to the type of touch event. Figure 11 In the figure, the touch panel 5071 and the display panel 5061 are two independent components to realize the input and output functions of the mobile terminal. However, in some embodiments, the touch panel 5071 and the display panel 5061 can be integrated to realize the input and output functions of the mobile terminal, which is not limited here.

[0131] The interface unit 508 serves as an interface through which at least one external device can be connected to the mobile terminal 500. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device with an identification module, an audio input / output (I / O) port, a video I / O port, a headphone port, etc. The interface unit 508 may be used to receive input (e.g., data information, power, etc.) from the external device and transmit the received input to one or at least one element within the mobile terminal 500, or may be used to transmit data between the mobile terminal 500 and the external device.

[0132] Memory 509 can be used to store software programs and various data. Memory 509 may primarily include a program storage area and a data storage area. Optionally, the program storage area may store an operating system and at least one application required for a function (such as a sound playback function or an image playback function); the data storage area may store data generated based on the use of the mobile phone (such as audio data, a phone book, etc.). Furthermore, memory 509 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0133] Processor 510 is the control center of the mobile terminal, connecting various components of the mobile terminal using various interfaces and circuits. By running or executing software programs and / or modules stored in memory 509 and accessing data stored in memory 509, it executes various functions of the mobile terminal and processes data, thereby providing overall monitoring of the mobile terminal. Processor 510 may include one or at least one processing unit; preferably, processor 510 may integrate an application processor and a modem processor. Optionally, the application processor primarily processes the operating system, user interface, and application programs, while the modem processor primarily handles wireless communications. It is understood that the modem processor may not be integrated into processor 510.

[0134] The mobile terminal 500 may also include a power supply 511 (such as a battery) for supplying power to various components. Preferably, the power supply 511 may be logically connected to the processor 510 through a power management system, thereby managing functions such as charging, discharging, and power consumption through the power management system.

[0135] although Figure 11 Not shown, the mobile terminal 500 may further include a Bluetooth module, etc., which will not be described in detail here.

[0136] The various technical features of the technical solution of this application can be combined arbitrarily. In order to make the description concise, not all possible combinations of the various technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0137] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A torsion assembly, characterized in that: include: A fixing unit (11), wherein the fixing unit (11) includes a fixing shaft (111); a rotating member (12), the rotating member (12) being rotatably connected to the fixed shaft (111) and rotating on at least one side of the fixed shaft (111); a sliding member (13), the sliding member (13) being slidably arranged along the axial direction of the fixed shaft (111), the sliding member (13) being in contact with the rotating member (12), and a cam matching structure being provided at a position where the sliding member (13) contacts the rotating member (12); The cam matching structure is configured to drive the rotating member (12) to rotate in the direction of the torsion assembly being expanded when the torsion assembly is in a closed state; and / or to apply a force to the rotating member (12) during the process of switching the torsion assembly from the closed state to the expanded state, so as to increase the torque that drives the rotating member (12) to rotate toward the expanded state.

2. The torsion assembly according to claim 1, characterized in that: The cam matching structure includes: A first end face cam (21), the first end face cam (21) comprising at least two first protrusions (211) and at least two first grooves (212) arranged axially and spaced apart from each other around the first end face cam (21), a convex tooth (214) and a notch (213) being provided on the top of the first protrusion (211), the convex tooth (214), the notch (213), and the first groove (212) being arranged in sequence; a second end face cam (22), the second end face cam (22) comprising at least two second protrusions (221) and at least two second grooves (222) arranged axially and spaced apart from each other around the second end face cam (22); A side wall of the convex tooth (214) close to the notch (213) is a force-applying surface (216), and the force-applying surface (216) is an inclined surface. The cam matching structure is configured so that when the torsion assembly is in a closed state, the force-applying surface (216) and the second protrusion (221) abut against and push against each other, so that the rotating member (12) rotates in a direction to expand the torsion assembly.

3. The torsion assembly according to claim 2, characterized in that: From the top of the convex tooth (214) to the bottom of the convex tooth (214), the force-applying surface (216) gradually tilts toward the direction approaching the notch (213), and an axial tilt angle θ of the force-applying surface (216) relative to the first end face cam (21) satisfies the following: 30°≤θ≤50°.

4. The torsion assembly according to claim 2, wherein: The bottom wall of the notch (213) facing the second end face cam (22) is a first matching surface (215), and the inner wall surface of the first groove (212) close to the notch (213) is a second matching surface (217); During the process of switching the torsion assembly from the closed state to the expanded state, the force application surface (216), the first mating surface (215), and the second mating surface (217) sequentially contact the second protrusion (221); During the process of switching the torsion assembly from the expanded state to the closed state, the second mating surface (217), the first mating surface (215), and the force-applying surface (216) sequentially contact the second protrusion (221).

5. The torsion assembly according to claim 2, characterized in that: One of the first end face cam (21) and the second end face cam (22) is arranged on a side of the sliding member (13) facing the rotating member (12), and the other of the first end face cam (21) and the second end face cam (22) is arranged on a side of the rotating member (12) facing the sliding member (13).

6. The torsion assembly according to claim 2, characterized in that: The notch (213) has a first end connected to the protruding tooth (214) and a second end opposite to the first end; the depth of the notch (213) gradually decreases from the first end of the notch (213) to the second end of the notch (213).

7. The torsion assembly according to claim 4, characterized in that: The ratio between the maximum depth H1 of the notch (213) and the protrusion height H2 of the first protrusion (211) satisfies: 0.5≤H1 / H2≤0.65; From the top of the first protrusion (211) to the bottom of the first protrusion (211), the second mating surface (217) gradually tilts toward the direction approaching the first groove (212), and the axial tilt angle β of the second mating surface (217) relative to the first end face cam (21) satisfies: 30°≤β≤50°.

8. The torsion assembly according to any one of claims 1 to 7, characterized in that: The torsion assembly (10) further comprises an elastic member (14) and a stop member (15), wherein the stop member (15) is fixedly arranged on the fixing unit (11), and the elastic member (14) is sleeved on the fixing shaft (111). Both ends of the elastic member (14) respectively abut against the stop member (15) and the sliding member (13), and the elastic member (14) is used to apply an elastic force to the sliding member (13), so that the sliding member (13) maintains contact with the rotating member (12) under the action of the elastic force.

9. A folding device, characterized in that: It comprises a swing arm (40) and a torsion assembly as described in any one of claims 1 to 8, wherein the swing arm (40) is rotatably arranged on a fixed unit (11) of the torsion assembly, and the swing arm (40) is slidingly connected to a rotating member (12) of the torsion assembly.

10. An intelligent terminal, characterized in that: The folding device comprises a first body (50), a second body (60), and the folding device according to claim 9, wherein the first body (50) and the second body (60) are respectively connected to opposite sides of the folding device; The first body (50) includes a first magnetic part (51), and the second body (60) includes a second magnetic part (61). When the torsion assembly of the folding device is in a closed state, the second magnetic part (61) and the first magnetic part (51) are magnetically attracted to each other, and the magnetic attraction force between the second magnetic part (61) and the first magnetic part (51) is greater than the force of the cam matching structure of the folding device to drive the rotating part (12) to rotate.

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